Date: Sun, 30 Sep 2001 01:12:50 +0100 From: Ian Dowse <iedowse@maths.tcd.ie> To: Jos Backus <josb@cncdsl.com> Cc: Kris Kennaway <kris@obsecurity.org>, freebsd-current@freebsd.org Subject: Re: mdmfs mount_mfs compatibility bug? Message-ID: <200109300112.aa88479@salmon.maths.tcd.ie> In-Reply-To: Your message of "Sat, 29 Sep 2001 16:38:40 -0701." <20010929163840.B629@lizzy.bugworks.com>
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In message <20010929163840.B629@lizzy.bugworks.com>, Jos Backus writes:
>>
>> This was fixed some time ago, I thought. Are you up to date?
>
>There was a commit to mdmfs.c in August.
>This is with yesterday's -current, sorry, should have mentioned that.
The "mount -t mfs" case doesn't work with mdmfs, because mount(8)
uses the filesystem name, not the mount_xxx program as argv[0]. I
had guessed this would be a problem when I read the commit message
for revision 1.7 of mdmfs.c, but then I forgot to mention it to
Dima.
Here is a patch that should help - it makes mdmfs accept "mount_mfs"
or "mfs" to trigger compatibility mode instead of mount_*.
Ian
Index: mdmfs.8
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sbin/mdmfs/mdmfs.8,v
retrieving revision 1.8
diff -u -r1.8 mdmfs.8
--- mdmfs.8 16 Aug 2001 07:43:16 -0000 1.8
+++ mdmfs.8 29 Sep 2001 23:50:29 -0000
@@ -304,9 +304,10 @@
flag,
or by starting
.Nm
-with
-.Li mount_
-at the beginning of its name
+with the name
+.Li mount_mfs
+or
+.Li mfs
(as returned by
.Xr getprogname 3 ) .
In this mode, only the options which would be accepted by
Index: mdmfs.c
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sbin/mdmfs/mdmfs.c,v
retrieving revision 1.7
diff -u -r1.7 mdmfs.c
--- mdmfs.c 16 Aug 2001 02:40:29 -0000 1.7
+++ mdmfs.c 29 Sep 2001 22:58:05 -0000
@@ -116,8 +116,9 @@
newfs_arg = strdup("");
mount_arg = strdup("");
- /* If we were started as mount_*, imply -C. */
- if (strncmp(getprogname(), "mount_", 6) == 0)
+ /* If we were started as mount_mfs or mfs, imply -C. */
+ if (strcmp(getprogname(), "mount_mfs") == 0 ||
+ strcmp(getprogname(), "mfs") == 0)
compat = true;
while ((ch = getopt(argc, argv,
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