*
* Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
* Copyright (C) 2001-2002 Martin Pool <mbp@samba.org>
- * Copyright (C) 2002-2009 Wayne Davison
+ * Copyright (C) 2002-2021 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
#include "rsync.h"
#include "itypes.h"
+#include "ifuncs.h"
extern int quiet;
extern int dry_run;
extern int am_server;
extern int am_daemon;
extern int am_root;
+extern int msgs2stderr;
extern int rsync_port;
extern int protect_args;
extern int ignore_errors;
extern int preserve_xattrs;
extern int kluge_around_eof;
-extern int daemon_over_rsh;
extern int munge_symlinks;
+extern int open_noatime;
extern int sanitize_paths;
extern int numeric_ids;
extern int filesfrom_fd;
extern int default_af_hint;
extern int logfile_format_has_i;
extern int logfile_format_has_o_or_i;
-extern mode_t orig_umask;
extern char *bind_address;
extern char *config_file;
extern char *logfile_format;
extern char *files_from;
extern char *tmpdir;
+extern char *early_input_file;
extern struct chmod_mode_struct *chmod_modes;
-extern struct filter_list_struct daemon_filter_list;
-extern char curr_dir[MAXPATHLEN];
+extern filter_rule_list daemon_filter_list;
#ifdef ICONV_OPTION
extern char *iconv_opt;
extern iconv_t ic_send, ic_recv;
#endif
+extern uid_t our_uid;
+extern gid_t our_gid;
char *auth_user;
int read_only = 0;
int module_id = -1;
+int pid_file_fd = -1;
+int early_input_len = 0;
+char *early_input = NULL;
+pid_t namecvt_pid = 0;
struct chmod_mode_struct *daemon_chmod_modes;
+#define EARLY_INPUT_CMD "#early_input="
+#define EARLY_INPUT_CMDLEN (sizeof EARLY_INPUT_CMD - 1)
+
/* module_dirlen is the length of the module_dir string when in daemon
* mode and module_dir is not "/"; otherwise 0. (Note that a chroot-
* enabled module can have a non-"/" module_dir these days.) */
char *full_module_path;
static int rl_nulls = 0;
+static int namecvt_fd_req = -1, namecvt_fd_ans = -1;
#ifdef HAVE_SIGACTION
static struct sigaction sigact;
#endif
+static item_list gid_list = EMPTY_ITEM_LIST;
+
/* Used when "reverse lookup" is off. */
const char undetermined_hostname[] = "UNDETERMINED";
*p = '\0';
}
- fd = open_socket_out_wrapped(host, rsync_port, bind_address,
- default_af_hint);
+ fd = open_socket_out_wrapped(host, rsync_port, bind_address, default_af_hint);
if (fd == -1)
exit_cleanup(RERR_SOCKETIO);
#else
int our_sub = 0;
#endif
- char *motd;
io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub);
-
if (!am_client) {
- motd = lp_motd_file();
+ char *motd = lp_motd_file();
if (motd && *motd) {
- FILE *f = fopen(motd,"r");
+ FILE *f = fopen(motd, "r");
while (f && !feof(f)) {
int len = fread(buf, 1, bufsiz - 1, f);
if (len > 0)
}
/* This strips the \n. */
- if (!read_line_old(f_in, buf, bufsiz)) {
+ if (!read_line_old(f_in, buf, bufsiz, 0)) {
if (am_client)
rprintf(FERROR, "rsync: did not see server greeting\n");
return -1;
else
modlen = p - *argv;
- if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */
- out_of_memory("start_inband_exchange");
+ modname = new_array(char, modlen+1+1); /* room for '/' & '\0' */
strlcpy(modname, *argv, modlen + 1);
modname[modlen] = '/';
modname[modlen+1] = '\0';
if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0)
return -1;
- /* set daemon_over_rsh to false since we need to build the
- * true set of args passed through the rsh/ssh connection;
- * this is a no-op for direct-socket-connection mode */
- daemon_over_rsh = 0;
+ if (early_input_file) {
+ STRUCT_STAT st;
+ FILE *f = fopen(early_input_file, "rb");
+ if (!f || do_fstat(fileno(f), &st) < 0) {
+ rsyserr(FERROR, errno, "failed to open %s", early_input_file);
+ return -1;
+ }
+ early_input_len = st.st_size;
+ if (early_input_len > (int)sizeof line) {
+ rprintf(FERROR, "%s is > %d bytes.\n", early_input_file, (int)sizeof line);
+ return -1;
+ }
+ if (early_input_len > 0) {
+ io_printf(f_out, EARLY_INPUT_CMD "%d\n", early_input_len);
+ while (early_input_len > 0) {
+ int len;
+ if (feof(f)) {
+ rprintf(FERROR, "Early EOF in %s\n", early_input_file);
+ return -1;
+ }
+ len = fread(line, 1, early_input_len, f);
+ if (len > 0) {
+ write_buf(f_out, line, len);
+ early_input_len -= len;
+ }
+ }
+ }
+ fclose(f);
+ }
+
server_options(sargs, &sargc);
if (sargc >= MAX_ARGS - 2)
if (strncmp(*argv, modname, modlen) == 0
&& argv[0][modlen] == '\0')
sargs[sargc++] = modname; /* we send "modname/" */
- else
+ else if (**argv == '-') {
+ if (asprintf(sargs + sargc++, "./%s", *argv) < 0)
+ out_of_memory("start_inband_exchange");
+ } else
sargs[sargc++] = *argv;
argv++;
argc--;
kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0;
while (1) {
- if (!read_line_old(f_in, line, sizeof line)) {
+ if (!read_line_old(f_in, line, sizeof line, 0)) {
rprintf(FERROR, "rsync: didn't get server startup line\n");
return -1;
}
if (protocol_version < 23) {
if (protocol_version == 22 || !am_sender)
- io_start_multiplex_in();
+ io_start_multiplex_in(f_in);
}
free(modname);
return 0;
}
-static char *finish_pre_exec(pid_t pid, int fd, char *request,
- char **early_argv, char **argv)
+#if defined HAVE_SETENV || defined HAVE_PUTENV
+static int read_arg_from_pipe(int fd, char *buf, int limit)
+{
+ char *bp = buf, *eob = buf + limit - 1;
+
+ while (1) {
+ int got = read(fd, bp, 1);
+ if (got != 1) {
+ if (got < 0 && errno == EINTR)
+ continue;
+ return -1;
+ }
+ if (*bp == '\0')
+ break;
+ if (bp < eob)
+ bp++;
+ }
+ *bp = '\0';
+
+ return bp - buf;
+}
+#endif
+
+static void set_env_str(const char *var, const char *str)
+{
+#ifdef HAVE_SETENV
+ if (setenv(var, str, 1) < 0)
+ out_of_memory("set_env_str");
+#else
+#ifdef HAVE_PUTENV
+ char *mem;
+ if (asprintf(&mem, "%s=%s", var, str) < 0)
+ out_of_memory("set_env_str");
+ putenv(mem);
+#else
+ (void)var;
+ (void)str;
+#endif
+#endif
+}
+
+#if defined HAVE_SETENV || defined HAVE_PUTENV
+
+static void set_envN_str(const char *var, int num, const char *str)
+{
+#ifdef HAVE_SETENV
+ char buf[128];
+ (void)snprintf(buf, sizeof buf, "%s%d", var, num);
+ if (setenv(buf, str, 1) < 0)
+ out_of_memory("set_env_str");
+#else
+#ifdef HAVE_PUTENV
+ char *mem;
+ if (asprintf(&mem, "%s%d=%s", var, num, str) < 0)
+ out_of_memory("set_envN_str");
+ putenv(mem);
+#endif
+#endif
+}
+
+void set_env_num(const char *var, long num)
+{
+#ifdef HAVE_SETENV
+ char val[64];
+ (void)snprintf(val, sizeof val, "%ld", num);
+ if (setenv(var, val, 1) < 0)
+ out_of_memory("set_env_str");
+#else
+#ifdef HAVE_PUTENV
+ char *mem;
+ if (asprintf(&mem, "%s=%ld", var, num) < 0)
+ out_of_memory("set_env_num");
+ putenv(mem);
+#endif
+#endif
+}
+
+/* Used for "early exec", "pre-xfer exec", and the "name converter" script. */
+static pid_t start_pre_exec(const char *cmd, int *arg_fd_ptr, int *error_fd_ptr)
{
- int j = 0, status = -1;
+ int arg_fds[2], error_fds[2], arg_fd;
+ pid_t pid;
+
+ if ((error_fd_ptr && pipe(error_fds) < 0) || pipe(arg_fds) < 0 || (pid = fork()) < 0)
+ return (pid_t)-1;
+
+ if (pid == 0) {
+ char buf[BIGPATHBUFLEN];
+ int j, len, status;
+
+ if (error_fd_ptr) {
+ close(error_fds[0]);
+ set_blocking(error_fds[1]);
+ }
+
+ close(arg_fds[1]);
+ arg_fd = arg_fds[0];
+ set_blocking(arg_fd);
+
+ len = read_arg_from_pipe(arg_fd, buf, BIGPATHBUFLEN);
+ if (len <= 0)
+ _exit(1);
+ set_env_str("RSYNC_REQUEST", buf);
+
+ for (j = 0; ; j++) {
+ len = read_arg_from_pipe(arg_fd, buf, BIGPATHBUFLEN);
+ if (len <= 0) {
+ if (!len)
+ break;
+ _exit(1);
+ }
+ set_envN_str("RSYNC_ARG", j, buf);
+ }
+
+ dup2(arg_fd, STDIN_FILENO);
+ close(arg_fd);
+
+ if (error_fd_ptr) {
+ dup2(error_fds[1], STDOUT_FILENO);
+ close(error_fds[1]);
+ }
+
+ status = shell_exec(cmd);
+
+ if (!WIFEXITED(status))
+ _exit(1);
+ _exit(WEXITSTATUS(status));
+ }
+
+ if (error_fd_ptr) {
+ close(error_fds[1]);
+ *error_fd_ptr = error_fds[0];
+ set_blocking(error_fds[0]);
+ }
+
+ close(arg_fds[0]);
+ arg_fd = *arg_fd_ptr = arg_fds[1];
+ set_blocking(arg_fd);
+
+ return pid;
+}
+
+#endif
+
+static void write_pre_exec_args(int write_fd, char *request, char **early_argv, char **argv, int exec_type)
+{
+ int j = 0;
if (!request)
request = "(NONE)";
- write_buf(fd, request, strlen(request)+1);
+ write_buf(write_fd, request, strlen(request)+1);
if (early_argv) {
for ( ; *early_argv; early_argv++)
- write_buf(fd, *early_argv, strlen(*early_argv)+1);
+ write_buf(write_fd, *early_argv, strlen(*early_argv)+1);
j = 1; /* Skip arg0 name in argv. */
}
- for ( ; argv[j]; j++) {
- write_buf(fd, argv[j], strlen(argv[j])+1);
- if (argv[j][0] == '.' && argv[j][1] == '\0')
- break;
+ if (argv) {
+ for ( ; argv[j]; j++)
+ write_buf(write_fd, argv[j], strlen(argv[j])+1);
}
- write_byte(fd, 0);
+ write_byte(write_fd, 0);
+
+ if (exec_type == 1 && early_input_len)
+ write_buf(write_fd, early_input, early_input_len);
- close(fd);
+ if (exec_type != 2) /* the name converter needs this left open */
+ close(write_fd);
+}
+
+static char *finish_pre_exec(const char *desc, pid_t pid, int read_fd)
+{
+ char buf[BIGPATHBUFLEN], *bp, *cr;
+ int j, status = -1, msglen = sizeof buf - 1;
+
+ if (read_fd >= 0) {
+ /* Read the stdout from the program. This it is only displayed
+ * to the user if the script also returns an error status. */
+ for (bp = buf, cr = buf; msglen > 0; msglen -= j) {
+ if ((j = read(read_fd, bp, msglen)) <= 0) {
+ if (j == 0)
+ break;
+ if (errno == EINTR)
+ continue;
+ break; /* Just ignore the read error for now... */
+ }
+ bp[j] = '\0';
+ while (1) {
+ if ((cr = strchr(cr, '\r')) == NULL) {
+ cr = bp + j;
+ break;
+ }
+ if (!cr[1])
+ break; /* wait for more data before we decide what to do */
+ if (cr[1] == '\n') {
+ memmove(cr, cr+1, j - (cr - bp));
+ j--;
+ } else
+ cr++;
+ }
+ bp += j;
+ }
+ *bp = '\0';
+
+ close(read_fd);
+ } else
+ *buf = '\0';
if (wait_process(pid, &status, 0) < 0
|| !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
char *e;
- if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n",
- status, status < 0 ? ": " : "",
- status < 0 ? strerror(errno) : "") < 0)
- out_of_memory("finish_pre_exec");
+ if (asprintf(&e, "%s returned failure (%d)%s%s%s\n%s",
+ desc, status, status < 0 ? ": " : "",
+ status < 0 ? strerror(errno) : "",
+ *buf ? ":" : "", buf) < 0)
+ return "out_of_memory in finish_pre_exec\n";
return e;
}
return NULL;
}
-static int read_arg_from_pipe(int fd, char *buf, int limit)
-{
- char *bp = buf, *eob = buf + limit - 1;
-
- while (1) {
- int got = read(fd, bp, 1);
- if (got != 1) {
- if (got < 0 && errno == EINTR)
- continue;
- return -1;
- }
- if (*bp == '\0')
- break;
- if (bp < eob)
- bp++;
- }
- *bp = '\0';
-
- return bp - buf;
-}
-
static int path_failure(int f_out, const char *dir, BOOL was_chdir)
{
if (was_chdir)
- rsyserr(FLOG, errno, "chdir %s failed\n", dir);
+ rsyserr(FLOG, errno, "chdir %s failed", dir);
else
rprintf(FLOG, "normalize_path(%s) failed\n", dir);
io_printf(f_out, "@ERROR: chdir failed\n");
return -1;
}
+static int add_a_group(int f_out, const char *gname)
+{
+ gid_t gid, *gid_p;
+ if (!group_to_gid(gname, &gid, True)) {
+ rprintf(FLOG, "Invalid gid %s\n", gname);
+ io_printf(f_out, "@ERROR: invalid gid %s\n", gname);
+ return -1;
+ }
+ gid_p = EXPAND_ITEM_LIST(&gid_list, gid_t, -32);
+ *gid_p = gid;
+ return 0;
+}
+
+#ifdef HAVE_GETGROUPLIST
+static int want_all_groups(int f_out, uid_t uid)
+{
+ const char *err;
+ if ((err = getallgroups(uid, &gid_list)) != NULL) {
+ rsyserr(FLOG, errno, "%s", err);
+ io_printf(f_out, "@ERROR: %s\n", err);
+ return -1;
+ }
+ return 0;
+}
+#elif defined HAVE_INITGROUPS
+static struct passwd *want_all_groups(int f_out, uid_t uid)
+{
+ struct passwd *pw;
+ gid_t *gid_p;
+ if ((pw = getpwuid(uid)) == NULL) {
+ rsyserr(FLOG, errno, "getpwuid failed");
+ io_printf(f_out, "@ERROR: getpwuid failed\n");
+ return NULL;
+ }
+ /* Start with the default group and initgroups() will add the rest. */
+ gid_p = EXPAND_ITEM_LIST(&gid_list, gid_t, -32);
+ *gid_p = pw->pw_gid;
+ return pw;
+}
+#endif
+
static int rsync_module(int f_in, int f_out, int i, const char *addr, const char *host)
{
int argc;
char **argv, **orig_argv, **orig_early_argv, *module_chdir;
char line[BIGPATHBUFLEN];
- uid_t uid = (uid_t)-2; /* canonically "nobody" */
- gid_t gid = (gid_t)-2;
+#if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST
+ struct passwd *pw = NULL;
+#endif
+ uid_t uid;
+ int set_uid;
char *p, *err_msg = NULL;
char *name = lp_name(i);
int use_chroot = lp_use_chroot(i);
- int ret, pre_exec_fd = -1;
+ int ret, pre_exec_arg_fd = -1, pre_exec_error_fd = -1;
int save_munge_symlinks;
pid_t pre_exec_pid = 0;
char *request = NULL;
+ set_env_str("RSYNC_MODULE_NAME", name);
+
#ifdef ICONV_OPTION
iconv_opt = lp_charset(i);
if (*iconv_opt)
/* If reverse lookup is disabled globally but enabled for this module,
* we need to do it now before the access check. */
if (host == undetermined_hostname && lp_reverse_lookup(i))
- host = client_name(f_in);
+ host = client_name(client_addr(f_in));
+ set_env_str("RSYNC_HOST_NAME", host);
+ set_env_str("RSYNC_HOST_ADDR", addr);
- if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
+ if (!allow_access(addr, &host, i)) {
rprintf(FLOG, "rsync denied on module %s from %s (%s)\n",
name, host, addr);
if (!lp_list(i))
return -1;
}
- if (am_daemon && am_server) {
+ if (am_daemon > 0) {
rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n",
name, host, addr);
}
return -1;
}
+ read_only = lp_read_only(i); /* may also be overridden by auth_server() */
auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD ");
if (!auth_user) {
io_printf(f_out, "@ERROR: auth failed on module %s\n", name);
return -1;
}
+ set_env_str("RSYNC_USER_NAME", auth_user);
module_id = i;
- if (lp_read_only(i))
- read_only = 1;
-
- if (lp_transfer_logging(i) && !logfile_format)
- logfile_format = lp_log_format(i);
+ if (lp_transfer_logging(module_id) && !logfile_format)
+ logfile_format = lp_log_format(module_id);
if (log_format_has(logfile_format, 'i'))
logfile_format_has_i = 1;
if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
logfile_format_has_o_or_i = 1;
- am_root = (MY_UID() == 0);
+ uid = MY_UID();
+ am_root = (uid == ROOT_UID);
- if (am_root) {
- p = lp_uid(i);
- if (!name_to_uid(p, &uid)) {
- if (!isDigit(p)) {
- rprintf(FLOG, "Invalid uid %s\n", p);
- io_printf(f_out, "@ERROR: invalid uid %s\n", p);
- return -1;
- }
- uid = atoi(p);
+ p = *lp_uid(module_id) ? lp_uid(module_id) : am_root ? NOBODY_USER : NULL;
+ if (p) {
+ if (!user_to_uid(p, &uid, True)) {
+ rprintf(FLOG, "Invalid uid %s\n", p);
+ io_printf(f_out, "@ERROR: invalid uid %s\n", p);
+ return -1;
}
-
- p = lp_gid(i);
- if (!name_to_gid(p, &gid)) {
- if (!isDigit(p)) {
- rprintf(FLOG, "Invalid gid %s\n", p);
- io_printf(f_out, "@ERROR: invalid gid %s\n", p);
+ set_uid = 1;
+ } else
+ set_uid = 0;
+
+ p = *lp_gid(module_id) ? conf_strtok(lp_gid(module_id)) : NULL;
+ if (p) {
+ /* The "*" gid must be the first item in the list. */
+ if (strcmp(p, "*") == 0) {
+#ifdef HAVE_GETGROUPLIST
+ if (want_all_groups(f_out, uid) < 0)
+ return -1;
+#elif defined HAVE_INITGROUPS
+ if ((pw = want_all_groups(f_out, uid)) == NULL)
+ return -1;
+#else
+ rprintf(FLOG, "This rsync does not support a gid of \"*\"\n");
+ io_printf(f_out, "@ERROR: invalid gid setting.\n");
+ return -1;
+#endif
+ } else if (add_a_group(f_out, p) < 0)
+ return -1;
+ while ((p = conf_strtok(NULL)) != NULL) {
+#if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST
+ if (pw) {
+ rprintf(FLOG, "This rsync cannot add groups after \"*\".\n");
+ io_printf(f_out, "@ERROR: invalid gid setting.\n");
return -1;
}
- gid = atoi(p);
+#endif
+ if (add_a_group(f_out, p) < 0)
+ return -1;
}
+ } else if (am_root) {
+ if (add_a_group(f_out, NOBODY_GROUP) < 0)
+ return -1;
}
- /* TODO: If we're not root, but the configuration requests
- * that we change to some uid other than the current one, then
- * log a warning. */
-
- /* TODO: Perhaps take a list of gids, and make them into the
- * supplementary groups. */
-
- module_dir = lp_path(i);
+ module_dir = lp_path(module_id);
+ if (*module_dir == '\0') {
+ rprintf(FLOG, "No path specified for module %s\n", name);
+ io_printf(f_out, "@ERROR: no path setting.\n");
+ return -1;
+ }
if (use_chroot) {
if ((p = strstr(module_dir, "/./")) != NULL) {
*p = '\0'; /* Temporary... */
return path_failure(f_out, module_dir, False);
full_module_path = module_dir = module_chdir;
}
+ set_env_str("RSYNC_MODULE_PATH", full_module_path);
if (module_dirlen == 1) {
module_dirlen = 0;
} else
set_filter_dir(module_dir, module_dirlen);
- p = lp_filter(i);
- parse_rule(&daemon_filter_list, p, MATCHFLG_WORD_SPLIT,
- XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3);
+ p = lp_filter(module_id);
+ parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT),
+ XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3);
- p = lp_include_from(i);
- parse_filter_file(&daemon_filter_list, p, MATCHFLG_INCLUDE,
- XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
+ p = lp_include_from(module_id);
+ parse_filter_file(&daemon_filter_list, p, rule_template(FILTRULE_INCLUDE),
+ XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
- p = lp_include(i);
- parse_rule(&daemon_filter_list, p,
- MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT,
- XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES);
+ p = lp_include(module_id);
+ parse_filter_str(&daemon_filter_list, p,
+ rule_template(FILTRULE_INCLUDE | FILTRULE_WORD_SPLIT),
+ XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES);
- p = lp_exclude_from(i);
- parse_filter_file(&daemon_filter_list, p, 0,
- XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
+ p = lp_exclude_from(module_id);
+ parse_filter_file(&daemon_filter_list, p, rule_template(0),
+ XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
- p = lp_exclude(i);
- parse_rule(&daemon_filter_list, p, MATCHFLG_WORD_SPLIT,
- XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES);
+ p = lp_exclude(module_id);
+ parse_filter_str(&daemon_filter_list, p, rule_template(FILTRULE_WORD_SPLIT),
+ XFLG_ABS_IF_SLASH | XFLG_DIR2WILD3 | XFLG_OLD_PREFIXES);
log_init(1);
-#ifdef HAVE_PUTENV
- if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) {
- char *modname, *modpath, *hostaddr, *hostname, *username;
- int status;
-
- if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0
- || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", full_module_path) < 0
- || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0
- || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0
- || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0)
- out_of_memory("rsync_module");
- putenv(modname);
- putenv(modpath);
- putenv(hostaddr);
- putenv(hostname);
- putenv(username);
- umask(orig_umask);
+#if defined HAVE_SETENV || defined HAVE_PUTENV
+ if ((*lp_early_exec(module_id) || *lp_prexfer_exec(module_id)
+ || *lp_postxfer_exec(module_id) || *lp_name_converter(module_id))
+ && !getenv("RSYNC_NO_XFER_EXEC")) {
+ set_env_num("RSYNC_PID", (long)getpid());
+
/* For post-xfer exec, fork a new process to run the rsync
* daemon while this process waits for the exit status and
* runs the indicated command at that point. */
- if (*lp_postxfer_exec(i)) {
+ if (*lp_postxfer_exec(module_id)) {
pid_t pid = fork();
if (pid < 0) {
rsyserr(FLOG, errno, "fork failed");
return -1;
}
if (pid) {
- if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0)
- putenv(p);
+ int status;
+ close(f_in);
+ if (f_out != f_in)
+ close(f_out);
if (wait_process(pid, &status, 0) < 0)
status = -1;
- if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0)
- putenv(p);
+ set_env_num("RSYNC_RAW_STATUS", status);
if (WIFEXITED(status))
status = WEXITSTATUS(status);
else
status = -1;
- if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0)
- putenv(p);
- if (system(lp_postxfer_exec(i)) < 0)
+ set_env_num("RSYNC_EXIT_STATUS", status);
+ if (shell_exec(lp_postxfer_exec(module_id)) < 0)
status = -1;
_exit(status);
}
}
+
+ /* For early exec, fork a child process to run the indicated
+ * command and wait for it to exit. */
+ if (*lp_early_exec(module_id)) {
+ int arg_fd;
+ pid_t pid = start_pre_exec(lp_early_exec(module_id), &arg_fd, NULL);
+ if (pid == (pid_t)-1) {
+ rsyserr(FLOG, errno, "early exec preparation failed");
+ io_printf(f_out, "@ERROR: early exec preparation failed\n");
+ return -1;
+ }
+ write_pre_exec_args(arg_fd, NULL, NULL, NULL, 1);
+ if (finish_pre_exec("early exec", pid, -1) != NULL) {
+ rsyserr(FLOG, errno, "early exec failed");
+ io_printf(f_out, "@ERROR: early exec failed\n");
+ return -1;
+ }
+ }
+
/* For pre-xfer exec, fork a child process to run the indicated
* command, though it first waits for the parent process to
* send us the user's request via a pipe. */
- if (*lp_prexfer_exec(i)) {
- int fds[2];
- if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0)
- putenv(p);
- if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) {
+ if (*lp_prexfer_exec(module_id)) {
+ pre_exec_pid = start_pre_exec(lp_prexfer_exec(module_id), &pre_exec_arg_fd, &pre_exec_error_fd);
+ if (pre_exec_pid == (pid_t)-1) {
rsyserr(FLOG, errno, "pre-xfer exec preparation failed");
io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n");
return -1;
}
- if (pre_exec_pid == 0) {
- char buf[BIGPATHBUFLEN];
- int j, len;
- close(fds[1]);
- set_blocking(fds[0]);
- len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN);
- if (len <= 0)
- _exit(1);
- if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0)
- putenv(p);
- for (j = 0; ; j++) {
- len = read_arg_from_pipe(fds[0], buf,
- BIGPATHBUFLEN);
- if (len <= 0) {
- if (!len)
- break;
- _exit(1);
- }
- if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0)
- putenv(p);
- }
- close(fds[0]);
- close(STDIN_FILENO);
- close(STDOUT_FILENO);
- status = system(lp_prexfer_exec(i));
- if (!WIFEXITED(status))
- _exit(1);
- _exit(WEXITSTATUS(status));
+ }
+
+ if (*lp_name_converter(module_id)) {
+ namecvt_pid = start_pre_exec(lp_name_converter(module_id), &namecvt_fd_req, &namecvt_fd_ans);
+ if (namecvt_pid == (pid_t)-1) {
+ rsyserr(FLOG, errno, "name-converter exec preparation failed");
+ io_printf(f_out, "@ERROR: name-converter exec preparation failed\n");
+ return -1;
}
- close(fds[0]);
- set_blocking(fds[1]);
- pre_exec_fd = fds[1];
}
- umask(0);
}
#endif
+ if (early_input) {
+ free(early_input);
+ early_input = NULL;
+ }
+
if (use_chroot) {
/*
* XXX: The 'use chroot' flag is a fairly reliable
if (!change_dir(module_chdir, CD_NORMAL))
return path_failure(f_out, module_chdir, True);
- if (module_dirlen || !use_chroot)
+ if (module_dirlen || (!use_chroot && !*lp_daemon_chroot()))
sanitize_paths = 1;
- if ((munge_symlinks = lp_munge_symlinks(i)) < 0)
+ if ((munge_symlinks = lp_munge_symlinks(module_id)) < 0)
munge_symlinks = !use_chroot || module_dirlen;
if (munge_symlinks) {
STRUCT_STAT st;
}
}
- if (am_root) {
- /* XXXX: You could argue that if the daemon is started
- * by a non-root user and they explicitly specify a
- * gid, then we should try to change to that gid --
- * this could be possible if it's already in their
- * supplementary groups. */
-
- /* TODO: Perhaps we need to document that if rsyncd is
- * started by somebody other than root it will inherit
- * all their supplementary groups. */
-
- if (setgid(gid)) {
- rsyserr(FLOG, errno, "setgid %d failed", (int)gid);
+ if (gid_list.count) {
+ gid_t *gid_array = gid_list.items;
+ if (setgid(gid_array[0])) {
+ rsyserr(FLOG, errno, "setgid %ld failed", (long)gid_array[0]);
io_printf(f_out, "@ERROR: setgid failed\n");
return -1;
}
#ifdef HAVE_SETGROUPS
- /* Get rid of any supplementary groups this process
- * might have inheristed. */
- if (setgroups(1, &gid)) {
+ /* Set the group(s) we want to be active. */
+ if (setgroups(gid_list.count, gid_array)) {
rsyserr(FLOG, errno, "setgroups failed");
io_printf(f_out, "@ERROR: setgroups failed\n");
return -1;
}
#endif
+#if defined HAVE_INITGROUPS && !defined HAVE_GETGROUPLIST
+ /* pw is set if the user wants all the user's groups. */
+ if (pw && initgroups(pw->pw_name, pw->pw_gid) < 0) {
+ rsyserr(FLOG, errno, "initgroups failed");
+ io_printf(f_out, "@ERROR: initgroups failed\n");
+ return -1;
+ }
+#endif
+ our_gid = MY_GID();
+ }
- if (setuid(uid)) {
- rsyserr(FLOG, errno, "setuid %d failed", (int)uid);
+ if (set_uid) {
+ if (setuid(uid) < 0
+#ifdef HAVE_SETEUID
+ || seteuid(uid) < 0
+#endif
+ ) {
+ rsyserr(FLOG, errno, "setuid %ld failed", (long)uid);
io_printf(f_out, "@ERROR: setuid failed\n");
return -1;
}
- am_root = (MY_UID() == 0);
+ our_uid = MY_UID();
+ am_root = (our_uid == ROOT_UID);
}
- if (lp_temp_dir(i) && *lp_temp_dir(i)) {
- tmpdir = lp_temp_dir(i);
+ if (lp_temp_dir(module_id) && *lp_temp_dir(module_id)) {
+ tmpdir = lp_temp_dir(module_id);
if (strlen(tmpdir) >= MAXPATHLEN - 10) {
rprintf(FLOG,
"the 'temp dir' value for %s is WAY too long -- ignoring.\n",
} else
orig_early_argv = NULL;
+ /* The default is to use the user's setting unless the module sets True or False. */
+ if (lp_open_noatime(module_id) >= 0)
+ open_noatime = lp_open_noatime(module_id);
+
munge_symlinks = save_munge_symlinks; /* The client mustn't control this. */
+ if (am_daemon > 0)
+ msgs2stderr = 0; /* A non-rsh-run daemon doesn't have stderr for msgs. */
+
if (pre_exec_pid) {
- err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request,
- orig_early_argv, orig_argv);
+ write_pre_exec_args(pre_exec_arg_fd, request, orig_early_argv, orig_argv, 0);
+ err_msg = finish_pre_exec("pre-xfer exec", pre_exec_pid, pre_exec_error_fd);
}
+ if (namecvt_pid)
+ write_pre_exec_args(namecvt_fd_req, request, orig_early_argv, orig_argv, 2);
+
if (orig_early_argv)
free(orig_early_argv);
if (write_batch < 0)
dry_run = 1;
- if (lp_fake_super(i)) {
+ if (lp_fake_super(module_id)) {
if (preserve_xattrs > 1)
preserve_xattrs = 1;
am_root = -1;
#ifndef DEBUG
/* don't allow the logs to be flooded too fast */
- limit_output_verbosity(lp_max_verbosity(i));
+ limit_output_verbosity(lp_max_verbosity(module_id));
#endif
- if (protocol_version < 23
- && (protocol_version == 22 || am_sender))
- io_start_multiplex_out();
+ if (protocol_version < 23 && (protocol_version == 22 || am_sender))
+ io_start_multiplex_out(f_out);
else if (!ret || err_msg) {
/* We have to get I/O multiplexing started so that we can
* get the error back to the client. This means getting
if (files_from)
write_byte(f_out, 0);
}
- io_start_multiplex_out();
+ io_start_multiplex_out(f_out);
}
if (!ret || err_msg) {
- if (err_msg)
- rwrite(FERROR, err_msg, strlen(err_msg), 0);
- else
+ if (err_msg) {
+ while ((p = strchr(err_msg, '\n')) != NULL) {
+ int len = p - err_msg + 1;
+ rwrite(FERROR, err_msg, len, 0);
+ err_msg += len;
+ }
+ if (*err_msg)
+ rprintf(FERROR, "%s\n", err_msg);
+ io_flush(MSG_FLUSH);
+ } else
option_error();
msleep(400);
exit_cleanup(RERR_UNSUPPORTED);
#endif
if (!numeric_ids
- && (use_chroot ? lp_numeric_ids(i) != False : lp_numeric_ids(i) == True))
+ && (use_chroot ? lp_numeric_ids(module_id) != False && !*lp_name_converter(module_id)
+ : lp_numeric_ids(module_id) == True))
numeric_ids = -1; /* Set --numeric-ids w/o breaking protocol. */
- if (lp_timeout(i) && lp_timeout(i) > io_timeout)
- set_io_timeout(lp_timeout(i));
+ if (lp_timeout(module_id) && (!io_timeout || lp_timeout(module_id) < io_timeout))
+ set_io_timeout(lp_timeout(module_id));
/* If we have some incoming/outgoing chmod changes, append them to
* any user-specified changes (making our changes have priority).
* We also get a pointer to just our changes so that a receiver
* process can use them separately if --perms wasn't specified. */
if (am_sender)
- p = lp_outgoing_chmod(i);
+ p = lp_outgoing_chmod(module_id);
else
- p = lp_incoming_chmod(i);
+ p = lp_incoming_chmod(module_id);
if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) {
rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n",
am_sender ? "outgo" : "incom", p);
return 0;
}
+BOOL namecvt_call(const char *cmd, const char **name_p, id_t *id_p)
+{
+ char buf[1024];
+ int got, len;
+
+ if (*name_p)
+ len = snprintf(buf, sizeof buf, "%s %s\n", cmd, *name_p);
+ else
+ len = snprintf(buf, sizeof buf, "%s %ld\n", cmd, (long)*id_p);
+ if (len >= (int)sizeof buf) {
+ rprintf(FERROR, "namecvt_call() request was too large.\n");
+ exit_cleanup(RERR_UNSUPPORTED);
+ }
+
+ while ((got = write(namecvt_fd_req, buf, len)) != len) {
+ if (got < 0 && errno == EINTR)
+ continue;
+ rprintf(FERROR, "Connection to name-converter failed.\n");
+ exit_cleanup(RERR_SOCKETIO);
+ }
+
+ if (!read_line_old(namecvt_fd_ans, buf, sizeof buf, 0))
+ return False;
+
+ if (*name_p)
+ *id_p = (id_t)atol(buf);
+ else
+ *name_p = strdup(buf);
+
+ return True;
+}
+
/* send a list of available modules to the client. Don't list those
with "list = False". */
static void send_listing(int fd)
static int load_config(int globals_only)
{
if (!config_file) {
- if (am_server && am_root <= 0)
+ if (am_daemon < 0 && am_root <= 0)
config_file = RSYNCD_USERCONF;
else
config_file = RSYNCD_SYSCONF;
{
char line[1024];
const char *addr, *host;
+ char *p;
int i;
+ /* At this point, am_server is only set for a daemon started via rsh.
+ * Because am_server gets forced on soon, we'll set am_daemon to -1 as
+ * a flag that can be checked later on to distinguish a normal daemon
+ * from an rsh-run daemon. */
+ if (am_server)
+ am_daemon = -1;
+
io_set_sock_fds(f_in, f_out);
/* We must load the config file before calling any function that
if (!load_config(0))
exit_cleanup(RERR_SYNTAX);
+ if (lp_proxy_protocol() && !read_proxy_protocol_header(f_in))
+ return -1;
+
+ p = lp_daemon_chroot();
+ if (*p) {
+ log_init(0); /* Make use we've initialized syslog before chrooting. */
+ if (chroot(p) < 0 || chdir("/") < 0) {
+ rsyserr(FLOG, errno, "daemon chroot %s failed", p);
+ return -1;
+ }
+ }
+ p = lp_daemon_gid();
+ if (*p) {
+ gid_t gid;
+ if (!group_to_gid(p, &gid, True)) {
+ rprintf(FLOG, "Invalid daemon gid: %s\n", p);
+ return -1;
+ }
+ if (setgid(gid) < 0) {
+ rsyserr(FLOG, errno, "Unable to set group to daemon gid %ld", (long)gid);
+ return -1;
+ }
+ our_gid = MY_GID();
+ }
+ p = lp_daemon_uid();
+ if (*p) {
+ uid_t uid;
+ if (!user_to_uid(p, &uid, True)) {
+ rprintf(FLOG, "Invalid daemon uid: %s\n", p);
+ return -1;
+ }
+ if (setuid(uid) < 0) {
+ rsyserr(FLOG, errno, "Unable to set user to daemon uid %ld", (long)uid);
+ return -1;
+ }
+ our_uid = MY_UID();
+ am_root = (our_uid == ROOT_UID);
+ }
+
addr = client_addr(f_in);
- host = lp_reverse_lookup(-1) ? client_name(f_in) : undetermined_hostname;
+ host = lp_reverse_lookup(-1) ? client_name(addr) : undetermined_hostname;
rprintf(FLOG, "connect from %s (%s)\n", host, addr);
- if (!am_server) {
+ if (am_daemon > 0) {
set_socket_options(f_in, "SO_KEEPALIVE");
set_nonblocking(f_in);
}
return -1;
line[0] = 0;
- if (!read_line_old(f_in, line, sizeof line))
+ if (!read_line_old(f_in, line, sizeof line, 0))
return -1;
+ if (strncmp(line, EARLY_INPUT_CMD, EARLY_INPUT_CMDLEN) == 0) {
+ early_input_len = strtol(line + EARLY_INPUT_CMDLEN, NULL, 10);
+ if (early_input_len <= 0 || early_input_len > BIGPATHBUFLEN) {
+ io_printf(f_out, "@ERROR: invalid early_input length\n");
+ return -1;
+ }
+ early_input = new_array(char, early_input_len);
+ read_buf(f_in, early_input, early_input_len);
+
+ if (!read_line_old(f_in, line, sizeof line, 0))
+ return -1;
+ }
+
if (!*line || strcmp(line, "#list") == 0) {
rprintf(FLOG, "module-list request from %s (%s)\n",
host, addr);
static void create_pid_file(void)
{
char *pid_file = lp_pid_file();
- char pidbuf[16];
- pid_t pid = getpid();
- int fd, len;
+ char pidbuf[32];
+ STRUCT_STAT st1, st2;
+ char *fail = NULL;
if (!pid_file || !*pid_file)
return;
- cleanup_set_pid(pid);
- if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) {
- failure:
- cleanup_set_pid(0);
- fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno));
- rsyserr(FLOG, errno, "failed to create pid file %s", pid_file);
+#ifdef O_NOFOLLOW
+#define SAFE_OPEN_FLAGS (O_CREAT|O_NOFOLLOW)
+#else
+#define SAFE_OPEN_FLAGS (O_CREAT)
+#endif
+
+ /* These tests make sure that a temp-style lock dir is handled safely. */
+ st1.st_mode = 0;
+ if (do_lstat(pid_file, &st1) == 0 && !S_ISREG(st1.st_mode) && unlink(pid_file) < 0)
+ fail = "unlink";
+ else if ((pid_file_fd = do_open(pid_file, O_RDWR|SAFE_OPEN_FLAGS, 0664)) < 0)
+ fail = S_ISREG(st1.st_mode) ? "open" : "create";
+ else if (!lock_range(pid_file_fd, 0, 4))
+ fail = "lock";
+ else if (do_fstat(pid_file_fd, &st1) < 0)
+ fail = "fstat opened";
+ else if (st1.st_size > (int)sizeof pidbuf)
+ fail = "find small";
+ else if (do_lstat(pid_file, &st2) < 0)
+ fail = "lstat";
+ else if (!S_ISREG(st1.st_mode))
+ fail = "avoid file overwrite race for";
+ else if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
+ fail = "verify stat info for";
+#ifdef HAVE_FTRUNCATE
+ else if (do_ftruncate(pid_file_fd, 0) < 0)
+ fail = "truncate";
+#endif
+ else {
+ pid_t pid = getpid();
+ int len = snprintf(pidbuf, sizeof pidbuf, "%d\n", (int)pid);
+#ifndef HAVE_FTRUNCATE
+ /* What can we do with a too-long file and no truncate? I guess we'll add extra newlines. */
+ while (len < st1.st_size) /* We already verified that st_size chars fits in the buffer. */
+ pidbuf[len++] = '\n';
+ /* We don't need the buffer to end in a '\0' (and we may not have room to add it). */
+#endif
+ if (write(pid_file_fd, pidbuf, len) != len)
+ fail = "write";
+ cleanup_set_pid(pid); /* Mark the file for removal on exit, even if the write failed. */
+ }
+
+ if (fail) {
+ char msg[1024];
+ snprintf(msg, sizeof msg, "failed to %s pid file %s: %s\n",
+ fail, pid_file, strerror(errno));
+ fputs(msg, stderr);
+ rprintf(FLOG, "%s", msg);
exit_cleanup(RERR_FILEIO);
}
- snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
- len = strlen(pidbuf);
- if (write(fd, pidbuf, len) != len)
- goto failure;
- close(fd);
+
+ /* The file is left open so that the lock remains valid. It is closed in our forked child procs. */
}
/* Become a daemon, discarding the controlling terminal. */
log_init(0);
rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n",
- RSYNC_VERSION, rsync_port);
+ rsync_version(), rsync_port);
/* TODO: If listening on a particular address, then show that
- * address too. In fact, why not just do inet_ntop on the
+ * address too. In fact, why not just do getnameinfo on the
* local address??? */
start_accept_loop(rsync_port, start_daemon);
git.samba.org / rsync.git / blobdiff