lib/signames.c

   1 /*
   2  * Copyright (c) 1988, 1993, 1994, 2017
   3  *  The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *  This product includes software developed by the University of
  16  *  California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33 /*
  34  *  2017-10-14 Niklas Hambüchen <mail@nh2.me>
  35  *  - Extracted signal names mapping from kill.c
  36  *
  37  * Copyright (C) 2014 Sami Kerola <kerolasa@iki.fi>
  38  * Copyright (C) 2014 Karel Zak <kzak@redhat.com>
  39  * Copyright (C) 2017 Niklas Hambüchen <mail@nh2.me>
  40  */
  41
  42 #include <ctype.h>              /* for isdigit() */
  43 #include <signal.h>
  44 #include <unistd.h>
  45 #include <string.h>
  46 #include <errno.h>
  47
  48 #include "c.h"
  49 #include "strutils.h"
  50 #include "signames.h"
  51
  52 static const struct ul_signal_name {
  53         const char *name;
  54         int val;
  55 } ul_signames[] = {
  56         /* POSIX signals */
  57         { "HUP",        SIGHUP },       /* 1 */
  58         { "INT",        SIGINT },       /* 2 */
  59         { "QUIT",       SIGQUIT },      /* 3 */
  60         { "ILL",        SIGILL },       /* 4 */
  61 #ifdef SIGTRAP
  62         { "TRAP",       SIGTRAP },      /* 5 */
  63 #endif
  64         { "ABRT",       SIGABRT },      /* 6 */
  65 #ifdef SIGIOT
  66         { "IOT",        SIGIOT },       /* 6, same as SIGABRT */
  67 #endif
  68 #ifdef SIGEMT
  69         { "EMT",        SIGEMT },       /* 7 (mips,alpha,sparc*) */
  70 #endif
  71 #ifdef SIGBUS
  72         { "BUS",        SIGBUS },       /* 7 (arm,i386,m68k,ppc), 10 (mips,alpha,sparc*) */
  73 #endif
  74         { "FPE",        SIGFPE },       /* 8 */
  75         { "KILL",       SIGKILL },      /* 9 */
  76         { "USR1",       SIGUSR1 },      /* 10 (arm,i386,m68k,ppc), 30 (alpha,sparc*), 16 (mips) */
  77         { "SEGV",       SIGSEGV },      /* 11 */
  78         { "USR2",       SIGUSR2 },      /* 12 (arm,i386,m68k,ppc), 31 (alpha,sparc*), 17 (mips) */
  79         { "PIPE",       SIGPIPE },      /* 13 */
  80         { "ALRM",       SIGALRM },      /* 14 */
  81         { "TERM",       SIGTERM },      /* 15 */
  82 #ifdef SIGSTKFLT
  83         { "STKFLT",     SIGSTKFLT },    /* 16 (arm,i386,m68k,ppc) */
  84 #endif
  85         { "CHLD",       SIGCHLD },      /* 17 (arm,i386,m68k,ppc), 20 (alpha,sparc*), 18 (mips) */
  86 #ifdef SIGCLD
  87         { "CLD",        SIGCLD },       /* same as SIGCHLD (mips) */
  88 #endif
  89         { "CONT",       SIGCONT },      /* 18 (arm,i386,m68k,ppc), 19 (alpha,sparc*), 25 (mips) */
  90         { "STOP",       SIGSTOP },      /* 19 (arm,i386,m68k,ppc), 17 (alpha,sparc*), 23 (mips) */
  91         { "TSTP",       SIGTSTP },      /* 20 (arm,i386,m68k,ppc), 18 (alpha,sparc*), 24 (mips) */
  92         { "TTIN",       SIGTTIN },      /* 21 (arm,i386,m68k,ppc,alpha,sparc*), 26 (mips) */
  93         { "TTOU",       SIGTTOU },      /* 22 (arm,i386,m68k,ppc,alpha,sparc*), 27 (mips) */
  94 #ifdef SIGURG
  95         { "URG",        SIGURG },       /* 23 (arm,i386,m68k,ppc), 16 (alpha,sparc*), 21 (mips) */
  96 #endif
  97 #ifdef SIGXCPU
  98         { "XCPU",       SIGXCPU },      /* 24 (arm,i386,m68k,ppc,alpha,sparc*), 30 (mips) */
  99 #endif
 100 #ifdef SIGXFSZ
 101         { "XFSZ",       SIGXFSZ },      /* 25 (arm,i386,m68k,ppc,alpha,sparc*), 31 (mips) */
 102 #endif
 103 #ifdef SIGVTALRM
 104         { "VTALRM",     SIGVTALRM },    /* 26 (arm,i386,m68k,ppc,alpha,sparc*), 28 (mips) */
 105 #endif
 106 #ifdef SIGPROF
 107         { "PROF",       SIGPROF },      /* 27 (arm,i386,m68k,ppc,alpha,sparc*), 29 (mips) */
 108 #endif
 109 #ifdef SIGWINCH
 110         { "WINCH",      SIGWINCH },     /* 28 (arm,i386,m68k,ppc,alpha,sparc*), 20 (mips) */
 111 #endif
 112 #ifdef SIGIO
 113         { "IO",         SIGIO },        /* 29 (arm,i386,m68k,ppc), 23 (alpha,sparc*), 22 (mips) */
 114 #endif
 115 #ifdef SIGPOLL
 116         { "POLL",       SIGPOLL },      /* same as SIGIO */
 117 #endif
 118 #ifdef SIGINFO
 119         { "INFO",       SIGINFO },      /* 29 (alpha) */
 120 #endif
 121 #ifdef SIGLOST
 122         { "LOST",       SIGLOST },      /* 29 (arm,i386,m68k,ppc,sparc*) */
 123 #endif
 124 #ifdef SIGPWR
 125         { "PWR",        SIGPWR },       /* 30 (arm,i386,m68k,ppc), 29 (alpha,sparc*), 19 (mips) */
 126 #endif
 127 #ifdef SIGUNUSED
 128         { "UNUSED",     SIGUNUSED },    /* 31 (arm,i386,m68k,ppc) */
 129 #endif
 130 #ifdef SIGSYS
 131         { "SYS",        SIGSYS },       /* 31 (mips,alpha,sparc*) */
 132 #endif
 133 };
 134
 135 #ifdef SIGRTMIN
 136 static int rtsig_to_signum(const char *sig)
 137 {
 138         int num, maxi = 0;
 139         char *ep = NULL;
 140
 141         if (strncasecmp(sig, "min+", 4) == 0)
 142                 sig += 4;
 143         else if (strncasecmp(sig, "max-", 4) == 0) {
 144                 sig += 4;
 145                 maxi = 1;
 146         }
 147         if (!isdigit(*sig))
 148                 return -1;
 149         errno = 0;
 150         num = strtol(sig, &ep, 10);
 151         if (!ep || sig == ep || errno || num < 0)
 152                 return -1;
 153         num = maxi ? SIGRTMAX - num : SIGRTMIN + num;
 154         if (num < SIGRTMIN || SIGRTMAX < num)
 155                 return -1;
 156         return num;
 157 }
 158 #endif
 159
 160 int signame_to_signum(const char *sig)
 161 {
 162         size_t n;
 163
 164         if (!strncasecmp(sig, "sig", 3))
 165                 sig += 3;
 166 #ifdef SIGRTMIN
 167         /* RT signals */
 168         if (!strncasecmp(sig, "rt", 2))
 169                 return rtsig_to_signum(sig + 2);
 170 #endif
 171         /* Normal signals */
 172         for (n = 0; n < ARRAY_SIZE(ul_signames); n++) {
 173                 if (!strcasecmp(ul_signames[n].name, sig))
 174                         return ul_signames[n].val;
 175         }
 176         return -1;
 177 }
 178
 179 const char *signum_to_signame(int signum)
 180 {
 181         size_t n;
 182
 183         for (n = 0; n < ARRAY_SIZE(ul_signames); n++) {
 184                 if (ul_signames[n].val == signum) {
 185                         return ul_signames[n].name;
 186                 }
 187         }
 188
 189         return NULL;
 190 }
 191
 192 int get_signame_by_idx(size_t idx, const char **signame, int *signum)
 193 {
 194         if (idx >= ARRAY_SIZE(ul_signames))
 195                 return -1;
 196
 197         if (signame)
 198                 *signame = ul_signames[idx].name;
 199         if (signum)
 200                 *signum = ul_signames[idx].val;
 201         return 0;
 202
 203 }
 204