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authorMichael I. Bushnell <mib@gnu.org>1996-01-18 19:20:57 +0000
committerMichael I. Bushnell <mib@gnu.org>1996-01-18 19:20:57 +0000
commit7a147133677da8733a2b787b740d8a4e2d6827f4 (patch)
tree59e3cb510d3d2015c5d2689a6dfe8d368f8cb457 /libnetfs/fsys-getroot.c
parent67a07fc35eba65dff96b48e123d27870788b943e (diff)
Formerly fsys-getroot.c.~2~
Diffstat (limited to 'libnetfs/fsys-getroot.c')
-rw-r--r--libnetfs/fsys-getroot.c72
1 files changed, 69 insertions, 3 deletions
diff --git a/libnetfs/fsys-getroot.c b/libnetfs/fsys-getroot.c
index d70a42e5..ef870857 100644
--- a/libnetfs/fsys-getroot.c
+++ b/libnetfs/fsys-getroot.c
@@ -20,6 +20,8 @@
#include "netfs.h"
#include "fsys_S.h"
+#include "misc.h"
+#include <fcntl.h>
error_t
netfs_S_fsys_getroot (mach_port_t cntl,
@@ -35,14 +37,78 @@ netfs_S_fsys_getroot (mach_port_t cntl,
struct port_info *pt = ports_lookup_port (netfs_port_bucket, cntl,
netfs_control_class);
struct netcred *cred;
-
+ error_t err;
+ struct protid *newpi;
+ mode_t type;
+
if (!pt)
return EOPNOTSUPP;
+ ports_port_deref (pt);
cred = netfs_make_credential (uids, nuids, gids, ngids);
flags &= O_HURD;
mutex_lock (&netfs_root_node->lock);
- netfs_validate_stat (netfs_root_node);
- type =
+ err = netfs_validate_stat (netfs_root_node, cred);
+ if (err)
+ goto out;
+
+ type = netfs_root_node->nn_stat.st_mode & S_IFMT;
+
+ if (type == S_IFLNK && !(flags & (O_NOLINK | O_NOTRANS)))
+ {
+ char pathbuf[netfs_root_node->nn_stat.st_size + 1];
+
+ err = netfs_attempt_readlink (cred, netfs_root_node, pathbuf);
+
+ mutex_unlock (&netfs_root_node->lock);
+ if (err)
+ goto out;
+
+ if (pathbuf[0] == '/')
+ {
+ *do_retry = FS_RETRY_MAGICAL;
+ *retry_port = MACH_PORT_NULL;
+ *retry_port_type = MACH_MSG_TYPE_COPY_SEND;
+ strcpy (retry_name, pathbuf);
+ mach_port_deallocate (mach_task_self (), dotdot);
+ return 0;
+ }
+ else
+ {
+ *do_retry = FS_RETRY_REAUTH;
+ *retry_port = dotdot;
+ *retry_port_type = MACH_MSG_TYPE_MOVE_SEND;
+ strcpy (retry_name, pathbuf);
+ return 0;
+ }
+ }
+
+ if ((type == S_IFSOCK || type == S_IFBLK || type == S_IFCHR
+ || type == S_IFIFO) && (flags & (O_READ|O_WRITE|O_EXEC)))
+ return EOPNOTSUPP;
+
+ err = netfs_check_open_permissions (cred, netfs_root_node, flags, 0);
+ if (err)
+ goto out;
+
+ flags &= ~OPENONLY_STATE_MODES;
+
+ newpi = netfs_make_protid (netfs_make_peropen (netfs_root_node, flags,
+ dotdot),
+ cred);
+ mach_port_deallocate (mach_task_self (), dotdot);
+ *do_retry = FS_RETRY_NORMAL;
+ *retry_port = ports_get_right (newpi);
+ *retry_port_type = MACH_MSG_TYPE_MAKE_SEND;
+ retry_name[0] = '\0';
+ ports_port_deref (newpi);
+
+ out:
+ mutex_unlock (&netfs_root_node->lock);
+ return err;
+}
+
+
+