dbus-sysdeps-util-unix.c
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* dbus-sysdeps-util-unix.c Would be in dbus-sysdeps-unix.c, but not used in libdbus
*
* Copyright (C) 2002, 2003, 2004, 2005 Red Hat, Inc.
* Copyright (C) 2003 CodeFactory AB
*
* SPDX-License-Identifier: AFL-2.1 OR GPL-2.0-or-later
*
* Licensed under the Academic Free License version 2.1
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <config.h>
#include "dbus-sysdeps.h"
#include "dbus-sysdeps-unix.h"
#include "dbus-internals.h"
#include "dbus-list.h"
#include "dbus-pipe.h"
#include "dbus-protocol.h"
#include "dbus-string.h"
#define DBUS_USERDB_INCLUDES_PRIVATE 1
#include "dbus-userdb.h"
#include "dbus-test.h"
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include <grp.h>
#include <sys/socket.h>
#include <dirent.h>
#include <sys/un.h>
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
#ifdef HAVE_SYSTEMD
#include <systemd/sd-daemon.h>
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
dbus_bool_t
_dbus_become_daemon (const DBusString *pidfile,
DBusPipe *print_pid_pipe,
DBusError *error,
dbus_bool_t keep_umask)
{
const char *s;
pid_t child_pid;
DBusEnsureStandardFdsFlags flags;
_dbus_verbose ("Becoming a daemon...\n");
_dbus_verbose ("chdir to /\n");
if (chdir ("/") < 0)
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Could not chdir() to root directory");
return FALSE;
}
_dbus_verbose ("forking...\n");
/* Make sure our output buffers aren't redundantly printed by both the
* parent and the child */
fflush (stdout);
fflush (stderr);
switch ((child_pid = fork ()))
{
case -1:
_dbus_verbose ("fork failed\n");
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to fork daemon: %s", _dbus_strerror (errno));
return FALSE;
break;
case 0:
_dbus_verbose ("in child, closing std file descriptors\n");
flags = DBUS_FORCE_STDIN_NULL | DBUS_FORCE_STDOUT_NULL;
s = _dbus_getenv ("DBUS_DEBUG_OUTPUT");
if (s == NULL || *s == '\0')
flags |= DBUS_FORCE_STDERR_NULL;
else
_dbus_verbose ("keeping stderr open due to DBUS_DEBUG_OUTPUT\n");
if (!_dbus_ensure_standard_fds (flags, &s))
{
_dbus_warn ("%s: %s", s, _dbus_strerror (errno));
_exit (1);
}
if (!keep_umask)
{
/* Get a predictable umask */
_dbus_verbose ("setting umask\n");
umask (022);
}
_dbus_verbose ("calling setsid()\n");
if (setsid () == -1)
_dbus_assert_not_reached ("setsid() failed");
break;
default:
if (!_dbus_write_pid_to_file_and_pipe (pidfile, print_pid_pipe,
child_pid, error))
{
_dbus_verbose ("pid file or pipe write failed: %s\n",
error->message);
kill (child_pid, SIGTERM);
return FALSE;
}
_dbus_verbose ("parent exiting\n");
_exit (0);
break;
}
return TRUE;
}
static dbus_bool_t
_dbus_write_pid_file (const DBusString *filename,
unsigned long pid,
DBusError *error)
{
const char *cfilename;
int fd;
FILE *f;
cfilename = _dbus_string_get_const_data (filename);
fd = open (cfilename, O_WRONLY|O_CREAT|O_EXCL|O_BINARY, 0644);
if (fd < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to open \"%s\": %s", cfilename,
_dbus_strerror (errno));
return FALSE;
}
if ((f = fdopen (fd, "w")) == NULL)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to fdopen fd %d: %s", fd, _dbus_strerror (errno));
_dbus_close (fd, NULL);
return FALSE;
}
if (fprintf (f, "%lu\n", pid) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to write to \"%s\": %s", cfilename,
_dbus_strerror (errno));
fclose (f);
return FALSE;
}
if (fclose (f) == EOF)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to close \"%s\": %s", cfilename,
_dbus_strerror (errno));
return FALSE;
}
return TRUE;
}
dbus_bool_t
_dbus_write_pid_to_file_and_pipe (const DBusString *pidfile,
DBusPipe *print_pid_pipe,
dbus_pid_t pid_to_write,
DBusError *error)
{
if (pidfile)
{
_dbus_verbose ("writing pid file %s\n", _dbus_string_get_const_data (pidfile));
if (!_dbus_write_pid_file (pidfile,
pid_to_write,
error))
{
_dbus_verbose ("pid file write failed\n");
_DBUS_ASSERT_ERROR_IS_SET(error);
return FALSE;
}
}
else
{
_dbus_verbose ("No pid file requested\n");
}
if (print_pid_pipe != NULL && _dbus_pipe_is_valid (print_pid_pipe))
{
DBusString pid;
int bytes;
_dbus_verbose ("writing our pid to pipe %d\n",
print_pid_pipe->fd);
if (!_dbus_string_init (&pid))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_append_printf (&pid, DBUS_PID_FORMAT "\n", pid_to_write))
{
_dbus_string_free (&pid);
_DBUS_SET_OOM (error);
return FALSE;
}
bytes = _dbus_string_get_length (&pid);
if (_dbus_pipe_write (print_pid_pipe, &pid, 0, bytes, error) != bytes)
{
/* _dbus_pipe_write sets error only on failure, not short write */
if (error != NULL && !dbus_error_is_set(error))
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Printing message bus PID: did not write enough bytes\n");
}
_dbus_string_free (&pid);
return FALSE;
}
_dbus_string_free (&pid);
}
else
{
_dbus_verbose ("No pid pipe to write to\n");
}
return TRUE;
}
dbus_bool_t
_dbus_verify_daemon_user (const char *user)
{
DBusString u;
_dbus_string_init_const (&u, user);
return _dbus_get_user_id_and_primary_group (&u, NULL, NULL);
}
/* The HAVE_LIBAUDIT case lives in selinux.c */
#ifndef HAVE_LIBAUDIT
dbus_bool_t
_dbus_change_to_daemon_user (const char *user,
DBusError *error)
{
dbus_uid_t uid;
dbus_gid_t gid;
DBusString u;
_dbus_string_init_const (&u, user);
if (!_dbus_get_user_id_and_primary_group (&u, &uid, &gid))
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"User '%s' does not appear to exist?",
user);
return FALSE;
}
/* setgroups() only works if we are a privileged process,
* so we don't return error on failure; the only possible
* failure is that we don't have perms to do it.
*
* not sure this is right, maybe if setuid()
* is going to work then setgroups() should also work.
*/
if (setgroups (0, NULL) < 0)
_dbus_warn ("Failed to drop supplementary groups: %s",
_dbus_strerror (errno));
/* Set GID first, or the setuid may remove our permission
* to change the GID
*/
if (setgid (gid) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to set GID to %lu: %s", gid,
_dbus_strerror (errno));
return FALSE;
}
if (setuid (uid) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to set UID to %lu: %s", uid,
_dbus_strerror (errno));
return FALSE;
}
return TRUE;
}
#endif /* !HAVE_LIBAUDIT */
#ifdef HAVE_SETRLIMIT
/* We assume that if we have setrlimit, we also have getrlimit and
* struct rlimit.
*/
struct DBusRLimit {
struct rlimit lim;
};
DBusRLimit *
_dbus_rlimit_save_fd_limit (DBusError *error)
{
DBusRLimit *self;
self = dbus_new0 (DBusRLimit, 1);
if (self == NULL)
{
_DBUS_SET_OOM (error);
return NULL;
}
if (getrlimit (RLIMIT_NOFILE, &self->lim) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to get fd limit: %s", _dbus_strerror (errno));
dbus_free (self);
return NULL;
}
return self;
}
/* Enough fds that we shouldn't run out, even if several uids work
* together to carry out a denial-of-service attack. This happens to be
* the same number that systemd < 234 would normally use. */
#define ENOUGH_FDS 65536
dbus_bool_t
_dbus_rlimit_raise_fd_limit (DBusError *error)
{
struct rlimit old, lim;
if (getrlimit (RLIMIT_NOFILE, &lim) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to get fd limit: %s", _dbus_strerror (errno));
return FALSE;
}
old = lim;
if (getuid () == 0)
{
/* We are privileged, so raise the soft limit to at least
* ENOUGH_FDS, and the hard limit to at least the desired soft
* limit. This assumes we can exercise CAP_SYS_RESOURCE on Linux,
* or other OSs' equivalents. */
if (lim.rlim_cur != RLIM_INFINITY &&
lim.rlim_cur < ENOUGH_FDS)
lim.rlim_cur = ENOUGH_FDS;
if (lim.rlim_max != RLIM_INFINITY &&
lim.rlim_max < lim.rlim_cur)
lim.rlim_max = lim.rlim_cur;
}
/* Raise the soft limit to match the hard limit, which we can do even
* if we are unprivileged. In particular, systemd >= 240 will normally
* set rlim_cur to 1024 and rlim_max to 512*1024, recent Debian
* versions end up setting rlim_cur to 1024 and rlim_max to 1024*1024,
* and older and non-systemd Linux systems would typically set rlim_cur
* to 1024 and rlim_max to 4096. */
if (lim.rlim_max == RLIM_INFINITY || lim.rlim_cur < lim.rlim_max)
{
#if defined(__APPLE__) && defined(__MACH__)
/* macOS 10.5 and above no longer allows RLIM_INFINITY for rlim_cur */
lim.rlim_cur = MIN (OPEN_MAX, lim.rlim_max);
#else
lim.rlim_cur = lim.rlim_max;
#endif
}
/* Early-return if there is nothing to do. */
if (lim.rlim_max == old.rlim_max &&
lim.rlim_cur == old.rlim_cur)
return TRUE;
if (setrlimit (RLIMIT_NOFILE, &lim) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to set fd limit to %lu: %s",
(unsigned long) lim.rlim_cur,
_dbus_strerror (errno));
return FALSE;
}
return TRUE;
}
dbus_bool_t
_dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
DBusError *error)
{
if (setrlimit (RLIMIT_NOFILE, &saved->lim) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to restore old fd limit: %s",
_dbus_strerror (errno));
return FALSE;
}
return TRUE;
}
#else /* !HAVE_SETRLIMIT */
static void
fd_limit_not_supported (DBusError *error)
{
dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
"cannot change fd limit on this platform");
}
DBusRLimit *
_dbus_rlimit_save_fd_limit (DBusError *error)
{
fd_limit_not_supported (error);
return NULL;
}
dbus_bool_t
_dbus_rlimit_raise_fd_limit (DBusError *error)
{
fd_limit_not_supported (error);
return FALSE;
}
dbus_bool_t
_dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
DBusError *error)
{
fd_limit_not_supported (error);
return FALSE;
}
#endif
void
_dbus_rlimit_free (DBusRLimit *lim)
{
dbus_free (lim);
}
void
_dbus_set_signal_handler (int sig,
DBusSignalHandler handler)
{
struct sigaction act;
sigset_t empty_mask;
sigemptyset (&empty_mask);
act.sa_handler = handler;
act.sa_mask = empty_mask;
act.sa_flags = 0;
sigaction (sig, &act, NULL);
}
dbus_bool_t
_dbus_file_exists (const char *file)
{
return (access (file, F_OK) == 0);
}
dbus_bool_t
_dbus_path_is_absolute (const DBusString *filename)
{
if (_dbus_string_get_length (filename) > 0)
return _dbus_string_get_byte (filename, 0) == '/';
else
return FALSE;
}
dbus_bool_t
_dbus_stat (const DBusString *filename,
DBusStat *statbuf,
DBusError *error)
{
const char *filename_c;
struct stat sb;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
filename_c = _dbus_string_get_const_data (filename);
if (stat (filename_c, &sb) < 0)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"%s", _dbus_strerror (errno));
return FALSE;
}
statbuf->mode = sb.st_mode;
statbuf->nlink = sb.st_nlink;
statbuf->uid = sb.st_uid;
statbuf->gid = sb.st_gid;
statbuf->size = sb.st_size;
statbuf->atime = sb.st_atime;
statbuf->mtime = sb.st_mtime;
statbuf->ctime = sb.st_ctime;
return TRUE;
}
struct DBusDirIter
{
DIR *d;
};
DBusDirIter*
_dbus_directory_open (const DBusString *filename,
DBusError *error)
{
DIR *d;
DBusDirIter *iter;
const char *filename_c;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
filename_c = _dbus_string_get_const_data (filename);
d = opendir (filename_c);
if (d == NULL)
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Failed to read directory \"%s\": %s",
filename_c,
_dbus_strerror (errno));
return NULL;
}
iter = dbus_new0 (DBusDirIter, 1);
if (iter == NULL)
{
closedir (d);
dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
"Could not allocate memory for directory iterator");
return NULL;
}
iter->d = d;
return iter;
}
dbus_bool_t
_dbus_directory_get_next_file (DBusDirIter *iter,
DBusString *filename,
DBusError *error)
{
struct dirent *ent;
int err;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
again:
errno = 0;
ent = readdir (iter->d);
if (!ent)
{
err = errno;
if (err != 0)
dbus_set_error (error,
_dbus_error_from_errno (err),
"%s", _dbus_strerror (err));
return FALSE;
}
else if (ent->d_name[0] == '.' &&
(ent->d_name[1] == '\0' ||
(ent->d_name[1] == '.' && ent->d_name[2] == '\0')))
goto again;
else
{
_dbus_string_set_length (filename, 0);
if (!_dbus_string_append (filename, ent->d_name))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
"No memory to read directory entry");
return FALSE;
}
else
{
return TRUE;
}
}
}
void
_dbus_directory_close (DBusDirIter *iter)
{
closedir (iter->d);
dbus_free (iter);
}
static dbus_bool_t
fill_user_info_from_group (struct group *g,
DBusGroupInfo *info,
DBusError *error)
{
_dbus_assert (g->gr_name != NULL);
info->gid = g->gr_gid;
info->groupname = _dbus_strdup (g->gr_name);
/* info->members = dbus_strdupv (g->gr_mem) */
if (info->groupname == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return FALSE;
}
return TRUE;
}
static dbus_bool_t
fill_group_info (DBusGroupInfo *info,
dbus_gid_t gid,
const DBusString *groupname,
DBusError *error)
{
const char *group_c_str;
_dbus_assert (groupname != NULL || gid != DBUS_GID_UNSET);
_dbus_assert (groupname == NULL || gid == DBUS_GID_UNSET);
if (groupname)
group_c_str = _dbus_string_get_const_data (groupname);
else
group_c_str = NULL;
/* For now assuming that the getgrnam() and getgrgid() flavors
* always correspond to the pwnam flavors, if not we have
* to add more configure checks.
*/
#ifdef HAVE_GETPWNAM_R
{
struct group *g;
int result;
size_t buflen;
char *buf;
struct group g_str;
dbus_bool_t b;
/* retrieve maximum needed size for buf */
buflen = sysconf (_SC_GETGR_R_SIZE_MAX);
/* sysconf actually returns a long, but everything else expects size_t,
* so just recast here.
* https://bugs.freedesktop.org/show_bug.cgi?id=17061
*/
if ((long) buflen <= 0)
buflen = 1024;
result = -1;
while (1)
{
buf = dbus_malloc (buflen);
if (buf == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return FALSE;
}
g = NULL;
if (group_c_str)
result = getgrnam_r (group_c_str, &g_str, buf, buflen,
&g);
else
result = getgrgid_r (gid, &g_str, buf, buflen,
&g);
/* Try a bigger buffer if ERANGE was returned:
https://bugs.freedesktop.org/show_bug.cgi?id=16727
*/
if (result == ERANGE && buflen < 512 * 1024)
{
dbus_free (buf);
buflen *= 2;
}
else
{
break;
}
}
if (result == 0 && g == &g_str)
{
b = fill_user_info_from_group (g, info, error);
dbus_free (buf);
return b;
}
else
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Group %s unknown or failed to look it up\n",
group_c_str ? group_c_str : "???");
dbus_free (buf);
return FALSE;
}
}
#else /* ! HAVE_GETPWNAM_R */
{
/* I guess we're screwed on thread safety here */
struct group *g;
#warning getpwnam_r() not available, please report this to the dbus maintainers with details of your OS
g = getgrnam (group_c_str);
if (g != NULL)
{
return fill_user_info_from_group (g, info, error);
}
else
{
dbus_set_error (error, _dbus_error_from_errno (errno),
"Group %s unknown or failed to look it up\n",
group_c_str ? group_c_str : "???");
return FALSE;
}
}
#endif /* ! HAVE_GETPWNAM_R */
}
dbus_bool_t
_dbus_group_info_fill (DBusGroupInfo *info,
const DBusString *groupname,
DBusError *error)
{
return fill_group_info (info, DBUS_GID_UNSET,
groupname, error);
}
dbus_bool_t
_dbus_group_info_fill_gid (DBusGroupInfo *info,
dbus_gid_t gid,
DBusError *error)
{
return fill_group_info (info, gid, NULL, error);
}
dbus_bool_t
_dbus_parse_unix_user_from_config (const DBusString *username,
dbus_uid_t *uid_p)
{
return _dbus_get_user_id (username, uid_p);
}
dbus_bool_t
_dbus_parse_unix_group_from_config (const DBusString *groupname,
dbus_gid_t *gid_p)
{
return _dbus_get_group_id (groupname, gid_p);
}
dbus_bool_t
_dbus_unix_groups_from_uid (dbus_uid_t uid,
dbus_gid_t **group_ids,
int *n_group_ids,
DBusError *error)
{
return _dbus_groups_from_uid (uid, group_ids, n_group_ids, error);
}
dbus_bool_t
_dbus_unix_user_is_at_console (dbus_uid_t uid,
DBusError *error)
{
return _dbus_is_console_user (uid, error);
}
dbus_bool_t
_dbus_unix_user_is_process_owner (dbus_uid_t uid)
{
return uid == _dbus_geteuid ();
}
dbus_bool_t
_dbus_windows_user_is_process_owner (const char *windows_sid)
{
return FALSE;
}
/* End of DBusInternalsUtils functions */
dbus_bool_t
_dbus_string_get_dirname (const DBusString *filename,
DBusString *dirname)
{
int sep;
_dbus_assert (filename != dirname);
_dbus_assert (filename != NULL);
_dbus_assert (dirname != NULL);
/* Ignore any separators on the end */
sep = _dbus_string_get_length (filename);
if (sep == 0)
return _dbus_string_append (dirname, "."); /* empty string passed in */
while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
--sep;
_dbus_assert (sep >= 0);
if (sep == 0)
return _dbus_string_append (dirname, "/");
/* Now find the previous separator */
_dbus_string_find_byte_backward (filename, sep, '/', &sep);
if (sep < 0)
return _dbus_string_append (dirname, ".");
/* skip multiple separators */
while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
--sep;
_dbus_assert (sep >= 0);
if (sep == 0 &&
_dbus_string_get_byte (filename, 0) == '/')
return _dbus_string_append (dirname, "/");
else
return _dbus_string_copy_len (filename, 0, sep - 0,
dirname, _dbus_string_get_length (dirname));
}
/* DBusString stuff */
static void
string_squash_nonprintable (DBusString *str)
{
unsigned char *buf;
int i, len;
buf = _dbus_string_get_udata (str);
len = _dbus_string_get_length (str);
/* /proc/$pid/cmdline is a sequence of \0-terminated words, but we
* want a sequence of space-separated words, with no extra trailing
* space:
* "/bin/sleep" "\0" "60" "\0"
* -> "/bin/sleep" "\0" "60"
* -> "/bin/sleep" " " "60"
*
* so chop off the trailing NUL before cleaning up unprintable
* characters. */
if (len > 0 && buf[len - 1] == '\0')
{
_dbus_string_shorten (str, 1);
len--;
}
for (i = 0; i < len; i++)
{
unsigned char c = (unsigned char) buf[i];
if (c == '\0')
buf[i] = ' ';
else if (c < 0x20 || c > 127)
buf[i] = '?';
}
}
dbus_bool_t
_dbus_command_for_pid (unsigned long pid,
DBusString *str,
int max_len,
DBusError *error)
{
/* This is all Linux-specific for now */
DBusString path;
DBusString cmdline;
int fd;
if (!_dbus_string_init (&path))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&cmdline))
{
_DBUS_SET_OOM (error);
_dbus_string_free (&path);
return FALSE;
}
if (!_dbus_string_append_printf (&path, "/proc/%ld/cmdline", pid))
goto oom;
fd = open (_dbus_string_get_const_data (&path), O_RDONLY);
if (fd < 0)
{
dbus_set_error (error,
_dbus_error_from_errno (errno),
"Failed to open \"%s\": %s",
_dbus_string_get_const_data (&path),
_dbus_strerror (errno));
goto fail;
}
if (!_dbus_read (fd, &cmdline, max_len))
{
dbus_set_error (error,
_dbus_error_from_errno (errno),
"Failed to read from \"%s\": %s",
_dbus_string_get_const_data (&path),
_dbus_strerror (errno));
_dbus_close (fd, NULL);
goto fail;
}
if (!_dbus_close (fd, error))
goto fail;
string_squash_nonprintable (&cmdline);
if (!_dbus_string_copy (&cmdline, 0, str, _dbus_string_get_length (str)))
goto oom;
_dbus_string_free (&cmdline);
_dbus_string_free (&path);
return TRUE;
oom:
_DBUS_SET_OOM (error);
fail:
_dbus_string_free (&cmdline);
_dbus_string_free (&path);
return FALSE;
}
dbus_bool_t
_dbus_replace_install_prefix (DBusString *path)
{
return TRUE;
}
static dbus_bool_t
ensure_owned_directory (const char *label,
const DBusString *string,
dbus_bool_t create,
DBusError *error)
{
const char *dir = _dbus_string_get_const_data (string);
struct stat buf;
if (create && !_dbus_ensure_directory (string, error))
return FALSE;
/*
* The stat()-based checks in this function are to protect against
* mistakes, not malice. We are working in a directory that is meant
* to be trusted; but if a user has used `su` or similar to escalate
* their privileges without correctly clearing the environment, the
* XDG_RUNTIME_DIR in the environment might still be the user's
* and not root's. We don't want to write root-owned files into that
* directory, so just warn and don't provide support for transient
* services in that case.
*
* In particular, we use stat() and not lstat() so that if we later
* decide to use a different directory name for transient services,
* we can drop in a compatibility symlink without breaking older
* libdbus.
*/
if (stat (dir, &buf) != 0)
{
int saved_errno = errno;
dbus_set_error (error, _dbus_error_from_errno (saved_errno),
"%s \"%s\" not available: %s", label, dir,
_dbus_strerror (saved_errno));
return FALSE;
}
if (!S_ISDIR (buf.st_mode))
{
dbus_set_error (error, DBUS_ERROR_FAILED, "%s \"%s\" is not a directory",
label, dir);
return FALSE;
}
if (buf.st_uid != geteuid ())
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"%s \"%s\" is owned by uid %ld, not our uid %ld",
label, dir, (long) buf.st_uid, (long) geteuid ());
return FALSE;
}
/* This is just because we have the stat() results already, so we might
* as well check opportunistically. */
if ((S_IWOTH | S_IWGRP) & buf.st_mode)
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"%s \"%s\" can be written by others (mode 0%o)",
label, dir, buf.st_mode);
return FALSE;
}
return TRUE;
}
#define DBUS_UNIX_STANDARD_SESSION_SERVICEDIR "/dbus-1/services"
#define DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR "/dbus-1/system-services"
dbus_bool_t
_dbus_set_up_transient_session_servicedirs (DBusList **dirs,
DBusError *error)
{
const char *xdg_runtime_dir;
DBusString services;
DBusString dbus1;
DBusString xrd;
dbus_bool_t ret = FALSE;
char *data = NULL;
if (!_dbus_string_init (&dbus1))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&services))
{
_dbus_string_free (&dbus1);
_DBUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&xrd))
{
_dbus_string_free (&dbus1);
_dbus_string_free (&services);
_DBUS_SET_OOM (error);
return FALSE;
}
xdg_runtime_dir = _dbus_getenv ("XDG_RUNTIME_DIR");
/* Not an error, we just can't have transient session services */
if (xdg_runtime_dir == NULL)
{
_dbus_verbose ("XDG_RUNTIME_DIR is unset: transient session services "
"not available here\n");
ret = TRUE;
goto out;
}
if (!_dbus_string_append (&xrd, xdg_runtime_dir) ||
!_dbus_string_append_printf (&dbus1, "%s/dbus-1",
xdg_runtime_dir) ||
!_dbus_string_append_printf (&services, "%s/dbus-1/services",
xdg_runtime_dir))
{
_DBUS_SET_OOM (error);
goto out;
}
if (!ensure_owned_directory ("XDG_RUNTIME_DIR", &xrd, FALSE, error) ||
!ensure_owned_directory ("XDG_RUNTIME_DIR subdirectory", &dbus1, TRUE,
error) ||
!ensure_owned_directory ("XDG_RUNTIME_DIR subdirectory", &services,
TRUE, error))
goto out;
if (!_dbus_string_steal_data (&services, &data) ||
!_dbus_list_append (dirs, data))
{
_DBUS_SET_OOM (error);
goto out;
}
_dbus_verbose ("Transient service directory is %s\n", data);
/* Ownership was transferred to @dirs */
data = NULL;
ret = TRUE;
out:
_dbus_string_free (&dbus1);
_dbus_string_free (&services);
_dbus_string_free (&xrd);
dbus_free (data);
return ret;
}
dbus_bool_t
_dbus_get_standard_session_servicedirs (DBusList **dirs)
{
const char *xdg_data_home;
const char *xdg_data_dirs;
DBusString servicedir_path;
if (!_dbus_string_init (&servicedir_path))
return FALSE;
xdg_data_home = _dbus_getenv ("XDG_DATA_HOME");
xdg_data_dirs = _dbus_getenv ("XDG_DATA_DIRS");
if (xdg_data_home != NULL)
{
if (!_dbus_string_append (&servicedir_path, xdg_data_home))
goto oom;
}
else
{
const DBusString *homedir;
DBusString local_share;
if (!_dbus_homedir_from_current_process (&homedir))
goto oom;
if (!_dbus_string_append (&servicedir_path, _dbus_string_get_const_data (homedir)))
goto oom;
_dbus_string_init_const (&local_share, "/.local/share");
if (!_dbus_concat_dir_and_file (&servicedir_path, &local_share))
goto oom;
}
if (!_dbus_string_append (&servicedir_path, ":"))
goto oom;
if (xdg_data_dirs != NULL)
{
if (!_dbus_string_append (&servicedir_path, xdg_data_dirs))
goto oom;
if (!_dbus_string_append (&servicedir_path, ":"))
goto oom;
}
else
{
if (!_dbus_string_append (&servicedir_path, "/usr/local/share:/usr/share:"))
goto oom;
}
/*
* add configured datadir to defaults
* this may be the same as an xdg dir
* however the config parser should take
* care of duplicates
*/
if (!_dbus_string_append (&servicedir_path, DBUS_DATADIR))
goto oom;
if (!_dbus_split_paths_and_append (&servicedir_path,
DBUS_UNIX_STANDARD_SESSION_SERVICEDIR,
dirs))
goto oom;
_dbus_string_free (&servicedir_path);
return TRUE;
oom:
_dbus_string_free (&servicedir_path);
return FALSE;
}
dbus_bool_t
_dbus_get_standard_system_servicedirs (DBusList **dirs)
{
/*
* DBUS_DATADIR may be the same as one of the standard directories. However,
* the config parser should take care of the duplicates.
*
* Also, append /lib as counterpart of /usr/share on the root
* directory (the root directory does not know /share), in order to
* facilitate early boot system bus activation where /usr might not
* be available.
*/
static const char standard_search_path[] =
"/usr/local/share:"
"/usr/share:"
DBUS_DATADIR ":"
"/lib";
DBusString servicedir_path;
_dbus_string_init_const (&servicedir_path, standard_search_path);
return _dbus_split_paths_and_append (&servicedir_path,
DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR,
dirs);
}
dbus_bool_t
_dbus_get_local_system_servicedirs (DBusList **dirs)
{
static const char standard_search_path[] =
"/etc:"
"/run";
DBusString servicedir_path;
_dbus_string_init_const (&servicedir_path, standard_search_path);
return _dbus_split_paths_and_append (&servicedir_path,
DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR,
dirs);
}
dbus_bool_t
_dbus_get_system_config_file (DBusString *str)
{
_dbus_assert (_dbus_string_get_length (str) == 0);
return _dbus_string_append (str, DBUS_SYSTEM_CONFIG_FILE);
}
dbus_bool_t
_dbus_get_session_config_file (DBusString *str)
{
_dbus_assert (_dbus_string_get_length (str) == 0);
return _dbus_string_append (str, DBUS_SESSION_CONFIG_FILE);
}
void
_dbus_daemon_report_ready (void)
{
#ifdef HAVE_SYSTEMD
sd_notify (0, "READY=1");
#endif
}
void
_dbus_daemon_report_reloading (void)
{
#ifdef HAVE_SYSTEMD
sd_notify (0, "RELOADING=1");
#endif
}
void
_dbus_daemon_report_reloaded (void)
{
#ifdef HAVE_SYSTEMD
/* For systemd, this is the same code */
_dbus_daemon_report_ready ();
#endif
}
void
_dbus_daemon_report_stopping (void)
{
#ifdef HAVE_SYSTEMD
sd_notify (0, "STOPPING=1");
#endif
}
dbus_bool_t
_dbus_reset_oom_score_adj (const char **error_str_p)
{
#ifdef __linux__
int fd = -1;
dbus_bool_t ret = FALSE;
int saved_errno = 0;
const char *error_str = NULL;
#ifdef O_CLOEXEC
fd = open ("/proc/self/oom_score_adj", O_RDONLY | O_CLOEXEC);
#endif
if (fd < 0)
{
fd = open ("/proc/self/oom_score_adj", O_RDONLY);
if (fd >= 0)
_dbus_fd_set_close_on_exec (fd);
}
if (fd >= 0)
{
ssize_t read_result = -1;
/* It doesn't actually matter whether we read the whole file,
* as long as we get the presence or absence of the minus sign */
char first_char = '\0';
read_result = read (fd, &first_char, 1);
if (read_result < 0)
{
/* This probably can't actually happen in practice: if we can
* open it, then we can hopefully read from it */
ret = FALSE;
error_str = "failed to read from /proc/self/oom_score_adj";
saved_errno = errno;
goto out;
}
/* If we are running with protection from the OOM killer
* (typical for the system dbus-daemon under systemd), then
* oom_score_adj will be negative. Drop that protection,
* returning to oom_score_adj = 0.
*
* Conversely, if we are running with increased susceptibility
* to the OOM killer (as user sessions typically do in
* systemd >= 250), oom_score_adj will be strictly positive,
* and we are not allowed to decrease it to 0 without privileges.
*
* If it's exactly 0 (typical for non-systemd systems, and
* user processes on older systemd) then there's no need to
* alter it.
*
* We shouldn't get an empty result, but if we do, assume it
* means zero and don't try to change it. */
if (read_result == 0 || first_char != '-')
{
/* Nothing needs to be done: the OOM score adjustment is
* non-negative */
ret = TRUE;
goto out;
}
close (fd);
#ifdef O_CLOEXEC
fd = open ("/proc/self/oom_score_adj", O_WRONLY | O_CLOEXEC);
if (fd < 0)
#endif
{
fd = open ("/proc/self/oom_score_adj", O_WRONLY);
if (fd >= 0)
_dbus_fd_set_close_on_exec (fd);
}
if (fd < 0)
{
ret = FALSE;
error_str = "open(/proc/self/oom_score_adj) for writing";
saved_errno = errno;
goto out;
}
if (pwrite (fd, "0", sizeof (char), 0) < 0)
{
ret = FALSE;
error_str = "writing oom_score_adj error";
saved_errno = errno;
goto out;
}
/* Success */
ret = TRUE;
}
else if (errno == ENOENT)
{
/* If /proc/self/oom_score_adj doesn't exist, assume the kernel
* doesn't support this feature and ignore it. */
ret = TRUE;
}
else
{
ret = FALSE;
error_str = "open(/proc/self/oom_score_adj) for reading";
saved_errno = errno;
goto out;
}
out:
if (fd >= 0)
_dbus_close (fd, NULL);
if (error_str_p != NULL)
*error_str_p = error_str;
errno = saved_errno;
return ret;
#else
/* nothing to do on this platform */
return TRUE;
#endif
}
dbus_set_error
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError.
Definition dbus-errors.c:356
dbus_error_is_set
dbus_bool_t dbus_error_is_set(const DBusError *error)
Checks whether an error occurred (the error is set).
Definition dbus-errors.c:331
_dbus_stat
dbus_bool_t _dbus_stat(const DBusString *filename, DBusStat *statbuf, DBusError *error)
stat() wrapper.
Definition dbus-sysdeps-util-unix.c:593
_dbus_assert_not_reached
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
Definition dbus-internals.h:164
_dbus_write_pid_to_file_and_pipe
dbus_bool_t _dbus_write_pid_to_file_and_pipe(const DBusString *pidfile, DBusPipe *print_pid_pipe, dbus_pid_t pid_to_write, DBusError *error)
Writes the given pid_to_write to a pidfile (if non-NULL) and/or to a pipe (if non-NULL).
Definition dbus-sysdeps-util-unix.c:240
_dbus_assert
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
Definition dbus-internals.h:153
_dbus_file_exists
dbus_bool_t _dbus_file_exists(const char *file)
Checks if a file exists.
Definition dbus-sysdeps-util-unix.c:564
_dbus_homedir_from_current_process
dbus_bool_t _dbus_homedir_from_current_process(const DBusString **homedir)
Gets homedir of user owning current process.
Definition dbus-userdb.c:442
_dbus_directory_close
void _dbus_directory_close(DBusDirIter *iter)
Closes a directory iteration.
Definition dbus-sysdeps-util-unix.c:737
_dbus_group_info_fill
dbus_bool_t _dbus_group_info_fill(DBusGroupInfo *info, const DBusString *groupname, DBusError *error)
Initializes the given DBusGroupInfo struct with information about the given group name.
Definition dbus-sysdeps-util-unix.c:884
_dbus_directory_open
DBusDirIter * _dbus_directory_open(const DBusString *filename, DBusError *error)
Open a directory to iterate over.
Definition dbus-sysdeps-util-unix.c:641
_dbus_parse_unix_user_from_config
dbus_bool_t _dbus_parse_unix_user_from_config(const DBusString *username, dbus_uid_t *uid_p)
Parse a UNIX user from the bus config file.
Definition dbus-sysdeps-util-unix.c:919
_dbus_verify_daemon_user
dbus_bool_t _dbus_verify_daemon_user(const char *user)
Verify that after the fork we can successfully change to this user.
Definition dbus-sysdeps-util-unix.c:313
_dbus_error_from_errno
const char * _dbus_error_from_errno(int error_number)
Converts a UNIX errno, or Windows errno or WinSock error value into a DBusError name.
Definition dbus-sysdeps.c:565
_dbus_set_signal_handler
void _dbus_set_signal_handler(int sig, DBusSignalHandler handler)
Installs a UNIX signal handler.
Definition dbus-sysdeps-util-unix.c:545
_dbus_path_is_absolute
dbus_bool_t _dbus_path_is_absolute(const DBusString *filename)
Checks whether the filename is an absolute path.
Definition dbus-sysdeps-util-unix.c:576
_dbus_strdup
char * _dbus_strdup(const char *str)
Duplicates a string.
Definition dbus-internals.c:621
_dbus_change_to_daemon_user
dbus_bool_t _dbus_change_to_daemon_user(const char *user, DBusError *error)
Changes the user and group the bus is running as.
Definition dbus-sysdeps-util-unix.c:333
_dbus_unix_user_is_process_owner
dbus_bool_t _dbus_unix_user_is_process_owner(dbus_uid_t uid)
Checks to see if the UNIX user ID matches the UID of the process.
Definition dbus-sysdeps-util-unix.c:986
_dbus_get_group_id
dbus_bool_t _dbus_get_group_id(const DBusString *groupname, dbus_gid_t *gid)
Gets group ID given groupname.
Definition dbus-userdb-util.c:145
_dbus_windows_user_is_process_owner
dbus_bool_t _dbus_windows_user_is_process_owner(const char *windows_sid)
Checks to see if the Windows user SID matches the owner of the process.
Definition dbus-sysdeps-util-unix.c:999
_dbus_parse_unix_group_from_config
dbus_bool_t _dbus_parse_unix_group_from_config(const DBusString *groupname, dbus_gid_t *gid_p)
Parse a UNIX group from the bus config file.
Definition dbus-sysdeps-util-unix.c:935
_dbus_unix_groups_from_uid
dbus_bool_t _dbus_unix_groups_from_uid(dbus_uid_t uid, dbus_gid_t **group_ids, int *n_group_ids, DBusError *error)
Gets all groups corresponding to the given UNIX user ID.
Definition dbus-sysdeps-util-unix.c:953
_dbus_is_console_user
dbus_bool_t _dbus_is_console_user(dbus_uid_t uid, DBusError *error)
Checks to see if the UID sent in is the console user.
Definition dbus-userdb-util.c:67
_dbus_groups_from_uid
dbus_bool_t _dbus_groups_from_uid(dbus_uid_t uid, dbus_gid_t **group_ids, int *n_group_ids, DBusError *error)
Gets all groups corresponding to the given UID.
Definition dbus-userdb-util.c:349
_dbus_directory_get_next_file
dbus_bool_t _dbus_directory_get_next_file(DBusDirIter *iter, DBusString *filename, DBusError *error)
Get next file in the directory.
Definition dbus-sysdeps-util-unix.c:689
_dbus_warn
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
Definition dbus-internals.c:278
_dbus_get_user_id_and_primary_group
dbus_bool_t _dbus_get_user_id_and_primary_group(const DBusString *username, dbus_uid_t *uid_p, dbus_gid_t *gid_p)
Gets user ID and primary group given username.
Definition dbus-userdb-util.c:186
_dbus_become_daemon
dbus_bool_t _dbus_become_daemon(const DBusString *pidfile, DBusPipe *print_pid_pipe, DBusError *error, dbus_bool_t keep_umask)
Does the chdir, fork, setsid, etc.
Definition dbus-sysdeps-util-unix.c:86
_dbus_group_info_fill_gid
dbus_bool_t _dbus_group_info_fill_gid(DBusGroupInfo *info, dbus_gid_t gid, DBusError *error)
Initializes the given DBusGroupInfo struct with information about the given group ID.
Definition dbus-sysdeps-util-unix.c:903
_dbus_unix_user_is_at_console
dbus_bool_t _dbus_unix_user_is_at_console(dbus_uid_t uid, DBusError *error)
Checks to see if the UNIX user ID is at the console.
Definition dbus-sysdeps-util-unix.c:971
_dbus_get_user_id
dbus_bool_t _dbus_get_user_id(const DBusString *username, dbus_uid_t *uid)
Gets user ID given username.
Definition dbus-userdb-util.c:131
_dbus_list_append
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition dbus-list.c:273
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
Definition dbus-macros.h:51
TRUE
#define TRUE
Expands to "1".
Definition dbus-macros.h:41
FALSE
#define FALSE
Expands to "0".
Definition dbus-macros.h:44
dbus_free
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition dbus-memory.c:710
dbus_new0
#define dbus_new0(type, count)
Safe macro for using dbus_malloc0().
Definition dbus-memory.h:60
dbus_malloc
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc().
Definition dbus-memory.c:470
DBUS_ERROR_NOT_SUPPORTED
#define DBUS_ERROR_NOT_SUPPORTED
Requested operation isn't supported (like ENOSYS on UNIX).
Definition dbus-protocol.h:375
DBUS_ERROR_FAILED
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more.
Definition dbus-protocol.h:361
DBUS_ERROR_NO_MEMORY
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
Definition dbus-protocol.h:363
_dbus_string_set_length
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
Definition dbus-string.c:847
_dbus_string_append
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
Definition dbus-string.c:980
_dbus_string_init
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition dbus-string.c:182
_dbus_string_init_const
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
Definition dbus-string.c:197
_dbus_string_copy
dbus_bool_t _dbus_string_copy(const DBusString *source, int start, DBusString *dest, int insert_at)
Like _dbus_string_move(), but does not delete the section of the source string that's copied to the d...
Definition dbus-string.c:1345
_dbus_string_steal_data
dbus_bool_t _dbus_string_steal_data(DBusString *str, char **data_return)
Like _dbus_string_get_data(), but removes the gotten data from the original string.
Definition dbus-string.c:686
_dbus_string_free
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(), and fills it with the same contents as _DBUS_STRING_IN...
Definition dbus-string.c:278
_dbus_string_shorten
void _dbus_string_shorten(DBusString *str, int length_to_remove)
Makes a string shorter by the given number of bytes.
Definition dbus-string.c:825
_dbus_string_find_byte_backward
dbus_bool_t _dbus_string_find_byte_backward(const DBusString *str, int start, unsigned char byte, int *found)
Find the given byte scanning backward from the given start.
Definition dbus-string-util.c:98
_dbus_string_append_printf
dbus_bool_t _dbus_string_append_printf(DBusString *str, const char *format,...)
Appends a printf-style formatted string to the DBusString.
Definition dbus-string.c:1147
_dbus_string_copy_len
dbus_bool_t _dbus_string_copy_len(const DBusString *source, int start, int len, DBusString *dest, int insert_at)
Like _dbus_string_copy(), but can copy a segment from the middle of the source string.
Definition dbus-string.c:1437
_dbus_string_get_dirname
dbus_bool_t _dbus_string_get_dirname(const DBusString *filename, DBusString *dirname)
Get the directory name from a complete filename.
Definition dbus-sysdeps-util-unix.c:1018
_dbus_reset_oom_score_adj
dbus_bool_t _dbus_reset_oom_score_adj(const char **error_str_p)
If the current process has been protected from the Linux OOM killer (the oom_score_adj process parame...
Definition dbus-sysdeps-util-unix.c:1602
_dbus_close
dbus_bool_t _dbus_close(int fd, DBusError *error)
Closes a file descriptor.
Definition dbus-sysdeps-unix.c:3727
DBusSignalHandler
void(* DBusSignalHandler)(int sig)
A UNIX signal handler.
Definition dbus-sysdeps-unix.h:158
_dbus_fd_set_close_on_exec
void _dbus_fd_set_close_on_exec(int fd)
Sets the file descriptor to be close on exec.
Definition dbus-sysdeps-unix.c:3683
_dbus_read
int _dbus_read(int fd, DBusString *buffer, int count)
Thin wrapper around the read() system call that appends the data it reads to the DBusString buffer.
Definition dbus-sysdeps-unix.c:767
_dbus_ensure_standard_fds
dbus_bool_t _dbus_ensure_standard_fds(DBusEnsureStandardFdsFlags flags, const char **error_str_p)
Ensure that the standard file descriptors stdin, stdout and stderr are open, by opening /dev/null if ...
Definition dbus-sysdeps-unix.c:179
_dbus_geteuid
dbus_uid_t _dbus_geteuid(void)
Gets our effective UID.
Definition dbus-sysdeps-unix.c:3145
_dbus_get_standard_session_servicedirs
dbus_bool_t _dbus_get_standard_session_servicedirs(DBusList **dirs)
Returns the standard directories for a session bus to look for service activation files.
Definition dbus-sysdeps-util-unix.c:1364
_dbus_daemon_report_ready
void _dbus_daemon_report_ready(void)
Report to a service manager that the daemon calling this function is ready for use.
Definition dbus-sysdeps-util-unix.c:1544
dbus_uid_t
unsigned long dbus_uid_t
A user ID.
Definition dbus-sysdeps.h:141
_dbus_get_session_config_file
dbus_bool_t _dbus_get_session_config_file(DBusString *str)
Get the absolute path of the session.conf file.
Definition dbus-sysdeps-util-unix.c:1532
dbus_pid_t
unsigned long dbus_pid_t
A process ID.
Definition dbus-sysdeps.h:139
_dbus_daemon_report_reloading
void _dbus_daemon_report_reloading(void)
Report to a service manager that the daemon calling this function is reloading configuration.
Definition dbus-sysdeps-util-unix.c:1556
dbus_gid_t
unsigned long dbus_gid_t
A group ID.
Definition dbus-sysdeps.h:143
_dbus_command_for_pid
dbus_bool_t _dbus_command_for_pid(unsigned long pid, DBusString *str, int max_len, DBusError *error)
Get a printable string describing the command used to execute the process with pid.
Definition dbus-sysdeps-util-unix.c:1109
_dbus_get_system_config_file
dbus_bool_t _dbus_get_system_config_file(DBusString *str)
Get the absolute path of the system.conf file (there is no system bus on Windows so this can just ret...
Definition dbus-sysdeps-util-unix.c:1518
_dbus_set_up_transient_session_servicedirs
dbus_bool_t _dbus_set_up_transient_session_servicedirs(DBusList **dirs, DBusError *error)
Returns the standard directories for a session bus to look for transient service activation files.
Definition dbus-sysdeps-util-unix.c:1267
_dbus_getenv
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
Definition dbus-sysdeps.c:197
_dbus_get_standard_system_servicedirs
dbus_bool_t _dbus_get_standard_system_servicedirs(DBusList **dirs)
Returns the standard directories for a system bus to look for service activation files.
Definition dbus-sysdeps-util-unix.c:1456
_dbus_get_local_system_servicedirs
dbus_bool_t _dbus_get_local_system_servicedirs(DBusList **dirs)
Returns the local admin directories for a system bus to look for service activation files.
Definition dbus-sysdeps-util-unix.c:1495
_dbus_daemon_report_reloaded
void _dbus_daemon_report_reloaded(void)
Report to a service manager that the daemon calling this function is reloading configuration.
Definition dbus-sysdeps-util-unix.c:1568
DBUS_GID_UNSET
#define DBUS_GID_UNSET
an invalid GID used to represent an uninitialized dbus_gid_t field
Definition dbus-sysdeps.h:150
_dbus_daemon_report_stopping
void _dbus_daemon_report_stopping(void)
Report to a service manager that the daemon calling this function is shutting down.
Definition dbus-sysdeps-util-unix.c:1581
_dbus_concat_dir_and_file
dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory.
Definition dbus-sysdeps-unix.c:3497
_dbus_split_paths_and_append
dbus_bool_t _dbus_split_paths_and_append(DBusString *dirs, const char *suffix, DBusList **dir_list)
Split paths into a list of char strings.
Definition dbus-sysdeps.c:238
_dbus_replace_install_prefix
dbus_bool_t _dbus_replace_install_prefix(DBusString *path)
Replace the DBUS_PREFIX in the given path, in-place, by the current D-Bus installation directory.
Definition dbus-sysdeps-util-unix.c:1185
DBUS_PID_FORMAT
#define DBUS_PID_FORMAT
an appropriate printf format for dbus_pid_t
Definition dbus-sysdeps.h:153
_dbus_ensure_directory
dbus_bool_t _dbus_ensure_directory(const DBusString *filename, DBusError *error)
Creates a directory; succeeds if the directory is created or already existed.
Definition dbus-sysdeps-unix.c:3434
dbus_bool_t
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition dbus-types.h:37
DBusDirIter
Internals of directory iterator.
Definition dbus-sysdeps-util-unix.c:628
DBusDirIter::d
DIR * d
The DIR* from opendir().
Definition dbus-sysdeps-util-unix.c:629
DBusError
Object representing an exception.
Definition dbus-errors.h:51
DBusError::message
const char * message
public error message field
Definition dbus-errors.h:53
DBusGroupInfo
Information about a UNIX group.
Definition dbus-sysdeps-unix.h:107
DBusGroupInfo::gid
dbus_gid_t gid
GID.
Definition dbus-sysdeps-unix.h:109
DBusGroupInfo::groupname
char * groupname
Group name.
Definition dbus-sysdeps-unix.h:110
DBusList
A node in a linked list.
Definition dbus-list.h:37
DBusPipe
Definition dbus-pipe.h:41
DBusStat
Portable struct with stat() results.
Definition dbus-sysdeps.h:570
DBusStat::nlink
unsigned long nlink
Number of hard links.
Definition dbus-sysdeps.h:572
DBusStat::size
unsigned long size
Size of file.
Definition dbus-sysdeps.h:575
DBusStat::uid
dbus_uid_t uid
User owning file.
Definition dbus-sysdeps.h:573
DBusStat::mode
unsigned long mode
File mode.
Definition dbus-sysdeps.h:571
DBusStat::gid
dbus_gid_t gid
Group owning file.
Definition dbus-sysdeps.h:574
DBusStat::atime
unsigned long atime
Access time.
Definition dbus-sysdeps.h:576
DBusStat::ctime
unsigned long ctime
Creation time.
Definition dbus-sysdeps.h:578
DBusStat::mtime
unsigned long mtime
Modify time.
Definition dbus-sysdeps.h:577
DBusString
Definition dbus-string.h:47