Date: Fri, 27 Jul 2007 08:11:21 GMT From: Ighighi <ighighi@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/114955: [PATCH]: support for mask, dirmask, uid, gid for mount_cd9660(8) / CD9660 Message-ID: <200707270811.l6R8BLX3024291@www.freebsd.org> Resent-Message-ID: <200707270820.l6R8K1be058152@freefall.freebsd.org>
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>Number: 114955
>Category: kern
>Synopsis: [PATCH]: support for mask,dirmask,uid,gid for mount_cd9660(8) / CD9660
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Fri Jul 27 08:20:01 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator: Ighighi
>Release: 6.2-STABLE
>Organization:
>Environment:
FreeBSD orion 6.2-STABLE FreeBSD 6.2-STABLE #0: Thu Jul 26 01:07:13 VET 2007 root@orion:/usr/obj/usr/src/sys/CUSTOM i386
>Description:
This patch adds arbitrary mask, dirmask, uid & gid support to ISO9660
ala MSDOSFS. It is necessary because legitimate data in CD-ROM and ISO
images may be inaccessible when ownership is assigned to root/wheel.
The mask/dirmask options let the user override the ugly 0555 permissions
of files where the executable bit makes no sense.
Successfully built & tested on 6.2-STABLE with patch to -CURRENT pending.
The mount_cd9660(8) in -CURRENT that uses nmount() instead of the old mount()
ran successfully too.
>How-To-Repeat:
>Fix:
To apply this patch, run:
patch -d /usr < /path/do/patch
Now, either rebuild the world and the kernel or run:
cd /usr/src/sys/modules/cd9660
make clean obj depend && make && make install clean
cp -f /sys/isofs/cd9660/iso.h /usr/include/isofs/cd9660/
cp -f /sys/isofs/cd9660/cd9660_mount.h /usr/include/isofs/cd9660/
cd /usr/src/sbin/mount_cd9660
make clean obj depend && make && make install clean
kldunload -v cd9660
kldload -v cd9660
Enjoy, you may use a line like this in /etc/fstab:
/dev/cdrom /media/cdrom cd9660 ro,noauto,nosuid,-m644,-M755 0 0
From the command line:
mount_cd9660 -o ro -m 660 -M 750 -U `whoami` -G staff /dev/cdrom ~/cdrom
Patch attached with submission follows:
#
# (!c) 2007 by Ighighi
#
# This patch adds arbitrary mask, dirmask, uid & gid support to ISO9660
# ala MSDOSFS. It is necessary because legitimate data in CD-ROM and ISO
# images may be inaccessible when ownership is assigned to root/wheel.
# The mask/dirmask options let the user override the ugly 0555 permissions
# of files where the executable bit makes no sense.
#
# Successfully built & tested on 6.2-STABLE
#
# To apply this patch, run:
# patch -d /usr < /path/do/patch
# Now, either rebuild the world and the kernel or run:
# cd /usr/src/sys/modules/cd9660
# make clean obj depend && make && make install clean
# cp -f /sys/isofs/cd9660/iso.h /usr/include/isofs/cd9660/
# cp -f /sys/isofs/cd9660/cd9660_mount.h /usr/include/isofs/cd9660/
# cd /usr/src/sbin/mount_cd9660
# make clean obj depend && make && make install clean
# kldunload -v cd9660
# kldload -v cd9660
#
# Enjoy, you may use a line like this in /etc/fstab:
# /dev/cdrom /media/cdrom cd9660 ro,noauto,nosuid,-m644,-M755 0 0
# From the command line:
# mount_cd9660 -o ro -m 660 -M 750 -U `whoami` -G staff /dev/cdrom ~/cdrom
#
--- src/sbin/mount_cd9660/mount_cd9660.c.orig 2005-06-10 05:51:41.000000000 -0400
+++ src/sbin/mount_cd9660/mount_cd9660.c 2007-07-25 01:19:30.000000000 -0400
@@ -59,8 +59,11 @@
#include <arpa/inet.h>
+#include <ctype.h>
#include <err.h>
#include <errno.h>
+#include <grp.h>
+#include <pwd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
@@ -80,6 +83,10 @@
MOPT_END
};
+static gid_t a_gid(const char *);
+static uid_t a_uid(const char *);
+static mode_t a_mask(const char *);
+
int get_ssector(const char *dev);
int set_charset(struct iso_args *, const char *);
void usage(void);
@@ -97,7 +104,7 @@
args.ssector = -1;
args.cs_disk = NULL;
args.cs_local = NULL;
- while ((ch = getopt(argc, argv, "begjo:rs:vC:")) != -1)
+ while ((ch = getopt(argc, argv, "begG:jm:M:o:rs:U:vC:")) != -1)
switch (ch) {
case 'b':
opts |= ISOFSMNT_BROKENJOLIET;
@@ -108,9 +115,21 @@
case 'g':
opts |= ISOFSMNT_GENS;
break;
+ case 'G':
+ args.gid = a_gid(optarg);
+ opts |= ISOFSMNT_GID;
+ break;
case 'j':
opts |= ISOFSMNT_NOJOLIET;
break;
+ case 'm':
+ args.fmask = a_mask(optarg);
+ opts |= ISOFSMNT_FMASK;
+ break;
+ case 'M':
+ args.dmask = a_mask(optarg);
+ opts |= ISOFSMNT_DMASK;
+ break;
case 'o':
getmntopts(optarg, mopts, &mntflags, &opts);
break;
@@ -120,6 +139,10 @@
case 's':
args.ssector = atoi(optarg);
break;
+ case 'U':
+ args.uid = a_uid(optarg);
+ opts |= ISOFSMNT_UID;
+ break;
case 'v':
verbose++;
break;
@@ -187,8 +210,8 @@
usage(void)
{
(void)fprintf(stderr,
-"usage: mount_cd9660 [-begjrv] [-C charset] [-o options] [-s startsector]\n"
-" special node\n");
+"usage: mount_cd9660 [-begjrv] [-C charset] [-G gid] [-m mask] [-M mask]\n"
+" [-o options] [-U uid] [-s startsector] special node\n");
exit(EX_USAGE);
}
@@ -258,3 +281,58 @@
return (0);
}
+
+static gid_t
+a_gid(const char *s)
+{
+ struct group *gr;
+ const char *gname;
+ gid_t gid;
+
+ if ((gr = getgrnam(s)) != NULL)
+ gid = gr->gr_gid;
+ else {
+ for (gname = s; *s && isdigit(*s); ++s);
+ if (!*s)
+ gid = atoi(gname);
+ else
+ errx(EX_NOUSER, "unknown group id: %s", gname);
+ }
+ return (gid);
+}
+
+static uid_t
+a_uid(const char *s)
+{
+ struct passwd *pw;
+ const char *uname;
+ uid_t uid;
+
+ if ((pw = getpwnam(s)) != NULL)
+ uid = pw->pw_uid;
+ else {
+ for (uname = s; *s && isdigit(*s); ++s);
+ if (!*s)
+ uid = atoi(uname);
+ else
+ errx(EX_NOUSER, "unknown user id: %s", uname);
+ }
+ return (uid);
+}
+
+static mode_t
+a_mask(const char *s)
+{
+ int done, rv;
+ char *ep;
+
+ done = 0;
+ rv = -1;
+ if (*s >= '0' && *s <= '7') {
+ done = 1;
+ rv = strtol(optarg, &ep, 8);
+ }
+ if (!done || rv < 0 || *ep)
+ errx(EX_USAGE, "invalid file mode: %s", s);
+ return (rv);
+}
--- src/sbin/mount_cd9660/mount_cd9660.8.orig 2005-02-13 18:25:16.000000000 -0400
+++ src/sbin/mount_cd9660/mount_cd9660.8 2007-07-25 01:17:27.000000000 -0400
@@ -42,8 +42,13 @@
.Nm
.Op Fl begjrv
.Op Fl C Ar charset
+.Op Fl G Ar gid
+.Op Fl L Ar locale
+.Op Fl m Ar mask
+.Op Fl M Ar mask
.Op Fl o Ar options
.Op Fl s Ar startsector
+.Op Fl U Ar uid
.Ar special node
.Sh DESCRIPTION
The
@@ -69,6 +74,37 @@
only the last one will be listed.)
In either case, files may be opened without explicitly stating a
version number.
+.It Fl G Ar group
+Set the group of the files in the file system to
+.Ar group .
+The default gid on non-Rockridge volumes is zero.
+.It Fl U Ar user
+Set the owner of the files in the file system to
+.Ar user .
+The default uid on non-Rockridge volumes is zero.
+.It Fl m Ar mask
+Specify the maximum file permissions for files
+in the file system.
+(For example, a
+.Ar mask
+of
+.Li 755
+specifies that, by default, the owner should have
+read, write, and execute permissions for files, but
+others should only have read and execute permissions.
+See
+.Xr chmod 1
+for more information about octal file modes.
+Only the nine low-order bits of
+.Ar mask
+are used.
+The default
+.Ar mask
+on non-Rockridge volumes is 755.
+.It Fl M Ar mask
+Specify the maximum file permissions for directories
+in the file system.
+See the previous option's description for details.
.It Fl j
Do not use any Joliet extensions included in the file system.
.It Fl o
--- src/sys/isofs/cd9660/cd9660_mount.h.orig 2005-01-06 18:18:23.000000000 -0400
+++ src/sys/isofs/cd9660/cd9660_mount.h 2007-07-24 02:03:11.000000000 -0400
@@ -41,6 +41,10 @@
struct iso_args {
char *fspec; /* block special device to mount */
struct export_args export; /* network export info */
+ uid_t uid; /* uid that owns ISO-9660 files */
+ gid_t gid; /* gid that owns ISO-9660 files */
+ mode_t fmask; /* file mask to be applied for files */
+ mode_t dmask; /* file mask to be applied for directories */
int flags; /* mounting flags, see below */
int ssector; /* starting sector, 0 for 1st session */
char *cs_disk; /* disk charset for Joliet cs conversion */
@@ -52,3 +56,8 @@
#define ISOFSMNT_NOJOLIET 0x00000008 /* disable Joliet Ext.*/
#define ISOFSMNT_BROKENJOLIET 0x00000010/* allow broken Joliet disks */
#define ISOFSMNT_KICONV 0x00000020 /* Use libiconv to convert chars */
+
+#define ISOFSMNT_UID 0x00000100 /* override uid */
+#define ISOFSMNT_GID 0x00000200 /* override gid */
+#define ISOFSMNT_FMASK 0x00000400 /* override mode for files */
+#define ISOFSMNT_DMASK 0x00000800 /* override mode for directories */
--- src/sys/isofs/cd9660/iso.h.orig 2005-12-14 05:20:30.000000000 -0400
+++ src/sys/isofs/cd9660/iso.h 2007-07-24 02:06:21.000000000 -0400
@@ -229,6 +229,11 @@
struct g_consumer *im_cp;
struct bufobj *im_bo;
+ uid_t im_uid;
+ gid_t im_gid;
+ mode_t im_fmask;
+ mode_t im_dmask;
+
int logical_block_size;
int im_bshift;
int im_bmask;
--- src/sys/isofs/cd9660/cd9660_node.c.orig 2006-03-12 17:50:02.000000000 -0400
+++ src/sys/isofs/cd9660/cd9660_node.c 2007-07-27 00:37:35.806317377 -0400
@@ -129,6 +129,7 @@
struct buf *bp2 = NULL;
struct iso_mnt *imp;
struct iso_extended_attributes *ap = NULL;
+ mode_t mode;
int off;
/* high sierra does not have timezone data, flag is one byte ahead */
@@ -179,6 +180,23 @@
}
if (bp2)
brelse(bp2);
+
+ mode = inop->inode.iso_mode & S_IFMT;
+ switch (mode) {
+ case S_IFDIR:
+ if (inop->i_mnt->im_flags & ISOFSMNT_DMASK)
+ inop->inode.iso_mode = mode | inop->i_mnt->im_dmask;
+ break;
+ case S_IFREG:
+ if (inop->i_mnt->im_flags & ISOFSMNT_FMASK)
+ inop->inode.iso_mode = mode | inop->i_mnt->im_fmask;
+ break;
+ }
+
+ if (inop->i_mnt->im_flags & ISOFSMNT_UID)
+ inop->inode.iso_uid = inop->i_mnt->im_uid;
+ if (inop->i_mnt->im_flags & ISOFSMNT_GID)
+ inop->inode.iso_gid = inop->i_mnt->im_gid;
}
/*
--- src/sys/isofs/cd9660/cd9660_vfsops.c.orig 2007-02-07 00:02:05.000000000 -0400
+++ src/sys/isofs/cd9660/cd9660_vfsops.c 2007-07-27 01:36:02.206613258 -0400
@@ -108,6 +108,10 @@
ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
ma = mount_arg(ma, "export", &args.export, sizeof args.export);
+ ma = mount_argf(ma, "uid", "%d", args.uid);
+ ma = mount_argf(ma, "gid", "%d", args.gid);
+ ma = mount_argf(ma, "mask", "%d", args.fmask);
+ ma = mount_argf(ma, "dirmask", "%d", args.dmask);
ma = mount_argsu(ma, "cs_disk", args.cs_disk, 64);
ma = mount_argsu(ma, "cs_local", args.cs_local, 64);
ma = mount_argf(ma, "ssector", "%u", args.ssector);
@@ -220,6 +224,7 @@
struct g_consumer *cp;
struct bufobj *bo;
char *cs_local, *cs_disk;
+ int v;
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
DROP_GIANT();
@@ -389,6 +394,23 @@
vfs_flagopt(mp->mnt_optnew, "nojoliet", &isomp->im_flags, ISOFSMNT_NOJOLIET);
vfs_flagopt(mp->mnt_optnew, "kiconv", &isomp->im_flags, ISOFSMNT_KICONV);
+ if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) {
+ isomp->im_flags |= ISOFSMNT_UID;
+ isomp->im_uid = v;
+ }
+ if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) {
+ isomp->im_flags |= ISOFSMNT_GID;
+ isomp->im_gid = v;
+ }
+ if (1 == vfs_scanopt(mp->mnt_optnew, "mask", "%d", &v)) {
+ isomp->im_flags |= ISOFSMNT_FMASK;
+ isomp->im_fmask = v & ACCESSPERMS;
+ }
+ if (1 == vfs_scanopt(mp->mnt_optnew, "dirmask", "%d", &v)) {
+ isomp->im_flags |= ISOFSMNT_DMASK;
+ isomp->im_dmask = v & ACCESSPERMS;
+ }
+
/* Check the Rock Ridge Extension support */
if (!(isomp->im_flags & ISOFSMNT_NORRIP)) {
if ((error = bread(isomp->im_devvp,
>Release-Note:
>Audit-Trail:
>Unformatted:
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