_spawnvpe, _wspawnvpe

Creates and executes a new process.

Syntax

intptr_t _spawnvpe(
   int mode,
   const char *cmdname,
   const char *const *argv,
   const char *const *envp
);
intptr_t _wspawnvpe(
   int mode,
   const wchar_t *cmdname,
   const wchar_t *const *argv,
   const wchar_t *const *envp
);

Parameters

mode
Execution mode for calling process

cmdname
Path of file to be executed

argv
Array of pointers to arguments. The argument argv[0] is usually a pointer to a path in real mode or to the program name in protected mode, and argv[1] through argv[n] are pointers to the character strings forming the new argument list. The argument argv[n+1] must be a NULL pointer to mark the end of the argument list.

envp
Array of pointers to environment settings

Return value

The return value from a synchronous _spawnvpe or _wspawnvpe (_P_WAIT specified for mode) is the exit status of the new process. The return value from an asynchronous _spawnvpe or _wspawnvpe (_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:

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

Remarks

Each of these functions creates and executes a new process, passing an array of pointers to command-line arguments and an array of pointers to environment settings. These functions use the PATH environment variable to find the file to execute.

These functions validate their parameters. If either cmdname or argv is a null pointer, or if argv points to null pointer, or argv[0] is an empty string, 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.

By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.

Requirements

For more compatibility information, see Compatibility.

Example

See the example in _spawn, _wspawn functions.

See also

abort
atexit
_exec, _wexec functions
exit, _Exit, _exit
_flushall
_getmbcp
_onexit, _onexit_m
_setmbcp
system, _wsystem