_execvpe, _wexecvpe

Статья
10/16/2008

Loads and executes new child processes.

intptr_t _execvpe( 
   const char *cmdname,
   const char *const *argv,
   const char *const *envp 
);
intptr_t _wexecvpe( 
   const wchar_t *cmdname,
   const wchar_t *const *argv,
   const wchar_t *const *envp 
);

Параметры

cmdname
Path of the file to execute.
argv
Array of pointers to parameters.
envp
Array of pointers to environment settings.

Возвращаемое значение

If successful, these functions do not 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.
EMFILE	Too many files open (the specified file must be opened to determine whether it is executable).
ENOENT	The file or path not found.
ENOEXEC	The specified file is not 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 was not allocated properly.

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

Заметки

Each of these functions loads 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.

In Visual C++ 2005, the _execvpe functions validate their parameters. If the cmdname is a null pointer, or if argv is a null pointer, pointer to an empty array, or if the array contains an empty string as the first argument, 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 process is launched.