| /* rename -- rename a file |
| This function is in the public domain. */ |
| |
| /* |
| |
| @deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new}) |
| |
| Renames a file from @var{old} to @var{new}. If @var{new} already |
| exists, it is removed. |
| |
| @end deftypefn |
| |
| */ |
| |
| #include "ansidecl.h" |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #include <errno.h> |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| int |
| rename (const char *zfrom, const char *zto) |
| { |
| if (link (zfrom, zto) < 0) |
| { |
| if (errno != EEXIST) |
| return -1; |
| if (unlink (zto) < 0 |
| || link (zfrom, zto) < 0) |
| return -1; |
| } |
| return unlink (zfrom); |
| } |
