05-03-2011
They are both positional parameters. Variables that store all your arguments. Useful e.g. when you can loop through arguments.
Quote:
$@ is same as $*, but each parameter is a quoted string, that is, the parameters are passed on intact, without
interpretation or expansion. This means, among other things, that each parameter in the argument list
is seen as a separate word.
from Advanced bash scripting guide
Look here for examples:
Special Variable Types
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello there!
Here is my problem. I hope I can get some help about it.
I need to know how can I get the return code of an application in the Unix shell script.
The script is like below:
PREVIOUS STATEMENT & VARIABLES
sqlplus scott/tiger @$sqldir/$sqlscript
NEXT STATEMENT (Like... (7 Replies)
Discussion started by: Shaz
7 Replies
2. Shell Programming and Scripting
Hello,
I still have problems when trying to figure out if the status of an ftp was successful. I ftp to different types (nt, vax, unix, etc...) of machines. I am trying to write a universal script that will ftp a file and then check to see if the ftp was successful. I have tried the... (12 Replies)
Discussion started by: blt123
12 Replies
3. Shell Programming and Scripting
hi, I set the crontab to execute script A every 5 minutes from 9:00 am to 4:00 pm everyday, now at 12:00am I want to run another script if and only if all the previous runs of script A return OK, can anyone tell me how it could be done? thank you very very much! (4 Replies)
Discussion started by: mpang_
4 Replies
4. Shell Programming and Scripting
Hi all
below is a snippet of my perl codesystem ("scp -pq $dest_file $path");How i can i trap the return status? ie if the scp fails how can i know ? (2 Replies)
Discussion started by: new2ss
2 Replies
5. HP-UX
I have the question:
How return the exit code from then assign :
VAR=$(command ) for ex. VAR=$(ls ....)
VAREXIT=$?
echo $VAREXIT
VAREXIT is equal to 0 if the directory exist or not exist. WHI??
if i execute the command direct from line-command , the value of $? is different if... (1 Reply)
Discussion started by: ZINGARO
1 Replies
6. Shell Programming and Scripting
Hi all
I'm trying to evalute the return status of a function without much success. I've put a very basic example below to explain.
check_ok() works fine but when used within an if statement, it always returns true, whether it is true or false. I'm guessing it returns true as the function... (4 Replies)
Discussion started by: tig2810
4 Replies
7. Shell Programming and Scripting
Hello,
I have a C++ binary that runs in my perl script. But, Currently, the binary is doing a core dump and i want to capture the retrun status of the binary to report as an issue.
Can you please help me on this.
Thanks,
Sateesh (1 Reply)
Discussion started by: kotasateesh
1 Replies
8. Shell Programming and Scripting
Hello,
I have a C++ binary that runs in my perl script. But, Currently, the binary is doing a core dump and i want to capture the retrun status of the binary to report as an issue.
Can you please help me on this.
Thanks,
Sateesh (1 Reply)
Discussion started by: kotasateesh
1 Replies
9. Shell Programming and Scripting
i have to run set of commands
command1
command2
command3
command4
Now Whenever any of these command fails i should quit while capturing error message.
Is there a better way then checking for $? after each command. (1 Reply)
Discussion started by: vickylife
1 Replies
10. UNIX for Dummies Questions & Answers
there is something wrong with my system. when I do this:
diff file1 file1 && echo 1
the output is 1.
but
diff file1 file2 >/dev/null && echo 1
output nothing
while
diff file1 file2 >/dev/null || echo 1
shows 1.
the same with "grep" return status. they are both GNU utilities.... (5 Replies)
Discussion started by: phil518
5 Replies
shell(1F) FMLI Commands shell(1F)
NAME
shell - run a command using shell
SYNOPSIS
shell command [command] ...
DESCRIPTION
The shell function concatenate its arguments, separating each by a space, and passes this string to the shell ($SHELL if set, otherwise
/usr/bin/sh).
EXAMPLES
Example 1: A sample output of shell command.
Since the Form and Menu Language does not directly support background processing, the shell function can be used instead.
`shell "build prog > /dev/null &"`
If you want the user to continue to be able to interact with the application while the background job is running, the output of an exe-
cutable run by shell in the background must be redirected: to a file if you want to save the output, or to /dev/null if you don't want to
save it (or if there is no output), otherwise your application may appear to be hung until the background job finishes processing.
shell can also be used to execute a command that has the same name as an FMLI built-in function.
NOTES
The arguments to shell will be concatenate using spaces, which may or may not do what is expected. The variables set in local environments
will not be expanded by the shell because "local" means "local to the current process."
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
sh(1), attributes(5)
SunOS 5.10 5 Jul 1990 shell(1F)