1/* Routines for dealing with '\0' separated arg vectors.
2 Copyright (C) 1995-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <argz.h>
20#include <stdlib.h>
21#include <string.h>
22
23/* Make a '\0' separated arg vector from a unix argv vector, returning it in
24 ARGZ, and the total length in LEN. If a memory allocation error occurs,
25 ENOMEM is returned, otherwise 0. */
26error_t
27__argz_create (char *const argv[], char **argz, size_t *len)
28{
29 int argc;
30 size_t tlen = 0;
31 char *const *ap;
32 char *p;
33
34 for (argc = 0; argv[argc] != NULL; ++argc)
35 tlen += strlen (argv[argc]) + 1;
36
37 if (tlen == 0)
38 *argz = NULL;
39 else
40 {
41 *argz = malloc (tlen);
42 if (*argz == NULL)
43 return ENOMEM;
44
45 for (p = *argz, ap = argv; *ap; ++ap, ++p)
46 p = __stpcpy (p, *ap);
47 }
48 *len = tlen;
49
50 return 0;
51}
52weak_alias (__argz_create, argz_create)
53