| /* rename -- rename a file | |
| This function is in the public domain. */ | |
| /* Rename a file. */ | |
| #include <errno.h> | |
| int | |
| rename (zfrom, zto) | |
| char *zfrom; | |
| 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); | |
| } |