diff options
Diffstat (limited to 'src/3rd_party/dbus-1.7.8/dbus/dbus-sysdeps-util-unix.c')
| -rw-r--r-- | src/3rd_party/dbus-1.7.8/dbus/dbus-sysdeps-util-unix.c | 1358 |
1 files changed, 0 insertions, 1358 deletions
diff --git a/src/3rd_party/dbus-1.7.8/dbus/dbus-sysdeps-util-unix.c b/src/3rd_party/dbus-1.7.8/dbus/dbus-sysdeps-util-unix.c deleted file mode 100644 index 0d8a66c714..0000000000 --- a/src/3rd_party/dbus-1.7.8/dbus/dbus-sysdeps-util-unix.c +++ /dev/null @@ -1,1358 +0,0 @@ -/* -*- 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 - * - * 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-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 <stdlib.h> -#include <string.h> -#include <signal.h> -#include <unistd.h> -#include <stdio.h> -#include <errno.h> -#include <fcntl.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_SYSLOG_H -#include <syslog.h> -#endif - -#ifdef HAVE_SYS_SYSLIMITS_H -#include <sys/syslimits.h> -#endif - -#include "sd-daemon.h" - -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -/** - * @addtogroup DBusInternalsUtils - * @{ - */ - - -/** - * Does the chdir, fork, setsid, etc. to become a daemon process. - * - * @param pidfile #NULL, or pidfile to create - * @param print_pid_pipe pipe to print daemon's pid to, or -1 for none - * @param error return location for errors - * @param keep_umask #TRUE to keep the original umask - * @returns #FALSE on failure - */ -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; - int dev_null_fd; - - _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"); - 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"); - - /* silently ignore failures here, if someone - * doesn't have /dev/null we may as well try - * to continue anyhow - */ - - dev_null_fd = open ("/dev/null", O_RDWR); - if (dev_null_fd >= 0) - { - dup2 (dev_null_fd, 0); - dup2 (dev_null_fd, 1); - - s = _dbus_getenv ("DBUS_DEBUG_OUTPUT"); - if (s == NULL || *s == '\0') - dup2 (dev_null_fd, 2); - else - _dbus_verbose ("keeping stderr open due to DBUS_DEBUG_OUTPUT\n"); - close (dev_null_fd); - } - - 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; -} - - -/** - * Creates a file containing the process ID. - * - * @param filename the filename to write to - * @param pid our process ID - * @param error return location for errors - * @returns #FALSE on failure - */ -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; -} - -/** - * Writes the given pid_to_write to a pidfile (if non-NULL) and/or to a - * pipe (if non-NULL). Does nothing if pidfile and print_pid_pipe are both - * NULL. - * - * @param pidfile the file to write to or #NULL - * @param print_pid_pipe the pipe to write to or #NULL - * @param pid_to_write the pid to write out - * @param error error on failure - * @returns FALSE if error is set - */ -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_int (&pid, pid_to_write) || - !_dbus_string_append (&pid, "\n")) - { - _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; -} - -/** - * Verify that after the fork we can successfully change to this user. - * - * @param user the username given in the daemon configuration - * @returns #TRUE if username is valid - */ -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 -/** - * Changes the user and group the bus is running as. - * - * @param user the user to become - * @param error return location for errors - * @returns #FALSE on failure - */ -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\n", - _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 */ - - -/** - * Attempt to ensure that the current process can open - * at least @p limit file descriptors. - * - * If @p limit is lower than the current, it will not be - * lowered. No error is returned if the request can - * not be satisfied. - * - * @param limit number of file descriptors - */ -void -_dbus_request_file_descriptor_limit (unsigned int limit) -{ -#ifdef HAVE_SETRLIMIT - struct rlimit lim; - struct rlimit target_lim; - - /* No point to doing this practically speaking - * if we're not uid 0. We expect the system - * bus to use this before we change UID, and - * the session bus takes the Linux default - * of 1024 for both cur and max. - */ - if (getuid () != 0) - return; - - if (getrlimit (RLIMIT_NOFILE, &lim) < 0) - return; - - if (lim.rlim_cur >= limit) - return; - - /* Ignore "maximum limit", assume we have the "superuser" - * privileges. On Linux this is CAP_SYS_RESOURCE. - */ - target_lim.rlim_cur = target_lim.rlim_max = limit; - /* Also ignore errors; if we fail, we will at least work - * up to whatever limit we had, which seems better than - * just outright aborting. - * - * However, in the future we should probably log this so OS builders - * have a chance to notice any misconfiguration like dbus-daemon - * being started without CAP_SYS_RESOURCE. - */ - setrlimit (RLIMIT_NOFILE, &target_lim); -#endif -} - -void -_dbus_init_system_log (dbus_bool_t is_daemon) -{ -#ifdef HAVE_SYSLOG_H - int logopts = LOG_PID; - -#if HAVE_DECL_LOG_PERROR -#ifdef HAVE_SYSTEMD - if (!is_daemon || sd_booted () <= 0) -#endif - logopts |= LOG_PERROR; -#endif - - openlog ("dbus", logopts, LOG_DAEMON); -#endif -} - -/** - * Log a message to the system log file (e.g. syslog on Unix). - * - * @param severity a severity value - * @param msg a printf-style format string - */ -void -_dbus_system_log (DBusSystemLogSeverity severity, const char *msg, ...) -{ - va_list args; - - va_start (args, msg); - - _dbus_system_logv (severity, msg, args); - - va_end (args); -} - -/** - * Log a message to the system log file (e.g. syslog on Unix). - * - * @param severity a severity value - * @param msg a printf-style format string - * @param args arguments for the format string - * - * If the FATAL severity is given, this function will terminate the program - * with an error code. - */ -void -_dbus_system_logv (DBusSystemLogSeverity severity, const char *msg, va_list args) -{ - va_list tmp; -#ifdef HAVE_SYSLOG_H - int flags; - switch (severity) - { - case DBUS_SYSTEM_LOG_INFO: - flags = LOG_DAEMON | LOG_NOTICE; - break; - case DBUS_SYSTEM_LOG_SECURITY: - flags = LOG_AUTH | LOG_NOTICE; - break; - case DBUS_SYSTEM_LOG_FATAL: - flags = LOG_DAEMON|LOG_CRIT; - break; - default: - return; - } - - DBUS_VA_COPY (tmp, args); - vsyslog (flags, msg, tmp); - va_end (tmp); -#endif - -#if !defined(HAVE_SYSLOG_H) || !HAVE_DECL_LOG_PERROR - { - /* vsyslog() won't write to stderr, so we'd better do it */ - DBUS_VA_COPY (tmp, args); - fprintf (stderr, "dbus[" DBUS_PID_FORMAT "]: ", _dbus_getpid ()); - vfprintf (stderr, msg, tmp); - fputc ('\n', stderr); - va_end (tmp); - } -#endif - - if (severity == DBUS_SYSTEM_LOG_FATAL) - exit (1); -} - -/** Installs a UNIX signal handler - * - * @param sig the signal to handle - * @param handler the handler - */ -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); -} - -/** Checks if a file exists -* -* @param file full path to the file -* @returns #TRUE if file exists -*/ -dbus_bool_t -_dbus_file_exists (const char *file) -{ - return (access (file, F_OK) == 0); -} - -/** Checks if user is at the console -* -* @param username user to check -* @param error return location for errors -* @returns #TRUE is the user is at the consolei and there are no errors -*/ -dbus_bool_t -_dbus_user_at_console (const char *username, - DBusError *error) -{ - - DBusString u, f; - dbus_bool_t result; - - result = FALSE; - if (!_dbus_string_init (&f)) - { - _DBUS_SET_OOM (error); - return FALSE; - } - - if (!_dbus_string_append (&f, DBUS_CONSOLE_AUTH_DIR)) - { - _DBUS_SET_OOM (error); - goto out; - } - - _dbus_string_init_const (&u, username); - - if (!_dbus_concat_dir_and_file (&f, &u)) - { - _DBUS_SET_OOM (error); - goto out; - } - - result = _dbus_file_exists (_dbus_string_get_const_data (&f)); - - out: - _dbus_string_free (&f); - - return result; -} - - -/** - * Checks whether the filename is an absolute path - * - * @param filename the filename - * @returns #TRUE if an absolute path - */ -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; -} - -/** - * stat() wrapper. - * - * @param filename the filename to stat - * @param statbuf the stat info to fill in - * @param error return location for error - * @returns #FALSE if error was set - */ -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; -} - - -/** - * Internals of directory iterator - */ -struct DBusDirIter -{ - DIR *d; /**< The DIR* from opendir() */ - -}; - -/** - * Open a directory to iterate over. - * - * @param filename the directory name - * @param error exception return object or #NULL - * @returns new iterator, or #NULL on error - */ -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; -} - -/** - * Get next file in the directory. Will not return "." or ".." on - * UNIX. If an error occurs, the contents of "filename" are - * undefined. The error is never set if the function succeeds. - * - * This function is not re-entrant, and not necessarily thread-safe. - * Only use it for test code or single-threaded utilities. - * - * @param iter the iterator - * @param filename string to be set to the next file in the dir - * @param error return location for error - * @returns #TRUE if filename was filled in with a new filename - */ -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; - } - } -} - -/** - * Closes a directory iteration. - */ -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. - */ - -#if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_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; -#ifdef HAVE_POSIX_GETPWNAM_R - 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); -#else - g = getgrnam_r (group_c_str, &g_str, buf, buflen); - result = 0; -#endif /* !HAVE_POSIX_GETPWNAM_R */ - /* 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; - - 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 */ -} - -/** - * Initializes the given DBusGroupInfo struct - * with information about the given group name. - * - * @param info the group info struct - * @param groupname name of group - * @param error the error return - * @returns #FALSE if error is set - */ -dbus_bool_t -_dbus_group_info_fill (DBusGroupInfo *info, - const DBusString *groupname, - DBusError *error) -{ - return fill_group_info (info, DBUS_GID_UNSET, - groupname, error); - -} - -/** - * Initializes the given DBusGroupInfo struct - * with information about the given group ID. - * - * @param info the group info struct - * @param gid group ID - * @param error the error return - * @returns #FALSE if error is set - */ -dbus_bool_t -_dbus_group_info_fill_gid (DBusGroupInfo *info, - dbus_gid_t gid, - DBusError *error) -{ - return fill_group_info (info, gid, NULL, error); -} - -/** - * Parse a UNIX user from the bus config file. On Windows, this should - * simply always fail (just return #FALSE). - * - * @param username the username text - * @param uid_p place to return the uid - * @returns #TRUE on success - */ -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); - -} - -/** - * Parse a UNIX group from the bus config file. On Windows, this should - * simply always fail (just return #FALSE). - * - * @param groupname the groupname text - * @param gid_p place to return the gid - * @returns #TRUE on success - */ -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); -} - -/** - * Gets all groups corresponding to the given UNIX user ID. On UNIX, - * just calls _dbus_groups_from_uid(). On Windows, should always - * fail since we don't know any UNIX groups. - * - * @param uid the UID - * @param group_ids return location for array of group IDs - * @param n_group_ids return location for length of returned array - * @returns #TRUE if the UID existed and we got some credentials - */ -dbus_bool_t -_dbus_unix_groups_from_uid (dbus_uid_t uid, - dbus_gid_t **group_ids, - int *n_group_ids) -{ - return _dbus_groups_from_uid (uid, group_ids, n_group_ids); -} - -/** - * Checks to see if the UNIX user ID is at the console. - * Should always fail on Windows (set the error to - * #DBUS_ERROR_NOT_SUPPORTED). - * - * @param uid UID of person to check - * @param error return location for errors - * @returns #TRUE if the UID is the same as the console user and there are no errors - */ -dbus_bool_t -_dbus_unix_user_is_at_console (dbus_uid_t uid, - DBusError *error) -{ - return _dbus_is_console_user (uid, error); - -} - -/** - * Checks to see if the UNIX user ID matches the UID of - * the process. Should always return #FALSE on Windows. - * - * @param uid the UNIX user ID - * @returns #TRUE if this uid owns the process. - */ -dbus_bool_t -_dbus_unix_user_is_process_owner (dbus_uid_t uid) -{ - return uid == _dbus_geteuid (); -} - -/** - * Checks to see if the Windows user SID matches the owner of - * the process. Should always return #FALSE on UNIX. - * - * @param windows_sid the Windows user SID - * @returns #TRUE if this user owns the process. - */ -dbus_bool_t -_dbus_windows_user_is_process_owner (const char *windows_sid) -{ - return FALSE; -} - -/** @} */ /* End of DBusInternalsUtils functions */ - -/** - * @addtogroup DBusString - * - * @{ - */ -/** - * Get the directory name from a complete filename - * @param filename the filename - * @param dirname string to append directory name to - * @returns #FALSE if no memory - */ -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_data (str); - len = _dbus_string_get_length (str); - - 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] = '?'; - } -} - -/** - * Get a printable string describing the command used to execute - * the process with pid. This string should only be used for - * informative purposes such as logging; it may not be trusted. - * - * The command is guaranteed to be printable ASCII and no longer - * than max_len. - * - * @param pid Process id - * @param str Append command to this string - * @param max_len Maximum length of returned command - * @param error return location for errors - * @returns #FALSE on error - */ -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; -} - -/* - * replaces the term DBUS_PREFIX in configure_time_path by the - * current dbus installation directory. On unix this function is a noop - * - * @param configure_time_path - * @return real path - */ -const char * -_dbus_replace_install_prefix (const char *configure_time_path) -{ - return configure_time_path; -} - -#define DBUS_UNIX_STANDARD_SESSION_SERVICEDIR "/dbus-1/services" -#define DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR "/dbus-1/system-services" - -/** - * Returns the standard directories for a session bus to look for service - * activation files - * - * On UNIX this should be the standard xdg freedesktop.org data directories: - * - * XDG_DATA_HOME=${XDG_DATA_HOME-$HOME/.local/share} - * XDG_DATA_DIRS=${XDG_DATA_DIRS-/usr/local/share:/usr/share} - * - * and - * - * DBUS_DATADIR - * - * @param dirs the directory list we are returning - * @returns #FALSE on OOM - */ - -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; -} - - -/** - * Returns the standard directories for a system bus to look for service - * activation files - * - * On UNIX this should be the standard xdg freedesktop.org data directories: - * - * XDG_DATA_DIRS=${XDG_DATA_DIRS-/usr/local/share:/usr/share} - * - * and - * - * DBUS_DATADIR - * - * On Windows there is no system bus and this function can return nothing. - * - * @param dirs the directory list we are returning - * @returns #FALSE on OOM - */ - -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); -} - -/** - * Append the absolute path of the system.conf file - * (there is no system bus on Windows so this can just - * return FALSE and print a warning or something) - * - * @param str the string to append to - * @returns #FALSE if no memory - */ -dbus_bool_t -_dbus_append_system_config_file (DBusString *str) -{ - return _dbus_string_append (str, DBUS_SYSTEM_CONFIG_FILE); -} - -/** - * Append the absolute path of the session.conf file. - * - * @param str the string to append to - * @returns #FALSE if no memory - */ -dbus_bool_t -_dbus_append_session_config_file (DBusString *str) -{ - return _dbus_string_append (str, DBUS_SESSION_CONFIG_FILE); -} |