1/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
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.
8
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
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <unistd.h>
19#include <stdarg.h>
20#include <errno.h>
21#include <sys/param.h>
22
23/* Execute FILE, searching in the `PATH' environment variable if
24 it contains no slashes, with all arguments after FILE until a
25 NULL pointer and environment from `environ'. */
26int
27execlp (const char *file, const char *arg, ...)
28{
29 ptrdiff_t argc;
30 va_list ap;
31 va_start (ap, arg);
32 for (argc = 1; va_arg (ap, const char *); argc++)
33 {
34 if (argc == INT_MAX)
35 {
36 va_end (ap);
37 errno = E2BIG;
38 return -1;
39 }
40 }
41 va_end (ap);
42
43 /* Although posix does not state execlp as an async-safe function
44 it can not use malloc to allocate the arguments since it might
45 be used in a vfork scenario and it may lead to malloc internal
46 bad state. */
47 ptrdiff_t i;
48 char *argv[argc + 1];
49 va_start (ap, arg);
50 argv[0] = (char *) arg;
51 for (i = 1; i <= argc; i++)
52 argv[i] = va_arg (ap, char *);
53 va_end (ap);
54
55 return __execvpe (file, argv, __environ);
56}
57libc_hidden_def (execlp)
58