ML9.1 here.
When I type in a Konsole
"cat /var/lock/subsys/dm"
no output is generated (dm containing the pid number of process prefdm)
to the Konsole.
But when I type
"kill `cat /var/lock/subsys/dm"
the process is effectively killed.
I found this command in /etc/rc.d/init.d/dm:
" stop)
gprintf "Stopping display manager: "
if [ -r /var/lock/subsys/dm ]; then
kill `cat /var/lock/subsys/dm` > /dev/null 2>&1
"
It took me a while to figure out that "cat" wouldn't print the content
of a file to the Konsole(standard output) if that content consist only
of a number. If that number is followed by a space in that file "cat"
shows "number " on the Konsole.
But if I type "cat /var/lock/subsys/dm > test.txt" the number is
copied to test.txt. And in the command "kill `cat /var/lock/subsys/dm"
the number is correctly presented to the "kill" command.
Why this behaviour for "cat" ? "info cat" gives me no clue.
Is this a bug of "cat" or some sort of feature ?
vatbier
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