Annotation of src/usr.bin/tip/tip.c, Revision 1.51
1.51 ! nicm 1: /* $OpenBSD: tip.c,v 1.50 2010/07/02 05:52:48 nicm Exp $ */
1.5 millert 2: /* $NetBSD: tip.c,v 1.13 1997/04/20 00:03:05 mellon 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.
1.20 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: /*
34: * tip - UNIX link to other systems
35: * tip [-v] [-speed] system-name
36: * or
1.40 nicm 37: * cu phone-number [-s speed] [-l line]
1.1 deraadt 38: */
1.36 nicm 39:
40: #include <sys/types.h>
41: #include <sys/socket.h>
42:
1.49 nicm 43: #include <util.h>
44:
1.1 deraadt 45: #include "tip.h"
46:
1.26 moritz 47: static void intprompt(int);
48: static void tipin(void);
49: static int escape(void);
50:
1.8 deraadt 51: int
1.25 deraadt 52: main(int argc, char *argv[])
1.1 deraadt 53: {
1.47 chl 54: char *sys = NULL;
1.36 nicm 55: int i, pair[2];
1.32 mcbride 56:
57: /* XXX preserve previous braindamaged behavior */
1.48 nicm 58: vsetnum(DC, 1);
1.1 deraadt 59:
1.39 nicm 60: if (strcmp(__progname, "cu") == 0) {
1.1 deraadt 61: cumode = 1;
62: cumain(argc, argv);
63: goto cucommon;
64: }
65:
66: if (argc > 4) {
1.34 sobrado 67: fprintf(stderr, "usage: tip [-nv] [-speed] [system-name]\n");
1.1 deraadt 68: exit(1);
69: }
70: if (!isatty(0)) {
1.13 millert 71: fprintf(stderr, "%s: must be interactive\n", __progname);
1.1 deraadt 72: exit(1);
73: }
74:
75: for (; argc > 1; argv++, argc--) {
76: if (argv[1][0] != '-')
1.27 deraadt 77: sys = argv[1];
1.1 deraadt 78: else switch (argv[1][1]) {
79:
80: case 'v':
81: vflag++;
82: break;
83:
1.9 todd 84: case 'n':
85: noesc++;
86: break;
87:
1.1 deraadt 88: case '0': case '1': case '2': case '3': case '4':
89: case '5': case '6': case '7': case '8': case '9':
1.48 nicm 90: vsetnum(BAUDRATE, atoi(&argv[1][1]));
1.1 deraadt 91: break;
92:
93: default:
1.13 millert 94: fprintf(stderr, "%s: %s, unknown option\n", __progname,
95: argv[1]);
1.1 deraadt 96: break;
97: }
98: }
99:
100: (void)signal(SIGINT, cleanup);
101: (void)signal(SIGQUIT, cleanup);
102: (void)signal(SIGHUP, cleanup);
103: (void)signal(SIGTERM, cleanup);
1.24 otto 104: (void)signal(SIGCHLD, SIG_DFL);
1.1 deraadt 105:
1.50 nicm 106: FD = hunt(sys);
1.1 deraadt 107: setbuf(stdout, NULL);
108: loginit();
109: vinit(); /* init variables */
1.12 millert 110: setparity("none"); /* set the parity table */
1.1 deraadt 111:
1.48 nicm 112: if (ttysetup(vgetnum(BAUDRATE))) {
1.49 nicm 113: fprintf(stderr, "%s: bad baud rate %d\n", __progname,
1.48 nicm 114: vgetnum(BAUDRATE));
1.19 millert 115: (void)uu_unlock(uucplock);
116: exit(3);
117: }
1.40 nicm 118: con();
1.41 nicm 119:
1.1 deraadt 120: cucommon:
121: /*
122: * From here down the code is shared with
123: * the "cu" version of tip.
124: */
1.10 jason 125:
126: i = fcntl(FD, F_GETFL);
127: if (i == -1) {
128: perror("fcntl");
1.23 deraadt 129: cleanup(0);
1.10 jason 130: }
131: i = fcntl(FD, F_SETFL, i & ~O_NONBLOCK);
132: if (i == -1) {
133: perror("fcntl");
1.23 deraadt 134: cleanup(0);
1.10 jason 135: }
1.1 deraadt 136:
1.2 deraadt 137: tcgetattr(0, &defterm);
1.22 deraadt 138: gotdefterm = 1;
1.2 deraadt 139: term = defterm;
140: term.c_lflag &= ~(ICANON|IEXTEN|ECHO);
141: term.c_iflag &= ~(INPCK|ICRNL);
142: term.c_oflag &= ~OPOST;
143: term.c_cc[VMIN] = 1;
144: term.c_cc[VTIME] = 0;
145: defchars = term;
146: term.c_cc[VINTR] = term.c_cc[VQUIT] = term.c_cc[VSUSP] =
1.25 deraadt 147: term.c_cc[VDSUSP] = term.c_cc[VDISCARD] =
148: term.c_cc[VLNEXT] = _POSIX_VDISABLE;
1.1 deraadt 149: raw();
150:
151: (void)signal(SIGALRM, timeout);
1.29 deraadt 152:
1.48 nicm 153: if (vgetnum(LINEDISC) != TTYDISC) {
154: int ld = (int)vgetnum(LINEDISC);
1.29 deraadt 155: ioctl(FD, TIOCSETD, &ld);
1.48 nicm 156: }
1.1 deraadt 157:
1.36 nicm 158: if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pair) != 0) {
159: (void)uu_unlock(uucplock);
160: err(3, "socketpair");
161: }
162:
1.1 deraadt 163: /*
164: * Everything's set up now:
165: * connection established (hardwired or dialup)
166: * line conditioned (baud rate, mode, etc.)
167: * internal data structures (variables)
168: * so, fork one process for local side and one for remote.
169: */
170: printf(cumode ? "Connected\r\n" : "\07connected\r\n");
1.23 deraadt 171: tipin_pid = getpid();
1.36 nicm 172: switch (tipout_pid = fork()) {
173: case -1:
174: (void)uu_unlock(uucplock);
175: err(3, "fork");
176: case 0:
177: close(pair[1]);
178: tipin_fd = pair[0];
179: tipout();
180: default:
181: close(pair[0]);
182: tipout_fd = pair[1];
1.1 deraadt 183: tipin();
1.36 nicm 184: }
1.1 deraadt 185: /*NOTREACHED*/
1.8 deraadt 186: exit(0);
1.40 nicm 187: }
188:
189: void
190: con(void)
191: {
1.48 nicm 192: if (vgetstr(CONNECT) != NULL)
193: parwrite(FD, vgetstr(CONNECT), size(vgetstr(CONNECT)));
194: logent(vgetstr(HOST), vgetstr(DEVICE), "call completed");
1.1 deraadt 195: }
196:
197: void
1.23 deraadt 198: cleanup(int signo)
1.1 deraadt 199: {
200: (void)uu_unlock(uucplock);
201: if (odisc)
1.27 deraadt 202: ioctl(0, TIOCSETD, &odisc);
1.22 deraadt 203: unraw();
1.23 deraadt 204: if (signo && tipout_pid) {
205: kill(tipout_pid, signo);
206: wait(NULL);
207: }
1.1 deraadt 208: exit(0);
209: }
210:
211: /*
212: * put the controlling keyboard into raw mode
213: */
1.8 deraadt 214: void
1.25 deraadt 215: raw(void)
1.1 deraadt 216: {
1.2 deraadt 217: tcsetattr(0, TCSADRAIN, &term);
1.1 deraadt 218: }
219:
220:
221: /*
222: * return keyboard to normal mode
223: */
1.8 deraadt 224: void
1.25 deraadt 225: unraw(void)
1.1 deraadt 226: {
1.22 deraadt 227: if (gotdefterm)
228: tcsetattr(0, TCSADRAIN, &defterm);
1.1 deraadt 229: }
230:
231: static jmp_buf promptbuf;
232:
233: /*
234: * Print string ``s'', then read a string
235: * in from the terminal. Handles signals & allows use of
236: * normal erase and kill characters.
237: */
1.8 deraadt 238: int
1.25 deraadt 239: prompt(char *s, char *p, size_t sz)
1.1 deraadt 240: {
1.15 millert 241: int c;
242: char *b = p;
1.1 deraadt 243: sig_t oint, oquit;
244:
245: stoprompt = 0;
246: oint = signal(SIGINT, intprompt);
247: oquit = signal(SIGQUIT, SIG_IGN);
248: unraw();
249: printf("%s", s);
250: if (setjmp(promptbuf) == 0)
1.6 millert 251: while ((c = getchar()) != EOF && (*p = c) != '\n' && --sz > 0)
1.1 deraadt 252: p++;
253: *p = '\0';
254:
255: raw();
256: (void)signal(SIGINT, oint);
257: (void)signal(SIGQUIT, oquit);
258: return (stoprompt || p == b);
259: }
260:
261: /*
262: * Interrupt service routine during prompting
263: */
1.27 deraadt 264: /*ARGSUSED*/
1.26 moritz 265: static void
266: intprompt(int signo)
1.1 deraadt 267: {
268: (void)signal(SIGINT, SIG_IGN);
269: stoprompt = 1;
270: printf("\r\n");
271: longjmp(promptbuf, 1);
272: }
273:
274: /*
275: * ****TIPIN TIPIN****
276: */
1.26 moritz 277: static void
1.25 deraadt 278: tipin(void)
1.1 deraadt 279: {
1.27 deraadt 280: int bol = 1;
1.16 deraadt 281: int gch;
1.17 deraadt 282: char ch;
1.1 deraadt 283:
284: /*
285: * Kinda klugey here...
286: * check for scripting being turned on from the .tiprc file,
287: * but be careful about just using setscript(), as we may
288: * send a SIGEMT before tipout has a chance to set up catching
289: * it; so wait a second, then setscript()
290: */
1.48 nicm 291: if (vgetnum(SCRIPT)) {
1.1 deraadt 292: sleep(1);
293: setscript();
294: }
295:
296: while (1) {
1.2 deraadt 297: gch = getchar()&STRIP_PAR;
1.16 deraadt 298: /* XXX does not check for EOF */
1.48 nicm 299: if (gch == vgetnum(ESCAPE) && bol) {
1.9 todd 300: if (!noesc) {
301: if (!(gch = escape()))
302: continue;
303: }
1.48 nicm 304: } else if (!cumode && gch == vgetnum(RAISECHAR)) {
305: vsetnum(RAISE, !vgetnum(RAISE));
1.1 deraadt 306: continue;
307: } else if (gch == '\r') {
308: bol = 1;
1.17 deraadt 309: ch = gch;
310: parwrite(FD, &ch, 1);
1.48 nicm 311: if (vgetnum(HALFDUPLEX))
1.1 deraadt 312: printf("\r\n");
313: continue;
1.48 nicm 314: } else if (!cumode && gch == vgetnum(FORCE))
315: gch = getchar() & STRIP_PAR;
316: bol = any(gch, vgetstr(EOL));
317: if (vgetnum(RAISE) && islower(gch))
1.1 deraadt 318: gch = toupper(gch);
1.17 deraadt 319: ch = gch;
320: parwrite(FD, &ch, 1);
1.48 nicm 321: if (vgetnum(HALFDUPLEX))
1.17 deraadt 322: printf("%c", ch);
1.1 deraadt 323: }
324: }
325:
326: extern esctable_t etable[];
327:
328: /*
329: * Escape handler --
330: * called on recognition of ``escapec'' at the beginning of a line
331: */
1.26 moritz 332: static int
1.25 deraadt 333: escape(void)
1.1 deraadt 334: {
1.16 deraadt 335: int gch;
1.15 millert 336: esctable_t *p;
1.48 nicm 337: char c = vgetnum(ESCAPE);
1.1 deraadt 338:
1.2 deraadt 339: gch = (getchar()&STRIP_PAR);
1.16 deraadt 340: /* XXX does not check for EOF */
1.1 deraadt 341: for (p = etable; p->e_char; p++)
342: if (p->e_char == gch) {
343: printf("%s", ctrl(c));
344: (*p->e_func)(gch);
345: return (0);
346: }
347: /* ESCAPE ESCAPE forces ESCAPE */
348: if (c != gch)
1.11 deraadt 349: parwrite(FD, &c, 1);
1.1 deraadt 350: return (gch);
351: }
352:
1.8 deraadt 353: int
1.25 deraadt 354: any(int cc, char *p)
1.1 deraadt 355: {
1.8 deraadt 356: char c = cc;
1.1 deraadt 357: while (p && *p)
358: if (*p++ == c)
359: return (1);
360: return (0);
361: }
362:
1.28 deraadt 363: size_t
1.25 deraadt 364: size(char *s)
1.1 deraadt 365: {
1.28 deraadt 366: size_t i = 0;
1.1 deraadt 367:
368: while (s && *s++)
369: i++;
370: return (i);
371: }
372:
373: char *
1.25 deraadt 374: interp(char *s)
1.1 deraadt 375: {
376: static char buf[256];
1.15 millert 377: char *p = buf, c, *q;
1.1 deraadt 378:
1.8 deraadt 379: while ((c = *s++)) {
1.1 deraadt 380: for (q = "\nn\rr\tt\ff\033E\bb"; *q; q++)
381: if (*q++ == c) {
382: *p++ = '\\'; *p++ = *q;
383: goto next;
384: }
385: if (c < 040) {
386: *p++ = '^'; *p++ = c + 'A'-1;
387: } else if (c == 0177) {
388: *p++ = '^'; *p++ = '?';
389: } else
390: *p++ = c;
391: next:
392: ;
393: }
394: *p = '\0';
395: return (buf);
396: }
397:
398: char *
1.25 deraadt 399: ctrl(char c)
1.1 deraadt 400: {
401: static char s[3];
402:
403: if (c < 040 || c == 0177) {
404: s[0] = '^';
405: s[1] = c == 0177 ? '?' : c+'A'-1;
406: s[2] = '\0';
407: } else {
408: s[0] = c;
409: s[1] = '\0';
410: }
411: return (s);
412: }
413:
414: /*
415: * Help command
416: */
1.8 deraadt 417: void
1.26 moritz 418: help(int c)
1.1 deraadt 419: {
1.15 millert 420: esctable_t *p;
1.1 deraadt 421:
422: printf("%c\r\n", c);
423: for (p = etable; p->e_char; p++) {
1.48 nicm 424: printf("%2s", ctrl(vgetnum(ESCAPE)));
1.37 nicm 425: printf("%-2s %s\r\n", ctrl(p->e_char), p->e_help);
1.1 deraadt 426: }
427: }
428:
429: /*
430: * Set up the "remote" tty's state
431: */
1.19 millert 432: int
1.25 deraadt 433: ttysetup(int speed)
1.1 deraadt 434: {
1.2 deraadt 435: struct termios cntrl;
1.1 deraadt 436:
1.19 millert 437: if (tcgetattr(FD, &cntrl))
438: return (-1);
439: cfsetspeed(&cntrl, speed);
1.2 deraadt 440: cntrl.c_cflag &= ~(CSIZE|PARENB);
441: cntrl.c_cflag |= CS8;
1.48 nicm 442: if (vgetnum(DC))
1.5 millert 443: cntrl.c_cflag |= CLOCAL;
1.48 nicm 444: if (vgetnum(HARDWAREFLOW))
1.25 deraadt 445: cntrl.c_cflag |= CRTSCTS;
1.2 deraadt 446: cntrl.c_iflag &= ~(ISTRIP|ICRNL);
447: cntrl.c_oflag &= ~OPOST;
448: cntrl.c_lflag &= ~(ICANON|ISIG|IEXTEN|ECHO);
449: cntrl.c_cc[VMIN] = 1;
450: cntrl.c_cc[VTIME] = 0;
1.48 nicm 451: if (vgetnum(TAND))
1.2 deraadt 452: cntrl.c_iflag |= IXOFF;
1.19 millert 453: return (tcsetattr(FD, TCSAFLUSH, &cntrl));
1.1 deraadt 454: }
455:
456: static char partab[0200];
457:
458: /*
459: * Do a write to the remote machine with the correct parity.
460: * We are doing 8 bit wide output, so we just generate a character
461: * with the right parity and output it.
462: */
1.8 deraadt 463: void
1.27 deraadt 464: parwrite(int fd, char *buf, size_t n)
1.1 deraadt 465: {
1.15 millert 466: int i;
467: char *bp;
1.1 deraadt 468:
469: bp = buf;
470: if (bits8 == 0)
471: for (i = 0; i < n; i++) {
472: *bp = partab[(*bp) & 0177];
473: bp++;
474: }
475: if (write(fd, buf, n) < 0) {
476: if (errno == EIO)
477: tipabort("Lost carrier.");
478: /* this is questionable */
1.48 nicm 479: abort();;//
1.1 deraadt 480: perror("write");
481: }
482: }
483:
484: /*
485: * Build a parity table with appropriate high-order bit.
486: */
1.8 deraadt 487: void
1.25 deraadt 488: setparity(char *defparity)
1.1 deraadt 489: {
1.15 millert 490: int i, flip, clr, set;
1.1 deraadt 491: char *parity;
1.4 millert 492: extern const unsigned char evenpartab[];
1.1 deraadt 493:
1.48 nicm 494: if (vgetstr(PARITY) == NULL)
495: vsetstr(PARITY, defparity);
496: parity = vgetstr(PARITY);
1.39 nicm 497: if (strcmp(parity, "none") == 0) {
1.1 deraadt 498: bits8 = 1;
499: return;
500: }
501: bits8 = 0;
502: flip = 0;
503: clr = 0377;
504: set = 0;
1.39 nicm 505: if (strcmp(parity, "odd") == 0)
1.1 deraadt 506: flip = 0200; /* reverse bit 7 */
1.39 nicm 507: else if (strcmp(parity, "zero") == 0)
1.1 deraadt 508: clr = 0177; /* turn off bit 7 */
1.39 nicm 509: else if (strcmp(parity, "one") == 0)
1.1 deraadt 510: set = 0200; /* turn on bit 7 */
1.39 nicm 511: else if (strcmp(parity, "even") != 0) {
1.1 deraadt 512: (void) fprintf(stderr, "%s: unknown parity value\r\n", parity);
513: (void) fflush(stderr);
514: }
515: for (i = 0; i < 0200; i++)
1.18 hugh 516: partab[i] = ((evenpartab[i] ^ flip) | set) & clr;
1.1 deraadt 517: }
![[BACK]](/icons/back.gif){kind=icon}
Return to tip.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / tip