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Diffstat (limited to 'source3/lib/repdir.c')
| -rw-r--r-- | source3/lib/repdir.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/source3/lib/repdir.c b/source3/lib/repdir.c deleted file mode 100644 index 08f7d16a81..0000000000 --- a/source3/lib/repdir.c +++ /dev/null @@ -1,217 +0,0 @@ -/* - Unix SMB/CIFS implementation. - - Copyright (C) Andrew Tridgell 2005 - Updated for Samba3 64-bit cleanliness (C) Jeremy Allison 2006 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. -*/ -/* - a replacement for opendir/readdir/telldir/seekdir/closedir for BSD systems - - This is needed because the existing directory handling in FreeBSD - and OpenBSD (and possibly NetBSD) doesn't correctly handle unlink() - on files in a directory where telldir() has been used. On a block - boundary it will occasionally miss a file when seekdir() is used to - return to a position previously recorded with telldir(). - - This also fixes a severe performance and memory usage problem with - telldir() on BSD systems. Each call to telldir() in BSD adds an - entry to a linked list, and those entries are cleaned up on - closedir(). This means with a large directory closedir() can take an - arbitrary amount of time, causing network timeouts as millions of - telldir() entries are freed - - Note! This replacement code is not portable. It relies on getdents() - always leaving the file descriptor at a seek offset that is a - multiple of DIR_BUF_SIZE. If the code detects that this doesn't - happen then it will abort(). It also does not handle directories - with offsets larger than can be stored in a long, - - This code is available under other free software licenses as - well. Contact the author. -*/ - -#include <include/includes.h> - - void replace_readdir_dummy(void); - void replace_readdir_dummy(void) {} - -#if defined(REPLACE_READDIR) - -#if defined(PARANOID_MALLOC_CHECKER) -#ifdef malloc -#undef malloc -#endif -#endif - -#define DIR_BUF_BITS 9 -#define DIR_BUF_SIZE (1<<DIR_BUF_BITS) - -struct dir_buf { - int fd; - int nbytes, ofs; - SMB_OFF_T seekpos; - char buf[DIR_BUF_SIZE]; -}; - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OPENDIR64) - SMB_STRUCT_DIR *opendir64(const char *dname) -#else - SMB_STRUCT_DIR *opendir(const char *dname) -#endif -{ - struct dir_buf *d; - d = malloc(sizeof(*d)); - if (d == NULL) { - errno = ENOMEM; - return NULL; - } -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OPEN64) - d->fd = open64(dname, O_RDONLY); -#else - d->fd = open(dname, O_RDONLY); -#endif - - if (d->fd == -1) { - free(d); - return NULL; - } - d->ofs = 0; - d->seekpos = 0; - d->nbytes = 0; - return (SMB_STRUCT_DIR *)d; -} - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_READDIR64) - SMB_STRUCT_DIRENT *readdir64(SMB_STRUCT_DIR *dir) -#else - SMB_STRUCT_DIRENT *readdir(SMB_STRUCT_DIR *dir) -#endif -{ - struct dir_buf *d = (struct dir_buf *)dir; - SMB_STRUCT_DIRENT *de; - - if (d->ofs >= d->nbytes) { -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_LSEEK64) - d->seekpos = lseek64(d->fd, 0, SEEK_CUR); -#else - d->seekpos = lseek(d->fd, 0, SEEK_CUR); -#endif - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_GETDENTS64) - d->nbytes = getdents64(d->fd, d->buf, DIR_BUF_SIZE); -#else - d->nbytes = getdents(d->fd, d->buf, DIR_BUF_SIZE); -#endif - d->ofs = 0; - } - if (d->ofs >= d->nbytes) { - return NULL; - } - de = (SMB_STRUCT_DIRENT *)&d->buf[d->ofs]; - d->ofs += de->d_reclen; - return de; -} - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_TELLDIR64) - long telldir64(SMB_STRUCT_DIR *dir) -#else - long telldir(SMB_STRUCT_DIR *dir) -#endif -{ - struct dir_buf *d = (struct dir_buf *)dir; - if (d->ofs >= d->nbytes) { -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_LSEEK64) - d->seekpos = lseek64(d->fd, 0, SEEK_CUR); -#else - d->seekpos = lseek(d->fd, 0, SEEK_CUR); -#endif - d->ofs = 0; - d->nbytes = 0; - } - /* this relies on seekpos always being a multiple of - DIR_BUF_SIZE. Is that always true on BSD systems? */ - if (d->seekpos & (DIR_BUF_SIZE-1)) { - abort(); - } - return d->seekpos + d->ofs; -} - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_SEEKDIR64) - void seekdir64(SMB_STRUCT_DIR *dir, long ofs) -#else - void seekdir(SMB_STRUCT_DIR *dir, long ofs) -#endif -{ - struct dir_buf *d = (struct dir_buf *)dir; -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_LSEEK64) - d->seekpos = lseek64(d->fd, ofs & ~(DIR_BUF_SIZE-1), SEEK_SET); -#else - d->seekpos = lseek(d->fd, ofs & ~(DIR_BUF_SIZE-1), SEEK_SET); -#endif - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_GETDENTS64) - d->nbytes = getdents64(d->fd, d->buf, DIR_BUF_SIZE); -#else - d->nbytes = getdents(d->fd, d->buf, DIR_BUF_SIZE); -#endif - - d->ofs = 0; - while (d->ofs < (ofs & (DIR_BUF_SIZE-1))) { -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_READDIR64) - if (readdir64(dir) == NULL) break; -#else - if (readdir(dir) == NULL) break; -#endif - } -} - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_REWINDDIR64) - void rewinddir64(SMB_STRUCT_DIR *dir) -#else - void rewinddir(SMB_STRUCT_DIR *dir) -#endif -{ -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_SEEKDIR64) - seekdir64(dir, 0); -#else - seekdir(dir, 0); -#endif -} - -#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_CLOSEDIR64) - int closedir64(SMB_STRUCT_DIR *dir) -#else - int closedir(SMB_STRUCT_DIR *dir) -#endif -{ - struct dir_buf *d = (struct dir_buf *)dir; - int r = close(d->fd); - if (r != 0) { - return r; - } - free(d); - return 0; -} - -#ifndef dirfd -/* darn, this is a macro on some systems. */ - int dirfd(SMB_STRUCT_DIR *dir) -{ - struct dir_buf *d = (struct dir_buf *)dir; - return d->fd; -} -#endif -#endif /* REPLACE_READDIR */ |