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Annotation of 43BSD/usr.lib/libF77/main.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1980 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)main.c      5.2     6/26/85
                      7:  */
                      8: #include <stdio.h>
                      9: #include <signal.h>
                     10: #include "../libI77/fiodefs.h"
                     11: 
                     12: int xargc;
                     13: char **xargv;
                     14: 
                     15: main(argc, argv, arge)
                     16: int argc;
                     17: char **argv;
                     18: char **arge;
                     19: {
                     20: int sigdie();
                     21: long int (*sigf)();
                     22: int signum;
                     23: 
                     24: xargc = argc;
                     25: xargv = argv;
                     26: 
                     27: for (signum=1; signum<=16; signum++)
                     28: {
                     29:        if((sigf=signal(signum, sigdie)) != SIG_DFL) signal(signum, sigf);
                     30: }
                     31: 
                     32: #ifdef pdp11
                     33:        ldfps(01200); /* detect overflow as an exception */
                     34: #endif
                     35: 
                     36: f_init();
                     37: MAIN_();
                     38: f_exit();
                     39: return 0;
                     40: }
                     41: 
                     42: struct action {
                     43:        char *mesg;
                     44:        int   core;
                     45: } sig_act[16] = {
                     46:        {"Hangup", 0},                  /* SIGHUP  */
                     47:        {"Interrupt!", 0},              /* SIGINT  */
                     48:        {"Quit!", 1},                   /* SIGQUIT */
                     49:        {"Illegal ", 1},                /* SIGILL  */
                     50:        {"Trace Trap", 1},              /* SIGTRAP */
                     51:        {"IOT Trap", 1},                /* SIGIOT  */
                     52:        {"EMT Trap", 1},                /* SIGEMT  */
                     53:        {"Arithmetic Exception", 1},    /* SIGFPE  */
                     54:        { 0, 0},                        /* SIGKILL */
                     55:        {"Bus error", 1},               /* SIGBUS  */
                     56:        {"Segmentation violation", 1},  /* SIGSEGV */
                     57:        {"Sys arg", 1},                 /* SIGSYS  */
                     58:        {"Open pipe", 0},               /* SIGPIPE */
                     59:        {"Alarm", 0},                   /* SIGALRM */
                     60:        {"Terminated", 0},              /* SIGTERM */
                     61:        {"Sig 16", 0},                  /* unassigned */
                     62: };
                     63: 
                     64: struct action act_fpe[] = {
                     65:        {"Integer overflow", 1},
                     66:        {"Integer divide by 0", 1},
                     67:        {"Floating point overflow trap", 1},
                     68:        {"Floating divide by zero trap", 1},
                     69:        {"Floating point underflow trap", 1},
                     70:        {"Decimal overflow", 1},
                     71:        {"Subscript range", 1},
                     72:        {"Floating point overflow", 0},
                     73:        {"Floating divide by zero", 0},
                     74:        {"Floating point underflow", 0},
                     75: };
                     76: 
                     77: struct action act_ill[] = {
                     78:        {"addr mode", 1},
                     79:        {"instruction", 1},
                     80:        {"operand", 0},
                     81: };
                     82: 
                     83: #if    vax
                     84: sigdie(s, t, sc)
                     85: int s; int t; struct sigcontext *sc;
                     86: 
                     87: #else  pdp11
                     88: sigdie(s, t, pc)
                     89: int s; int t; long pc;
                     90: 
                     91: #endif
                     92: {
                     93: extern unit units[];
                     94: register struct action *act = &sig_act[s-1];
                     95: /* print error message, then flush buffers */
                     96: 
                     97: if (s == SIGHUP || s == SIGINT || s == SIGQUIT)
                     98:        signal(s, SIG_IGN);     /* don't allow it again */
                     99: else
                    100:        signal(s, SIG_DFL);     /* shouldn't happen again, but ... */
                    101: 
                    102: if (act->mesg)
                    103:        {
                    104:        fprintf(units[STDERR].ufd, "*** %s", act->mesg);
                    105:        if (s == SIGFPE)
                    106:                {
                    107:                if (t >= 1 && t <= 10)
                    108:                        fprintf(units[STDERR].ufd, ": %s", act_fpe[t-1].mesg);
                    109:                else
                    110:                        fprintf(units[STDERR].ufd, ": Type=%d?", t);
                    111:                }
                    112:        else if (s == SIGILL)
                    113:                {
                    114:                if (t == 4) t = 2;      /* 4.0bsd botch */
                    115:                if (t >= 0 && t <= 2)
                    116:                        fprintf(units[STDERR].ufd, "%s", act_ill[t].mesg);
                    117:                else
                    118:                        fprintf(units[STDERR].ufd, "compat mode: Code=%d", t);
                    119:                }
                    120:        putc('\n', units[STDERR].ufd);
                    121:        }
                    122: f77_abort( s, act->core );
                    123: }

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