26 #include "dbus-sysdeps.h"
27 #include "dbus-sysdeps-unix.h"
28 #include "dbus-internals.h"
29 #include "dbus-pipe.h"
30 #include "dbus-protocol.h"
31 #include "dbus-string.h"
32 #define DBUS_USERDB_INCLUDES_PRIVATE 1
33 #include "dbus-userdb.h"
34 #include "dbus-test.h"
36 #include <sys/types.h>
45 #ifdef HAVE_SYS_RESOURCE_H
46 #include <sys/resource.h>
49 #include <sys/socket.h>
54 #ifdef HAVE_SYS_SYSLIMITS_H
55 #include <sys/syslimits.h>
87 _dbus_verbose (
"Becoming a daemon...\n");
89 _dbus_verbose (
"chdir to /\n");
93 "Could not chdir() to root directory");
97 _dbus_verbose (
"forking...\n");
98 switch ((child_pid = fork ()))
101 _dbus_verbose (
"fork failed\n");
103 "Failed to fork daemon: %s", _dbus_strerror (errno));
108 _dbus_verbose (
"in child, closing std file descriptors\n");
115 dev_null_fd = open (
"/dev/null", O_RDWR);
116 if (dev_null_fd >= 0)
118 dup2 (dev_null_fd, 0);
119 dup2 (dev_null_fd, 1);
122 if (s ==
NULL || *s ==
'\0')
123 dup2 (dev_null_fd, 2);
125 _dbus_verbose (
"keeping stderr open due to DBUS_DEBUG_OUTPUT\n");
132 _dbus_verbose (
"setting umask\n");
136 _dbus_verbose (
"calling setsid()\n");
146 _dbus_verbose (
"pid file or pipe write failed: %s\n",
148 kill (child_pid, SIGTERM);
152 _dbus_verbose (
"parent exiting\n");
170 _dbus_write_pid_file (
const DBusString *filename,
174 const char *cfilename;
178 cfilename = _dbus_string_get_const_data (filename);
180 fd = open (cfilename, O_WRONLY|O_CREAT|O_EXCL|O_BINARY, 0644);
185 "Failed to open \"%s\": %s", cfilename,
186 _dbus_strerror (errno));
190 if ((f = fdopen (fd,
"w")) ==
NULL)
193 "Failed to fdopen fd %d: %s", fd, _dbus_strerror (errno));
198 if (fprintf (f,
"%lu\n", pid) < 0)
201 "Failed to write to \"%s\": %s", cfilename,
202 _dbus_strerror (errno));
208 if (fclose (f) == EOF)
211 "Failed to close \"%s\": %s", cfilename,
212 _dbus_strerror (errno));
238 _dbus_verbose (
"writing pid file %s\n", _dbus_string_get_const_data (pidfile));
239 if (!_dbus_write_pid_file (pidfile,
243 _dbus_verbose (
"pid file write failed\n");
244 _DBUS_ASSERT_ERROR_IS_SET(error);
250 _dbus_verbose (
"No pid file requested\n");
253 if (print_pid_pipe !=
NULL && _dbus_pipe_is_valid (print_pid_pipe))
258 _dbus_verbose (
"writing our pid to pipe %d\n",
263 _DBUS_SET_OOM (error);
271 _DBUS_SET_OOM (error);
275 bytes = _dbus_string_get_length (&pid);
276 if (_dbus_pipe_write (print_pid_pipe, &pid, 0, bytes, error) != bytes)
282 "Printing message bus PID: did not write enough bytes\n");
292 _dbus_verbose (
"No pid pipe to write to\n");
316 #ifndef HAVE_LIBAUDIT
337 "User '%s' does not appear to exist?",
349 if (setgroups (0,
NULL) < 0)
350 _dbus_warn (
"Failed to drop supplementary groups: %s\n",
351 _dbus_strerror (errno));
356 if (setgid (gid) < 0)
359 "Failed to set GID to %lu: %s", gid,
360 _dbus_strerror (errno));
364 if (setuid (uid) < 0)
367 "Failed to set UID to %lu: %s", uid,
368 _dbus_strerror (errno));
390 #ifdef HAVE_SETRLIMIT
392 struct rlimit target_lim;
403 if (getrlimit (RLIMIT_NOFILE, &lim) < 0)
406 if (lim.rlim_cur >= limit)
412 target_lim.rlim_cur = target_lim.rlim_max = limit;
421 setrlimit (RLIMIT_NOFILE, &target_lim);
426 _dbus_init_system_log (
void)
428 #if HAVE_DECL_LOG_PERROR
429 openlog (
"dbus", LOG_PID | LOG_PERROR, LOG_DAEMON);
431 openlog (
"dbus", LOG_PID, LOG_DAEMON);
448 va_start (args, msg);
471 case DBUS_SYSTEM_LOG_INFO:
472 flags = LOG_DAEMON | LOG_NOTICE;
474 case DBUS_SYSTEM_LOG_SECURITY:
475 flags = LOG_AUTH | LOG_NOTICE;
477 case DBUS_SYSTEM_LOG_FATAL:
478 flags = LOG_DAEMON|LOG_CRIT;
484 #ifndef HAVE_DECL_LOG_PERROR
489 DBUS_VA_COPY (tmp, args);
491 vfprintf (stderr, msg, tmp);
492 fputc (
'\n', stderr);
497 vsyslog (flags, msg, args);
499 if (severity == DBUS_SYSTEM_LOG_FATAL)
512 struct sigaction act;
515 sigemptyset (&empty_mask);
516 act.sa_handler = handler;
517 act.sa_mask = empty_mask;
519 sigaction (sig, &act,
NULL);
530 return (access (file, F_OK) == 0);
550 _DBUS_SET_OOM (error);
556 _DBUS_SET_OOM (error);
564 _DBUS_SET_OOM (error);
586 if (_dbus_string_get_length (filename) > 0)
587 return _dbus_string_get_byte (filename, 0) ==
'/';
605 const char *filename_c;
608 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
610 filename_c = _dbus_string_get_const_data (filename);
612 if (stat (filename_c, &sb) < 0)
615 "%s", _dbus_strerror (errno));
619 statbuf->
mode = sb.st_mode;
620 statbuf->
nlink = sb.st_nlink;
621 statbuf->
uid = sb.st_uid;
622 statbuf->
gid = sb.st_gid;
623 statbuf->
size = sb.st_size;
624 statbuf->
atime = sb.st_atime;
625 statbuf->
mtime = sb.st_mtime;
626 statbuf->
ctime = sb.st_ctime;
654 const char *filename_c;
656 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
658 filename_c = _dbus_string_get_const_data (filename);
660 d = opendir (filename_c);
664 "Failed to read directory \"%s\": %s",
666 _dbus_strerror (errno));
674 "Could not allocate memory for directory iterator");
704 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
708 ent = readdir (iter->
d);
717 "%s", _dbus_strerror (err));
721 else if (ent->d_name[0] ==
'.' &&
722 (ent->d_name[1] ==
'\0' ||
723 (ent->d_name[1] ==
'.' && ent->d_name[2] ==
'\0')))
731 "No memory to read directory entry");
752 fill_user_info_from_group (
struct group *g,
758 info->
gid = g->gr_gid;
778 const char *group_c_str;
784 group_c_str = _dbus_string_get_const_data (groupname);
793 #if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
803 buflen = sysconf (_SC_GETGR_R_SIZE_MAX);
809 if ((
long) buflen <= 0)
823 #ifdef HAVE_POSIX_GETPWNAM_R
825 result = getgrnam_r (group_c_str, &g_str, buf, buflen,
828 result = getgrgid_r (gid, &g_str, buf, buflen,
831 g = getgrnam_r (group_c_str, &g_str, buf, buflen);
837 if (result == ERANGE && buflen < 512 * 1024)
848 if (result == 0 && g == &g_str)
850 b = fill_user_info_from_group (g, info, error);
857 "Group %s unknown or failed to look it up\n",
858 group_c_str ? group_c_str :
"???");
868 g = getgrnam (group_c_str);
872 return fill_user_info_from_group (g, info, error);
877 "Group %s unknown or failed to look it up\n",
878 group_c_str ? group_c_str :
"???");
918 return fill_group_info (info, gid,
NULL, error);
1037 sep = _dbus_string_get_length (filename);
1041 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) ==
'/')
1055 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) ==
'/')
1061 _dbus_string_get_byte (filename, 0) ==
'/')
1065 dirname, _dbus_string_get_length (dirname));
1075 buf = _dbus_string_get_data (str);
1076 len = _dbus_string_get_length (str);
1078 for (i = 0; i < len; i++)
1080 unsigned char c = (
unsigned char) buf[i];
1083 else if (c < 0x20 || c > 127)
1115 _DBUS_SET_OOM (error);
1121 _DBUS_SET_OOM (error);
1129 fd = open (_dbus_string_get_const_data (&path), O_RDONLY);
1134 "Failed to open \"%s\": %s",
1135 _dbus_string_get_const_data (&path),
1136 _dbus_strerror (errno));
1144 "Failed to read from \"%s\": %s",
1145 _dbus_string_get_const_data (&path),
1146 _dbus_strerror (errno));
1154 string_squash_nonprintable (&cmdline);
1163 _DBUS_SET_OOM (error);