Package: zsh
Version: 5.3.1-3+b1
Severity: normal
File: /bin/zsh
Dear Maintainer,
After a stopped pipeline job is resumed via the 'bg' builtin command,
the status of every command in the pipeline except the first is
incorrectly displayed. For example:
stretch% sleep 10 | sleep 15 | sleep 20
^Z
zsh: suspended sleep 10 | sleep 15 | sleep 20
stretch% bg
[1] + continued sleep 10 | sleep 15 | sleep 20
stretch% jobs -l
[1] + 1556 running sleep 10 |
1557 unknown signal (core dumped) sleep 15 |
1558 unknown signal (core dumped) sleep 20
stretch%
The same thing happens regardless of what the commands are, as long as
there are at least two commands with a pipe petween them. Despite the
status, the jobs are definitely running:
stretch% cp /dev/null /tmp/emptyfile && tail -F /tmp/emptyfile | sed
's/foo/quux/'
^Z
zsh: suspended tail -F /tmp/emptyfile | sed 's/foo/quux/'
stretch% bg
[1] - continued tail -F /tmp/emptyfile | sed 's/foo/quux/'
stretch% jobs -l
[1] + 1583 running tail -F /tmp/emptyfile |
1584 unknown signal (core dumped) sed
's/foo/quux/'
stretch% echo foobar > /tmp/emptyfile
stretch% quuxbar
After the job completes, the status is correctly displayed as 'done':
stretch% kill 1583
stretch%
[1] + terminated tail -F /tmp/emptyfile |
done sed 's/foo/quux/'
While sending SIGCONT to the processes directly usually has the same
effect, by sending the signals individually in a certain order it's
actually possible to coax the correct behavior out:
stretch% sleep 120 | cat | cat
^Z
zsh: suspended sleep 120 | cat | cat
stretch% jobs -l
[1] + 1613 suspended sleep 120 |
1614 suspended cat |
1615 suspended cat
stretch% kill -CONT 1615 ; jobs -l
[1] + 1613 suspended sleep 120 |
1614 suspended cat |
1615 running cat
stretch% kill -CONT 1614 ; jobs -l
[1] + 1613 suspended sleep 120 |
1614 running cat |
1615 running cat
stretch% kill -CONT 1613 ; jobs -l
[1] + 1613 running sleep 120 |
1614 running cat |
1615 running cat
stretch%
Trying a different order seems to suggest that it happens to the
reader of a pipe if it wakes up (receives SIGCONT) after the writer,
but not if the writer is still suspended:
stretch% jobs -l
[1] + 1653 suspended sleep 120 |
1654 suspended cat |
1655 suspended cat
stretch% kill -CONT 1654; jobs -l
[1] + 1653 suspended sleep 120 |
1654 running cat |
1655 suspended cat
stretch% kill -CONT 1655; jobs -l
[1] + 1653 suspended sleep 120 |
1654 running cat |
1655 unknown signal (core dumped) cat
-- Package-specific info:
Packages which provide code meant to be sourced in .zshrc:
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===============-============-============-====================================
un grml-debootstra <none> <none> (no description available)
Packages which provide vendor completions:
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===============-============-============-====================================
ii pulseaudio 10.0-1 amd64 PulseAudio sound server
ii systemd 232-20~test0 amd64 system and service manager
ii udev 232-20~test0 amd64 /dev/ and hotplug management
daemon
ii vlc-bin 2.2.4-14 amd64 binaries from VLC
dpkg-query: no path found matching pattern /usr/share/zsh/vendor-functions/
-- System Information:
Debian Release: 9.0
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 4.9.0-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages zsh depends on:
ii dpkg 1.18.23
ii libc6 2.24-9
ii libcap2 1:2.25-1
ii libtinfo5 6.0+20161126-1
ii zsh-common 5.3.1-3
Versions of packages zsh recommends:
ii libc6 2.24-9
ii libncursesw5 6.0+20161126-1
ii libpcre3 2:8.39-2.1
Versions of packages zsh suggests:
pn zsh-doc <none>
-- no debconf information
