From 8766dbc4f3a810197c7c4b36183b8c8e927cd0da Mon Sep 17 00:00:00 2001
From: "Michael I. Bushnell" <mib@gnu.org>
Date: Wed, 17 Jul 1996 01:13:22 +0000
Subject: (trivfs_modify_stat): Fill in st->st_mode, st->st_uid, and st->st_gid
ourselves. (trivfs_S_file_chown): New routine, to override trivfs default.
(trivfs_S_file_chmod): Likewise.
---
term/users.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 101 insertions(+), 1 deletion(-)
(limited to 'term/users.c')
diff --git a/term/users.c b/term/users.c
index ac2d4d6b..9c7fadbc 100644
--- a/term/users.c
+++ b/term/users.c
@@ -292,7 +292,9 @@ trivfs_modify_stat (struct trivfs_protid *cred, struct stat *st)
st->st_fsid = getpid ();
st->st_ino = 0;
st->st_mode &= ~S_IFMT;
- st->st_mode |= S_IFCHR;
+ st->st_mode = term_mode;
+ st->st_uid = term_owner;
+ st->st_gid = term_group;
}
/* Implement term_getctty as described in <hurd/term.defs>. */
@@ -409,6 +411,104 @@ S_term_open_ctty (mach_port_t arg,
return err;
}
+/* Implement chown locally; don't pass the value down to the
+ underlying node. */
+error_t
+trivfs_S_file_chown (struct trivfs_protid *cred,
+ mach_port_t reply,
+ mach_msg_type_name_t reply_type,
+ uid_t uid,
+ gid_t gid)
+{
+ int i;
+ int noticed_uid;
+
+ /* This routine is flawed in several ways; it needs to
+ be rewritted once the idvec handling stuff can do
+ permission checks. */
+
+ if (!cred)
+ return EOPNOTSUPP;
+
+ noticed_uid = 0;
+ mutex_lock (&global_lock);
+ for (i = 0; i < cred->nuids; i++)
+ {
+ if (cred->uids[i] == uid)
+ noticed_uid = 1;
+ if (cred->uids[i] == 0 || cred->uids[i] == term_owner)
+ {
+ /* Make sure UID is legitimate */
+ if (!cred->isroot && !noticed_uid && term_owner != uid)
+ {
+ /* Continue scanning UIDS */
+ for (i++; i < cred->nuids; i++)
+ if (cred->uids[i] == uid)
+ noticed_uid = 1;
+ if (!noticed_uid)
+ {
+ mutex_unlock (&global_lock);
+ return EPERM;
+ }
+ }
+
+ /* Make sure GID is legitimate */
+ for (i = 0; i < cred->ngids; i++)
+ if (cred->gids[i] == gid || cred->isroot)
+ {
+ /* Make the change */
+ term_owner = uid;
+ term_group = gid;
+ mutex_unlock (&global_lock);
+ return EPERM;
+ }
+
+ /* Not legitimate */
+ break;
+ }
+ }
+
+ mutex_unlock (&global_lock);
+ return EPERM;
+}
+
+/* Implement chmod locally */
+error_t
+trivfs_S_file_chmod (struct trivfs_protid *cred,
+ mach_port_t reply,
+ mach_msg_type_name_t reply_type,
+ mode_t mode)
+{
+ int i;
+
+ if (!cred)
+ return EOPNOTSUPP;
+
+ for (i = 0; i < cred->nuids; i++)
+ if (cred->isroot || cred->uids[i] == term_owner)
+ {
+ if (!cred->isroot)
+ {
+ mode &= S_ISVTX;
+
+ for (i = 0; i < cred->nuids; i++)
+ if (cred->uids[i] == term_owner)
+ break;
+ if (i == cred->nuids)
+ mode &= ~S_ISUID;
+
+ for (i = 0; i < cred->ngids; i++)
+ if (cred->gids[i] == term_group)
+ break;
+ if (i == cred->nuids)
+ mode &= ~S_ISGID;
+ }
+
+ term_mode = (mode | S_IFCHR);
+ }
+}
+
+
/* Called for user writes to the terminal as described
in <hurd/io.defs>. */
error_t
--
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