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Diffstat (limited to '')
| -rw-r--r-- | main.c | 1864 |
1 files changed, 1864 insertions, 0 deletions
@@ -0,0 +1,1864 @@ +/* + * The startup routines, including main(), for rsync. + * + * Copyright (C) 1996-2001 Andrew Tridgell <tridge@samba.org> + * Copyright (C) 1996 Paul Mackerras + * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> + * 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 "inums.h" +#include "ifuncs.h" +#include "io.h" +#if defined CONFIG_LOCALE && defined HAVE_LOCALE_H +#include <locale.h> +#endif +#include <popt.h> +#ifdef __TANDEM +#include <floss.h(floss_execlp)> +#endif + +extern int dry_run; +extern int list_only; +extern int io_timeout; +extern int am_root; +extern int am_server; +extern int am_sender; +extern int am_daemon; +extern int inc_recurse; +extern int blocking_io; +extern int always_checksum; +extern int remove_source_files; +extern int output_needs_newline; +extern int called_from_signal_handler; +extern int need_messages_from_generator; +extern int kluge_around_eof; +extern int got_xfer_error; +extern int old_style_args; +extern int msgs2stderr; +extern int module_id; +extern int read_only; +extern int copy_links; +extern int copy_dirlinks; +extern int copy_unsafe_links; +extern int keep_dirlinks; +extern int preserve_hard_links; +extern int protocol_version; +extern int mkpath_dest_arg; +extern int file_total; +extern int recurse; +extern int xfer_dirs; +extern int protect_args; +extern int relative_paths; +extern int sanitize_paths; +extern int curr_dir_depth; +extern int curr_dir_len; +extern int module_id; +extern int rsync_port; +extern int whole_file; +extern int read_batch; +extern int write_batch; +extern int batch_fd; +extern int sock_f_in; +extern int sock_f_out; +extern int filesfrom_fd; +extern int connect_timeout; +extern int send_msgs_to_gen; +extern dev_t filesystem_dev; +extern pid_t cleanup_child_pid; +extern size_t bwlimit_writemax; +extern unsigned int module_dirlen; +extern BOOL flist_receiving_enabled; +extern BOOL want_progress_now; +extern BOOL shutting_down; +extern int backup_dir_len; +extern int basis_dir_cnt; +extern int default_af_hint; +extern int stdout_format_has_i; +extern struct stats stats; +extern char *stdout_format; +extern char *logfile_format; +extern char *filesfrom_host; +extern char *partial_dir; +extern char *rsync_path; +extern char *shell_cmd; +extern char *password_file; +extern char *backup_dir; +extern char *copy_as; +extern char *tmpdir; +extern char curr_dir[MAXPATHLEN]; +extern char backup_dir_buf[MAXPATHLEN]; +extern char *basis_dir[MAX_BASIS_DIRS+1]; +extern struct file_list *first_flist; +extern filter_rule_list daemon_filter_list, implied_filter_list; + +uid_t our_uid; +gid_t our_gid; +int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */ +int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */ +int local_server = 0; +int daemon_connection = 0; /* 0 = no daemon, 1 = daemon via remote shell, -1 = daemon via socket */ +mode_t orig_umask = 0; +int batch_gen_fd = -1; +int sender_keeps_checksum = 0; +int raw_argc, cooked_argc; +char **raw_argv, **cooked_argv; + +/* There's probably never more than at most 2 outstanding child processes, + * but set it higher, just in case. */ +#define MAXCHILDPROCS 7 + +#ifdef HAVE_SIGACTION +# ifdef HAVE_SIGPROCMASK +# define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n)) +# else +# define SIGACTMASK(n,h) SIGACTION(n,h) +# endif +static struct sigaction sigact; +#endif + +struct pid_status { + pid_t pid; + int status; +} pid_stat_table[MAXCHILDPROCS]; + +static time_t starttime, endtime; +static int64 total_read, total_written; + +static void show_malloc_stats(void); + +/* Works like waitpid(), but if we already harvested the child pid in our + * remember_children(), we succeed instead of returning an error. */ +pid_t wait_process(pid_t pid, int *status_ptr, int flags) +{ + pid_t waited_pid; + + do { + waited_pid = waitpid(pid, status_ptr, flags); + } while (waited_pid == -1 && errno == EINTR); + + if (waited_pid == -1 && errno == ECHILD) { + /* Status of requested child no longer available: check to + * see if it was processed by remember_children(). */ + int cnt; + for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { + if (pid == pid_stat_table[cnt].pid) { + *status_ptr = pid_stat_table[cnt].status; + pid_stat_table[cnt].pid = 0; + return pid; + } + } + } + + return waited_pid; +} + +int shell_exec(const char *cmd) +{ + char *shell = getenv("RSYNC_SHELL"); + int status; + pid_t pid; + + if (!shell) + return system(cmd); + + if ((pid = fork()) < 0) + return -1; + + if (pid == 0) { + execlp(shell, shell, "-c", cmd, NULL); + _exit(1); + } + + int ret = wait_process(pid, &status, 0); + return ret < 0 ? -1 : status; +} + +/* Wait for a process to exit, calling io_flush while waiting. */ +static void wait_process_with_flush(pid_t pid, int *exit_code_ptr) +{ + pid_t waited_pid; + int status; + + while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) { + msleep(20); + io_flush(FULL_FLUSH); + } + + /* TODO: If the child exited on a signal, then log an + * appropriate error message. Perhaps we should also accept a + * message describing the purpose of the child. Also indicate + * this to the caller so that they know something went wrong. */ + if (waited_pid < 0) { + rsyserr(FERROR, errno, "waitpid"); + *exit_code_ptr = RERR_WAITCHILD; + } else if (!WIFEXITED(status)) { +#ifdef WCOREDUMP + if (WCOREDUMP(status)) + *exit_code_ptr = RERR_CRASHED; + else +#endif + if (WIFSIGNALED(status)) + *exit_code_ptr = RERR_TERMINATED; + else + *exit_code_ptr = RERR_WAITCHILD; + } else + *exit_code_ptr = WEXITSTATUS(status); +} + +void write_del_stats(int f) +{ + if (read_batch) + write_int(f, NDX_DEL_STATS); + else + write_ndx(f, NDX_DEL_STATS); + write_varint(f, stats.deleted_files - stats.deleted_dirs + - stats.deleted_symlinks - stats.deleted_devices + - stats.deleted_specials); + write_varint(f, stats.deleted_dirs); + write_varint(f, stats.deleted_symlinks); + write_varint(f, stats.deleted_devices); + write_varint(f, stats.deleted_specials); +} + +void read_del_stats(int f) +{ + stats.deleted_files = read_varint(f); + stats.deleted_files += stats.deleted_dirs = read_varint(f); + stats.deleted_files += stats.deleted_symlinks = read_varint(f); + stats.deleted_files += stats.deleted_devices = read_varint(f); + stats.deleted_files += stats.deleted_specials = read_varint(f); +} + +static void become_copy_as_user() +{ + char *gname; + uid_t uid; + gid_t gid; + + if (!copy_as) + return; + + if (DEBUG_GTE(CMD, 2)) + rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as); + + if ((gname = strchr(copy_as, ':')) != NULL) + *gname++ = '\0'; + + if (!user_to_uid(copy_as, &uid, True)) { + rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as); + exit_cleanup(RERR_SYNTAX); + } + + if (gname) { + if (!group_to_gid(gname, &gid, True)) { + rprintf(FERROR, "Invalid copy-as group: %s\n", gname); + exit_cleanup(RERR_SYNTAX); + } + } else { + struct passwd *pw; + if ((pw = getpwuid(uid)) == NULL) { + rsyserr(FERROR, errno, "getpwuid failed"); + exit_cleanup(RERR_SYNTAX); + } + gid = pw->pw_gid; + } + + if (setgid(gid) < 0) { + rsyserr(FERROR, errno, "setgid failed"); + exit_cleanup(RERR_SYNTAX); + } +#ifdef HAVE_SETGROUPS + if (setgroups(1, &gid)) { + rsyserr(FERROR, errno, "setgroups failed"); + exit_cleanup(RERR_SYNTAX); + } +#endif +#ifdef HAVE_INITGROUPS + if (!gname && initgroups(copy_as, gid) < 0) { + rsyserr(FERROR, errno, "initgroups failed"); + exit_cleanup(RERR_SYNTAX); + } +#endif + + if (setuid(uid) < 0 +#ifdef HAVE_SETEUID + || seteuid(uid) < 0 +#endif + ) { + rsyserr(FERROR, errno, "setuid failed"); + exit_cleanup(RERR_SYNTAX); + } + + our_uid = MY_UID(); + our_gid = MY_GID(); + am_root = (our_uid == ROOT_UID); + + if (gname) + gname[-1] = ':'; +} + +/* This function gets called from all 3 processes. We want the client side + * to actually output the text, but the sender is the only process that has + * all the stats we need. So, if we're a client sender, we do the report. + * If we're a server sender, we write the stats on the supplied fd. If + * we're the client receiver we read the stats from the supplied fd and do + * the report. All processes might also generate a set of debug stats, if + * the verbose level is high enough (this is the only thing that the + * generator process and the server receiver ever do here). */ +static void handle_stats(int f) +{ + endtime = time(NULL); + + /* Cache two stats because the read/write code can change it. */ + total_read = stats.total_read; + total_written = stats.total_written; + + if (INFO_GTE(STATS, 3)) { + /* These come out from every process */ + show_malloc_stats(); + show_flist_stats(); + } + + if (am_generator) + return; + + if (am_daemon) { + if (f == -1 || !am_sender) + return; + } + + if (am_server) { + if (am_sender) { + write_varlong30(f, total_read, 3); + write_varlong30(f, total_written, 3); + write_varlong30(f, stats.total_size, 3); + if (protocol_version >= 29) { + write_varlong30(f, stats.flist_buildtime, 3); + write_varlong30(f, stats.flist_xfertime, 3); + } + } + return; + } + + /* this is the client */ + + if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */ + ; + else if (!am_sender) { + /* Read the first two in opposite order because the meaning of + * read/write swaps when switching from sender to receiver. */ + total_written = read_varlong30(f, 3); + total_read = read_varlong30(f, 3); + stats.total_size = read_varlong30(f, 3); + if (protocol_version >= 29) { + stats.flist_buildtime = read_varlong30(f, 3); + stats.flist_xfertime = read_varlong30(f, 3); + } + } else if (write_batch) { + /* The --read-batch process is going to be a client + * receiver, so we need to give it the stats. */ + write_varlong30(batch_fd, total_read, 3); + write_varlong30(batch_fd, total_written, 3); + write_varlong30(batch_fd, stats.total_size, 3); + if (protocol_version >= 29) { + write_varlong30(batch_fd, stats.flist_buildtime, 3); + write_varlong30(batch_fd, stats.flist_xfertime, 3); + } + } +} + +static void output_itemized_counts(const char *prefix, int *counts) +{ + static char *labels[] = { "reg", "dir", "link", "dev", "special" }; + char buf[1024], *pre = " ("; + int j, len = 0; + int total = counts[0]; + if (total) { + counts[0] -= counts[1] + counts[2] + counts[3] + counts[4]; + for (j = 0; j < 5; j++) { + if (counts[j]) { + len += snprintf(buf+len, sizeof buf - len - 2, + "%s%s: %s", + pre, labels[j], comma_num(counts[j])); + pre = ", "; + } + } + buf[len++] = ')'; + } + buf[len] = '\0'; + rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf); +} + +static const char *bytes_per_sec_human_dnum(void) +{ + if (starttime == (time_t)-1 || endtime == (time_t)-1) + return "UNKNOWN"; + return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2); +} + +static void output_summary(void) +{ + if (INFO_GTE(STATS, 2)) { + rprintf(FCLIENT, "\n"); + output_itemized_counts("Number of files", &stats.num_files); + if (protocol_version >= 29) + output_itemized_counts("Number of created files", &stats.created_files); + if (protocol_version >= 31) + output_itemized_counts("Number of deleted files", &stats.deleted_files); + rprintf(FINFO,"Number of regular files transferred: %s\n", + comma_num(stats.xferred_files)); + rprintf(FINFO,"Total file size: %s bytes\n", + human_num(stats.total_size)); + rprintf(FINFO,"Total transferred file size: %s bytes\n", + human_num(stats.total_transferred_size)); + rprintf(FINFO,"Literal data: %s bytes\n", + human_num(stats.literal_data)); + rprintf(FINFO,"Matched data: %s bytes\n", + human_num(stats.matched_data)); + rprintf(FINFO,"File list size: %s\n", + human_num(stats.flist_size)); + if (stats.flist_buildtime) { + rprintf(FINFO, + "File list generation time: %s seconds\n", + comma_dnum((double)stats.flist_buildtime / 1000, 3)); + rprintf(FINFO, + "File list transfer time: %s seconds\n", + comma_dnum((double)stats.flist_xfertime / 1000, 3)); + } + rprintf(FINFO,"Total bytes sent: %s\n", + human_num(total_written)); + rprintf(FINFO,"Total bytes received: %s\n", + human_num(total_read)); + } + + if (INFO_GTE(STATS, 1)) { + rprintf(FCLIENT, "\n"); + rprintf(FINFO, + "sent %s bytes received %s bytes %s bytes/sec\n", + human_num(total_written), human_num(total_read), + bytes_per_sec_human_dnum()); + rprintf(FINFO, "total size is %s speedup is %s%s\n", + human_num(stats.total_size), + comma_dnum((double)stats.total_size / (total_written+total_read), 2), + write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : ""); + } + + fflush(stdout); + fflush(stderr); +} + + +/** + * If our C library can get malloc statistics, then show them to FINFO + **/ +static void show_malloc_stats(void) +{ +#ifdef MEM_ALLOC_INFO + struct MEM_ALLOC_INFO mi = MEM_ALLOC_INFO(); /* mallinfo or mallinfo2 */ + + rprintf(FCLIENT, "\n"); + rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n", + (int)getpid(), am_server ? "server " : "", + am_daemon ? "daemon " : "", who_am_i()); + +#define PRINT_ALLOC_NUM(title, descr, num) \ + rprintf(FINFO, " %-11s%10" SIZE_T_FMT_MOD "d (" descr ")\n", \ + title ":", (SIZE_T_FMT_CAST)(num)); + + PRINT_ALLOC_NUM("arena", "bytes from sbrk", mi.arena); + PRINT_ALLOC_NUM("ordblks", "chunks not in use", mi.ordblks); + PRINT_ALLOC_NUM("smblks", "free fastbin blocks", mi.smblks); + PRINT_ALLOC_NUM("hblks", "chunks from mmap", mi.hblks); + PRINT_ALLOC_NUM("hblkhd", "bytes from mmap", mi.hblkhd); + PRINT_ALLOC_NUM("allmem", "bytes from sbrk + mmap", mi.arena + mi.hblkhd); + PRINT_ALLOC_NUM("usmblks", "always 0", mi.usmblks); + PRINT_ALLOC_NUM("fsmblks", "bytes in freed fastbin blocks", mi.fsmblks); + PRINT_ALLOC_NUM("uordblks", "bytes used", mi.uordblks); + PRINT_ALLOC_NUM("fordblks", "bytes free", mi.fordblks); + PRINT_ALLOC_NUM("keepcost", "bytes in releasable chunk", mi.keepcost); + +#undef PRINT_ALLOC_NUM + +#endif /* MEM_ALLOC_INFO */ +} + + +/* Start the remote shell. cmd may be NULL to use the default. */ +static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc, + int *f_in_p, int *f_out_p) +{ + int i, argc = 0; + char *args[MAX_ARGS], *need_to_free = NULL; + pid_t pid; + int dash_l_set = 0; + + if (!read_batch && !local_server) { + char *t, *f, in_quote = '\0'; + char *rsh_env = getenv(RSYNC_RSH_ENV); + if (!cmd) + cmd = rsh_env; + if (!cmd) + cmd = RSYNC_RSH; + cmd = need_to_free = strdup(cmd); + + for (t = f = cmd; *f; f++) { + if (*f == ' ') + continue; + /* Comparison leaves rooms for server_options(). */ + if (argc >= MAX_ARGS - MAX_SERVER_ARGS) + goto arg_overflow; + args[argc++] = t; + while (*f != ' ' || in_quote) { + if (!*f) { + if (in_quote) { + rprintf(FERROR, + "Missing trailing-%c in remote-shell command.\n", + in_quote); + exit_cleanup(RERR_SYNTAX); + } + f--; + break; + } + if (*f == '\'' || *f == '"') { + if (!in_quote) { + in_quote = *f++; + continue; + } + if (*f == in_quote && *++f != in_quote) { + in_quote = '\0'; + continue; + } + } + *t++ = *f++; + } + *t++ = '\0'; + } + + /* NOTE: must preserve t == start of command name until the end of the args handling! */ + if ((t = strrchr(cmd, '/')) != NULL) + t++; + else + t = cmd; + + /* Check to see if we've already been given '-l user' in the remote-shell command. */ + for (i = 0; i < argc-1; i++) { + if (!strcmp(args[i], "-l") && args[i+1][0] != '-') + dash_l_set = 1; + } + +#ifdef HAVE_REMSH + /* remsh (on HPUX) takes the arguments the other way around */ + args[argc++] = machine; + if (user && !(daemon_connection && dash_l_set)) { + args[argc++] = "-l"; + args[argc++] = user; + } +#else + if (user && !(daemon_connection && dash_l_set)) { + args[argc++] = "-l"; + args[argc++] = user; + } +#ifdef AF_INET + if (default_af_hint == AF_INET && strcmp(t, "ssh") == 0) + args[argc++] = "-4"; /* we're using ssh so we can add a -4 option */ +#endif +#ifdef AF_INET6 + if (default_af_hint == AF_INET6 && strcmp(t, "ssh") == 0) + args[argc++] = "-6"; /* we're using ssh so we can add a -6 option */ +#endif + args[argc++] = machine; +#endif + + args[argc++] = rsync_path; + + if (blocking_io < 0 && (strcmp(t, "rsh") == 0 || strcmp(t, "remsh") == 0)) + blocking_io = 1; + + if (daemon_connection > 0) { + args[argc++] = "--server"; + args[argc++] = "--daemon"; + } else + server_options(args, &argc); + + if (argc >= MAX_ARGS - 2) + goto arg_overflow; + } + + args[argc++] = "."; + + if (!daemon_connection) { + while (remote_argc > 0) { + if (argc >= MAX_ARGS - 1) { + arg_overflow: + rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); + exit_cleanup(RERR_SYNTAX); + } + args[argc++] = safe_arg(NULL, *remote_argv++); + remote_argc--; + } + } + + args[argc] = NULL; + + if (DEBUG_GTE(CMD, 2)) { + for (i = 0; i < argc; i++) + rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]); + rprintf(FCLIENT, "\n"); + } + + if (read_batch) { + int from_gen_pipe[2]; + set_allow_inc_recurse(); + if (fd_pair(from_gen_pipe) < 0) { + rsyserr(FERROR, errno, "pipe"); + exit_cleanup(RERR_IPC); + } + batch_gen_fd = from_gen_pipe[0]; + *f_out_p = from_gen_pipe[1]; + *f_in_p = batch_fd; + pid = (pid_t)-1; /* no child pid */ +#ifdef ICONV_CONST + setup_iconv(); +#endif + } else if (local_server) { + /* If the user didn't request --[no-]whole-file, force + * it on, but only if we're not batch processing. */ + if (whole_file < 0 && !write_batch) + whole_file = 1; + set_allow_inc_recurse(); + pid = local_child(argc, args, f_in_p, f_out_p, child_main); +#ifdef ICONV_CONST + setup_iconv(); +#endif + } else { + pid = piped_child(args, f_in_p, f_out_p); +#ifdef ICONV_CONST + setup_iconv(); +#endif + if (protect_args && !daemon_connection) + send_protected_args(*f_out_p, args); + } + + if (need_to_free) + free(need_to_free); + + return pid; +} + +/* Older versions turn an empty string as a reference to the current directory. + * We now treat this as an error unless --old-args was used. */ +static char *dot_dir_or_error() +{ + if (old_style_args || am_server) + return "."; + rprintf(FERROR, "Empty destination arg specified (use \".\" or see --old-args).\n"); + exit_cleanup(RERR_SYNTAX); +} + +/* The receiving side operates in one of two modes: + * + * 1. it receives any number of files into a destination directory, + * placing them according to their names in the file-list. + * + * 2. it receives a single file and saves it using the name in the + * destination path instead of its file-list name. This requires a + * "local name" for writing out the destination file. + * + * So, our task is to figure out what mode/local-name we need. + * For mode 1, we change into the destination directory and return NULL. + * For mode 2, we change into the directory containing the destination + * file (if we aren't already there) and return the local-name. */ +static char *get_local_name(struct file_list *flist, char *dest_path) +{ + STRUCT_STAT st; + int statret, trailing_slash; + char *cp; + + if (DEBUG_GTE(RECV, 1)) { + rprintf(FINFO, "get_local_name count=%d %s\n", + file_total, NS(dest_path)); + } + + if (!dest_path || list_only) + return NULL; + + if (!*dest_path) + dest_path = dot_dir_or_error(); + + if (daemon_filter_list.head) { + char *slash = strrchr(dest_path, '/'); + if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0'))) + *slash = '\0'; + else + slash = NULL; + if ((*dest_path != '.' || dest_path[1] != '\0') + && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0 + || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) { + rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n", + dest_path); + exit_cleanup(RERR_FILESELECT); + } + if (slash) + *slash = '/'; + } + + /* See what currently exists at the destination. */ + statret = do_stat(dest_path, &st); + cp = strrchr(dest_path, '/'); + trailing_slash = cp && !cp[1]; + + if (mkpath_dest_arg && statret < 0 && (cp || file_total > 1)) { + int save_errno = errno; + int ret = make_path(dest_path, file_total > 1 && !trailing_slash ? 0 : MKP_DROP_NAME); + if (ret < 0) + goto mkdir_error; + if (ret && (INFO_GTE(NAME, 1) || stdout_format_has_i)) { + if (file_total == 1 || trailing_slash) + *cp = '\0'; + rprintf(FINFO, "created %d director%s for %s\n", ret, ret == 1 ? "y" : "ies", dest_path); + if (file_total == 1 || trailing_slash) + *cp = '/'; + } + if (ret) + statret = do_stat(dest_path, &st); + else + errno = save_errno; + } + + if (statret == 0) { + /* If the destination is a dir, enter it and use mode 1. */ + if (S_ISDIR(st.st_mode)) { + if (!change_dir(dest_path, CD_NORMAL)) { + rsyserr(FERROR, errno, "change_dir#1 %s failed", + full_fname(dest_path)); + exit_cleanup(RERR_FILESELECT); + } + filesystem_dev = st.st_dev; /* ensures --force works right w/-x */ + return NULL; + } + if (file_total > 1) { + rprintf(FERROR, + "ERROR: destination must be a directory when" + " copying more than 1 file\n"); + exit_cleanup(RERR_FILESELECT); + } + if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) { + rprintf(FERROR, + "ERROR: cannot overwrite non-directory" + " with a directory\n"); + exit_cleanup(RERR_FILESELECT); + } + } else if (errno != ENOENT) { + /* If we don't know what's at the destination, fail. */ + rsyserr(FERROR, errno, "ERROR: cannot stat destination %s", + full_fname(dest_path)); + exit_cleanup(RERR_FILESELECT); + } + + /* If we need a destination directory because the transfer is not + * of a single non-directory or the user has requested one via a + * destination path ending in a slash, create one and use mode 1. */ + if (file_total > 1 || trailing_slash) { + if (trailing_slash) + *cp = '\0'; /* Lop off the final slash (if any). */ + + if (statret == 0) { + rprintf(FERROR, "ERROR: destination path is not a directory\n"); + exit_cleanup(RERR_SYNTAX); + } + + if (do_mkdir(dest_path, ACCESSPERMS) != 0) { + mkdir_error: + rsyserr(FERROR, errno, "mkdir %s failed", + full_fname(dest_path)); + exit_cleanup(RERR_FILEIO); + } + + if (flist->high >= flist->low + && strcmp(flist->files[flist->low]->basename, ".") == 0) + flist->files[0]->flags |= FLAG_DIR_CREATED; + + if (INFO_GTE(NAME, 1) || stdout_format_has_i) + rprintf(FINFO, "created directory %s\n", dest_path); + + if (dry_run) { + /* Indicate that dest dir doesn't really exist. */ + dry_run++; + } + + if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) { + rsyserr(FERROR, errno, "change_dir#2 %s failed", + full_fname(dest_path)); + exit_cleanup(RERR_FILESELECT); + } + + return NULL; + } + + /* Otherwise, we are writing a single file, possibly on top of an + * existing non-directory. Change to the item's parent directory + * (if it has a path component), return the basename of the + * destination file as the local name, and use mode 2. */ + if (!cp) + return dest_path; + + if (cp == dest_path) + dest_path = "/"; + + *cp = '\0'; + if (!change_dir(dest_path, CD_NORMAL)) { + rsyserr(FERROR, errno, "change_dir#3 %s failed", + full_fname(dest_path)); + exit_cleanup(RERR_FILESELECT); + } + *cp = '/'; + + return cp + 1; +} + +/* This function checks on our alternate-basis directories. If we're in + * dry-run mode and the destination dir does not yet exist, we'll try to + * tweak any dest-relative paths to make them work for a dry-run (the + * destination dir must be in curr_dir[] when this function is called). + * We also warn about any arg that is non-existent or not a directory. */ +static void check_alt_basis_dirs(void) +{ + STRUCT_STAT st; + char *slash = strrchr(curr_dir, '/'); + int j; + + for (j = 0; j < basis_dir_cnt; j++) { + char *bdir = basis_dir[j]; + int bd_len = strlen(bdir); + if (bd_len > 1 && bdir[bd_len-1] == '/') + bdir[--bd_len] = '\0'; + if (dry_run > 1 && *bdir != '/') { + int len = curr_dir_len + 1 + bd_len + 1; + char *new = new_array(char, len); + if (slash && strncmp(bdir, "../", 3) == 0) { + /* We want to remove only one leading "../" prefix for + * the directory we couldn't create in dry-run mode: + * this ensures that any other ".." references get + * evaluated the same as they would for a live copy. */ + *slash = '\0'; + pathjoin(new, len, curr_dir, bdir + 3); + *slash = '/'; + } else + pathjoin(new, len, curr_dir, bdir); + basis_dir[j] = bdir = new; + } + if (do_stat(bdir, &st) < 0) + rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir); + else if (!S_ISDIR(st.st_mode)) + rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir); + } +} + +/* This is only called by the sender. */ +static void read_final_goodbye(int f_in, int f_out) +{ + int i, iflags, xlen; + uchar fnamecmp_type; + char xname[MAXPATHLEN]; + + shutting_down = True; + + if (protocol_version < 29) + i = read_int(f_in); + else { + i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen); + if (protocol_version >= 31 && i == NDX_DONE) { + if (am_sender) + write_ndx(f_out, NDX_DONE); + else { + if (batch_gen_fd >= 0) { + while (read_int(batch_gen_fd) != NDX_DEL_STATS) {} + read_del_stats(batch_gen_fd); + } + write_int(f_out, NDX_DONE); + } + i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen); + } + } + + if (i != NDX_DONE) { + rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n", + i, who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } +} + +static void do_server_sender(int f_in, int f_out, int argc, char *argv[]) +{ + struct file_list *flist; + char *dir; + + if (DEBUG_GTE(SEND, 1)) + rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid()); + + if (am_daemon && lp_write_only(module_id)) { + rprintf(FERROR, "ERROR: module is write only\n"); + exit_cleanup(RERR_SYNTAX); + } + if (am_daemon && read_only && remove_source_files) { + rprintf(FERROR, + "ERROR: --remove-%s-files cannot be used with a read-only module\n", + remove_source_files == 1 ? "source" : "sent"); + exit_cleanup(RERR_SYNTAX); + } + if (argc < 1) { + rprintf(FERROR, "ERROR: do_server_sender called without args\n"); + exit_cleanup(RERR_SYNTAX); + } + + become_copy_as_user(); + + dir = argv[0]; + if (!relative_paths) { + if (!change_dir(dir, CD_NORMAL)) { + rsyserr(FERROR, errno, "change_dir#3 %s failed", + full_fname(dir)); + exit_cleanup(RERR_FILESELECT); + } + } + argc--; + argv++; + + if (argc == 0 && (recurse || xfer_dirs || list_only)) { + argc = 1; + argv--; + argv[0] = "."; + } + + flist = send_file_list(f_out,argc,argv); + if (!flist || flist->used == 0) { + /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */ + io_end_buffering_in(0); + /* TODO: we should really exit in a more controlled manner. */ + exit_cleanup(0); + } + + io_start_buffering_in(f_in); + + send_files(f_in, f_out); + io_flush(FULL_FLUSH); + handle_stats(f_out); + if (protocol_version >= 24) + read_final_goodbye(f_in, f_out); + io_flush(FULL_FLUSH); + exit_cleanup(0); +} + + +static int do_recv(int f_in, int f_out, char *local_name) +{ + int pid; + int exit_code = 0; + int error_pipe[2]; + + /* The receiving side mustn't obey this, or an existing symlink that + * points to an identical file won't be replaced by the referent. */ + copy_links = copy_dirlinks = copy_unsafe_links = 0; + +#ifdef SUPPORT_HARD_LINKS + if (preserve_hard_links && !inc_recurse) + match_hard_links(first_flist); +#endif + + if (fd_pair(error_pipe) < 0) { + rsyserr(FERROR, errno, "pipe failed in do_recv"); + exit_cleanup(RERR_IPC); + } + + if (backup_dir) { + STRUCT_STAT st; + int ret; + if (backup_dir_len > 1) + backup_dir_buf[backup_dir_len-1] = '\0'; + ret = do_stat(backup_dir_buf, &st); + if (ret != 0 || !S_ISDIR(st.st_mode)) { + if (ret == 0) { + rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf); + exit_cleanup(RERR_SYNTAX); + } + if (errno != ENOENT) { + rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno)); + exit_cleanup(RERR_FILEIO); + } + if (INFO_GTE(BACKUP, 1)) + rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf); + } else if (INFO_GTE(BACKUP, 1)) + rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf); + if (backup_dir_len > 1) + backup_dir_buf[backup_dir_len-1] = '/'; + } + + if (tmpdir) { + STRUCT_STAT st; + int ret = do_stat(tmpdir, &st); + if (ret < 0 || !S_ISDIR(st.st_mode)) { + if (ret == 0) { + rprintf(FERROR, "The temp-dir is not a directory: %s\n", tmpdir); + exit_cleanup(RERR_SYNTAX); + } + if (errno == ENOENT) { + rprintf(FERROR, "The temp-dir does not exist: %s\n", tmpdir); + exit_cleanup(RERR_SYNTAX); + } + rprintf(FERROR, "Failed to stat temp-dir %s: %s\n", tmpdir, strerror(errno)); + exit_cleanup(RERR_FILEIO); + } + } + + io_flush(FULL_FLUSH); + + if ((pid = do_fork()) == -1) { + rsyserr(FERROR, errno, "fork failed in do_recv"); + exit_cleanup(RERR_IPC); + } + + if (pid == 0) { + am_receiver = 1; + send_msgs_to_gen = am_server; + + close(error_pipe[0]); + + /* We can't let two processes write to the socket at one time. */ + io_end_multiplex_out(MPLX_SWITCHING); + if (f_in != f_out) + close(f_out); + sock_f_out = -1; + f_out = error_pipe[1]; + + bwlimit_writemax = 0; /* receiver doesn't need to do this */ + + if (read_batch) + io_start_buffering_in(f_in); + io_start_multiplex_out(f_out); + + recv_files(f_in, f_out, local_name); + io_flush(FULL_FLUSH); + handle_stats(f_in); + + if (output_needs_newline) { + fputc('\n', stdout); + output_needs_newline = 0; + } + + write_int(f_out, NDX_DONE); + send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0); + io_flush(FULL_FLUSH); + + /* Handle any keep-alive packets from the post-processing work + * that the generator does. */ + if (protocol_version >= 29) { + kluge_around_eof = -1; + + /* This should only get stopped via a USR2 signal. */ + read_final_goodbye(f_in, f_out); + + rprintf(FERROR, "Invalid packet at end of run [%s]\n", + who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } + + /* Finally, we go to sleep until our parent kills us with a + * USR2 signal. We sleep for a short time, as on some OSes + * a signal won't interrupt a sleep! */ + while (1) + msleep(20); + } + + am_generator = 1; + implied_filter_list.head = implied_filter_list.tail = NULL; + flist_receiving_enabled = True; + + io_end_multiplex_in(MPLX_SWITCHING); + if (write_batch && !am_server) + stop_write_batch(); + + close(error_pipe[1]); + if (f_in != f_out) + close(f_in); + sock_f_in = -1; + f_in = error_pipe[0]; + + io_start_buffering_out(f_out); + io_start_multiplex_in(f_in); + +#ifdef SUPPORT_HARD_LINKS + if (preserve_hard_links && inc_recurse) { + struct file_list *flist; + for (flist = first_flist; flist; flist = flist->next) + match_hard_links(flist); + } +#endif + + generate_files(f_out, local_name); + + handle_stats(-1); + io_flush(FULL_FLUSH); + shutting_down = True; + if (protocol_version >= 24) { + /* send a final goodbye message */ + write_ndx(f_out, NDX_DONE); + } + io_flush(FULL_FLUSH); + + kill(pid, SIGUSR2); + wait_process_with_flush(pid, &exit_code); + return exit_code; +} + +static void do_server_recv(int f_in, int f_out, int argc, char *argv[]) +{ + int exit_code; + struct file_list *flist; + char *local_name = NULL; + int negated_levels; + + if (filesfrom_fd >= 0 && msgs2stderr != 1 && protocol_version < 31) { + /* We can't mix messages with files-from data on the socket, + * so temporarily turn off info/debug messages. */ + negate_output_levels(); + negated_levels = 1; + } else + negated_levels = 0; + + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid()); + + if (am_daemon && read_only) { + rprintf(FERROR,"ERROR: module is read only\n"); + exit_cleanup(RERR_SYNTAX); + return; + } + + become_copy_as_user(); + + if (argc > 0) { + char *dir = argv[0]; + argc--; + argv++; + if (!am_daemon && !change_dir(dir, CD_NORMAL)) { + rsyserr(FERROR, errno, "change_dir#4 %s failed", + full_fname(dir)); + exit_cleanup(RERR_FILESELECT); + } + } + + if (protocol_version >= 30) + io_start_multiplex_in(f_in); + else + io_start_buffering_in(f_in); + recv_filter_list(f_in); + + if (filesfrom_fd >= 0) { + /* We need to send the files-from names to the sender at the + * same time that we receive the file-list from them, so we + * need the IO routines to automatically write out the names + * onto our f_out socket as we read the file-list. This + * avoids both deadlock and extra delays/buffers. */ + start_filesfrom_forwarding(filesfrom_fd); + filesfrom_fd = -1; + } + + flist = recv_file_list(f_in, -1); + if (!flist) { + rprintf(FERROR,"server_recv: recv_file_list error\n"); + exit_cleanup(RERR_FILESELECT); + } + if (inc_recurse && file_total == 1) + recv_additional_file_list(f_in); + + if (negated_levels) + negate_output_levels(); + + if (argc > 0) + local_name = get_local_name(flist,argv[0]); + + /* Now that we know what our destination directory turned out to be, + * we can sanitize the --link-/copy-/compare-dest args correctly. */ + if (sanitize_paths) { + char **dir_p; + for (dir_p = basis_dir; *dir_p; dir_p++) + *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT); + if (partial_dir) + partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT); + } + check_alt_basis_dirs(); + + if (daemon_filter_list.head) { + char **dir_p; + filter_rule_list *elp = &daemon_filter_list; + + for (dir_p = basis_dir; *dir_p; dir_p++) { + char *dir = *dir_p; + if (*dir == '/') + dir += module_dirlen; + if (check_filter(elp, FLOG, dir, 1) < 0) + goto options_rejected; + } + if (partial_dir && *partial_dir == '/' + && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) { + options_rejected: + rprintf(FERROR, "Your options have been rejected by the server.\n"); + exit_cleanup(RERR_SYNTAX); + } + } + + exit_code = do_recv(f_in, f_out, local_name); + exit_cleanup(exit_code); +} + + +int child_main(int argc, char *argv[]) +{ + start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); + return 0; +} + + +void start_server(int f_in, int f_out, int argc, char *argv[]) +{ + set_nonblocking(f_in); + set_nonblocking(f_out); + + io_set_sock_fds(f_in, f_out); + setup_protocol(f_out, f_in); + + if (protocol_version >= 23) + io_start_multiplex_out(f_out); + if (am_daemon && io_timeout && protocol_version >= 31) + send_msg_int(MSG_IO_TIMEOUT, io_timeout); + + if (am_sender) { + keep_dirlinks = 0; /* Must be disabled on the sender. */ + if (need_messages_from_generator) + io_start_multiplex_in(f_in); + else + io_start_buffering_in(f_in); + recv_filter_list(f_in); + do_server_sender(f_in, f_out, argc, argv); + } else + do_server_recv(f_in, f_out, argc, argv); + exit_cleanup(0); +} + +/* This is called once the connection has been negotiated. It is used + * for rsyncd, remote-shell, and local connections. */ +int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[]) +{ + struct file_list *flist = NULL; + int exit_code = 0, exit_code2 = 0; + char *local_name = NULL; + + cleanup_child_pid = pid; + if (!read_batch) { + set_nonblocking(f_in); + set_nonblocking(f_out); + } + + io_set_sock_fds(f_in, f_out); + setup_protocol(f_out,f_in); + + /* We set our stderr file handle to blocking because ssh might have + * set it to non-blocking. This can be particularly troublesome if + * stderr is a clone of stdout, because ssh would have set our stdout + * to non-blocking at the same time (which can easily cause us to lose + * output from our print statements). This kluge shouldn't cause ssh + * any problems for how we use it. Note also that we delayed setting + * this until after the above protocol setup so that we know for sure + * that ssh is done twiddling its file descriptors. */ + set_blocking(STDERR_FILENO); + + if (am_sender) { + keep_dirlinks = 0; /* Must be disabled on the sender. */ + + if (always_checksum + && (log_format_has(stdout_format, 'C') + || log_format_has(logfile_format, 'C'))) + sender_keeps_checksum = 1; + + if (protocol_version >= 30) + io_start_multiplex_out(f_out); + else + io_start_buffering_out(f_out); + if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23)) + io_start_multiplex_in(f_in); + else + io_start_buffering_in(f_in); + send_filter_list(f_out); + if (filesfrom_host) + filesfrom_fd = f_in; + + if (write_batch && !am_server) + start_write_batch(f_out); + + become_copy_as_user(); + + flist = send_file_list(f_out, argc, argv); + if (DEBUG_GTE(FLIST, 3)) + rprintf(FINFO,"file list sent\n"); + + if (protocol_version < 31 && filesfrom_host && protocol_version >= 23) + io_start_multiplex_in(f_in); + + io_flush(NORMAL_FLUSH); + send_files(f_in, f_out); + io_flush(FULL_FLUSH); + handle_stats(-1); + if (protocol_version >= 24) + read_final_goodbye(f_in, f_out); + if (pid != -1) { + if (DEBUG_GTE(EXIT, 2)) + rprintf(FINFO,"client_run waiting on %d\n", (int) pid); + io_flush(FULL_FLUSH); + wait_process_with_flush(pid, &exit_code); + } + output_summary(); + io_flush(FULL_FLUSH); + exit_cleanup(exit_code); + } + + if (!read_batch) { + if (protocol_version >= 23) + io_start_multiplex_in(f_in); + if (need_messages_from_generator) + io_start_multiplex_out(f_out); + else + io_start_buffering_out(f_out); + } + + become_copy_as_user(); + + send_filter_list(read_batch ? -1 : f_out); + + if (filesfrom_fd >= 0) { + start_filesfrom_forwarding(filesfrom_fd); + filesfrom_fd = -1; + } + + if (write_batch && !am_server) + start_write_batch(f_in); + flist = recv_file_list(f_in, -1); + if (inc_recurse && file_total == 1) + recv_additional_file_list(f_in); + + if (flist && flist->used > 0) { + local_name = get_local_name(flist, argv[0]); + + check_alt_basis_dirs(); + + exit_code2 = do_recv(f_in, f_out, local_name); + } else { + handle_stats(-1); + output_summary(); + } + + if (pid != -1) { + if (DEBUG_GTE(RECV, 1)) + rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid); + io_flush(FULL_FLUSH); + wait_process_with_flush(pid, &exit_code); + } + + return MAX(exit_code, exit_code2); +} + +static void dup_argv(char *argv[]) +{ + int i; + + for (i = 0; argv[i]; i++) + argv[i] = strdup(argv[i]); +} + + +/* Start a client for either type of remote connection. Work out + * whether the arguments request a remote shell or rsyncd connection, + * and call the appropriate connection function, then run_client. + * + * Calls either start_socket_client (for sockets) or do_cmd and + * client_run (for ssh). */ +static int start_client(int argc, char *argv[]) +{ + char *p, *shell_machine = NULL, *shell_user = NULL; + char **remote_argv; + int remote_argc, env_port = rsync_port; + int f_in, f_out; + int ret; + pid_t pid; + + /* Don't clobber argv[] so that ps(1) can still show the right + * command line. */ + dup_argv(argv); + + if (!read_batch) { /* for read_batch, NO source is specified */ + char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port); + if (path) { /* source is remote */ + char *dummy_host; + int dummy_port = 0; + *argv = path; + remote_argv = argv; + remote_argc = argc; + argv += argc - 1; + if (argc == 1 || **argv == ':') + argc = 0; /* no dest arg */ + else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) { + rprintf(FERROR, + "The source and destination cannot both be remote.\n"); + exit_cleanup(RERR_SYNTAX); + } else { + remote_argc--; /* don't count dest */ + argc = 1; + } + if (filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) { + rprintf(FERROR, + "--files-from hostname is not the same as the transfer hostname\n"); + exit_cleanup(RERR_SYNTAX); + } + am_sender = 0; + if (rsync_port) + daemon_connection = shell_cmd ? 1 : -1; + } else { /* source is local, check dest arg */ + am_sender = 1; + + if (argc > 1) { + p = argv[--argc]; + if (!*p) + p = dot_dir_or_error(); + remote_argv = argv + argc; + } else { + static char *dotarg[1] = { "." }; + p = dotarg[0]; + remote_argv = dotarg; + } + remote_argc = 1; + + path = check_for_hostspec(p, &shell_machine, &rsync_port); + if (path && filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) { + rprintf(FERROR, + "--files-from hostname is not the same as the transfer hostname\n"); + exit_cleanup(RERR_SYNTAX); + } + if (!path) { /* no hostspec found, so src & dest are local */ + local_server = 1; + if (filesfrom_host) { + rprintf(FERROR, + "--files-from cannot be remote when the transfer is local\n"); + exit_cleanup(RERR_SYNTAX); + } + shell_machine = NULL; + rsync_port = 0; + } else { /* hostspec was found, so dest is remote */ + argv[argc] = path; + if (rsync_port) + daemon_connection = shell_cmd ? 1 : -1; + } + } + } else { /* read_batch */ + local_server = 1; + if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) { + rprintf(FERROR, "remote destination is not allowed with --read-batch\n"); + exit_cleanup(RERR_SYNTAX); + } + remote_argv = argv += argc - 1; + remote_argc = argc = 1; + rsync_port = 0; + } + + /* A local transfer doesn't unbackslash anything, so leave the args alone. */ + if (local_server) + old_style_args = 2; + + if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */ + *remote_argv = "."; + + if (am_sender) { + char *dummy_host; + int dummy_port = rsync_port; + int i; + if (!argv[0][0]) + goto invalid_empty; + /* For local source, extra source args must not have hostspec. */ + for (i = 1; i < argc; i++) { + if (!argv[i][0]) { + invalid_empty: + rprintf(FERROR, "Empty source arg specified.\n"); + exit_cleanup(RERR_SYNTAX); + } + if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) { + rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]); + exit_cleanup(RERR_SYNTAX); + } + } + } else { + char *dummy_host; + int dummy_port = rsync_port; + int i; + if (filesfrom_fd < 0) + add_implied_include(remote_argv[0], daemon_connection); + /* For remote source, any extra source args must have either + * the same hostname or an empty hostname. */ + for (i = 1; i < remote_argc; i++) { + char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port); + if (!arg) { + rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]); + rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n"); + exit_cleanup(RERR_SYNTAX); + } + if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) { + rprintf(FERROR, "All source args must come from the same machine.\n"); + exit_cleanup(RERR_SYNTAX); + } + if (rsync_port != dummy_port) { + if (!rsync_port || !dummy_port) + rprintf(FERROR, "All source args must use the same hostspec format.\n"); + else + rprintf(FERROR, "All source args must use the same port number.\n"); + exit_cleanup(RERR_SYNTAX); + } + if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */ + arg = "."; + remote_argv[i] = arg; + add_implied_include(arg, daemon_connection); + } + } + + if (rsync_port < 0) + rsync_port = RSYNC_PORT; + else + env_port = rsync_port; + + if (daemon_connection < 0) + return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv); + + if (password_file && !daemon_connection) { + rprintf(FERROR, "The --password-file option may only be " + "used when accessing an rsync daemon.\n"); + exit_cleanup(RERR_SYNTAX); + } + + if (connect_timeout) { + rprintf(FERROR, "The --contimeout option may only be " + "used when connecting to an rsync daemon.\n"); + exit_cleanup(RERR_SYNTAX); + } + + if (shell_machine) { + p = strrchr(shell_machine,'@'); + if (p) { + *p = 0; + shell_user = shell_machine; + shell_machine = p+1; + } + } + + if (DEBUG_GTE(CMD, 2)) { + rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n", + NS(shell_cmd), NS(shell_machine), NS(shell_user), + NS(remote_argv[0])); + } + +#ifdef HAVE_PUTENV + if (daemon_connection) + set_env_num("RSYNC_PORT", env_port); +#else + (void)env_port; +#endif + + pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc, &f_in, &f_out); + + /* if we're running an rsync server on the remote host over a + * remote shell command, we need to do the RSYNCD protocol first */ + if (daemon_connection) { + int tmpret; + tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv); + if (tmpret < 0) + return tmpret; + } + + ret = client_run(f_in, f_out, pid, argc, argv); + + fflush(stdout); + fflush(stderr); + + return ret; +} + + +static void sigusr1_handler(UNUSED(int val)) +{ + called_from_signal_handler = 1; + exit_cleanup(RERR_SIGNAL1); +} + +static void sigusr2_handler(UNUSED(int val)) +{ + if (!am_server) + output_summary(); + close_all(); + if (got_xfer_error) + _exit(RERR_PARTIAL); + _exit(0); +} + +#if defined SIGINFO || defined SIGVTALRM +static void siginfo_handler(UNUSED(int val)) +{ + if (!am_server && !INFO_GTE(PROGRESS, 1)) + want_progress_now = True; +} +#endif + +void remember_children(UNUSED(int val)) +{ +#ifdef WNOHANG + int cnt, status; + pid_t pid; + /* An empty waitpid() loop was put here by Tridge and we could never + * get him to explain why he put it in, so rather than taking it + * out we're instead saving the child exit statuses for later use. + * The waitpid() loop presumably eliminates all possibility of leaving + * zombie children, maybe that's why he did it. */ + while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { + /* save the child's exit status */ + for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { + if (pid_stat_table[cnt].pid == 0) { + pid_stat_table[cnt].pid = pid; + pid_stat_table[cnt].status = status; + break; + } + } + } +#endif +#ifndef HAVE_SIGACTION + signal(SIGCHLD, remember_children); +#endif +} + +/** + * This routine catches signals and tries to send them to gdb. + * + * Because it's called from inside a signal handler it ought not to + * use too many library routines. + * + * @todo Perhaps use "screen -X" instead/as well, to help people + * debugging without easy access to X. Perhaps use an environment + * variable, or just call a script? + * + * @todo The /proc/ magic probably only works on Linux (and + * Solaris?) Can we be more portable? + **/ +#ifdef MAINTAINER_MODE +const char *get_panic_action(void) +{ + const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION"); + + if (cmd_fmt) + return cmd_fmt; + return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d"; +} + +/** + * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION. + * + * This signal handler is only installed if we were configured with + * --enable-maintainer-mode. Perhaps it should always be on and we + * should just look at the environment variable, but I'm a bit leery + * of a signal sending us into a busy loop. + **/ +static void rsync_panic_handler(UNUSED(int whatsig)) +{ + char cmd_buf[300]; + int ret, pid_int = getpid(); + + snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int); + + /* Unless we failed to execute gdb, we allow the process to + * continue. I'm not sure if that's right. */ + ret = shell_exec(cmd_buf); + if (ret) + _exit(ret); +} +#endif + +static void unset_env_var(const char *var) +{ +#ifdef HAVE_UNSETENV + unsetenv(var); +#else +#ifdef HAVE_PUTENV + char *mem; + if (asprintf(&mem, "%s=", var) < 0) + out_of_memory("unset_env_var"); + putenv(mem); +#else + (void)var; +#endif +#endif +} + + +int main(int argc,char *argv[]) +{ + int ret; + + raw_argc = argc; + raw_argv = argv; + +#ifdef HAVE_SIGACTION +# ifdef HAVE_SIGPROCMASK + sigset_t sigmask; + + sigemptyset(&sigmask); +# endif + sigact.sa_flags = SA_NOCLDSTOP; +#endif + SIGACTMASK(SIGUSR1, sigusr1_handler); + SIGACTMASK(SIGUSR2, sigusr2_handler); + SIGACTMASK(SIGCHLD, remember_children); +#ifdef MAINTAINER_MODE + SIGACTMASK(SIGSEGV, rsync_panic_handler); + SIGACTMASK(SIGFPE, rsync_panic_handler); + SIGACTMASK(SIGABRT, rsync_panic_handler); + SIGACTMASK(SIGBUS, rsync_panic_handler); +#endif +#ifdef SIGINFO + SIGACTMASK(SIGINFO, siginfo_handler); +#endif +#ifdef SIGVTALRM + SIGACTMASK(SIGVTALRM, siginfo_handler); +#endif + + starttime = time(NULL); + our_uid = MY_UID(); + our_gid = MY_GID(); + am_root = our_uid == ROOT_UID; + + unset_env_var("DISPLAY"); + +#if defined USE_OPENSSL && defined SET_OPENSSL_CONF +#define TO_STR2(x) #x +#define TO_STR(x) TO_STR2(x) + /* ./configure --with-openssl-conf=/etc/ssl/openssl-rsync.cnf + * defines SET_OPENSSL_CONF as that unquoted pathname. */ + if (!getenv("OPENSSL_CONF")) /* Don't override it if it's already set. */ + set_env_str("OPENSSL_CONF", TO_STR(SET_OPENSSL_CONF)); +#undef TO_STR +#undef TO_STR2 +#endif + + memset(&stats, 0, sizeof(stats)); + + /* Even a non-daemon runs needs the default config values to be set, e.g. + * lp_dont_compress() is queried when no --skip-compress option is set. */ + reset_daemon_vars(); + + if (argc < 2) { + usage(FERROR); + exit_cleanup(RERR_SYNTAX); + } + + /* Get the umask for use in permission calculations. We no longer set + * it to zero; that is ugly and pointless now that all the callers that + * relied on it have been reeducated to work with default ACLs. */ + umask(orig_umask = umask(0)); + +#if defined CONFIG_LOCALE && defined HAVE_SETLOCALE + setlocale(LC_CTYPE, ""); + setlocale(LC_NUMERIC, ""); +#endif + + if (!parse_arguments(&argc, (const char ***) &argv)) { + option_error(); + exit_cleanup(RERR_SYNTAX); + } + if (write_batch + && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0) + out_of_memory("main"); + + SIGACTMASK(SIGINT, sig_int); + SIGACTMASK(SIGHUP, sig_int); + SIGACTMASK(SIGTERM, sig_int); +#if defined HAVE_SIGACTION && HAVE_SIGPROCMASK + sigprocmask(SIG_UNBLOCK, &sigmask, NULL); +#endif + + /* Ignore SIGPIPE; we consistently check error codes and will + * see the EPIPE. */ + SIGACTION(SIGPIPE, SIG_IGN); +#ifdef SIGXFSZ + SIGACTION(SIGXFSZ, SIG_IGN); +#endif + + /* Initialize change_dir() here because on some old systems getcwd + * (implemented by forking "pwd" and reading its output) doesn't + * work when there are other child processes. Also, on all systems + * that implement getcwd that way "pwd" can't be found after chroot. */ + change_dir(NULL, CD_NORMAL); + + if ((write_batch || read_batch) && !am_server) { + open_batch_files(); /* sets batch_fd */ + if (read_batch) + read_stream_flags(batch_fd); + else + write_stream_flags(batch_fd); + } + if (write_batch < 0) + dry_run = 1; + + if (am_server) { +#ifdef ICONV_CONST + setup_iconv(); +#endif + } else if (am_daemon) + return daemon_main(); + + if (am_server && protect_args) { + char buf[MAXPATHLEN]; + protect_args = 2; + read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL); + if (!parse_arguments(&argc, (const char ***) &argv)) { + option_error(); + exit_cleanup(RERR_SYNTAX); + } + } + + if (argc < 1) { + usage(FERROR); + exit_cleanup(RERR_SYNTAX); + } + + if (am_server) { + set_nonblocking(STDIN_FILENO); + set_nonblocking(STDOUT_FILENO); + if (am_daemon) + return start_daemon(STDIN_FILENO, STDOUT_FILENO); + start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); + } + + ret = start_client(argc, argv); + if (ret == -1) + exit_cleanup(RERR_STARTCLIENT); + else + exit_cleanup(ret); + + return ret; +} |