LXR busybox/e2fsprogs/old_e2fsprogs/e2p/iod.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * iod.c                - Iterate a function on each entry of a directory
   4 *
   5 * Copyright (C) 1993, 1994  Remy Card <card@masi.ibp.fr>
   6 *                           Laboratoire MASI, Institut Blaise Pascal
   7 *                           Universite Pierre et Marie Curie (Paris VI)
   8 *
   9 * This file can be redistributed under the terms of the GNU Library General
  10 * Public License
  11 */
  12
  13/*
  14 * History:
  15 * 93/10/30     - Creation
  16 */
  17
  18#include "e2p.h"
  19#include <unistd.h>
  20#include <stdlib.h>
  21#include <string.h>
  22
  23int iterate_on_dir (const char * dir_name,
  24                    int (*func) (const char *, struct dirent *, void *),
  25                    void * private)
  26{
  27        DIR * dir;
  28        struct dirent *de, *dep;
  29        int     max_len, len;
  30
  31        max_len = PATH_MAX + sizeof(struct dirent);
  32        de = xmalloc(max_len+1);
  33        memset(de, 0, max_len+1);
  34
  35        dir = opendir (dir_name);
  36        if (dir == NULL) {
  37                free(de);
  38                return -1;
  39        }
  40        while ((dep = readdir (dir))) {
  41                len = sizeof(struct dirent);
  42                if (len < dep->d_reclen)
  43                        len = dep->d_reclen;
  44                if (len > max_len)
  45                        len = max_len;
  46                memcpy(de, dep, len);
  47                (*func) (dir_name, de, private);
  48        }
  49        free(de);
  50        closedir(dir);
  51        return 0;
  52}
  53