1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1982-2009 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * David Korn <dgk@research.att.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 #ifndef SH_SIGBITS 22 /* 23 * UNIX shell 24 * S. R. Bourne 25 * Rewritten by David Korn 26 * 27 */ 28 29 #include <sig.h> 30 #include <setjmp.h> 31 #include <error.h> 32 #include <sfio.h> 33 #include "FEATURE/setjmp" 34 #include "FEATURE/sigfeatures" 35 36 37 #ifndef SIGWINCH 38 # ifdef SIGWIND 39 # define SIGWINCH SIGWIND 40 # else 41 # ifdef SIGWINDOW 42 # define SIGWINCH SIGWINDOW 43 # endif 44 # endif 45 #endif 46 47 typedef void (*SH_SIGTYPE)(int,void(*)(int)); 48 49 #define SH_FORKLIM 16 /* fork timeout interval */ 50 51 #define SH_TRAP 0200 /* bit for internal traps */ 52 #define SH_ERRTRAP 0 /* trap for non-zero exit status */ 53 #define SH_KEYTRAP 1 /* trap for keyboard event */ 54 #define SH_DEBUGTRAP 4 /* must be last internal trap */ 55 56 #define SH_SIGBITS 8 57 #define SH_SIGFAULT 1 /* signal handler is sh_fault */ 58 #define SH_SIGOFF 2 /* signal handler is SIG_IGN */ 59 #define SH_SIGSET 4 /* pending signal */ 60 #define SH_SIGTRAP 010 /* pending trap */ 61 #define SH_SIGDONE 020 /* default is exit */ 62 #define SH_SIGIGNORE 040 /* default is ingore signal */ 63 #define SH_SIGINTERACTIVE 0100 /* handle interactive specially */ 64 #define SH_SIGTSTP 0200 /* tstp signal received */ 65 #define SH_SIGALRM 0200 /* timer alarm received */ 66 #define SH_SIGTERM SH_SIGOFF /* term signal received */ 67 #define SH_SIGRUNTIME 0400 /* runtime value */ 68 69 #define SH_SIGRTMIN 0 /* sh.sigruntime[] index */ 70 #define SH_SIGRTMAX 1 /* sh.sigruntime[] index */ 71 72 /* 73 * These are longjmp values 74 */ 75 76 #define SH_JMPDOT 2 77 #define SH_JMPEVAL 3 78 #define SH_JMPTRAP 4 79 #define SH_JMPIO 5 80 #define SH_JMPCMD 6 81 #define SH_JMPFUN 7 82 #define SH_JMPERRFN 8 83 #define SH_JMPSUB 9 84 #define SH_JMPERREXIT 10 85 #define SH_JMPEXIT 11 86 #define SH_JMPSCRIPT 12 87 88 struct openlist 89 { 90 Sfio_t *strm; 91 struct openlist *next; 92 }; 93 94 struct checkpt 95 { 96 sigjmp_buf buff; 97 sigjmp_buf *prev; 98 int topfd; 99 int mode; 100 struct openlist *olist; 101 #if (ERROR_VERSION >= 20030214L) 102 Error_context_t err; 103 #else 104 struct errorcontext err; 105 #endif 106 }; 107 108 #define sh_pushcontext(bp,n) ( (bp)->mode=(n) , (bp)->olist=0, \ 109 (bp)->topfd=sh.topfd, (bp)->prev=sh.jmplist, \ 110 (bp)->err = *ERROR_CONTEXT_BASE, \ 111 sh.jmplist = (sigjmp_buf*)(&(bp)->buff) \ 112 ) 113 #define sh_popcontext(bp) (sh.jmplist=(bp)->prev, errorpop(&((bp)->err))) 114 115 extern void sh_fault(int); 116 extern void sh_done(void*,int); 117 extern void sh_chktrap(void); 118 extern void sh_sigclear(int); 119 extern void sh_sigdone(void); 120 extern void sh_siginit(void*); 121 extern void sh_sigtrap(int); 122 extern void sh_sigreset(int); 123 extern void sh_timetraps(void); 124 extern void *sh_timeradd(unsigned long,int ,void (*)(void*),void*); 125 extern void timerdel(void*); 126 127 extern const char e_alarm[]; 128 129 #endif /* !SH_SIGBITS */ 130