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Annotation of 43BSDReno/usr.bin/tip/tipout.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)tipout.c   5.3 (Berkeley) 6/1/90";
                     22: #endif /* not lint */
                     23: 
                     24: #include "tip.h"
                     25: /*
                     26:  * tip
                     27:  *
                     28:  * lower fork of tip -- handles passive side
                     29:  *  reading from the remote host
                     30:  */
                     31: 
                     32: static jmp_buf sigbuf;
                     33: 
                     34: /*
                     35:  * TIPOUT wait state routine --
                     36:  *   sent by TIPIN when it wants to posses the remote host
                     37:  */
                     38: intIOT()
                     39: {
                     40: 
                     41:        write(repdes[1],&ccc,1);
                     42:        read(fildes[0], &ccc,1);
                     43:        longjmp(sigbuf, 1);
                     44: }
                     45: 
                     46: /*
                     47:  * Scripting command interpreter --
                     48:  *  accepts script file name over the pipe and acts accordingly
                     49:  */
                     50: intEMT()
                     51: {
                     52:        char c, line[256];
                     53:        register char *pline = line;
                     54:        char reply;
                     55: 
                     56:        read(fildes[0], &c, 1);
                     57:        while (c != '\n') {
                     58:                *pline++ = c;
                     59:                read(fildes[0], &c, 1);
                     60:        }
                     61:        *pline = '\0';
                     62:        if (boolean(value(SCRIPT)) && fscript != NULL)
                     63:                fclose(fscript);
                     64:        if (pline == line) {
                     65:                boolean(value(SCRIPT)) = FALSE;
                     66:                reply = 'y';
                     67:        } else {
                     68:                if ((fscript = fopen(line, "a")) == NULL)
                     69:                        reply = 'n';
                     70:                else {
                     71:                        reply = 'y';
                     72:                        boolean(value(SCRIPT)) = TRUE;
                     73:                }
                     74:        }
                     75:        write(repdes[1], &reply, 1);
                     76:        longjmp(sigbuf, 1);
                     77: }
                     78: 
                     79: intTERM()
                     80: {
                     81: 
                     82:        if (boolean(value(SCRIPT)) && fscript != NULL)
                     83:                fclose(fscript);
                     84:        exit(0);
                     85: }
                     86: 
                     87: intSYS()
                     88: {
                     89: 
                     90:        boolean(value(BEAUTIFY)) = !boolean(value(BEAUTIFY));
                     91:        longjmp(sigbuf, 1);
                     92: }
                     93: 
                     94: /*
                     95:  * ****TIPOUT   TIPOUT****
                     96:  */
                     97: tipout()
                     98: {
                     99:        char buf[BUFSIZ];
                    100:        register char *cp;
                    101:        register int cnt;
                    102:        extern int errno;
                    103:        int omask;
                    104: 
                    105:        signal(SIGINT, SIG_IGN);
                    106:        signal(SIGQUIT, SIG_IGN);
                    107:        signal(SIGEMT, intEMT);         /* attention from TIPIN */
                    108:        signal(SIGTERM, intTERM);       /* time to go signal */
                    109:        signal(SIGIOT, intIOT);         /* scripting going on signal */
                    110:        signal(SIGHUP, intTERM);        /* for dial-ups */
                    111:        signal(SIGSYS, intSYS);         /* beautify toggle */
                    112:        (void) setjmp(sigbuf);
                    113:        for (omask = 0;; sigsetmask(omask)) {
                    114:                cnt = read(FD, buf, BUFSIZ);
                    115:                if (cnt <= 0) {
                    116:                        /* lost carrier */
                    117:                        if (cnt < 0 && errno == EIO) {
                    118:                                sigblock(sigmask(SIGTERM));
                    119:                                intTERM();
                    120:                                /*NOTREACHED*/
                    121:                        }
                    122:                        continue;
                    123:                }
                    124: #define        ALLSIGS sigmask(SIGEMT)|sigmask(SIGTERM)|sigmask(SIGIOT)|sigmask(SIGSYS)
                    125:                omask = sigblock(ALLSIGS);
                    126:                for (cp = buf; cp < buf + cnt; cp++)
                    127:                        *cp &= 0177;
                    128:                write(1, buf, cnt);
                    129:                if (boolean(value(SCRIPT)) && fscript != NULL) {
                    130:                        if (!boolean(value(BEAUTIFY))) {
                    131:                                fwrite(buf, 1, cnt, fscript);
                    132:                                continue;
                    133:                        }
                    134:                        for (cp = buf; cp < buf + cnt; cp++)
                    135:                                if ((*cp >= ' ' && *cp <= '~') ||
                    136:                                    any(*cp, value(EXCEPTIONS)))
                    137:                                        putc(*cp, fscript);
                    138:                }
                    139:        }
                    140: }

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