226 lines
6.1 KiB
C
226 lines
6.1 KiB
C
/*
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* sigstat - print out useful information about signal arguments
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*
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* Chet Ramey
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* chet@po.cwru.edu
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*/
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/* Copyright (C) 1991-2009 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash 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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Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/types.h>
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#include <signal.h>
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#include <stdio.h>
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extern char *strrchr();
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static char *signames[NSIG];
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char *progname;
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void sigstat();
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main(argc, argv)
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int argc;
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char **argv;
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{
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register int i;
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char *t;
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if (t = strrchr(argv[0], '/'))
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progname = ++t;
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else
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progname = argv[0];
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init_signames();
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if (argc == 1) {
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for (i = 1; i < NSIG; i++)
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sigstat(i);
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exit(0);
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}
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for (i = 1; i < argc; i++)
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sigstat(atoi(argv[i]));
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exit(0);
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}
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void
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sigstat(sig)
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int sig;
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{
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struct sigaction oact;
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char *signame;
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sigset_t set, oset;
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int blocked;
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if (sig < 0 || sig >= NSIG) {
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fprintf(stderr, "%s: %d: signal out of range\n", progname, sig);
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return;
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}
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signame = signames[sig];
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sigemptyset(&oset);
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sigprocmask(SIG_BLOCK, (sigset_t *)NULL, &oset);
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if (sigismember(&oset, sig))
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printf("%s: signal is blocked\n", signame);
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sigaction(sig, (struct sigaction *)NULL, &oact);
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if (oact.sa_handler == SIG_IGN)
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printf("%s: signal is ignored\n", signame);
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else if (oact.sa_handler == SIG_DFL)
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printf("%s: signal is defaulted\n", signame);
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else
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printf("%s: signal is trapped (?)\n", signame);
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}
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init_signames()
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{
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register int i;
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bzero(signames, sizeof(signames));
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#if defined (SIGHUP) /* hangup */
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signames[SIGHUP] = "SIGHUP";
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#endif
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#if defined (SIGINT) /* interrupt */
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signames[SIGINT] = "SIGINT";
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#endif
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#if defined (SIGQUIT) /* quit */
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signames[SIGQUIT] = "SIGQUIT";
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#endif
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#if defined (SIGILL) /* illegal instruction (not reset when caught) */
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signames[SIGILL] = "SIGILL";
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#endif
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#if defined (SIGTRAP) /* trace trap (not reset when caught) */
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signames[SIGTRAP] = "SIGTRAP";
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#endif
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#if defined (SIGABRT) /* */
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signames[SIGABRT] = "SIGABRT";
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#endif
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#if defined (SIGIOT) /* IOT instruction */
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signames[SIGIOT] = "SIGIOT";
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#endif
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#if defined (SIGEMT) /* EMT instruction */
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signames[SIGEMT] = "SIGEMT";
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#endif
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#if defined (SIGFPE) /* floating point exception */
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signames[SIGFPE] = "SIGFPE";
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#endif
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#if defined (SIGKILL) /* kill (cannot be caught or ignored) */
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signames[SIGKILL] = "SIGKILL";
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#endif
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#if defined (SIGBUS) /* bus error */
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signames[SIGBUS] = "SIGBUS";
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#endif
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#if defined (SIGSEGV) /* segmentation violation */
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signames[SIGSEGV] = "SIGSEGV";
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#endif
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#if defined (SIGSYS) /* bad argument to system call */
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signames[SIGSYS] = "SIGSYS";
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#endif
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#if defined (SIGPIPE) /* write on a pipe with no one to read it */
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signames[SIGPIPE] = "SIGPIPE";
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#endif
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#if defined (SIGALRM) /* alarm clock */
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signames[SIGALRM] = "SIGALRM";
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#endif
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#if defined (SIGTERM) /* software termination signal from kill */
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signames[SIGTERM] = "SIGTERM";
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#endif
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#if defined (SIGCLD) /* Like SIGCHLD. */
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signames[SIGCLD] = "SIGCLD";
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#endif
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#if defined (SIGPWR) /* Magic thing for some machines. */
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signames[SIGPWR] = "SIGPWR";
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#endif
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#if defined (SIGPOLL) /* For keyboard input? */
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signames[SIGPOLL] = "SIGPOLL";
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#endif
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#if defined (SIGURG) /* urgent condition on IO channel */
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signames[SIGURG] = "SIGURG";
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#endif
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#if defined (SIGSTOP) /* sendable stop signal not from tty */
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signames[SIGSTOP] = "SIGSTOP";
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#endif
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#if defined (SIGTSTP) /* stop signal from tty */
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signames[SIGTSTP] = "SIGTSTP";
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#endif
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#if defined (SIGCONT) /* continue a stopped process */
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signames[SIGCONT] = "SIGCONT";
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#endif
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#if defined (SIGCHLD) /* to parent on child stop or exit */
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signames[SIGCHLD] = "SIGCHLD";
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#endif
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#if defined (SIGTTIN) /* to readers pgrp upon background tty read */
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signames[SIGTTIN] = "SIGTTIN";
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#endif
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#if defined (SIGTTOU) /* like TTIN for output if (tp->t_local<OSTOP) */
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signames[SIGTTOU] = "SIGTTOU";
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#endif
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#if defined (SIGIO) /* input/output possible signal */
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signames[SIGIO] = "SIGIO";
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#endif
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#if defined (SIGXCPU) /* exceeded CPU time limit */
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signames[SIGXCPU] = "SIGXCPU";
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#endif
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#if defined (SIGXFSZ) /* exceeded file size limit */
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signames[SIGXFSZ] = "SIGXFSZ";
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#endif
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#if defined (SIGVTALRM) /* virtual time alarm */
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signames[SIGVTALRM] = "SIGVTALRM";
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#endif
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#if defined (SIGPROF) /* profiling time alarm */
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signames[SIGPROF] = "SIGPROF";
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#endif
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#if defined (SIGWINCH) /* window changed */
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signames[SIGWINCH] = "SIGWINCH";
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#endif
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#if defined (SIGLOST) /* resource lost (eg, record-lock lost) */
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signames[SIGLOST] = "SIGLOST";
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#endif
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#if defined (SIGUSR1) /* user defined signal 1 */
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signames[SIGUSR1] = "SIGUSR1";
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#endif
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#if defined (SIGUSR2) /* user defined signal 2 */
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signames[SIGUSR2] = "SIGUSR2";
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#endif
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#if defined (SIGMSG) /* HFT input data pending */
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signames[SIGMSG] = "SIGMSG";
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#endif
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#if defined (SIGPWR) /* power failure imminent (save your data) */
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signames[SIGPWR] = "SIGPWR";
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#endif
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#if defined (SIGDANGER) /* system crash imminent */
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signames[SIGDANGER] = "SIGDANGER";
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#endif
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#if defined (SIGMIGRATE) /* migrate process to another CPU */
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signames[SIGMIGRATE] = "SIGMIGRATE";
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#endif
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#if defined (SIGPRE) /* programming error */
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signames[SIGPRE] = "SIGPRE";
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#endif
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#if defined (SIGGRANT) /* HFT monitor mode granted */
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signames[SIGGRANT] = "SIGGRANT";
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#endif
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#if defined (SIGRETRACT) /* HFT monitor mode retracted */
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signames[SIGRETRACT] = "SIGRETRACT";
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#endif
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#if defined (SIGSOUND) /* HFT sound sequence has completed */
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signames[SIGSOUND] = "SIGSOUND";
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#endif
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for (i = 0; i < NSIG; i++)
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if (signames[i] == (char *)NULL) {
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signames[i] = (char *)malloc (16);;
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sprintf (signames[i], "signal %d", i);
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}
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}
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