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Bug 74167 - mkinitrd breaks on legal content of /etc/modules.conf
mkinitrd breaks on legal content of /etc/modules.conf
Product: Red Hat Linux
Classification: Retired
Component: mkinitrd (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Erik Troan
David Lawrence
Depends On:
  Show dependency treegraph
Reported: 2002-09-17 03:21 EDT by Michal Jaegermann
Modified: 2007-04-18 12:46 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2003-01-14 17:33:42 EST
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Simple patch to handle all legal /etc/modules.conf files in mkinitrd (1.59 KB, patch)
2002-09-17 03:23 EDT, Michal Jaegermann
no flags Details | Diff

  None (edit)
Description Michal Jaegermann 2002-09-17 03:21:39 EDT
Description of Problem:

'mkinitrd' is broken in such sense that it is unable to reasonably
handle even simple /etc/modules.conf conditional constructs like these:

if -f /lib/modules/`uname -r`/kernel/drivers/scsi/sym53c8xx_2/sym53c8xx_2.o
   alias scsi_hostadapter sym53c8xx_2
   alias scsi_hostadapter sym53c8xx

which is both legal and very reasonable in handling multiple kernels
with possibly different module lists.  This is a very simple example
and quite a bit more complicated are possible.

Instead of feeble attempts of parsing /etc/modules.conf in 'mkinitrd'
this script should rely on an output of 'modprobe -c' which _has_
to do that properly, and normalizes its output, or it is broken.

Attached simple patch is for version 3.3.10 but some variations of
it will apply all over.
Comment 1 Michal Jaegermann 2002-09-17 03:23:33 EDT
Created attachment 76345 [details]
Simple patch to handle all legal /etc/modules.conf files in mkinitrd
Comment 2 Michal Jaegermann 2002-09-17 03:38:13 EDT
Oops!  A space is missing. The patch should read

 options=$( /sbin/modprobe -c | grep "^options $module " | \

instead of 

 options=$( /sbin/modprobe -c | grep "^options $module" | \

or, alternatively, "$module" can be tested in a subseqent while-loop.
Comment 3 Michal Jaegermann 2002-09-17 11:31:27 EDT
Sigh!  This still will not work in general without adding to modprobe an
option to request a configuration for a specified kernel instead of the
current one.  This is not likely be very difficult and/or invasive.
Trying to reparse modules.conf correctly in a shell script likely will
be always a very dicey proposition.
Comment 4 Erik Troan 2003-01-14 17:33:42 EST
as you've noted, this is not going to be straightforward to fix. if the upstream
modutils folks decide to help out I'll add the support to mkinitrd

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