11-30-2009
Generally: yes, status != 0 is sufficient, if I can be sure that status 0 isn't the only code returned, and without any documentation I assume the worst (I've seen too many tools always returning 0, no matter what).
But, knowing the operators that will have to use that script, sooner or later I'll have to give more information than just Success/Failure, and I'd rather get that information via a return code, that by parsing the command output, which could change without warning.
Besides, I'm sure I'm sooner or later someone will have a similar task, where the scripts execution path will depend on the failure reason.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have the below script I am running on a Solaris system to check the status of a Tivoli Workload Scheduler job and return the status. We need this script to return a '0' if any of the jobs in the stream are in a "EXEC" state and an "1" if in a "HOLD" state. I am not a programmer so I am not sure... (1 Reply)
Discussion started by: leezer1204
1 Replies
2. UNIX for Dummies Questions & Answers
Suppose I have a script which is monitoring a directory
whenever a file drops in that directory,it sends alert
say I want to write a return code for the above script
which on successful execution of script gives a return value
Based on return code , I want to do initiate some jobs in other... (1 Reply)
Discussion started by: abhib45
1 Replies
3. UNIX for Dummies Questions & Answers
Hi,
Can anyone tell me if there are return codes for SFTP? If so how would you capture them? I've tried 'man sftp' but its not particularly helpful.
Many thanks
Helen :confused: (4 Replies)
Discussion started by: Bab00shka
4 Replies
4. UNIX for Advanced & Expert Users
I have a simple script which renames a file.How do i capture the return code of the script if the script fails (3 Replies)
Discussion started by: kris01752
3 Replies
5. HP-UX
Can any body please tell me the return codes of RDIST tool?
I am using RDIST (through an UNIX script) to synchronize files between two servers say ukblx151(source) & ukapx050(target).
RDIST raises an alert mail (through notify option) in case of success & also failure but there is a problem if... (0 Replies)
Discussion started by: vishal_ranjan
0 Replies
6. Shell Programming and Scripting
Hi
In an unix script I am using an Perl one liner perl -i -ne '-----'
If the perl one liner fails i am not able to catch the return code.
It always give 0 as return code. Can you tell me how can i catch the return code
perl -i -ne '---'
RETCODE=$?
echo $RETCODE
Thanks and Regards
Ammu (2 Replies)
Discussion started by: ammu
2 Replies
7. UNIX for Dummies Questions & Answers
This is a high-level explanation, if more details are needed, please do not hesitate to ask.
I have a set of .ctl files which I want to execute:
AV1.ctl
AV2.ctl
AV3.ctl
I have a script which has a for loop in it:
for filename in AV1 AV2 AV3
do
. execute_another_script.sh
done
... (2 Replies)
Discussion started by: hern14
2 Replies
8. Shell Programming and Scripting
sftp -v b $putlist $SFTP_ID@TARGET_SERVER
How can I get a return code if fails to put the file?
sftp -v b $getlist $SFTP_ID@TARGET_SERVER
How can I get a return code if fails to put the file? (1 Reply)
Discussion started by: TimHortons
1 Replies
9. Shell Programming and Scripting
Hi,
I wanted to know the significance of different return codes when we do echo $?
I know when $? returns 0 the command has worked successfully.
but what does $? = 1, 2, 3 etc. signify.
Thanks in advance for the help !!! (3 Replies)
Discussion started by: aarti.popi
3 Replies
10. UNIX for Dummies Questions & Answers
Not sure if this is of any use but......
I was messing around with getting return codes greater than 255 for special usage...
Of course the code could be made simple but in this code the new stored return code
is generated as exit is progressing...
#!/bin/sh
# Real and imaginary return... (9 Replies)
Discussion started by: wisecracker
9 Replies
LEARN ABOUT DEBIAN
sleepenh
SLEEPENH(1) General Commands Manual SLEEPENH(1)
NAME
sleepenh - an enhanced sleep program.
SYNOPSIS
sleepenh [initial-time] sleep-time
DESCRIPTION
sleepenh is a program that can be used when there is a need to execute some functions periodically in a shell script. It was not designed
to be accurate for a single sleep, but to be accurate in a sequence of consecutive sleeps.
After a successful execution, it returns to stdout the timestamp it finished running, that can be used as initial-time to a successive exe-
cution of sleepenh.
OPTIONS
There are no command line options. Run it without any option to get a brief help and version.
ARGUMENTS
sleep-time is a real number in seconds, with microseconds resolution (1 minute, 20 seconds and 123456 microseconds would be 80.123456).
initial-time is a real number in seconds, with microseconds resolution. This number is system dependent. In GNU/Linux systems, it is the
number of seconds since midnight 1970-01-01 GMT. Do not try to get a good value of initial-time. Use the value supplied by a previous exe-
cution of sleepenh.
If you don't specify initial-time, it is assumed the current-time.
EXIT STATUS
An exit status greater or equal to 10 means failure. Known exit status:
0 Success.
1 Success. There was no need to sleep. (means that initial-time + sleep-time was greater than current-time).
10 Failure. Missing command line arguments.
11 Failure. Did not receive SIGALRM.
12 Failure. Argument is not a number.
13 Failure. System error, could not get current time.
USAGE EXAMPLE
Suppose you need to send the char 'A' to the serial port ttyS0 every 4 seconds. This will do that:
#!/bin/sh
TIMESTAMP=`sleepenh 0`
while true; do
# send the byte to ttyS0
echo -n "A" > /dev/ttyS0;
# just print a nice message on screen
echo -n "I sent 'A' to ttyS0, time now is ";
sleepenh 0;
# wait the required time
TIMESTAMP=`sleepenh $TIMESTAMP 4.0`;
done
HINT
This program can be used to get the current time. Just execute:
sleepenh 0
BUGS
It is not accurate for a single sleep. Short sleep-times will also not be accurate.
SEE ALSO
date(1), sleep(1).
AUTHOR
This manual page was written by Pedro Zorzenon Neto.
2008/04/20 SLEEPENH(1)