diff options
Diffstat (limited to 'dbus/dbus-sysdeps.c')
| -rw-r--r-- | dbus/dbus-sysdeps.c | 570 |
1 files changed, 17 insertions, 553 deletions
diff --git a/dbus/dbus-sysdeps.c b/dbus/dbus-sysdeps.c index c1ff46ce..5547d6c6 100644 --- a/dbus/dbus-sysdeps.c +++ b/dbus/dbus-sysdeps.c @@ -26,7 +26,7 @@ #include "dbus-sysdeps.h" #include "dbus-threads.h" #include "dbus-protocol.h" -#include "dbus-test.h" +#include "dbus-string.h" #include <sys/types.h> #include <stdlib.h> #include <string.h> @@ -71,6 +71,7 @@ * @addtogroup DBusInternalsUtils * @{ */ +#ifndef DBUS_DISABLE_ASSERT /** * Aborts the program with SIGABRT (dumping core). */ @@ -86,6 +87,7 @@ _dbus_abort (void) abort (); _exit (1); /* in case someone manages to ignore SIGABRT */ } +#endif /** * Wrapper for setenv(). If the value is #NULL, unsets @@ -1051,6 +1053,7 @@ _dbus_string_append_uint (DBusString *str, return TRUE; } +#ifdef DBUS_BUILD_TESTS /** * Appends a double to a DBusString. * @@ -1087,6 +1090,7 @@ _dbus_string_append_double (DBusString *str, return TRUE; } +#endif /* DBUS_BUILD_TESTS */ /** * Parses an integer contained in a DBusString. Either return parameter @@ -1169,6 +1173,7 @@ _dbus_string_parse_uint (const DBusString *str, } #endif /* DBUS_BUILD_TESTS */ +#ifdef DBUS_BUILD_TESTS static dbus_bool_t ascii_isspace (char c) { @@ -1179,13 +1184,17 @@ ascii_isspace (char c) c == '\t' || c == '\v'); } +#endif /* DBUS_BUILD_TESTS */ +#ifdef DBUS_BUILD_TESTS static dbus_bool_t ascii_isdigit (char c) { return c >= '0' && c <= '9'; } +#endif /* DBUS_BUILD_TESTS */ +#ifdef DBUS_BUILD_TESTS static dbus_bool_t ascii_isxdigit (char c) { @@ -1193,8 +1202,9 @@ ascii_isxdigit (char c) (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')); } +#endif /* DBUS_BUILD_TESTS */ - +#ifdef DBUS_BUILD_TESTS /* Calls strtod in a locale-independent fashion, by looking at * the locale data and patching the decimal comma to a point. * @@ -1323,8 +1333,9 @@ ascii_strtod (const char *nptr, return val; } +#endif /* DBUS_BUILD_TESTS */ - +#ifdef DBUS_BUILD_TESTS /** * Parses a floating point number contained in a DBusString. Either * return parameter may be #NULL if you aren't interested in it. The @@ -1363,6 +1374,7 @@ _dbus_string_parse_double (const DBusString *str, return TRUE; } +#endif /* DBUS_BUILD_TESTS */ /** @} */ /* DBusString group */ @@ -2416,34 +2428,6 @@ _dbus_create_directory (const DBusString *filename, } /** - * Removes a directory; Directory must be empty - * - * @param filename directory filename - * @param error initialized error object - * @returns #TRUE on success - */ -dbus_bool_t -_dbus_delete_directory (const DBusString *filename, - DBusError *error) -{ - const char *filename_c; - - _DBUS_ASSERT_ERROR_IS_CLEAR (error); - - filename_c = _dbus_string_get_const_data (filename); - - if (rmdir (filename_c) != 0) - { - dbus_set_error (error, DBUS_ERROR_FAILED, - "Failed to remove directory %s: %s\n", - filename_c, _dbus_strerror (errno)); - return FALSE; - } - - return TRUE; -} - -/** * Appends the given filename to the given directory. * * @todo it might be cute to collapse multiple '/' such as "foo//" @@ -2484,69 +2468,6 @@ _dbus_concat_dir_and_file (DBusString *dir, } /** - * 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)); -} - -/** - * 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; -} - -/** * Internals of directory iterator */ struct DBusDirIter @@ -2938,45 +2859,6 @@ _dbus_exit (int code) } /** - * 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; -} - -/** * Creates a full-duplex pipe (as in socketpair()). * Sets both ends of the pipe nonblocking. * @@ -3099,6 +2981,7 @@ _dbus_set_fd_nonblocking (int fd, return TRUE; } +#if !defined (DBUS_DISABLE_ASSERT) || defined(DBUS_BUILD_TESTS) /** * On GNU libc systems, print a crude backtrace to the verbose log. * On other systems, print "no backtrace support" @@ -3129,425 +3012,6 @@ _dbus_print_backtrace (void) _dbus_verbose (" D-BUS not compiled with backtrace support\n"); #endif } - -/** - * Does the chdir, fork, setsid, etc. to become a daemon process. - * - * @param pidfile #NULL, or pidfile to create - * @param print_pid_fd file descriptor to print pid to, or -1 for none - * @param error return location for errors - * @returns #FALSE on failure - */ -dbus_bool_t -_dbus_become_daemon (const DBusString *pidfile, - int print_pid_fd, - DBusError *error) -{ - 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"); - } - - /* Get a predictable umask */ - _dbus_verbose ("setting umask\n"); - umask (022); - break; - - default: - if (pidfile) - { - _dbus_verbose ("parent writing pid file\n"); - if (!_dbus_write_pid_file (pidfile, - child_pid, - error)) - { - _dbus_verbose ("pid file write failed, killing child\n"); - kill (child_pid, SIGTERM); - return FALSE; - } - } - - /* Write PID if requested */ - if (print_pid_fd >= 0) - { - DBusString pid; - int bytes; - - if (!_dbus_string_init (&pid)) - { - _DBUS_SET_OOM (error); - kill (child_pid, SIGTERM); - return FALSE; - } - - if (!_dbus_string_append_int (&pid, _dbus_getpid ()) || - !_dbus_string_append (&pid, "\n")) - { - _dbus_string_free (&pid); - _DBUS_SET_OOM (error); - kill (child_pid, SIGTERM); - return FALSE; - } - - bytes = _dbus_string_get_length (&pid); - if (_dbus_write (print_pid_fd, &pid, 0, bytes) != bytes) - { - dbus_set_error (error, DBUS_ERROR_FAILED, - "Printing message bus PID: %s\n", - _dbus_strerror (errno)); - _dbus_string_free (&pid); - kill (child_pid, SIGTERM); - return FALSE; - } - - _dbus_string_free (&pid); - } - _dbus_verbose ("parent exiting\n"); - _exit (0); - break; - } - - _dbus_verbose ("calling setsid()\n"); - if (setsid () == -1) - _dbus_assert_not_reached ("setsid() failed"); - - 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 - */ -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)); - close (fd); - 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)); - 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; -} - -/** - * Changes the user and group the bus is running as. - * - * @param uid the new user ID - * @param gid the new group ID - * @param error return location for errors - * @returns #FALSE on failure - */ -dbus_bool_t -_dbus_change_identity (dbus_uid_t uid, - dbus_gid_t gid, - DBusError *error) -{ - /* 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. - * FIXME 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; -} - -/** 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, 0); -} - -/** 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 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_DIR)) - { - _DBUS_SET_OOM (error); - goto out; - } - - - if (!_dbus_string_append (&f, username)) - { - _DBUS_SET_OOM (error); - goto out; - } - - result = _dbus_file_exists (_dbus_string_get_const_data (&f)); - - out: - _dbus_string_free (&f); - - return result; -} - -#ifdef DBUS_BUILD_TESTS -#include <stdlib.h> -static void -check_dirname (const char *filename, - const char *dirname) -{ - DBusString f, d; - - _dbus_string_init_const (&f, filename); - - if (!_dbus_string_init (&d)) - _dbus_assert_not_reached ("no memory"); - - if (!_dbus_string_get_dirname (&f, &d)) - _dbus_assert_not_reached ("no memory"); - - if (!_dbus_string_equal_c_str (&d, dirname)) - { - _dbus_warn ("For filename \"%s\" got dirname \"%s\" and expected \"%s\"\n", - filename, - _dbus_string_get_const_data (&d), - dirname); - exit (1); - } - - _dbus_string_free (&d); -} - -static void -check_path_absolute (const char *path, - dbus_bool_t expected) -{ - DBusString p; - - _dbus_string_init_const (&p, path); - - if (_dbus_path_is_absolute (&p) != expected) - { - _dbus_warn ("For path \"%s\" expected absolute = %d got %d\n", - path, expected, _dbus_path_is_absolute (&p)); - exit (1); - } -} - -/** - * Unit test for dbus-sysdeps.c. - * - * @returns #TRUE on success. - */ -dbus_bool_t -_dbus_sysdeps_test (void) -{ - DBusString str; - double val; - int pos; - - check_dirname ("foo", "."); - check_dirname ("foo/bar", "foo"); - check_dirname ("foo//bar", "foo"); - check_dirname ("foo///bar", "foo"); - check_dirname ("foo/bar/", "foo"); - check_dirname ("foo//bar/", "foo"); - check_dirname ("foo///bar/", "foo"); - check_dirname ("foo/bar//", "foo"); - check_dirname ("foo//bar////", "foo"); - check_dirname ("foo///bar///////", "foo"); - check_dirname ("/foo", "/"); - check_dirname ("////foo", "/"); - check_dirname ("/foo/bar", "/foo"); - check_dirname ("/foo//bar", "/foo"); - check_dirname ("/foo///bar", "/foo"); - check_dirname ("/", "/"); - check_dirname ("///", "/"); - check_dirname ("", "."); - - - _dbus_string_init_const (&str, "3.5"); - if (!_dbus_string_parse_double (&str, - 0, &val, &pos)) - { - _dbus_warn ("Failed to parse double"); - exit (1); - } - if (ABS(3.5 - val) > 1e-6) - { - _dbus_warn ("Failed to parse 3.5 correctly, got: %f", val); - exit (1); - } - if (pos != 3) - { - _dbus_warn ("_dbus_string_parse_double of \"3.5\" returned wrong position %d", pos); - exit (1); - } - - _dbus_string_init_const (&str, "0xff"); - if (!_dbus_string_parse_double (&str, - 0, &val, &pos)) - { - _dbus_warn ("Failed to parse double"); - exit (1); - } - if (ABS (0xff - val) > 1e-6) - { - _dbus_warn ("Failed to parse 0xff correctly, got: %f\n", val); - exit (1); - } - if (pos != 4) - { - _dbus_warn ("_dbus_string_parse_double of \"0xff\" returned wrong position %d", pos); - exit (1); - } - - check_path_absolute ("/", TRUE); - check_path_absolute ("/foo", TRUE); - check_path_absolute ("", FALSE); - check_path_absolute ("foo", FALSE); - check_path_absolute ("foo/bar", FALSE); - - return TRUE; -} -#endif /* DBUS_BUILD_TESTS */ +#endif /* asserts or tests enabled */ /** @} end of sysdeps */ - |