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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | /* vi: set sw=4 ts=4: */ /* * Utility routines. * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * Copyright (C) 2006 Rob Landley * Copyright (C) 2006 Denys Vlasenko * * Licensed under GPLv2, see file LICENSE in this source tree. */ #include "libbb.h" /* All known arches use small ints for signals */ smallint bb_got_signal; void record_signo(int signo) { bb_got_signal = signo; } /* Saves 2 bytes on x86! Oh my... */ int FAST_FUNC sigaction_set(int signum, const struct sigaction *act) { return sigaction(signum, act, NULL); } int FAST_FUNC sigprocmask_allsigs(int how) { sigset_t set; sigfillset(&set); return sigprocmask(how, &set, NULL); } void FAST_FUNC bb_signals(int sigs, void (*f)(int)) { int sig_no = 0; int bit = 1; while (sigs) { if (sigs & bit) { sigs -= bit; signal(sig_no, f); } sig_no++; bit <<= 1; } } void FAST_FUNC bb_signals_recursive_norestart(int sigs, void (*f)(int)) { int sig_no = 0; int bit = 1; struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_handler = f; /*sa.sa_flags = 0;*/ /*sigemptyset(&sa.sa_mask); - hope memset did it*/ while (sigs) { if (sigs & bit) { sigs -= bit; sigaction_set(sig_no, &sa); } sig_no++; bit <<= 1; } } void FAST_FUNC sig_block(int sig) { sigset_t ss; sigemptyset(&ss); sigaddset(&ss, sig); sigprocmask(SIG_BLOCK, &ss, NULL); } void FAST_FUNC sig_unblock(int sig) { sigset_t ss; sigemptyset(&ss); sigaddset(&ss, sig); sigprocmask(SIG_UNBLOCK, &ss, NULL); } void FAST_FUNC wait_for_any_sig(void) { sigset_t ss; sigemptyset(&ss); sigsuspend(&ss); } /* Assuming the sig is fatal */ void FAST_FUNC kill_myself_with_sig(int sig) { signal(sig, SIG_DFL); sig_unblock(sig); raise(sig); _exit(sig | 128); /* Should not reach it */ } void FAST_FUNC signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); /*sigemptyset(&sa.sa_mask);*/ sa.sa_flags = SA_RESTART; sa.sa_handler = handler; sigaction_set(sig, &sa); } void FAST_FUNC signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); /*sigemptyset(&sa.sa_mask);*/ /*sa.sa_flags = 0;*/ sa.sa_handler = handler; sigaction_set(sig, &sa); } |