diff options
Diffstat (limited to 'flist.c')
| -rw-r--r-- | flist.c | 3410 |
1 files changed, 3410 insertions, 0 deletions
@@ -0,0 +1,3410 @@ +/* + * Generate and receive file lists. + * + * Copyright (C) 1996 Andrew Tridgell + * Copyright (C) 1996 Paul Mackerras + * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> + * Copyright (C) 2002-2022 Wayne Davison + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, visit the http://fsf.org website. + */ + +#include "rsync.h" +#include "ifuncs.h" +#include "rounding.h" +#include "inums.h" +#include "io.h" + +extern int am_root; +extern int am_server; +extern int am_daemon; +extern int am_sender; +extern int am_generator; +extern int inc_recurse; +extern int always_checksum; +extern int module_id; +extern int ignore_errors; +extern int numeric_ids; +extern int quiet; +extern int recurse; +extern int use_qsort; +extern int xfer_dirs; +extern int filesfrom_fd; +extern int one_file_system; +extern int copy_devices; +extern int copy_dirlinks; +extern int preserve_uid; +extern int preserve_gid; +extern int preserve_acls; +extern int preserve_xattrs; +extern int preserve_links; +extern int preserve_hard_links; +extern int preserve_devices; +extern int preserve_specials; +extern int delete_during; +extern int missing_args; +extern int eol_nulls; +extern int atimes_ndx; +extern int crtimes_ndx; +extern int relative_paths; +extern int implied_dirs; +extern int ignore_perishable; +extern int non_perishable_cnt; +extern int prune_empty_dirs; +extern int copy_links; +extern int copy_unsafe_links; +extern int protocol_version; +extern int sanitize_paths; +extern int munge_symlinks; +extern int use_safe_inc_flist; +extern int need_unsorted_flist; +extern int sender_symlink_iconv; +extern int output_needs_newline; +extern int sender_keeps_checksum; +extern int trust_sender_filter; +extern int unsort_ndx; +extern uid_t our_uid; +extern struct stats stats; +extern char *filesfrom_host; +extern char *usermap, *groupmap; + +extern struct name_num_item *file_sum_nni; + +extern char curr_dir[MAXPATHLEN]; + +extern struct chmod_mode_struct *chmod_modes; + +extern filter_rule_list filter_list, implied_filter_list, daemon_filter_list; + +#ifdef ICONV_OPTION +extern int filesfrom_convert; +extern iconv_t ic_send, ic_recv; +#endif + +#define PTR_SIZE (sizeof (struct file_struct *)) + +int io_error; +int flist_csum_len; +dev_t filesystem_dev; /* used to implement -x */ + +struct file_list *cur_flist, *first_flist, *dir_flist; +int send_dir_ndx = -1, send_dir_depth = -1; +int flist_cnt = 0; /* how many (non-tmp) file list objects exist */ +int file_total = 0; /* total of all active items over all file-lists */ +int file_old_total = 0; /* total of active items that will soon be gone */ +int flist_eof = 0; /* all the file-lists are now known */ +int xfer_flags_as_varint = 0; + +#define NORMAL_NAME 0 +#define SLASH_ENDING_NAME 1 +#define DOTDIR_NAME 2 +#define MISSING_NAME 3 + +/* Starting from protocol version 26, we always use 64-bit ino_t and dev_t + * internally, even if this platform does not allow files to have 64-bit inums. + * The only exception is if we're on a platform with no 64-bit type at all. + * + * Because we use read_longint() to get these off the wire, if you transfer + * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a + * machine with no 64-bit types then you will get an overflow error. + * + * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris) + * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will + * be truncated. But it's a kind of silly thing to do anyhow. */ + +/* The tmp_* vars are used as a cache area by make_file() to store data + * that the sender doesn't need to remember in its file list. The data + * will survive just long enough to be used by send_file_entry(). */ +static dev_t tmp_rdev; +#ifdef SUPPORT_HARD_LINKS +static int64 tmp_dev = -1, tmp_ino; +#endif +static char tmp_sum[MAX_DIGEST_LEN]; + +static char empty_sum[MAX_DIGEST_LEN]; +static int flist_count_offset; /* for --delete --progress */ +static int show_filelist_progress; + +static struct file_list *flist_new(int flags, const char *msg); +static void flist_sort_and_clean(struct file_list *flist, int strip_root); +static void output_flist(struct file_list *flist); + +void init_flist(void) +{ + if (DEBUG_GTE(FLIST, 4)) { + rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n", + (int)FILE_STRUCT_LEN, (int)EXTRA_LEN); + } + /* Note that this isn't identical to file_sum_len in the case of CSUM_MD4_ARCHAIC: */ + flist_csum_len = csum_len_for_type(file_sum_nni->num, 1); + + show_filelist_progress = INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse; +} + +static void start_filelist_progress(char *kind) +{ + if (quiet) + return; + rprintf(FCLIENT, "%s ... ", kind); + output_needs_newline = 1; + rflush(FINFO); +} + +static void emit_filelist_progress(int count) +{ + if (quiet) + return; + if (output_needs_newline == 2) /* avoid a newline in the middle of this filelist-progress output */ + output_needs_newline = 0; + rprintf(FCLIENT, " %d files...\r", count); + output_needs_newline = 2; +} + +static void maybe_emit_filelist_progress(int count) +{ + if (INFO_GTE(FLIST, 2) && show_filelist_progress && (count % 100) == 0) + emit_filelist_progress(count); +} + +static void finish_filelist_progress(const struct file_list *flist) +{ + output_needs_newline = 0; + if (INFO_GTE(FLIST, 2)) { + /* This overwrites the progress line */ + rprintf(FINFO, "%d file%sto consider\n", + flist->used, flist->used == 1 ? " " : "s "); + } else { + rprintf(FINFO, "done\n"); + } +} + +void show_flist_stats(void) +{ + /* Nothing yet */ +} + +/* Stat either a symlink or its referent, depending on the settings of + * copy_links, copy_unsafe_links, etc. Returns -1 on error, 0 on success. + * + * If path is the name of a symlink, then the linkbuf buffer (which must hold + * MAXPATHLEN chars) will be set to the symlink's target string. + * + * The stat structure pointed to by stp will contain information about the + * link or the referent as appropriate, if they exist. */ +static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf) +{ +#ifdef SUPPORT_LINKS + if (link_stat(path, stp, copy_dirlinks) < 0) + return -1; + if (S_ISLNK(stp->st_mode)) { + int llen = do_readlink(path, linkbuf, MAXPATHLEN - 1); + if (llen < 0) + return -1; + linkbuf[llen] = '\0'; + if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) { + if (INFO_GTE(SYMSAFE, 1)) { + rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n", + path, linkbuf); + } + return x_stat(path, stp, NULL); + } + if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN + && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) { + memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN, + llen - SYMLINK_PREFIX_LEN + 1); + } + } + return 0; +#else + return x_stat(path, stp, NULL); +#endif +} + +int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks) +{ +#ifdef SUPPORT_LINKS + if (copy_links) + return x_stat(path, stp, NULL); + if (x_lstat(path, stp, NULL) < 0) + return -1; + if (follow_dirlinks && S_ISLNK(stp->st_mode)) { + STRUCT_STAT st; + if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode)) + *stp = st; + } + return 0; +#else + return x_stat(path, stp, NULL); +#endif +} + +static inline int path_is_daemon_excluded(char *path, int ignore_filename) +{ + if (daemon_filter_list.head) { + char *slash = path; + + while ((slash = strchr(slash+1, '/')) != NULL) { + int ret; + *slash = '\0'; + ret = check_filter(&daemon_filter_list, FLOG, path, 1); + *slash = '/'; + if (ret < 0) { + errno = ENOENT; + return 1; + } + } + + if (!ignore_filename + && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) { + errno = ENOENT; + return 1; + } + } + + return 0; +} + +static inline int is_excluded(const char *fname, int is_dir, int filter_level) +{ + return name_is_excluded(fname, is_dir ? NAME_IS_DIR : NAME_IS_FILE, filter_level); +} + +static void send_directory(int f, struct file_list *flist, + char *fbuf, int len, int flags); + +static const char *pathname, *orig_dir; +static int pathname_len; + +/* Make sure flist can hold at least flist->used + extra entries. */ +static void flist_expand(struct file_list *flist, int extra) +{ + struct file_struct **new_ptr; + + if (flist->used + extra <= flist->malloced) + return; + + if (flist->malloced < FLIST_START) + flist->malloced = FLIST_START; + else if (flist->malloced >= FLIST_LINEAR) + flist->malloced += FLIST_LINEAR; + else if (flist->malloced < FLIST_START_LARGE/16) + flist->malloced *= 4; + else + flist->malloced *= 2; + + /* In case count jumped or we are starting the list + * with a known size just set it. */ + if (flist->malloced < flist->used + extra) + flist->malloced = flist->used + extra; + + new_ptr = realloc_array(flist->files, struct file_struct *, flist->malloced); + + if (DEBUG_GTE(FLIST, 1) && flist->files) { + rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n", + who_am_i(), + big_num(sizeof flist->files[0] * flist->malloced), + (new_ptr == flist->files) ? " not" : ""); + } + + flist->files = new_ptr; +} + +static void flist_done_allocating(struct file_list *flist) +{ + void *ptr = pool_boundary(flist->file_pool, 8*1024); + if (flist->pool_boundary == ptr) + flist->pool_boundary = NULL; /* list didn't use any pool memory */ + else + flist->pool_boundary = ptr; +} + +/* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's + * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir, + * with dir == NULL taken to be the starting directory, and dirlen < 0 + * indicating that strdup(dir) should be called and then the -dirlen length + * value checked to ensure that it is not daemon-excluded. */ +int change_pathname(struct file_struct *file, const char *dir, int dirlen) +{ + if (dirlen < 0) { + char *cpy = strdup(dir); + if (*cpy != '/') + change_dir(orig_dir, CD_SKIP_CHDIR); + if (path_is_daemon_excluded(cpy, 0)) + goto chdir_error; + dir = cpy; + dirlen = -dirlen; + } else { + if (file) { + if (pathname == F_PATHNAME(file)) + return 1; + dir = F_PATHNAME(file); + if (dir) + dirlen = strlen(dir); + } else if (pathname == dir) + return 1; + if (dir && *dir != '/') + change_dir(orig_dir, CD_SKIP_CHDIR); + } + + pathname = dir; + pathname_len = dirlen; + + if (!dir) + dir = orig_dir; + + if (!change_dir(dir, CD_NORMAL)) { + chdir_error: + io_error |= IOERR_GENERAL; + rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir)); + if (dir != orig_dir) + change_dir(orig_dir, CD_NORMAL); + pathname = NULL; + pathname_len = 0; + return 0; + } + + return 1; +} + +static void send_file_entry(int f, const char *fname, struct file_struct *file, +#ifdef SUPPORT_LINKS + const char *symlink_name, int symlink_len, +#endif + int ndx, int first_ndx) +{ + static time_t modtime, atime; +#ifdef SUPPORT_CRTIMES + static time_t crtime; +#endif + static mode_t mode; +#ifdef SUPPORT_HARD_LINKS + static int64 dev; +#endif + static dev_t rdev; + static uint32 rdev_major; + static uid_t uid; + static gid_t gid; + static const char *user_name, *group_name; + static char lastname[MAXPATHLEN]; +#ifdef SUPPORT_HARD_LINKS + int first_hlink_ndx = -1; +#endif + int l1, l2; + int xflags; + + /* Initialize starting value of xflags and adjust counts. */ + if (S_ISREG(file->mode)) + xflags = 0; + else if (S_ISDIR(file->mode)) { + stats.num_dirs++; + if (protocol_version >= 30) { + if (file->flags & FLAG_CONTENT_DIR) + xflags = file->flags & FLAG_TOP_DIR; + else if (file->flags & FLAG_IMPLIED_DIR) + xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR; + else + xflags = XMIT_NO_CONTENT_DIR; + } else + xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */ + } else { + if (S_ISLNK(file->mode)) + stats.num_symlinks++; + else if (IS_DEVICE(file->mode)) + stats.num_devices++; + else if (IS_SPECIAL(file->mode)) + stats.num_specials++; + xflags = 0; + } + + if (file->mode == mode) + xflags |= XMIT_SAME_MODE; + else + mode = file->mode; + + if (preserve_devices && IS_DEVICE(mode)) { + if (protocol_version < 28) { + if (tmp_rdev == rdev) + xflags |= XMIT_SAME_RDEV_pre28; + else + rdev = tmp_rdev; + } else { + rdev = tmp_rdev; + if ((uint32)major(rdev) == rdev_major) + xflags |= XMIT_SAME_RDEV_MAJOR; + else + rdev_major = major(rdev); + if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu) + xflags |= XMIT_RDEV_MINOR_8_pre30; + } + } else if (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31) { + /* Special files don't need an rdev number, so just make + * the historical transmission of the value efficient. */ + if (protocol_version < 28) + xflags |= XMIT_SAME_RDEV_pre28; + else { + rdev = MAKEDEV(rdev_major, 0); + xflags |= XMIT_SAME_RDEV_MAJOR; + if (protocol_version < 30) + xflags |= XMIT_RDEV_MINOR_8_pre30; + } + } else if (protocol_version < 28) + rdev = MAKEDEV(0, 0); + if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname)) + xflags |= XMIT_SAME_UID; + else { + uid = F_OWNER(file); + if (!numeric_ids) { + user_name = add_uid(uid); + if (inc_recurse && user_name) + xflags |= XMIT_USER_NAME_FOLLOWS; + } + } + if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname)) + xflags |= XMIT_SAME_GID; + else { + gid = F_GROUP(file); + if (!numeric_ids) { + group_name = add_gid(gid); + if (inc_recurse && group_name) + xflags |= XMIT_GROUP_NAME_FOLLOWS; + } + } + if (file->modtime == modtime) + xflags |= XMIT_SAME_TIME; + else + modtime = file->modtime; + if (NSEC_BUMP(file) && protocol_version >= 31) + xflags |= XMIT_MOD_NSEC; + if (atimes_ndx && !S_ISDIR(mode)) { + if (F_ATIME(file) == atime) + xflags |= XMIT_SAME_ATIME; + else + atime = F_ATIME(file); + } +#ifdef SUPPORT_CRTIMES + if (crtimes_ndx) { + crtime = F_CRTIME(file); + if (crtime == modtime) + xflags |= XMIT_CRTIME_EQ_MTIME; + } +#endif + +#ifdef SUPPORT_HARD_LINKS + if (tmp_dev != -1) { + if (protocol_version >= 30) { + struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino); + first_hlink_ndx = (int32)(long)np->data; /* is -1 when new */ + if (first_hlink_ndx < 0) { + np->data = (void*)(long)(first_ndx + ndx); + xflags |= XMIT_HLINK_FIRST; + } + if (DEBUG_GTE(HLINK, 1)) { + if (first_hlink_ndx >= 0) { + rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n", + who_am_i(), first_ndx + ndx, first_hlink_ndx, + first_hlink_ndx >= first_ndx ? "" : "un"); + } else if (DEBUG_GTE(HLINK, 3)) { + rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n", + who_am_i(), first_ndx + ndx, + big_num(tmp_dev), big_num(tmp_ino)); + } + } + } else { + if (tmp_dev == dev) { + if (protocol_version >= 28) + xflags |= XMIT_SAME_DEV_pre30; + } else + dev = tmp_dev; + } + xflags |= XMIT_HLINKED; + } +#endif + + for (l1 = 0; + lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255); + l1++) {} + l2 = strlen(fname+l1); + + if (l1 > 0) + xflags |= XMIT_SAME_NAME; + if (l2 > 255) + xflags |= XMIT_LONG_NAME; + + /* We must avoid sending a flag value of 0 (or an initial byte of + * 0 for the older xflags protocol) or it will signal the end of + * the list. Note that the use of XMIT_TOP_DIR on a non-dir has + * no meaning, so it's a harmless way to add a bit to the first + * flag byte. */ + if (xfer_flags_as_varint) + write_varint(f, xflags ? xflags : XMIT_EXTENDED_FLAGS); + else if (protocol_version >= 28) { + if (!xflags && !S_ISDIR(mode)) + xflags |= XMIT_TOP_DIR; + if ((xflags & 0xFF00) || !xflags) { + xflags |= XMIT_EXTENDED_FLAGS; + write_shortint(f, xflags); + } else + write_byte(f, xflags); + } else { + if (!(xflags & 0xFF)) + xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR; + write_byte(f, xflags); + } + if (xflags & XMIT_SAME_NAME) + write_byte(f, l1); + if (xflags & XMIT_LONG_NAME) + write_varint30(f, l2); + else + write_byte(f, l2); + write_buf(f, fname + l1, l2); + +#ifdef SUPPORT_HARD_LINKS + if (first_hlink_ndx >= 0) { + write_varint(f, first_hlink_ndx); + if (first_hlink_ndx >= first_ndx) + goto the_end; + } +#endif + + write_varlong30(f, F_LENGTH(file), 3); + if (!(xflags & XMIT_SAME_TIME)) { + if (protocol_version >= 30) + write_varlong(f, modtime, 4); + else + write_int(f, modtime); + } + if (xflags & XMIT_MOD_NSEC) + write_varint(f, F_MOD_NSEC(file)); +#ifdef SUPPORT_CRTIMES + if (crtimes_ndx && !(xflags & XMIT_CRTIME_EQ_MTIME)) + write_varlong(f, crtime, 4); +#endif + if (!(xflags & XMIT_SAME_MODE)) + write_int(f, to_wire_mode(mode)); + if (atimes_ndx && !S_ISDIR(mode) && !(xflags & XMIT_SAME_ATIME)) + write_varlong(f, atime, 4); + if (preserve_uid && !(xflags & XMIT_SAME_UID)) { + if (protocol_version < 30) + write_int(f, uid); + else { + write_varint(f, uid); + if (xflags & XMIT_USER_NAME_FOLLOWS) { + int len = strlen(user_name); + write_byte(f, len); + write_buf(f, user_name, len); + } + } + } + if (preserve_gid && !(xflags & XMIT_SAME_GID)) { + if (protocol_version < 30) + write_int(f, gid); + else { + write_varint(f, gid); + if (xflags & XMIT_GROUP_NAME_FOLLOWS) { + int len = strlen(group_name); + write_byte(f, len); + write_buf(f, group_name, len); + } + } + } + if ((preserve_devices && IS_DEVICE(mode)) + || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) { + if (protocol_version < 28) { + if (!(xflags & XMIT_SAME_RDEV_pre28)) + write_int(f, (int)rdev); + } else { + if (!(xflags & XMIT_SAME_RDEV_MAJOR)) + write_varint30(f, major(rdev)); + if (protocol_version >= 30) + write_varint(f, minor(rdev)); + else if (xflags & XMIT_RDEV_MINOR_8_pre30) + write_byte(f, minor(rdev)); + else + write_int(f, minor(rdev)); + } + } + +#ifdef SUPPORT_LINKS + if (symlink_len) { + write_varint30(f, symlink_len); + write_buf(f, symlink_name, symlink_len); + } +#endif + +#ifdef SUPPORT_HARD_LINKS + if (tmp_dev != -1 && protocol_version < 30) { + /* Older protocols expect the dev number to be transmitted + * 1-incremented so that it is never zero. */ + if (protocol_version < 26) { + /* 32-bit dev_t and ino_t */ + write_int(f, (int32)(dev+1)); + write_int(f, (int32)tmp_ino); + } else { + /* 64-bit dev_t and ino_t */ + if (!(xflags & XMIT_SAME_DEV_pre30)) + write_longint(f, dev+1); + write_longint(f, tmp_ino); + } + } +#endif + + if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) { + const char *sum; + if (S_ISREG(mode)) + sum = tmp_sum; + else { + /* Prior to 28, we sent a useless set of nulls. */ + sum = empty_sum; + } + write_buf(f, sum, flist_csum_len); + } + +#ifdef SUPPORT_HARD_LINKS + the_end: +#endif + strlcpy(lastname, fname, MAXPATHLEN); + + if (S_ISREG(mode) || S_ISLNK(mode)) + stats.total_size += F_LENGTH(file); +} + +static struct file_struct *recv_file_entry(int f, struct file_list *flist, int xflags) +{ + static int64 modtime, atime; +#ifdef SUPPORT_CRTIMES + static time_t crtime; +#endif + static mode_t mode; +#ifdef SUPPORT_HARD_LINKS + static int64 dev; +#endif + static dev_t rdev; + static uint32 rdev_major; + static uid_t uid; + static gid_t gid; + static uint16 gid_flags; + static char lastname[MAXPATHLEN], *lastdir; + static int lastdir_depth, lastdir_len = -1; + static unsigned int del_hier_name_len = 0; + static int in_del_hier = 0; + char thisname[MAXPATHLEN]; + unsigned int l1 = 0, l2 = 0; + int alloc_len, basename_len, linkname_len; + int extra_len = file_extra_cnt * EXTRA_LEN; + int first_hlink_ndx = -1; + char real_ISREG_entry; + int64 file_length; +#ifdef CAN_SET_NSEC + uint32 modtime_nsec; +#endif + const char *basename; + struct file_struct *file; + alloc_pool_t *pool; + char *bp; + + if (xflags & XMIT_SAME_NAME) + l1 = read_byte(f); + + if (xflags & XMIT_LONG_NAME) + l2 = read_varint30(f); + else + l2 = read_byte(f); + + if (l2 >= MAXPATHLEN - l1) { + rprintf(FERROR, + "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n", + xflags, l1, l2, lastname, who_am_i()); + overflow_exit("recv_file_entry"); + } + + strlcpy(thisname, lastname, l1 + 1); + read_sbuf(f, &thisname[l1], l2); + thisname[l1 + l2] = 0; + + /* Abuse basename_len for a moment... */ + basename_len = strlcpy(lastname, thisname, MAXPATHLEN); + +#ifdef ICONV_OPTION + if (ic_recv != (iconv_t)-1) { + xbuf outbuf, inbuf; + + INIT_CONST_XBUF(outbuf, thisname); + INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1); + + if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) { + io_error |= IOERR_GENERAL; + rprintf(FERROR_UTF8, + "[%s] cannot convert filename: %s (%s)\n", + who_am_i(), lastname, strerror(errno)); + outbuf.len = 0; + } + thisname[outbuf.len] = '\0'; + } +#endif + + if (*thisname + && (clean_fname(thisname, CFN_REFUSE_DOT_DOT_DIRS) < 0 || (!relative_paths && *thisname == '/'))) { + rprintf(FERROR, "ABORTING due to unsafe pathname from sender: %s\n", thisname); + exit_cleanup(RERR_UNSUPPORTED); + } + + if (sanitize_paths) + sanitize_path(thisname, thisname, "", 0, SP_DEFAULT); + + if ((basename = strrchr(thisname, '/')) != NULL) { + int len = basename++ - thisname; + if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) { + lastdir = new_array(char, len + 1); + memcpy(lastdir, thisname, len); + lastdir[len] = '\0'; + lastdir_len = len; + lastdir_depth = count_dir_elements(lastdir); + } + } else + basename = thisname; + basename_len = strlen(basename) + 1; /* count the '\0' */ + +#ifdef SUPPORT_HARD_LINKS + if (protocol_version >= 30 + && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) { + first_hlink_ndx = read_varint(f); + if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) { + rprintf(FERROR, + "hard-link reference out of range: %d (%d)\n", + first_hlink_ndx, flist->ndx_start + flist->used); + exit_cleanup(RERR_PROTOCOL); + } + if (DEBUG_GTE(HLINK, 1)) { + rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n", + who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx, + first_hlink_ndx >= flist->ndx_start ? "" : "un"); + } + if (first_hlink_ndx >= flist->ndx_start) { + struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start]; + file_length = F_LENGTH(first); + modtime = first->modtime; +#ifdef CAN_SET_NSEC + modtime_nsec = F_MOD_NSEC_or_0(first); +#endif + mode = first->mode; + if (atimes_ndx && !S_ISDIR(mode)) + atime = F_ATIME(first); +#ifdef SUPPORT_CRTIMES + if (crtimes_ndx) + crtime = F_CRTIME(first); +#endif + if (preserve_uid) + uid = F_OWNER(first); + if (preserve_gid) + gid = F_GROUP(first); + if (preserve_devices && IS_DEVICE(mode)) { + uint32 *devp = F_RDEV_P(first); + rdev_major = DEV_MAJOR(devp); + rdev = MAKEDEV(rdev_major, DEV_MINOR(devp)); + extra_len += DEV_EXTRA_CNT * EXTRA_LEN; + } + if (preserve_links && S_ISLNK(mode)) + linkname_len = strlen(F_SYMLINK(first)) + 1; + else + linkname_len = 0; + real_ISREG_entry = S_ISREG(mode) ? 1 : 0; + goto create_object; + } + } +#endif + + file_length = read_varlong30(f, 3); + if (!(xflags & XMIT_SAME_TIME)) { + if (protocol_version >= 30) { + modtime = read_varlong(f, 4); +#if SIZEOF_TIME_T < SIZEOF_INT64 + if (!am_generator && (int64)(time_t)modtime != modtime) { + rprintf(FERROR_XFER, + "Time value of %s truncated on receiver.\n", + lastname); + } +#endif + } else + modtime = read_uint(f); + } + if (xflags & XMIT_MOD_NSEC) +#ifndef CAN_SET_NSEC + (void)read_varint(f); +#else + modtime_nsec = read_varint(f); + else + modtime_nsec = 0; +#endif +#ifdef SUPPORT_CRTIMES + if (crtimes_ndx) { + if (xflags & XMIT_CRTIME_EQ_MTIME) + crtime = modtime; + else + crtime = read_varlong(f, 4); +#if SIZEOF_TIME_T < SIZEOF_INT64 + if (!am_generator && (int64)(time_t)crtime != crtime) { + rprintf(FERROR_XFER, + "Create time value of %s truncated on receiver.\n", + lastname); + } +#endif + } +#endif + if (!(xflags & XMIT_SAME_MODE)) + mode = from_wire_mode(read_int(f)); + if (atimes_ndx && !S_ISDIR(mode) && !(xflags & XMIT_SAME_ATIME)) { + atime = read_varlong(f, 4); +#if SIZEOF_TIME_T < SIZEOF_INT64 + if (!am_generator && (int64)(time_t)atime != atime) { + rprintf(FERROR_XFER, + "Access time value of %s truncated on receiver.\n", + lastname); + } +#endif + } + + if (chmod_modes && !S_ISLNK(mode) && mode) + mode = tweak_mode(mode, chmod_modes); + + if (preserve_uid && !(xflags & XMIT_SAME_UID)) { + if (protocol_version < 30) + uid = (uid_t)read_int(f); + else { + uid = (uid_t)read_varint(f); + if (xflags & XMIT_USER_NAME_FOLLOWS) + uid = recv_user_name(f, uid); + else if (inc_recurse && am_root && (!numeric_ids || usermap)) + uid = match_uid(uid); + } + } + if (preserve_gid && !(xflags & XMIT_SAME_GID)) { + if (protocol_version < 30) + gid = (gid_t)read_int(f); + else { + gid = (gid_t)read_varint(f); + gid_flags = 0; + if (xflags & XMIT_GROUP_NAME_FOLLOWS) + gid = recv_group_name(f, gid, &gid_flags); + else if (inc_recurse && (!am_root || !numeric_ids || groupmap)) + gid = match_gid(gid, &gid_flags); + } + } + + if ((preserve_devices && IS_DEVICE(mode)) + || (preserve_specials && IS_SPECIAL(mode) && protocol_version < 31)) { + if (protocol_version < 28) { + if (!(xflags & XMIT_SAME_RDEV_pre28)) + rdev = (dev_t)read_int(f); + } else { + uint32 rdev_minor; + if (!(xflags & XMIT_SAME_RDEV_MAJOR)) + rdev_major = read_varint30(f); + if (protocol_version >= 30) + rdev_minor = read_varint(f); + else if (xflags & XMIT_RDEV_MINOR_8_pre30) + rdev_minor = read_byte(f); + else + rdev_minor = read_int(f); + rdev = MAKEDEV(rdev_major, rdev_minor); + } + if (IS_DEVICE(mode)) + extra_len += DEV_EXTRA_CNT * EXTRA_LEN; + file_length = 0; + } else if (protocol_version < 28) + rdev = MAKEDEV(0, 0); + +#ifdef SUPPORT_LINKS + if (preserve_links && S_ISLNK(mode)) { + linkname_len = read_varint30(f) + 1; /* count the '\0' */ + if (linkname_len <= 0 || linkname_len > MAXPATHLEN) { + rprintf(FERROR, "overflow: linkname_len=%d\n", + linkname_len - 1); + overflow_exit("recv_file_entry"); + } +#ifdef ICONV_OPTION + /* We don't know how much extra room we need to convert + * the as-yet-unread symlink data, so let's hope that a + * double-size buffer is plenty. */ + if (sender_symlink_iconv) + linkname_len *= 2; +#endif + if (munge_symlinks) + linkname_len += SYMLINK_PREFIX_LEN; + } + else +#endif + linkname_len = 0; + + if (copy_devices && IS_DEVICE(mode)) { + /* This is impossible in the official release, but some pre-release patches + * didn't convert the device into a file before sending, so we'll do it here + * (even though the length is typically 0 and any checksum data is zeros). */ + mode = S_IFREG | (mode & ACCESSPERMS); + modtime = time(NULL); /* The mtime on the device is not up-to-date, so set it to "now". */ + real_ISREG_entry = 0; + } else + real_ISREG_entry = S_ISREG(mode) ? 1 : 0; + +#ifdef SUPPORT_HARD_LINKS + create_object: + if (preserve_hard_links) { + if (protocol_version < 28 && real_ISREG_entry) + xflags |= XMIT_HLINKED; + if (xflags & XMIT_HLINKED) + extra_len += (inc_recurse+1) * EXTRA_LEN; + } +#endif + +#ifdef SUPPORT_ACLS + /* Directories need an extra int32 for the default ACL. */ + if (preserve_acls && S_ISDIR(mode)) + extra_len += EXTRA_LEN; +#endif + + if (always_checksum && S_ISREG(mode)) + extra_len += SUM_EXTRA_CNT * EXTRA_LEN; + +#if SIZEOF_INT64 >= 8 + if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) + extra_len += EXTRA_LEN; +#endif +#ifdef CAN_SET_NSEC + if (modtime_nsec) + extra_len += EXTRA_LEN; +#endif + if (file_length < 0) { + rprintf(FERROR, "Offset underflow: file-length is negative\n"); + exit_cleanup(RERR_UNSUPPORTED); + } + + if (*thisname == '/' ? thisname[1] != '.' || thisname[2] != '\0' : *thisname != '.' || thisname[1] != '\0') { + int filt_flags = S_ISDIR(mode) ? NAME_IS_DIR : NAME_IS_FILE; + if (!trust_sender_filter /* a per-dir filter rule means we must trust the sender's filtering */ + && filter_list.head && check_server_filter(&filter_list, FINFO, thisname, filt_flags) < 0) { + rprintf(FERROR, "ERROR: rejecting excluded file-list name: %s\n", thisname); + exit_cleanup(RERR_UNSUPPORTED); + } + if (implied_filter_list.head && check_filter(&implied_filter_list, FINFO, thisname, filt_flags) <= 0) { + rprintf(FERROR, "ERROR: rejecting unrequested file-list name: %s\n", thisname); + exit_cleanup(RERR_UNSUPPORTED); + } + } + + if (inc_recurse && S_ISDIR(mode)) { + if (one_file_system) { + /* Room to save the dir's device for -x */ + extra_len += DEV_EXTRA_CNT * EXTRA_LEN; + } + pool = dir_flist->file_pool; + } else + pool = flist->file_pool; + +#if EXTRA_ROUNDING > 0 + if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN)) + extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN; +#endif + + alloc_len = FILE_STRUCT_LEN + extra_len + basename_len + + linkname_len; + bp = pool_alloc(pool, alloc_len, "recv_file_entry"); + + memset(bp, 0, extra_len + FILE_STRUCT_LEN); + bp += extra_len; + file = (struct file_struct *)bp; + bp += FILE_STRUCT_LEN; + + memcpy(bp, basename, basename_len); + +#ifdef SUPPORT_HARD_LINKS + if (xflags & XMIT_HLINKED +#ifndef CAN_HARDLINK_SYMLINK + && !S_ISLNK(mode) +#endif +#ifndef CAN_HARDLINK_SPECIAL + && !IS_SPECIAL(mode) && !IS_DEVICE(mode) +#endif + ) + file->flags |= FLAG_HLINKED; +#endif + file->modtime = (time_t)modtime; +#ifdef CAN_SET_NSEC + if (modtime_nsec) { + file->flags |= FLAG_MOD_NSEC; + F_MOD_NSEC(file) = modtime_nsec; + } +#endif + file->len32 = (uint32)file_length; +#if SIZEOF_INT64 >= 8 + if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) { +#if SIZEOF_CAPITAL_OFF_T < 8 + rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n"); + exit_cleanup(RERR_UNSUPPORTED); +#else + file->flags |= FLAG_LENGTH64; + F_HIGH_LEN(file) = (uint32)(file_length >> 32); +#endif + } +#endif + file->mode = mode; + if (preserve_uid) + F_OWNER(file) = uid; + if (preserve_gid) { + F_GROUP(file) = gid; + file->flags |= gid_flags; + } + if (atimes_ndx && !S_ISDIR(mode)) + F_ATIME(file) = atime; +#ifdef SUPPORT_CRTIMES + if (crtimes_ndx) + F_CRTIME(file) = crtime; +#endif + if (unsort_ndx) + F_NDX(file) = flist->used + flist->ndx_start; + + if (basename != thisname) { + file->dirname = lastdir; + F_DEPTH(file) = lastdir_depth + 1; + } else + F_DEPTH(file) = 1; + + if (S_ISDIR(mode)) { + if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */ + F_DEPTH(file)--; + if (protocol_version >= 30) { + if (!(xflags & XMIT_NO_CONTENT_DIR)) { + if (xflags & XMIT_TOP_DIR) + file->flags |= FLAG_TOP_DIR; + file->flags |= FLAG_CONTENT_DIR; + } else if (xflags & XMIT_TOP_DIR) + file->flags |= FLAG_IMPLIED_DIR; + } else if (xflags & XMIT_TOP_DIR) { + in_del_hier = recurse; + del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2; + if (relative_paths && del_hier_name_len > 2 + && lastname[del_hier_name_len-1] == '.' + && lastname[del_hier_name_len-2] == '/') + del_hier_name_len -= 2; + file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR; + } else if (in_del_hier) { + if (!relative_paths || !del_hier_name_len + || (l1 >= del_hier_name_len + && lastname[del_hier_name_len] == '/')) + file->flags |= FLAG_CONTENT_DIR; + else + in_del_hier = 0; + } + } + + if (preserve_devices && IS_DEVICE(mode)) { + uint32 *devp = F_RDEV_P(file); + DEV_MAJOR(devp) = major(rdev); + DEV_MINOR(devp) = minor(rdev); + } + +#ifdef SUPPORT_LINKS + if (linkname_len) { + bp += basename_len; + if (first_hlink_ndx >= flist->ndx_start) { + struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start]; + memcpy(bp, F_SYMLINK(first), linkname_len); + } else { + if (munge_symlinks) { + strlcpy(bp, SYMLINK_PREFIX, linkname_len); + bp += SYMLINK_PREFIX_LEN; + linkname_len -= SYMLINK_PREFIX_LEN; + } +#ifdef ICONV_OPTION + if (sender_symlink_iconv) { + xbuf outbuf, inbuf; + + alloc_len = linkname_len; + linkname_len /= 2; + + /* Read the symlink data into the end of our double-sized + * buffer and then convert it into the right spot. */ + INIT_XBUF(inbuf, bp + alloc_len - linkname_len, + linkname_len - 1, (size_t)-1); + read_sbuf(f, inbuf.buf, inbuf.len); + INIT_XBUF(outbuf, bp, 0, alloc_len); + + if (iconvbufs(ic_recv, &inbuf, &outbuf, ICB_INIT) < 0) { + io_error |= IOERR_GENERAL; + rprintf(FERROR_XFER, + "[%s] cannot convert symlink data for: %s (%s)\n", + who_am_i(), full_fname(thisname), strerror(errno)); + bp = (char*)file->basename; + *bp++ = '\0'; + outbuf.len = 0; + } + bp[outbuf.len] = '\0'; + } else +#endif + read_sbuf(f, bp, linkname_len - 1); + if (sanitize_paths && !munge_symlinks && *bp) + sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT); + } + } +#endif + +#ifdef SUPPORT_HARD_LINKS + if (preserve_hard_links && xflags & XMIT_HLINKED) { + if (protocol_version >= 30) { + if (xflags & XMIT_HLINK_FIRST) { + F_HL_GNUM(file) = flist->ndx_start + flist->used; + } else + F_HL_GNUM(file) = first_hlink_ndx; + } else { + static int32 cnt = 0; + struct ht_int64_node *np; + int64 ino; + int32 ndx; + if (protocol_version < 26) { + dev = read_int(f); + ino = read_int(f); + } else { + if (!(xflags & XMIT_SAME_DEV_pre30)) + dev = read_longint(f); + ino = read_longint(f); + } + np = idev_find(dev, ino); + ndx = (int32)(long)np->data; /* is -1 when new */ + if (ndx < 0) { + np->data = (void*)(long)cnt; + ndx = cnt++; + } + F_HL_GNUM(file) = ndx; + } + } +#endif + + if (always_checksum && (real_ISREG_entry || protocol_version < 28)) { + if (real_ISREG_entry) + bp = F_SUM(file); + else { + /* Prior to 28, we get a useless set of nulls. */ + bp = tmp_sum; + } + if (first_hlink_ndx >= flist->ndx_start) { + struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start]; + memcpy(bp, F_SUM(first), flist_csum_len); + } else + read_buf(f, bp, flist_csum_len); + } + +#ifdef SUPPORT_ACLS + if (preserve_acls && !S_ISLNK(mode)) + receive_acl(f, file); +#endif +#ifdef SUPPORT_XATTRS + if (preserve_xattrs) + receive_xattr(f, file); +#endif + + if (S_ISREG(mode) || S_ISLNK(mode)) + stats.total_size += file_length; + + return file; +} + +/* Create a file_struct for a named file by reading its stat() information + * and performing extensive checks against global options. + * + * Returns a pointer to the new file struct, or NULL if there was an error + * or this file should be excluded. + * + * Note: Any error (here or in send_file_name) that results in the omission of + * an existent source file from the file list should set + * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the + * destination if --delete is on. */ +struct file_struct *make_file(const char *fname, struct file_list *flist, + STRUCT_STAT *stp, int flags, int filter_level) +{ + static char *lastdir; + static int lastdir_len = -1; + struct file_struct *file; + char thisname[MAXPATHLEN]; + char linkname[MAXPATHLEN]; + int alloc_len, basename_len, linkname_len; + int extra_len = file_extra_cnt * EXTRA_LEN; + const char *basename; + alloc_pool_t *pool; + STRUCT_STAT st; + char *bp; + + if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) { + io_error |= IOERR_GENERAL; + rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname); + return NULL; + } + clean_fname(thisname, 0); + if (sanitize_paths) + sanitize_path(thisname, thisname, "", 0, SP_DEFAULT); + + if (stp && (S_ISDIR(stp->st_mode) || IS_MISSING_FILE(*stp))) { + /* This is needed to handle a "symlink/." with a --relative + * dir, or a request to delete a specific file. */ + st = *stp; + *linkname = '\0'; /* make IBM code checker happy */ + } else if (readlink_stat(thisname, &st, linkname) != 0) { + int save_errno = errno; + /* See if file is excluded before reporting an error. */ + if (filter_level != NO_FILTERS + && (is_excluded(thisname, 0, filter_level) + || is_excluded(thisname, 1, filter_level))) { + if (ignore_perishable && save_errno != ENOENT) + non_perishable_cnt++; + return NULL; + } + if (save_errno == ENOENT) { +#ifdef SUPPORT_LINKS + /* When our options tell us to follow a symlink that + * points nowhere, tell the user about the symlink + * instead of giving a "vanished" message. We only + * dereference a symlink if one of the --copy*links + * options was specified, so there's no need for the + * extra lstat() if one of these options isn't on. */ + if ((copy_links || copy_unsafe_links || copy_dirlinks) + && x_lstat(thisname, &st, NULL) == 0 + && S_ISLNK(st.st_mode)) { + io_error |= IOERR_GENERAL; + rprintf(FERROR_XFER, "symlink has no referent: %s\n", + full_fname(thisname)); + } else +#endif + { + enum logcode c = am_daemon && protocol_version < 28 + ? FERROR : FWARNING; + io_error |= IOERR_VANISHED; + rprintf(c, "file has vanished: %s\n", + full_fname(thisname)); + } + } else { + io_error |= IOERR_GENERAL; + rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed", + full_fname(thisname)); + } + return NULL; + } else if (IS_MISSING_FILE(st)) { + io_error |= IOERR_GENERAL; + rprintf(FINFO, "skipping file with bogus (zero) st_mode: %s\n", + full_fname(thisname)); + return NULL; + } + + if (filter_level == NO_FILTERS) + goto skip_filters; + + if (S_ISDIR(st.st_mode)) { + if (!xfer_dirs) { + rprintf(FINFO, "skipping directory %s\n", thisname); + return NULL; + } + /* -x only affects dirs because we need to avoid recursing + * into a mount-point directory, not to avoid copying a + * symlinked file if -L (or similar) was specified. */ + if (one_file_system && st.st_dev != filesystem_dev + && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) { + if (one_file_system > 1) { + if (INFO_GTE(MOUNT, 1)) { + rprintf(FINFO, + "[%s] skipping mount-point dir %s\n", + who_am_i(), thisname); + } + return NULL; + } + flags |= FLAG_MOUNT_DIR; + flags &= ~FLAG_CONTENT_DIR; + } + } else + flags &= ~FLAG_CONTENT_DIR; + + if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) { + if (ignore_perishable) + non_perishable_cnt++; + return NULL; + } + + if (lp_ignore_nonreadable(module_id)) { +#ifdef SUPPORT_LINKS + if (!S_ISLNK(st.st_mode)) +#endif + if (access(thisname, R_OK) != 0) + return NULL; + } + + skip_filters: + + /* Only divert a directory in the main transfer. */ + if (flist) { + if (flist->prev && S_ISDIR(st.st_mode) + && flags & FLAG_DIVERT_DIRS) { + /* Room for parent/sibling/next-child info. */ + extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN; + if (relative_paths) + extra_len += PTR_EXTRA_CNT * EXTRA_LEN; + pool = dir_flist->file_pool; + } else + pool = flist->file_pool; + } else { +#ifdef SUPPORT_ACLS + /* Directories need an extra int32 for the default ACL. */ + if (preserve_acls && S_ISDIR(st.st_mode)) + extra_len += EXTRA_LEN; +#endif + pool = NULL; + } + + if (DEBUG_GTE(FLIST, 2)) { + rprintf(FINFO, "[%s] make_file(%s,*,%d)\n", + who_am_i(), thisname, filter_level); + } + + if ((basename = strrchr(thisname, '/')) != NULL) { + int len = basename++ - thisname; + if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) { + lastdir = new_array(char, len + 1); + memcpy(lastdir, thisname, len); + lastdir[len] = '\0'; + lastdir_len = len; + } + } else + basename = thisname; + basename_len = strlen(basename) + 1; /* count the '\0' */ + +#ifdef SUPPORT_LINKS + linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0; +#else + linkname_len = 0; +#endif + + if (copy_devices && am_sender && IS_DEVICE(st.st_mode)) { + if (st.st_size == 0) { + int fd = do_open(fname, O_RDONLY, 0); + if (fd >= 0) { + st.st_size = get_device_size(fd, fname); + close(fd); + } + } + st.st_mode = S_IFREG | (st.st_mode & ACCESSPERMS); + st.st_mtime = time(NULL); /* The mtime on the device is not up-to-date, so set it to "now". */ + } + +#ifdef ST_MTIME_NSEC + if (st.ST_MTIME_NSEC && protocol_version >= 31) + extra_len += EXTRA_LEN; +#endif +#if SIZEOF_CAPITAL_OFF_T >= 8 + if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) + extra_len += EXTRA_LEN; +#endif + + if (always_checksum && am_sender && S_ISREG(st.st_mode)) { + file_checksum(thisname, &st, tmp_sum); + if (sender_keeps_checksum) + extra_len += SUM_EXTRA_CNT * EXTRA_LEN; + } + +#if EXTRA_ROUNDING > 0 + if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN)) + extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN; +#endif + + alloc_len = FILE_STRUCT_LEN + extra_len + basename_len + + linkname_len; + if (pool) + bp = pool_alloc(pool, alloc_len, "make_file"); + else + bp = new_array(char, alloc_len); + + memset(bp, 0, extra_len + FILE_STRUCT_LEN); + bp += extra_len; + file = (struct file_struct *)bp; + bp += FILE_STRUCT_LEN; + + memcpy(bp, basename, basename_len); + +#ifdef SUPPORT_HARD_LINKS + if (preserve_hard_links && flist && flist->prev) { + if (protocol_version >= 28 + ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1) + : S_ISREG(st.st_mode)) { + tmp_dev = (int64)st.st_dev; + tmp_ino = (int64)st.st_ino; + } else + tmp_dev = -1; + } +#endif + +#ifdef HAVE_STRUCT_STAT_ST_RDEV + if (IS_DEVICE(st.st_mode)) { + tmp_rdev = st.st_rdev; + st.st_size = 0; + } else if (IS_SPECIAL(st.st_mode)) + st.st_size = 0; +#endif + + file->flags = flags; + file->modtime = st.st_mtime; +#ifdef ST_MTIME_NSEC + if (st.ST_MTIME_NSEC && protocol_version >= 31) { + file->flags |= FLAG_MOD_NSEC; + F_MOD_NSEC(file) = st.ST_MTIME_NSEC; + } +#endif + file->len32 = (uint32)st.st_size; +#if SIZEOF_CAPITAL_OFF_T >= 8 + if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) { + file->flags |= FLAG_LENGTH64; + F_HIGH_LEN(file) = (uint32)(st.st_size >> 32); + } +#endif + file->mode = st.st_mode; + if (preserve_uid) + F_OWNER(file) = st.st_uid; + if (preserve_gid) + F_GROUP(file) = st.st_gid; + if (am_generator && st.st_uid == our_uid) + file->flags |= FLAG_OWNED_BY_US; + if (atimes_ndx && !S_ISDIR(file->mode)) + F_ATIME(file) = st.st_atime; +#ifdef SUPPORT_CRTIMES + if (crtimes_ndx) + F_CRTIME(file) = get_create_time(fname, &st); +#endif + + if (basename != thisname) + file->dirname = lastdir; + +#ifdef SUPPORT_LINKS + if (linkname_len) + memcpy(bp + basename_len, linkname, linkname_len); +#endif + + if (am_sender) + F_PATHNAME(file) = pathname; + else if (!pool) + F_DEPTH(file) = extra_len / EXTRA_LEN; + + if (basename_len == 0+1) { + if (!pool) + unmake_file(file); + return NULL; + } + + if (sender_keeps_checksum && S_ISREG(st.st_mode)) + memcpy(F_SUM(file), tmp_sum, flist_csum_len); + + if (unsort_ndx) + F_NDX(file) = stats.num_dirs; + + return file; +} + +OFF_T get_device_size(int fd, const char *fname) +{ + OFF_T off = lseek(fd, 0, SEEK_END); + + if (off == (OFF_T) -1) { + rsyserr(FERROR, errno, "failed to get device size via seek: %s", fname); + return 0; + } + if (lseek(fd, 0, SEEK_SET) != 0) + rsyserr(FERROR, errno, "failed to seek device back to start: %s", fname); + + return off; +} + +/* Only called for temporary file_struct entries created by make_file(). */ +void unmake_file(struct file_struct *file) +{ + free(REQ_EXTRA(file, F_DEPTH(file))); +} + +static struct file_struct *send_file_name(int f, struct file_list *flist, + const char *fname, STRUCT_STAT *stp, + int flags, int filter_level) +{ + struct file_struct *file; + + file = make_file(fname, flist, stp, flags, filter_level); + if (!file) + return NULL; + + if (chmod_modes && !S_ISLNK(file->mode) && file->mode) + file->mode = tweak_mode(file->mode, chmod_modes); + + if (f >= 0) { + char fbuf[MAXPATHLEN]; +#ifdef SUPPORT_LINKS + const char *symlink_name; + int symlink_len; +#ifdef ICONV_OPTION + char symlink_buf[MAXPATHLEN]; +#endif +#endif +#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS + stat_x sx; + init_stat_x(&sx); +#endif + +#ifdef SUPPORT_LINKS + if (preserve_links && S_ISLNK(file->mode)) { + symlink_name = F_SYMLINK(file); + symlink_len = strlen(symlink_name); + if (symlink_len == 0) { + io_error |= IOERR_GENERAL; + f_name(file, fbuf); + rprintf(FERROR_XFER, + "skipping symlink with 0-length value: %s\n", + full_fname(fbuf)); + return NULL; + } + } else { + symlink_name = NULL; + symlink_len = 0; + } +#endif + +#ifdef ICONV_OPTION + if (ic_send != (iconv_t)-1) { + xbuf outbuf, inbuf; + + INIT_CONST_XBUF(outbuf, fbuf); + + if (file->dirname) { + INIT_XBUF_STRLEN(inbuf, (char*)file->dirname); + outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */ + if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) + goto convert_error; + outbuf.size += 2; + fbuf[outbuf.len++] = '/'; + } + + INIT_XBUF_STRLEN(inbuf, (char*)file->basename); + if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) { + convert_error: + io_error |= IOERR_GENERAL; + rprintf(FERROR_XFER, + "[%s] cannot convert filename: %s (%s)\n", + who_am_i(), f_name(file, fbuf), strerror(errno)); + return NULL; + } + fbuf[outbuf.len] = '\0'; + +#ifdef SUPPORT_LINKS + if (symlink_len && sender_symlink_iconv) { + INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1); + INIT_CONST_XBUF(outbuf, symlink_buf); + if (iconvbufs(ic_send, &inbuf, &outbuf, ICB_INIT) < 0) { + io_error |= IOERR_GENERAL; + f_name(file, fbuf); + rprintf(FERROR_XFER, + "[%s] cannot convert symlink data for: %s (%s)\n", + who_am_i(), full_fname(fbuf), strerror(errno)); + return NULL; + } + symlink_buf[outbuf.len] = '\0'; + + symlink_name = symlink_buf; + symlink_len = outbuf.len; + } +#endif + } else +#endif + f_name(file, fbuf); + +#ifdef SUPPORT_ACLS + if (preserve_acls && !S_ISLNK(file->mode)) { + sx.st.st_mode = file->mode; + if (get_acl(fname, &sx) < 0) { + io_error |= IOERR_GENERAL; + return NULL; + } + } +#endif +#ifdef SUPPORT_XATTRS + if (preserve_xattrs) { + sx.st.st_mode = file->mode; + if (get_xattr(fname, &sx) < 0) { + io_error |= IOERR_GENERAL; + return NULL; + } + } +#endif + + send_file_entry(f, fbuf, file, +#ifdef SUPPORT_LINKS + symlink_name, symlink_len, +#endif + flist->used, flist->ndx_start); + +#ifdef SUPPORT_ACLS + if (preserve_acls && !S_ISLNK(file->mode)) { + send_acl(f, &sx); + free_acl(&sx); + } +#endif +#ifdef SUPPORT_XATTRS + if (preserve_xattrs) { + F_XATTR(file) = send_xattr(f, &sx); + free_xattr(&sx); + } +#endif + } + + maybe_emit_filelist_progress(flist->used + flist_count_offset); + + flist_expand(flist, 1); + flist->files[flist->used++] = file; + + return file; +} + +static void send_if_directory(int f, struct file_list *flist, + struct file_struct *file, + char *fbuf, unsigned int ol, + int flags) +{ + char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/'); + + if (S_ISDIR(file->mode) + && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) { + void *save_filters; + unsigned int len = strlen(fbuf); + if (len > 1 && fbuf[len-1] == '/') + fbuf[--len] = '\0'; + save_filters = push_local_filters(fbuf, len); + send_directory(f, flist, fbuf, len, flags); + pop_local_filters(save_filters); + fbuf[ol] = '\0'; + if (is_dot_dir) + fbuf[ol-1] = '.'; + } +} + +static int file_compare(const void *file1, const void *file2) +{ + return f_name_cmp(*(struct file_struct **)file1, + *(struct file_struct **)file2); +} + +/* The guts of a merge-sort algorithm. This was derived from the glibc + * version, but I (Wayne) changed the merge code to do less copying and + * to require only half the amount of temporary memory. */ +static void fsort_tmp(struct file_struct **fp, size_t num, + struct file_struct **tmp) +{ + struct file_struct **f1, **f2, **t; + size_t n1, n2; + + n1 = num / 2; + n2 = num - n1; + f1 = fp; + f2 = fp + n1; + + if (n1 > 1) + fsort_tmp(f1, n1, tmp); + if (n2 > 1) + fsort_tmp(f2, n2, tmp); + + while (f_name_cmp(*f1, *f2) <= 0) { + if (!--n1) + return; + f1++; + } + + t = tmp; + memcpy(t, f1, n1 * PTR_SIZE); + + *f1++ = *f2++, n2--; + + while (n1 > 0 && n2 > 0) { + if (f_name_cmp(*t, *f2) <= 0) + *f1++ = *t++, n1--; + else + *f1++ = *f2++, n2--; + } + + if (n1 > 0) + memcpy(f1, t, n1 * PTR_SIZE); +} + +/* This file-struct sorting routine makes sure that any identical names in + * the file list stay in the same order as they were in the original list. + * This is particularly vital in inc_recurse mode where we expect a sort + * on the flist to match the exact order of a sort on the dir_flist. */ +static void fsort(struct file_struct **fp, size_t num) +{ + if (num <= 1) + return; + + if (use_qsort) + qsort(fp, num, PTR_SIZE, file_compare); + else { + struct file_struct **tmp = new_array(struct file_struct *, (num+1) / 2); + fsort_tmp(fp, num, tmp); + free(tmp); + } +} + +/* We take an entire set of sibling dirs from the sorted flist and link them + * into the tree, setting the appropriate parent/child/sibling pointers. */ +static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist, + int dir_cnt) +{ + int i; + int32 *dp = NULL; + int32 *parent_dp = parent_ndx < 0 ? NULL + : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]); + + /* The sending side is adding entries to dir_flist in sorted order, so sorted & files are the same. */ + flist_expand(dir_flist, dir_cnt); + dir_flist->sorted = dir_flist->files; + + for (i = 0; dir_cnt; i++) { + struct file_struct *file = from_flist->sorted[i]; + + if (!S_ISDIR(file->mode)) + continue; + + dir_flist->files[dir_flist->used++] = file; + dir_cnt--; + + if (file->basename[0] == '.' && file->basename[1] == '\0') + continue; + + if (dp) + DIR_NEXT_SIBLING(dp) = dir_flist->used - 1; + else if (parent_dp) + DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1; + else + send_dir_ndx = dir_flist->used - 1; + + dp = F_DIR_NODE_P(file); + DIR_PARENT(dp) = parent_ndx; + DIR_FIRST_CHILD(dp) = -1; + } + if (dp) + DIR_NEXT_SIBLING(dp) = -1; +} + +static void interpret_stat_error(const char *fname, int is_dir) +{ + if (errno == ENOENT) { + io_error |= IOERR_VANISHED; + rprintf(FWARNING, "%s has vanished: %s\n", + is_dir ? "directory" : "file", full_fname(fname)); + } else { + io_error |= IOERR_GENERAL; + rsyserr(FERROR_XFER, errno, "link_stat %s failed", + full_fname(fname)); + } +} + +/* This function is normally called by the sender, but the receiving side also + * calls it from get_dirlist() with f set to -1 so that we just construct the + * file list in memory without sending it over the wire. Also, get_dirlist() + * might call this with f set to -2, which also indicates that local filter + * rules should be ignored. */ +static void send_directory(int f, struct file_list *flist, char *fbuf, int len, + int flags) +{ + struct dirent *di; + unsigned remainder; + char *p; + DIR *d; + int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0; + int start = flist->used; + int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS; + + assert(flist != NULL); + + if (!(d = opendir(fbuf))) { + if (errno == ENOENT) { + if (am_sender) /* Can abuse this for vanished error w/ENOENT: */ + interpret_stat_error(fbuf, True); + return; + } + if (errno == ENOTDIR && (flags & FLAG_PERHAPS_DIR)) + return; + io_error |= IOERR_GENERAL; + rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf)); + return; + } + + p = fbuf + len; + if (len == 1 && *fbuf == '/') + remainder = MAXPATHLEN - 1; + else if (len < MAXPATHLEN-1) { + *p++ = '/'; + *p = '\0'; + remainder = MAXPATHLEN - (len + 1); + } else + remainder = 0; + + for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) { + unsigned name_len; + char *dname = d_name(di); + if (dname[0] == '.' && (dname[1] == '\0' + || (dname[1] == '.' && dname[2] == '\0'))) + continue; + name_len = strlcpy(p, dname, remainder); + if (name_len >= remainder) { + char save = fbuf[len]; + fbuf[len] = '\0'; + io_error |= IOERR_GENERAL; + rprintf(FERROR_XFER, + "filename overflows max-path len by %u: %s/%s\n", + name_len - remainder + 1, fbuf, dname); + fbuf[len] = save; + continue; + } + if (dname[0] == '\0') { + io_error |= IOERR_GENERAL; + rprintf(FERROR_XFER, + "cannot send file with empty name in %s\n", + full_fname(fbuf)); + continue; + } + + send_file_name(f, flist, fbuf, NULL, flags, filter_level); + } + + fbuf[len] = '\0'; + + if (errno) { + io_error |= IOERR_GENERAL; + rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf)); + } + + closedir(d); + + if (f >= 0 && recurse && !divert_dirs) { + int i, end = flist->used - 1; + /* send_if_directory() bumps flist->used, so use "end". */ + for (i = start; i <= end; i++) + send_if_directory(f, flist, flist->files[i], fbuf, len, flags); + } +} + +static void send_implied_dirs(int f, struct file_list *flist, char *fname, + char *start, char *limit, int flags, char name_type) +{ + static char lastpath[MAXPATHLEN] = ""; + static int lastpath_len = 0; + static struct file_struct *lastpath_struct = NULL; + struct file_struct *file; + item_list *relname_list; + relnamecache **rnpp; + int len, need_new_dir, depth = 0; + filter_rule_list save_filter_list = filter_list; + + flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR); + filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */ + + if (inc_recurse) { + if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname + && lastpath_len == limit - fname + && strncmp(lastpath, fname, lastpath_len) == 0) + need_new_dir = 0; + else + need_new_dir = 1; + } else { + char *tp = fname, *lp = lastpath; + /* Skip any initial directories in our path that we + * have in common with lastpath. */ + assert(start == fname); + for ( ; ; tp++, lp++) { + if (tp == limit) { + if (*lp == '/' || *lp == '\0') + goto done; + break; + } + if (*lp != *tp) + break; + if (*tp == '/') { + start = tp; + depth++; + } + } + need_new_dir = 1; + } + + if (need_new_dir) { + int save_copy_links = copy_links; + int save_xfer_dirs = xfer_dirs; + char *slash; + + copy_links = xfer_dirs = 1; + + *limit = '\0'; + + for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) { + *slash = '\0'; + file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS); + depth++; + if (!inc_recurse && file && S_ISDIR(file->mode)) + change_local_filter_dir(fname, strlen(fname), depth); + *slash = '/'; + } + + file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS); + if (inc_recurse) { + if (file && !S_ISDIR(file->mode)) + file = NULL; + lastpath_struct = file; + } else if (file && S_ISDIR(file->mode)) + change_local_filter_dir(fname, strlen(fname), ++depth); + + strlcpy(lastpath, fname, sizeof lastpath); + lastpath_len = limit - fname; + + *limit = '/'; + + copy_links = save_copy_links; + xfer_dirs = save_xfer_dirs; + + if (!inc_recurse) + goto done; + } + + if (!lastpath_struct) + goto done; /* dir must have vanished */ + + len = strlen(limit+1); + memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list); + if (!relname_list) { + relname_list = new0(item_list); + memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list); + } + rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32); + *rnpp = (relnamecache*)new_array(char, RELNAMECACHE_LEN + len + 1); + (*rnpp)->name_type = name_type; + strlcpy((*rnpp)->fname, limit+1, len + 1); + +done: + filter_list = save_filter_list; +} + +static NORETURN void fatal_unsafe_io_error(void) +{ + /* This (sadly) can only happen when pushing data because + * the sender does not know about what kind of delete + * is in effect on the receiving side when pulling. */ + rprintf(FERROR_XFER, "FATAL I/O ERROR: dying to avoid a --delete-%s issue with a pre-3.0.7 receiver.\n", + delete_during == 2 ? "delay" : "during"); + exit_cleanup(RERR_UNSUPPORTED); +} + +static void send1extra(int f, struct file_struct *file, struct file_list *flist) +{ + char fbuf[MAXPATHLEN]; + item_list *relname_list; + int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR; + size_t j; + + f_name(file, fbuf); + dlen = strlen(fbuf); + + if (!change_pathname(file, NULL, 0)) + exit_cleanup(RERR_FILESELECT); + + change_local_filter_dir(fbuf, dlen, send_dir_depth); + + if (file->flags & FLAG_CONTENT_DIR) { + if (one_file_system) { + STRUCT_STAT st; + if (link_stat(fbuf, &st, copy_dirlinks) != 0) { + interpret_stat_error(fbuf, True); + return; + } + filesystem_dev = st.st_dev; + } + send_directory(f, flist, fbuf, dlen, flags); + } + + if (!relative_paths) + return; + + memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list); + if (!relname_list) + return; + + for (j = 0; j < relname_list->count; j++) { + char *slash; + relnamecache *rnp = ((relnamecache**)relname_list->items)[j]; + char name_type = rnp->name_type; + + fbuf[dlen] = '/'; + len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1); + free(rnp); + if (len >= (int)sizeof fbuf) + continue; /* Impossible... */ + + slash = strchr(fbuf+dlen+1, '/'); + if (slash) { + send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type); + continue; + } + + if (name_type != NORMAL_NAME) { + STRUCT_STAT st; + if (name_type == MISSING_NAME) + memset(&st, 0, sizeof st); + else if (link_stat(fbuf, &st, 1) != 0) { + interpret_stat_error(fbuf, True); + continue; + } + send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS); + } else + send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS); + } + + free(relname_list); +} + +static void write_end_of_flist(int f, int send_io_error) +{ + if (xfer_flags_as_varint) { + write_varint(f, 0); + write_varint(f, send_io_error ? io_error : 0); + } else if (send_io_error) { + write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST); + write_varint(f, io_error); + } else + write_byte(f, 0); +} + +void send_extra_file_list(int f, int at_least) +{ + struct file_list *flist; + int64 start_write; + uint16 prev_flags; + int save_io_error = io_error; + + if (flist_eof) + return; + + if (at_least < 0) + at_least = file_total - file_old_total + 1; + + /* Keep sending data until we have the requested number of + * files in the upcoming file-lists. */ + while (file_total - file_old_total < at_least) { + struct file_struct *file = dir_flist->sorted[send_dir_ndx]; + int dir_ndx, dstart = stats.num_dirs; + const char *pathname = F_PATHNAME(file); + int32 *dp; + + flist = flist_new(0, "send_extra_file_list"); + start_write = stats.total_written; + + if (unsort_ndx) + dir_ndx = F_NDX(file); + else + dir_ndx = send_dir_ndx; + write_ndx(f, NDX_FLIST_OFFSET - dir_ndx); + flist->parent_ndx = send_dir_ndx; /* the sending side must remember the sorted ndx value */ + + send1extra(f, file, flist); + prev_flags = file->flags; + dp = F_DIR_NODE_P(file); + + /* If there are any duplicate directory names that follow, we + * send all the dirs together in one file-list. The dir_flist + * tree links all the child subdirs onto the last dup dir. */ + while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0 + && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) { + send_dir_ndx = dir_ndx; + file = dir_flist->sorted[dir_ndx]; + /* Try to avoid some duplicate scanning of identical dirs. */ + if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR) + file->flags &= ~FLAG_CONTENT_DIR; + send1extra(f, file, flist); + prev_flags = file->flags; + dp = F_DIR_NODE_P(file); + } + + if (io_error == save_io_error || ignore_errors) + write_end_of_flist(f, 0); + else if (use_safe_inc_flist) + write_end_of_flist(f, 1); + else { + if (delete_during) + fatal_unsafe_io_error(); + write_end_of_flist(f, 0); + } + + if (need_unsorted_flist) { + flist->sorted = new_array(struct file_struct *, flist->used); + memcpy(flist->sorted, flist->files, flist->used * PTR_SIZE); + } else + flist->sorted = flist->files; + + flist_sort_and_clean(flist, 0); + + add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart); + flist_done_allocating(flist); + + file_total += flist->used; + stats.flist_size += stats.total_written - start_write; + stats.num_files += flist->used; + if (DEBUG_GTE(FLIST, 3)) + output_flist(flist); + + if (DIR_FIRST_CHILD(dp) >= 0) { + send_dir_ndx = DIR_FIRST_CHILD(dp); + send_dir_depth++; + } else { + while (DIR_NEXT_SIBLING(dp) < 0) { + if ((send_dir_ndx = DIR_PARENT(dp)) < 0) { + write_ndx(f, NDX_FLIST_EOF); + flist_eof = 1; + if (DEBUG_GTE(FLIST, 3)) + rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); + change_local_filter_dir(NULL, 0, 0); + goto finish; + } + send_dir_depth--; + file = dir_flist->sorted[send_dir_ndx]; + dp = F_DIR_NODE_P(file); + } + send_dir_ndx = DIR_NEXT_SIBLING(dp); + } + } + + finish: + if (io_error != save_io_error && protocol_version == 30 && !ignore_errors) + send_msg_int(MSG_IO_ERROR, io_error); +} + +struct file_list *send_file_list(int f, int argc, char *argv[]) +{ + static const char *lastdir; + static int lastdir_len = -1; + int len, dirlen; + STRUCT_STAT st; + char *p, *dir; + struct file_list *flist; + struct timeval start_tv, end_tv; + int64 start_write; + int use_ff_fd = 0; + int disable_buffering, reenable_multiplex = -1; + int flags = recurse ? FLAG_CONTENT_DIR : 0; + int reading_remotely = filesfrom_host != NULL; + int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS) +#ifdef ICONV_OPTION + | (filesfrom_convert ? RL_CONVERT : 0) +#endif + | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0); + int implied_dot_dir = 0; + + rprintf(FLOG, "building file list\n"); + if (show_filelist_progress) + start_filelist_progress("building file list"); + else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server) + rprintf(FCLIENT, "sending incremental file list\n"); + + start_write = stats.total_written; + gettimeofday(&start_tv, NULL); + + if (relative_paths && protocol_version >= 30) + implied_dirs = 1; /* We send flagged implied dirs */ + +#ifdef SUPPORT_HARD_LINKS + if (preserve_hard_links && protocol_version >= 30 && !cur_flist) + init_hard_links(); +#endif + + flist = cur_flist = flist_new(0, "send_file_list"); + flist_expand(flist, FLIST_START_LARGE); + if (inc_recurse) { + dir_flist = flist_new(FLIST_TEMP, "send_file_list"); + flist_expand(dir_flist, FLIST_START_LARGE); + flags |= FLAG_DIVERT_DIRS; + } else + dir_flist = cur_flist; + + disable_buffering = io_start_buffering_out(f); + if (filesfrom_fd >= 0) { + if (argv[0] && !change_dir(argv[0], CD_NORMAL)) { + rsyserr(FERROR_XFER, errno, "change_dir %s failed", + full_fname(argv[0])); + exit_cleanup(RERR_FILESELECT); + } + if (protocol_version < 31) { + /* Older protocols send the files-from data w/o packaging + * it in multiplexed I/O packets, so temporarily switch + * to buffered I/O to match this behavior. */ + reenable_multiplex = io_end_multiplex_in(MPLX_TO_BUFFERED); + } + use_ff_fd = 1; + } + + if (!orig_dir) + orig_dir = strdup(curr_dir); + + while (1) { + char fbuf[MAXPATHLEN], *fn, name_type; + + if (use_ff_fd) { + if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0) + break; + sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS); + } else { + if (argc-- == 0) + break; + strlcpy(fbuf, *argv++, MAXPATHLEN); + if (sanitize_paths) + sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS); + } + + len = strlen(fbuf); + if (relative_paths) { + /* We clean up fbuf below. */ + name_type = NORMAL_NAME; + } else if (!len || fbuf[len - 1] == '/') { + if (len == 2 && fbuf[0] == '.') { + /* Turn "./" into just "." rather than "./." */ + fbuf[--len] = '\0'; + } else { + if (len + 1 >= MAXPATHLEN) + overflow_exit("send_file_list"); + fbuf[len++] = '.'; + fbuf[len] = '\0'; + } + name_type = DOTDIR_NAME; + } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.' + && (len == 2 || fbuf[len-3] == '/')) { + if (len + 2 >= MAXPATHLEN) + overflow_exit("send_file_list"); + fbuf[len++] = '/'; + fbuf[len++] = '.'; + fbuf[len] = '\0'; + name_type = DOTDIR_NAME; + } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/')) + name_type = DOTDIR_NAME; + else + name_type = NORMAL_NAME; + + dir = NULL; + + if (!relative_paths) { + p = strrchr(fbuf, '/'); + if (p) { + *p = '\0'; + if (p == fbuf) + dir = "/"; + else + dir = fbuf; + len -= p - fbuf + 1; + fn = p + 1; + } else + fn = fbuf; + } else { + if ((p = strstr(fbuf, "/./")) != NULL) { + *p = '\0'; + if (p == fbuf) + dir = "/"; + else { + dir = fbuf; + clean_fname(dir, 0); + } + fn = p + 3; + while (*fn == '/') + fn++; + if (!*fn) + *--fn = '\0'; /* ensure room for '.' */ + } else + fn = fbuf; + /* A leading ./ can be used in relative mode to affect + * the dest dir without its name being in the path. */ + if (*fn == '.' && fn[1] == '/' && fn[2] && !implied_dot_dir) + implied_dot_dir = -1; + len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH + | CFN_DROP_TRAILING_DOT_DIR); + if (len == 1) { + if (fn[0] == '/') { + fn = "/."; + len = 2; + name_type = DOTDIR_NAME; + } else if (fn[0] == '.') + name_type = DOTDIR_NAME; + } else if (fn[len-1] == '/') { + fn[--len] = '\0'; + if (len == 1 && *fn == '.') + name_type = DOTDIR_NAME; + else + name_type = SLASH_ENDING_NAME; + } + /* Reject a ".." dir in the active part of the path. */ + for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) { + if ((p[2] == '/' || p[2] == '\0') + && (p == fn || p[-1] == '/')) { + rprintf(FERROR, + "found \"..\" dir in relative path: %s\n", + fn); + exit_cleanup(RERR_SYNTAX); + } + } + } + + if (!*fn) { + len = 1; + fn = "."; + name_type = DOTDIR_NAME; + } + + dirlen = dir ? strlen(dir) : 0; + if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) { + if (!change_pathname(NULL, dir, -dirlen)) + goto bad_path; + lastdir = pathname; + lastdir_len = pathname_len; + } else if (!change_pathname(NULL, lastdir, lastdir_len)) { + bad_path: + if (implied_dot_dir < 0) + implied_dot_dir = 0; + continue; + } + + if (implied_dot_dir < 0) { + implied_dot_dir = 1; + send_file_name(f, flist, ".", NULL, (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR, ALL_FILTERS); + } + + if (fn != fbuf) + memmove(fbuf, fn, len + 1); + + if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0 + || (name_type != DOTDIR_NAME && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, SERVER_FILTERS)) + || (relative_paths && path_is_daemon_excluded(fbuf, 1))) { + if (errno != ENOENT || missing_args == 0) { + /* This is a transfer error, but inhibit deletion + * only if we might be omitting an existing file. */ + if (errno != ENOENT) + io_error |= IOERR_GENERAL; + rsyserr(FERROR_XFER, errno, "link_stat %s failed", + full_fname(fbuf)); + continue; + } else if (missing_args == 1) { + /* Just ignore the arg. */ + continue; + } else /* (missing_args == 2) */ { + /* Send the arg as a "missing" entry with + * mode 0, which tells the generator to delete it. */ + memset(&st, 0, sizeof st); + } + } + + /* A dot-dir should not be excluded! */ + if (name_type != DOTDIR_NAME && st.st_mode != 0 + && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS)) + continue; + + if (S_ISDIR(st.st_mode) && !xfer_dirs) { + rprintf(FINFO, "skipping directory %s\n", fbuf); + continue; + } + + if (inc_recurse && relative_paths && *fbuf) { + if ((p = strchr(fbuf+1, '/')) != NULL) { + if (p - fbuf == 1 && *fbuf == '.') { + if ((fn = strchr(p+1, '/')) != NULL) + p = fn; + } else + fn = p; + send_implied_dirs(f, flist, fbuf, fbuf, p, flags, + IS_MISSING_FILE(st) ? MISSING_NAME : name_type); + if (fn == p) + continue; + } + } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) { + /* Send the implied directories at the start of the + * source spec, so we get their permissions right. */ + send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0); + } + + if (one_file_system) + filesystem_dev = st.st_dev; + + if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) { + struct file_struct *file; + file = send_file_name(f, flist, fbuf, &st, + FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags, + NO_FILTERS); + if (!file) + continue; + if (inc_recurse) { + if (name_type == DOTDIR_NAME) { + if (send_dir_depth < 0) { + send_dir_depth = 0; + change_local_filter_dir(fbuf, len, send_dir_depth); + } + send_directory(f, flist, fbuf, len, flags); + } + } else + send_if_directory(f, flist, file, fbuf, len, flags); + } else + send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS); + } + + if (reenable_multiplex >= 0) + io_start_multiplex_in(reenable_multiplex); + + gettimeofday(&end_tv, NULL); + stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000 + + (end_tv.tv_usec - start_tv.tv_usec) / 1000; + if (stats.flist_buildtime == 0) + stats.flist_buildtime = 1; + start_tv = end_tv; + + /* Indicate end of file list */ + if (io_error == 0 || ignore_errors) + write_end_of_flist(f, 0); + else if (use_safe_inc_flist) + write_end_of_flist(f, 1); + else { + if (delete_during && inc_recurse) + fatal_unsafe_io_error(); + write_end_of_flist(f, 0); + } + +#ifdef SUPPORT_HARD_LINKS + if (preserve_hard_links && protocol_version >= 30 && !inc_recurse) + idev_destroy(); +#endif + + if (show_filelist_progress) + finish_filelist_progress(flist); + + gettimeofday(&end_tv, NULL); + stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000 + + (end_tv.tv_usec - start_tv.tv_usec) / 1000; + + /* When converting names, both sides keep an unsorted file-list array + * because the names will differ on the sending and receiving sides + * (both sides will use the unsorted index number for each item). */ + + /* Sort the list without removing any duplicates. This allows the + * receiving side to ask for whatever name it kept. For incremental + * recursion mode, the sender marks duplicate dirs so that it can + * send them together in a single file-list. */ + if (need_unsorted_flist) { + flist->sorted = new_array(struct file_struct *, flist->used); + memcpy(flist->sorted, flist->files, flist->used * PTR_SIZE); + } else + flist->sorted = flist->files; + flist_sort_and_clean(flist, 0); + file_total += flist->used; + file_old_total += flist->used; + + if (numeric_ids <= 0 && !inc_recurse) + send_id_lists(f); + + /* send the io_error flag */ + if (protocol_version < 30) + write_int(f, ignore_errors ? 0 : io_error); + else if (!use_safe_inc_flist && io_error && !ignore_errors) + send_msg_int(MSG_IO_ERROR, io_error); + + if (disable_buffering) + io_end_buffering_out(IOBUF_FREE_BUFS); + + stats.flist_size = stats.total_written - start_write; + stats.num_files = flist->used; + + if (DEBUG_GTE(FLIST, 3)) + output_flist(flist); + + if (DEBUG_GTE(FLIST, 2)) + rprintf(FINFO, "send_file_list done\n"); + + if (inc_recurse) { + send_dir_depth = 1; + add_dirs_to_tree(-1, flist, stats.num_dirs); + if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0) + flist->parent_ndx = -1; + flist_done_allocating(flist); + if (send_dir_ndx < 0) { + write_ndx(f, NDX_FLIST_EOF); + flist_eof = 1; + if (DEBUG_GTE(FLIST, 3)) + rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); + } + else if (file_total == 1) { + /* If we're creating incremental file-lists and there + * was just 1 item in the first file-list, send 1 more + * file-list to check if this is a 1-file xfer. */ + send_extra_file_list(f, 1); + } + } else { + flist_eof = 1; + if (DEBUG_GTE(FLIST, 3)) + rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); + } + + return flist; +} + +struct file_list *recv_file_list(int f, int dir_ndx) +{ + const char *good_dirname = NULL; + struct file_list *flist; + int dstart, flags; + int64 start_read; + + if (!first_flist) { + if (show_filelist_progress) + start_filelist_progress("receiving file list"); + else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server) + rprintf(FCLIENT, "receiving incremental file list\n"); + rprintf(FLOG, "receiving file list\n"); + if (usermap) + parse_name_map(usermap, True); + if (groupmap) + parse_name_map(groupmap, False); + } + + start_read = stats.total_read; + +#ifdef SUPPORT_HARD_LINKS + if (preserve_hard_links && !first_flist) + init_hard_links(); +#endif + + flist = flist_new(0, "recv_file_list"); + flist_expand(flist, FLIST_START_LARGE); + + if (inc_recurse) { + if (flist->ndx_start == 1) { + dir_flist = flist_new(FLIST_TEMP, "recv_file_list"); + flist_expand(dir_flist, FLIST_START_LARGE); + } + dstart = dir_flist->used; + } else { + dir_flist = flist; + dstart = 0; + } + + while (1) { + struct file_struct *file; + + if (xfer_flags_as_varint) { + if ((flags = read_varint(f)) == 0) { + int err = read_varint(f); + if (!ignore_errors) + io_error |= err; + break; + } + } else { + if ((flags = read_byte(f)) == 0) + break; + + if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS)) + flags |= read_byte(f) << 8; + + if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) { + int err; + if (!use_safe_inc_flist) { + rprintf(FERROR, "Invalid flist flag: %x\n", flags); + exit_cleanup(RERR_PROTOCOL); + } + err = read_varint(f); + if (!ignore_errors) + io_error |= err; + break; + } + } + + flist_expand(flist, 1); + file = recv_file_entry(f, flist, flags); + + if (inc_recurse) { + static const char empty_dir[] = "\0"; + const char *cur_dir = file->dirname ? file->dirname : empty_dir; + if (relative_paths && *cur_dir == '/') + cur_dir++; + if (cur_dir != good_dirname) { + const char *d = dir_ndx >= 0 ? f_name(dir_flist->files[dir_ndx], NULL) : empty_dir; + if (strcmp(cur_dir, d) != 0) { + rprintf(FERROR, + "ABORTING due to invalid path from sender: %s/%s\n", + cur_dir, file->basename); + exit_cleanup(RERR_UNSUPPORTED); + } + good_dirname = cur_dir; + } + } + + if (S_ISREG(file->mode)) { + /* Already counted */ + } else if (S_ISDIR(file->mode)) { + if (inc_recurse) { + flist_expand(dir_flist, 1); + dir_flist->files[dir_flist->used++] = file; + } + stats.num_dirs++; + } else if (S_ISLNK(file->mode)) + stats.num_symlinks++; + else if (IS_DEVICE(file->mode)) + stats.num_symlinks++; + else + stats.num_specials++; + + flist->files[flist->used++] = file; + + maybe_emit_filelist_progress(flist->used); + + if (DEBUG_GTE(FLIST, 2)) { + char *name = f_name(file, NULL); + rprintf(FINFO, "recv_file_name(%s)\n", NS(name)); + } + } + file_total += flist->used; + + if (DEBUG_GTE(FLIST, 2)) + rprintf(FINFO, "received %d names\n", flist->used); + + if (show_filelist_progress) + finish_filelist_progress(flist); + + if (need_unsorted_flist) { + /* Create an extra array of index pointers that we can sort for + * the generator's use (for wading through the files in sorted + * order and for calling flist_find()). We keep the "files" + * list unsorted for our exchange of index numbers with the + * other side (since their names may not sort the same). */ + flist->sorted = new_array(struct file_struct *, flist->used); + memcpy(flist->sorted, flist->files, flist->used * PTR_SIZE); + if (inc_recurse && dir_flist->used > dstart) { + static int dir_flist_malloced = 0; + if (dir_flist_malloced < dir_flist->malloced) { + dir_flist->sorted = realloc_array(dir_flist->sorted, + struct file_struct *, + dir_flist->malloced); + dir_flist_malloced = dir_flist->malloced; + } + memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart, + (dir_flist->used - dstart) * PTR_SIZE); + fsort(dir_flist->sorted + dstart, dir_flist->used - dstart); + } + } else { + flist->sorted = flist->files; + if (inc_recurse && dir_flist->used > dstart) { + dir_flist->sorted = dir_flist->files; + fsort(dir_flist->sorted + dstart, dir_flist->used - dstart); + } + } + + if (inc_recurse) + flist_done_allocating(flist); + else if (f >= 0) { + recv_id_list(f, flist); + flist_eof = 1; + if (DEBUG_GTE(FLIST, 3)) + rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); + } + + /* The --relative option sends paths with a leading slash, so we need + * to specify the strip_root option here. We rejected leading slashes + * for a non-relative transfer in recv_file_entry(). */ + flist_sort_and_clean(flist, relative_paths); + + if (protocol_version < 30) { + /* Recv the io_error flag */ + int err = read_int(f); + if (!ignore_errors) + io_error |= err; + } else if (inc_recurse && flist->ndx_start == 1) { + if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0) + flist->parent_ndx = -1; + } + + if (DEBUG_GTE(FLIST, 3)) + output_flist(flist); + + if (DEBUG_GTE(FLIST, 2)) + rprintf(FINFO, "recv_file_list done\n"); + + stats.flist_size += stats.total_read - start_read; + stats.num_files += flist->used; + + return flist; +} + +/* This is only used once by the receiver if the very first file-list + * has exactly one item in it. */ +void recv_additional_file_list(int f) +{ + struct file_list *flist; + int ndx = read_ndx(f); + if (ndx == NDX_FLIST_EOF) { + flist_eof = 1; + if (DEBUG_GTE(FLIST, 3)) + rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); + change_local_filter_dir(NULL, 0, 0); + } else { + ndx = NDX_FLIST_OFFSET - ndx; + if (ndx < 0 || ndx >= dir_flist->used) { + ndx = NDX_FLIST_OFFSET - ndx; + rprintf(FERROR, + "[%s] Invalid dir index: %d (%d - %d)\n", + who_am_i(), ndx, NDX_FLIST_OFFSET, + NDX_FLIST_OFFSET - dir_flist->used + 1); + exit_cleanup(RERR_PROTOCOL); + } + if (DEBUG_GTE(FLIST, 3)) { + rprintf(FINFO, "[%s] receiving flist for dir %d\n", + who_am_i(), ndx); + } + flist = recv_file_list(f, ndx); + flist->parent_ndx = ndx; + } +} + +/* Search for an identically-named item in the file list. Note that the + * items must agree in their directory-ness, or no match is returned. */ +int flist_find(struct file_list *flist, struct file_struct *f) +{ + int low = flist->low, high = flist->high; + int diff, mid, mid_up; + + while (low <= high) { + mid = (low + high) / 2; + if (F_IS_ACTIVE(flist->sorted[mid])) + mid_up = mid; + else { + /* Scan for the next non-empty entry using the cached + * distance values. If the value isn't fully up-to- + * date, update it. */ + mid_up = mid + F_DEPTH(flist->sorted[mid]); + if (!F_IS_ACTIVE(flist->sorted[mid_up])) { + do { + mid_up += F_DEPTH(flist->sorted[mid_up]); + } while (!F_IS_ACTIVE(flist->sorted[mid_up])); + F_DEPTH(flist->sorted[mid]) = mid_up - mid; + } + if (mid_up > high) { + /* If there's nothing left above us, set high to + * a non-empty entry below us and continue. */ + high = mid - (int)flist->sorted[mid]->len32; + if (!F_IS_ACTIVE(flist->sorted[high])) { + do { + high -= (int)flist->sorted[high]->len32; + } while (!F_IS_ACTIVE(flist->sorted[high])); + flist->sorted[mid]->len32 = mid - high; + } + continue; + } + } + diff = f_name_cmp(flist->sorted[mid_up], f); + if (diff == 0) { + if (protocol_version < 29 + && S_ISDIR(flist->sorted[mid_up]->mode) + != S_ISDIR(f->mode)) + return -1; + return mid_up; + } + if (diff < 0) + low = mid_up + 1; + else + high = mid - 1; + } + return -1; +} + +/* Search for a name in the file list. You must specify want_dir_match as: + * 1=match directories, 0=match non-directories, or -1=match either. */ +int flist_find_name(struct file_list *flist, const char *fname, int want_dir_match) +{ + static struct file_struct *f; + char fbuf[MAXPATHLEN]; + const char *slash = strrchr(fname, '/'); + const char *basename = slash ? slash+1 : fname; + + if (!f) + f = (struct file_struct*)new_array(char, FILE_STRUCT_LEN + MAXPATHLEN + 1); + + memset(f, 0, FILE_STRUCT_LEN); + memcpy((void*)f->basename, basename, strlen(basename)+1); + + if (slash) { + strlcpy(fbuf, fname, slash - fname + 1); + f->dirname = fbuf; + } else + f->dirname = NULL; + + f->mode = want_dir_match > 0 ? S_IFDIR : S_IFREG; + + if (want_dir_match < 0) + return flist_find_ignore_dirness(flist, f); + return flist_find(flist, f); +} + +/* Search for an identically-named item in the file list. Differs from + * flist_find in that an item that agrees with "f" in directory-ness is + * preferred but one that does not is still found. */ +int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f) +{ + mode_t save_mode; + int ndx; + + /* First look for an item that agrees in directory-ness. */ + ndx = flist_find(flist, f); + if (ndx >= 0) + return ndx; + + /* Temporarily flip f->mode to look for an item of opposite + * directory-ness. */ + save_mode = f->mode; + f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR; + ndx = flist_find(flist, f); + f->mode = save_mode; + return ndx; +} + +/* + * Free up any resources a file_struct has allocated + * and clear the file. + */ +void clear_file(struct file_struct *file) +{ + /* The +1 zeros out the first char of the basename. */ + memset(file, 0, FILE_STRUCT_LEN + 1); + /* In an empty entry, F_DEPTH() is an offset to the next non-empty + * entry. Likewise for len32 in the opposite direction. We assume + * that we're alone for now since flist_find() will adjust the counts + * it runs into that aren't up-to-date. */ + file->len32 = F_DEPTH(file) = 1; +} + +/* Allocate a new file list. */ +static struct file_list *flist_new(int flags, const char *msg) +{ + struct file_list *flist; + + flist = new0(struct file_list); + + if (flags & FLIST_TEMP) { + if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0, _out_of_memory, POOL_INTERN))) + out_of_memory(msg); + } else { + /* This is a doubly linked list with prev looping back to + * the end of the list, but the last next pointer is NULL. */ + if (!first_flist) { + if (!(flist->file_pool = pool_create(NORMAL_EXTENT, 0, _out_of_memory, POOL_INTERN))) + out_of_memory(msg); + + flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0; + + first_flist = cur_flist = flist->prev = flist; + } else { + struct file_list *prev = first_flist->prev; + + flist->file_pool = first_flist->file_pool; + + flist->ndx_start = prev->ndx_start + prev->used + 1; + flist->flist_num = prev->flist_num + 1; + + flist->prev = prev; + prev->next = first_flist->prev = flist; + } + flist->pool_boundary = pool_boundary(flist->file_pool, 0); + flist_cnt++; + } + + return flist; +} + +/* Free up all elements in a flist. */ +void flist_free(struct file_list *flist) +{ + if (!flist->prev) { + /* Was FLIST_TEMP dir-list. */ + } else if (flist == flist->prev) { + first_flist = cur_flist = NULL; + file_total = 0; + flist_cnt = 0; + } else { + if (flist == cur_flist) + cur_flist = flist->next; + if (flist == first_flist) + first_flist = first_flist->next; + else { + flist->prev->next = flist->next; + if (!flist->next) + flist->next = first_flist; + } + flist->next->prev = flist->prev; + file_total -= flist->used; + flist_cnt--; + } + + if (!flist->prev || !flist_cnt) + pool_destroy(flist->file_pool); + else + pool_free_old(flist->file_pool, flist->pool_boundary); + + if (flist->sorted && flist->sorted != flist->files) + free(flist->sorted); + free(flist->files); + free(flist); +} + +/* This routine ensures we don't have any duplicate names in our file list. + * duplicate names can cause corruption because of the pipelining. */ +static void flist_sort_and_clean(struct file_list *flist, int strip_root) +{ + char fbuf[MAXPATHLEN]; + int i, prev_i; + + if (!flist) + return; + if (flist->used == 0) { + flist->high = -1; + flist->low = 0; + return; + } + + fsort(flist->sorted, flist->used); + + if (!am_sender || inc_recurse) { + for (i = prev_i = 0; i < flist->used; i++) { + if (F_IS_ACTIVE(flist->sorted[i])) { + prev_i = i; + break; + } + } + flist->low = prev_i; + } else { + i = prev_i = flist->used - 1; + flist->low = 0; + } + + while (++i < flist->used) { + int j; + struct file_struct *file = flist->sorted[i]; + + if (!F_IS_ACTIVE(file)) + continue; + if (f_name_cmp(file, flist->sorted[prev_i]) == 0) + j = prev_i; + else if (protocol_version >= 29 && S_ISDIR(file->mode)) { + int save_mode = file->mode; + /* Make sure that this directory doesn't duplicate a + * non-directory earlier in the list. */ + flist->high = prev_i; + file->mode = S_IFREG; + j = flist_find(flist, file); + file->mode = save_mode; + } else + j = -1; + if (j >= 0) { + int keep, drop; + /* If one is a dir and the other is not, we want to + * keep the dir because it might have contents in the + * list. Otherwise keep the first one. */ + if (S_ISDIR(file->mode)) { + struct file_struct *fp = flist->sorted[j]; + if (!S_ISDIR(fp->mode)) + keep = i, drop = j; + else { + if (am_sender) + file->flags |= FLAG_DUPLICATE; + else { /* Make sure we merge our vital flags. */ + fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR); + fp->flags &= file->flags | ~FLAG_IMPLIED_DIR; + } + keep = j, drop = i; + } + } else + keep = j, drop = i; + + if (!am_sender) { + if (DEBUG_GTE(DUP, 1)) { + rprintf(FINFO, + "removing duplicate name %s from file list (%d)\n", + f_name(file, fbuf), drop + flist->ndx_start); + } + clear_file(flist->sorted[drop]); + } + + if (keep == i) { + if (flist->low == drop) { + for (j = drop + 1; + j < i && !F_IS_ACTIVE(flist->sorted[j]); + j++) {} + flist->low = j; + } + prev_i = i; + } + } else + prev_i = i; + } + flist->high = prev_i; + + if (strip_root) { + /* We need to strip off the leading slashes for relative + * paths, but this must be done _after_ the sorting phase. */ + for (i = flist->low; i <= flist->high; i++) { + struct file_struct *file = flist->sorted[i]; + + if (!file->dirname) + continue; + while (*file->dirname == '/') + file->dirname++; + if (!*file->dirname) + file->dirname = NULL; + } + } + + if (prune_empty_dirs && !am_sender) { + int j, prev_depth = 0; + + prev_i = 0; /* It's OK that this isn't really true. */ + + for (i = flist->low; i <= flist->high; i++) { + struct file_struct *fp, *file = flist->sorted[i]; + + /* This temporarily abuses the F_DEPTH() value for a + * directory that is in a chain that might get pruned. + * We restore the old value if it gets a reprieve. */ + if (S_ISDIR(file->mode) && F_DEPTH(file)) { + /* Dump empty dirs when coming back down. */ + for (j = prev_depth; j >= F_DEPTH(file); j--) { + fp = flist->sorted[prev_i]; + if (F_DEPTH(fp) >= 0) + break; + prev_i = -F_DEPTH(fp)-1; + clear_file(fp); + } + prev_depth = F_DEPTH(file); + if (is_excluded(f_name(file, fbuf), 1, ALL_FILTERS)) { + /* Keep dirs through this dir. */ + for (j = prev_depth-1; ; j--) { + fp = flist->sorted[prev_i]; + if (F_DEPTH(fp) >= 0) + break; + prev_i = -F_DEPTH(fp)-1; + F_DEPTH(fp) = j; + } + } else + F_DEPTH(file) = -prev_i-1; + prev_i = i; + } else { + /* Keep dirs through this non-dir. */ + for (j = prev_depth; ; j--) { + fp = flist->sorted[prev_i]; + if (F_DEPTH(fp) >= 0) + break; + prev_i = -F_DEPTH(fp)-1; + F_DEPTH(fp) = j; + } + } + } + /* Dump all remaining empty dirs. */ + while (1) { + struct file_struct *fp = flist->sorted[prev_i]; + if (F_DEPTH(fp) >= 0) + break; + prev_i = -F_DEPTH(fp)-1; + clear_file(fp); + } + + for (i = flist->low; i <= flist->high; i++) { + if (F_IS_ACTIVE(flist->sorted[i])) + break; + } + flist->low = i; + for (i = flist->high; i >= flist->low; i--) { + if (F_IS_ACTIVE(flist->sorted[i])) + break; + } + flist->high = i; + } +} + +static void output_flist(struct file_list *flist) +{ + char uidbuf[16], gidbuf[16], depthbuf[16]; + struct file_struct *file; + const char *root, *dir, *slash, *name, *trail; + const char *who = who_am_i(); + int i; + + rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n", + who, flist->ndx_start, flist->used, flist->low, flist->high); + for (i = 0; i < flist->used; i++) { + file = flist->files[i]; + if ((am_root || am_sender) && uid_ndx) { + snprintf(uidbuf, sizeof uidbuf, " uid=%u", + F_OWNER(file)); + } else + *uidbuf = '\0'; + if (gid_ndx) { + static char parens[] = "(\0)\0\0\0"; + char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3); + snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s", + pp, F_GROUP(file), pp + 2); + } else + *gidbuf = '\0'; + if (!am_sender) + snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file)); + if (F_IS_ACTIVE(file)) { + root = am_sender ? NS(F_PATHNAME(file)) : depthbuf; + if ((dir = file->dirname) == NULL) + dir = slash = ""; + else + slash = "/"; + name = file->basename; + trail = S_ISDIR(file->mode) ? "/" : ""; + } else + root = dir = slash = name = trail = ""; + rprintf(FINFO, + "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n", + who, i + flist->ndx_start, + root, dir, slash, name, trail, + (int)file->mode, comma_num(F_LENGTH(file)), + uidbuf, gidbuf, file->flags); + } +} + +enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING }; +enum fnc_type { t_PATH, t_ITEM }; + +static int found_prefix; + +/* Compare the names of two file_struct entities, similar to how strcmp() + * would do if it were operating on the joined strings. + * + * Some differences beginning with protocol_version 29: (1) directory names + * are compared with an assumed trailing slash so that they compare in a + * way that would cause them to sort immediately prior to any content they + * may have; (2) a directory of any name compares after a non-directory of + * any name at the same depth; (3) a directory with name "." compares prior + * to anything else. These changes mean that a directory and a non-dir + * with the same name will not compare as equal (protocol_version >= 29). + * + * The dirname component can be an empty string, but the basename component + * cannot (and never is in the current codebase). The basename component + * may be NULL (for a removed item), in which case it is considered to be + * after any existing item. */ +int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2) +{ + int dif; + const uchar *c1, *c2; + enum fnc_state state1, state2; + enum fnc_type type1, type2; + enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM; + + if (!f1 || !F_IS_ACTIVE(f1)) { + if (!f2 || !F_IS_ACTIVE(f2)) + return 0; + return -1; + } + if (!f2 || !F_IS_ACTIVE(f2)) + return 1; + + c1 = (uchar*)f1->dirname; + c2 = (uchar*)f2->dirname; + if (c1 == c2) + c1 = c2 = NULL; + if (!c1) { + type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM; + c1 = (const uchar*)f1->basename; + if (type1 == t_PATH && *c1 == '.' && !c1[1]) { + type1 = t_ITEM; + state1 = s_TRAILING; + c1 = (uchar*)""; + } else + state1 = s_BASE; + } else { + type1 = t_path; + state1 = s_DIR; + } + if (!c2) { + type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM; + c2 = (const uchar*)f2->basename; + if (type2 == t_PATH && *c2 == '.' && !c2[1]) { + type2 = t_ITEM; + state2 = s_TRAILING; + c2 = (uchar*)""; + } else + state2 = s_BASE; + } else { + type2 = t_path; + state2 = s_DIR; + } + + if (type1 != type2) + return type1 == t_PATH ? 1 : -1; + + do { + if (!*c1) { + switch (state1) { + case s_DIR: + state1 = s_SLASH; + c1 = (uchar*)"/"; + break; + case s_SLASH: + type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM; + c1 = (const uchar*)f1->basename; + if (type1 == t_PATH && *c1 == '.' && !c1[1]) { + type1 = t_ITEM; + state1 = s_TRAILING; + c1 = (uchar*)""; + } else + state1 = s_BASE; + break; + case s_BASE: + state1 = s_TRAILING; + if (type1 == t_PATH) { + c1 = (uchar*)"/"; + break; + } + /* FALL THROUGH */ + case s_TRAILING: + type1 = t_ITEM; + break; + } + if (*c2 && type1 != type2) + return type1 == t_PATH ? 1 : -1; + } + if (!*c2) { + switch (state2) { + case s_DIR: + state2 = s_SLASH; + c2 = (uchar*)"/"; + break; + case s_SLASH: + type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM; + c2 = (const uchar*)f2->basename; + if (type2 == t_PATH && *c2 == '.' && !c2[1]) { + type2 = t_ITEM; + state2 = s_TRAILING; + c2 = (uchar*)""; + } else + state2 = s_BASE; + break; + case s_BASE: + state2 = s_TRAILING; + if (type2 == t_PATH) { + c2 = (uchar*)"/"; + break; + } + /* FALL THROUGH */ + case s_TRAILING: + found_prefix = 1; + if (!*c1) + return 0; + type2 = t_ITEM; + break; + } + if (type1 != type2) + return type1 == t_PATH ? 1 : -1; + } + } while ((dif = (int)*c1++ - (int)*c2++) == 0); + + return dif; +} + +/* Returns 1 if f1's filename has all of f2's filename as a prefix. This does + * not match if f2's basename is not an exact match of a path element in f1. + * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */ +int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2) +{ + found_prefix = 0; + f_name_cmp(f1, f2); + return found_prefix; +} + +char *f_name_buf(void) +{ + static char names[5][MAXPATHLEN]; + static unsigned int n; + + n = (n + 1) % (sizeof names / sizeof names[0]); + + return names[n]; +} + +/* Return a copy of the full filename of a flist entry, using the indicated + * buffer or one of 5 static buffers if fbuf is NULL. No size-checking is + * done because we checked the size when creating the file_struct entry. + */ +char *f_name(const struct file_struct *f, char *fbuf) +{ + if (!f || !F_IS_ACTIVE(f)) + return NULL; + + if (!fbuf) + fbuf = f_name_buf(); + + if (f->dirname) { + int len = strlen(f->dirname); + memcpy(fbuf, f->dirname, len); + fbuf[len] = '/'; + strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1)); + } else + strlcpy(fbuf, f->basename, MAXPATHLEN); + + return fbuf; +} + +/* Do a non-recursive scan of the named directory, possibly ignoring all + * exclude rules except for the daemon's. If "dlen" is >=0, it is the length + * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN + * buffer (the functions we call will append names onto the end, but the old + * dir value will be restored on exit). */ +struct file_list *get_dirlist(char *dirname, int dlen, int flags) +{ + struct file_list *dirlist; + char dirbuf[MAXPATHLEN]; + int save_recurse = recurse; + int save_xfer_dirs = xfer_dirs; + int save_prune_empty_dirs = prune_empty_dirs; + int senddir_fd = flags & GDL_IGNORE_FILTER_RULES ? -2 : -1; + int senddir_flags = FLAG_CONTENT_DIR; + + if (dlen < 0) { + dlen = strlcpy(dirbuf, dirname, MAXPATHLEN); + if (dlen >= MAXPATHLEN) + return NULL; + dirname = dirbuf; + } + + dirlist = flist_new(FLIST_TEMP, "get_dirlist"); + + if (flags & GDL_PERHAPS_DIR) + senddir_flags |= FLAG_PERHAPS_DIR; + + recurse = 0; + xfer_dirs = 1; + send_directory(senddir_fd, dirlist, dirname, dlen, senddir_flags); + xfer_dirs = save_xfer_dirs; + recurse = save_recurse; + if (INFO_GTE(PROGRESS, 1)) + flist_count_offset += dirlist->used; + + prune_empty_dirs = 0; + dirlist->sorted = dirlist->files; + flist_sort_and_clean(dirlist, 0); + prune_empty_dirs = save_prune_empty_dirs; + + if (DEBUG_GTE(FLIST, 3)) + output_flist(dirlist); + + return dirlist; +} |