helpThe GNU Bourne-Again SHell - Support: sr #109667, unexpected exit value from...

 
 

sr #109667: unexpected exit value from "jobs"

Submitted by:  Brian K. White <bkw>
Submitted on:  Wed 03 Apr 2019 08:23:18 PM UTC  
 
Category:  None Priority:  5 - Normal
Severity:  3 - Normal Status:  Done
Privacy:  Public Assigned to:  None
Open/Closed:  Open Operating System:  GNU/Linux

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Tue 09 Apr 2019 02:19:37 PM UTC, comment #1: 

Thanks for the report. I agree that `jobs' in an interactive shell should count as notifying the user of a job's status and cause it to be removed from the jobs table.

Chet Ramey <chet>
Project Administrator
Wed 03 Apr 2019 08:23:18 PM UTC, original submission:  

In the following 2 examples, I believe the only relevant difference is:

In the working example, there is at least one external command somewhere in the while loop. ("sleep 1")

In the non-working example, there are no external commands anywhere in the while loop. ("sleep 1" is replaced with "read -t1")

The problem is that in the non-working example the condition of "jobs" returns true forever, even though the bg job has in fact gone away.

==Working==

bkw@negre:~$ sleep 5 &
[1] 8185
bkw@negre:~$ while jobs %% ;do echo . ;sleep 1 ;done
[1]+  Running                 sleep 5 &
.
[1]+  Running                 sleep 5 &
.
[1]+  Running                 sleep 5 &
.
[1]+  Running                 sleep 5 &
.
[1]+  Done                    sleep 5
bash: jobs: %%: no such job
bkw@negre:~$

==Not Working==

bkw@negre:~$ sleep 5 &
[1] 8182
bkw@negre:~$ while jobs %% ;do echo . ;read -t1 ;done
[1]+  Running                 sleep 5 &
.
[1]+  Running                 sleep 5 &
.
[1]+  Running                 sleep 5 &
.
[1]+  Running                 sleep 5 &
.
[1]+  Running                 sleep 5 &
.
[1]+  Done                    sleep 5
.
[1]+  Done                    sleep 5
.
[1]+  Done                    sleep 5
.
[1]+  Done                    sleep 5
.
[1]+  Done                    sleep 5
.
^C
bkw@negre:~$

Brian K. White <bkw>

 

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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-04-09 chet StatusNone => Done

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