/* -*- c-file-style: "linux" -*- Copyright (C) 1996-2001 by Andrew Tridgell Copyright (C) Paul Mackerras 1996 Copyright (C) 2001, 2002 by Martin Pool 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. */ #include "rsync.h" time_t starttime = 0; extern struct stats stats; extern int am_root; extern int am_server; extern int am_sender; extern int am_generator; extern int am_daemon; extern int verbose; extern int blocking_io; extern int cvs_exclude; extern int delete_mode; extern int delete_excluded; extern int delete_after; extern int daemon_over_rsh; extern int do_stats; extern int dry_run; extern int list_only; extern int local_server; extern int log_got_error; extern int module_id; extern int orig_umask; extern int preserve_hard_links; extern int protocol_version; extern int recurse; extern int relative_paths; extern int rsync_port; extern int read_batch; extern int write_batch; extern int filesfrom_fd; extern pid_t cleanup_child_pid; extern char *files_from; extern char *remote_filesfrom_file; extern char *rsync_path; extern char *shell_cmd; extern struct file_list *batch_flist; /* there's probably never more than at most 2 outstanding child processes, * but set it higher just in case. */ #define MAXCHILDPROCS 5 struct pid_status { pid_t pid; int status; } pid_stat_table[MAXCHILDPROCS]; static void show_malloc_stats(void); /**************************************************************************** wait for a process to exit, calling io_flush while waiting ****************************************************************************/ void wait_process(pid_t pid, int *status) { pid_t waited_pid; int cnt; while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) { msleep(20); io_flush(FULL_FLUSH); } if ((waited_pid == -1) && (errno == ECHILD)) { /* status of requested child no longer available. * check to see if it was processed by the sigchld_handler. */ for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { if (pid == pid_stat_table[cnt].pid) { *status = pid_stat_table[cnt].status; pid_stat_table[cnt].pid = 0; break; } } } /* 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 thhey know something went * wrong. */ *status = WEXITSTATUS(*status); } static void report(int f) { time_t t = time(NULL); int send_stats; if (do_stats && verbose > 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; } send_stats = verbose || protocol_version >= 20; if (am_server) { if (am_sender && send_stats) { int64 w; /* store total_written in a temporary * because write_longint changes it */ w = stats.total_written; write_longint(f,stats.total_read); write_longint(f,w); write_longint(f,stats.total_size); } return; } /* this is the client */ if (!am_sender && send_stats) { int64 r; stats.total_written = read_longint(f); /* store total_read in a temporary, read_longint changes it */ r = read_longint(f); stats.total_size = read_longint(f); stats.total_read = r; } if (do_stats) { if (!am_sender && !send_stats) { /* missing the bytes written by the generator */ rprintf(FINFO, "\nCannot show stats as receiver because remote protocol version is less than 20\n"); rprintf(FINFO, "Use --stats -v to show stats\n"); return; } 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: %.0f bytes\n", (double)stats.total_size); rprintf(FINFO,"Total transferred file size: %.0f bytes\n", (double)stats.total_transferred_size); rprintf(FINFO,"Literal data: %.0f bytes\n", (double)stats.literal_data); rprintf(FINFO,"Matched data: %.0f bytes\n", (double)stats.matched_data); rprintf(FINFO,"File list size: %d\n", stats.flist_size); rprintf(FINFO,"Total bytes written: %.0f\n", (double)stats.total_written); rprintf(FINFO,"Total bytes read: %.0f\n", (double)stats.total_read); } if (verbose || do_stats) { rprintf(FINFO,"\nwrote %.0f bytes read %.0f bytes %.2f bytes/sec\n", (double)stats.total_written, (double)stats.total_read, (stats.total_written+stats.total_read)/(0.5 + (t-starttime))); rprintf(FINFO,"total size is %.0f speedup is %.2f\n", (double)stats.total_size, (1.0*stats.total_size)/(stats.total_written+stats.total_read)); } fflush(stdout); fflush(stderr); } /** * If our C library can get malloc statistics, then show them to FINFO **/ static void show_malloc_stats(void) { #ifdef HAVE_MALLINFO struct mallinfo mi; mi = mallinfo(); rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n", getpid(), am_server ? "server " : "", am_daemon ? "daemon " : "", who_am_i()); rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena); rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks); rprintf(FINFO, " smblks: %10d\n", mi.smblks); rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks); rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd); rprintf(FINFO, " allmem: %10d (bytes from sbrk + mmap)\n", mi.arena + mi.hblkhd); rprintf(FINFO, " usmblks: %10d\n", mi.usmblks); rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks); rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks); rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks); rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost); #endif /* HAVE_MALLINFO */ } /* Start the remote shell. cmd may be NULL to use the default. */ static pid_t do_cmd(char *cmd, char *machine, char *user, char *path, int *f_in, int *f_out) { int i, argc = 0; char *args[100]; pid_t ret; char *tok, *dir = NULL; int dash_l_set = 0; if (!read_batch && !local_server) { char *rsh_env = getenv(RSYNC_RSH_ENV); if (!cmd) cmd = 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; /* 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; } #if 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); } args[argc++] = "."; if (!daemon_over_rsh && path && *path) args[argc++] = path; if (argc >= (int)(sizeof args / sizeof args[0])) { rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); exit_cleanup(RERR_MALLOC); /* XXX Need better RERR? */ } args[argc] = NULL; if (verbose > 3) { rprintf(FINFO,"cmd="); for (i=0;i 2) rprintf(FINFO,"get_local_name count=%d %s\n", flist->count, NS(name)); if (!name) return NULL; if (do_stat(name,&st) == 0) { if (S_ISDIR(st.st_mode)) { if (!push_dir(name)) { rprintf(FERROR, "push_dir %s failed: %s (1)\n", full_fname(name), strerror(errno)); 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); } return name; } if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/')) return name; if (do_mkdir(name,0777 & ~orig_umask) != 0) { rprintf(FERROR, "mkdir %s failed: %s\n", full_fname(name), strerror(errno)); exit_cleanup(RERR_FILEIO); } else { if (verbose > 0) rprintf(FINFO,"created directory %s\n",name); } if (!push_dir(name)) { rprintf(FERROR, "push_dir %s failed: %s (2)\n", full_fname(name), strerror(errno)); exit_cleanup(RERR_FILESELECT); } return NULL; } static void do_server_sender(int f_in, int f_out, int argc,char *argv[]) { int i; struct file_list *flist; char *dir = argv[0]; if (verbose > 2) { rprintf(FINFO, "server_sender starting pid=%ld\n", (long)getpid()); } if (!relative_paths && !push_dir(dir)) { rprintf(FERROR, "push_dir %s failed: %s (3)\n", full_fname(dir), strerror(errno)); exit_cleanup(RERR_FILESELECT); } argc--; argv++; if (strcmp(dir,".")) { int l = strlen(dir); if (strcmp(dir,"/") == 0) l = 0; for (i=0;icount == 0) { exit_cleanup(0); } io_start_buffering_in(f_in); io_start_buffering_out(f_out); send_files(flist,f_out,f_in); io_flush(FULL_FLUSH); report(f_out); if (protocol_version >= 24) { /* final goodbye message */ read_int(f_in); } 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 status=0; int error_pipe[2]; if (preserve_hard_links) init_hard_links(flist); if (!delete_after) { /* I moved this here from recv_files() to prevent a race condition */ if (recurse && delete_mode && !local_name && flist->count>0) { delete_files(flist); } } if (fd_pair(error_pipe) < 0) { rprintf(FERROR,"error pipe failed in do_recv\n"); exit_cleanup(RERR_SOCKETIO); } io_flush(NORMAL_FLUSH); if ((pid=do_fork()) == 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 */ io_multiplexing_close(); /* set place to send errors */ set_msg_fd_out(error_pipe[1]); recv_files(f_in,flist,local_name); io_flush(FULL_FLUSH); report(f_in); send_msg(MSG_DONE, "", 0); io_flush(FULL_FLUSH); /* 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(error_pipe[1]); if (f_in != f_out) close(f_in); io_start_buffering_out(f_out); set_msg_fd_in(error_pipe[0]); generate_files(f_out, flist, local_name); get_redo_num(); /* Read final MSG_DONE and any prior messages. */ report(-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(pid, &status); return status; } static void do_server_recv(int f_in, int f_out, int argc,char *argv[]) { int status; struct file_list *flist; char *local_name = NULL; char *dir = NULL; if (verbose > 2) { rprintf(FINFO, "server_recv(%d) starting pid=%ld\n", argc, (long)getpid()); } if (am_daemon && lp_read_only(module_id) && !am_sender) { 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)) { rprintf(FERROR, "push_dir %s failed: %s (4)\n", full_fname(dir), strerror(errno)); exit_cleanup(RERR_FILESELECT); } } io_start_buffering_in(f_in); if (delete_mode && !delete_excluded) recv_exclude_list(f_in); if (filesfrom_fd >= 0) { /* We're receiving the file info from the sender, so we need * the IO routines to automatically write out the names onto * our f_out socket as we read the list info from the sender. * This avoids both deadlock and extra delays/buffers. */ io_set_filesfrom_fds(filesfrom_fd, f_out); filesfrom_fd = -1; } if (read_batch) flist = batch_flist; else flist = recv_file_list(f_in); if (!flist) { rprintf(FERROR,"server_recv: recv_file_list error\n"); exit_cleanup(RERR_FILESELECT); } if (argc > 0) { if (strcmp(dir,".")) { argv[0] += strlen(dir); if (argv[0][0] == '/') argv[0]++; } local_name = get_local_name(flist,argv[0]); } status = do_recv(f_in,f_out,flist,local_name); exit_cleanup(status); } 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[]) { setup_protocol(f_out, f_in); set_nonblocking(f_in); set_nonblocking(f_out); if (protocol_version >= 23) io_start_multiplex_out(f_out); if (am_sender) { if (!read_batch) { recv_exclude_list(f_in); if (cvs_exclude) add_cvs_excludes(); } 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 status = 0, status2 = 0; char *local_name = NULL; cleanup_child_pid = pid; if (read_batch) flist = batch_flist; set_nonblocking(f_in); set_nonblocking(f_out); setup_protocol(f_out,f_in); if (protocol_version >= 23) io_start_multiplex_in(f_in); if (am_sender) { io_start_buffering_out(f_out); if (cvs_exclude) add_cvs_excludes(); if (delete_mode && !delete_excluded) send_exclude_list(f_out); if (remote_filesfrom_file) filesfrom_fd = f_in; if (!read_batch) /* don't write to pipe */ flist = send_file_list(f_out,argc,argv); if (verbose > 3) rprintf(FINFO,"file list sent\n"); io_flush(NORMAL_FLUSH); send_files(flist,f_out,f_in); io_flush(FULL_FLUSH); if (protocol_version >= 24) { /* final goodbye message */ read_int(f_in); } if (pid != -1) { if (verbose > 3) rprintf(FINFO,"client_run waiting on %d\n", (int) pid); io_flush(FULL_FLUSH); wait_process(pid, &status); } report(-1); io_flush(FULL_FLUSH); exit_cleanup(status); } if (argc == 0) { list_only = 1; } if (!write_batch) send_exclude_list(f_out); if (filesfrom_fd >= 0) { io_set_filesfrom_fds(filesfrom_fd, f_out); filesfrom_fd = -1; } flist = recv_file_list(f_in); if (!flist || flist->count == 0) { rprintf(FINFO, "client: nothing to do: " "perhaps you need to specify some filenames or " "the --recursive option?\n"); exit_cleanup(0); } local_name = get_local_name(flist,argv[0]); status2 = do_recv(f_in,f_out,flist,local_name); if (pid != -1) { if (verbose > 3) rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid); io_flush(FULL_FLUSH); wait_process(pid, &status); } return MAX(status, status2); } static int copy_argv (char *argv[]) { 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; } /** * 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; /* rsync:// always uses rsync server over direct socket connection */ if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0) { char *host, *path; host = argv[0] + strlen(URL_PREFIX); p = strchr(host,'/'); if (p) { *p = 0; path = p+1; } else { path = ""; } p = strchr(host,':'); if (p) { rsync_port = atoi(p+1); *p = 0; } return start_socket_client(host, path, argc-1, argv+1); } if (!read_batch) { p = find_colon(argv[0]); if (p) { if (remote_filesfrom_file && remote_filesfrom_file != files_from + 1 && strncmp(files_from, argv[0], p-argv[0]+1) != 0) { rprintf(FERROR, "--files-from hostname is not transfer hostname\n"); exit_cleanup(RERR_SYNTAX); } if (p[1] == ':') { /* double colon */ *p = 0; if (!shell_cmd) { return start_socket_client(argv[0], p+2, argc-1, argv+1); } p++; daemon_over_rsh = 1; } if (argc < 1) { usage(FERROR); exit_cleanup(RERR_SYNTAX); } am_sender = 0; *p = 0; shell_machine = argv[0]; shell_path = p+1; argc--; argv++; } else { am_sender = 1; /* rsync:// destination uses rsync server over direct socket */ if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) { char *host, *path; host = argv[argc-1] + strlen(URL_PREFIX); p = strchr(host,'/'); if (p) { *p = 0; path = p+1; } else { path = ""; } p = strchr(host,':'); if (p) { rsync_port = atoi(p+1); *p = 0; } return start_socket_client(host, path, argc-1, argv); } p = find_colon(argv[argc-1]); if (p && remote_filesfrom_file && remote_filesfrom_file != files_from + 1 && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) { rprintf(FERROR, "--files-from hostname is not transfer hostname\n"); exit_cleanup(RERR_SYNTAX); } if (!p) { local_server = 1; if (remote_filesfrom_file) { rprintf(FERROR, "--files-from is remote but transfer is local\n"); exit_cleanup(RERR_SYNTAX); } } else if (p[1] == ':') { /* double colon */ *p = 0; if (!shell_cmd) { return start_socket_client(argv[argc-1], p+2, argc-1, argv); } p++; daemon_over_rsh = 1; } if (argc < 2) { usage(FERROR); exit_cleanup(RERR_SYNTAX); } if (local_server) { shell_machine = NULL; shell_path = argv[argc-1]; } else { *p = 0; shell_machine = argv[argc-1]; shell_path = p+1; } argc--; } } else { am_sender = 1; local_server = 1; shell_path = argv[argc-1]; } 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:""); } if (!am_sender && argc > 1) { usage(FERROR); exit_cleanup(RERR_SYNTAX); } if (argc == 0 && !am_sender) { 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_SIGNAL); } static RETSIGTYPE sigusr2_handler(UNUSED(int val)) { if (log_got_error) _exit(RERR_PARTIAL); _exit(0); } static RETSIGTYPE sigchld_handler(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 } /** * 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 ret; int orig_argc; char **orig_argv; orig_argc = argc; orig_argv = argv; signal(SIGUSR1, sigusr1_handler); signal(SIGUSR2, sigusr2_handler); signal(SIGCHLD, sigchld_handler); #ifdef MAINTAINER_MODE signal(SIGSEGV, rsync_panic_handler); signal(SIGFPE, rsync_panic_handler); signal(SIGABRT, rsync_panic_handler); signal(SIGBUS, rsync_panic_handler); #endif /* def MAINTAINER_MODE */ starttime = time(NULL); am_root = (MY_UID() == 0); memset(&stats, 0, sizeof(stats)); 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 = (int)umask(0); 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); } signal(SIGINT,SIGNAL_CAST sig_int); signal(SIGHUP,SIGNAL_CAST sig_int); signal(SIGTERM,SIGNAL_CAST sig_int); /* Ignore SIGPIPE; we consistently check error codes and will * see the EPIPE. */ signal(SIGPIPE, SIG_IGN); /* 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 && !am_server) { write_batch_argvs_file(orig_argc, orig_argv); } if (am_daemon && !am_server) return daemon_main(); if (argc < 1) { usage(FERROR); exit_cleanup(RERR_SYNTAX); } if (dry_run) verbose = MAX(verbose,1); 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; }