If the previous method looks bizarre to you, here's another method discussed in the Perl FAQ:
Code:
#!/usr/bin/perl
use IO::Handle;
{
local *STDOUT;
local *STDERR;
local *FILE;
open FILE, ">log.txt" || die "Cannot write to log file!";
open STDOUT, ">&FILE" || die "Cannot redirect STDOUT";
open STDERR, ">&FILE" || die "Cannot redirect STDOUT";
STDOUT->autoflush(1);
STDERR->autoflush(1);
print STDOUT "A\n";
print STDERR "B\n";
}
print STDOUT "C\n";
print STDERR "D\n";
I have problems with this autoflush() on socket I/O so I tend to avoid it most of the time, but in this case it just seems to work quite well.
As always, there are a lot of ways to do the same thing in Perl.
Hi All,
Can anyone please let me know the syntax / how to pick up the Return Code ( RC) from the mailx command and return it to SAS uisng 'system()' function and '${?}'.
I am in a process to send the mail automatically with an attachment to bulk users. I have used 'Mailx' and 'Unencode'... (0 Replies)
General Question: If a script calls multiple external programs (external to the script, but still on unix), where do the return codes go? Let's say one of external programs fails, does the entire script fail and send a non-zero return code to the job scheduling software, or is the return code sent... (1 Reply)
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)
Hi,
I have a unix shell script which is launching multiple java processes by calling a java class in a loop, but each time with a different set of parameters.
Now I have to use the return code from each process in the script later.
but how do i obtain the return code from each process... (1 Reply)
Hi,
I have a script which does something like the below:
execute_some_script.sh $arg1 $arg2 `exec-some-cmd`
if then;
do something
else
do something else
fi
However, during some cases, there is an error saying:
line xxx: [: too many arguments
at the line number which has... (5 Replies)
Hi,
I need to retrun multiple values
function errorFileCreation
{
echo "Before"
return -1 "Siva";
echo "Aftyer"
}
echo ${?} - This can be used to getting first value.
how can i get second one.
Advance Thanks...
Shiv (3 Replies)
HI,
Please help me on this. I have to execute 100 scripts which i have redirected in to a file . I want to pause the script after first execution and once i say enter key word it has to go to next execution. My looks like
for RUNFILES in `cat ${SOURCEFILES}/scripts`
do
echo $RUNFILES;
... (1 Reply)
I wrote this script
#!/bin/bash
var=`du -sch /var/log/messages;du -sch /var/log/maillog`
echo $var
I am getting result as follows.
# sh my.sh
2.1M /var/log/messages 2.1M total 296K /var/log/maillog 296K total
I need it like below
2.1M /var/log/messages
296K... (3 Replies)
when it runs and look at my acron.log file it generates an error as below
/tmp/prog.sh: line 4: (12 Replies)
Discussion started by: azherkn3
12 Replies
LEARN ABOUT PHP
shift
shift(1) User Commands shift(1)NAME
shift - shell built-in function to traverse either a shell's argument list or a list of field-separated words
SYNOPSIS
sh
shift [n]
csh
shift [variable]
ksh
* shift [n]
DESCRIPTION
sh
The positional parameters from $n+1 ... are renamed $1 ... . If n is not given, it is assumed to be 1.
csh
The components of argv, or variable, if supplied, are shifted to the left, discarding the first component. It is an error for the variable
not to be set or to have a null value.
ksh
The positional parameters from $n+1 $n+1 ... are renamed $1 ..., default n is 1. The parameter n can be any arithmetic expression that
evaluates to a non-negative number less than or equal to $#.
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
performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), ksh(1), sh(1), attributes(5)SunOS 5.10 15 Apr 1994 shift(1)
06-20-2005
