Hello,
I am experiencing an unexpected behavior when using "builtin jobs -l". It
seems that it's output fd is not as same as "jobs -l" without the builtin
prefix. So when I piped it into wc, I got different results (as seen in the
code I pasted below).
Bash version: GNU bash, version 4.3.43(1)-release (x86_64-redhat-linux-gnu)
OS: Fedora 25, kernel 4.9.13-200.fc25.x86_64
Buggy behavior:
when we have one or more background processes:
jobs -l | wc # produces 0 0 0
builtin -l | wc # produces non-zero non-zero non-zero
I tried to fix the bug, but after I looked at the code, the jobs printing
procedure clearly prints to stdout. So I think it's not a easy work to
track down the bug.
Way to reproduce:
bash-4.3$
bash-4.3$ enable -a | grep jobs
enable jobs
bash-4.3$ cat
^Z
[1]+ Stopped cat
bash-4.3$ jobs -l
[1]+ 14030 Stopped cat
bash-4.3$ jobs -l | wc
1 4 39
bash-4.3$ builtin jobs -l | wc
0 0 0
bash-4.3$ type jobs
jobs is a shell builtin
bash-4.3$ type -a jobs
jobs is a shell builtin
jobs is /usr/bin/jobs
jobs is /bin/jobs
bash-4.3$
Thank you!
Sincerely,
Hengyang
--
Hengyang Zhao
Ph.D. Candidate, Electrical Engineering
University of California, Riverside
