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764782662d8049bf835cad0e643be6ee6ed7280c
android_external_rsync/main.c
Wayne Davison 16edf86595 The improved --xattrs option is landing on the trunk.
2007-04-07 17:22:25 +00:00

1415 lines
36 KiB
C
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/*
* 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) 2003-2007 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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.,
* 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "rsync.h"
#if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
#include <locale.h>
#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 inc_recurse;
extern int blocking_io;
extern int remove_source_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 file_total;
extern int recurse;
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 filesfrom_fd;
extern pid_t cleanup_child_pid;
extern struct stats stats;
extern char *filesfrom_host;
extern char *partial_dir;
extern char *basis_dir[];
extern char *rsync_path;
extern char *shell_cmd;
extern char *batch_name;
extern char *password_file;
extern char curr_dir[MAXPATHLEN];
extern struct filter_list_struct server_filter_list;
int local_server = 0;
int new_root_dir = 0;
mode_t orig_umask = 0;
int batch_gen_fd = -1;
/* 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;
}
/* 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);
}
/* 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 (do_stats && verbose > 1) {
/* 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_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(FCLIENT, "\n");
rprintf(FINFO,"Number 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: %s\n",
human_num(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(FCLIENT, "\n");
rprintf(FINFO,
"sent %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);
}
/**
* 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(FCLIENT, "\n");
rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
getpid(), am_server ? "server " : "",
am_daemon ? "daemon " : "", who_am_i());
rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
(long)mi.arena);
rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
(long)mi.ordblks);
rprintf(FINFO, " smblks: %10ld\n",
(long)mi.smblks);
rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
(long)mi.hblks);
rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
(long)mi.hblkhd);
rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
(long)mi.arena + mi.hblkhd);
rprintf(FINFO, " usmblks: %10ld\n",
(long)mi.usmblks);
rprintf(FINFO, " fsmblks: %10ld\n",
(long)mi.fsmblks);
rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
(long)mi.uordblks);
rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
(long)mi.fordblks);
rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
(long)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[MAX_ARGS];
pid_t ret;
char *dir = NULL;
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 = strdup(cmd);
if (!cmd)
goto oom;
for (t = f = cmd; *f; f++) {
if (*f == ' ')
continue;
/* Comparison leaves rooms for server_options(). */
if (argc >= 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;
if (verbose > 3) {
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];
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.
* 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;
char *cp;
if (verbose > 2) {
rprintf(FINFO, "get_local_name count=%d %s\n",
file_total, NS(dest_path));
}
if (!dest_path || list_only)
return NULL;
/* See what currently exists at the destination. */
if ((statret = do_stat(dest_path, &st)) == 0) {
/* If the destination is a dir, enter it and use mode 1. */
if (S_ISDIR(st.st_mode)) {
if (!push_dir(dest_path, 0)) {
rsyserr(FERROR, errno, "push_dir#1 %s failed",
full_fname(dest_path));
exit_cleanup(RERR_FILESELECT);
}
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);
}
cp = strrchr(dest_path, '/');
/* 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 || (cp && !cp[1])) {
/* Lop off the final slash (if any). */
if (cp && !cp[1])
*cp = '\0';
if (statret == 0) {
rprintf(FERROR,
"ERROR: destination path is not a directory\n");
exit_cleanup(RERR_SYNTAX);
}
if (mkdir_defmode(dest_path) != 0) {
rsyserr(FERROR, errno, "mkdir %s failed",
full_fname(dest_path));
exit_cleanup(RERR_FILEIO);
}
new_root_dir = 1;
if (verbose)
rprintf(FINFO, "created directory %s\n", dest_path);
if (dry_run) {
/* Indicate that dest dir doesn't really exist. */
dry_run++;
}
if (!push_dir(dest_path, dry_run > 1)) {
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, 0)) {
rsyserr(FERROR, errno, "push_dir#3 %s failed",
full_fname(dest_path));
exit_cleanup(RERR_FILESELECT);
}
*cp = '/';
return cp + 1;
}
/* Call this if the destination dir (which is assumed to be in curr_dir)
* does not yet exist and we can't create it due to being in dry-run
* mode. We'll fix dirs that can be relative to the non-existent dir. */
static void fix_basis_dirs(void)
{
char **dir, *new, *slash;
int len;
if (dry_run <= 1)
return;
slash = strrchr(curr_dir, '/');
for (dir = basis_dir; *dir; dir++) {
if (**dir == '/')
continue;
len = curr_dir_len + 1 + strlen(*dir) + 1;
if (!(new = new_array(char, len)))
out_of_memory("fix_basis_dirs");
if (slash && strncmp(*dir, "../", 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, *dir + 3);
*slash = '/';
} else
pathjoin(new, len, curr_dir, *dir);
*dir = new;
}
}
/* This is only called by the sender. */
static void read_final_goodbye(int f_in)
{
int i, iflags, xlen;
uchar fnamecmp_type;
char xname[MAXPATHLEN];
if (protocol_version < 29)
i = read_int(f_in);
else {
i = read_ndx_and_attrs(f_in, &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 = argv[0];
if (verbose > 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_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);
return;
}
if (!relative_paths) {
if (!push_dir(dir, 0)) {
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);
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);
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 = 0;
#ifdef SUPPORT_HARD_LINKS
if (preserve_hard_links)
match_hard_links();
#endif
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 */
io_end_multiplex_out();
/* set place to send errors */
set_msg_fd_out(error_pipe[1]);
io_start_buffering_out(error_pipe[1]);
recv_files(f_in, local_name);
io_flush(FULL_FLUSH);
handle_stats(f_in);
send_msg(MSG_DONE, "", 1);
write_longint(error_pipe[1], stats.total_read);
io_flush(FULL_FLUSH);
/* Handle any keep-alive packets from the post-processing work
* that the generator does. */
if (protocol_version >= 29) {
int iflags, xlen;
uchar fnamecmp_type;
char xname[MAXPATHLEN];
kluge_around_eof = -1;
/* This should only get stopped via a USR2 signal. */
read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
xname, &xlen);
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;
io_end_multiplex_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(f_out);
set_msg_fd_in(error_pipe[0]);
io_start_buffering_in(error_pipe[0]);
generate_files(f_out, local_name);
handle_stats(-1);
io_flush(FULL_FLUSH);
if (protocol_version >= 24) {
/* send a final goodbye message */
write_ndx(f_out, NDX_DONE);
}
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 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, 0)) {
rsyserr(FERROR, errno, "push_dir#4 %s failed",
full_fname(dir));
exit_cleanup(RERR_FILESELECT);
}
}
if (protocol_version >= 30)
io_start_multiplex_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. */
io_set_filesfrom_fds(filesfrom_fd, f_out);
filesfrom_fd = -1;
}
flist = recv_file_list(f_in);
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);
verbose = save_verbose;
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;
for (dir = basis_dir; *dir; dir++) {
*dir = sanitize_path(NULL, *dir, NULL, curr_dir_depth, NULL);
}
if (partial_dir) {
partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, NULL);
}
}
fix_basis_dirs();
if (server_filter_list.head) {
char **dir;
struct filter_list_struct *elp = &server_filter_list;
for (dir = basis_dir; *dir; dir++) {
if (check_filter(elp, *dir, 1) < 0)
goto options_rejected;
}
if (partial_dir && *partial_dir == '/'
&& check_filter(elp, partial_dir, 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 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);
}
/*
* 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
/* 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 (protocol_version >= 30)
io_start_multiplex_out();
else
io_start_buffering_out(f_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");
if (protocol_version >= 23)
io_start_multiplex_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);
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 (!read_batch) {
if (protocol_version >= 23)
io_start_multiplex_in();
if (need_messages_from_generator)
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);
if (inc_recurse && file_total == 1)
recv_additional_file_list(f_in);
if (flist && flist->count > 0) {
local_name = get_local_name(flist, argv[0]);
fix_basis_dirs();
exit_code2 = do_recv(f_in, f_out, 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[])
{
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;
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 (password_file && !daemon_over_rsh) {
rprintf(FERROR, "The --password-file option may only be "
"used when accessing 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 (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;
snprintf(cmd_buf, sizeof 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 = 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));
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
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, 0);
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);
else
write_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;
}
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