source: trunk/essentials/app-shells/bash/CWRU/misc/sigstat.c@ 3231

Last change on this file since 3231 was 3231, checked in by bird, 19 years ago

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Line 
1/*
2 * sigstat - print out useful information about signal arguments
3 *
4 * Chet Ramey
5 * [email protected]
6 */
7
8/* Copyright (C) 1991-2002 Free Software Foundation, Inc.
9
10 This file is part of GNU Bash, the Bourne Again SHell.
11
12 Bash is free software; you can redistribute it and/or modify it under
13 the terms of the GNU General Public License as published by the Free
14 Software Foundation; either version 2, or (at your option) any later
15 version.
16
17 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
18 WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 for more details.
21
22 You should have received a copy of the GNU General Public License along
23 with Bash; see the file COPYING. If not, write to the Free Software
24 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
25
26#include <sys/types.h>
27#include <signal.h>
28#include <stdio.h>
29
30extern char *strrchr();
31static char *signames[NSIG];
32
33char *progname;
34
35void sigstat();
36
37main(argc, argv)
38int argc;
39char **argv;
40{
41 register int i;
42 char *t;
43
44 if (t = strrchr(argv[0], '/'))
45 progname = ++t;
46 else
47 progname = argv[0];
48 init_signames();
49 if (argc == 1) {
50 for (i = 1; i < NSIG; i++)
51 sigstat(i);
52 exit(0);
53 }
54 for (i = 1; i < argc; i++)
55 sigstat(atoi(argv[i]));
56 exit(0);
57}
58
59void
60sigstat(sig)
61int sig;
62{
63 struct sigaction oact;
64 char *signame;
65 sigset_t set, oset;
66 int blocked;
67
68 if (sig < 0 || sig >= NSIG) {
69 fprintf(stderr, "%s: %d: signal out of range\n", progname, sig);
70 return;
71 }
72 signame = signames[sig];
73 sigemptyset(&oset);
74 sigprocmask(SIG_BLOCK, (sigset_t *)NULL, &oset);
75 if (sigismember(&oset, sig))
76 printf("%s: signal is blocked\n", signame);
77 sigaction(sig, (struct sigaction *)NULL, &oact);
78 if (oact.sa_handler == SIG_IGN)
79 printf("%s: signal is ignored\n", signame);
80 else if (oact.sa_handler == SIG_DFL)
81 printf("%s: signal is defaulted\n", signame);
82 else
83 printf("%s: signal is trapped (?)\n", signame);
84}
85
86init_signames()
87{
88 register int i;
89 bzero(signames, sizeof(signames));
90
91#if defined (SIGHUP) /* hangup */
92 signames[SIGHUP] = "SIGHUP";
93#endif
94#if defined (SIGINT) /* interrupt */
95 signames[SIGINT] = "SIGINT";
96#endif
97#if defined (SIGQUIT) /* quit */
98 signames[SIGQUIT] = "SIGQUIT";
99#endif
100#if defined (SIGILL) /* illegal instruction (not reset when caught) */
101 signames[SIGILL] = "SIGILL";
102#endif
103#if defined (SIGTRAP) /* trace trap (not reset when caught) */
104 signames[SIGTRAP] = "SIGTRAP";
105#endif
106#if defined (SIGABRT) /* */
107 signames[SIGABRT] = "SIGABRT";
108#endif
109#if defined (SIGIOT) /* IOT instruction */
110 signames[SIGIOT] = "SIGIOT";
111#endif
112#if defined (SIGEMT) /* EMT instruction */
113 signames[SIGEMT] = "SIGEMT";
114#endif
115#if defined (SIGFPE) /* floating point exception */
116 signames[SIGFPE] = "SIGFPE";
117#endif
118#if defined (SIGKILL) /* kill (cannot be caught or ignored) */
119 signames[SIGKILL] = "SIGKILL";
120#endif
121#if defined (SIGBUS) /* bus error */
122 signames[SIGBUS] = "SIGBUS";
123#endif
124#if defined (SIGSEGV) /* segmentation violation */
125 signames[SIGSEGV] = "SIGSEGV";
126#endif
127#if defined (SIGSYS) /* bad argument to system call */
128 signames[SIGSYS] = "SIGSYS";
129#endif
130#if defined (SIGPIPE) /* write on a pipe with no one to read it */
131 signames[SIGPIPE] = "SIGPIPE";
132#endif
133#if defined (SIGALRM) /* alarm clock */
134 signames[SIGALRM] = "SIGALRM";
135#endif
136#if defined (SIGTERM) /* software termination signal from kill */
137 signames[SIGTERM] = "SIGTERM";
138#endif
139#if defined (SIGCLD) /* Like SIGCHLD. */
140 signames[SIGCLD] = "SIGCLD";
141#endif
142#if defined (SIGPWR) /* Magic thing for some machines. */
143 signames[SIGPWR] = "SIGPWR";
144#endif
145#if defined (SIGPOLL) /* For keyboard input? */
146 signames[SIGPOLL] = "SIGPOLL";
147#endif
148#if defined (SIGURG) /* urgent condition on IO channel */
149 signames[SIGURG] = "SIGURG";
150#endif
151#if defined (SIGSTOP) /* sendable stop signal not from tty */
152 signames[SIGSTOP] = "SIGSTOP";
153#endif
154#if defined (SIGTSTP) /* stop signal from tty */
155 signames[SIGTSTP] = "SIGTSTP";
156#endif
157#if defined (SIGCONT) /* continue a stopped process */
158 signames[SIGCONT] = "SIGCONT";
159#endif
160#if defined (SIGCHLD) /* to parent on child stop or exit */
161 signames[SIGCHLD] = "SIGCHLD";
162#endif
163#if defined (SIGTTIN) /* to readers pgrp upon background tty read */
164 signames[SIGTTIN] = "SIGTTIN";
165#endif
166#if defined (SIGTTOU) /* like TTIN for output if (tp->t_local&LTOSTOP) */
167 signames[SIGTTOU] = "SIGTTOU";
168#endif
169#if defined (SIGIO) /* input/output possible signal */
170 signames[SIGIO] = "SIGIO";
171#endif
172#if defined (SIGXCPU) /* exceeded CPU time limit */
173 signames[SIGXCPU] = "SIGXCPU";
174#endif
175#if defined (SIGXFSZ) /* exceeded file size limit */
176 signames[SIGXFSZ] = "SIGXFSZ";
177#endif
178#if defined (SIGVTALRM) /* virtual time alarm */
179 signames[SIGVTALRM] = "SIGVTALRM";
180#endif
181#if defined (SIGPROF) /* profiling time alarm */
182 signames[SIGPROF] = "SIGPROF";
183#endif
184#if defined (SIGWINCH) /* window changed */
185 signames[SIGWINCH] = "SIGWINCH";
186#endif
187#if defined (SIGLOST) /* resource lost (eg, record-lock lost) */
188 signames[SIGLOST] = "SIGLOST";
189#endif
190#if defined (SIGUSR1) /* user defined signal 1 */
191 signames[SIGUSR1] = "SIGUSR1";
192#endif
193#if defined (SIGUSR2) /* user defined signal 2 */
194 signames[SIGUSR2] = "SIGUSR2";
195#endif
196#if defined (SIGMSG) /* HFT input data pending */
197 signames[SIGMSG] = "SIGMSG";
198#endif
199#if defined (SIGPWR) /* power failure imminent (save your data) */
200 signames[SIGPWR] = "SIGPWR";
201#endif
202#if defined (SIGDANGER) /* system crash imminent */
203 signames[SIGDANGER] = "SIGDANGER";
204#endif
205#if defined (SIGMIGRATE) /* migrate process to another CPU */
206 signames[SIGMIGRATE] = "SIGMIGRATE";
207#endif
208#if defined (SIGPRE) /* programming error */
209 signames[SIGPRE] = "SIGPRE";
210#endif
211#if defined (SIGGRANT) /* HFT monitor mode granted */
212 signames[SIGGRANT] = "SIGGRANT";
213#endif
214#if defined (SIGRETRACT) /* HFT monitor mode retracted */
215 signames[SIGRETRACT] = "SIGRETRACT";
216#endif
217#if defined (SIGSOUND) /* HFT sound sequence has completed */
218 signames[SIGSOUND] = "SIGSOUND";
219#endif
220
221 for (i = 0; i < NSIG; i++)
222 if (signames[i] == (char *)NULL) {
223 signames[i] = (char *)malloc (16);;
224 sprintf (signames[i], "signal %d", i);
225 }
226}
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