| /* 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 |
| } |