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Shell Programming and Scripting
Help with getting a Ctrl-C trap working w/ a piped tail -f...
Post 302514149 by chatguy on Friday 15th of April 2011 01:08:38 AM
04-15-2011
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I've search the various posts in these forums, but have not come up with a solution to my problem.
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Hello,
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say i have a statement like this in a script
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Hi All,
I have ran one command tail -f <filename> to view newly appended text to that file. When i was done i pressed ctrl+c command to stop it but to my suprise it didn't work. I then tried top command and pressed ctrl+c and it worked fine and command aborted.
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Hi Folks -
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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"
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LEARN ABOUT FREEBSD
tpm
TPM(4) BSD Kernel Interfaces Manual TPM(4) NAME
tpm -- Trusted Platform Module SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device tpm Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): tpm_load="YES" In /boot/device.hints: hint.tpm.0.at="isa" hint.tpm.0.maddr="0xfed40000" hint.tpm.0.msize="0x5000" hint.tpm.1.at="isa" hint.tpm.1.maddr="0xfed40000" hint.tpm.1.msize="0x1000" DESCRIPTION
The tpm driver provides support for various trusted platform modules (TPM) that can store cryptographic keys. Supported modules: o Atmel 97SC3203 o Broadcom BCM0102 o Infineon IFX SLD 9630 TT 1.1 and IFX SLB 9635 TT 1.2 o Intel INTC0102 o Sinosun SNS SSX35 o STM ST19WP18 o Winbond WEC WPCT200 The driver can be configured to use an IRQ by providing a free ISA interrupt vector in /boot/device.hints. SEE ALSO
intro(4), device.hints(5), config(8) AUTHORS
The tpm driver was written by Michael Shalayeff and Hans-Joerg Hoexer. BSD
August 15, 2010 BSD