Hello,
I have a script which copies via scp several large files to a remote server. What I want is that even if someone hits CTRL-C, the scp commands continues till the end.
Here is what I wrote
The CTRL-C signal is correctly trapped but the problem is that the scp command is interrupted. Only a part of my file is copied.
Hello all,
How do I start a background process and save the process id to a file on my system. For example %wait 5 & will execute and print the process id. I can't figure out how to get it to a file. I've tried: > filename 0>filename 1>filename.
Any assistance is most appreciated.
Thanks,
Jim... (10 Replies)
my shell is /sbin/sh. i added stty susp '^Z' with the intention of being able to switch between foreground and background. but the result was strange.
i had 2 servers. one is sun the os is 8 and the other is hpux v11. both of them had the same shell. but on hpux, it works perfectly fine while... (9 Replies)
I wrote a ksh script for Helpdesk. I need to know how to disable ctrl-c,ctrl-z,ctrl-d..... so that helpdesk would not be able to get to system prompt :confused: (6 Replies)
how to trap the ctrl c in unix shell script
my script is running in while loop it should not be terminate with ctrl c.
if i press ctrl c while running script it shloud ignore the same.
please healp..........
thanks in advance (2 Replies)
I am trying to trap CTRL-C, now the program I call has it's own exit message, I think this is the problem ..
This is what I have now :
function dothis
{
echo 'you hit control-c'
exit
}
function settrap
{
trap dothis SIGINT
}
settrap
until false; do
./ITGRecv.exe
doneDoing this I... (2 Replies)
What I need to learn is how to use a script that launches background processes, and then kills those processes as needed.
The script successfully launches the script. But how do I check to see if the job exists before I kill it?
I know my problem is mostly failure to understand parameter... (4 Replies)
Hi All,
Although each line below seems to work by itself, I've been having trouble getting the Control-C trap working when I add the "|perl -pe..." to the end of the tail -f line, below.
(That |perl -pe statement basically just adds color to highlight the word "ERROR" while tailing a log... (2 Replies)
Hi,
I am using net::ftp for transferring files now i am trying in the same Linux server as a result ftp is very fast but if the server is other location (remote) then the file transferred will be time consuming.
So i want try putting FTP part as a background process. I am unaware how to do... (5 Replies)
Hi,
I have written a menu driven shell script in which as per the choice, I run the another script on background.
For eg:
1. get info
2)process info
3)modify info
All the operations have different scripts which i schedule in background using &.
However I wish to display the error... (0 Replies)
Hello:
Am trying to understand why the method #2 works but method #1 does not.
For both methods, sending CTRL+C should kill both the Parent script & all of the spanwd background procs.
Method #1:
==========================
#!/bin/sh
ctrl_c()
{
echo "** Trapped CTRL-C"
... (3 Replies)
Discussion started by: gilgamesh
3 Replies
LEARN ABOUT SUSE
sigtrap
sigtrap(3pm) Perl Programmers Reference Guide sigtrap(3pm)NAME
sigtrap - Perl pragma to enable simple signal handling
SYNOPSIS
use sigtrap;
use sigtrap qw(stack-trace old-interface-signals); # equivalent
use sigtrap qw(BUS SEGV PIPE ABRT);
use sigtrap qw(die INT QUIT);
use sigtrap qw(die normal-signals);
use sigtrap qw(die untrapped normal-signals);
use sigtrap qw(die untrapped normal-signals
stack-trace any error-signals);
use sigtrap 'handler' => &my_handler, 'normal-signals';
use sigtrap qw(handler my_handler normal-signals
stack-trace error-signals);
DESCRIPTION
The sigtrap pragma is a simple interface to installing signal handlers. You can have it install one of two handlers supplied by sigtrap
itself (one which provides a Perl stack trace and one which simply "die()"s), or alternately you can supply your own handler for it to
install. It can be told only to install a handler for signals which are either untrapped or ignored. It has a couple of lists of signals
to trap, plus you can supply your own list of signals.
The arguments passed to the "use" statement which invokes sigtrap are processed in order. When a signal name or the name of one of
sigtrap's signal lists is encountered a handler is immediately installed, when an option is encountered it affects subsequently installed
handlers.
OPTIONS
SIGNAL HANDLERS
These options affect which handler will be used for subsequently installed signals.
stack-trace
The handler used for subsequently installed signals outputs a Perl stack trace to STDERR and then tries to dump core. This is the
default signal handler.
die The handler used for subsequently installed signals calls "die" (actually "croak") with a message indicating which signal was caught.
handler your-handler
your-handler will be used as the handler for subsequently installed signals. your-handler can be any value which is valid as an
assignment to an element of %SIG. See perlvar for examples of handler functions.
SIGNAL LISTS
sigtrap has a few built-in lists of signals to trap. They are:
normal-signals
These are the signals which a program might normally expect to encounter and which by default cause it to terminate. They are HUP,
INT, PIPE and TERM.
error-signals
These signals usually indicate a serious problem with the Perl interpreter or with your script. They are ABRT, BUS, EMT, FPE, ILL,
QUIT, SEGV, SYS and TRAP.
old-interface-signals
These are the signals which were trapped by default by the old sigtrap interface, they are ABRT, BUS, EMT, FPE, ILL, PIPE, QUIT, SEGV,
SYS, TERM, and TRAP. If no signals or signals lists are passed to sigtrap, this list is used.
For each of these three lists, the collection of signals set to be trapped is checked before trapping; if your architecture does not
implement a particular signal, it will not be trapped but rather silently ignored.
OTHER
untrapped
This token tells sigtrap to install handlers only for subsequently listed signals which aren't already trapped or ignored.
any This token tells sigtrap to install handlers for all subsequently listed signals. This is the default behavior.
signal
Any argument which looks like a signal name (that is, "/^[A-Z][A-Z0-9]*$/") indicates that sigtrap should install a handler for that
name.
number
Require that at least version number of sigtrap is being used.
EXAMPLES
Provide a stack trace for the old-interface-signals:
use sigtrap;
Ditto:
use sigtrap qw(stack-trace old-interface-signals);
Provide a stack trace on the 4 listed signals only:
use sigtrap qw(BUS SEGV PIPE ABRT);
Die on INT or QUIT:
use sigtrap qw(die INT QUIT);
Die on HUP, INT, PIPE or TERM:
use sigtrap qw(die normal-signals);
Die on HUP, INT, PIPE or TERM, except don't change the behavior for signals which are already trapped or ignored:
use sigtrap qw(die untrapped normal-signals);
Die on receipt one of an of the normal-signals which is currently untrapped, provide a stack trace on receipt of any of the error-signals:
use sigtrap qw(die untrapped normal-signals
stack-trace any error-signals);
Install my_handler() as the handler for the normal-signals:
use sigtrap 'handler', &my_handler, 'normal-signals';
Install my_handler() as the handler for the normal-signals, provide a Perl stack trace on receipt of one of the error-signals:
use sigtrap qw(handler my_handler normal-signals
stack-trace error-signals);
perl v5.12.1 2010-04-26 sigtrap(3pm)