[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) many different people.
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| 6 | * If you wrote this, please acknowledge your work.
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| 7 | *
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| 8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 9 | */
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| 10 |
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| 11 | #include <signal.h>
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| 12 | #include <ctype.h>
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| 13 | #include <string.h>
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| 14 | #include <strings.h>
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| 15 | #include <stdlib.h>
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| 16 | #include <stdio.h>
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| 17 |
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| 18 | #include "libbb.h"
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| 19 |
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| 20 | struct signal_name {
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| 21 | const char *name;
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| 22 | int number;
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| 23 | };
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| 24 |
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| 25 | static const struct signal_name signames[] = {
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| 26 | /* POSIX signals */
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| 27 | { "EXIT", 0 }, /* 0 */
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| 28 | { "HUP", SIGHUP }, /* 1 */
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| 29 | { "INT", SIGINT }, /* 2 */
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| 30 | { "QUIT", SIGQUIT }, /* 3 */
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| 31 | { "ILL", SIGILL }, /* 4 */
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| 32 | { "ABRT", SIGABRT }, /* 6 */
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| 33 | { "FPE", SIGFPE }, /* 8 */
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| 34 | { "KILL", SIGKILL }, /* 9 */
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| 35 | { "SEGV", SIGSEGV }, /* 11 */
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| 36 | { "PIPE", SIGPIPE }, /* 13 */
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| 37 | { "ALRM", SIGALRM }, /* 14 */
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| 38 | { "TERM", SIGTERM }, /* 15 */
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| 39 | { "USR1", SIGUSR1 }, /* 10 (arm,i386,m68k,ppc), 30 (alpha,sparc*), 16 (mips) */
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| 40 | { "USR2", SIGUSR2 }, /* 12 (arm,i386,m68k,ppc), 31 (alpha,sparc*), 17 (mips) */
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| 41 | { "CHLD", SIGCHLD }, /* 17 (arm,i386,m68k,ppc), 20 (alpha,sparc*), 18 (mips) */
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| 42 | { "CONT", SIGCONT }, /* 18 (arm,i386,m68k,ppc), 19 (alpha,sparc*), 25 (mips) */
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| 43 | { "STOP", SIGSTOP }, /* 19 (arm,i386,m68k,ppc), 17 (alpha,sparc*), 23 (mips) */
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| 44 | { "TSTP", SIGTSTP }, /* 20 (arm,i386,m68k,ppc), 18 (alpha,sparc*), 24 (mips) */
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| 45 | { "TTIN", SIGTTIN }, /* 21 (arm,i386,m68k,ppc,alpha,sparc*), 26 (mips) */
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| 46 | { "TTOU", SIGTTOU }, /* 22 (arm,i386,m68k,ppc,alpha,sparc*), 27 (mips) */
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| 47 | /* Miscellaneous other signals */
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| 48 | #ifdef SIGTRAP
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| 49 | { "TRAP", SIGTRAP }, /* 5 */
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| 50 | #endif
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| 51 | #ifdef SIGIOT
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| 52 | { "IOT", SIGIOT }, /* 6, same as SIGABRT */
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| 53 | #endif
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| 54 | #ifdef SIGEMT
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| 55 | { "EMT", SIGEMT }, /* 7 (mips,alpha,sparc*) */
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| 56 | #endif
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| 57 | #ifdef SIGBUS
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| 58 | { "BUS", SIGBUS }, /* 7 (arm,i386,m68k,ppc), 10 (mips,alpha,sparc*) */
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| 59 | #endif
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| 60 | #ifdef SIGSYS
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| 61 | { "SYS", SIGSYS }, /* 12 (mips,alpha,sparc*) */
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| 62 | #endif
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| 63 | #ifdef SIGSTKFLT
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| 64 | { "STKFLT", SIGSTKFLT }, /* 16 (arm,i386,m68k,ppc) */
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| 65 | #endif
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| 66 | #ifdef SIGURG
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| 67 | { "URG", SIGURG }, /* 23 (arm,i386,m68k,ppc), 16 (alpha,sparc*), 21 (mips) */
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| 68 | #endif
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| 69 | #ifdef SIGIO
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| 70 | { "IO", SIGIO }, /* 29 (arm,i386,m68k,ppc), 23 (alpha,sparc*), 22 (mips) */
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| 71 | #endif
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| 72 | #ifdef SIGPOLL
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| 73 | { "POLL", SIGPOLL }, /* same as SIGIO */
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| 74 | #endif
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| 75 | #ifdef SIGCLD
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| 76 | { "CLD", SIGCLD }, /* same as SIGCHLD (mips) */
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| 77 | #endif
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| 78 | #ifdef SIGXCPU
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| 79 | { "XCPU", SIGXCPU }, /* 24 (arm,i386,m68k,ppc,alpha,sparc*), 30 (mips) */
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| 80 | #endif
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| 81 | #ifdef SIGXFSZ
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| 82 | { "XFSZ", SIGXFSZ }, /* 25 (arm,i386,m68k,ppc,alpha,sparc*), 31 (mips) */
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| 83 | #endif
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| 84 | #ifdef SIGVTALRM
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| 85 | { "VTALRM", SIGVTALRM }, /* 26 (arm,i386,m68k,ppc,alpha,sparc*), 28 (mips) */
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| 86 | #endif
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| 87 | #ifdef SIGPROF
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| 88 | { "PROF", SIGPROF }, /* 27 (arm,i386,m68k,ppc,alpha,sparc*), 29 (mips) */
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| 89 | #endif
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| 90 | #ifdef SIGPWR
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| 91 | { "PWR", SIGPWR }, /* 30 (arm,i386,m68k,ppc), 29 (alpha,sparc*), 19 (mips) */
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| 92 | #endif
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| 93 | #ifdef SIGINFO
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| 94 | { "INFO", SIGINFO }, /* 29 (alpha) */
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| 95 | #endif
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| 96 | #ifdef SIGLOST
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| 97 | { "LOST", SIGLOST }, /* 29 (arm,i386,m68k,ppc,sparc*) */
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| 98 | #endif
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| 99 | #ifdef SIGWINCH
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| 100 | { "WINCH", SIGWINCH }, /* 28 (arm,i386,m68k,ppc,alpha,sparc*), 20 (mips) */
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| 101 | #endif
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| 102 | #ifdef SIGUNUSED
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| 103 | { "UNUSED", SIGUNUSED }, /* 31 (arm,i386,m68k,ppc) */
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| 104 | #endif
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| 105 | {0, 0}
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| 106 | };
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| 107 |
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| 108 | /*
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| 109 | if str_sig == NULL returned signal name [*signo],
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| 110 | if str_sig != NULL - set *signo from signal_name,
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| 111 | findings with digit number or with or without SIG-prefix name
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| 112 |
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| 113 | if startnum=0 flag for support finding zero signal,
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| 114 | but str_sig="0" always found, (hmm - standart or realize?)
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| 115 | if startnum<0 returned reverse signal_number <-> signal_name
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| 116 | if found error - returned NULL
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| 117 |
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| 118 | */
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| 119 |
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| 120 | const char *
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| 121 | u_signal_names(const char *str_sig, int *signo, int startnum)
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| 122 | {
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| 123 | static char retstr[16];
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| 124 | const struct signal_name *s = signames;
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| 125 | static const char prefix[] = "SIG";
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| 126 | const char *sptr;
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| 127 |
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| 128 | if(startnum)
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| 129 | s++;
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| 130 | if(str_sig==NULL) {
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| 131 | while (s->name != 0) {
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| 132 | if(s->number == *signo)
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| 133 | break;
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| 134 | s++;
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| 135 | }
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| 136 | } else {
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| 137 | if (isdigit(((unsigned char)*str_sig))) {
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| 138 | char *endp;
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| 139 | long int sn = strtol(str_sig, &endp, 10);
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| 140 | /* test correct and overflow */
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| 141 | if(*endp == 0 && sn >= 0 && sn < NSIG) {
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| 142 | *signo = (int)sn;
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| 143 | /* test for unnamed */
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| 144 | sptr = u_signal_names(0, signo, 0);
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| 145 | if(sptr==NULL)
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| 146 | return NULL;
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| 147 | if(sn!=0)
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| 148 | sptr += 3;
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| 149 | return sptr;
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| 150 | }
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| 151 | } else {
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| 152 | sptr = str_sig;
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| 153 | while (s->name != 0) {
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| 154 | if (strcasecmp(s->name, sptr) == 0) {
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| 155 | *signo = s->number;
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| 156 | if(startnum<0) {
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| 157 | sprintf(retstr, "%d", *signo);
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| 158 | return retstr;
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| 159 | }
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| 160 | break;
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| 161 | }
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| 162 | if(s!=signames && sptr == str_sig &&
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| 163 | strncasecmp(sptr, prefix, 3) == 0) {
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| 164 | sptr += 3; /* strlen(prefix) */
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| 165 | continue;
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| 166 | }
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| 167 | sptr = str_sig;
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| 168 | s++;
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| 169 | }
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| 170 | }
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| 171 | }
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| 172 | if(s->name==0)
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| 173 | return NULL;
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| 174 | if(s!=signames)
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| 175 | strcpy(retstr, prefix);
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| 176 | else
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| 177 | retstr[0] = 0;
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| 178 | return strcat(retstr, s->name);
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| 179 | }
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