1/* unlink-if-ordinary.c - remove link to a file unless it is special
2 Copyright (C) 2004-2024 Free Software Foundation, Inc.
3
4This file is part of the libiberty library. This library is free
5software; you can redistribute it and/or modify it under the
6terms of the GNU General Public License as published by the
7Free Software Foundation; either version 2, or (at your option)
8any later version.
9
10This library is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with GNU CC; see the file COPYING. If not, write to
17the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
18
19As a special exception, if you link this library with files
20compiled with a GNU compiler to produce an executable, this does not cause
21the resulting executable to be covered by the GNU General Public License.
22This exception does not however invalidate any other reasons why
23the executable file might be covered by the GNU General Public License. */
24
25/*
26
27@deftypefn Supplemental int unlink_if_ordinary (const char*)
28
29Unlinks the named file, unless it is special (e.g. a device file).
30Returns 0 when the file was unlinked, a negative value (and errno set) when
31there was an error deleting the file, and a positive value if no attempt
32was made to unlink the file because it is special.
33
34@end deftypefn
35
36*/
37
38#ifdef HAVE_CONFIG_H
39#include "config.h"
40#endif
41
42#include <sys/types.h>
43
44#ifdef HAVE_UNISTD_H
45#include <unistd.h>
46#endif
47#if HAVE_SYS_STAT_H
48#include <sys/stat.h>
49#endif
50
51#include "libiberty.h"
52
53#ifndef S_ISLNK
54#ifdef S_IFLNK
55#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
56#else
57#define S_ISLNK(m) 0
58#define lstat stat
59#endif
60#endif
61
62int
63unlink_if_ordinary (const char *name)
64{
65 struct stat st;
66
67 if (lstat (file: name, buf: &st) == 0
68 && (S_ISREG (st.st_mode) || S_ISLNK (st.st_mode)))
69 return unlink (name: name);
70
71 return 1;
72}
73

source code of libiberty/unlink-if-ordinary.c