| /* Copyright (C) 1991-2018 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 <errno.h> |
| #include <sys/param.h> |
| |
| /* Execute PATH with all arguments after PATH until a NULL pointer, |
| and the argument after that for environment. */ |
| int |
| execle (const char *path, const char *arg, ...) |
| { |
| ptrdiff_t argc; |
| va_list ap; |
| va_start (ap, arg); |
| for (argc = 1; va_arg (ap, const char *); argc++) |
| { |
| if (argc == INT_MAX) |
| { |
| va_end (ap); |
| errno = E2BIG; |
| return -1; |
| } |
| } |
| va_end (ap); |
| |
| /* Avoid dynamic memory allocation due two main issues: |
| 1. The function should be async-signal-safe and a running on a signal |
| handler with a fail outcome might lead to malloc bad state. |
| 2. It might be used in a vfork/clone(VFORK) scenario where using |
| malloc also might lead to internal bad state. */ |
| ptrdiff_t i; |
| char *argv[argc + 1]; |
| char **envp; |
| va_start (ap, arg); |
| argv[0] = (char *) arg; |
| for (i = 1; i <= argc; i++) |
| argv[i] = va_arg (ap, char *); |
| envp = va_arg (ap, char **); |
| va_end (ap); |
| |
| return __execve (path, argv, envp); |
| } |
| libc_hidden_def (execle) |