From 8082d91e1c449e0cb137468b731004a5e605c8c6 Mon Sep 17 00:00:00 2001 From: Zack Weinberg Date: Sat, 3 Jun 2017 16:22:24 -0400 Subject: Factor out shared definitions from bits/signum.h. Many of the things defined by bits/signum.h are invariant across all supported operating systems. This patch factors out all of them to a new header bits/signum-generic.h, which each bits/signum.h will include and then override whichever things need adjustment. Normally that will mean, at most, adding or changing a few signal numbers. A user-visible side effect is that the obsolete signal constant SIGUNUSED (which is an alias for SIGSYS on all platforms that define it) is no longer exposed by any version of bits/signum.h. A side effect only relevant to glibc hackers is that _NSIG is now defined in terms of __SIGRTMAX, instead of the other way around. This is because __SIGRTMAX varies from platform to platform, but _NSIG==__SIGRTMAX+1 is true universally. If your platform doesn't support realtime signals, leave __SIGRTMAX equal to __SIGRTMIN. I also added a Linux-specific test to make sure that our signal constants match the ones in , since we can't use that header (it's not even vaguely namespace-clean). * bits/signum-generic.h: Renamed from bits/signum.h. Add proper multiple include guard and misuse check. Define __SIGRTMIN = __SIGRTMAX = 32, and define _NSIG = __SIGRTMAX+1. Move definition of SIGIO to "archaic names for compatibility" section. * bits/signum.h: New file which just includes bits/signum-generic.h. * sysdeps/unix/bsd/bits/signum.h * sysdeps/unix/sysv/linux/bits/signum.h * sysdeps/unix/sysv/linux/alpha/bits/signum.h * sysdeps/unix/sysv/linux/hppa/bits/signum.h * sysdeps/unix/sysv/linux/mips/bits/signum.h * sysdeps/unix/sysv/linux/sparc/bits/signum.h Just include and then add or adjust signal constants. Do not define SIGUNUSED, SIGRTMIN, or SIGRTMAX. * signal/Makefile: Install bits/signum-generic.h. * signal/signal.h: Define SIGRTMIN and SIGRTMAX here. * sysdeps/generic/siglist.h: SIGSYS and SIGWINCH are universal. Prefer SIGPOLL to SIGIO. Simplify #ifdeffage. * sysdeps/unix/sysv/linux/tst-signal-numbers.sh: New test. * sysdeps/unix/sysv/linux/Makefile: Run it. --- sysdeps/unix/bsd/bits/signum.h | 58 ++++++++---------------------------------- 1 file changed, 10 insertions(+), 48 deletions(-) (limited to 'sysdeps/unix/bsd/bits') diff --git a/sysdeps/unix/bsd/bits/signum.h b/sysdeps/unix/bsd/bits/signum.h index 268c24a702..f55edc93a3 100644 --- a/sysdeps/unix/bsd/bits/signum.h +++ b/sysdeps/unix/bsd/bits/signum.h @@ -16,58 +16,20 @@ License along with the GNU C Library; if not, see . */ -#ifdef _SIGNAL_H +#ifndef _BITS_SIGNUM_H +#define _BITS_SIGNUM_H 1 -/* This file defines the fake signal functions and signal - number constants for 4.2 or 4.3 BSD-derived Unix system. */ - -/* 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. */ +#ifndef _SIGNAL_H +#error "Never include directly; use instead." #endif +#include -/* Signals. */ -#define SIGHUP 1 /* Hangup (POSIX). */ -#define SIGINT 2 /* Interrupt (ANSI). */ -#define SIGQUIT 3 /* Quit (POSIX). */ -#define SIGILL 4 /* Illegal instruction (ANSI). */ -#define SIGABRT SIGIOT /* Abort (ANSI). */ -#define SIGTRAP 5 /* Trace trap (POSIX). */ -#define SIGIOT 6 /* IOT trap (4.2 BSD). */ -#define SIGEMT 7 /* EMT trap (4.2 BSD). */ -#define SIGFPE 8 /* Floating-point exception (ANSI). */ -#define SIGKILL 9 /* Kill, unblockable (POSIX). */ -#define SIGBUS 10 /* Bus error (4.2 BSD). */ -#define SIGSEGV 11 /* Segmentation violation (ANSI). */ -#define SIGSYS 12 /* Bad argument to system call (4.2 BSD). */ -#define SIGPIPE 13 /* Broken pipe (POSIX). */ -#define SIGALRM 14 /* Alarm clock (POSIX). */ -#define SIGTERM 15 /* Termination (ANSI). */ -#define SIGURG 16 /* Urgent condition on socket (4.2 BSD). */ -#define SIGSTOP 17 /* Stop, unblockable (POSIX). */ -#define SIGTSTP 18 /* Keyboard stop (POSIX). */ -#define SIGCONT 19 /* Continue (POSIX). */ -#define SIGCHLD 20 /* Child status has changed (POSIX). */ -#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */ -#define SIGTTIN 21 /* Background read from tty (POSIX). */ -#define SIGTTOU 22 /* Background write to tty (POSIX). */ -#define SIGIO 23 /* I/O now possible (4.2 BSD). */ -#define SIGPOLL SIGIO /* Same as SIGIO? (SVID). */ -#define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */ -#define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */ -#define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */ -#define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */ -#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */ +/* Adjustments and additions to the signal number constants for + 4.2 or 4.3 BSD-derived Unix systems. */ + +#define SIGEMT 7 /* Emulator trap (4.2 BSD). */ #define SIGINFO 29 /* Information request (4.4 BSD). */ -#define SIGUSR1 30 /* User-defined signal 1 (POSIX). */ -#define SIGUSR2 31 /* User-defined signal 2 (POSIX). */ #define SIGLOST 32 /* Resource lost (Sun); server died (GNU). */ -#endif /* included. */ - -#define _NSIG 33 /* Biggest signal number + 1. */ +#endif /* bits/signum.h. */ -- cgit 1.4.1