added lseek() support for directories

(This used to be commit 67ca971b0b00b5256b0af2c1c5777c393f9cef0b)

3 files changed, 82 insertions, 3 deletions

diff --git a/source3/smbwrapper/lseek.c b/source3/smbwrapper/lseek.c
new file mode 100644
index 0000000000..3507dab690
--- /dev/null
+++ b/source3/smbwrapper/lseek.c
@@ -0,0 +1,35 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 2.0
+   SMB wrapper functions
+   Copyright (C) Andrew Tridgell 1998
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "wrapper.h"
+
+#ifdef linux
+__asm__(".globl __lseek; __lseek = lseek");
+#endif
+
+ ssize_t lseek(int fd, off_t offset, int whence)
+{
+	if (smbw_fd(fd)) {
+		return smbw_lseek(fd, offset, whence);
+	}
+
+	return real_lseek(fd, offset, whence);
+}
diff --git a/source3/smbwrapper/realcalls.h b/source3/smbwrapper/realcalls.h
index ef173c8964..898a94eeb4 100644
--- a/source3/smbwrapper/realcalls.h
+++ b/source3/smbwrapper/realcalls.h
@@ -32,6 +32,7 @@ struct dirent *__libc_readdir(DIR * dir);
 #define real_stat(fn, buf )		(syscall(SYS_stat, (fn), (buf)))
 #define real_fstat(fd, buf )		(syscall(SYS_fstat, (fd), (buf)))
 #define real_read(fd, buf, count )	(syscall(SYS_read, (fd), (buf), (count)))
+#define real_lseek(fd, offset, whence)	(syscall(SYS_lseek, (fd), (offset), (whence)))
 #define real_write(fd, buf, count )	(syscall(SYS_write, (fd), (buf), (count)))
 #define real_close(fd)	                (syscall(SYS_close, (fd)))
 #define real_fcntl(fd,cmd,arg)	        (syscall(SYS_fcntl, (fd), (cmd), (arg)))
diff --git a/source3/smbwrapper/smbw.c b/source3/smbwrapper/smbw.c
index 5392cf1abc..d77f33c97e 100644
--- a/source3/smbwrapper/smbw.c
+++ b/source3/smbwrapper/smbw.c
@@ -654,6 +654,8 @@ int smbw_dir_open(const char *fname, int flags)
 
 	dir->fd = fd + SMBW_FD_OFFSET;
 
+	DEBUG(4,("  -> %d\n", dir->count));
+
 	return dir->fd;
 
  failed:
@@ -1053,6 +1055,9 @@ int smbw_getdents(unsigned int fd, struct dirent *dirp, int count)
 			    sizeof(dirp->d_name)-1);
 		dir->offset++;
 		count -= dirp->d_reclen;
+		if (dir->offset == dir->count) {
+			dirp->d_off = -1;
+		}
 		dirp++;
 		n++;
 	}
@@ -1410,10 +1415,48 @@ int smbw_chmod(const char *fname, mode_t newmode)
 	return -1;
 }
 
+
+/***************************************************** 
+a wrapper for lseek() on directories
+*******************************************************/
+off_t smbw_dir_lseek(int fd, off_t offset, int whence)
+{
+	struct smbw_dir *dir;
+	off_t ret;
+
+	DEBUG(4,("%s offset=%d whence=%d\n", __FUNCTION__, 
+		 (int)offset, whence));
+
+	dir = smbw_dir(fd);
+	if (!dir) {
+		errno = EBADF;
+		return -1;
+	}
+
+	switch (whence) {
+	case SEEK_SET:
+		dir->offset = offset/sizeof(struct dirent);
+		break;
+	case SEEK_CUR:
+		dir->offset += offset/sizeof(struct dirent);
+		break;
+	case SEEK_END:
+		dir->offset = (dir->count * sizeof(struct dirent)) + offset;
+		dir->offset /= sizeof(struct dirent);
+		break;
+	}
+
+	ret = dir->offset * sizeof(struct dirent);
+
+	DEBUG(4,("   -> %d\n", (int)ret));
+
+	return ret;
+}
+
 /***************************************************** 
 a wrapper for lseek()
 *******************************************************/
-ssize_t smbw_lseek(int fd, off_t offset, int whence)
+off_t smbw_lseek(int fd, off_t offset, int whence)
 {
 	struct smbw_file *file;
 	uint32 size;
@@ -1424,9 +1467,9 @@ ssize_t smbw_lseek(int fd, off_t offset, int whence)
 
 	file = smbw_file(fd);
 	if (!file) {
-		errno = EBADF;
+		off_t ret = smbw_dir_lseek(fd, offset, whence);
 		smbw_busy--;
-		return -1;
+		return ret;
 	}
 
 	switch (whence) {