On Aug 29, 2007, at 1:54 PMAug 29, 2007, Giorgos Keramidas wrote:
On 2007-08-29 18:51, Wojciech Puchar
<[EMAIL PROTECTED]> wrote:
fragment from my test program (used for other thing but doesn't
matter)
/sbin/ping -i 0.5 -s 1450 -c 3 tested_host >/dev/null 2>/dev/null
if [ $? != 0 ];then
perform_action_if_doesnt_ping
fi
I'm not sure if '!=' is a 'portable' way to write sh(1) tests,
but you have a point there :-)
Rewriting this as:
#!/bin/sh
ping -i 0.5 -s 1450 -c 3 tested_host >/dev/null 2>&1
if test $? -eq 0 ; then
exit 0
fi
perform_action_if_doesnt_ping
may save you an extra indentation level too.
AFAIK, the != is evaluated by test, not sh.
-----
Eric F Crist
Secure Computing Networks
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