Daily bump.
[official-gcc.git] / libiberty / rename.c
blob05630629c1fa8ddf5bae328fbd6d9b03d51a447f
1 /* rename -- rename a file
2 This function is in the public domain. */
4 /*
6 @deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new})
8 Renames a file from @var{old} to @var{new}. If @var{new} already
9 exists, it is removed.
11 @end deftypefn
15 #ifdef HAVE_CONFIG_H
16 #include "config.h"
17 #endif
18 #include <errno.h>
19 #ifdef HAVE_UNISTD_H
20 #include <unistd.h>
21 #endif
23 int
24 rename (zfrom, zto)
25 char *zfrom;
26 char *zto;
28 if (link (zfrom, zto) < 0)
30 if (errno != EEXIST)
31 return -1;
32 if (unlink (zto) < 0
33 || link (zfrom, zto) < 0)
34 return -1;
36 return unlink (zfrom);