10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a sample server name listed in variable as below:
I need to check if the 7th character on $var is number 1
whichenv=`echo "$var"| head -c 7 | tail -c 1`
if ]; then
echo "9 found"
echo "9 Not Found"
This works... (3 Replies)
Discussion started by: mohtashims
2. UNIX for Beginners Questions & Answers
i am new here let me say HI for all.
now i have a question please:
i am sending one command to my machine to create 3 names.
if one of the names exists then the box return error message that already have the name but will continue to create the rests.
How i can break the command and... (7 Replies)
Discussion started by: Amiri
3. Shell Programming and Scripting
I am writing a menu driven program using shell script. THe script will be collecting data by logging into the other servers and bringing back the data to home server to process it and accordingly issue commands. TO automate commands execution , I am using expect script. However I am not able... (5 Replies)
Discussion started by: ashima jain
4. Shell Programming and Scripting
My doubt may be basic one but I need to get it clarified..
When i use "if" condition that checks for many AND, OR logical conditions
if ]; then
Even the if condition fails it returns as zero.. Any clue..
But if i add else condition like
if ]; ... (2 Replies)
Discussion started by: Priya Amaresh
5. UNIX for Dummies Questions & Answers
OS Environment: HP-UX B.11.31 U ia64
I am using the shell script code to connect to Oracle RAC database.
Passing the parameter of cluster database name.
typeset -l DB_ID=$1
+ typeset -l DB_ID=sivDB
#---- 3. SetDB validation -------------
if ; then
print... (3 Replies)
Discussion started by: Siva SQL
6. Shell Programming and Scripting
After my if condtion give rusult true then script should stop execution.
Please advice...Thnaks in advance (1 Reply)
Discussion started by: vivek1489
7. Shell Programming and Scripting
I am stuch in a script where a for loop is running to execute some commands for some values.
Now my problem is i have to have an if condition that if the first iteration is successful then it has to exit the for loop otherwise it has to continue normally.
my code is this:
for... (5 Replies)
Discussion started by: usha rao
8. Shell Programming and Scripting
Guys any tips on printing a certain error message to stderr and exiting should a command fail within a ksh script? I'm trying to null some output files.
Touch isn't suitable as i need to null them.
print "" > file isn't suitable as i need to check elsehere for if they are 0bytes or not.
... (5 Replies)
Discussion started by: lavascript
9. Shell Programming and Scripting
i m trying to run a shell script automatically , some time it works fine but some time it fails , what could be the problem .
If anybody have an idea about this problem then reply .
Thanks in advacne (4 Replies)
Discussion started by: tahir23
10. Shell Programming and Scripting
I have automate some process on unix through sehll script .
but i don't know there is some problem in scripts, some time shell script works and some time it fails. so my query is that "Why shell script fails some times?"
thanks (4 Replies)
Discussion started by: tahir23
exit(1) User Commands exit(1)
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps
exit [ ( expr )]
exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of
the last command executed (an EOF will also cause the shell to exit.)
return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe-
exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the
The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches
for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to
jump to a label that occurs between a while or for built-in command and its corresponding end.
exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8
bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing
a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit
except for a shell which has the ignoreeof option (See set below) turned on.
return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the
least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return
is invoked while not in a function or a '.' script, then it is the same as an exit.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|Availability |SUNWcsu |
break(1), csh(1), ksh(1), sh(1), attributes(5)
SunOS 5.10 15 Apr 1994 exit(1)