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