350 lines
7.0 KiB
C
350 lines
7.0 KiB
C
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/* sig2str.c -- convert between signal names and numbers
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Copyright (C) 2002, 2004, 2006, 2009-2020 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert. */
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#include <config.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "sig2str.h"
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#ifndef SIGRTMIN
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# define SIGRTMIN 0
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# undef SIGRTMAX
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#endif
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#ifndef SIGRTMAX
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# define SIGRTMAX (SIGRTMIN - 1)
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#endif
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#define NUMNAME(name) { SIG##name, #name }
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/* Signal names and numbers. Put the preferred name first. */
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static struct numname { int num; char const name[8]; } numname_table[] =
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{
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/* Signals required by POSIX 1003.1-2001 base, listed in
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traditional numeric order where possible. */
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#ifdef SIGHUP
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NUMNAME (HUP),
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#endif
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#ifdef SIGINT
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NUMNAME (INT),
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#endif
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#ifdef SIGQUIT
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NUMNAME (QUIT),
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#endif
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#ifdef SIGILL
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NUMNAME (ILL),
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#endif
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#ifdef SIGTRAP
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NUMNAME (TRAP),
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#endif
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#ifdef SIGABRT
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NUMNAME (ABRT),
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#endif
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#ifdef SIGFPE
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NUMNAME (FPE),
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#endif
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#ifdef SIGKILL
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NUMNAME (KILL),
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#endif
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#ifdef SIGSEGV
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NUMNAME (SEGV),
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#endif
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/* On Haiku, SIGSEGV == SIGBUS, but we prefer SIGSEGV to match
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strsignal.c output, so SIGBUS must be listed second. */
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#ifdef SIGBUS
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NUMNAME (BUS),
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#endif
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#ifdef SIGPIPE
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NUMNAME (PIPE),
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#endif
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#ifdef SIGALRM
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NUMNAME (ALRM),
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#endif
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#ifdef SIGTERM
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NUMNAME (TERM),
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#endif
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#ifdef SIGUSR1
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NUMNAME (USR1),
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#endif
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#ifdef SIGUSR2
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NUMNAME (USR2),
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#endif
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#ifdef SIGCHLD
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NUMNAME (CHLD),
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#endif
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#ifdef SIGURG
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NUMNAME (URG),
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#endif
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#ifdef SIGSTOP
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NUMNAME (STOP),
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#endif
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#ifdef SIGTSTP
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NUMNAME (TSTP),
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#endif
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#ifdef SIGCONT
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NUMNAME (CONT),
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#endif
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#ifdef SIGTTIN
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NUMNAME (TTIN),
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#endif
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#ifdef SIGTTOU
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NUMNAME (TTOU),
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#endif
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/* Signals required by POSIX 1003.1-2001 with the XSI extension. */
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#ifdef SIGSYS
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NUMNAME (SYS),
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#endif
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#ifdef SIGPOLL
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NUMNAME (POLL),
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#endif
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#ifdef SIGVTALRM
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NUMNAME (VTALRM),
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#endif
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#ifdef SIGPROF
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NUMNAME (PROF),
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#endif
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#ifdef SIGXCPU
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NUMNAME (XCPU),
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#endif
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#ifdef SIGXFSZ
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NUMNAME (XFSZ),
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#endif
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/* Unix Version 7. */
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#ifdef SIGIOT
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NUMNAME (IOT), /* Older name for ABRT. */
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#endif
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#ifdef SIGEMT
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NUMNAME (EMT),
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#endif
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/* USG Unix. */
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#ifdef SIGPHONE
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NUMNAME (PHONE),
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#endif
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#ifdef SIGWIND
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NUMNAME (WIND),
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#endif
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/* Unix System V. */
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#ifdef SIGCLD
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NUMNAME (CLD),
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#endif
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#ifdef SIGPWR
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NUMNAME (PWR),
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#endif
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/* GNU/Linux 2.2 and Solaris 8. */
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#ifdef SIGCANCEL
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NUMNAME (CANCEL),
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#endif
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#ifdef SIGLWP
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NUMNAME (LWP),
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#endif
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#ifdef SIGWAITING
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NUMNAME (WAITING),
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#endif
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#ifdef SIGFREEZE
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NUMNAME (FREEZE),
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#endif
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#ifdef SIGTHAW
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NUMNAME (THAW),
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#endif
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#ifdef SIGLOST
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NUMNAME (LOST),
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#endif
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#ifdef SIGWINCH
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NUMNAME (WINCH),
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#endif
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/* GNU/Linux 2.2. */
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#ifdef SIGINFO
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NUMNAME (INFO),
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#endif
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#ifdef SIGIO
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NUMNAME (IO),
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#endif
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#ifdef SIGSTKFLT
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NUMNAME (STKFLT),
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#endif
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/* AIX 5L. */
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#ifdef SIGDANGER
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NUMNAME (DANGER),
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#endif
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#ifdef SIGGRANT
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NUMNAME (GRANT),
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#endif
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#ifdef SIGMIGRATE
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NUMNAME (MIGRATE),
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#endif
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#ifdef SIGMSG
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NUMNAME (MSG),
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#endif
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#ifdef SIGPRE
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NUMNAME (PRE),
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#endif
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#ifdef SIGRETRACT
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NUMNAME (RETRACT),
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#endif
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#ifdef SIGSAK
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NUMNAME (SAK),
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#endif
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#ifdef SIGSOUND
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NUMNAME (SOUND),
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#endif
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/* Older AIX versions. */
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#ifdef SIGALRM1
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NUMNAME (ALRM1), /* unknown; taken from Bash 2.05 */
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#endif
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#ifdef SIGKAP
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NUMNAME (KAP), /* Older name for SIGGRANT. */
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#endif
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#ifdef SIGVIRT
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NUMNAME (VIRT), /* unknown; taken from Bash 2.05 */
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#endif
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#ifdef SIGWINDOW
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NUMNAME (WINDOW), /* Older name for SIGWINCH. */
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#endif
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/* BeOS */
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#ifdef SIGKILLTHR
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NUMNAME (KILLTHR),
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#endif
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/* Older HP-UX versions. */
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#ifdef SIGDIL
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NUMNAME (DIL),
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#endif
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/* Korn shell and Bash, of uncertain vintage. */
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{ 0, "EXIT" }
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};
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#define NUMNAME_ENTRIES (sizeof numname_table / sizeof numname_table[0])
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/* ISDIGIT differs from isdigit, as follows:
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- Its arg may be any int or unsigned int; it need not be an unsigned char
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or EOF.
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- It's typically faster.
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POSIX says that only '0' through '9' are digits. Prefer ISDIGIT to
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isdigit unless it's important to use the locale's definition
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of "digit" even when the host does not conform to POSIX. */
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#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
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/* Convert the signal name SIGNAME to a signal number. Return the
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signal number if successful, -1 otherwise. */
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static int
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str2signum (char const *signame)
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{
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if (ISDIGIT (*signame))
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{
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char *endp;
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long int n = strtol (signame, &endp, 10);
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if (! *endp && n <= SIGNUM_BOUND)
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return n;
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}
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else
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{
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unsigned int i;
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for (i = 0; i < NUMNAME_ENTRIES; i++)
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if (strcmp (numname_table[i].name, signame) == 0)
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return numname_table[i].num;
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{
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char *endp;
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int rtmin = SIGRTMIN;
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int rtmax = SIGRTMAX;
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if (0 < rtmin && strncmp (signame, "RTMIN", 5) == 0)
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{
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long int n = strtol (signame + 5, &endp, 10);
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if (! *endp && 0 <= n && n <= rtmax - rtmin)
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return rtmin + n;
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}
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else if (0 < rtmax && strncmp (signame, "RTMAX", 5) == 0)
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{
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long int n = strtol (signame + 5, &endp, 10);
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if (! *endp && rtmin - rtmax <= n && n <= 0)
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return rtmax + n;
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}
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}
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}
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return -1;
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}
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/* Convert the signal name SIGNAME to the signal number *SIGNUM.
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Return 0 if successful, -1 otherwise. */
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int
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str2sig (char const *signame, int *signum)
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{
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*signum = str2signum (signame);
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return *signum < 0 ? -1 : 0;
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}
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/* Convert SIGNUM to a signal name in SIGNAME. SIGNAME must point to
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a buffer of at least SIG2STR_MAX bytes. Return 0 if successful, -1
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otherwise. */
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int
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sig2str (int signum, char *signame)
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{
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unsigned int i;
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for (i = 0; i < NUMNAME_ENTRIES; i++)
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if (numname_table[i].num == signum)
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{
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strcpy (signame, numname_table[i].name);
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return 0;
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}
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{
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int rtmin = SIGRTMIN;
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int rtmax = SIGRTMAX;
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int base, delta;
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if (! (rtmin <= signum && signum <= rtmax))
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return -1;
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if (signum <= rtmin + (rtmax - rtmin) / 2)
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{
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strcpy (signame, "RTMIN");
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base = rtmin;
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}
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else
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{
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strcpy (signame, "RTMAX");
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base = rtmax;
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}
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delta = signum - base;
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if (delta != 0)
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sprintf (signame + 5, "%+d", delta);
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return 0;
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}
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}
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