1 /* vi: set sw=4 ts=4: */
3 * Signal name/number conversion routines.
5 * Copyright 2006 Rob Landley <rob@landley.net>
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 //config:config FEATURE_RTMINMAX
10 //config: bool "Support RTMIN[+n] and RTMAX[-n] signal names"
13 //config: Support RTMIN[+n] and RTMAX[-n] signal names
14 //config: in kill, killall etc. This costs ~250 bytes.
18 /* Believe it or not, but some arches have more than 32 SIGs!
19 * HPPA: SIGSTKFLT == 36. */
21 static const char signals[][7] ALIGN1 = {
22 // SUSv3 says kill must support these, and specifies the numerical values,
23 // http://www.opengroup.org/onlinepubs/009695399/utilities/kill.html
24 // {0, "EXIT"}, {1, "HUP"}, {2, "INT"}, {3, "QUIT"},
25 // {6, "ABRT"}, {9, "KILL"}, {14, "ALRM"}, {15, "TERM"}
26 // And Posix adds the following:
27 // {SIGILL, "ILL"}, {SIGTRAP, "TRAP"}, {SIGFPE, "FPE"}, {SIGUSR1, "USR1"},
28 // {SIGSEGV, "SEGV"}, {SIGUSR2, "USR2"}, {SIGPIPE, "PIPE"}, {SIGCHLD, "CHLD"},
29 // {SIGCONT, "CONT"}, {SIGSTOP, "STOP"}, {SIGTSTP, "TSTP"}, {SIGTTIN, "TTIN"},
79 [SIGSTKFLT] = "STKFLT",
109 [SIGVTALRM] = "VTALRM",
115 [SIGWINCH ] = "WINCH",
126 #if ENABLE_FEATURE_RTMINMAX
128 [__SIGRTMIN] = "RTMIN",
130 // This makes array about x2 bigger.
131 // More compact approach is to special-case SIGRTMAX in print_signames()
133 // [__SIGRTMAX] = "RTMAX",
138 // Convert signal name to number.
140 int FAST_FUNC get_signum(const char *name)
144 i = bb_strtou(name, NULL, 10);
145 if (!errno && i < NSIG) /* for shells, we allow 0 too */
147 if (strncasecmp(name, "SIG", 3) == 0)
149 for (i = 0; i < ARRAY_SIZE(signals); i++)
150 if (strcasecmp(name, signals[i]) == 0)
154 # if defined(SIGIOT) || defined(SIGIO)
155 /* SIGIO[T] are aliased to other names,
156 * thus cannot be stored in the signals[] array.
157 * Need special code to recognize them */
158 if ((name[0] | 0x20) == 'i' && (name[1] | 0x20) == 'o') {
164 if ((name[2] | 0x20) == 't' && !name[3])
171 #if ENABLE_FEATURE_RTMINMAX
172 # if defined(SIGRTMIN) && defined(SIGRTMAX)
173 /* libc may use some rt sigs for pthreads and therefore "remap" SIGRTMIN/MAX,
174 * but we want to use "raw" SIGRTMIN/MAX. Underscored names, if exist, provide
175 * them. If they don't exist, fall back to non-underscored ones: */
176 # if !defined(__SIGRTMIN)
177 # define __SIGRTMIN SIGRTMIN
179 # if !defined(__SIGRTMAX)
180 # define __SIGRTMAX SIGRTMAX
182 if (strncasecmp(name, "RTMIN", 5) == 0) {
185 if (name[5] == '+') {
186 i = bb_strtou(name + 6, NULL, 10);
187 if (!errno && i <= __SIGRTMAX - __SIGRTMIN)
188 return __SIGRTMIN + i;
191 else if (strncasecmp(name, "RTMAX", 5) == 0) {
194 if (name[5] == '-') {
195 i = bb_strtou(name + 6, NULL, 10);
196 if (!errno && i <= __SIGRTMAX - __SIGRTMIN)
197 return __SIGRTMAX - i;
206 // Convert signal number to name
208 const char* FAST_FUNC get_signame(int number)
210 if ((unsigned)number < ARRAY_SIZE(signals)) {
211 if (signals[number][0]) /* if it's not an empty str */
212 return signals[number];
219 // Print the whole signal list
221 void FAST_FUNC print_signames(void)
225 for (signo = 1; signo < ARRAY_SIZE(signals); signo++) {
226 const char *name = signals[signo];
228 printf("%2u) %s\n", signo, name);
230 #if ENABLE_FEATURE_RTMINMAX
232 printf("%2u) %s\n", __SIGRTMAX, "RTMAX");