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0ecb606c | 1 | /* Copyright (C) 1991,93,96,97,98,99,2002,2005 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 AJ |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
28f540f4 | 18 | |
28f540f4 RM |
19 | #include <unistd.h> |
20 | #include <stdarg.h> | |
21 | #include <stddef.h> | |
0ecb606c | 22 | #include <stdlib.h> |
c84142e8 | 23 | #include <string.h> |
28f540f4 | 24 | |
c4563d2d UD |
25 | #include <stackinfo.h> |
26 | ||
28f540f4 RM |
27 | /* Execute FILE, searching in the `PATH' environment variable if |
28 | it contains no slashes, with all arguments after FILE until a | |
29 | NULL pointer and environment from `environ'. */ | |
30 | int | |
b33f91e9 | 31 | execlp (const char *file, const char *arg, ...) |
28f540f4 | 32 | { |
0ecb606c JJ |
33 | #define INITIAL_ARGV_MAX 1024 |
34 | size_t argv_max = INITIAL_ARGV_MAX; | |
35 | const char *initial_argv[INITIAL_ARGV_MAX]; | |
36 | const char **argv = initial_argv; | |
28f540f4 RM |
37 | va_list args; |
38 | ||
c84142e8 UD |
39 | argv[0] = arg; |
40 | ||
b33f91e9 | 41 | va_start (args, arg); |
0ecb606c | 42 | unsigned int i = 0; |
b0df72f4 | 43 | while (argv[i++] != NULL) |
c84142e8 UD |
44 | { |
45 | if (i == argv_max) | |
46 | { | |
0ecb606c JJ |
47 | argv_max *= 2; |
48 | const char **nptr = realloc (argv == initial_argv ? NULL : argv, | |
49 | argv_max * sizeof (const char *)); | |
50 | if (nptr == NULL) | |
c84142e8 | 51 | { |
0ecb606c JJ |
52 | if (argv != initial_argv) |
53 | free (argv); | |
54 | return -1; | |
c84142e8 | 55 | } |
0ecb606c JJ |
56 | if (argv == initial_argv) |
57 | /* We have to copy the already filled-in data ourselves. */ | |
58 | memcpy (nptr, argv, i * sizeof (const char *)); | |
59 | ||
60 | argv = nptr; | |
c84142e8 | 61 | } |
28f540f4 | 62 | |
c84142e8 UD |
63 | argv[i] = va_arg (args, const char *); |
64 | } | |
28f540f4 RM |
65 | va_end (args); |
66 | ||
0ecb606c JJ |
67 | int ret = execvp (file, (char *const *) argv); |
68 | if (argv != initial_argv) | |
69 | free (argv); | |
70 | ||
71 | return ret; | |
28f540f4 | 72 | } |
c41f555e | 73 | libc_hidden_def (execlp) |