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stringlengths 0
234
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calls a function that is not async-signal-safe, the behavior is undefined.
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a future revision of the standard
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.\" http://www.opengroup.org/austin/aardvark/latest/xshbug3.txt
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is likely to remove
|
.br fork (2)
|
from the list of async-signal-safe functions.
|
.\"
|
.ip * 3
|
asynchronous signal handlers that call functions which are cancellation
|
points and nest over regions of deferred cancellation may trigger
|
cancellation whose behavior is as if asynchronous cancellation had
|
occurred and may cause application state to become inconsistent.
|
.\"
|
.ss errno
|
fetching and setting the value of
|
.i errno
|
is async-signal-safe provided that the signal handler saves
|
.i errno
|
on entry and restores its value before returning.
|
.\"
|
.ss deviations in the gnu c library
|
the following known deviations from the standard occur in
|
the gnu c library:
|
.ip * 3
|
before glibc 2.24,
|
.br execl (3)
|
and
|
.br execle (3)
|
employed
|
.br realloc (3)
|
internally and were consequently not async-signal-safe.
|
.\" https://sourceware.org/bugzilla/show_bug.cgi?id=19534
|
this was fixed in glibc 2.24.
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.ip *
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.\" fixme . https://sourceware.org/bugzilla/show_bug.cgi?id=13172
|
the glibc implementation of
|
.br aio_suspend (3)
|
is not async-signal-safe because it uses
|
.br pthread_mutex_lock (3)
|
internally.
|
.sh see also
|
.br sigaction (2),
|
.br signal (7),
|
.br standards (7)
|
.sh colophon
|
this page is part of release 5.13 of the linux
|
.i man-pages
|
project.
|
a description of the project,
|
information about reporting bugs,
|
and the latest version of this page,
|
can be found at
|
\%https://www.kernel.org/doc/man\-pages/.
|
.so man3/circleq.3
|
.\" copyright (c) 1995 martin schulze <joey@infodrom.north.de>
|
.\"
|
.\" %%%license_start(gplv2+_doc_full)
|
.\" this is free documentation; you can redistribute it and/or
|
.\" modify it under the terms of the gnu general public license as
|
.\" published by the free software foundation; either version 2 of
|
.\" the license, or (at your option) any later version.
|
.\"
|
.\" the gnu general public license's references to "object code"
|
.\" and "executables" are to be interpreted as the output of any
|
.\" document formatting or typesetting system, including
|
.\" intermediate and printed output.
|
.\"
|
.\" this manual is distributed in the hope that it will be useful,
|
.\" but without any warranty; without even the implied warranty of
|
.\" merchantability or fitness for a particular purpose. see the
|
.\" gnu general public license for more details.
|
.\"
|
.\" you should have received a copy of the gnu general public
|
.\" license along with this manual; if not, see
|
.\" <http://www.gnu.org/licenses/>.
|
.\" %%%license_end
|
.\"
|
.\" 1995-10-18 martin schulze <joey@infodrom.north.de>
|
.\" * first released
|
.\" 2002-09-22 seth w. klein <sk@sethwklein.net>
|
.\" * protocol numbers are now assigned by the iana
|
.\"
|
.th protocols 5 2012-08-05 "linux" "linux programmer's manual"
|
.sh name
|
protocols \- protocols definition file
|
.sh description
|
this file is a plain ascii file, describing the various darpa internet
|
protocols that are available from the tcp/ip subsystem.
|
it should be
|
consulted instead of using the numbers in the arpa include files, or,
|
even worse, just guessing them.
|
these numbers will occur in the
|
protocol field of any ip header.
|
.pp
|
keep this file untouched since changes would result in incorrect ip
|
packages.
|
protocol numbers and names are specified by the iana
|
(internet assigned numbers authority).
|
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