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Merge branch 'empty-argv' into 'main'

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Various minor fixes for empty argv handling

See merge request GNOME/glib!2466
This commit is contained in:
Philip Withnall 2022-02-20 09:36:41 +00:00
commit cb18e6b969
14 changed files with 120 additions and 25 deletions
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8
gio/gapplicationcommandline.c
View File

@ -106,7 +106,7 @@
* The complete example can be found here:
* [gapplication-example-cmdline.c](https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/tests/gapplication-example-cmdline.c)
*
* In more complicated cases, the handling of the comandline can be
* In more complicated cases, the handling of the commandline can be
* split between the launcher and the primary instance.
* |[<!-- language="C" -->
* static gboolean
@ -119,6 +119,12 @@
*
* argv = *arguments;
*
* if (argv[0] == NULL)
* {
* *exit_status = 0;
* return FALSE;
* }
*
* i = 1;
* while (argv[i])
* {

3
gio/gdbus-tool.c
View File

@ -107,7 +107,7 @@ usage (gint *argc, gchar **argv[], gboolean use_stdout)
g_option_context_set_help_enabled (o, FALSE);
/* Ignore parsing result */
g_option_context_parse (o, argc, argv, NULL);
program_name = g_path_get_basename ((*argv)[0]);
program_name = (*argc > 0) ? g_path_get_basename ((*argv)[0]) : g_strdup ("gdbus-tool");
s = g_strdup_printf (_("Commands:\n"
" help Shows this information\n"
" introspect Introspect a remote object\n"
@ -141,6 +141,7 @@ modify_argv0_for_command (gint *argc, gchar **argv[], const gchar *command)
* 2. save old argv[0] and restore later
*/
g_assert (*argc > 1);
g_assert (g_strcmp0 ((*argv)[1], command) == 0);
remove_arg (1, argc, argv);

4
gio/gdesktopappinfo.c
View File

@ -1880,6 +1880,10 @@ g_desktop_app_info_load_from_keyfile (GDesktopAppInfo *info,
else
{
char *t;
/* Since @exec is not an empty string, there must be at least one
* argument, so dereferencing argv[0] should return non-NULL. */
g_assert (argc > 0);
t = g_find_program_in_path (argv[0]);
g_strfreev (argv);

2
gio/gio-querymodules.c
View File

@ -161,7 +161,7 @@ main (gint argc,
{
int i;
if (argc == 1)
if (argc <= 1)
{
g_print ("Usage: gio-querymodules <directory1> [<directory2> ...]\n");
g_print ("Will update giomodule.cache in the listed directories\n");

3
glib/deprecated/gcompletion.c
View File

@ -463,7 +463,8 @@ main (int argc,
if (argc < 3)
{
g_warning ("Usage: %s filename prefix1 [prefix2 ...]", argv[0]);
g_warning ("Usage: %s filename prefix1 [prefix2 ...]",
(argc > 0) ? argv[0] : "gcompletion");
return 1;
}

10
glib/gshell.c
View File

@ -646,6 +646,11 @@ tokenize_command_line (const gchar *command_line,
*
* Possible errors are those from the %G_SHELL_ERROR domain.
*
* In particular, if @command_line is an empty string (or a string containing
* only whitespace), %G_SHELL_ERROR_EMPTY_STRING will be returned. It’s
* guaranteed that @argvp will be a non-empty array if this function returns
* successfully.
*
* Free the returned vector with g_strfreev().
*
* Returns: %TRUE on success, %FALSE if error set
@ -702,7 +707,10 @@ g_shell_parse_argv (const gchar *command_line,
}
g_slist_free_full (tokens, g_free);
g_assert (argc > 0);
g_assert (argv != NULL && argv[0] != NULL);
if (argcp)
*argcp = argc;

15
glib/gspawn-win32.c
View File

@ -236,7 +236,7 @@ g_spawn_async (const gchar *working_directory,
GPid *child_pid,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv != NULL && argv[0] != NULL, FALSE);
return g_spawn_async_with_pipes (working_directory,
argv, envp,
@ -460,6 +460,8 @@ do_spawn_directly (gint *exit_status,
gint conv_error_index;
wchar_t *wargv0, **wargv, **wenvp;
g_assert (argv != NULL && argv[0] != NULL);
new_argv = (flags & G_SPAWN_FILE_AND_ARGV_ZERO) ? protected_argv + 1 : protected_argv;
wargv0 = g_utf8_to_utf16 (argv[0], -1, NULL, NULL, &conv_error);
@ -601,6 +603,7 @@ fork_exec (gint *exit_status,
int stdout_pipe[2] = { -1, -1 };
int stderr_pipe[2] = { -1, -1 };
g_assert (argv != NULL && argv[0] != NULL);
g_assert (stdin_pipe_out == NULL || stdin_fd < 0);
g_assert (stdout_pipe_out == NULL || stdout_fd < 0);
g_assert (stderr_pipe_out == NULL || stderr_fd < 0);
@ -989,7 +992,7 @@ g_spawn_sync (const gchar *working_directory,
gboolean failed;
gint status;
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv != NULL && argv[0] != NULL, FALSE);
g_return_val_if_fail (!(flags & G_SPAWN_DO_NOT_REAP_CHILD), FALSE);
g_return_val_if_fail (standard_output == NULL ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
@ -1221,7 +1224,7 @@ g_spawn_async_with_pipes (const gchar *working_directory,
gint *standard_error,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv != NULL && argv[0] != NULL, FALSE);
g_return_val_if_fail (standard_output == NULL ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
g_return_val_if_fail (standard_error == NULL ||
@ -1263,7 +1266,7 @@ g_spawn_async_with_fds (const gchar *working_directory,
gint stderr_fd,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv != NULL && argv[0] != NULL, FALSE);
g_return_val_if_fail (stdin_fd == -1 ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
g_return_val_if_fail (stderr_fd == -1 ||
@ -1312,7 +1315,7 @@ g_spawn_async_with_pipes_and_fds (const gchar *working_directory,
gint *stderr_pipe_out,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv != NULL && argv[0] != NULL, FALSE);
g_return_val_if_fail (stdout_pipe_out == NULL ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
g_return_val_if_fail (stderr_pipe_out == NULL ||
@ -1359,6 +1362,7 @@ g_spawn_command_line_sync (const gchar *command_line,
g_return_val_if_fail (command_line != NULL, FALSE);
/* This will return a runtime error if @command_line is the empty string. */
if (!g_shell_parse_argv (command_line,
NULL, &argv,
error))
@ -1388,6 +1392,7 @@ g_spawn_command_line_async (const gchar *command_line,
g_return_val_if_fail (command_line != NULL, FALSE);
/* This will return a runtime error if @command_line is the empty string. */
if (!g_shell_parse_argv (command_line,
NULL, &argv,
error))

24
glib/gspawn.c
View File

@ -319,7 +319,7 @@ read_data (GString *str,
* @working_directory: (type filename) (nullable): child's current working
* directory, or %NULL to inherit parent's
* @argv: (array zero-terminated=1) (element-type filename):
* child's argument vector
* child's argument vector, which must be non-empty and %NULL-terminated
* @envp: (array zero-terminated=1) (element-type filename) (nullable):
* child's environment, or %NULL to inherit parent's
* @flags: flags from #GSpawnFlags
@ -378,6 +378,7 @@ g_spawn_sync (const gchar *working_directory,
gint status;
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv[0] != NULL, FALSE);
g_return_val_if_fail (!(flags & G_SPAWN_DO_NOT_REAP_CHILD), FALSE);
g_return_val_if_fail (standard_output == NULL ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
@ -578,7 +579,7 @@ g_spawn_sync (const gchar *working_directory,
* @working_directory: (type filename) (nullable): child's current working
* directory, or %NULL to inherit parent's, in the GLib file name encoding
* @argv: (array zero-terminated=1) (element-type filename): child's argument
* vector, in the GLib file name encoding
* vector, in the GLib file name encoding; it must be non-empty and %NULL-terminated
* @envp: (array zero-terminated=1) (element-type filename) (nullable):
* child's environment, or %NULL to inherit parent's, in the GLib file
* name encoding
@ -610,6 +611,7 @@ g_spawn_async_with_pipes (const gchar *working_directory,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv[0] != NULL, FALSE);
g_return_val_if_fail (standard_output == NULL ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
g_return_val_if_fail (standard_error == NULL ||
@ -646,7 +648,7 @@ g_spawn_async_with_pipes (const gchar *working_directory,
* @working_directory: (type filename) (nullable): child's current working
* directory, or %NULL to inherit parent's, in the GLib file name encoding
* @argv: (array zero-terminated=1) (element-type filename): child's argument
* vector, in the GLib file name encoding
* vector, in the GLib file name encoding; it must be non-empty and %NULL-terminated
* @envp: (array zero-terminated=1) (element-type filename) (nullable):
* child's environment, or %NULL to inherit parent's, in the GLib file
* name encoding
@ -880,6 +882,7 @@ g_spawn_async_with_pipes_and_fds (const gchar *working_directory,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv[0] != NULL, FALSE);
g_return_val_if_fail (stdout_pipe_out == NULL ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
g_return_val_if_fail (stderr_pipe_out == NULL ||
@ -922,7 +925,8 @@ g_spawn_async_with_pipes_and_fds (const gchar *working_directory,
/**
* g_spawn_async_with_fds:
* @working_directory: (type filename) (nullable): child's current working directory, or %NULL to inherit parent's, in the GLib file name encoding
* @argv: (array zero-terminated=1): child's argument vector, in the GLib file name encoding
* @argv: (array zero-terminated=1): child's argument vector, in the GLib file name encoding;
* it must be non-empty and %NULL-terminated
* @envp: (array zero-terminated=1) (nullable): child's environment, or %NULL to inherit parent's, in the GLib file name encoding
* @flags: flags from #GSpawnFlags
* @child_setup: (scope async) (nullable): function to run in the child just before exec()
@ -956,6 +960,7 @@ g_spawn_async_with_fds (const gchar *working_directory,
GError **error)
{
g_return_val_if_fail (argv != NULL, FALSE);
g_return_val_if_fail (argv[0] != NULL, FALSE);
g_return_val_if_fail (stdout_fd < 0 ||
!(flags & G_SPAWN_STDOUT_TO_DEV_NULL), FALSE);
g_return_val_if_fail (stderr_fd < 0 ||
@ -1039,6 +1044,7 @@ g_spawn_command_line_sync (const gchar *command_line,
g_return_val_if_fail (command_line != NULL, FALSE);
/* This will return a runtime error if @command_line is the empty string. */
if (!g_shell_parse_argv (command_line,
NULL, &argv,
error))
@ -1086,6 +1092,7 @@ g_spawn_command_line_async (const gchar *command_line,
g_return_val_if_fail (command_line != NULL, FALSE);
/* This will return a runtime error if @command_line is the empty string. */
if (!g_shell_parse_argv (command_line,
NULL, &argv,
error))
@ -1636,7 +1643,9 @@ enum
};
/* This function is called between fork() and exec() and hence must be
* async-signal-safe (see signal-safety(7)) until it calls exec(). */
* async-signal-safe (see signal-safety(7)) until it calls exec().
*
* All callers must guarantee that @argv and @argv[0] are non-NULL. */
static void
do_exec (gint child_err_report_fd,
gint stdin_fd,
@ -1926,6 +1935,8 @@ do_posix_spawn (const gchar * const *argv,
gsize i;
int r;
g_assert (argv != NULL && argv[0] != NULL);
if (*argv[0] == '\0')
{
/* We check the simple case first. */
@ -2176,6 +2187,7 @@ fork_exec (gboolean intermediate_child,
gint n_child_close_fds = 0;
gint *source_fds_copy = NULL;
g_assert (argv != NULL && argv[0] != NULL);
g_assert (stdin_pipe_out == NULL || stdin_fd < 0);
g_assert (stdout_pipe_out == NULL || stdout_fd < 0);
g_assert (stderr_pipe_out == NULL || stderr_fd < 0);
@ -2734,7 +2746,7 @@ g_execute (const gchar *file,
gchar *search_path_buffer,
gsize search_path_buffer_len)
{
if (*file == '\0')
if (file == NULL || *file == '\0')
{
/* We check the simple case first. */
errno = ENOENT;

4
glib/gtester.c
View File

@ -668,8 +668,8 @@ parse_args (gint *argc_p,
}
}
/* collapse argv */
e = 1;
for (i = 1; i < argc; i++)
e = 0;
for (i = 0; i < argc; i++)
if (argv[i])
{
argv[e++] = argv[i];

13
glib/gtestutils.c
View File

@ -890,7 +890,7 @@ static gboolean test_debug_log = FALSE;
static gboolean test_tap_log = TRUE; /* default to TAP as of GLib 2.62; see #1619; the non-TAP output mode is deprecated */
static gboolean test_nonfatal_assertions = FALSE;
static DestroyEntry *test_destroy_queue = NULL;
static const char *test_argv0 = NULL; /* points into global argv */
static const char *test_argv0 = NULL; /* (nullable), points into global argv */
static char *test_argv0_dirname = NULL; /* owned by GLib */
static const char *test_disted_files_dir; /* points into test_argv0_dirname or an environment variable */
static const char *test_built_files_dir; /* points into test_argv0_dirname or an environment variable */
@ -1138,7 +1138,7 @@ parse_args (gint *argc_p,
gchar **argv = *argv_p;
guint i, e;
test_argv0 = argv[0];
test_argv0 = argv[0]; /* will be NULL iff argc == 0 */
test_initial_cwd = g_get_current_dir ();
/* parse known args */
@ -1382,8 +1382,8 @@ parse_args (gint *argc_p,
test_paths = g_slist_reverse (test_paths);
/* collapse argv */
e = 1;
for (i = 1; i < argc; i++)
e = 0;
for (i = 0; i < argc; i++)
if (argv[i])
{
argv[e++] = argv[i];
@ -1732,7 +1732,7 @@ void
g_log_set_default_handler (gtest_default_log_handler, NULL);
g_test_log (G_TEST_LOG_START_BINARY, g_get_prgname(), test_run_seedstr, 0, NULL);
test_argv0_dirname = g_path_get_dirname (test_argv0);
test_argv0_dirname = (test_argv0 != NULL) ? g_path_get_dirname (test_argv0) : g_strdup (".");
/* Make sure we get the real dirname that the test was run from */
if (g_str_has_suffix (test_argv0_dirname, "/.libs"))
@ -3828,6 +3828,9 @@ g_test_trap_subprocess (const char *test_path,
test_trap_clear ();
test_trap_last_subprocess = g_strdup (test_path);
if (test_argv0 == NULL)
g_error ("g_test_trap_subprocess() requires argv0 to be passed to g_test_init()");
argv = g_ptr_array_new ();
g_ptr_array_add (argv, (char *) test_argv0);
g_ptr_array_add (argv, "-q");

18
glib/tests/testing-helper.c
View File

@ -102,6 +102,24 @@ main (int argc,
argc -= 1;
argv[argc] = NULL;
if (g_strcmp0 (argv1, "init-null-argv0") == 0)
{
int test_argc = 0;
char *test_argva[1] = { NULL };
char **test_argv = test_argva;
/* Test that `g_test_init()` can handle being called with an empty argv
* and argc == 0. While this isn’t recommended, it is possible for another
* process to use execve() to call a gtest process this way, so we’d
* better handle it gracefully.
*
* This test can’t be run after `g_test_init()` has been called normally,
* as it isn’t allowed to be called more than once in a process. */
g_test_init (&test_argc, &test_argv, NULL);
return 0;
}
g_test_init (&argc, &argv, NULL);
g_test_set_nonfatal_assertions ();

36
glib/tests/testing.c
View File

@ -1585,6 +1585,40 @@ test_tap_summary (void)
g_ptr_array_unref (argv);
}
static void
test_init_no_argv0 (void)
{
const char *testing_helper;
GPtrArray *argv;
GError *error = NULL;
int status;
gchar *output;
g_test_summary ("Test that g_test_init() can be called safely with argc == 0.");
testing_helper = g_test_get_filename (G_TEST_BUILT, "testing-helper" EXEEXT, NULL);
argv = g_ptr_array_new ();
g_ptr_array_add (argv, (char *) testing_helper);
g_ptr_array_add (argv, "init-null-argv0");
g_ptr_array_add (argv, NULL);
/* This has to be spawned manually and can’t be run with g_test_subprocess()
* because the test helper can’t be run after `g_test_init()` has been called
* in the process. */
g_spawn_sync (NULL, (char **) argv->pdata, NULL,
G_SPAWN_STDERR_TO_DEV_NULL,
NULL, NULL, &output, NULL, &status,
&error);
g_assert_no_error (error);
g_spawn_check_wait_status (status, &error);
g_assert_no_error (error);
g_assert_nonnull (strstr (output, "# random seed:"));
g_free (output);
g_ptr_array_unref (argv);
}
int
main (int argc,
char *argv[])
@ -1682,6 +1716,8 @@ main (int argc,
g_test_add_func ("/tap", test_tap);
g_test_add_func ("/tap/summary", test_tap_summary);
g_test_add_func ("/init/no_argv0", test_init_no_argv0);
ret = g_test_run ();
/* We can't test for https://gitlab.gnome.org/GNOME/glib/-/issues/2563

3
glib/win_iconv.c
View File

@ -2034,7 +2034,8 @@ main(int argc, char **argv)
if (fromcode == NULL || tocode == NULL)
{
printf("usage: %s [-c] -f from-enc -t to-enc [file]\n", argv[0]);
printf("usage: %s [-c] -f from-enc -t to-enc [file]\n",
(argc > 0) ? argv[0] : "win_iconv");
return 0;
}

2
gobject/gobject-query.c
View File

@ -196,7 +196,7 @@ main (gint argc,
}
if (!gen_froots && !gen_tree)
return help (argv[i-1]);
return help ((argc > 0) ? argv[i-1] : NULL);
if (!indent_inc)
{