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Revise markup.
This commit is contained in:
Ruslan Ermilov
parent
4fa0290fbf
commit
092cc6b2ab
1 changed files with 34 additions and 28 deletions
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@ -176,21 +176,21 @@ one is not set in the other.
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.Pp
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The
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.Fn SIGSETOR
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macro ors the signals set in
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macro ORs the signals set in
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.Fa set2
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into
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.Fa set1 .
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.Pp
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The
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.Fn SIGSETAND
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macro ands the signals set in
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macro ANDs the signals set in
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.Fa set2
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into
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.Fa set1 .
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.Pp
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The
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.Fn SIGSETNAND
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macro nands the signals set in
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macro NANDs the signals set in
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.Fa set2
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into
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.Fa set1 .
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@ -230,14 +230,14 @@ macro clears the
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signal from
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.Fa set .
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.Fn SIG_CONTSIGMASK
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is call when a process is stopped.
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is called when a process is stopped.
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.Pp
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The
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.Fn SIGPENDING
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macro determines if the given process has any pending signals that are
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not masked.
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If the process has a pending signal and the process is currently being
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traced
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traced,
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.Fn SIGPENDING
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will return true even if the signal is masked.
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.Pp
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@ -245,13 +245,13 @@ The
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.Fn CURSIG
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function returns the signal number that should be delivered to
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.Fa p .
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If there are no signals pending zero is returned.
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If there are no signals pending, zero is returned.
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.Pp
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The
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.Fn execsigs
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function resets the signal set and signal stack of a process in preparation
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for an
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.Fn exec 2 .
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.Xr execve 2 .
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The lock for
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.Fa p
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must be held before
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@ -274,26 +274,31 @@ is always stopped.
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Stop signals are handled and cleared right away by
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.Fn issignal ,
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unless the process is a member of an orphaned process group and the stop
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signal originated from a tty.
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.Fa sched_lock
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may be acquired and released and if
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.Fa Giant
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is held it may be released and reacquired.
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signal originated from a TTY.
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The
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.Va sched_lock
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lock
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may be acquired and released, and if
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.Va Giant
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is held, it may be released and reacquired.
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.Fa p
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must be locked before
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.Fn issignal
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is called and may be released and reacquired during the call; as well,
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.Fa p's
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.Fa p
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parent's lock may be acquired and released.
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Default signal actions are not taken for system processes and init.
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.Pp
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The
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.Fn killproc
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function delivers
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.Dv SIGKILL to
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.Dv SIGKILL
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to
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.Fa p .
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.Fa why
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is logged as the reason "why" the process was killed.
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is logged as the reason
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.Em why
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the process was killed.
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.Pp
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The
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.Fn pgsigio
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@ -303,17 +308,17 @@ to the process or process group
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.Fa sigiop->sio_pgid .
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If
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.Fa checkctty
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is non-zero the signal is only delivered to processes in the process group
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is non-zero, the signal is only delivered to processes in the process group
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that have a controlling terminal.
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If
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.Va sigiop->sio_pgid
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.Fa sigiop->sio_pgid
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is for a process (> 0), the lock for
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.Va sigiop->sio_proc
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.Fa sigiop->sio_proc
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is acquired and released.
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If
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.Va sigiop->sio_pgid
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.Fa sigiop->sio_pgid
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is for a process group (< 0), the process group lock for
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.Va sigiop->sio_pgrp
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.Fa sigiop->sio_pgrp
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is acquired and released.
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.Fa sigio_lock
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is acquired and released.
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@ -342,14 +347,14 @@ The
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function causes the process that owns
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.Fa td
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to exit with a return value of signal number
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.Fa sig.
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.Fa sig .
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If required, the process will dump core.
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The lock for the process that owns
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.Fa td
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must be held before
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.Fn sigexit
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is called, and
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.Fa Giant
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.Va Giant
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will be acquired if it is not already held.
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.Pp
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The
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@ -369,7 +374,7 @@ The only process that
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.Fn siginit
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is ever called for
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is
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.Va proc0.
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.Va proc0 .
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.Pp
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The
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.Fn signotify
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@ -377,11 +382,11 @@ function flags that there are unmasked signals pending that
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.Fn ast
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should handle.
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The lock for
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.Pa p
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.Fa p
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must be held before
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.Fn signotify
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is called, and
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.Fa sched_lock
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.Va sched_lock
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is acquired and released.
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.Pp
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The
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@ -389,14 +394,15 @@ The
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function sends a signal that is the result of a trap to
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.Fa p .
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If the process is not being traced and the signal can be delivered
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immediately
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immediately,
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.Fn trapsignal
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will deliver it directly; otherwise,
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.Fn trapsignal
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will call
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.Xr psignal 9
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to cause the signal to be delivered.
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Giant is acquired and released, as is the lock for
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.Va Giant
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is acquired and released, as is the lock for
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.Fa p .
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.Sh RETURN VALUES
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The
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@ -407,7 +413,7 @@ The
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.Fn SIGSETNEQ ,
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and
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.Fn SIGPENDING
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macros all return non\-zero (true) if the condition they are checking
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macros all return non-zero (true) if the condition they are checking
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is found to be true; otherwise, zero (false) is returned.
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.Pp
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.Fn CURSIG
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