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/*
* Copyright 2021 Collabora Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stdio.h>
#include <glib.h>
#ifdef G_OS_UNIX
#include <sys/types.h>
#include <sys/wait.h>
#endif
static void
child_setup (gpointer user_data)
{
}
typedef struct
{
int wait_status;
gboolean done;
} ChildStatus;
static ChildStatus child_status = { -1, FALSE };
static void
child_watch_cb (GPid pid,
gint status,
gpointer user_data)
{
child_status.wait_status = status;
child_status.done = TRUE;
}
int
main (int argc,
char **argv)
{
gboolean search_path = FALSE;
gboolean search_path_from_envp = FALSE;
gboolean slow_path = FALSE;
gboolean unset_path_in_envp = FALSE;
gchar *chdir_child = NULL;
gchar *set_path_in_envp = NULL;
gchar **envp = NULL;
GOptionEntry entries[] =
{
{ "chdir-child", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_FILENAME, &chdir_child,
"Run PROGRAM in this working directory", NULL },
{ "search-path", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &search_path,
"Search PATH for PROGRAM", NULL },
{ "search-path-from-envp", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &search_path_from_envp,
"Search PATH from specified environment", NULL },
{ "set-path-in-envp", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_FILENAME, &set_path_in_envp,
"Set PATH in specified environment to this value", "PATH", },
{ "unset-path-in-envp", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &unset_path_in_envp,
"Unset PATH in specified environment", NULL },
{ "slow-path", '\0',
G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &slow_path,
"Use a child-setup function to avoid the posix_spawn fast path", NULL },
{ NULL }
};
GError *error = NULL;
int ret = 1;
GSpawnFlags spawn_flags = G_SPAWN_DO_NOT_REAP_CHILD;
GPid pid;
GOptionContext *context = NULL;
context = g_option_context_new ("PROGRAM [ARGS...]");
g_option_context_add_main_entries (context, entries, NULL);
if (!g_option_context_parse (context, &argc, &argv, &error))
{
ret = 2;
goto out;
}
if (argc < 2)
{
g_set_error (&error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
"Usage: %s [OPTIONS] PROGRAM [ARGS...]", argv[0]);
ret = 2;
goto out;
}
envp = g_get_environ ();
if (set_path_in_envp != NULL && unset_path_in_envp)
{
g_set_error (&error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED,
"Cannot both set PATH and unset it");
ret = 2;
goto out;
}
if (set_path_in_envp != NULL)
envp = g_environ_setenv (envp, "PATH", set_path_in_envp, TRUE);
if (unset_path_in_envp)
envp = g_environ_unsetenv (envp, "PATH");
if (search_path)
spawn_flags |= G_SPAWN_SEARCH_PATH;
if (search_path_from_envp)
spawn_flags |= G_SPAWN_SEARCH_PATH_FROM_ENVP;
if (!g_spawn_async_with_pipes (chdir_child,
&argv[1],
envp,
spawn_flags,
slow_path ? child_setup : NULL,
NULL, /* user_data */
&pid,
NULL, /* stdin */
NULL, /* stdout */
NULL, /* stderr */
&error))
{
ret = 1;
goto out;
}
g_child_watch_add (pid, child_watch_cb, NULL);
while (!child_status.done)
g_main_context_iteration (NULL, TRUE);
g_spawn_close_pid (pid);
#ifdef G_OS_UNIX
if (WIFEXITED (child_status.wait_status))
ret = WEXITSTATUS (child_status.wait_status);
else
ret = 1;
#else
ret = child_status.wait_status;
#endif
out:
if (error != NULL)
fprintf (stderr, "%s\n", error->message);
g_free (set_path_in_envp);
g_free (chdir_child);
g_clear_error (&error);
g_strfreev (envp);
g_option_context_free (context);
return ret;
}
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