exit status of command in a pipe line Post: 302141346

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Top Forums UNIX for Dummies Questions & Answers exit status of command in a pipe line Post 302141346 by rakeshou on Thursday 18th of October 2007 06:08:19 PM

10-18-2007

Registered User

set -o pipefail not available on sunos, $PIPESTATUS works on bash not on ksh

Quote:

Originally Posted by radoulov

bash and ksh93 have the pipefail option:

Code:

bash 3.2.25(17)$ ls x|tail
ls: cannot access x: No such file or directory
bash 3.2.25(17)$ echo $?
0
bash 3.2.25(17)$ set -o pipefail
bash 3.2.25(17)$ ls x|tail
ls: cannot access x: No such file or directory
bash 3.2.25(17)$ echo $?
2

bash and zsh have the PIPESTATUS/pipestatus array/variable:

Code:

bash 3.2.25(17)$ ls x|tail
ls: cannot access x: No such file or directory
bash 3.2.25(17)$ echo $PIPESTATUS
2
bash 3.2.25(17)$ ls x|tail
ls: cannot access x: No such file or directory
bash 3.2.25(17)$ echo ${PIPESTATUS[@]}
2 0

Code:

zsh 4.3.4% ls x|tail
ls: cannot access x: No such file or directory
zsh 4.3.4% echo $pipestatus
2 0

set -o pipefail doesnt seem to work on SunOS 5.8

Code:

bash-2.03$ uname
SunOS
bash-2.03$ set -o pipefail
bash: set: pipefail: unknown option name

echo $PIPESTATUS works on bash but not on ksh

Code:

bash-2.05$ ls -l rakesh | tail -5
rakesh: No such file or directory
bash-2.05$ echo $PIPESTATUS
2

rakeshou

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