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b168057a | 1 | /* Copyright (C) 1991-2015 Free Software Foundation, Inc. |
c84142e8 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
c84142e8 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
c84142e8 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
28f540f4 RM |
18 | #include <unistd.h> |
19 | #include <stdarg.h> | |
20 | #include <stddef.h> | |
57b47af9 | 21 | #include <stdlib.h> |
c84142e8 | 22 | #include <string.h> |
28f540f4 | 23 | |
c4563d2d UD |
24 | #include <stackinfo.h> |
25 | ||
28f540f4 RM |
26 | /* Execute PATH with all arguments after PATH until a NULL pointer, |
27 | and the argument after that for environment. */ | |
28 | int | |
c84142e8 | 29 | execle (const char *path, const char *arg, ...) |
28f540f4 | 30 | { |
57b47af9 UD |
31 | #define INITIAL_ARGV_MAX 1024 |
32 | size_t argv_max = INITIAL_ARGV_MAX; | |
33 | const char *initial_argv[INITIAL_ARGV_MAX]; | |
34 | const char **argv = initial_argv; | |
28f540f4 | 35 | va_list args; |
c84142e8 | 36 | argv[0] = arg; |
28f540f4 | 37 | |
c4563d2d | 38 | va_start (args, arg); |
57b47af9 | 39 | unsigned int i = 0; |
b0df72f4 | 40 | while (argv[i++] != NULL) |
28f540f4 | 41 | { |
c84142e8 UD |
42 | if (i == argv_max) |
43 | { | |
57b47af9 UD |
44 | argv_max *= 2; |
45 | const char **nptr = realloc (argv == initial_argv ? NULL : argv, | |
46 | argv_max * sizeof (const char *)); | |
47 | if (nptr == NULL) | |
c84142e8 | 48 | { |
57b47af9 UD |
49 | if (argv != initial_argv) |
50 | free (argv); | |
51 | return -1; | |
c84142e8 | 52 | } |
57b47af9 UD |
53 | if (argv == initial_argv) |
54 | /* We have to copy the already filled-in data ourselves. */ | |
55 | memcpy (nptr, argv, i * sizeof (const char *)); | |
56 | ||
57 | argv = nptr; | |
c84142e8 UD |
58 | } |
59 | ||
60 | argv[i] = va_arg (args, const char *); | |
61 | } | |
28f540f4 | 62 | |
57b47af9 | 63 | const char *const *envp = va_arg (args, const char *const *); |
c4563d2d | 64 | va_end (args); |
28f540f4 | 65 | |
57b47af9 UD |
66 | int ret = __execve (path, (char *const *) argv, (char *const *) envp); |
67 | if (argv != initial_argv) | |
68 | free (argv); | |
69 | ||
70 | return ret; | |
28f540f4 | 71 | } |
c41f555e | 72 | libc_hidden_def (execle) |