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The latest version of this topic can be found at _spawnvp, _wspawnvp.
Creates a process and executes it.
This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported with /ZW.
intptr_t _spawnvp( int mode, const char *cmdname, const char *const *argv ); intptr_t _wspawnvp( int mode, const wchar_t *cmdname, const wchar_t *const *argv );
Execution mode for calling the process.
Path of the file to be executed.
Array of pointers to arguments. The argument
argv is usually a pointer to a path in real mode or to the program name in protected mode, and
n] are pointers to the character strings that form the new argument list. The argument
n +1] must be a
NULL pointer to mark the end of the argument list.
The return value from a synchronous
_P_WAIT specified for
mode) is the exit status of the new process. The return value from an asynchronous
_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 uses a nonzero argument to call the
exit routine. 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:
Argument list exceeds 1024 bytes.
mode argument is invalid.
File or path is not found.
Specified file is not executable or has invalid executable-file format.
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.
Each of these functions creates a new process and executes it, and passes an array of pointers to command-line arguments and uses the
PATH environment variable to find the file to execute.
These functions validate their parameters. If either
argv is a null pointer, or if
argv points to null pointer, or
argv is an empty string, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, these functions set
EINVAL, and return -1. No new process is spawned.
||<stdio.h> or <process.h>|
||<stdio.h> or <wchar.h>|
For additional compatibility information, see Compatibility.
See the example in _spawn, _wspawn Functions.