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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