issue with simple script
I thought I had a tape issue.. Now its clear I have a script issue.
Below is a script I use to perform level 0 dumps on all mounted file
systems. The problem seems to be that when the script runs, it does
not run as root -- even though I am root when I run it. The goal is to
cron it, but as I was testing it I ran into some problems.
First, I can't set the MT variable as its listed below. I get an
permission denial on /dev/nrsa0. This makes no sense, since as root I
can issue the command fine. Moreover, the dump command itself fails
even thought it seems to be rendered syntactically correct. I echo'ed
all the generated commands just to make certain they are correct.
Here's the output of the script:
=
ppsrvx# ./l0dump.sh
./l0dump.sh: /dev/nrsa0: permission denied
comp off
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/ad0s1a
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da1s1d
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da0s1e
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da1s1e
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/ad0s1d
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da0s1d
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/ad0s1e
/dev/sa0 offline
==
notice the permission denied..
not also 'comp off' which SHOULD be rendered as
/usr/bin/mt -f /dev/nrsa0 comp off
but isn't.
I'm really stumped here.
Is there some reason why running these commands in a script would
fail, yet running them by hand works?
#!/bin/sh
AWK=/usr/bin/awk
DF=/bin/df
DMP=/sbin/dump
DEST=/dev/nrsa0
MT=/usr/bin/mt -f ${DEST}
MOPTS='weof 1'
DOPTS='-0u -a -b 64 -f '
# -b 64 is max, will never use large value
FSS=`${DF} | ${AWK} '/dev/ {print $1}'`
echo ${MT} 'comp off'
# echo ${MT} 'blocksize 512'
for FS in ${FSS} ;
do
echo ${DMP} ${DOPTS} ${DEST} ${FS}
# ${MT} ${MOPTS}
done
echo ${MT} '/dev/sa0 offline'
echo Please swap tapes on srvx | mail iddwb
--
David Bear
phone: 480-965-8257
fax:480-965-9189
College of Public Programs/ASU
Wilson Hall 232
Tempe, AZ 85287-0803
Beware the IP portfolio, everyone will be suspect of trespassing
___
[EMAIL PROTECTED] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: issue with simple script
On Mon, 15 Mar 2004 15:27:20 -0700
David Bear [EMAIL PROTECTED] wrote:
I thought I had a tape issue.. Now its clear I have a script issue.
Below is a script I use to perform level 0 dumps on all mounted file
systems. The problem seems to be that when the script runs, it does
not run as root -- even though I am root when I run it. The goal is to
cron it, but as I was testing it I ran into some problems.
First, I can't set the MT variable as its listed below. I get an
permission denial on /dev/nrsa0. This makes no sense, since as root I
can issue the command fine. Moreover, the dump command itself fails
even thought it seems to be rendered syntactically correct. I echo'ed
all the generated commands just to make certain they are correct.
For future reference, you can achieve the same effect with the -x
switch.
i.e. add -x to the first line of the script, or run the script with
sh -x l0dump.sh
Here's the output of the script:
=
ppsrvx# ./l0dump.sh
./l0dump.sh: /dev/nrsa0: permission denied
comp off
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/ad0s1a
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da1s1d
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da0s1e
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da1s1e
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/ad0s1d
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/da0s1d
/sbin/dump -0u -a -b 64 -f /dev/nrsa0 /dev/ad0s1e
/dev/sa0 offline
==
notice the permission denied..
not also 'comp off' which SHOULD be rendered as
/usr/bin/mt -f /dev/nrsa0 comp off
but isn't.
I'm really stumped here.
Is there some reason why running these commands in a script would
fail, yet running them by hand works?
#!/bin/sh
AWK=/usr/bin/awk
DF=/bin/df
DMP=/sbin/dump
DEST=/dev/nrsa0
MT=/usr/bin/mt -f ${DEST}
^^
I think this line is your problem. It's trying to set the variable MT
to /usr/bin/mt -f , then run the command ${DEST}. Of course, ${DEST}
isn't a command, it's a device, which isn't executable, which is why you
get permission denied.
I think that if you rewrite the line as the following, it'll do what you
want:
MT=/usr/bin/mt -f ${DEST}
-Chris
___
[EMAIL PROTECTED] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to [EMAIL PROTECTED]
