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/* gspawn.h - Process launching * * Copyright 2000 Red Hat, Inc. * * 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/>. */ #ifndef __G_SPAWN_H__ #define __G_SPAWN_H__ #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) #error "Only <glib.h> can be included directly." #endif #include <glib/gerror.h> G_BEGIN_DECLS /* I'm not sure I remember our proposed naming convention here. */ /** * G_SPAWN_ERROR: * * Error domain for spawning processes. Errors in this domain will * be from the #GSpawnError enumeration. See #GError for information on * error domains. */ #define G_SPAWN_ERROR g_spawn_error_quark () /** * GSpawnError: * @G_SPAWN_ERROR_FORK: Fork failed due to lack of memory. * @G_SPAWN_ERROR_READ: Read or select on pipes failed. * @G_SPAWN_ERROR_CHDIR: Changing to working directory failed. * @G_SPAWN_ERROR_ACCES: execv() returned `EACCES` * @G_SPAWN_ERROR_PERM: execv() returned `EPERM` * @G_SPAWN_ERROR_TOO_BIG: execv() returned `E2BIG` * @G_SPAWN_ERROR_2BIG: deprecated alias for %G_SPAWN_ERROR_TOO_BIG * @G_SPAWN_ERROR_NOEXEC: execv() returned `ENOEXEC` * @G_SPAWN_ERROR_NAMETOOLONG: execv() returned `ENAMETOOLONG` * @G_SPAWN_ERROR_NOENT: execv() returned `ENOENT` * @G_SPAWN_ERROR_NOMEM: execv() returned `ENOMEM` * @G_SPAWN_ERROR_NOTDIR: execv() returned `ENOTDIR` * @G_SPAWN_ERROR_LOOP: execv() returned `ELOOP` * @G_SPAWN_ERROR_TXTBUSY: execv() returned `ETXTBUSY` * @G_SPAWN_ERROR_IO: execv() returned `EIO` * @G_SPAWN_ERROR_NFILE: execv() returned `ENFILE` * @G_SPAWN_ERROR_MFILE: execv() returned `EMFILE` * @G_SPAWN_ERROR_INVAL: execv() returned `EINVAL` * @G_SPAWN_ERROR_ISDIR: execv() returned `EISDIR` * @G_SPAWN_ERROR_LIBBAD: execv() returned `ELIBBAD` * @G_SPAWN_ERROR_FAILED: Some other fatal failure, * `error->message` should explain. * * Error codes returned by spawning processes. */ typedef enum { G_SPAWN_ERROR_FORK, /* fork failed due to lack of memory */ G_SPAWN_ERROR_READ, /* read or select on pipes failed */ G_SPAWN_ERROR_CHDIR, /* changing to working dir failed */ G_SPAWN_ERROR_ACCES, /* execv() returned EACCES */ G_SPAWN_ERROR_PERM, /* execv() returned EPERM */ G_SPAWN_ERROR_TOO_BIG,/* execv() returned E2BIG */ #ifndef G_DISABLE_DEPRECATED G_SPAWN_ERROR_2BIG = G_SPAWN_ERROR_TOO_BIG, #endif G_SPAWN_ERROR_NOEXEC, /* execv() returned ENOEXEC */ G_SPAWN_ERROR_NAMETOOLONG, /* "" "" ENAMETOOLONG */ G_SPAWN_ERROR_NOENT, /* "" "" ENOENT */ G_SPAWN_ERROR_NOMEM, /* "" "" ENOMEM */ G_SPAWN_ERROR_NOTDIR, /* "" "" ENOTDIR */ G_SPAWN_ERROR_LOOP, /* "" "" ELOOP */ G_SPAWN_ERROR_TXTBUSY, /* "" "" ETXTBUSY */ G_SPAWN_ERROR_IO, /* "" "" EIO */ G_SPAWN_ERROR_NFILE, /* "" "" ENFILE */ G_SPAWN_ERROR_MFILE, /* "" "" EMFLE */ G_SPAWN_ERROR_INVAL, /* "" "" EINVAL */ G_SPAWN_ERROR_ISDIR, /* "" "" EISDIR */ G_SPAWN_ERROR_LIBBAD, /* "" "" ELIBBAD */ G_SPAWN_ERROR_FAILED /* other fatal failure, error->message * should explain */ } GSpawnError; /** * G_SPAWN_EXIT_ERROR: * * Error domain used by g_spawn_check_exit_status(). The code * will be the program exit code. */ #define G_SPAWN_EXIT_ERROR g_spawn_exit_error_quark () /** * GSpawnChildSetupFunc: * @user_data: (closure): user data to pass to the function. * * Specifies the type of the setup function passed to g_spawn_async(), * g_spawn_sync() and g_spawn_async_with_pipes(), which can, in very * limited ways, be used to affect the child's execution. * * On POSIX platforms, the function is called in the child after GLib * has performed all the setup it plans to perform, but before calling * exec(). Actions taken in this function will only affect the child, * not the parent. * * On Windows, the function is called in the parent. Its usefulness on * Windows is thus questionable. In many cases executing the child setup * function in the parent can have ill effects, and you should be very * careful when porting software to Windows that uses child setup * functions. * * However, even on POSIX, you are extremely limited in what you can * safely do from a #GSpawnChildSetupFunc, because any mutexes that were * held by other threads in the parent process at the time of the fork() * will still be locked in the child process, and they will never be * unlocked (since the threads that held them don't exist in the child). * POSIX allows only async-signal-safe functions (see signal(7)) to be * called in the child between fork() and exec(), which drastically limits * the usefulness of child setup functions. * * In particular, it is not safe to call any function which may * call malloc(), which includes POSIX functions such as setenv(). * If you need to set up the child environment differently from * the parent, you should use g_get_environ(), g_environ_setenv(), * and g_environ_unsetenv(), and then pass the complete environment * list to the `g_spawn...` function. */ typedef void (* GSpawnChildSetupFunc) (gpointer user_data); /** * GSpawnFlags: * @G_SPAWN_DEFAULT: no flags, default behaviour * @G_SPAWN_LEAVE_DESCRIPTORS_OPEN: the parent's open file descriptors will * be inherited by the child; otherwise all descriptors except stdin, * stdout and stderr will be closed before calling exec() in the child. * @G_SPAWN_DO_NOT_REAP_CHILD: the child will not be automatically reaped; * you must use g_child_watch_add() yourself (or call waitpid() or handle * `SIGCHLD` yourself), or the child will become a zombie. * @G_SPAWN_SEARCH_PATH: `argv[0]` need not be an absolute path, it will be * looked for in the user's `PATH`. * @G_SPAWN_STDOUT_TO_DEV_NULL: the child's standard output will be discarded, * instead of going to the same location as the parent's standard output. * @G_SPAWN_STDERR_TO_DEV_NULL: the child's standard error will be discarded. * @G_SPAWN_CHILD_INHERITS_STDIN: the child will inherit the parent's standard * input (by default, the child's standard input is attached to `/dev/null`). * @G_SPAWN_FILE_AND_ARGV_ZERO: the first element of `argv` is the file to * execute, while the remaining elements are the actual argument vector * to pass to the file. Normally g_spawn_async_with_pipes() uses `argv[0]` * as the file to execute, and passes all of `argv` to the child. * @G_SPAWN_SEARCH_PATH_FROM_ENVP: if `argv[0]` is not an abolute path, * it will be looked for in the `PATH` from the passed child environment. * Since: 2.34 * @G_SPAWN_CLOEXEC_PIPES: create all pipes with the `O_CLOEXEC` flag set. * Since: 2.40 * * Flags passed to g_spawn_sync(), g_spawn_async() and g_spawn_async_with_pipes(). */ typedef enum { G_SPAWN_DEFAULT = 0, G_SPAWN_LEAVE_DESCRIPTORS_OPEN = 1 << 0, G_SPAWN_DO_NOT_REAP_CHILD = 1 << 1, /* look for argv[0] in the path i.e. use execvp() */ G_SPAWN_SEARCH_PATH = 1 << 2, /* Dump output to /dev/null */ G_SPAWN_STDOUT_TO_DEV_NULL = 1 << 3, G_SPAWN_STDERR_TO_DEV_NULL = 1 << 4, G_SPAWN_CHILD_INHERITS_STDIN = 1 << 5, G_SPAWN_FILE_AND_ARGV_ZERO = 1 << 6, G_SPAWN_SEARCH_PATH_FROM_ENVP = 1 << 7, G_SPAWN_CLOEXEC_PIPES = 1 << 8 } GSpawnFlags; GLIB_AVAILABLE_IN_ALL GQuark g_spawn_error_quark (void); GLIB_AVAILABLE_IN_ALL GQuark g_spawn_exit_error_quark (void); GLIB_AVAILABLE_IN_ALL gboolean g_spawn_async (const gchar *working_directory, gchar **argv, gchar **envp, GSpawnFlags flags, GSpawnChildSetupFunc child_setup, gpointer user_data, GPid *child_pid, GError **error); /* Opens pipes for non-NULL standard_output, standard_input, standard_error, * and returns the parent's end of the pipes. */ GLIB_AVAILABLE_IN_ALL gboolean g_spawn_async_with_pipes (const gchar *working_directory, gchar **argv, gchar **envp, GSpawnFlags flags, GSpawnChildSetupFunc child_setup, gpointer user_data, GPid *child_pid, gint *standard_input, gint *standard_output, gint *standard_error, GError **error); /* If standard_output or standard_error are non-NULL, the full * standard output or error of the command will be placed there. */ GLIB_AVAILABLE_IN_ALL gboolean g_spawn_sync (const gchar *working_directory, gchar **argv, gchar **envp, GSpawnFlags flags, GSpawnChildSetupFunc child_setup, gpointer user_data, gchar **standard_output, gchar **standard_error, gint *exit_status, GError **error); GLIB_AVAILABLE_IN_ALL gboolean g_spawn_command_line_sync (const gchar *command_line, gchar **standard_output, gchar **standard_error, gint *exit_status, GError **error); GLIB_AVAILABLE_IN_ALL gboolean g_spawn_command_line_async (const gchar *command_line, GError **error); GLIB_AVAILABLE_IN_2_34 gboolean g_spawn_check_exit_status (gint exit_status, GError **error); GLIB_AVAILABLE_IN_ALL void g_spawn_close_pid (GPid pid); G_END_DECLS #endif /* __G_SPAWN_H__ */