pw/rm_r.c

   1 /*-
   2  * Copyright (C) 1996
   3  *      David L. Nugent.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #ifndef lint
  28 static const char rcsid[] =
  29   "$FreeBSD$";
  30 #endif /* not lint */
  31
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <sys/param.h>
  38 #include <unistd.h>
  39 #include <dirent.h>
  40
  41 #include "pwupd.h"
  42
  43 void
  44 rm_r(char const * dir, uid_t uid)
  45 {
  46         DIR            *d = opendir(dir);
  47
  48         if (d != NULL) {
  49                 struct dirent  *e;
  50                 struct stat     st;
  51                 char            file[MAXPATHLEN];
  52
  53                 while ((e = readdir(d)) != NULL) {
  54                         if (strcmp(e->d_name, ".") != 0 && strcmp(e->d_name, "..") != 0) {
  55                                 snprintf(file, sizeof(file), "%s/%s", dir, e->d_name);
  56                                 if (lstat(file, &st) == 0) {    /* Need symlinks, not
  57                                                                  * linked file */
  58                                         if (S_ISDIR(st.st_mode))        /* Directory - recurse */
  59                                                 rm_r(file, uid);
  60                                         else {
  61                                                 if (S_ISLNK(st.st_mode) || st.st_uid == uid)
  62                                                         remove(file);
  63                                         }
  64                                 }
  65                         }
  66                 }
  67                 closedir(d);
  68                 if (lstat(dir, &st) == 0) {
  69                         if (S_ISLNK(st.st_mode))
  70                                 remove(dir);
  71                         else if (st.st_uid == uid)
  72                                 rmdir(dir);
  73                 }
  74         }
  75 }