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Bug 88061 - Serial TTYs in /etc/inittab confuse rc.sysinit
Summary: Serial TTYs in /etc/inittab confuse rc.sysinit
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: initscripts
Version: 9
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Bill Nottingham
QA Contact: Brock Organ
Depends On:
Blocks: 88540
TreeView+ depends on / blocked
Reported: 2003-04-05 02:10 UTC by Pete Toscano
Modified: 2014-03-17 02:35 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2003-06-17 23:03:50 UTC

Attachments (Terms of Use)
Patch to fix the regex on line 38 of /etc/rc.d/rc.sysinit (435 bytes, patch)
2003-04-05 02:27 UTC, Pete Toscano
no flags Details | Diff

Description Pete Toscano 2003-04-05 02:10:55 UTC
Description of problem:
I tried adding a serial console to my RH9 box.  Part of this involved adding the
following line to /etc/inittab:

S0:12345:respawn:/sbin/mingetty ttyS0

The for loop on line 38 of /etc/rc.d/rc.sysinit is driven by a grep piped to a sed:

grep '^[0-9]*.*respawn:/sbin/mingetty' /etc/inittab | sed 's/^.* \

It looks like the grep part is trying to pull out all the respawning mingetty
lines dealing with standard (non-serial) TTYs.  Unfortunately, the regex given
to grep doesn't quite work this way.  The above grep pulls out the S0 line too
and the piped-to sed starts outputs the following for the for-loop to iterate over:

S0:12345:respawn:/sbin/mingetty ttyS0

The pattern "^[0-9]*.*respawn:/sbin/mingetty" is as good as
"respawn:/sbin/mingetty" since the first "*" means there can be zero or more
digits at the beginning of the line.  I believe that intended pattern should be:


This will pull out ensure that all lines extracted will begin with at lest one

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Add "S0:12345:respawn:/sbin/mingetty ttyS0" to /etc/inittab
2. Reboot
Actual results:
Errors similar to this...
/etc/rc.d/rc.sysinit: line 39: /dev/ttyS0:12345:respawn:/sbin/mingetty: No such
file or directory
/etc/rc.d/rc.sysinit: line 42: [: ttyS0: integer expression expected

Expected results:
No errors.

Additional info:

Comment 1 Pete Toscano 2003-04-05 02:27:29 UTC
Created attachment 90919 [details]
Patch to fix the regex on line 38 of /etc/rc.d/rc.sysinit

Works for me.

Comment 2 Bill Nottingham 2003-04-07 21:12:53 UTC
Hm, yeah, actually, we don't set up serial consoles with mingetty here (we use
agetty), so we didn't see this.

Comment 3 Bill Nottingham 2003-06-17 23:03:50 UTC
This is changed differently in current code.

Comment 4 Bill Nottingham 2003-06-17 23:06:47 UTC
Will be in 7.25-1.

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