X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/94481d9113220ded7ee6a76a96fa468c79680478..0f78b81511be65d8fe21af1e6ac674f9e80ac29d:/main.c diff --git a/main.c b/main.c index a2733e64..1237447d 100644 --- a/main.c +++ b/main.c @@ -1,720 +1,1303 @@ -/* - Copyright (C) Andrew Tridgell 1996 - Copyright (C) Paul Mackerras 1996 - - 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 2 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, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ +/* + * The startup routines, including main(), for rsync. + * + * Copyright (C) 1996-2001 Andrew Tridgell + * Copyright (C) 1996 Paul Mackerras + * Copyright (C) 2001, 2002 Martin Pool + * Copyright (C) 2003, 2004, 2005, 2006 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ #include "rsync.h" +#if defined CONFIG_LOCALE && defined HAVE_LOCALE_H +#include +#endif + +extern int verbose; +extern int dry_run; +extern int list_only; +extern int am_root; +extern int am_server; +extern int am_sender; +extern int am_generator; +extern int am_daemon; +extern int blocking_io; +extern int remove_sent_files; +extern int daemon_over_rsh; +extern int need_messages_from_generator; +extern int kluge_around_eof; +extern int do_stats; +extern int log_got_error; +extern int module_id; +extern int copy_links; +extern int copy_dirlinks; +extern int keep_dirlinks; +extern int preserve_hard_links; +extern int protocol_version; +extern int recurse; +extern int relative_paths; +extern int rsync_port; +extern int whole_file; +extern int read_batch; +extern int write_batch; +extern int batch_fd; +extern int batch_gen_fd; +extern int filesfrom_fd; +extern pid_t cleanup_child_pid; +extern struct stats stats; +extern char *filesfrom_host; +extern char *rsync_path; +extern char *shell_cmd; +extern char *batch_name; + +int local_server = 0; +mode_t orig_umask = 0; +struct file_list *the_file_list; + +/* 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]; -int verbose = 0; -int always_checksum = 0; -time_t starttime; -off_t total_size = 0; -int block_size=BLOCK_SIZE; - -char *backup_suffix = BACKUP_SUFFIX; - -static char *rsync_path = RSYNC_NAME; - -int make_backups = 0; -int preserve_links = 0; -int preserve_perms = 0; -int preserve_devices = 0; -int preserve_uid = 0; -int preserve_gid = 0; -int preserve_times = 0; -int update_only = 0; -int cvs_exclude = 0; -int dry_run=0; -int local_server=0; -int ignore_times=0; -int delete_mode=0; -int one_file_system=0; - -int am_server = 0; -static int sender = 0; -int recurse = 0; - -static void usage(FILE *f); - -static void report(int f) +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) { - int in,out,tsize; - time_t t = time(NULL); - - if (!verbose) return; - - if (am_server && sender) { - write_int(f,read_total()); - write_int(f,write_total()); - write_int(f,total_size); - write_flush(f); - return; - } - - if (sender) { - in = read_total(); - out = write_total(); - tsize = (int)total_size; - } else { - in = read_int(f); - out = read_int(f); - tsize = read_int(f); - } - - printf("wrote %d bytes read %d bytes %g bytes/sec\n", - out,in,(in+out)/(0.5 + (t-starttime))); - printf("total size is %d speedup is %g\n", - tsize,(1.0*tsize)/(in+out)); + pid_t waited_pid = waitpid(pid, status_ptr, flags); + + 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; } +/* 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); +} -static void server_options(char **args,int *argc) +/* 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) { - int ac = *argc; - static char argstr[50]; - static char bsize[30]; - int i, x; - - args[ac++] = "--server"; - - if (!sender) - args[ac++] = "--sender"; - - x = 1; - argstr[0] = '-'; - for (i=0;i 1) { + /* These come out from every process */ + show_malloc_stats(); + show_flist_stats(); + } + + if (am_generator) + return; + + if (am_daemon) { + log_exit(0, __FILE__, __LINE__); + if (f == -1 || !am_sender) + return; + } + + if (am_server) { + if (am_sender) { + write_longint(f, total_read); + write_longint(f, total_written); + write_longint(f, stats.total_size); + if (protocol_version >= 29) { + write_longint(f, stats.flist_buildtime); + write_longint(f, stats.flist_xfertime); + } + } + 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_longint(f); + total_read = read_longint(f); + stats.total_size = read_longint(f); + if (protocol_version >= 29) { + stats.flist_buildtime = read_longint(f); + stats.flist_xfertime = read_longint(f); + } + } else if (write_batch) { + /* The --read-batch process is going to be a client + * receiver, so we need to give it the stats. */ + write_longint(batch_fd, total_read); + write_longint(batch_fd, total_written); + write_longint(batch_fd, stats.total_size); + if (protocol_version >= 29) { + write_longint(batch_fd, stats.flist_buildtime); + write_longint(batch_fd, stats.flist_xfertime); + } + } } +static void output_summary(void) +{ + if (do_stats) { + rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files); + rprintf(FINFO,"Number of files transferred: %d\n", + stats.num_transferred_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: %d\n", stats.flist_size); + if (stats.flist_buildtime) { + rprintf(FINFO, + "File list generation time: %.3f seconds\n", + (double)stats.flist_buildtime / 1000); + rprintf(FINFO, + "File list transfer time: %.3f seconds\n", + (double)stats.flist_xfertime / 1000); + } + rprintf(FINFO,"Total bytes sent: %s\n", + human_num(total_written)); + rprintf(FINFO,"Total bytes received: %s\n", + human_num(total_read)); + } + + if (verbose || do_stats) { + rprintf(FINFO, + "\nsent %s bytes received %s bytes %s bytes/sec\n", + human_num(total_written), human_num(total_read), + human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2)); + rprintf(FINFO, "total size is %s speedup is %.2f\n", + human_num(stats.total_size), + (double)stats.total_size / (total_written+total_read)); + } + + fflush(stdout); + fflush(stderr); +} -int do_cmd(char *cmd,char *machine,char *user,char *path,int *f_in,int *f_out) +/** + * If our C library can get malloc statistics, then show them to FINFO + **/ +static void show_malloc_stats(void) { - char *args[100]; - int i,argc=0; - char *tok,*p; - - if (!local_server) { - if (!cmd) - cmd = getenv(RSYNC_RSH_ENV); - if (!cmd) - cmd = RSYNC_RSH; - cmd = strdup(cmd); - if (!cmd) - goto oom; - - for (tok=strtok(cmd," ");tok;tok=strtok(NULL," ")) { - args[argc++] = tok; - } - - if (user) { - args[argc++] = "-l"; - args[argc++] = user; - } - args[argc++] = machine; - } - - args[argc++] = rsync_path; - - server_options(args,&argc); - - if (path && *path) { - char *dir = strdup(path); - p = strrchr(dir,'/'); - if (p) { - *p = 0; - args[argc++] = dir; - p++; - } else { - args[argc++] = "."; - p = dir; - } - if (p[0]) - args[argc++] = path; - } - - args[argc] = NULL; - - if (verbose > 3) { - fprintf(stderr,"cmd="); - for (i=0;i= MAX_ARGS - MAX_SERVER_ARGS) { + rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); + exit_cleanup(RERR_SYNTAX); + } + 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'; + } + + /* 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_over_rsh && dash_l_set)) { + args[argc++] = "-l"; + args[argc++] = user; + } +#else + if (user && !(daemon_over_rsh && dash_l_set)) { + args[argc++] = "-l"; + args[argc++] = user; + } + args[argc++] = machine; +#endif + + args[argc++] = rsync_path; + + if (blocking_io < 0) { + char *cp; + if ((cp = strrchr(cmd, '/')) != NULL) + cp++; + else + cp = cmd; + if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0) + blocking_io = 1; + } + + server_options(args,&argc); + + if (argc >= MAX_ARGS - 2) { + rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); + exit_cleanup(RERR_SYNTAX); + } + } + + args[argc++] = "."; + + if (!daemon_over_rsh && path && *path) + args[argc++] = path; + args[argc] = NULL; -static char *get_local_name(struct file_list *flist,char *name) + if (verbose > 3) { + for (i = 0; i < argc; i++) + rprintf(FINFO, "cmd[%d]=%s ", i, args[i]); + rprintf(FINFO, "\n"); + } + + if (read_batch) { + int from_gen_pipe[2]; + if (fd_pair(from_gen_pipe) < 0) { + rsyserr(FERROR, errno, "pipe"); + exit_cleanup(RERR_IPC); + } + batch_gen_fd = from_gen_pipe[0]; + *f_out = from_gen_pipe[1]; + *f_in = batch_fd; + ret = -1; /* no child pid */ + } 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; + ret = local_child(argc, args, f_in, f_out, child_main); + } else + ret = piped_child(args,f_in,f_out); + + if (dir) + free(dir); + + return ret; + + oom: + out_of_memory("do_cmd"); + return 0; /* not reached */ +} + +/* 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 and return + * either a NULL for mode 1, or the local-name for mode 2. We also + * change directory if there are any path components in dest_path. */ +static char *get_local_name(struct file_list *flist, char *dest_path) { - struct stat st; - - if (stat(name,&st) == 0) { - if (S_ISDIR(st.st_mode)) { - if (chdir(name) != 0) { - fprintf(stderr,"chdir %s : %s\n",name,strerror(errno)); - exit(1); - } - return NULL; - } - if (flist->count > 1) { - fprintf(stderr,"ERROR: destination must be a directory when copying more than 1 file\n"); - exit(1); - } - return name; - } - - if (flist->count == 1) - return name; - - if (!name) - return NULL; - - if (mkdir(name,0777) != 0) { - fprintf(stderr,"mkdir %s : %s\n",name,strerror(errno)); - exit(1); - } else { - fprintf(am_server?stderr:stdout,"created directory %s\n",name); - } - - if (chdir(name) != 0) { - fprintf(stderr,"chdir %s : %s\n",name,strerror(errno)); - exit(1); - } - - return NULL; + STRUCT_STAT st; + char *cp; + + if (verbose > 2) { + rprintf(FINFO, "get_local_name count=%d %s\n", + flist->count, NS(dest_path)); + } + + if (!dest_path || list_only) + return NULL; + + /* If the destination path refers to an existing directory, enter + * it and use mode 1. If there is something other than a directory + * at the destination path, we must be transferring one file + * (anything at the destination will be overwritten). */ + if (do_stat(dest_path, &st) == 0) { + if (S_ISDIR(st.st_mode)) { + if (!push_dir(dest_path)) { + rsyserr(FERROR, errno, "push_dir#1 %s failed", + full_fname(dest_path)); + exit_cleanup(RERR_FILESELECT); + } + return NULL; + } + if (flist->count > 1) { + rprintf(FERROR, + "ERROR: destination must be a directory when" + " copying more than 1 file\n"); + exit_cleanup(RERR_FILESELECT); + } + /* Caution: flist->count could be 0! */ + if (flist->count == 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) { + rsyserr(FERROR, errno, "cannot stat destination %s", + full_fname(dest_path)); + exit_cleanup(RERR_FILESELECT); + } + + cp = strrchr(dest_path, '/'); + + /* If the destination path ends in a slash or we are transferring + * multiple files, create a directory at the destination path, + * enter the new directory, and use mode 1. */ + if (flist->count > 1 || (cp && !cp[1])) { + /* Lop off the final slash (if any). */ + if (cp && !cp[1]) + *cp = '\0'; + + if (mkdir_defmode(dest_path) != 0) { + rsyserr(FERROR, errno, "mkdir %s failed", + full_fname(dest_path)); + exit_cleanup(RERR_FILEIO); + } + + if (verbose) + rprintf(FINFO, "created directory %s\n", dest_path); + + if (dry_run) { + /* Indicate that the destination directory doesn't + * really exist and return mode 1. */ + dry_run++; + return NULL; + } + + if (!push_dir(dest_path)) { + rsyserr(FERROR, errno, "push_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 (!push_dir(dest_path)) { + rsyserr(FERROR, errno, "push_dir#3 %s failed", + full_fname(dest_path)); + exit_cleanup(RERR_FILESELECT); + } + *cp = '/'; + + return cp + 1; } +/* This is only called by the sender. */ +static void read_final_goodbye(int f_in, int f_out) +{ + int i; + + if (protocol_version < 29) + i = read_int(f_in); + else { + while ((i = read_int(f_in)) == the_file_list->count + && read_shortint(f_in) == ITEM_IS_NEW) { + /* Forward the keep-alive (no-op) to the receiver. */ + write_int(f_out, the_file_list->count); + write_shortint(f_out, ITEM_IS_NEW); + } + } + if (i != -1) { + rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n", + i, who_am_i()); + exit_cleanup(RERR_PROTOCOL); + } +} -void do_server_sender(int argc,char *argv[]) + +static void do_server_sender(int f_in, int f_out, int argc, char *argv[]) { - int i; - char *dir = argv[0]; - struct file_list *flist; - - if (verbose > 2) - fprintf(stderr,"server_sender starting pid=%d\n",(int)getpid()); - - if (chdir(dir) != 0) { - fprintf(stderr,"chdir %s: %s\n",dir,strerror(errno)); - exit(1); - } - argc--; - argv++; - - if (strcmp(dir,".")) { - int l = strlen(dir); - for (i=0;i 2) { + rprintf(FINFO, "server_sender starting pid=%ld\n", + (long)getpid()); + } + + if (am_daemon && lp_write_only(module_id)) { + rprintf(FERROR, "ERROR: module is write only\n"); + exit_cleanup(RERR_SYNTAX); + return; + } + if (am_daemon && lp_read_only(module_id) && remove_sent_files) { + rprintf(FERROR, + "ERROR: --remove-sent-files cannot be used with a read-only module\n"); + exit_cleanup(RERR_SYNTAX); + return; + } + + if (!relative_paths && !push_dir(dir)) { + rsyserr(FERROR, errno, "push_dir#3 %s failed", + full_fname(dir)); + exit_cleanup(RERR_FILESELECT); + } + argc--; + argv++; + + if (argc == 0 && (recurse || list_only)) { + argc = 1; + argv--; + argv[0] = "."; + } + + flist = send_file_list(f_out,argc,argv); + if (!flist || flist->count == 0) { + exit_cleanup(0); + } + the_file_list = flist; + + io_start_buffering_in(); + io_start_buffering_out(); + + send_files(flist,f_out,f_in); + 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,struct file_list *flist,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 = 0; + + if (preserve_hard_links) + init_hard_links(); + + if (fd_pair(error_pipe) < 0) { + rsyserr(FERROR, errno, "pipe failed in do_recv"); + exit_cleanup(RERR_IPC); + } + + io_flush(NORMAL_FLUSH); + + if ((pid = do_fork()) == -1) { + rsyserr(FERROR, errno, "fork failed in do_recv"); + exit_cleanup(RERR_IPC); + } + + if (pid == 0) { + close(error_pipe[0]); + if (f_in != f_out) + close(f_out); + + /* we can't let two processes write to the socket at one time */ + close_multiplexing_out(); -void do_server_recv(int argc,char *argv[]) + /* set place to send errors */ + set_msg_fd_out(error_pipe[1]); + + recv_files(f_in, flist, local_name); + io_flush(FULL_FLUSH); + handle_stats(f_in); + + send_msg(MSG_DONE, "", 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. */ + while (read_int(f_in) == flist->count + && read_shortint(f_in) == ITEM_IS_NEW) {} + + 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; + close_multiplexing_in(); + if (write_batch && !am_server) + stop_write_batch(); + + close(error_pipe[1]); + if (f_in != f_out) + close(f_in); + + io_start_buffering_out(); + + set_msg_fd_in(error_pipe[0]); + + generate_files(f_out, flist, local_name); + + handle_stats(-1); + io_flush(FULL_FLUSH); + if (protocol_version >= 24) { + /* send a final goodbye message */ + write_int(f_out, -1); + } + io_flush(FULL_FLUSH); + + set_msg_fd_in(-1); + 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 pid,status; - char *dir = NULL; - struct file_list *flist; - char *local_name=NULL; - - if (verbose > 2) - fprintf(stderr,"server_recv(%d) starting pid=%d\n",argc,(int)getpid()); - - if (argc > 0) { - dir = argv[0]; - argc--; - argv++; - if (chdir(dir) != 0) { - fprintf(stderr,"chdir %s : %s\n",dir,strerror(errno)); - exit(1); - } - } - - if (delete_mode) - recv_exclude_list(STDIN_FILENO); - - flist = recv_file_list(STDIN_FILENO); - if (!flist || flist->count == 0) { - fprintf(stderr,"nothing to do\n"); - exit(1); - } - - if (argc > 0) { - if (strcmp(dir,".")) { - argv[0] += strlen(dir); - if (argv[0][0] == '/') argv[0]++; - } - local_name = get_local_name(flist,argv[0]); - } - - if ((pid=fork()) == 0) { - recv_files(STDIN_FILENO,flist,local_name); - if (verbose > 2) - fprintf(stderr,"receiver read %d\n",read_total()); - exit(0); - } - - generate_files(STDOUT_FILENO,flist,local_name); - - waitpid(pid, &status, 0); - exit(status); + int exit_code; + struct file_list *flist; + char *local_name = NULL; + char *dir = NULL; + int save_verbose = verbose; + + if (filesfrom_fd >= 0) { + /* We can't mix messages with files-from data on the socket, + * so temporarily turn off verbose messages. */ + verbose = 0; + } + + if (verbose > 2) { + rprintf(FINFO, "server_recv(%d) starting pid=%ld\n", + argc, (long)getpid()); + } + + if (am_daemon && lp_read_only(module_id)) { + rprintf(FERROR,"ERROR: module is read only\n"); + exit_cleanup(RERR_SYNTAX); + return; + } + + if (argc > 0) { + dir = argv[0]; + argc--; + argv++; + if (!am_daemon && !push_dir(dir)) { + rsyserr(FERROR, errno, "push_dir#4 %s failed", + full_fname(dir)); + exit_cleanup(RERR_FILESELECT); + } + } + + io_start_buffering_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. */ + io_set_filesfrom_fds(filesfrom_fd, f_out); + filesfrom_fd = -1; + } + + flist = recv_file_list(f_in); + verbose = save_verbose; + if (!flist) { + rprintf(FERROR,"server_recv: recv_file_list error\n"); + exit_cleanup(RERR_FILESELECT); + } + the_file_list = flist; + + if (argc > 0) + local_name = get_local_name(flist,argv[0]); + + exit_code = do_recv(f_in,f_out,flist,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 defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H + setup_iconv(); +#endif + + if (protocol_version >= 23) + io_start_multiplex_out(); + + if (am_sender) { + keep_dirlinks = 0; /* Must be disabled on the sender. */ + if (need_messages_from_generator) + io_start_multiplex_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); } -static void usage(FILE *f) +/* + * 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); +#if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H + setup_iconv(); +#endif + + if (protocol_version >= 23 && !read_batch) + io_start_multiplex_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. */ + io_start_buffering_out(); + if (!filesfrom_host) + set_msg_fd_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); + flist = send_file_list(f_out, argc, argv); + set_msg_fd_in(-1); + if (verbose > 3) + rprintf(FINFO,"file list sent\n"); + the_file_list = flist; + + io_flush(NORMAL_FLUSH); + send_files(flist,f_out,f_in); + io_flush(FULL_FLUSH); + handle_stats(-1); + if (protocol_version >= 24) + read_final_goodbye(f_in, f_out); + if (pid != -1) { + if (verbose > 3) + 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 (need_messages_from_generator && !read_batch) + io_start_multiplex_out(); + + if (argc == 0) + list_only |= 1; + + send_filter_list(read_batch ? -1 : f_out); + + if (filesfrom_fd >= 0) { + io_set_filesfrom_fds(filesfrom_fd, f_out); + filesfrom_fd = -1; + } + + if (write_batch && !am_server) + start_write_batch(f_in); + flist = recv_file_list(f_in); + the_file_list = flist; + + if (flist && flist->count > 0) { + local_name = get_local_name(flist, argv[0]); + + exit_code2 = do_recv(f_in, f_out, flist, local_name); + } else { + handle_stats(-1); + output_summary(); + } + + if (pid != -1) { + if (verbose > 3) + 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 int copy_argv (char *argv[]) { - fprintf(f,"rsync version %s Copyright Andrew Tridgell and Paul Mackerras\n\n", - VERSION); - fprintf(f,"Usage:\t%s [options] src user@host:dest\nOR",RSYNC_NAME); - fprintf(f,"\t%s [options] user@host:src dest\n\n",RSYNC_NAME); - fprintf(f,"Options:\n"); - fprintf(f,"-v, --verbose increase verbosity\n"); - fprintf(f,"-c, --checksum always checksum\n"); - fprintf(f,"-a, --archive archive mode (same as -rlptDog)\n"); - fprintf(f,"-r, --recursive recurse into directories\n"); - fprintf(f,"-b, --backup make backups (default ~ extension)\n"); - fprintf(f,"-u, --update update only (don't overwrite newer files)\n"); - fprintf(f,"-l, --links preserve soft links\n"); - fprintf(f,"-p, --perms preserve permissions\n"); - fprintf(f,"-o, --owner preserve owner (root only)\n"); - fprintf(f,"-g, --group preserve group\n"); - fprintf(f,"-D, --devices preserve devices (root only)\n"); - fprintf(f,"-t, --times preserve times\n"); - fprintf(f,"-n, --dry-run show what would have been transferred\n"); - fprintf(f,"-x, --one-file-system don't cross filesystem boundaries\n"); - fprintf(f,"-B, --block-size SIZE checksum blocking size\n"); - fprintf(f,"-e, --rsh COMMAND specify rsh replacement\n"); - fprintf(f," --rsync-path PATH specify path to rsync on the remote machine\n"); - fprintf(f,"-C, --cvs-exclude auto ignore files in the same way CVS does\n"); - fprintf(f," --delete delete files that don't exist on the sending side\n"); - fprintf(f,"-I, --ignore-times don't exclude files that match length and time\n"); - fprintf(f," --exclude FILE exclude file FILE\n"); - fprintf(f," --exclude-from FILE exclude files listed in FILE\n"); - fprintf(f," --suffix SUFFIX override backup suffix\n"); - fprintf(f," --version print version number\n"); - - fprintf(f,"\n"); - fprintf(f,"the backup suffix defaults to %s\n",BACKUP_SUFFIX); - fprintf(f,"the block size defaults to %d\n",BLOCK_SIZE); + int i; + + for (i = 0; argv[i]; i++) { + if (!(argv[i] = strdup(argv[i]))) { + rprintf (FERROR, "out of memory at %s(%d)\n", + __FILE__, __LINE__); + return RERR_MALLOC; + } + } + + return 0; } -enum {OPT_VERSION,OPT_SUFFIX,OPT_SENDER,OPT_SERVER,OPT_EXCLUDE, - OPT_EXCLUDE_FROM,OPT_DELETE,OPT_RSYNC_PATH}; - -static char *short_options = "oblpguDCtcahvrIxne:B:"; - -static struct option long_options[] = { - {"version", 0, 0, OPT_VERSION}, - {"server", 0, 0, OPT_SERVER}, - {"sender", 0, 0, OPT_SENDER}, - {"delete", 0, 0, OPT_DELETE}, - {"exclude", 1, 0, OPT_EXCLUDE}, - {"exclude-from",1, 0, OPT_EXCLUDE_FROM}, - {"rsync-path", 1, 0, OPT_RSYNC_PATH}, - {"one-file-system",0, 0, 'x'}, - {"ignore-times",0, 0, 'I'}, - {"help", 0, 0, 'h'}, - {"dry-run", 0, 0, 'n'}, - {"cvs-exclude", 0, 0, 'C'}, - {"archive", 0, 0, 'a'}, - {"checksum", 0, 0, 'c'}, - {"backup", 0, 0, 'b'}, - {"update", 0, 0, 'u'}, - {"verbose", 0, 0, 'v'}, - {"recursive", 0, 0, 'r'}, - {"devices", 0, 0, 'D'}, - {"perms", 0, 0, 'p'}, - {"links", 0, 0, 'l'}, - {"owner", 0, 0, 'o'}, - {"group", 0, 0, 'g'}, - {"times", 0, 0, 't'}, - {"rsh", 1, 0, 'e'}, - {"suffix", 1, 0, OPT_SUFFIX}, - {"block-size", 1, 0, 'B'}, - {0,0,0,0}}; + +/** + * 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; + char *shell_machine = NULL; + char *shell_path = NULL; + char *shell_user = NULL; + int ret; + pid_t pid; + int f_in,f_out; + int rc; + + /* Don't clobber argv[] so that ps(1) can still show the right + * command line. */ + if ((rc = copy_argv(argv))) + return rc; + + if (!read_batch) { /* for read_batch, NO source is specified */ + shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port); + if (shell_path) { /* source is remote */ + char *dummy1; + int dummy2; + if (--argc + && check_for_hostspec(argv[argc], &dummy1, &dummy2)) { + rprintf(FERROR, + "The source and destination cannot both be remote.\n"); + exit_cleanup(RERR_SYNTAX); + } + argv++; + 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); + } + if (rsync_port) { + if (!shell_cmd) { + return start_socket_client(shell_machine, + shell_path, + argc, argv); + } + daemon_over_rsh = 1; + } + + am_sender = 0; + } else { /* source is local, check dest arg */ + am_sender = 1; + + if (argc > 1) + p = argv[--argc]; + else { + p = "."; + list_only = 1; + } + + shell_path = check_for_hostspec(p, &shell_machine, &rsync_port); + if (shell_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 (!shell_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; + shell_path = p; + } else if (rsync_port) { + if (!shell_cmd) { + return start_socket_client(shell_machine, + shell_path, + argc, argv); + } + daemon_over_rsh = 1; + } + } + } else { /* read_batch */ + local_server = 1; + shell_path = argv[argc-1]; + if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) { + rprintf(FERROR, "remote destination is not allowed with --read-batch\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 (verbose > 3) { + rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n", + shell_cmd ? shell_cmd : "", + shell_machine ? shell_machine : "", + shell_user ? shell_user : "", + shell_path ? shell_path : ""); + } + + /* for remote source, only single dest arg can remain ... */ + if (!am_sender && argc > 1) { + usage(FERROR); + exit_cleanup(RERR_SYNTAX); + } + + /* ... or no dest at all */ + if (!am_sender && argc == 0) + list_only |= 1; + + pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path, + &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_over_rsh) { + int tmpret; + tmpret = start_inband_exchange(shell_user, shell_path, + f_in, f_out, argc); + if (tmpret < 0) + return tmpret; + } + + ret = client_run(f_in, f_out, pid, argc, argv); + + fflush(stdout); + fflush(stderr); + + return ret; +} + + +static RETSIGTYPE sigusr1_handler(UNUSED(int val)) +{ + exit_cleanup(RERR_SIGNAL1); +} + +static RETSIGTYPE sigusr2_handler(UNUSED(int val)) +{ + if (!am_server) + output_summary(); + close_all(); + if (log_got_error) + _exit(RERR_PARTIAL); + _exit(0); +} + +RETSIGTYPE 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; + else + 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 RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig)) +{ + char cmd_buf[300]; + int ret; + + sprintf(cmd_buf, get_panic_action(), + getpid(), getpid()); + + /* Unless we failed to execute gdb, we allow the process to + * continue. I'm not sure if that's right. */ + ret = system(cmd_buf); + if (ret) + _exit(ret); +} +#endif + int main(int argc,char *argv[]) { - int pid, status, pid2, status2; - int opt; - int option_index; - char *shell_cmd = NULL; - char *shell_machine = NULL; - char *shell_path = NULL; - char *shell_user = NULL; - char *p; - int f_in,f_out; - struct file_list *flist; - char *local_name = NULL; - - starttime = time(NULL); - - while ((opt = getopt_long(argc, argv, - short_options, long_options, &option_index)) - != -1) { - switch (opt) - { - case OPT_VERSION: - printf("rsync version %s protocol version %d\n", - VERSION,PROTOCOL_VERSION); - exit(0); - - case OPT_SUFFIX: - backup_suffix = optarg; - break; - - case OPT_RSYNC_PATH: - rsync_path = optarg; - break; - - case 'I': - ignore_times = 1; - break; - - case 'x': - one_file_system=1; - break; - - case OPT_DELETE: - delete_mode = 1; - break; - - case OPT_EXCLUDE: - add_exclude(optarg); - break; - - case OPT_EXCLUDE_FROM: - add_exclude_file(optarg,1); - break; - - case 'h': - usage(stdout); - exit(0); - - case 'b': - make_backups=1; - break; - - case 'n': - dry_run=1; - break; - - case 'C': - cvs_exclude=1; - break; - - case 'u': - update_only=1; - break; - -#if SUPPORT_LINKS - case 'l': - preserve_links=1; - break; + int ret; + int orig_argc = argc; + char **orig_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 + + starttime = time(NULL); + am_root = (MY_UID() == 0); + + memset(&stats, 0, sizeof(stats)); - case 'p': - preserve_perms=1; - break; - - case 'o': - if (getuid() == 0) { - preserve_uid=1; - } else { - fprintf(stderr,"-o only allowed for root\n"); - exit(1); - } - break; - - case 'g': - preserve_gid=1; - break; - - case 'D': - if (getuid() == 0) { - preserve_devices=1; - } else { - fprintf(stderr,"-D only allowed for root\n"); - exit(1); - } - break; - - case 't': - preserve_times=1; - break; - - case 'c': - always_checksum=1; - break; - - case 'v': - verbose++; - break; - - case 'a': - recurse=1; -#if SUPPORT_LINKS - preserve_links=1; + if (argc < 2) { + usage(FERROR); + exit_cleanup(RERR_SYNTAX); + } + + /* we set a 0 umask so that correct file permissions can be + * carried across */ + orig_umask = umask(0); + +#if defined CONFIG_LOCALE && defined HAVE_SETLOCALE + setlocale(LC_CTYPE, ""); #endif - preserve_perms=1; - preserve_times=1; - preserve_gid=1; - if (getuid() == 0) { - preserve_devices=1; - preserve_uid=1; - } - break; - - case OPT_SERVER: - am_server = 1; - break; - - case OPT_SENDER: - if (!am_server) { - usage(stderr); - exit(1); - } - sender = 1; - break; - - case 'r': - recurse = 1; - break; - - case 'e': - shell_cmd = optarg; - break; - - case 'B': - block_size = atoi(optarg); - break; - - default: - fprintf(stderr,"bad option -%c\n",opt); - exit(1); - } - } - - while (optind--) { - argc--; - argv++; - } - - if (dry_run) - verbose = MAX(verbose,1); - - if (am_server) { - int version = read_int(STDIN_FILENO); - if (version != PROTOCOL_VERSION) { - fprintf(stderr,"protocol version mismatch %d %d\n", - version,PROTOCOL_VERSION); - exit(1); - } - write_int(STDOUT_FILENO,PROTOCOL_VERSION); - write_flush(STDOUT_FILENO); - - if (sender) { - recv_exclude_list(STDIN_FILENO); - if (cvs_exclude) - add_cvs_excludes(); - do_server_sender(argc,argv); - } else { - do_server_recv(argc,argv); - } - exit(0); - } - - if (argc < 2) { - usage(stderr); - exit(1); - } - - p = strchr(argv[0],':'); - - if (p) { - sender = 0; - *p = 0; - shell_machine = argv[0]; - shell_path = p+1; - argc--; - argv++; - } else { - sender = 1; - - p = strchr(argv[argc-1],':'); - if (!p) { - local_server = 1; - } - - if (local_server) { - shell_machine = NULL; - shell_path = argv[argc-1]; - } else { - *p = 0; - shell_machine = argv[argc-1]; - shell_path = p+1; - } - argc--; - } - - if (shell_machine) { - p = strchr(shell_machine,'@'); - if (p) { - *p = 0; - shell_user = shell_machine; - shell_machine = p+1; - } - } - - if (verbose > 3) { - fprintf(stderr,"cmd=%s machine=%s user=%s path=%s\n", - shell_cmd?shell_cmd:"", - shell_machine?shell_machine:"", - shell_user?shell_user:"", - shell_path?shell_path:""); - } - - signal(SIGCHLD,SIG_IGN); - signal(SIGINT,SIGNAL_CAST sig_int); - - if (!sender && argc != 1) { - usage(stderr); - exit(1); - } - - pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,&f_in,&f_out); - - write_int(f_out,PROTOCOL_VERSION); - write_flush(f_out); - { - int version = read_int(f_in); - if (version != PROTOCOL_VERSION) { - fprintf(stderr,"protocol version mismatch\n"); - exit(1); - } - } - - if (verbose > 3) - fprintf(stderr,"parent=%d child=%d sender=%d recurse=%d\n", - (int)getpid(),pid,sender,recurse); - - if (sender) { - if (cvs_exclude) - add_cvs_excludes(); - if (delete_mode) - send_exclude_list(f_out); - flist = send_file_list(f_out,recurse,argc,argv); - if (verbose > 3) - fprintf(stderr,"file list sent\n"); - send_files(flist,f_out,f_in); - if (verbose > 3) - fprintf(stderr,"waiting on %d\n",pid); - waitpid(pid, &status, 0); - report(-1); - exit(status); - } - - send_exclude_list(f_out); - - flist = recv_file_list(f_in); - if (!flist || flist->count == 0) { - fprintf(stderr,"nothing to do\n"); - exit(0); - } - - local_name = get_local_name(flist,argv[0]); - - if ((pid2=fork()) == 0) { - recv_files(f_in,flist,local_name); - if (verbose > 1) - fprintf(stderr,"receiver read %d\n",read_total()); - exit(0); - } - - generate_files(f_out,flist,local_name); - - waitpid(pid2, &status2, 0); - - report(f_in); - - waitpid(pid, &status, 0); - - return status | status2; + + if (!parse_arguments(&argc, (const char ***) &argv, 1)) { + /* FIXME: We ought to call the same error-handling + * code here, rather than relying on getopt. */ + option_error(); + exit_cleanup(RERR_SYNTAX); + } + + 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 push_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. */ + push_dir(NULL); + + init_flist(); + + if ((write_batch || read_batch) && !am_server) { + if (write_batch) + write_batch_shell_file(orig_argc, orig_argv, argc); + + if (read_batch && strcmp(batch_name, "-") == 0) + batch_fd = STDIN_FILENO; + else { + batch_fd = do_open(batch_name, + write_batch ? O_WRONLY | O_CREAT | O_TRUNC + : O_RDONLY, S_IRUSR | S_IWUSR); + } + if (batch_fd < 0) { + rsyserr(FERROR, errno, "Batch file %s open error", + full_fname(batch_name)); + exit_cleanup(RERR_FILEIO); + } + if (read_batch) + read_stream_flags(batch_fd); + } + if (write_batch < 0) + dry_run = 1; + + if (am_daemon && !am_server) + return daemon_main(); + + 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; }