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/* Signal number constants. Generic template. Copyright (C) 1991-2021 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 <https://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 SIGPIPE 13 /* Broken pipe. */ #define SIGALRM 14 /* Alarm clock. */ /* 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. */ /* Include system specific bits. */ #include <bits/signum-arch.h> /* Biggest signal number + 1 (including real-time signals). */ #define _NSIG (__SIGRTMAX + 1) #endif /* bits/signum-generic.h. */