[Asterisk-code-review] app.c: make sure that no non-async-signal-safe syscalls are used afte... (asterisk[16])

[nappsoft]

Hello Joshua Colp, Kevin Harwell, Friendly Automation, Richard Mudgett, 

I'd like you to reexamine a change. Please visit

    https://gerrit.asterisk.org/c/asterisk/+/14209

to look at the new patch set (#5).

Change subject: app.c: make sure that no non-async-signal-safe syscalls are used after fork before exec
......................................................................

app.c: make sure that no non-async-signal-safe syscalls are used after
fork before exec

Posix does only allow async-signal-safe syscalls after fork before exec.
As asterisk ignores this, functions like TrySystem or System sometimes
end up in a deadlocked child process. The patch prevents the use of
non-async-signal-safe syscalls.

ASTERISK-28776

Change-Id: Idc76365c0592ee3f3b3bd72a4f48f7a098978e8e
---
M main/app.c
M main/asterisk.c
M main/strcompat.c
3 files changed, 75 insertions(+), 58 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/09/14209/5
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Gerrit-Project: asterisk
Gerrit-Branch: 16
Gerrit-Change-Id: Idc76365c0592ee3f3b3bd72a4f48f7a098978e8e
Gerrit-Change-Number: 14209
Gerrit-PatchSet: 5
Gerrit-Owner: nappsoft <infos at nappsoft.ch>
Gerrit-Reviewer: Friendly Automation
Gerrit-Reviewer: Joshua Colp <jcolp at sangoma.com>
Gerrit-Reviewer: Kevin Harwell <kharwell at digium.com>
Gerrit-Reviewer: Richard Mudgett <rmudgett at digium.com>
Gerrit-CC: Sean Bright <sean.bright at gmail.com>
Gerrit-MessageType: newpatchset
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