summaryrefslogtreecommitdiff
path: root/lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib.c')
-rw-r--r--lib.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/lib.c b/lib.c
new file mode 100644
index 0000000..29af81f
--- /dev/null
+++ b/lib.c
@@ -0,0 +1,116 @@
+/* Hurd unionfs
+ Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+ Written by Moritz Schulte <moritz@duesseldorf.ccc.de>.
+
+ 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA. */
+
+#define _GNU_SOURCE
+
+#include <hurd/netfs.h>
+#include <error.h>
+#include <dirent.h>
+#include <errno.h>
+
+#include "lib.h"
+
+/* Lock, which must be held, during printing of debugging
+ messages. */
+struct mutex debug_msg_lock = MUTEX_INITIALIZER;
+
+/* Fetch directory entries for DIR; store the raw data as returned by
+ the dir_readdir RPC in *DIRENT_DATA and a list of pointers to the
+ dirent structures in *DIRENT_LIST. */
+error_t
+dir_entries_get (file_t dir,
+ char **dirent_data, struct dirent ***dirent_list)
+{
+ error_t err;
+ size_t data_size;
+ int entries_num;
+ char *data;
+
+ err = dir_readdir (dir, &data, &data_size, 0, -1, 0, &entries_num);
+ if (! err)
+ {
+ struct dirent **list;
+
+ list = malloc (sizeof (struct dirent *) * (entries_num + 1));
+ if (list)
+ {
+ struct dirent *dp;
+ int i;
+
+ for (i = 0, dp = (struct dirent *) data;
+ i < entries_num;
+ i++, dp = (struct dirent *) ((char *) dp + dp->d_reclen))
+ *(list + i) = dp;
+ *(list + i) = NULL;
+
+ *dirent_data = data;
+ *dirent_list = list;
+ }
+ else
+ err = ENOMEM;
+ }
+ return err;
+}
+
+/* Lookup the file named NAME beneath DIR (or the cwd, if DIR is not a
+ valid port. Try to open with FLAGS0 first, and if that fails with
+ FLAGS1; MODE is the mode to user for newly created files. On
+ success, stat the looked up port and store it in *PORT, the
+ according stat information are stored in *STAT. */
+error_t
+file_lookup (file_t dir, char *name, int flags0, int flags1,
+ int mode, file_t *port, struct stat *stat)
+{
+ error_t err;
+ file_t p;
+ struct stat s;
+
+ file_t do_file_lookup (file_t d, char *n, int f, int m)
+ {
+ if (port_valid (d))
+ p = file_name_lookup_under (d, n, f, m);
+ else if (errno == EACCES)
+ p = file_name_lookup (n, f, m);
+ return p;
+ }
+
+ p = do_file_lookup (dir, name, flags0, mode);
+ if (! port_valid (p))
+ p = do_file_lookup (dir, name, flags1, mode);
+
+ if (port_valid (p))
+ {
+ if (stat)
+ {
+ err = io_stat (p, &s);
+ if (err)
+ port_dealloc (p);
+ }
+ }
+ else
+ err = errno;
+
+ if (! err)
+ {
+ *port = p;
+ if (stat)
+ *stat = s;
+ }
+ return err;
+}