Annotation of src/usr.bin/tip/tipout.c, Revision 1.20
1.20 ! nicm 1: /* $OpenBSD: tipout.c,v 1.19 2009/10/27 23:59:45 deraadt Exp $ */
1.4 millert 2: /* $NetBSD: tipout.c,v 1.5 1996/12/29 10:34:12 cgd Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.10 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include "tip.h"
1.13 deraadt 34:
1.1 deraadt 35: /*
36: * tip
37: *
38: * lower fork of tip -- handles passive side
39: * reading from the remote host
40: */
41:
42: static jmp_buf sigbuf;
43:
1.14 moritz 44: static void intIOT(int);
45: static void intEMT(int);
46: static void intTERM(int);
47: static void intSYS(int);
48:
1.1 deraadt 49: /*
50: * TIPOUT wait state routine --
51: * sent by TIPIN when it wants to posses the remote host
52: */
1.15 deraadt 53: /*ARGSUSED*/
1.14 moritz 54: static void
1.13 deraadt 55: intIOT(int signo)
1.1 deraadt 56: {
1.20 ! nicm 57: write(tipin_fd, &ccc, 1);
! 58: read(tipin_fd, &ccc, 1);
1.1 deraadt 59: longjmp(sigbuf, 1);
60: }
61:
62: /*
63: * Scripting command interpreter --
64: * accepts script file name over the pipe and acts accordingly
65: */
1.15 deraadt 66: /*ARGSUSED*/
1.14 moritz 67: static void
1.13 deraadt 68: intEMT(int signo)
1.1 deraadt 69: {
70: char c, line[256];
1.8 millert 71: char *pline = line;
1.1 deraadt 72: char reply;
73:
1.20 ! nicm 74: read(tipin_fd, &c, 1);
1.5 millert 75: while (c != '\n' && pline - line < sizeof(line)) {
1.1 deraadt 76: *pline++ = c;
1.20 ! nicm 77: read(tipin_fd, &c, 1);
1.1 deraadt 78: }
79: *pline = '\0';
80: if (boolean(value(SCRIPT)) && fscript != NULL)
81: fclose(fscript);
82: if (pline == line) {
1.4 millert 83: setboolean(value(SCRIPT), FALSE);
1.1 deraadt 84: reply = 'y';
85: } else {
86: if ((fscript = fopen(line, "a")) == NULL)
87: reply = 'n';
88: else {
89: reply = 'y';
1.4 millert 90: setboolean(value(SCRIPT), TRUE);
1.1 deraadt 91: }
92: }
1.20 ! nicm 93: write(tipin_fd, &reply, 1);
1.1 deraadt 94: longjmp(sigbuf, 1);
95: }
96:
1.14 moritz 97: static void
1.11 deraadt 98: intTERM(int signo)
1.1 deraadt 99: {
100: if (boolean(value(SCRIPT)) && fscript != NULL)
101: fclose(fscript);
1.11 deraadt 102: if (signo && tipin_pid)
103: kill(tipin_pid, signo);
1.1 deraadt 104: exit(0);
105: }
106:
1.15 deraadt 107: /*ARGSUSED*/
1.14 moritz 108: static void
1.13 deraadt 109: intSYS(int signo)
1.1 deraadt 110: {
1.4 millert 111: setboolean(value(BEAUTIFY), !boolean(value(BEAUTIFY)));
1.1 deraadt 112: longjmp(sigbuf, 1);
113: }
114:
115: /*
116: * ****TIPOUT TIPOUT****
117: */
1.6 deraadt 118: void
1.13 deraadt 119: tipout(void)
1.1 deraadt 120: {
121: char buf[BUFSIZ];
1.8 millert 122: char *cp;
1.17 deraadt 123: ssize_t scnt;
1.16 deraadt 124: size_t cnt;
1.7 millert 125: sigset_t mask, omask;
1.1 deraadt 126:
127: signal(SIGINT, SIG_IGN);
128: signal(SIGQUIT, SIG_IGN);
129: signal(SIGEMT, intEMT); /* attention from TIPIN */
130: signal(SIGTERM, intTERM); /* time to go signal */
131: signal(SIGIOT, intIOT); /* scripting going on signal */
132: signal(SIGHUP, intTERM); /* for dial-ups */
133: signal(SIGSYS, intSYS); /* beautify toggle */
134: (void) setjmp(sigbuf);
1.7 millert 135: sigprocmask(SIG_BLOCK, NULL, &omask);
136: for (;;) {
137: sigprocmask(SIG_SETMASK, &omask, NULL);
1.17 deraadt 138: scnt = read(FD, buf, BUFSIZ);
139: if (scnt <= 0) {
1.1 deraadt 140: /* lost carrier */
1.18 jason 141: if (scnt == 0 || (scnt < 0 && errno == EIO)) {
1.7 millert 142: sigemptyset(&mask);
143: sigaddset(&mask, SIGTERM);
144: sigprocmask(SIG_BLOCK, &mask, NULL);
1.11 deraadt 145: intTERM(0);
1.1 deraadt 146: /*NOTREACHED*/
147: }
148: continue;
149: }
1.17 deraadt 150: cnt = scnt;
1.7 millert 151: sigemptyset(&mask);
152: sigaddset(&mask, SIGEMT);
153: sigaddset(&mask, SIGTERM);
154: sigaddset(&mask, SIGIOT);
155: sigaddset(&mask, SIGSYS);
156: sigprocmask(SIG_BLOCK, &mask, NULL);
1.1 deraadt 157: for (cp = buf; cp < buf + cnt; cp++)
1.2 deraadt 158: *cp &= STRIP_PAR;
1.12 deraadt 159: write(STDOUT_FILENO, buf, cnt);
1.1 deraadt 160: if (boolean(value(SCRIPT)) && fscript != NULL) {
161: if (!boolean(value(BEAUTIFY))) {
162: fwrite(buf, 1, cnt, fscript);
163: continue;
164: }
165: for (cp = buf; cp < buf + cnt; cp++)
166: if ((*cp >= ' ' && *cp <= '~') ||
167: any(*cp, value(EXCEPTIONS)))
168: putc(*cp, fscript);
169: }
170: }
171: }
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