lib/signames.c

   1 /*
   2  * No copyright is claimed.  This code is in the public domain; do with
   3  * it what you wish.
   4
   5  * Written by:
   6  *  Sami Kerola <kerolasa@iki.fi>
   7  *  Karel Zak <kzak@redhat.com>
   8  *  Niklas Hambüchen <mail@nh2.me>
   9  */
  10
  11 #include <ctype.h>              /* for isdigit() */
  12 #include <signal.h>
  13 #include <unistd.h>
  14 #include <string.h>
  15 #include <errno.h>
  16
  17 #include "c.h"
  18 #include "cctype.h"
  19 #include "strutils.h"
  20 #include "signames.h"
  21
  22 static const struct ul_signal_name {
  23         const char *name;
  24         int val;
  25 } ul_signames[] = {
  26         /* POSIX signals */
  27         { "HUP",        SIGHUP },       /* 1 */
  28         { "INT",        SIGINT },       /* 2 */
  29         { "QUIT",       SIGQUIT },      /* 3 */
  30         { "ILL",        SIGILL },       /* 4 */
  31 #ifdef SIGTRAP
  32         { "TRAP",       SIGTRAP },      /* 5 */
  33 #endif
  34         { "ABRT",       SIGABRT },      /* 6 */
  35 #ifdef SIGIOT
  36         { "IOT",        SIGIOT },       /* 6, same as SIGABRT */
  37 #endif
  38 #ifdef SIGEMT
  39         { "EMT",        SIGEMT },       /* 7 (mips,alpha,sparc*) */
  40 #endif
  41 #ifdef SIGBUS
  42         { "BUS",        SIGBUS },       /* 7 (arm,i386,m68k,ppc), 10 (mips,alpha,sparc*) */
  43 #endif
  44         { "FPE",        SIGFPE },       /* 8 */
  45         { "KILL",       SIGKILL },      /* 9 */
  46         { "USR1",       SIGUSR1 },      /* 10 (arm,i386,m68k,ppc), 30 (alpha,sparc*), 16 (mips) */
  47         { "SEGV",       SIGSEGV },      /* 11 */
  48         { "USR2",       SIGUSR2 },      /* 12 (arm,i386,m68k,ppc), 31 (alpha,sparc*), 17 (mips) */
  49         { "PIPE",       SIGPIPE },      /* 13 */
  50         { "ALRM",       SIGALRM },      /* 14 */
  51         { "TERM",       SIGTERM },      /* 15 */
  52 #ifdef SIGSTKFLT
  53         { "STKFLT",     SIGSTKFLT },    /* 16 (arm,i386,m68k,ppc) */
  54 #endif
  55         { "CHLD",       SIGCHLD },      /* 17 (arm,i386,m68k,ppc), 20 (alpha,sparc*), 18 (mips) */
  56 #ifdef SIGCLD
  57         { "CLD",        SIGCLD },       /* same as SIGCHLD (mips) */
  58 #endif
  59         { "CONT",       SIGCONT },      /* 18 (arm,i386,m68k,ppc), 19 (alpha,sparc*), 25 (mips) */
  60         { "STOP",       SIGSTOP },      /* 19 (arm,i386,m68k,ppc), 17 (alpha,sparc*), 23 (mips) */
  61         { "TSTP",       SIGTSTP },      /* 20 (arm,i386,m68k,ppc), 18 (alpha,sparc*), 24 (mips) */
  62         { "TTIN",       SIGTTIN },      /* 21 (arm,i386,m68k,ppc,alpha,sparc*), 26 (mips) */
  63         { "TTOU",       SIGTTOU },      /* 22 (arm,i386,m68k,ppc,alpha,sparc*), 27 (mips) */
  64 #ifdef SIGURG
  65         { "URG",        SIGURG },       /* 23 (arm,i386,m68k,ppc), 16 (alpha,sparc*), 21 (mips) */
  66 #endif
  67 #ifdef SIGXCPU
  68         { "XCPU",       SIGXCPU },      /* 24 (arm,i386,m68k,ppc,alpha,sparc*), 30 (mips) */
  69 #endif
  70 #ifdef SIGXFSZ
  71         { "XFSZ",       SIGXFSZ },      /* 25 (arm,i386,m68k,ppc,alpha,sparc*), 31 (mips) */
  72 #endif
  73 #ifdef SIGVTALRM
  74         { "VTALRM",     SIGVTALRM },    /* 26 (arm,i386,m68k,ppc,alpha,sparc*), 28 (mips) */
  75 #endif
  76 #ifdef SIGPROF
  77         { "PROF",       SIGPROF },      /* 27 (arm,i386,m68k,ppc,alpha,sparc*), 29 (mips) */
  78 #endif
  79 #ifdef SIGWINCH
  80         { "WINCH",      SIGWINCH },     /* 28 (arm,i386,m68k,ppc,alpha,sparc*), 20 (mips) */
  81 #endif
  82 #ifdef SIGIO
  83         { "IO",         SIGIO },        /* 29 (arm,i386,m68k,ppc), 23 (alpha,sparc*), 22 (mips) */
  84 #endif
  85 #ifdef SIGPOLL
  86         { "POLL",       SIGPOLL },      /* same as SIGIO */
  87 #endif
  88 #ifdef SIGINFO
  89         { "INFO",       SIGINFO },      /* 29 (alpha) */
  90 #endif
  91 #ifdef SIGLOST
  92         { "LOST",       SIGLOST },      /* 29 (arm,i386,m68k,ppc,sparc*) */
  93 #endif
  94 #ifdef SIGPWR
  95         { "PWR",        SIGPWR },       /* 30 (arm,i386,m68k,ppc), 29 (alpha,sparc*), 19 (mips) */
  96 #endif
  97 #ifdef SIGUNUSED
  98         { "UNUSED",     SIGUNUSED },    /* 31 (arm,i386,m68k,ppc) */
  99 #endif
 100 #ifdef SIGSYS
 101         { "SYS",        SIGSYS },       /* 31 (mips,alpha,sparc*) */
 102 #endif
 103 };
 104
 105 #ifdef SIGRTMIN
 106 static int rtsig_to_signum(const char *sig)
 107 {
 108         int num, maxi = 0;
 109         char *ep = NULL;
 110
 111         if (c_strncasecmp(sig, "min+", 4) == 0)
 112                 sig += 4;
 113         else if (c_strncasecmp(sig, "max-", 4) == 0) {
 114                 sig += 4;
 115                 maxi = 1;
 116         }
 117         if (!isdigit(*sig))
 118                 return -1;
 119         errno = 0;
 120         num = strtol(sig, &ep, 10);
 121         if (!ep || sig == ep || errno || num < 0)
 122                 return -1;
 123         num = maxi ? SIGRTMAX - num : SIGRTMIN + num;
 124         if (num < SIGRTMIN || SIGRTMAX < num)
 125                 return -1;
 126         return num;
 127 }
 128 #endif
 129
 130 int signame_to_signum(const char *sig)
 131 {
 132         size_t n;
 133
 134         if (!c_strncasecmp(sig, "sig", 3))
 135                 sig += 3;
 136 #ifdef SIGRTMIN
 137         /* RT signals */
 138         if (!c_strncasecmp(sig, "rt", 2))
 139                 return rtsig_to_signum(sig + 2);
 140 #endif
 141         /* Normal signals */
 142         for (n = 0; n < ARRAY_SIZE(ul_signames); n++) {
 143                 if (!c_strcasecmp(ul_signames[n].name, sig))
 144                         return ul_signames[n].val;
 145         }
 146         return -1;
 147 }
 148
 149 const char *signum_to_signame(int signum)
 150 {
 151         size_t n;
 152
 153         for (n = 0; n < ARRAY_SIZE(ul_signames); n++) {
 154                 if (ul_signames[n].val == signum) {
 155                         return ul_signames[n].name;
 156                 }
 157         }
 158
 159         return NULL;
 160 }
 161
 162 int get_signame_by_idx(size_t idx, const char **signame, int *signum)
 163 {
 164         if (idx >= ARRAY_SIZE(ul_signames))
 165                 return -1;
 166
 167         if (signame)
 168                 *signame = ul_signames[idx].name;
 169         if (signum)
 170                 *signum = ul_signames[idx].val;
 171         return 0;
 172
 173 }
 174