/* vi: set sw=4 ts=4: */ /* * Signal name/number conversion routines. * * Copyright 2006 Rob Landley <rob@landley.net> * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ //config:config FEATURE_RTMINMAX //config: bool "Support RTMIN[+n] and RTMAX[-n] signal names" //config: default y //config: help //config: Support RTMIN[+n] and RTMAX[-n] signal names //config: in kill, killall etc. This costs ~250 bytes. #include "libbb.h" /* Believe it or not, but some arches have more than 32 SIGs! * HPPA: SIGSTKFLT == 36. */ static const char signals[][7] ALIGN1 = { // SUSv3 says kill must support these, and specifies the numerical values, // http://www.opengroup.org/onlinepubs/009695399/utilities/kill.html // {0, "EXIT"}, {1, "HUP"}, {2, "INT"}, {3, "QUIT"}, // {6, "ABRT"}, {9, "KILL"}, {14, "ALRM"}, {15, "TERM"} // And Posix adds the following: // {SIGILL, "ILL"}, {SIGTRAP, "TRAP"}, {SIGFPE, "FPE"}, {SIGUSR1, "USR1"}, // {SIGSEGV, "SEGV"}, {SIGUSR2, "USR2"}, {SIGPIPE, "PIPE"}, {SIGCHLD, "CHLD"}, // {SIGCONT, "CONT"}, {SIGSTOP, "STOP"}, {SIGTSTP, "TSTP"}, {SIGTTIN, "TTIN"}, // {SIGTTOU, "TTOU"} [0] = "EXIT", #ifdef SIGHUP [SIGHUP ] = "HUP", #endif #ifdef SIGINT [SIGINT ] = "INT", #endif #ifdef SIGQUIT [SIGQUIT ] = "QUIT", #endif #ifdef SIGILL [SIGILL ] = "ILL", #endif #ifdef SIGTRAP [SIGTRAP ] = "TRAP", #endif #ifdef SIGABRT [SIGABRT ] = "ABRT", #endif #ifdef SIGBUS [SIGBUS ] = "BUS", #endif #ifdef SIGFPE [SIGFPE ] = "FPE", #endif #ifdef SIGKILL [SIGKILL ] = "KILL", #endif #ifdef SIGUSR1 [SIGUSR1 ] = "USR1", #endif #ifdef SIGSEGV [SIGSEGV ] = "SEGV", #endif #ifdef SIGUSR2 [SIGUSR2 ] = "USR2", #endif #ifdef SIGPIPE [SIGPIPE ] = "PIPE", #endif #ifdef SIGALRM [SIGALRM ] = "ALRM", #endif #ifdef SIGTERM [SIGTERM ] = "TERM", #endif #ifdef SIGSTKFLT [SIGSTKFLT] = "STKFLT", #endif #ifdef SIGCHLD [SIGCHLD ] = "CHLD", #endif #ifdef SIGCONT [SIGCONT ] = "CONT", #endif #ifdef SIGSTOP [SIGSTOP ] = "STOP", #endif #ifdef SIGTSTP [SIGTSTP ] = "TSTP", #endif #ifdef SIGTTIN [SIGTTIN ] = "TTIN", #endif #ifdef SIGTTOU [SIGTTOU ] = "TTOU", #endif #ifdef SIGURG [SIGURG ] = "URG", #endif #ifdef SIGXCPU [SIGXCPU ] = "XCPU", #endif #ifdef SIGXFSZ [SIGXFSZ ] = "XFSZ", #endif #ifdef SIGVTALRM [SIGVTALRM] = "VTALRM", #endif #ifdef SIGPROF [SIGPROF ] = "PROF", #endif #ifdef SIGWINCH [SIGWINCH ] = "WINCH", #endif #ifdef SIGPOLL [SIGPOLL ] = "POLL", #endif #ifdef SIGPWR [SIGPWR ] = "PWR", #endif #ifdef SIGSYS [SIGSYS ] = "SYS", #endif #if ENABLE_FEATURE_RTMINMAX # ifdef __SIGRTMIN [__SIGRTMIN] = "RTMIN", # endif // This makes array about x2 bigger. // More compact approach is to special-case SIGRTMAX in print_signames() //# ifdef __SIGRTMAX // [__SIGRTMAX] = "RTMAX", //# endif #endif }; // Convert signal name to number. int FAST_FUNC get_signum(const char *name) { unsigned i; i = bb_strtou(name, NULL, 10); if (!errno && i < NSIG) /* for shells, we allow 0 too */ return i; if (strncasecmp(name, "SIG", 3) == 0) name += 3; for (i = 0; i < ARRAY_SIZE(signals); i++) if (strcasecmp(name, signals[i]) == 0) return i; #if ENABLE_DESKTOP # if defined(SIGIOT) || defined(SIGIO) /* SIGIO[T] are aliased to other names, * thus cannot be stored in the signals[] array. * Need special code to recognize them */ if ((name[0] | 0x20) == 'i' && (name[1] | 0x20) == 'o') { # ifdef SIGIO if (!name[2]) return SIGIO; # endif # ifdef SIGIOT if ((name[2] | 0x20) == 't' && !name[3]) return SIGIOT; # endif } # endif #endif #if ENABLE_FEATURE_RTMINMAX # if defined(SIGRTMIN) && defined(SIGRTMAX) /* libc may use some rt sigs for pthreads and therefore "remap" SIGRTMIN/MAX, * but we want to use "raw" SIGRTMIN/MAX. Underscored names, if exist, provide * them. If they don't exist, fall back to non-underscored ones: */ # if !defined(__SIGRTMIN) # define __SIGRTMIN SIGRTMIN # endif # if !defined(__SIGRTMAX) # define __SIGRTMAX SIGRTMAX # endif if (strncasecmp(name, "RTMIN", 5) == 0) { if (!name[5]) return __SIGRTMIN; if (name[5] == '+') { i = bb_strtou(name + 6, NULL, 10); if (!errno && i <= __SIGRTMAX - __SIGRTMIN) return __SIGRTMIN + i; } } else if (strncasecmp(name, "RTMAX", 5) == 0) { if (!name[5]) return __SIGRTMAX; if (name[5] == '-') { i = bb_strtou(name + 6, NULL, 10); if (!errno && i <= __SIGRTMAX - __SIGRTMIN) return __SIGRTMAX - i; } } # endif #endif return -1; } // Convert signal number to name const char* FAST_FUNC get_signame(int number) { if ((unsigned)number < ARRAY_SIZE(signals)) { if (signals[number][0]) /* if it's not an empty str */ return signals[number]; } return itoa(number); } // Print the whole signal list void FAST_FUNC print_signames(void) { unsigned signo; for (signo = 1; signo < ARRAY_SIZE(signals); signo++) { const char *name = signals[signo]; if (name[0]) printf("%2u) %s\n", signo, name); } #if ENABLE_FEATURE_RTMINMAX # ifdef __SIGRTMAX printf("%2u) %s\n", __SIGRTMAX, "RTMAX"); # endif #endif }