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/*
* iod.c - Iterate a function on each entry of a directory
*
* Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
* Laboratoire MASI, Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
/*
* History:
* 93/10/30 - Creation
*/
#include "config.h"
#include "e2p.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#include <string.h>
#define max_long(a,b) ((((long) (a)) > ((long) (b))) ? (a) : (b))
int iterate_on_dir (const char * dir_name,
int (*func) (const char *, struct dirent *, void *),
void * private)
{
DIR * dir;
struct dirent *de, *dep;
long name_max = -1;
int max_len, len, ret = 0;
#if HAVE_PATHCONF && defined(_PC_NAME_MAX)
name_max = pathconf(dir_name, _PC_NAME_MAX);
#endif
#ifdef _POSIX_NAME_MAX
name_max = max_long(name_max, _POSIX_NAME_MAX);
#endif
#ifdef NAME_MAX
name_max = max_long(name_max, NAME_MAX);
#endif
name_max = max_long(name_max, 256);
/* clamp name_max in case the OS returns something crazy */
if (name_max > 65536)
name_max = 65536;
max_len = name_max + sizeof(struct dirent);
de = malloc(max_len+1);
if (!de)
return -1;
memset(de, 0, max_len+1);
dir = opendir (dir_name);
if (dir == NULL) {
free(de);
return -1;
}
while ((dep = readdir (dir))) {
#ifdef HAVE_RECLEN_DIRENT
len = dep->d_reclen;
if (len > max_len)
len = max_len;
#else
len = sizeof(struct dirent);
#endif
memcpy(de, dep, len);
if ((*func)(dir_name, de, private))
ret++;
}
free(de);
closedir(dir);
return ret;
}
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