/* 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); }