--- util-linux-2.12j/mount/mount.c.console 2004-12-10 12:32:57.887137495 -0500 +++ util-linux-2.12j/mount/mount.c 2004-12-10 12:43:06.136750656 -0500 @@ -97,14 +97,16 @@ #define MS_USER 0x20000000 #define MS_OWNER 0x10000000 #define MS_GROUP 0x08000000 +#define MS_PAMCONSOLE 0x04000000 #define MS_COMMENT 0x00020000 #define MS_LOOP 0x00010000 + /* Options that we keep the mount system call from seeing. */ -#define MS_NOSYS (MS_NOAUTO|MS_USERS|MS_USER|MS_COMMENT|MS_LOOP) +#define MS_NOSYS (MS_NOAUTO|MS_USERS|MS_USER|MS_COMMENT|MS_LOOP|MS_PAMCONSOLE) /* Options that we keep from appearing in the options field in the mtab. */ -#define MS_NOMTAB (MS_REMOUNT|MS_NOAUTO|MS_USERS|MS_USER) +#define MS_NOMTAB (MS_REMOUNT|MS_NOAUTO|MS_USERS|MS_USER|MS_PAMCONSOLE) /* Options that we make ordinary users have by default. */ #define MS_SECURE (MS_NOEXEC|MS_NOSUID|MS_NODEV) @@ -142,6 +144,8 @@ { "comment", 0, 0, MS_COMMENT}, /* fstab comment only (kudzu,_netdev)*/ /* add new options here */ + { "pamconsole", 0, 0, MS_PAMCONSOLE }, /* Allow users at console to mount */ + { "nopamconsole", 0, 1, MS_PAMCONSOLE }, /* Console user has no special privs */ #ifdef MS_NOSUB { "sub", 0, 1, MS_NOSUB }, /* allow submounts */ { "nosub", 0, 0, MS_NOSUB }, /* don't allow submounts */ @@ -265,7 +269,7 @@ *mask &= ~om->mask; else *mask |= om->mask; - if ((om->mask == MS_USER || om->mask == MS_USERS) + if ((om->mask == MS_USER || om->mask == MS_USERS || om->mask == MS_PAMCONSOLE) && !om->inv) *mask |= MS_SECURE; if ((om->mask == MS_OWNER || om->mask == MS_GROUP) @@ -554,7 +558,29 @@ } } - /* James Kehl came with a similar patch: + /* Red Hat patch: allow users at console to mount when fstab + contains the console option. This option should not be used + in a high security environment but is useful to give console + users the possibility of using locally attached devices + such as USB keychains and USB harddisks where it is now suitable + to give the console owner write access to the device node */ + if (*flags & MS_PAMCONSOLE) { + char *username; + char pamconsole_file_name[256]; + struct stat sb; + + username = getusername (); + + if (username != NULL) { + snprintf (pamconsole_file_name, sizeof (pamconsole_file_name), + "/var/run/console/%s", username); + if (stat (pamconsole_file_name, &sb) == 0) { + *flags |= MS_USER; + } + } + } + + /* James Kehl came with a similar patch: allow an arbitrary user to mount when he is the owner of the mount-point and has write-access to the device. This is even less secure. Let me skip it for the time being; @@ -570,7 +596,7 @@ *user = getusername(); } - *flags &= ~(MS_OWNER | MS_GROUP); + *flags &= ~(MS_OWNER | MS_GROUP | MS_PAMCONSOLE); } static int --- util-linux-2.12j/mount/umount.c.console 2004-12-10 12:32:57.885138115 -0500 +++ util-linux-2.12j/mount/umount.c 2004-12-10 12:44:51.494119742 -0500 @@ -546,7 +546,7 @@ umount_file (char *arg) { struct mntentchn *mc, *fs; const char *file, *options; - int fstab_has_user, fstab_has_users, fstab_has_owner, fstab_has_group; + int fstab_has_user, fstab_has_users, fstab_has_owner, fstab_has_group, fstab_has_pamconsole; int ok; file = canonicalize(arg); /* mtab paths are canonicalized */ @@ -608,13 +608,16 @@ fstab_has_users = contains(options, "users"); fstab_has_owner = contains(options, "owner"); fstab_has_group = contains(options, "group"); + fstab_has_pamconsole = contains(options, "pamconsole"); ok = 0; if (fstab_has_users) ok = 1; if (!ok && (fstab_has_user || fstab_has_owner || - fstab_has_group)) { + fstab_has_group || fstab_has_pamconsole)) { + char pamconsole_file_name[256]; + struct stat sb; char *user = getusername(); options = mc->m.mnt_opts; @@ -624,6 +627,14 @@ if (user && mtab_user && streq (user, mtab_user)) ok = 1; + + /*pam_console user check*/ + if (user && fstab_has_pamconsole) { + snprintf (pamconsole_file_name, sizeof (pamconsole_file_name), "/var/run/console/%s", user); + if (stat (pamconsole_file_name, &sb) == 0) { + ok = 1; + } + } } if (!ok) die (2, _("umount: only %s can unmount %s from %s"), --- util-linux-2.12j/mount/fstab.5.console 2004-09-28 10:13:42.000000000 -0400 +++ util-linux-2.12j/mount/fstab.5 2004-12-10 12:59:05.088744506 -0500 @@ -156,10 +156,10 @@ .BR nfs (5). Common for all types of file system are the options ``noauto'' (do not mount when "mount -a" is given, e.g., at boot time), ``user'' -(allow a user to mount), and ``owner'' -(allow device owner to mount), and ``comment'' +(allow a user to mount), ``owner'' +(allow device owner to mount), ``pamconsole'' (allow a user at the console to mount), and ``comment'' (e.g., for use by fstab-maintaining programs). -The ``owner'' and ``comment'' options are Linux-specific. +The ``owner'', ``pamconsole'' and ``comment'' options are Linux-specific. For more details, see .BR mount (8).