oops - omitted from previous delta. This change is:
[official-gcc.git] / libiberty / rename.c
blob399980ab7d7e995f5fb344f8f144d8959d727b5f
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 #include "ansidecl.h"
16 #ifdef HAVE_CONFIG_H
17 #include "config.h"
18 #endif
19 #include <errno.h>
20 #ifdef HAVE_UNISTD_H
21 #include <unistd.h>
22 #endif
24 int
25 rename (zfrom, zto)
26 const char *zfrom;
27 const char *zto;
29 if (link (zfrom, zto) < 0)
31 if (errno != EEXIST)
32 return -1;
33 if (unlink (zto) < 0
34 || link (zfrom, zto) < 0)
35 return -1;
37 return unlink (zfrom);