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/*
* Copyright (c) 2003 Gunnar Ritter
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
/* Sccsid @(#)getdir.c 1.20 (gritter) 5/14/06 */
#ifndef __linux__
/*
* 32-bit Solaris and Open UNIX do not have 64-bit getdents(); but
* having _FILE_OFFSET_BITS=64 will make it use a dirent64 struct
* on Open UNIX -> SEGV.
*/
#undef _FILE_OFFSET_BITS
#endif /* !__linux__ */
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#if defined (__UCLIBC__)
#include <linux/types.h>
#include <linux/dirent.h>
#define getdents(a, b, c) __getdents64(a, b, c)
#define dirent dirent64
extern int getdents(int, struct dirent *, size_t);
#elif defined (__GLIBC__) || defined (__FreeBSD__) || defined (_AIX) || \
defined (__NetBSD__) || defined (__OpenBSD__) || \
defined (__DragonFly__) || defined (__APPLE__)
#include <dirent.h>
#define getdents(a, b, c) getdirentries((a), (char *)(b), (c), &(db->g_offs))
#if defined (__FreeBSD__) || defined (__NetBSD__) || defined (__OpenBSD__) || \
defined (__DragonFly__) || defined (__APPLE__)
#undef d_ino
#endif /* __FreeBSD__ || __NetBSD__ || __OpenBSD__ || __DragonFly__
|| __APPLE__ */
#elif defined (__dietlibc__)
#include <dirent.h>
#include <unistd.h>
#else /* !__GLIBC__, !__dietlibc__ */
#ifdef __hpux
#define _KERNEL
#endif /* __hpux */
#include <sys/dirent.h>
#ifdef __hpux
#ifndef _INO64_T
typedef unsigned long long uint64_t;
typedef uint64_t ino64_t;
#endif /* !_INO64_T */
#ifdef __LP64__
#define dirent __dirent64
#else /* !__LP64__ */
#define dirent __dirent32
#endif /* !__LP64__ */
#define d_reclen __d_reclen
#define d_name __d_name
#define d_ino __d_ino
#endif /* __hpux */
#endif /* !__GLIBC__, !__dietlibc__ */
#include "getdir.h"
#define DIBSIZE 5120
struct getdb {
#if !defined (__FreeBSD__) && !defined (__NetBSD__) && !defined (__OpenBSD__) \
&& !defined (__DragonFly__) && !defined (__APPLE__)
off_t g_offs;
#else /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
long g_offs;
#endif /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
struct dirent *g_dirp;
const char *g_path;
struct direc g_dic;
union {
char g_dirbuf[DIBSIZE+1];
struct dirent g_dummy[1];
} g_u;
int g_num;
int g_fd;
};
struct getdb *
getdb_alloc(const char *path, int fd)
{
struct getdb *db;
if ((db = malloc(sizeof *db)) == NULL)
return NULL;
db->g_dirp = NULL;
db->g_offs = 0;
db->g_fd = fd;
db->g_path = path;
return db;
}
void
getdb_free(struct getdb *db)
{
free(db);
}
struct direc *
getdir(struct getdb *db, int *err)
{
int reclen;
*err = 0;
while (db->g_dirp == NULL)
{
/*LINTED*/
db->g_num = getdents(db->g_fd,
(struct dirent *)db->g_u.g_dirbuf,
DIBSIZE);
if (db->g_num <= 0) {
if (db->g_num < 0)
*err = errno;
db->g_offs = 0;
return NULL;
}
/*LINTED*/
db->g_dirp = (struct dirent *)db->g_u.g_dirbuf;
while (db->g_dirp &&
#if !defined (__FreeBSD__) && !defined (__NetBSD__) && !defined (__OpenBSD__) \
&& !defined (__DragonFly__) && !defined (__APPLE__)
db->g_dirp->d_ino == 0
#else /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
(db->g_dirp->d_fileno == 0
#ifdef DT_WHT
|| db->g_dirp->d_type == DT_WHT
#endif
)
#endif /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
)
{
next:
#ifndef __DragonFly__
reclen = db->g_dirp->d_reclen;
#else
reclen = _DIRENT_DIRSIZ(db->g_dirp);
#endif
if ((db->g_num -= reclen) == 0 || reclen == 0)
db->g_dirp = NULL;
else
db->g_dirp =
/*LINTED*/
(struct dirent *)((char *)db->g_dirp
+ reclen);
}
}
#if !defined (__FreeBSD__) && !defined (__NetBSD__) && !defined (__OpenBSD__) \
&& !defined (__DragonFly__) && !defined (__APPLE__)
if (db->g_dirp->d_ino == 0)
goto next;
db->g_dic.d_ino = db->g_dirp->d_ino;
#else /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
if (db->g_dirp->d_fileno == 0
#ifdef DT_WHT
|| db->g_dirp->d_type == DT_WHT
#endif
)
{
goto next;
}
db->g_dic.d_ino = db->g_dirp->d_fileno;
#endif /* __FreeBSD__, __NetBSD__, __OpenBSD__, __DragonFly__, __APPLE__ */
db->g_dic.d_name = db->g_dirp->d_name;
#ifndef __DragonFly__
reclen = db->g_dirp->d_reclen;
#else
reclen = _DIRENT_DIRSIZ(db->g_dirp);
#endif
if ((db->g_num -= reclen) == 0 || reclen == 0)
db->g_dirp = NULL;
else
/*LINTED*/
db->g_dirp = (struct dirent *)((char *)db->g_dirp + reclen);
return &(db->g_dic);
}
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