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67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/*
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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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* This file can be redistributed under the terms of the GNU Library General
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* Public License
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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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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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#if HAVE_DIRENT_NAMELEN
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/* Declare DE_BUF with some extra room for the name. */
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char de_buf[sizeof (struct dirent) + 32];
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struct dirent *de = (struct dirent *)&de_buf;
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#else
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struct dirent de_buf, *de = &de_buf;
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#endif
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struct dirent *dep;
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dir = opendir (dir_name);
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if (dir == NULL)
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return -1;
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while ((dep = readdir (dir)))
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{
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#if HAVE_DIRENT_NAMELEN
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/* See if there's enough room for this entry in DE, and grow if
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not. */
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if (de_len < dep->d_reclen)
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{
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de_len = dep->d_reclen + 32;
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de =
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(de == (struct dirent *)&de_buf
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? malloc (de_len)
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: realloc (de, de_len));
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if (de == NULL)
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{
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errno = ENOMEM;
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return -1;
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}
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}
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memcpy (de, dep, dep->d_reclen);
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#else
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*de = *dep;
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#endif
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(*func) (dir_name, de, private);
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}
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#if HAVE_DIRENT_NAMELEN
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if (de != (struct dirent *)&de_buf)
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free (de);
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#endif
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closedir (dir);
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return 0;
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}
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