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Kernel: Distinguish between new and old process groups with equal pgids

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This does not add any behaviour change to the processes, but it ties a
TTY to an active process group via TIOCSPGRP, and returns the TTY to the
kernel when all processes in the process group die.
Also makes the TTY keep a link to the original controlling process' parent (for
SIGCHLD) instead of the process itself.
This commit is contained in:
AnotherTest 2020-08-15 23:43:19 +04:30 • committed by Andreas Kling
parent cf18bff72a
commit 688e54eac7
9 changed files with 176 additions and 23 deletions
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2
Kernel/Syscalls/fork.cpp
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@ -46,7 +46,7 @@ pid_t Process::sys$fork(RegisterState& regs)
child->m_unveiled_paths = m_unveiled_paths;
child->m_fds = m_fds;
child->m_sid = m_sid;
child->m_pgid = m_pgid;
child->m_pg = m_pg;
child->m_umask = m_umask;
#ifdef FORK_DEBUG