_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.
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
);
cmdname
Path of the file to be executed.
arg0
, ... argN
List of pointers to the parameters.
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. |
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.
Function | Required header | Optional header |
---|---|---|
_execl |
<process.h> | <errno.h> |
_wexecl |
<process.h> or <wchar.h> | <errno.h> |
For more compatibility information, see Compatibility.
See the example in _exec
, _wexec
functions.
Process and environment control
_exec
, _wexec
functions
abort
atexit
exit
, _Exit
, _exit
_onexit
, _onexit_m
_spawn
, _wspawn
functions
system
, _wsystem