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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:24 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:24 +0000 |
commit | 100d1b33f088fd38f69129afff7f9c2a1e084a57 (patch) | |
tree | 5bf6b0bb14f22ecf0a5e9439fdd4c4758402400c /man/man3/gsignal.3 | |
parent | Releasing progress-linux version 6.7-2~progress7.99u1. (diff) | |
download | manpages-100d1b33f088fd38f69129afff7f9c2a1e084a57.tar.xz manpages-100d1b33f088fd38f69129afff7f9c2a1e084a57.zip |
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man/man3/gsignal.3')
-rw-r--r-- | man/man3/gsignal.3 | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/man/man3/gsignal.3 b/man/man3/gsignal.3 new file mode 100644 index 0000000..748d320 --- /dev/null +++ b/man/man3/gsignal.3 @@ -0,0 +1,118 @@ +'\" t +.\" Copyright (C) 2002 Andries Brouwer <aeb@cwi.nl> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" This replaces an earlier man page written by Walter Harms +.\" <walter.harms@informatik.uni-oldenburg.de>. +.TH gsignal 3 2024-05-02 "Linux man-pages (unreleased)" +.SH NAME +gsignal, ssignal \- software signal facility +.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]] int gsignal(int " signum ); +.P +.BI "[[deprecated]] sighandler_t ssignal(int " signum ", sighandler_t " action ); +.fi +.P +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.P +.BR gsignal (), +.BR ssignal (): +.nf + Since glibc 2.19: + _DEFAULT_SOURCE + glibc 2.19 and earlier: + _SVID_SOURCE +.fi +.SH DESCRIPTION +Don't use these functions under Linux. +Due to a historical mistake, under Linux these functions are +aliases for +.BR raise (3) +and +.BR signal (2), +respectively. +.P +Elsewhere, on System V-like systems, these functions implement +software signaling, entirely independent of the classical +.BR signal (2) +and +.BR kill (2) +functions. +The function +.BR ssignal () +defines the action to take when the software signal with +number +.I signum +is raised using the function +.BR gsignal (), +and returns the previous such action or +.BR SIG_DFL . +The function +.BR gsignal () +does the following: if no action (or the action +.BR SIG_DFL ) +was +specified for +.IR signum , +then it does nothing and returns 0. +If the action +.B SIG_IGN +was specified for +.IR signum , +then it does nothing and returns 1. +Otherwise, it resets the action to +.B SIG_DFL +and calls +the action function with argument +.IR signum , +and returns the value returned by that function. +The range of possible values +.I signum +varies (often 1\[en]15 or 1\[en]17). +.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 gsignal () +T} Thread safety MT-Safe +T{ +.na +.nh +.BR ssignal () +T} Thread safety MT-Safe sigintr +.TE +.SH STANDARDS +None. +.SH HISTORY +AIX, DG/UX, HP-UX, SCO, Solaris, Tru64. +They are called obsolete under most of these systems, and are +broken under +.\" Linux libc and +glibc. +Some systems also have +.BR gsignal_r () +and +.BR ssignal_r (). +.SH SEE ALSO +.BR kill (2), +.BR signal (2), +.BR raise (3) |