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authorRoland McGrath <roland@gnu.org>1999-11-13 23:52:38 +0000
committerRoland McGrath <roland@gnu.org>1999-11-13 23:52:38 +0000
commit0bd019279b29e72861ba57e6101afa5e6dafb3a5 (patch)
tree9c89dfd0f45958c30c82d3a5097cf5feaf96bd95 /hurd/hurdlookup.c
parent28f08f3fd1c20c4352746839c242d3a7776041a6 (diff)
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* Versions.def (libc): Move GLIBC_2.2 dependency from GLIBC_2.1.1 to
GLIBC_2.1.3. 1999-11-13 Roland McGrath <roland@baalperazim.frob.com>
Diffstat (limited to 'hurd/hurdlookup.c')
-rw-r--r--hurd/hurdlookup.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/hurd/hurdlookup.c b/hurd/hurdlookup.c
index 0714e4aa86..7e5f9afa99 100644
--- a/hurd/hurdlookup.c
+++ b/hurd/hurdlookup.c
@@ -429,6 +429,81 @@ __hurd_file_name_split (error_t (*use_init_port)
}
weak_alias (__hurd_file_name_split, hurd_file_name_split)
+/* This is the same as hurd_file_name_split, except that it ignores
+ trailing slashes (so *NAME is never ""). */
+error_t
+__hurd_directory_name_split (error_t (*use_init_port)
+ (int which, error_t (*operate) (file_t)),
+ file_t (*get_dtable_port) (int fd),
+ error_t (*lookup)
+ (file_t dir, char *name, int flags, mode_t mode,
+ retry_type *do_retry, string_t retry_name,
+ mach_port_t *result),
+ const char *file_name,
+ file_t *dir, char **name)
+{
+ error_t addref (file_t crdir)
+ {
+ *dir = crdir;
+ return __mach_port_mod_refs (__mach_task_self (),
+ crdir, MACH_PORT_RIGHT_SEND, +1);
+ }
+
+ const char *lastslash = strrchr (file_name, '/');
+
+ if (lastslash != NULL && lastslash[1] == '\0')
+ {
+ /* Trailing slash doesn't count. Look back further. */
+
+ /* Back up over all trailing slashes. */
+ while (lastslash > file_name && *lastslash == '/')
+ --lastslash;
+
+ /* Find the last one earlier in the string, before the trailing ones. */
+#if __GLIBC__ > 2 || __GLIBC_MINOR__ >= 2
+ lastslash = __memrchr (file_name, '/', lastslash - file_name);
+#else
+ /* Keep backing up, looking for a slash. */
+ do
+ if (lastslash == file_name)
+ {
+ /* Hit the start with no slash. */
+ lastslash = NULL;
+ break;
+ }
+ while (*lastslash-- != '/');
+#endif
+ }
+
+ if (lastslash != NULL)
+ {
+ if (lastslash == file_name)
+ {
+ /* "/foobar" => crdir + "foobar". */
+ *name = (char *) file_name + 1;
+ return (*use_init_port) (INIT_PORT_CRDIR, &addref);
+ }
+ else
+ {
+ /* "/dir1/dir2/.../file". */
+ char dirname[lastslash - file_name + 1];
+ memcpy (dirname, file_name, lastslash - file_name);
+ dirname[lastslash - file_name] = '\0';
+ *name = (char *) lastslash + 1;
+ return
+ __hurd_file_name_lookup (use_init_port, get_dtable_port, lookup,
+ dirname, 0, 0, dir);
+ }
+ }
+ else
+ {
+ /* "foobar" => cwdir + "foobar". */
+ *name = (char *) file_name;
+ return (*use_init_port) (INIT_PORT_CWDIR, &addref);
+ }
+}
+weak_alias (__hurd_directory_name_split, hurd_directory_name_split)
+
file_t
__file_name_lookup (const char *file_name, int flags, mode_t mode)
@@ -458,6 +533,19 @@ __file_name_split (const char *file_name, char **name)
}
weak_alias (__file_name_split, file_name_split)
+file_t
+__directory_name_split (const char *directory_name, char **name)
+{
+ error_t err;
+ file_t result;
+
+ err = __hurd_directory_name_split (&_hurd_ports_use, &__getdport, 0,
+ directory_name, &result, name);
+
+ return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
+}
+weak_alias (__directory_name_split, directory_name_split)
+
file_t
__file_name_lookup_under (file_t startdir,