_spawnl, _wspawnl (original) (raw)

Creates and executes a new process.

Syntax

intptr_t _spawnl(
   int mode,
   const char *cmdname,
   const char *arg0,
   const char *arg1,
   ... const char *argn,
   NULL
);
intptr_t _wspawnl(
   int mode,
   const wchar_t *cmdname,
   const wchar_t *arg0,
   const wchar_t *arg1,
   ... const wchar_t *argn,
   NULL
);

Parameters

mode
Execution mode for the calling process.

cmdname
Path of the file to be executed.

arg0, arg1, ... argN
List of pointers to arguments. The arg0 argument is usually a pointer to cmdname. The arguments arg1 through argN are pointers to the character strings forming the new argument list. Following argN, there must be a NULL pointer to mark the end of the argument list.

Return value

The return value from a synchronous _spawnl or _wspawnl (_P_WAIT specified for mode) is the exit status of the new process. The return value from an asynchronous _spawnl or _wspawnl (_P_NOWAIT or _P_NOWAITO specified for mode) is the process handle. The exit status is 0 if the process terminated normally. You can set the exit status to a nonzero value if the spawned process specifically calls the exit routine with a nonzero argument. If the new process didn't explicitly set a positive exit status, a positive exit status indicates an abnormal exit with an abort or an interrupt. A return value of -1 indicates an error (the new process isn't started). In this case, errno is set to one of the following values.

Value	Description
E2BIG	Argument list exceeds 1024 bytes.
EINVAL	mode argument is invalid.
ENOENT	File or path isn't found.
ENOEXEC	Specified file isn't executable or has invalid executable-file format.
ENOMEM	Not enough memory is available to execute the new process.

For more information about these and other return codes, see errno, _doserrno, _sys_errlist, and _sys_nerr.

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

Each of these functions creates and executes a new process, passing each command-line argument as a separate parameter.

Requirements

Routine	Required header
_spawnl	<process.h>
_wspawnl	<stdio.h> or <wchar.h>

For more compatibility information, see Compatibility.

Example