| /* Copyright (C) 1991,92,94,97,98,99,2002,2005 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <unistd.h> |
| #include <stdarg.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <stackinfo.h> |
| |
| |
| /* Execute PATH with all arguments after PATH until |
| a NULL pointer and environment from `environ'. */ |
| int |
| execl (const char *path, 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 = __execve (path, (char *const *) argv, __environ); |
| if (argv != initial_argv) |
| free (argv); |
| |
| return ret; |
| } |
| libc_hidden_def (execl) |