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_spawnve, _wspawnve

Creates and executes a new process.


intptr_t _spawnve(
   int mode,
      const char *cmdname,
   const char *const *argv,
   const char *const *envp 
);
intptr_t _wspawnve(
   int mode,
   const wchar_t *cmdname,
   const wchar_t *const *argv,
   const wchar_t *const *envp 
);

Parameters

mode

Execution mode for a calling process.

cmdname

Path of the file to be executed.

argv

Array of pointers to arguments.

envp

Array of pointers to environment settings.

The return value from a synchronous _spawnve or _wspawnve (_P_WAIT specified for mode) is the exit status of the new process. The return value from an asynchronous _spawnve or _wspawnve (_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 did not 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 is not started). In this case, errno is set to one of the following values.

E2BIG

Argument list exceeds 1024 bytes.

EINVAL

mode argument is invalid.

ENOENT

File or path is not found.

ENOEXEC

Specified file is not 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 _doserrno, errno, _sys_errlist, and _sys_nerr.

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 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.

Routine Required header Compatibility

_spawnve

<stdio.h> or <process.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

_wspawnve

<stdio.h> or <wchar.h>

Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

For more compatibility information, see Compatibility in the Introduction.

See the example in _spawn, _wspawn Functions.

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