| /* unlink-if-ordinary.c - remove link to a file unless it is special |
| Copyright (C) 2004-2020 Free Software Foundation, Inc. |
| |
| This file is part of the libiberty library. This library is free |
| software; you can redistribute it and/or modify it under the |
| terms of the GNU General Public License as published by the |
| Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
| |
| As a special exception, if you link this library with files |
| compiled with a GNU compiler to produce an executable, this does not cause |
| the resulting executable to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why |
| the executable file might be covered by the GNU General Public License. */ |
| |
| /* |
| |
| @deftypefn Supplemental int unlink_if_ordinary (const char*) |
| |
| Unlinks the named file, unless it is special (e.g. a device file). |
| Returns 0 when the file was unlinked, a negative value (and errno set) when |
| there was an error deleting the file, and a positive value if no attempt |
| was made to unlink the file because it is special. |
| |
| @end deftypefn |
| |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <sys/types.h> |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #if HAVE_SYS_STAT_H |
| #include <sys/stat.h> |
| #endif |
| |
| #include "libiberty.h" |
| |
| #ifndef S_ISLNK |
| #ifdef S_IFLNK |
| #define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) |
| #else |
| #define S_ISLNK(m) 0 |
| #define lstat stat |
| #endif |
| #endif |
| |
| int |
| unlink_if_ordinary (const char *name) |
| { |
| struct stat st; |
| |
| if (lstat (name, &st) == 0 |
| && (S_ISREG (st.st_mode) || S_ISLNK (st.st_mode))) |
| return unlink (name); |
| |
| return 1; |
| } |