Function

GLibspawn_sync

Declaration 

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* wait_status,
  GError** error
)

Description

Executes a child synchronously (waits for the child to exit before returning).

All output from the child is stored in standard_output and standard_error, if those parameters are non-NULL. Note that you must set the G_SPAWN_STDOUT_TO_DEV_NULL and G_SPAWN_STDERR_TO_DEV_NULL flags when passing NULL for standard_output and standard_error.

If wait_status is non-NULL, the platform-specific status of the child is stored there; see the documentation of g_spawn_check_wait_status() for how to use and interpret this. On Unix platforms, note that it is usually not equal to the integer passed to exit() or returned from main().

Note that it is invalid to pass G_SPAWN_DO_NOT_REAP_CHILD in flags, and on POSIX platforms, the same restrictions as for g_child_watch_source_new() apply.

If an error occurs, no data is returned in standard_output, standard_error, or wait_status.

This function calls g_spawn_async_with_pipes() internally; see that function for full details on the other parameters and details on how these functions work on Windows.

Parameters

working_directory

Type: const gchar*

Child’s current working directory, or NULL to inherit parent’s.

The argument can be NULL.
The data is owned by the caller of the function.
The value is a file system path, using the OS encoding.
argv

Type: An array of filename

child's argument vector, which must be non-empty and `NULL`-terminated.

The array must be NULL-terminated.
The data is owned by the caller of the function.
Each element is a file system path, using the OS encoding.
envp

Type: An array of filename

child's environment, or `NULL` to inherit parent's.

The argument can be NULL.
The array must be NULL-terminated.
The data is owned by the caller of the function.
Each element is a file system path, using the OS encoding.
flags

Type: GSpawnFlags

Flags from GSpawnFlags.

child_setup

Type: GSpawnChildSetupFunc

Function to run in the child just before exec()

The argument can be NULL.
user_data

Type: gpointer

User data for child_setup.

The argument can be NULL.
The data is owned by the caller of the function.
standard_output

Type: An array of guint8

Return location for child output, or NULL.

The argument will be set by the function.
The argument can be NULL.
The array must be NULL-terminated.
The called function takes ownership of the data, and is responsible for freeing it.
standard_error

Type: An array of guint8

Return location for child error messages, or NULL.

The argument will be set by the function.
The argument can be NULL.
The array must be NULL-terminated.
The called function takes ownership of the data, and is responsible for freeing it.
wait_status

Type: gint*

Return location for child wait status, as returned by waitpid(), or NULL.

The argument will be set by the function.
The argument can be NULL.
error

Type: GError **

The return location for a recoverable error.

The argument can be NULL.
If the return location is not NULL, then you must initialize it to a NULL GError*.
The argument will left initialized to NULL by the function if there are no errors.
In case of error, the argument will be set to a newly allocated GError; the caller will take ownership of the data, and be responsible for freeing it.

Return value

Type: gboolean

TRUE on success, FALSE if an error was set.