| 1 | /* sig2str.c -- convert between signal names and numbers |
| 2 | |
| 3 | Copyright (C) 2002, 2004, 2006, 2009-2014 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software: you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | /* Written by Paul Eggert. */ |
| 19 | |
| 20 | #include <config.h> |
| 21 | |
| 22 | #include <limits.h> |
| 23 | #include <signal.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | |
| 28 | #include "sig2str.h" |
| 29 | |
| 30 | #ifndef SIGRTMIN |
| 31 | # define SIGRTMIN 0 |
| 32 | # undef SIGRTMAX |
| 33 | #endif |
| 34 | #ifndef SIGRTMAX |
| 35 | # define SIGRTMAX (SIGRTMIN - 1) |
| 36 | #endif |
| 37 | |
| 38 | #define NUMNAME(name) { SIG##name, #name } |
| 39 | |
| 40 | /* Signal names and numbers. Put the preferred name first. */ |
| 41 | static struct numname { int num; char const name[8]; } numname_table[] = |
| 42 | { |
| 43 | /* Signals required by POSIX 1003.1-2001 base, listed in |
| 44 | traditional numeric order where possible. */ |
| 45 | #ifdef SIGHUP |
| 46 | NUMNAME (HUP), |
| 47 | #endif |
| 48 | #ifdef SIGINT |
| 49 | NUMNAME (INT), |
| 50 | #endif |
| 51 | #ifdef SIGQUIT |
| 52 | NUMNAME (QUIT), |
| 53 | #endif |
| 54 | #ifdef SIGILL |
| 55 | NUMNAME (ILL), |
| 56 | #endif |
| 57 | #ifdef SIGTRAP |
| 58 | NUMNAME (TRAP), |
| 59 | #endif |
| 60 | #ifdef SIGABRT |
| 61 | NUMNAME (ABRT), |
| 62 | #endif |
| 63 | #ifdef SIGFPE |
| 64 | NUMNAME (FPE), |
| 65 | #endif |
| 66 | #ifdef SIGKILL |
| 67 | NUMNAME (KILL), |
| 68 | #endif |
| 69 | #ifdef SIGSEGV |
| 70 | NUMNAME (SEGV), |
| 71 | #endif |
| 72 | /* On Haiku, SIGSEGV == SIGBUS, but we prefer SIGSEGV to match |
| 73 | strsignal.c output, so SIGBUS must be listed second. */ |
| 74 | #ifdef SIGBUS |
| 75 | NUMNAME (BUS), |
| 76 | #endif |
| 77 | #ifdef SIGPIPE |
| 78 | NUMNAME (PIPE), |
| 79 | #endif |
| 80 | #ifdef SIGALRM |
| 81 | NUMNAME (ALRM), |
| 82 | #endif |
| 83 | #ifdef SIGTERM |
| 84 | NUMNAME (TERM), |
| 85 | #endif |
| 86 | #ifdef SIGUSR1 |
| 87 | NUMNAME (USR1), |
| 88 | #endif |
| 89 | #ifdef SIGUSR2 |
| 90 | NUMNAME (USR2), |
| 91 | #endif |
| 92 | #ifdef SIGCHLD |
| 93 | NUMNAME (CHLD), |
| 94 | #endif |
| 95 | #ifdef SIGURG |
| 96 | NUMNAME (URG), |
| 97 | #endif |
| 98 | #ifdef SIGSTOP |
| 99 | NUMNAME (STOP), |
| 100 | #endif |
| 101 | #ifdef SIGTSTP |
| 102 | NUMNAME (TSTP), |
| 103 | #endif |
| 104 | #ifdef SIGCONT |
| 105 | NUMNAME (CONT), |
| 106 | #endif |
| 107 | #ifdef SIGTTIN |
| 108 | NUMNAME (TTIN), |
| 109 | #endif |
| 110 | #ifdef SIGTTOU |
| 111 | NUMNAME (TTOU), |
| 112 | #endif |
| 113 | |
| 114 | /* Signals required by POSIX 1003.1-2001 with the XSI extension. */ |
| 115 | #ifdef SIGSYS |
| 116 | NUMNAME (SYS), |
| 117 | #endif |
| 118 | #ifdef SIGPOLL |
| 119 | NUMNAME (POLL), |
| 120 | #endif |
| 121 | #ifdef SIGVTALRM |
| 122 | NUMNAME (VTALRM), |
| 123 | #endif |
| 124 | #ifdef SIGPROF |
| 125 | NUMNAME (PROF), |
| 126 | #endif |
| 127 | #ifdef SIGXCPU |
| 128 | NUMNAME (XCPU), |
| 129 | #endif |
| 130 | #ifdef SIGXFSZ |
| 131 | NUMNAME (XFSZ), |
| 132 | #endif |
| 133 | |
| 134 | /* Unix Version 7. */ |
| 135 | #ifdef SIGIOT |
| 136 | NUMNAME (IOT), /* Older name for ABRT. */ |
| 137 | #endif |
| 138 | #ifdef SIGEMT |
| 139 | NUMNAME (EMT), |
| 140 | #endif |
| 141 | |
| 142 | /* USG Unix. */ |
| 143 | #ifdef SIGPHONE |
| 144 | NUMNAME (PHONE), |
| 145 | #endif |
| 146 | #ifdef SIGWIND |
| 147 | NUMNAME (WIND), |
| 148 | #endif |
| 149 | |
| 150 | /* Unix System V. */ |
| 151 | #ifdef SIGCLD |
| 152 | NUMNAME (CLD), |
| 153 | #endif |
| 154 | #ifdef SIGPWR |
| 155 | NUMNAME (PWR), |
| 156 | #endif |
| 157 | |
| 158 | /* GNU/Linux 2.2 and Solaris 8. */ |
| 159 | #ifdef SIGCANCEL |
| 160 | NUMNAME (CANCEL), |
| 161 | #endif |
| 162 | #ifdef SIGLWP |
| 163 | NUMNAME (LWP), |
| 164 | #endif |
| 165 | #ifdef SIGWAITING |
| 166 | NUMNAME (WAITING), |
| 167 | #endif |
| 168 | #ifdef SIGFREEZE |
| 169 | NUMNAME (FREEZE), |
| 170 | #endif |
| 171 | #ifdef SIGTHAW |
| 172 | NUMNAME (THAW), |
| 173 | #endif |
| 174 | #ifdef SIGLOST |
| 175 | NUMNAME (LOST), |
| 176 | #endif |
| 177 | #ifdef SIGWINCH |
| 178 | NUMNAME (WINCH), |
| 179 | #endif |
| 180 | |
| 181 | /* GNU/Linux 2.2. */ |
| 182 | #ifdef SIGINFO |
| 183 | NUMNAME (INFO), |
| 184 | #endif |
| 185 | #ifdef SIGIO |
| 186 | NUMNAME (IO), |
| 187 | #endif |
| 188 | #ifdef SIGSTKFLT |
| 189 | NUMNAME (STKFLT), |
| 190 | #endif |
| 191 | |
| 192 | /* AIX 5L. */ |
| 193 | #ifdef SIGDANGER |
| 194 | NUMNAME (DANGER), |
| 195 | #endif |
| 196 | #ifdef SIGGRANT |
| 197 | NUMNAME (GRANT), |
| 198 | #endif |
| 199 | #ifdef SIGMIGRATE |
| 200 | NUMNAME (MIGRATE), |
| 201 | #endif |
| 202 | #ifdef SIGMSG |
| 203 | NUMNAME (MSG), |
| 204 | #endif |
| 205 | #ifdef SIGPRE |
| 206 | NUMNAME (PRE), |
| 207 | #endif |
| 208 | #ifdef SIGRETRACT |
| 209 | NUMNAME (RETRACT), |
| 210 | #endif |
| 211 | #ifdef SIGSAK |
| 212 | NUMNAME (SAK), |
| 213 | #endif |
| 214 | #ifdef SIGSOUND |
| 215 | NUMNAME (SOUND), |
| 216 | #endif |
| 217 | |
| 218 | /* Older AIX versions. */ |
| 219 | #ifdef SIGALRM1 |
| 220 | NUMNAME (ALRM1), /* unknown; taken from Bash 2.05 */ |
| 221 | #endif |
| 222 | #ifdef SIGKAP |
| 223 | NUMNAME (KAP), /* Older name for SIGGRANT. */ |
| 224 | #endif |
| 225 | #ifdef SIGVIRT |
| 226 | NUMNAME (VIRT), /* unknown; taken from Bash 2.05 */ |
| 227 | #endif |
| 228 | #ifdef SIGWINDOW |
| 229 | NUMNAME (WINDOW), /* Older name for SIGWINCH. */ |
| 230 | #endif |
| 231 | |
| 232 | /* BeOS */ |
| 233 | #ifdef SIGKILLTHR |
| 234 | NUMNAME (KILLTHR), |
| 235 | #endif |
| 236 | |
| 237 | /* Older HP-UX versions. */ |
| 238 | #ifdef SIGDIL |
| 239 | NUMNAME (DIL), |
| 240 | #endif |
| 241 | |
| 242 | /* Korn shell and Bash, of uncertain vintage. */ |
| 243 | { 0, "EXIT" } |
| 244 | }; |
| 245 | |
| 246 | #define NUMNAME_ENTRIES (sizeof numname_table / sizeof numname_table[0]) |
| 247 | |
| 248 | /* ISDIGIT differs from isdigit, as follows: |
| 249 | - Its arg may be any int or unsigned int; it need not be an unsigned char |
| 250 | or EOF. |
| 251 | - It's typically faster. |
| 252 | POSIX says that only '0' through '9' are digits. Prefer ISDIGIT to |
| 253 | isdigit unless it's important to use the locale's definition |
| 254 | of "digit" even when the host does not conform to POSIX. */ |
| 255 | #define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9) |
| 256 | |
| 257 | /* Convert the signal name SIGNAME to a signal number. Return the |
| 258 | signal number if successful, -1 otherwise. */ |
| 259 | |
| 260 | static int |
| 261 | str2signum (char const *signame) |
| 262 | { |
| 263 | if (ISDIGIT (*signame)) |
| 264 | { |
| 265 | char *endp; |
| 266 | long int n = strtol (signame, &endp, 10); |
| 267 | if (! *endp && n <= SIGNUM_BOUND) |
| 268 | return n; |
| 269 | } |
| 270 | else |
| 271 | { |
| 272 | unsigned int i; |
| 273 | for (i = 0; i < NUMNAME_ENTRIES; i++) |
| 274 | if (strcmp (numname_table[i].name, signame) == 0) |
| 275 | return numname_table[i].num; |
| 276 | |
| 277 | { |
| 278 | char *endp; |
| 279 | int rtmin = SIGRTMIN; |
| 280 | int rtmax = SIGRTMAX; |
| 281 | |
| 282 | if (0 < rtmin && strncmp (signame, "RTMIN", 5) == 0) |
| 283 | { |
| 284 | long int n = strtol (signame + 5, &endp, 10); |
| 285 | if (! *endp && 0 <= n && n <= rtmax - rtmin) |
| 286 | return rtmin + n; |
| 287 | } |
| 288 | else if (0 < rtmax && strncmp (signame, "RTMAX", 5) == 0) |
| 289 | { |
| 290 | long int n = strtol (signame + 5, &endp, 10); |
| 291 | if (! *endp && rtmin - rtmax <= n && n <= 0) |
| 292 | return rtmax + n; |
| 293 | } |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | return -1; |
| 298 | } |
| 299 | |
| 300 | /* Convert the signal name SIGNAME to the signal number *SIGNUM. |
| 301 | Return 0 if successful, -1 otherwise. */ |
| 302 | |
| 303 | int |
| 304 | str2sig (char const *signame, int *signum) |
| 305 | { |
| 306 | *signum = str2signum (signame); |
| 307 | return *signum < 0 ? -1 : 0; |
| 308 | } |
| 309 | |
| 310 | /* Convert SIGNUM to a signal name in SIGNAME. SIGNAME must point to |
| 311 | a buffer of at least SIG2STR_MAX bytes. Return 0 if successful, -1 |
| 312 | otherwise. */ |
| 313 | |
| 314 | int |
| 315 | sig2str (int signum, char *signame) |
| 316 | { |
| 317 | unsigned int i; |
| 318 | for (i = 0; i < NUMNAME_ENTRIES; i++) |
| 319 | if (numname_table[i].num == signum) |
| 320 | { |
| 321 | strcpy (signame, numname_table[i].name); |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | { |
| 326 | int rtmin = SIGRTMIN; |
| 327 | int rtmax = SIGRTMAX; |
| 328 | int base, delta; |
| 329 | |
| 330 | if (! (rtmin <= signum && signum <= rtmax)) |
| 331 | return -1; |
| 332 | |
| 333 | if (signum <= rtmin + (rtmax - rtmin) / 2) |
| 334 | { |
| 335 | strcpy (signame, "RTMIN"); |
| 336 | base = rtmin; |
| 337 | } |
| 338 | else |
| 339 | { |
| 340 | strcpy (signame, "RTMAX"); |
| 341 | base = rtmax; |
| 342 | } |
| 343 | |
| 344 | delta = signum - base; |
| 345 | if (delta != 0) |
| 346 | sprintf (signame + 5, "%+d", delta); |
| 347 | return 0; |
| 348 | } |
| 349 | } |