Merging upstream version 6.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 265 deletions

diff --git a/man3/sigset.3 b/man3/sigset.3
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-'\" t
-.\" Copyright (c) 2005 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH sigset 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-sigset, sighold, sigrelse, sigignore \- System V signal API
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <signal.h>
-.P
-.B typedef void (*sighandler_t)(int);
-.P
-.BI "[[deprecated]] sighandler_t sigset(int " sig ", sighandler_t " disp );
-.P
-.BI "[[deprecated]] int sighold(int " sig );
-.BI "[[deprecated]] int sigrelse(int " sig );
-.BI "[[deprecated]] int sigignore(int " sig );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR sigset (),
-.BR sighold (),
-.BR sigrelse (),
-.BR sigignore ():
-.nf
-    _XOPEN_SOURCE >= 500
-.\"    || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
-.fi
-.SH DESCRIPTION
-These functions are provided in glibc as a compatibility interface
-for programs that make use of the historical System V signal API.
-This API is obsolete: new applications should use the POSIX signal API
-.RB ( sigaction (2),
-.BR sigprocmask (2),
-etc.)
-.P
-The
-.BR sigset ()
-function modifies the disposition of the signal
-.IR sig .
-The
-.I disp
-argument can be the address of a signal handler function,
-or one of the following constants:
-.TP
-.B SIG_DFL
-Reset the disposition of
-.I sig
-to the default.
-.TP
-.B SIG_IGN
-Ignore
-.IR sig .
-.TP
-.B SIG_HOLD
-Add
-.I sig
-to the process's signal mask, but leave the disposition of
-.I sig
-unchanged.
-.P
-If
-.I disp
-specifies the address of a signal handler, then
-.I sig
-is added to the process's signal mask during execution of the handler.
-.P
-If
-.I disp
-was specified as a value other than
-.BR SIG_HOLD ,
-then
-.I sig
-is removed from the process's signal mask.
-.P
-The dispositions for
-.B SIGKILL
-and
-.B SIGSTOP
-cannot be changed.
-.P
-The
-.BR sighold ()
-function adds
-.I sig
-to the calling process's signal mask.
-.P
-The
-.BR sigrelse ()
-function removes
-.I sig
-from the calling process's signal mask.
-.P
-The
-.BR sigignore ()
-function sets the disposition of
-.I sig
-to
-.BR SIG_IGN .
-.SH RETURN VALUE
-On success,
-.BR sigset ()
-returns
-.B SIG_HOLD
-if
-.I sig
-was blocked before the call,
-or the signal's previous disposition
-if it was not blocked before the call.
-On error,
-.BR sigset ()
-returns \-1, with
-.I errno
-set to indicate the error.
-(But see BUGS below.)
-.P
-The
-.BR sighold (),
-.BR sigrelse (),
-and
-.BR sigignore ()
-functions return 0 on success; on error, these functions return \-1 and set
-.I errno
-to indicate the error.
-.SH ERRORS
-For
-.BR sigset ()
-see the ERRORS under
-.BR sigaction (2)
-and
-.BR sigprocmask (2).
-.P
-For
-.BR sighold ()
-and
-.BR sigrelse ()
-see the ERRORS under
-.BR sigprocmask (2).
-.P
-For
-.BR sigignore (),
-see the errors under
-.BR sigaction (2).
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.na
-.nh
-.BR sigset (),
-.BR sighold (),
-.BR sigrelse (),
-.BR sigignore ()
-T}	Thread safety	MT-Safe
-.TE
-.SH STANDARDS
-POSIX.1-2008.
-.TP
-.I sighandler_t
-GNU.
-POSIX.1 uses the same type but without a
-.IR typedef .
-.SH HISTORY
-glibc 2.1.
-SVr4, POSIX.1-2001.
-POSIX.1-2008 marks these functions
-as obsolete, recommending the use of
-.BR sigaction (2),
-.BR sigprocmask (2),
-.BR pthread_sigmask (3),
-and
-.BR sigsuspend (2)
-instead.
-.SH NOTES
-The
-.BR sigset ()
-function provides reliable signal handling semantics (as when calling
-.BR sigaction (2)
-with
-.I sa_mask
-equal to 0).
-.P
-On System V, the
-.BR signal ()
-function provides unreliable semantics (as when calling
-.BR sigaction (2)
-with
-.I sa_mask
-equal to
-.IR "SA_RESETHAND | SA_NODEFER" ).
-On BSD,
-.BR signal ()
-provides reliable semantics.
-POSIX.1-2001 leaves these aspects of
-.BR signal ()
-unspecified.
-See
-.BR signal (2)
-for further details.
-.P
-In order to wait for a signal,
-BSD and System V both provided a function named
-.BR sigpause (3),
-but this function has a different argument on the two systems.
-See
-.BR sigpause (3)
-for details.
-.SH BUGS
-Before glibc 2.2,
-.BR sigset ()
-did not unblock
-.I sig
-if
-.I disp
-was specified as a value other than
-.BR SIG_HOLD .
-.P
-Before glibc 2.5,
-.BR sigset ()
-does not correctly return the previous disposition of the signal
-in two cases.
-First, if
-.I disp
-is specified as
-.BR SIG_HOLD ,
-then a successful
-.BR sigset ()
-always returns
-.BR SIG_HOLD .
-Instead, it should return the previous disposition of the signal
-(unless the signal was blocked, in which case
-.B SIG_HOLD
-should be returned).
-Second, if the signal is currently blocked, then
-the return value of a successful
-.BR sigset ()
-should be
-.BR SIG_HOLD .
-Instead, the previous disposition of the signal is returned.
-These problems have been fixed since glibc 2.5.
-.\" See http://sourceware.org/bugzilla/show_bug.cgi?id=1951
-.SH SEE ALSO
-.BR kill (2),
-.BR pause (2),
-.BR sigaction (2),
-.BR signal (2),
-.BR sigprocmask (2),
-.BR raise (3),
-.BR sigpause (3),
-.BR sigvec (3),
-.BR signal (7)