diff options
Diffstat (limited to 'rsync.c')
| -rw-r--r-- | rsync.c | 828 |
1 files changed, 828 insertions, 0 deletions
@@ -0,0 +1,828 @@ +/* + * Routines common to more than one of the rsync processes. + * + * Copyright (C) 1996 Andrew Tridgell + * Copyright (C) 1996 Paul Mackerras + * Copyright (C) 2003-2022 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" +#if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET +#include <libcharset.h> +#elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO +#include <langinfo.h> +#endif + +extern int dry_run; +extern int preserve_acls; +extern int preserve_xattrs; +extern int preserve_perms; +extern int preserve_executability; +extern int preserve_mtimes; +extern int omit_dir_times; +extern int omit_link_times; +extern int am_root; +extern int am_server; +extern int am_daemon; +extern int am_sender; +extern int am_receiver; +extern int am_generator; +extern int am_starting_up; +extern int allow_8bit_chars; +extern int protocol_version; +extern int got_kill_signal; +extern int called_from_signal_handler; +extern int inc_recurse; +extern int inplace; +extern int flist_eof; +extern int file_old_total; +extern int keep_dirlinks; +extern int make_backups; +extern int sanitize_paths; +extern struct file_list *cur_flist, *first_flist, *dir_flist; +extern struct chmod_mode_struct *daemon_chmod_modes; +#ifdef ICONV_OPTION +extern char *iconv_opt; +#endif + +#define UPDATED_OWNER (1<<0) +#define UPDATED_GROUP (1<<1) +#define UPDATED_MTIME (1<<2) +#define UPDATED_ATIME (1<<3) +#define UPDATED_ACLS (1<<4) +#define UPDATED_MODE (1<<5) +#define UPDATED_CRTIME (1<<6) + +#ifdef ICONV_CONST +iconv_t ic_chck = (iconv_t)-1; +# ifdef ICONV_OPTION +iconv_t ic_send = (iconv_t)-1, ic_recv = (iconv_t)-1; +# endif + +static const char *default_charset(void) +{ +# if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET + return locale_charset(); +# elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO + return nl_langinfo(CODESET); +# else + return ""; /* Works with (at the very least) gnu iconv... */ +# endif +} + +void setup_iconv(void) +{ + const char *defset = default_charset(); +# ifdef ICONV_OPTION + const char *charset; + char *cp; +# endif + + if (!am_server && !allow_8bit_chars) { + /* It's OK if this fails... */ + ic_chck = iconv_open(defset, defset); + + if (DEBUG_GTE(ICONV, 2)) { + if (ic_chck == (iconv_t)-1) { + rprintf(FINFO, + "msg checking via isprint()" + " (iconv_open(\"%s\", \"%s\") errno: %d)\n", + defset, defset, errno); + } else { + rprintf(FINFO, + "msg checking charset: %s\n", + defset); + } + } + } else + ic_chck = (iconv_t)-1; + +# ifdef ICONV_OPTION + if (!iconv_opt) + return; + + if ((cp = strchr(iconv_opt, ',')) != NULL) { + if (am_server) /* A local transfer needs this. */ + iconv_opt = cp + 1; + else + *cp = '\0'; + } + + if (!*iconv_opt || (*iconv_opt == '.' && iconv_opt[1] == '\0')) + charset = defset; + else + charset = iconv_opt; + + if ((ic_send = iconv_open(UTF8_CHARSET, charset)) == (iconv_t)-1) { + rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n", + UTF8_CHARSET, charset); + exit_cleanup(RERR_UNSUPPORTED); + } + + if ((ic_recv = iconv_open(charset, UTF8_CHARSET)) == (iconv_t)-1) { + rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n", + charset, UTF8_CHARSET); + exit_cleanup(RERR_UNSUPPORTED); + } + + if (DEBUG_GTE(ICONV, 1)) { + rprintf(FINFO, "[%s] charset: %s\n", + who_am_i(), *charset ? charset : "[LOCALE]"); + } +# endif +} + +/* This function converts the chars in the "in" xbuf into characters in the + * "out" xbuf. The ".len" chars of the "in" xbuf is used starting from its + * ".pos". The ".size" of the "out" xbuf restricts how many characters can + * be stored, starting at its ".pos+.len" position. Note that the last byte + * of the "out" xbuf is not used, which reserves space for a trailing '\0' + * (though it is up to the caller to store a trailing '\0', as needed). + * + * We return a 0 on success or a -1 on error. An error also sets errno to + * E2BIG, EILSEQ, or EINVAL (see below); otherwise errno will be set to 0. + * The "in" xbuf is altered to update ".pos" and ".len". The "out" xbuf has + * data appended, and its ".len" incremented (see below for a ".size" note). + * + * If ICB_CIRCULAR_OUT is set in "flags", the chars going into the "out" xbuf + * can wrap around to the start, and the xbuf may have its ".size" reduced + * (presumably by 1 byte) if the iconv code doesn't have space to store a + * multi-byte character at the physical end of the ".buf" (though no reducing + * happens if ".pos" is <= 1, since there is no room to wrap around). + * + * If ICB_EXPAND_OUT is set in "flags", the "out" xbuf will be allocated if + * empty, and (as long as ICB_CIRCULAR_OUT is not set) expanded if too small. + * This prevents the return of E2BIG (except for a circular xbuf). + * + * If ICB_INCLUDE_BAD is set in "flags", any badly-encoded chars are included + * verbatim in the "out" xbuf, so EILSEQ will not be returned. + * + * If ICB_INCLUDE_INCOMPLETE is set in "flags", any incomplete multi-byte + * chars are included, which ensures that EINVAL is not returned. + * + * If ICB_INIT is set, the iconv() conversion state is initialized prior to + * processing the characters. */ +int iconvbufs(iconv_t ic, xbuf *in, xbuf *out, int flags) +{ + ICONV_CONST char *ibuf; + size_t icnt, ocnt, opos; + char *obuf; + + if (!out->size && flags & ICB_EXPAND_OUT) { + size_t siz = ROUND_UP_1024(in->len * 2); + alloc_xbuf(out, siz); + } else if (out->len+1 >= out->size) { + /* There is no room to even start storing data. */ + if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) { + errno = E2BIG; + return -1; + } + realloc_xbuf(out, out->size + ROUND_UP_1024(in->len * 2)); + } + + if (flags & ICB_INIT) + iconv(ic, NULL, 0, NULL, 0); + + ibuf = in->buf + in->pos; + icnt = in->len; + + opos = out->pos + out->len; + if (flags & ICB_CIRCULAR_OUT) { + if (opos >= out->size) { + opos -= out->size; + /* We know that out->pos is not 0 due to the "no room" check + * above, so this can't go "negative". */ + ocnt = out->pos - opos - 1; + } else { + /* Allow the use of all bytes to the physical end of the buffer + * unless pos is 0, in which case we reserve our trailing '\0'. */ + ocnt = out->size - opos - (out->pos ? 0 : 1); + } + } else + ocnt = out->size - opos - 1; + obuf = out->buf + opos; + + while (icnt) { + while (iconv(ic, &ibuf, &icnt, &obuf, &ocnt) == (size_t)-1) { + if (errno == EINTR) + continue; + if (errno == EINVAL) { + if (!(flags & ICB_INCLUDE_INCOMPLETE)) + goto finish; + if (!ocnt) + goto e2big; + } else if (errno == EILSEQ) { + if (!(flags & ICB_INCLUDE_BAD)) + goto finish; + if (!ocnt) + goto e2big; + } else if (errno == E2BIG) { + size_t siz; + e2big: + opos = obuf - out->buf; + if (flags & ICB_CIRCULAR_OUT && out->pos > 1 && opos > out->pos) { + /* We are in a divided circular buffer at the physical + * end with room to wrap to the start. If iconv() refused + * to use one or more trailing bytes in the buffer, we + * set the size to ignore the unused bytes. */ + if (opos < out->size) + reduce_iobuf_size(out, opos); + obuf = out->buf; + ocnt = out->pos - 1; + continue; + } + if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) { + errno = E2BIG; + goto finish; + } + siz = ROUND_UP_1024(in->len * 2); + realloc_xbuf(out, out->size + siz); + obuf = out->buf + opos; + ocnt += siz; + continue; + } else { + rsyserr(FERROR, errno, "unexpected error from iconv()"); + exit_cleanup(RERR_UNSUPPORTED); + } + *obuf++ = *ibuf++; + ocnt--, icnt--; + if (!icnt) + break; + } + } + + errno = 0; + + finish: + opos = obuf - out->buf; + if (flags & ICB_CIRCULAR_OUT && opos < out->pos) + opos += out->size; + out->len = opos - out->pos; + + in->len = icnt; + in->pos = ibuf - in->buf; + + return errno ? -1 : 0; +} +#endif + +void send_protected_args(int fd, char *args[]) +{ + int i; +#ifdef ICONV_OPTION + int convert = ic_send != (iconv_t)-1; + xbuf outbuf, inbuf; + + if (convert) + alloc_xbuf(&outbuf, 1024); +#endif + + for (i = 0; args[i]; i++) {} /* find first NULL */ + args[i] = "rsync"; /* set a new arg0 */ + if (DEBUG_GTE(CMD, 1)) + print_child_argv("protected args:", args + i + 1); + do { + if (!args[i][0]) + write_buf(fd, ".", 2); +#ifdef ICONV_OPTION + else if (convert) { + INIT_XBUF_STRLEN(inbuf, args[i]); + iconvbufs(ic_send, &inbuf, &outbuf, + ICB_EXPAND_OUT | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_INIT); + outbuf.buf[outbuf.len] = '\0'; + write_buf(fd, outbuf.buf, outbuf.len + 1); + outbuf.len = 0; + } +#endif + else + write_buf(fd, args[i], strlen(args[i]) + 1); + } while (args[++i]); + write_byte(fd, 0); + +#ifdef ICONV_OPTION + if (convert) + free(outbuf.buf); +#endif +} + +int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr, char *buf, int *len_ptr) +{ + int len, iflags = 0; + struct file_list *flist; + uchar fnamecmp_type = FNAMECMP_FNAME; + int ndx; + + read_loop: + while (1) { + ndx = read_ndx(f_in); + + if (ndx >= 0) + break; + if (ndx == NDX_DONE) + return ndx; + if (ndx == NDX_DEL_STATS) { + read_del_stats(f_in); + if (am_sender && am_server) + write_del_stats(f_out); + continue; + } + if (!inc_recurse || am_sender) { + int last; + if (first_flist) + last = first_flist->prev->ndx_start + first_flist->prev->used - 1; + else + last = -1; + rprintf(FERROR, + "Invalid file index: %d (%d - %d) [%s]\n", + ndx, NDX_DONE, last, who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } + if (ndx == NDX_FLIST_EOF) { + flist_eof = 1; + if (DEBUG_GTE(FLIST, 3)) + rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); + write_int(f_out, NDX_FLIST_EOF); + continue; + } + ndx = NDX_FLIST_OFFSET - ndx; + if (ndx < 0 || ndx >= dir_flist->used) { + ndx = NDX_FLIST_OFFSET - ndx; + rprintf(FERROR, + "Invalid dir index: %d (%d - %d) [%s]\n", + ndx, NDX_FLIST_OFFSET, + NDX_FLIST_OFFSET - dir_flist->used + 1, + who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } + + if (DEBUG_GTE(FLIST, 2)) { + rprintf(FINFO, "[%s] receiving flist for dir %d\n", + who_am_i(), ndx); + } + /* Send all the data we read for this flist to the generator. */ + start_flist_forward(ndx); + flist = recv_file_list(f_in, ndx); + flist->parent_ndx = ndx; + stop_flist_forward(); + } + + iflags = protocol_version >= 29 ? read_shortint(f_in) + : ITEM_TRANSFER | ITEM_MISSING_DATA; + + /* Support the protocol-29 keep-alive style. */ + if (protocol_version < 30 && ndx == cur_flist->used && iflags == ITEM_IS_NEW) { + if (am_sender) + maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH); + goto read_loop; + } + + flist = flist_for_ndx(ndx, "read_ndx_and_attrs"); + if (flist != cur_flist) { + cur_flist = flist; + if (am_sender) { + file_old_total = cur_flist->used; + for (flist = first_flist; flist != cur_flist; flist = flist->next) + file_old_total += flist->used; + } + } + + if (iflags & ITEM_BASIS_TYPE_FOLLOWS) + fnamecmp_type = read_byte(f_in); + *type_ptr = fnamecmp_type; + + if (iflags & ITEM_XNAME_FOLLOWS) { + if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0) + exit_cleanup(RERR_PROTOCOL); + + if (sanitize_paths) { + sanitize_path(buf, buf, "", 0, SP_DEFAULT); + len = strlen(buf); + } + } else { + *buf = '\0'; + len = -1; + } + *len_ptr = len; + + if (iflags & ITEM_TRANSFER) { + int i = ndx - cur_flist->ndx_start; + if (i < 0 || !S_ISREG(cur_flist->files[i]->mode)) { + rprintf(FERROR, + "received request to transfer non-regular file: %d [%s]\n", + ndx, who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } + } + + *iflag_ptr = iflags; + return ndx; +} + +/* + free a sums struct + */ +void free_sums(struct sum_struct *s) +{ + if (s->sums) free(s->sums); + free(s); +} + +/* This is only called when we aren't preserving permissions. Figure out what + * the permissions should be and return them merged back into the mode. */ +mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int dflt_perms, + int exists) +{ + int new_mode; + /* If the file already exists, we'll return the local permissions, + * possibly tweaked by the --executability option. */ + if (exists) { + new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS); + if (preserve_executability && S_ISREG(flist_mode)) { + /* If the source file is executable, grant execute + * rights to everyone who can read, but ONLY if the + * file isn't already executable. */ + if (!(flist_mode & 0111)) + new_mode &= ~0111; + else if (!(stat_mode & 0111)) + new_mode |= (new_mode & 0444) >> 2; + } + } else { + /* Apply destination default permissions and turn + * off special permissions. */ + new_mode = flist_mode & (~CHMOD_BITS | dflt_perms); + } + return new_mode; +} + +static int same_mtime(struct file_struct *file, STRUCT_STAT *st, int extra_accuracy) +{ +#ifdef ST_MTIME_NSEC + uint32 f1_nsec = F_MOD_NSEC_or_0(file); + uint32 f2_nsec = (uint32)st->ST_MTIME_NSEC; +#else + uint32 f1_nsec = 0, f2_nsec = 0; +#endif + + if (extra_accuracy) /* ignore modify_window when setting the time after a transfer or checksum check */ + return file->modtime == st->st_mtime && f1_nsec == f2_nsec; + + return same_time(file->modtime, f1_nsec, st->st_mtime , f2_nsec); +} + +int set_file_attrs(const char *fname, struct file_struct *file, stat_x *sxp, + const char *fnamecmp, int flags) +{ + int updated = 0; + stat_x sx2; + int change_uid, change_gid; + mode_t new_mode = file->mode; + int inherit; + + if (!sxp) { + if (dry_run) + return 1; + if (link_stat(fname, &sx2.st, 0) < 0) { + rsyserr(FERROR_XFER, errno, "stat %s failed", + full_fname(fname)); + return 0; + } + init_stat_x(&sx2); + sxp = &sx2; + inherit = !preserve_perms; + } else + inherit = !preserve_perms && file->flags & FLAG_DIR_CREATED; + + if (inherit && S_ISDIR(new_mode) && sxp->st.st_mode & S_ISGID) { + /* We just created this directory and its setgid + * bit is on, so make sure it stays on. */ + new_mode |= S_ISGID; + } + + if (daemon_chmod_modes && !S_ISLNK(new_mode)) + new_mode = tweak_mode(new_mode, daemon_chmod_modes); + +#ifdef SUPPORT_ACLS + if (preserve_acls && !S_ISLNK(file->mode) && !ACL_READY(*sxp)) + get_acl(fname, sxp); +#endif + + change_uid = am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file); + change_gid = gid_ndx && !(file->flags & FLAG_SKIP_GROUP) + && sxp->st.st_gid != (gid_t)F_GROUP(file); +#ifndef CAN_CHOWN_SYMLINK + if (S_ISLNK(sxp->st.st_mode)) { + ; + } else +#endif + if (change_uid || change_gid) { + if (DEBUG_GTE(OWN, 1)) { + if (change_uid) { + rprintf(FINFO, + "set uid of %s from %u to %u\n", + fname, (unsigned)sxp->st.st_uid, F_OWNER(file)); + } + if (change_gid) { + rprintf(FINFO, + "set gid of %s from %u to %u\n", + fname, (unsigned)sxp->st.st_gid, F_GROUP(file)); + } + } + if (am_root >= 0) { + uid_t uid = change_uid ? (uid_t)F_OWNER(file) : sxp->st.st_uid; + gid_t gid = change_gid ? (gid_t)F_GROUP(file) : sxp->st.st_gid; + if (do_lchown(fname, uid, gid) != 0) { + /* We shouldn't have attempted to change uid + * or gid unless have the privilege. */ + rsyserr(FERROR_XFER, errno, "%s %s failed", + change_uid ? "chown" : "chgrp", + full_fname(fname)); + goto cleanup; + } + if (uid == (uid_t)-1 && sxp->st.st_uid != (uid_t)-1) + rprintf(FERROR_XFER, "uid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname)); + if (gid == (gid_t)-1 && sxp->st.st_gid != (gid_t)-1) + rprintf(FERROR_XFER, "gid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname)); + /* A lchown had been done, so we need to re-stat if + * the destination had the setuid or setgid bits set + * (due to the side effect of the chown call). */ + if (sxp->st.st_mode & (S_ISUID | S_ISGID)) { + link_stat(fname, &sxp->st, + keep_dirlinks && S_ISDIR(sxp->st.st_mode)); + } + } + if (change_uid) + updated |= UPDATED_OWNER; + if (change_gid) + updated |= UPDATED_GROUP; + } + +#ifdef SUPPORT_XATTRS + if (am_root < 0) + set_stat_xattr(fname, file, new_mode); + if (preserve_xattrs && fnamecmp) + set_xattr(fname, file, fnamecmp, sxp); +#endif + + if ((omit_dir_times && S_ISDIR(sxp->st.st_mode)) + || (omit_link_times && S_ISLNK(sxp->st.st_mode))) + flags |= ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME | ATTRS_SKIP_CRTIME; + else { + if (!preserve_mtimes) + flags |= ATTRS_SKIP_MTIME; + if (!atimes_ndx || S_ISDIR(sxp->st.st_mode)) + flags |= ATTRS_SKIP_ATIME; + /* Don't set the creation date on the root folder of an HFS+ volume. */ + if (sxp->st.st_ino == 2 && S_ISDIR(sxp->st.st_mode)) + flags |= ATTRS_SKIP_CRTIME; + } + if (sxp != &sx2) + memcpy(&sx2.st, &sxp->st, sizeof sx2.st); + if (!(flags & ATTRS_SKIP_MTIME) && !same_mtime(file, &sxp->st, flags & ATTRS_ACCURATE_TIME)) { + sx2.st.st_mtime = file->modtime; +#ifdef ST_MTIME_NSEC + sx2.st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file); +#endif + updated |= UPDATED_MTIME; + } + if (!(flags & ATTRS_SKIP_ATIME)) { + time_t file_atime = F_ATIME(file); + if (flags & ATTRS_ACCURATE_TIME || !same_time(sxp->st.st_atime, 0, file_atime, 0)) { + sx2.st.st_atime = file_atime; +#ifdef ST_ATIME_NSEC + sx2.st.ST_ATIME_NSEC = 0; +#endif + updated |= UPDATED_ATIME; + } + } +#ifdef SUPPORT_CRTIMES + if (crtimes_ndx && !(flags & ATTRS_SKIP_CRTIME)) { + time_t file_crtime = F_CRTIME(file); + if (sxp->crtime == 0) + sxp->crtime = get_create_time(fname, &sxp->st); + if (!same_time(sxp->crtime, 0L, file_crtime, 0L)) { + if ( +#ifdef HAVE_GETATTRLIST + do_setattrlist_crtime(fname, file_crtime) == 0 +#elif defined __CYGWIN__ + do_SetFileTime(fname, file_crtime) == 0 +#else +#error Unknown crtimes implementation +#endif + ) + updated |= UPDATED_CRTIME; + } + } +#endif + if (updated & (UPDATED_MTIME|UPDATED_ATIME)) { + int ret = set_times(fname, &sx2.st); + if (ret < 0) { + rsyserr(FERROR_XFER, errno, "failed to set times on %s", full_fname(fname)); + goto cleanup; + } + if (ret > 0) { /* ret == 1 if symlink could not be set */ + updated &= ~(UPDATED_MTIME|UPDATED_ATIME); + file->flags |= FLAG_TIME_FAILED; + } + } + +#ifdef SUPPORT_ACLS + /* It's OK to call set_acl() now, even for a dir, as the generator + * will enable owner-writability using chmod, if necessary. + * + * If set_acl() changes permission bits in the process of setting + * an access ACL, it changes sxp->st.st_mode so we know whether we + * need to chmod(). */ + if (preserve_acls && !S_ISLNK(new_mode)) { + if (set_acl(fname, file, sxp, new_mode) > 0) + updated |= UPDATED_ACLS; + } +#endif + +#ifdef HAVE_CHMOD + if (!BITS_EQUAL(sxp->st.st_mode, new_mode, CHMOD_BITS)) { + int ret = am_root < 0 ? 0 : do_chmod(fname, new_mode); + if (ret < 0) { + rsyserr(FERROR_XFER, errno, + "failed to set permissions on %s", + full_fname(fname)); + goto cleanup; + } + if (ret == 0) /* ret == 1 if symlink could not be set */ + updated |= UPDATED_MODE; + } +#endif + + if (INFO_GTE(NAME, 2) && flags & ATTRS_REPORT) { + if (updated) + rprintf(FCLIENT, "%s\n", fname); + else + rprintf(FCLIENT, "%s is uptodate\n", fname); + } + cleanup: + if (sxp == &sx2) + free_stat_x(&sx2); + return updated; +} + +/* This is only called for SIGINT, SIGHUP, and SIGTERM. */ +void sig_int(int sig_num) +{ + called_from_signal_handler = 1; + + /* KLUGE: if the user hits Ctrl-C while ssh is prompting + * for a password, then our cleanup's sending of a SIGUSR1 + * signal to all our children may kill ssh before it has a + * chance to restore the tty settings (i.e. turn echo back + * on). By sleeping for a short time, ssh gets a bigger + * chance to do the right thing. If child processes are + * not ssh waiting for a password, then this tiny delay + * shouldn't hurt anything. */ + msleep(400); + + /* If we're an rsync daemon listener (not a daemon server), + * we'll exit with status 0 if we received SIGTERM. */ + if (am_daemon && !am_server && sig_num == SIGTERM) + exit_cleanup(0); + + /* If the signal arrived on the server side (or for the receiver + * process on the client), we want to try to do a controlled shutdown + * that lets the client side (generator process) know what happened. + * To do this, we set a flag and let the normal process handle the + * shutdown. We only attempt this if multiplexed IO is in effect and + * we didn't already set the flag. */ + if (!got_kill_signal && (am_server || am_receiver)) { + got_kill_signal = sig_num; + called_from_signal_handler = 0; + return; + } + + exit_cleanup(RERR_SIGNAL); +} + +/* Finish off a file transfer: renaming the file and setting the file's + * attributes (e.g. permissions, ownership, etc.). If the robust_rename() + * call is forced to copy the temp file and partialptr is both non-NULL and + * not an absolute path, we stage the file into the partial-dir and then + * rename it into place. This returns 1 on success or 0 on failure. */ +int finish_transfer(const char *fname, const char *fnametmp, + const char *fnamecmp, const char *partialptr, + struct file_struct *file, int ok_to_set_time, + int overwriting_basis) +{ + int ret; + const char *temp_copy_name = partialptr && *partialptr != '/' ? partialptr : NULL; + + if (inplace) { + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO, "finishing %s\n", fname); + fnametmp = fname; + goto do_set_file_attrs; + } + + if (make_backups > 0 && overwriting_basis) { + int ok = make_backup(fname, False); + if (!ok) + exit_cleanup(RERR_FILEIO); + if (ok == 1 && fnamecmp == fname) + fnamecmp = get_backup_name(fname); + } + + /* Change permissions before putting the file into place. */ + set_file_attrs(fnametmp, file, NULL, fnamecmp, + ok_to_set_time ? ATTRS_ACCURATE_TIME : ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME | ATTRS_SKIP_CRTIME); + + /* move tmp file over real file */ + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname); + ret = robust_rename(fnametmp, fname, temp_copy_name, file->mode); + if (ret < 0) { + rsyserr(FERROR_XFER, errno, "%s %s -> \"%s\"", + ret == -2 ? "copy" : "rename", + full_fname(fnametmp), fname); + if (!partialptr || (ret == -2 && temp_copy_name) + || robust_rename(fnametmp, partialptr, NULL, file->mode) < 0) + do_unlink(fnametmp); + return 0; + } + if (ret == 0) { + /* The file was moved into place (not copied), so it's done. */ + return 1; + } + /* The file was copied, so tweak the perms of the copied file. If it + * was copied to partialptr, move it into its final destination. */ + fnametmp = temp_copy_name ? temp_copy_name : fname; + + do_set_file_attrs: + set_file_attrs(fnametmp, file, NULL, fnamecmp, + ok_to_set_time ? ATTRS_ACCURATE_TIME : ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME | ATTRS_SKIP_CRTIME); + + if (temp_copy_name) { + if (do_rename(fnametmp, fname) < 0) { + rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\"", + full_fname(fnametmp), fname); + return 0; + } + handle_partial_dir(temp_copy_name, PDIR_DELETE); + } + return 1; +} + +struct file_list *flist_for_ndx(int ndx, const char *fatal_error_loc) +{ + struct file_list *flist = cur_flist; + + if (!flist && !(flist = first_flist)) + goto not_found; + + while (ndx < flist->ndx_start-1) { + if (flist == first_flist) + goto not_found; + flist = flist->prev; + } + while (ndx >= flist->ndx_start + flist->used) { + if (!(flist = flist->next)) + goto not_found; + } + return flist; + + not_found: + if (fatal_error_loc) { + int first, last; + if (first_flist) { + first = first_flist->ndx_start - 1; + last = first_flist->prev->ndx_start + first_flist->prev->used - 1; + } else { + first = 0; + last = -1; + } + rprintf(FERROR, + "File-list index %d not in %d - %d (%s) [%s]\n", + ndx, first, last, fatal_error_loc, who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } + return NULL; +} + +const char *who_am_i(void) +{ + if (am_starting_up) + return am_server ? "server" : "client"; + return am_sender ? "sender" + : am_generator ? "generator" + : am_receiver ? "receiver" + : "Receiver"; /* pre-forked receiver */ +} |