How to know the Exit status of a executable in HP Unix through PERL

[CA1490051]

Hi All,

Can any one please help me to solve the below problem.

I have a perl script. In the Perl script i am executing a "a.out" file using the system("./a.out").

But, I want to check whether the a.out terminated normally without causing any "Bus Error" or "Segmentation Fault".

CAn i do this using "$?". If yes what will be the exit status for normal execution. And does this exit status differ for different flavours of UNIX like Linux and SunOs.

thanks in advance
regards
Vikram

[James R. Ferguson · Accepted solution]

Hi Vikram:

To obtain the exit value you need to examine the high eight bits of the value returned:

Hence:

# perl -le '$rc=system("/usr/bin/cp");print "exit status = ",$rc>>8'

1

...looks just like you did:

# /usr/bin/cp; echo $?
1

Regards!

...JRF...

[Ralph Grothe]

The explanation can be found in either

perldoc -f system

or

perldoc perlvar

if you look for $?

[Ralph Grothe]

The explanation can be found in either

perldoc -f system

or

perldoc perlvar

if you look for $?

Except for SIGKILL and SIGSTOP you can implement a signal handler by assigning the special Perl hash %SIG a code ref to the appropriate key which is the respective signal name without the prefix SIG.
Details to %SIG may also be found in perldoc perlvar.

[Ralph Grothe]

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