_execlp
, _wexeclp
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 _execlp(
const char *cmdname,
const char *arg0,
... const char *argn,
NULL
);
intptr_t _wexeclp(
const wchar_t *cmdname,
const wchar_t *arg0,
... const wchar_t *argn,
NULL
);
Parameters
cmdname
Path of the file to execute.
arg0
, ... argN
List of pointers to 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. |
EMFILE |
Too many files open (the specified file must be opened to determine whether it's executable). |
ENOENT |
The file or path not 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. |
For more information about these and other return codes, see errno
, _doserrno
, _sys_errlist
, and _sys_nerr
.
Remarks
Each of these functions loads and executes a new process, passing each command-line argument as a separate parameter and using the PATH
environment variable to find the file to execute.
The _execlp
functions validate their parameters. If 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 launched.
Requirements
Function | Required header | Optional header |
---|---|---|
_execlp |
<process.h> | <errno.h> |
_wexeclp |
<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