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      1 /*	$NetBSD: compat_readdir.c,v 1.3 2012/02/08 12:10:17 mbalmer Exp $	*/
      2 
      3 #define __LIBC12_SOURCE__
      4 #include "namespace.h"
      5 #include <sys/param.h>
      6 #include <dirent.h>
      7 #include <errno.h>
      8 #include <string.h>
      9 #include <limits.h>
     10 #include <compat/include/dirent.h>
     11 
     12 #ifdef __weak_alias
     13 __weak_alias(readdir,_readdir)
     14 __weak_alias(readdir_r,_readdir_r)
     15 #endif
     16 
     17 #ifdef __warn_references
     18 __warn_references(readdir,
     19     "warning: reference to compatibility readdir(); include <dirent.h> for correct reference")
     20 __warn_references(readdir_r,
     21     "warning: reference to compatibility readdir_r(); include <dirent.h> for correct reference")
     22 #endif
     23 
     24 static struct dirent12 *
     25 direnttodirent12(struct dirent12 *d12, const struct dirent *d)
     26 {
     27 	if (d == NULL)
     28 		return NULL;
     29 
     30 	if (d->d_fileno > UINT_MAX || d->d_namlen >= sizeof(d12->d_name)) {
     31 		errno = ERANGE;
     32 		return NULL;
     33 	}
     34 	d12->d_fileno = (uint32_t)d->d_fileno;
     35 	d12->d_reclen = (uint16_t)d->d_reclen;
     36 	d12->d_namlen = (uint8_t)MIN(d->d_namlen, sizeof(d->d_name) - 1);
     37 	d12->d_type = (uint8_t)d->d_type;
     38 	memcpy(d12->d_name, d->d_name, (size_t)d12->d_namlen);
     39 	d12->d_name[d12->d_namlen] = '\0';
     40 	return d12;
     41 }
     42 
     43 struct dirent12 *
     44 readdir(DIR *dirp)
     45 {
     46 	static struct dirent12 d12;
     47 	return direnttodirent12(&d12, __readdir30(dirp));
     48 }
     49 
     50 int
     51 readdir_r(DIR *dirp, struct dirent12 *entry, struct dirent12 **result)
     52 {
     53 	int error;
     54 	struct dirent e, *ep;
     55 
     56 	if ((error = __readdir_r30(dirp, &e, &ep)) != 0)
     57 		return error;
     58 
     59 	*result = entry;
     60 	(void)direnttodirent12(entry, &e);
     61 	return 0;
     62 }
     63