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signum-generic.h
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/* Signal number constants. Generic template.
Copyright (C) 1991-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _BITS_SIGNUM_GENERIC_H
#define _BITS_SIGNUM_GENERIC_H 1
#ifndef _SIGNAL_H
#error "Never include <bits/signum-generic.h> directly; use <signal.h> instead."
#endif
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#endif
/* We define here all the signal names listed in POSIX (1003.1-2008);
as of 1003.1-2013, no additional signals have been added by POSIX.
We also define here signal names that historically exist in every
real-world POSIX variant (e.g. SIGWINCH).
Signals in the 1-15 range are defined with their historical numbers.
For other signals, we use the BSD numbers.
There are two unallocated signal numbers in the 1-31 range: 7 and 29.
Signal number 0 is reserved for use as kill(pid, 0), to test whether
a process exists without sending it a signal. */
/* ISO C99 signals. */
#define SIGINT 2 /* Interactive attention signal. */
#define SIGILL 4 /* Illegal instruction. */
#define SIGABRT 6 /* Abnormal termination. */
#define SIGFPE 8 /* Erroneous arithmetic operation. */
#define SIGSEGV 11 /* Invalid access to storage. */
#define SIGTERM 15 /* Termination request. */
/* Historical signals specified by POSIX. */
#define SIGHUP 1 /* Hangup. */
#define SIGQUIT 3 /* Quit. */
#define SIGTRAP 5 /* Trace/breakpoint trap. */
#define SIGKILL 9 /* Killed. */
#define SIGBUS 10 /* Bus error. */
#define SIGSYS 12 /* Bad system call. */
#define SIGPIPE 13 /* Broken pipe. */
#define SIGALRM 14 /* Alarm clock. */
/* New(er) POSIX signals (1003.1-2008, 1003.1-2013). */
#define SIGURG 16 /* Urgent data is available at a socket. */
#define SIGSTOP 17 /* Stop, unblockable. */
#define SIGTSTP 18 /* Keyboard stop. */
#define SIGCONT 19 /* Continue. */
#define SIGCHLD 20 /* Child terminated or stopped. */
#define SIGTTIN 21 /* Background read from control terminal. */
#define SIGTTOU 22 /* Background write to control terminal. */
#define SIGPOLL 23 /* Pollable event occurred (System V). */
#define SIGXCPU 24 /* CPU time limit exceeded. */
#define SIGXFSZ 25 /* File size limit exceeded. */
#define SIGVTALRM 26 /* Virtual timer expired. */
#define SIGPROF 27 /* Profiling timer expired. */
#define SIGUSR1 30 /* User-defined signal 1. */
#define SIGUSR2 31 /* User-defined signal 2. */
/* Nonstandard signals found in all modern POSIX systems
(including both BSD and Linux). */
#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
/* Archaic names for compatibility. */
#define SIGIO SIGPOLL /* I/O now possible (4.2 BSD). */
#define SIGIOT SIGABRT /* IOT instruction, abort() on a PDP-11. */
#define SIGCLD SIGCHLD /* Old System V name */
/* Not all systems support real-time signals. bits/signum.h indicates
that they are supported by overriding __SIGRTMAX to a value greater
than __SIGRTMIN. These constants give the kernel-level hard limits,
but some real-time signals may be used internally by glibc. Do not
use these constants in application code; use SIGRTMIN and SIGRTMAX
(defined in signal.h) instead. */
#define __SIGRTMIN 32
#define __SIGRTMAX __SIGRTMIN
/* Biggest signal number + 1 (including real-time signals). */
#define _NSIG (__SIGRTMAX + 1)
#endif /* bits/signum-generic.h. */