117721Speter/* rename.c -- BSD compatible directory function for System V 217721Speter Copyright (C) 1988, 1990 Free Software Foundation, Inc. 317721Speter 417721Speter This program is free software; you can redistribute it and/or modify 517721Speter it under the terms of the GNU General Public License as published by 617721Speter the Free Software Foundation; either version 2, or (at your option) 717721Speter any later version. 817721Speter 917721Speter This program is distributed in the hope that it will be useful, 1017721Speter but WITHOUT ANY WARRANTY; without even the implied warranty of 1117721Speter MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1225839Speter GNU General Public License for more details. */ 1317721Speter 1417721Speter#ifdef HAVE_CONFIG_H 1517721Speter#include "config.h" 1617721Speter#endif 1717721Speter 1817721Speter#include <sys/types.h> 1917721Speter#include <sys/stat.h> 2017721Speter#include <errno.h> 2117721Speter#ifndef STDC_HEADERS 2217721Speterextern int errno; 2317721Speter#endif 2417721Speter 2517721Speter/* Rename file FROM to file TO. 2617721Speter Return 0 if successful, -1 if not. */ 2717721Speter 2817721Speterint 2917721Speterrename (from, to) 3017721Speter char *from; 3117721Speter char *to; 3217721Speter{ 3317721Speter struct stat from_stats; 3417721Speter int pid, status; 3517721Speter 3617721Speter if (stat (from, &from_stats) == 0) 3717721Speter { 3817721Speter /* We don't check existence_error because the systems which need it 3917721Speter have rename(). */ 4081404Speter if (CVS_UNLINK (to) && errno != ENOENT) 4117721Speter return -1; 4217721Speter if ((from_stats.st_mode & S_IFMT) == S_IFDIR) 4317721Speter { 4417721Speter#ifdef MVDIR 4517721Speter /* I don't think MVDIR ever gets defined, but I don't think 4617721Speter it matters, because I don't think CVS ever calls rename() 4717721Speter on directories. */ 4817721Speter 4917721Speter /* Need a setuid root process to link and unlink directories. */ 5017721Speter pid = fork (); 5117721Speter switch (pid) 5217721Speter { 5317721Speter case -1: /* Error. */ 5417721Speter error (1, errno, "cannot fork"); 5517721Speter 5617721Speter case 0: /* Child. */ 5717721Speter execl (MVDIR, "mvdir", from, to, (char *) 0); 5817721Speter error (255, errno, "cannot run `%s'", MVDIR); 5917721Speter 6017721Speter default: /* Parent. */ 6117721Speter while (wait (&status) != pid) 6217721Speter /* Do nothing. */ ; 6317721Speter 6417721Speter errno = 0; /* mvdir printed the system error message. */ 6517721Speter return status != 0 ? -1 : 0; 6617721Speter } 6717721Speter#else /* no MVDIR */ 6817721Speter error (1, 0, "internal error: cannot move directories"); 6917721Speter#endif /* no MVDIR */ 7017721Speter } 7117721Speter else 7217721Speter { 7317721Speter /* We don't check existence_error because the systems which need it 7417721Speter have rename(). */ 7581404Speter if (link (from, to) == 0 && (CVS_UNLINK (from) == 0 || errno == ENOENT)) 7617721Speter return 0; 7717721Speter } 7817721Speter } 7917721Speter return -1; 8017721Speter} 81