08-18-2008
returning from a function
Hi all,
I am very new to BASH shell programming. I need to return an integer from a function to the caller function. I did this:
Quote:
#!/bin/bash
function func {
ret=5543
echo "Return code should be 5543"
return $ret
}
func
echo $?
but it keeps giving me wrong return:
Quote:
alirezan@lxb402 /van/work/ip/alirezan/winchester $ ./t
Return code should be 5543
167
Can someone help me out here, please?
Thanks
10 More Discussions You Might Find Interesting
1. Programming
I have two string returning function in ESQL/C
char *segment_name(lbuffer)
char *lbuffer;
{.....
and
char *get_bpdvalue(f_name)
char *f_name;
{......
both declared above main()
char *get_bpdvalue();
char *segment_name();
my problem is segment_name works on sprintf and strcpy... (5 Replies)
Discussion started by: jisc
5 Replies
2. Programming
hi all,
my requirement is to create a thread by calling another function.
i.e i dont call pthread_create directly from main, but by calling another function (createThd - below ), from main.
Example:
void *thread_function(void *arg) { /* thread function */
int i;
rc =... (3 Replies)
Discussion started by: wolwy_pete
3 Replies
3. Programming
hi
how can I return multiple values from a C function. I tried the following:
#include <stdio.h>
void foo(int id, char *first_name, char *last_name)
{
/*
this is just an example to illustrate my problem... real code makes
use of the "id" parameter.
*/
first_name = (char... (8 Replies)
Discussion started by: Andrewkl
8 Replies
4. Shell Programming and Scripting
Hello all,
I would like to know if it is possible to return a the result of a boolean expression from a function like this
function()
{
# some code
return ||
}
and what will be the return value ?
Thank you for help. (6 Replies)
Discussion started by: dolphin06
6 Replies
5. Shell Programming and Scripting
Hi All
In my script, I can call on several functions. I have a logging function that is called by any of these functions. What I would like is some way of identifying which function I am using and pass this to the log function as some parameter.
Is there some built in command or way of... (3 Replies)
Discussion started by: kingpin2502
3 Replies
6. Programming
I am working on a C/Unix application from last 2 years which communicates with other systems using proprietary format of my client. We have a function written in C which returns integer, which is response from other system to the request message initiated by my system. This return value is then... (1 Reply)
Discussion started by: dpmore
1 Replies
7. Programming
I am working on the application in which I have to fetch values from the database and paste in url and send it to portal.
table=get_result("SELECT serialno,cas,Mode,FLC,TLC,location,CompName,CompCode,FG,FC,DispNo,TruckNo,LWbill,RRGPN,INVNO,DCN,RQTY,DQTY,SQTY,DDATE,RDATE,SDATE,TTIME FROM... (1 Reply)
Discussion started by: er.rohan88
1 Replies
8. Programming
Hi guys.
how a functions such fdopen, ... can return pointer?
are these functions use static memory(variables)? (6 Replies)
Discussion started by: majid.merkava
6 Replies
9. Programming
H friends,
As we know, a function returns a value and that value is saved somwhere. like
int Sum( int x, int y )
{
return x + y;
}
Total = Sum( 10, 20 );
The value 30 is saved in variable Total.
Now the question is, what int value does the function main return, and where is it... (5 Replies)
Discussion started by: gabam
5 Replies
10. Programming
Hi All,
I am using malloc function for allocating dynamic memory.
When I am using below code on Linux server its working fine, but When I am trying the same code on HP UNIX server its returning NULL.
below is a fragment of code in which it is giving problem.
tmp = (format_tree... (4 Replies)
Discussion started by: Taher Saifuddin
4 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)