r2404: the first large lump of posix vfs stuff.

this is still very much a skeleton (with many limbs missing too!). I
am committing this early to get some feedback on the approach taken.
(This used to be commit 40d5cae5ebbfe328e193eadb685df6a370730299)

1 files changed, 126 insertions, 0 deletions

diff --git a/source4/ntvfs/posix/pvfs_dirlist.c b/source4/ntvfs/posix/pvfs_dirlist.c
new file mode 100644
index 0000000000..1b4d01c197
--- /dev/null
+++ b/source4/ntvfs/posix/pvfs_dirlist.c
@@ -0,0 +1,126 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Copyright (C) Andrew Tridgell 2004
+
+   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.
+*/
+/*
+  directory listing functions for posix backend
+*/
+
+#include "includes.h"
+#include "vfs_posix.h"
+
+/*
+  a special directory listing case where the pattern has no wildcard. We can just do a single stat()
+  thus avoiding the more expensive directory scan
+*/
+static NTSTATUS pvfs_list_no_wildcard(struct pvfs_state *pvfs, struct pvfs_filename *name, 
+				      const char *pattern, struct pvfs_dir *dir)
+{
+	if (!name->exists) {
+		return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+	}
+
+	dir->count = 0;
+	dir->unix_path = name->full_name;
+
+	dir->names = talloc_array_p(dir, const char *, 1);
+	if (!dir->names) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	dir->names[0] = talloc_strdup(dir, pattern);
+	if (!dir->names[0]) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	dir->count = 1;
+
+	return NT_STATUS_OK;
+}
+
+/*
+  read a directory and find all matching file names, returning them in
+  the structure *dir. The returned names are relative to the directory
+
+  if the pattern matches no files then we return NT_STATUS_OK, with dir->count = 0
+*/
+NTSTATUS pvfs_list(struct pvfs_state *pvfs, struct pvfs_filename *name, struct pvfs_dir *dir)
+{
+	DIR *odir;
+	struct dirent *dent;
+	uint_t allocated = 0;
+	char *pattern;
+
+	/* split the unix path into a directory + pattern */
+	pattern = strrchr(name->full_name, '/');
+	if (!pattern) {
+		/* this should not happen, as pvfs_unix_path is supposed to 
+		   return an absolute path */
+		return NT_STATUS_UNSUCCESSFUL;
+	}
+
+	*pattern++ = 0;
+
+	if (!name->has_wildcard) {
+		return pvfs_list_no_wildcard(pvfs, name, pattern, dir);
+	}
+	
+	dir->count = 0;
+	dir->unix_path = name->full_name;
+	dir->names = talloc(dir, 0);
+	if (!dir->names) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	odir = opendir(name->full_name);
+	if (!odir) { 
+		return pvfs_map_errno(pvfs, errno); 
+	}
+
+	while ((dent = readdir(odir))) {
+		uint_t i = dir->count;
+		const char *dname = dent->d_name;
+
+		/* check it matches the wildcard pattern */
+		if (ms_fnmatch(pattern, dname, PROTOCOL_NT1) != 0) {
+			continue;
+		}
+		
+		if (dir->count >= allocated) {
+			allocated = (allocated + 100) * 1.2;
+			dir->names = talloc_realloc_p(dir->names, const char *, allocated);
+			if (!dir->names) { 
+				closedir(odir);
+				return NT_STATUS_NO_MEMORY;
+			}
+		}
+
+		dir->names[i] = talloc_strdup(dir, dname);
+		if (!dir->names[i]) { 
+			closedir(odir);
+			return NT_STATUS_NO_MEMORY;
+		}
+		
+		dir->count++;
+	}
+
+	closedir(odir);
+
+	return NT_STATUS_OK;
+}
+