execl-wexecl.md

description	title	ms.date	api_name	api_location	api_type	topic_type	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: _execl, _wexecl	_execl, _wexecl	11/04/2016	_execl _wexecl	msvcrt.dll msvcr80.dll msvcr90.dll msvcr100.dll msvcr100_clr0400.dll msvcr110.dll msvcr110_clr0400.dll msvcr120.dll msvcr120_clr0400.dll ucrtbase.dll api-ms-win-crt-process-l1-1-0.dll	DLLExport	apiref	_execl _wexecl wexecl	_execl function wexecl function _wexecl function execl function	81fefb8a-0a06-4221-b2bc-be18e38e89f4

_execl, _wexecl

Loads and executes new child processes.

Important

This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported in Universal Windows Platform apps.

Syntax

intptr_t _execl(
   const char *cmdname,
   const char *arg0,
   ... const char *argn,
   NULL
);
intptr_t _wexecl(
   const wchar_t *cmdname,
   const wchar_t *arg0,
   ... const wchar_t *argn,
   NULL
);

Parameters

cmdname
Path of the file to be executed.

arg0, ... argN
List of pointers to the parameters.

Return value

If successful, these functions don't return to the calling process. A return value of -1 indicates an error, in which case the errno global variable is set.

errno value	Description
E2BIG	The space required for the arguments and environment settings exceeds 32 KB.
EACCES	The specified file has a locking or sharing violation.
EINVAL	Invalid parameter (one or more of the parameters was a null pointer or empty string).
EMFILE	Too many files open (the specified file must be opened to determine whether it's executable).
ENOENT	The file or path isn't found.
ENOEXEC	The specified file isn't executable or has an invalid executable-file format.
ENOMEM	Not enough memory is available to execute the new process; the available memory has been corrupted; or an invalid block exists, indicating that the calling process wasn't allocated properly.

Remarks

Each of these functions loads and executes a new process, passing each command-line argument as a separate parameter. The first argument is the command or executable file name, and the second argument should be the same as the first. It becomes argv[0] in the executed process. The third argument is the first argument, argv[1], of the process being executed.

The _execl functions validate their parameters. If either cmdname or arg0 is a null pointer or empty string, these functions invoke the invalid parameter handler as described in Parameter validation If execution is allowed to continue, these functions set errno to EINVAL and return -1. No new process is executed.

Requirements

Function	Required header	Optional header
_execl	<process.h>	<errno.h>
_wexecl	<process.h> or <wchar.h>	<errno.h>

For more compatibility information, see Compatibility.

Example

See the example in _exec, _wexec functions.

See also

Process and environment control
_exec, _wexec functions
abort
atexit
exit, _Exit, _exit
_onexit, _onexit_m
_spawn, _wspawn functions
system, _wsystem