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Top Forums UNIX for Advanced & Expert Users Error due to unset variable - Solaris vs GNU Linux - Help needed Post 302886855 by neutronscott on Tuesday 4th of February 2014 04:07:51 AM
Old 02-04-2014
how does it "work" in Solaris? What does it do? What shell is that, it's terrible!

Code:
$ ksh --version
  version         sh (AT&T Research) 1993-12-28 s+
$ ksh -s <<'__EOF__'
echo "Abc" > $LOG_FILE
echo "Ret - $?"
__EOF__

ksh[1]: : cannot open
Ret - 1

bash does the same thing: bash: line 1: $LOG_FILE: ambiguous redirect

Do you really need to cover the case where LOG_FILE is unset? Perhaps write a wrapper function:

Code:
mute@thedoctor:~$ echo "Hello" > "${LOG_FILE:-/dev/null}"
mute@thedoctor:~$ echo $?
0

there, success every time. Smilie
 

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suspend(1)                                                         User Commands                                                        suspend(1)

NAME
suspend - shell built-in function to halt the current shell SYNOPSIS
sh suspend csh suspend ksh suspend DESCRIPTION
sh Stops the execution of the current shell (but not if it is the login shell). csh Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su. ksh Stops the execution of the current shell (but not if it is the login shell). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5) SunOS 5.10 15 Apr 1994 suspend(1)
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