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fish-shell/tests/pexpects/tty_ownership.py

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Bravely remove reclaim... param from continue_job, and rework tcsetpgrp calls This changes how fish attempts to protect itself from calling tcsetpgrp() too aggressively. Recall that tcsetpgrp() will "force" itself, if SIGTTOU is ignored (which it is in fish when job control is enabled). Prior to this fix, we avoided SIGTTINs by only transferring the tty ownership if fish was already the owner. This dated from a time before we had really nailed down how pgroups should be assigned. Now we more deliberately assign a job's pgroup so we don't need this conservative check. However we still need logic to avoid transferring the tty if fish is not the owner. The bad case is when job control is enabled while fish is running in the background - here fish would transfer the tty and "steal" from the foreground process. So retain the checks of the current tty owner but migrate them to the point of calling tcsetpgrp() itself.
2020-07-27 08:55:00 +08:00
#!/usr/bin/env python3
from pexpect_helper import SpawnedProc
sp = SpawnedProc()
sendline, expect_prompt = sp.sendline, sp.expect_prompt
expect_prompt()
sendline("status job-control full")
expect_prompt()
Reformat
2020-11-22 21:39:48 +08:00
sendline(
"$fish -c 'status job-control full ; $fish_test_helper report_foreground' &; wait"
)
Bravely remove reclaim... param from continue_job, and rework tcsetpgrp calls This changes how fish attempts to protect itself from calling tcsetpgrp() too aggressively. Recall that tcsetpgrp() will "force" itself, if SIGTTOU is ignored (which it is in fish when job control is enabled). Prior to this fix, we avoided SIGTTINs by only transferring the tty ownership if fish was already the owner. This dated from a time before we had really nailed down how pgroups should be assigned. Now we more deliberately assign a job's pgroup so we don't need this conservative check. However we still need logic to avoid transferring the tty if fish is not the owner. The bad case is when job control is enabled while fish is running in the background - here fish would transfer the tty and "steal" from the foreground process. So retain the checks of the current tty owner but migrate them to the point of calling tcsetpgrp() itself.
2020-07-27 08:55:00 +08:00
expect_prompt()
sendline("echo it worked")
expect_prompt("it worked")
Claim the tty unconditionally in reader_data_t::readline When fish runs with job control enabled, it transfers ownership of the tty to a child process, and then reclaims the tty after the process exits. If job control is disabled then fish does not transfer or reclaim the tty. It may happen that the child process creates a pgroup and then transfers the tty to it. In that case fish will not attempt to reclaim the tty, as fish did not transfer it. Then when fish reads from stdin it will receive SIGTTIN instead of data. Fix this by unconditionally claiming the tty in readline(). Fixes #9181
2022-09-09 07:47:43 +08:00
# Regression test for #9181
sendline("status job-control interactive")
expect_prompt()
sendline("$fish_test_helper abandon_tty")
expect_prompt()
sendline("echo cool")
expect_prompt("cool")
sendline("true ($fish_test_helper abandon_tty)")
expect_prompt()
sendline("echo even cooler")
expect_prompt("even cooler")
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