mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 09:01:07 +00:00
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/* Copyright (C) 1991-2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <unistd.h>
|
|
#include <stdarg.h>
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <stackinfo.h>
|
|
|
|
/* Execute FILE, searching in the `PATH' environment variable if
|
|
it contains no slashes, with all arguments after FILE until a
|
|
NULL pointer and environment from `environ'. */
|
|
int
|
|
execlp (const char *file, const char *arg, ...)
|
|
{
|
|
#define INITIAL_ARGV_MAX 1024
|
|
size_t argv_max = INITIAL_ARGV_MAX;
|
|
const char *initial_argv[INITIAL_ARGV_MAX];
|
|
const char **argv = initial_argv;
|
|
va_list args;
|
|
|
|
argv[0] = arg;
|
|
|
|
va_start (args, arg);
|
|
unsigned int i = 0;
|
|
while (argv[i++] != NULL)
|
|
{
|
|
if (i == argv_max)
|
|
{
|
|
argv_max *= 2;
|
|
const char **nptr = realloc (argv == initial_argv ? NULL : argv,
|
|
argv_max * sizeof (const char *));
|
|
if (nptr == NULL)
|
|
{
|
|
if (argv != initial_argv)
|
|
free (argv);
|
|
return -1;
|
|
}
|
|
if (argv == initial_argv)
|
|
/* We have to copy the already filled-in data ourselves. */
|
|
memcpy (nptr, argv, i * sizeof (const char *));
|
|
|
|
argv = nptr;
|
|
}
|
|
|
|
argv[i] = va_arg (args, const char *);
|
|
}
|
|
va_end (args);
|
|
|
|
int ret = execvp (file, (char *const *) argv);
|
|
if (argv != initial_argv)
|
|
free (argv);
|
|
|
|
return ret;
|
|
}
|
|
libc_hidden_def (execlp)
|