[GoLUG] Piping, redirection and shellscipts: 3/5/2025 7pm Eastern Standard time

[Ron]

Steve Litt wrote on 2025-03-02 14:58:

> I've taken piping, redirection and shellscripts for granted the last 
> two decades.

Dave from YSAP.sh and of YouTube bash video fame has a timely 2 minute
video out:

> Get status of an entire Bash Pipeline with `PIPESTATUS` You Suck at
> Programming #048
> 
> https://www.youtube.com/watch?v=5wGgHViyokE


I've never heard of PIPESTATUS, just set -o pipefail, so again, in under 
2½ minutes, Dave has something new to learn.


Someone may want to mention these during the meeting.


Example - check if any process in a series of pipe lines failed:

# true | false | true | false | true
# echo $?
0

# true | false | true | false | true
# echo "${PIPESTATUS[*]}"
0 1 0 1 0


The 1s correspond to the falses, allowing for testing of the entire 
chain of results.