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8082d91e1c
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 <asm/signal.h>, 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 <bits/signum-generic.h> 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.
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* Signal number definitions. Linux/HPPA version.
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Copyright (C) 1995-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _BITS_SIGNUM_H
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#define _BITS_SIGNUM_H 1
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#ifndef _SIGNAL_H
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#error "Never include <bits/signum.h> directly; use <signal.h> instead."
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#endif
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#include <bits/signum-generic.h>
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/* Adjustments and additions to the signal number constants for
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Linux/HPPA. These values were originally chosen for HP/UX
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compatibility, but were renumbered as of kernel 3.17 and glibc 2.21
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to accommodate software (notably systemd) that assumed at least 29
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real-time signal numbers would be available. SIGEMT and SIGLOST
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were removed, and the values of SIGSTKFLT, SIGXCPU, XIGXFSZ, and
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SIGSYS were changed, enabling __SIGRTMIN to be 32. */
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#define SIGSTKFLT 7 /* Stack fault (obsolete). */
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#define SIGPWR 19 /* Power failure imminent. */
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#undef SIGXCPU
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#define SIGXCPU 12
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#undef SIGUSR1
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#define SIGUSR1 16
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#undef SIGUSR2
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#define SIGUSR2 17
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#undef SIGCHLD
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#define SIGCHLD 18
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#undef SIGVTALRM
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#define SIGVTALRM 20
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#undef SIGPROF
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#define SIGPROF 21
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#undef SIGPOLL
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#define SIGPOLL 22
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#undef SIGWINCH
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#define SIGWINCH 23
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#undef SIGSTOP
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#define SIGSTOP 24
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#undef SIGTSTP
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#define SIGTSTP 25
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#undef SIGCONT
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#define SIGCONT 26
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#undef SIGTTIN
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#define SIGTTIN 27
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#undef SIGTTOU
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#define SIGTTOU 28
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#undef SIGURG
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#define SIGURG 29
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#undef SIGXFSZ
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#define SIGXFSZ 30
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#undef SIGSYS
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#define SIGSYS 31
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#undef __SIGRTMAX
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#define __SIGRTMAX 64
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#endif /* <signal.h> included. */
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