Annotation of src/usr.bin/telnet/commands.c, Revision 1.80
1.80 ! jca 1: /* $OpenBSD: commands.c,v 1.79 2015/11/13 17:04:48 deraadt Exp $ */
1.4 deraadt 2: /* $NetBSD: commands.c,v 1.14 1996/03/24 22:03:48 jtk Exp $ */
1.3 niklas 3:
1.1 deraadt 4: /*
5: * Copyright (c) 1988, 1990, 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.
1.45 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:
1.10 art 33: #include "telnet_locl.h"
1.59 guenther 34:
1.62 guenther 35: #include <sys/socket.h>
1.59 guenther 36: #include <netinet/in.h>
37: #include <netinet/ip.h>
38: #include <arpa/inet.h>
1.62 guenther 39: #include <arpa/telnet.h>
1.59 guenther 40:
1.60 guenther 41: #include <ctype.h>
1.15 art 42: #include <err.h>
1.62 guenther 43: #include <errno.h>
1.61 guenther 44: #include <netdb.h>
1.59 guenther 45: #include <pwd.h>
46: #include <stdarg.h>
1.62 guenther 47: #include <stdlib.h>
48: #include <string.h>
1.60 guenther 49: #include <unistd.h>
1.71 deraadt 50: #include <limits.h>
1.1 deraadt 51:
52: char *hostname;
53:
54: typedef struct {
55: char *name; /* command name */
56: char *help; /* help string (NULL for no help) */
1.63 guenther 57: int (*handler)(int, char **);/* routine which executes command */
1.1 deraadt 58: int needconnect; /* Do we need to be connected to execute? */
59: } Command;
60:
61: static char line[256];
62: static int margc;
63: static char *margv[20];
64:
1.69 jsg 65: static void
66: makeargv(void)
1.1 deraadt 67: {
1.39 mpech 68: char *cp, *cp2, c;
69: char **argp = margv;
1.1 deraadt 70:
71: margc = 0;
72: cp = line;
1.10 art 73: while ((c = *cp)) {
1.39 mpech 74: int inquote = 0;
1.60 guenther 75: while (isspace((unsigned char)c))
1.1 deraadt 76: c = *++cp;
77: if (c == '\0')
78: break;
79: *argp++ = cp;
80: margc += 1;
81: for (cp2 = cp; c != '\0'; c = *++cp) {
82: if (inquote) {
83: if (c == inquote) {
84: inquote = 0;
85: continue;
86: }
87: } else {
88: if (c == '\\') {
89: if ((c = *++cp) == '\0')
90: break;
91: } else if (c == '"') {
92: inquote = '"';
93: continue;
94: } else if (c == '\'') {
95: inquote = '\'';
96: continue;
1.60 guenther 97: } else if (isspace((unsigned char)c))
1.1 deraadt 98: break;
99: }
100: *cp2++ = c;
101: }
102: *cp2 = '\0';
103: if (c == '\0')
104: break;
105: cp++;
106: }
107: *argp++ = 0;
108: }
109:
110: /*
111: * Make a character string into a number.
112: *
113: * Todo: 1. Could take random integers (12, 0x12, 012, 0b1).
114: */
115:
1.69 jsg 116: static char
117: special(char *s)
1.1 deraadt 118: {
1.39 mpech 119: char c;
1.1 deraadt 120: char b;
121:
122: switch (*s) {
123: case '^':
124: b = *++s;
125: if (b == '?') {
126: c = b | 0x40; /* DEL */
127: } else {
128: c = b & 0x1f;
129: }
130: break;
131: default:
132: c = *s;
133: break;
134: }
135: return c;
136: }
137:
138: /*
139: * Construct a control character sequence
140: * for a special character.
141: */
1.69 jsg 142: static char *
143: control(cc_t c)
1.1 deraadt 144: {
145: static char buf[5];
146: /*
147: * The only way I could get the Sun 3.5 compiler
148: * to shut up about
149: * if ((unsigned int)c >= 0x80)
150: * was to assign "c" to an unsigned int variable...
151: * Arggg....
152: */
1.39 mpech 153: unsigned int uic = (unsigned int)c;
1.1 deraadt 154:
155: if (uic == 0x7f)
156: return ("^?");
157: if (c == (cc_t)_POSIX_VDISABLE) {
158: return "off";
159: }
160: if (uic >= 0x80) {
161: buf[0] = '\\';
162: buf[1] = ((c>>6)&07) + '0';
163: buf[2] = ((c>>3)&07) + '0';
164: buf[3] = (c&07) + '0';
165: buf[4] = 0;
166: } else if (uic >= 0x20) {
167: buf[0] = c;
168: buf[1] = 0;
169: } else {
170: buf[0] = '^';
171: buf[1] = '@'+c;
172: buf[2] = 0;
173: }
174: return (buf);
175: }
176:
177: /*
178: * The following are data structures and routines for
179: * the "send" command.
180: *
181: */
1.3 niklas 182:
1.1 deraadt 183: struct sendlist {
184: char *name; /* How user refers to it (case independent) */
185: char *help; /* Help information (0 ==> no help) */
186: int needconnect; /* Need to be connected */
187: int narg; /* Number of arguments */
188: int (*handler)(); /* Routine to perform (for special ops) */
189: int nbyte; /* Number of bytes to send this command */
190: int what; /* Character to be sent (<0 ==> special) */
191: };
192:
193:
194: static int
1.41 millert 195: send_esc(void),
196: send_help(void),
197: send_docmd(char *),
198: send_dontcmd(char *),
199: send_willcmd(char *),
200: send_wontcmd(char *);
1.1 deraadt 201:
202: static struct sendlist Sendlist[] = {
203: { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO },
204: { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT },
205: { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK },
206: { "break", 0, 1, 0, 0, 2, BREAK },
207: { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC },
208: { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL },
209: { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 },
210: { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA },
211: { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP },
212: { "intp", 0, 1, 0, 0, 2, IP },
213: { "interrupt", 0, 1, 0, 0, 2, IP },
214: { "intr", 0, 1, 0, 0, 2, IP },
215: { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP },
216: { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR },
217: { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT },
218: { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP },
219: { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF },
220: { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 },
221: { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 },
222: { "?", "Display send options", 0, 0, send_help, 0, 0 },
223: { "help", 0, 0, 0, send_help, 0, 0 },
224: { "do", 0, 0, 1, send_docmd, 3, 0 },
225: { "dont", 0, 0, 1, send_dontcmd, 3, 0 },
226: { "will", 0, 0, 1, send_willcmd, 3, 0 },
227: { "wont", 0, 0, 1, send_wontcmd, 3, 0 },
228: { 0 }
229: };
230:
231: #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \
232: sizeof(struct sendlist)))
233:
1.69 jsg 234: static int
235: sendcmd(int argc, char **argv)
1.1 deraadt 236: {
237: int count; /* how many bytes we are going to need to send */
238: int i;
239: struct sendlist *s; /* pointer to current command */
240: int success = 0;
241: int needconnect = 0;
242:
243: if (argc < 2) {
1.10 art 244: printf("need at least one argument for 'send' command\r\n");
245: printf("'send ?' for help\r\n");
1.1 deraadt 246: return 0;
247: }
248: /*
249: * First, validate all the send arguments.
250: * In addition, we see how much space we are going to need, and
251: * whether or not we will be doing a "SYNCH" operation (which
252: * flushes the network queue).
253: */
254: count = 0;
255: for (i = 1; i < argc; i++) {
256: s = GETSEND(argv[i]);
257: if (s == 0) {
1.10 art 258: printf("Unknown send argument '%s'\r\n'send ?' for help.\r\n",
1.1 deraadt 259: argv[i]);
260: return 0;
261: } else if (Ambiguous(s)) {
1.10 art 262: printf("Ambiguous send argument '%s'\r\n'send ?' for help.\r\n",
1.1 deraadt 263: argv[i]);
264: return 0;
265: }
266: if (i + s->narg >= argc) {
267: fprintf(stderr,
1.10 art 268: "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\r\n",
1.1 deraadt 269: s->narg, s->narg == 1 ? "" : "s", s->name, s->name);
270: return 0;
271: }
272: count += s->nbyte;
273: if (s->handler == send_help) {
274: send_help();
275: return 0;
276: }
277:
278: i += s->narg;
279: needconnect += s->needconnect;
280: }
281: if (!connected && needconnect) {
1.10 art 282: printf("?Need to be connected first.\r\n");
283: printf("'send ?' for help\r\n");
1.1 deraadt 284: return 0;
285: }
286: /* Now, do we have enough room? */
287: if (NETROOM() < count) {
1.10 art 288: printf("There is not enough room in the buffer TO the network\r\n");
289: printf("to process your request. Nothing will be done.\r\n");
290: printf("('send synch' will throw away most data in the network\r\n");
291: printf("buffer, if this might help.)\r\n");
1.1 deraadt 292: return 0;
293: }
294: /* OK, they are all OK, now go through again and actually send */
295: count = 0;
296: for (i = 1; i < argc; i++) {
297: if ((s = GETSEND(argv[i])) == 0) {
1.10 art 298: fprintf(stderr, "Telnet 'send' error - argument disappeared!\r\n");
1.63 guenther 299: quit();
1.1 deraadt 300: }
301: if (s->handler) {
302: count++;
303: success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0,
304: (s->narg > 1) ? argv[i+2] : 0);
305: i += s->narg;
306: } else {
307: NET2ADD(IAC, s->what);
308: printoption("SENT", IAC, s->what);
309: }
310: }
311: return (count == success);
312: }
313:
1.69 jsg 314: static int send_tncmd(void (*func)(int, int), char *cmd, char *name);
1.10 art 315:
1.69 jsg 316: static int
317: send_esc(void)
1.1 deraadt 318: {
319: NETADD(escape);
320: return 1;
321: }
322:
1.69 jsg 323: static int
324: send_docmd(char *name)
1.1 deraadt 325: {
326: return(send_tncmd(send_do, "do", name));
327: }
328:
1.69 jsg 329: static int
330: send_dontcmd(char *name)
1.1 deraadt 331: {
332: return(send_tncmd(send_dont, "dont", name));
333: }
1.69 jsg 334:
335: static int
336: send_willcmd(char *name)
1.1 deraadt 337: {
338: return(send_tncmd(send_will, "will", name));
339: }
1.69 jsg 340:
341: static int
342: send_wontcmd(char *name)
1.1 deraadt 343: {
344: return(send_tncmd(send_wont, "wont", name));
345: }
346:
1.69 jsg 347: int
348: send_tncmd(void (*func)(int, int), char *cmd, char *name)
1.1 deraadt 349: {
350: char **cpp;
351: extern char *telopts[];
1.39 mpech 352: int val = 0;
1.1 deraadt 353:
1.10 art 354: if (isprefix(name, "help") || isprefix(name, "?")) {
1.39 mpech 355: int col, len;
1.1 deraadt 356:
1.10 art 357: printf("Usage: send %s <value|option>\r\n", cmd);
358: printf("\"value\" must be from 0 to 255\r\n");
359: printf("Valid options are:\r\n\t");
1.1 deraadt 360:
361: col = 8;
362: for (cpp = telopts; *cpp; cpp++) {
363: len = strlen(*cpp) + 3;
364: if (col + len > 65) {
1.10 art 365: printf("\r\n\t");
1.1 deraadt 366: col = 8;
367: }
368: printf(" \"%s\"", *cpp);
369: col += len;
370: }
1.10 art 371: printf("\r\n");
1.1 deraadt 372: return 0;
373: }
374: cpp = (char **)genget(name, telopts, sizeof(char *));
375: if (Ambiguous(cpp)) {
1.10 art 376: fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\r\n",
1.1 deraadt 377: name, cmd);
378: return 0;
379: }
380: if (cpp) {
381: val = cpp - telopts;
382: } else {
1.39 mpech 383: char *cp = name;
1.1 deraadt 384:
385: while (*cp >= '0' && *cp <= '9') {
386: val *= 10;
387: val += *cp - '0';
388: cp++;
389: }
390: if (*cp != 0) {
1.10 art 391: fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\r\n",
1.1 deraadt 392: name, cmd);
393: return 0;
394: } else if (val < 0 || val > 255) {
1.10 art 395: fprintf(stderr, "'%s': bad value ('send %s ?' for help).\r\n",
1.1 deraadt 396: name, cmd);
397: return 0;
398: }
399: }
400: if (!connected) {
1.10 art 401: printf("?Need to be connected first.\r\n");
1.1 deraadt 402: return 0;
403: }
404: (*func)(val, 1);
405: return 1;
406: }
407:
1.69 jsg 408: static int
409: send_help(void)
1.1 deraadt 410: {
411: struct sendlist *s; /* pointer to current command */
412: for (s = Sendlist; s->name; s++) {
413: if (s->help)
1.10 art 414: printf("%-15s %s\r\n", s->name, s->help);
1.1 deraadt 415: }
416: return(0);
417: }
418:
419: /*
420: * The following are the routines and data structures referred
421: * to by the arguments to the "toggle" command.
422: */
423:
1.69 jsg 424: static int
425: lclchars(int unused)
1.1 deraadt 426: {
427: donelclchars = 1;
428: return 1;
429: }
430:
1.69 jsg 431: static int
432: togcrlf(int unused)
1.1 deraadt 433: {
434: if (crlf) {
1.10 art 435: printf("Will send carriage returns as telnet <CR><LF>.\r\n");
1.1 deraadt 436: } else {
1.10 art 437: printf("Will send carriage returns as telnet <CR><NUL>.\r\n");
1.1 deraadt 438: }
439: return 1;
440: }
441:
442: int binmode;
443:
1.69 jsg 444: static int
445: togbinary(int val)
1.1 deraadt 446: {
447: donebinarytoggle = 1;
448:
449: if (val >= 0) {
450: binmode = val;
451: } else {
452: if (my_want_state_is_will(TELOPT_BINARY) &&
453: my_want_state_is_do(TELOPT_BINARY)) {
454: binmode = 1;
455: } else if (my_want_state_is_wont(TELOPT_BINARY) &&
456: my_want_state_is_dont(TELOPT_BINARY)) {
457: binmode = 0;
458: }
459: val = binmode ? 0 : 1;
460: }
461:
462: if (val == 1) {
463: if (my_want_state_is_will(TELOPT_BINARY) &&
464: my_want_state_is_do(TELOPT_BINARY)) {
1.10 art 465: printf("Already operating in binary mode with remote host.\r\n");
1.1 deraadt 466: } else {
1.10 art 467: printf("Negotiating binary mode with remote host.\r\n");
1.1 deraadt 468: tel_enter_binary(3);
469: }
470: } else {
471: if (my_want_state_is_wont(TELOPT_BINARY) &&
472: my_want_state_is_dont(TELOPT_BINARY)) {
1.10 art 473: printf("Already in network ascii mode with remote host.\r\n");
1.1 deraadt 474: } else {
1.10 art 475: printf("Negotiating network ascii mode with remote host.\r\n");
1.1 deraadt 476: tel_leave_binary(3);
477: }
478: }
479: return 1;
480: }
481:
1.69 jsg 482: static int
483: togrbinary(int val)
1.1 deraadt 484: {
485: donebinarytoggle = 1;
486:
487: if (val == -1)
488: val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1;
489:
490: if (val == 1) {
491: if (my_want_state_is_do(TELOPT_BINARY)) {
1.10 art 492: printf("Already receiving in binary mode.\r\n");
1.1 deraadt 493: } else {
1.10 art 494: printf("Negotiating binary mode on input.\r\n");
1.1 deraadt 495: tel_enter_binary(1);
496: }
497: } else {
498: if (my_want_state_is_dont(TELOPT_BINARY)) {
1.10 art 499: printf("Already receiving in network ascii mode.\r\n");
1.1 deraadt 500: } else {
1.10 art 501: printf("Negotiating network ascii mode on input.\r\n");
1.1 deraadt 502: tel_leave_binary(1);
503: }
504: }
505: return 1;
506: }
507:
1.69 jsg 508: static int
509: togxbinary(int val)
1.1 deraadt 510: {
511: donebinarytoggle = 1;
512:
513: if (val == -1)
514: val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1;
515:
516: if (val == 1) {
517: if (my_want_state_is_will(TELOPT_BINARY)) {
1.10 art 518: printf("Already transmitting in binary mode.\r\n");
1.1 deraadt 519: } else {
1.10 art 520: printf("Negotiating binary mode on output.\r\n");
1.1 deraadt 521: tel_enter_binary(2);
522: }
523: } else {
524: if (my_want_state_is_wont(TELOPT_BINARY)) {
1.10 art 525: printf("Already transmitting in network ascii mode.\r\n");
1.1 deraadt 526: } else {
1.10 art 527: printf("Negotiating network ascii mode on output.\r\n");
1.1 deraadt 528: tel_leave_binary(2);
529: }
530: }
531: return 1;
532: }
533:
534:
1.63 guenther 535: static int togglehelp(int);
1.1 deraadt 536:
537: struct togglelist {
1.63 guenther 538: char *name; /* name of toggle */
539: char *help; /* help message */
540: int (*handler)(int); /* routine to do actual setting */
1.1 deraadt 541: int *variable;
542: char *actionexplanation;
1.8 robin 543: int needconnect; /* Need to be connected */
1.1 deraadt 544: };
545:
546: static struct togglelist Togglelist[] = {
547: { "autoflush",
548: "flushing of output when sending interrupt characters",
549: 0,
550: &autoflush,
1.10 art 551: "flush output when sending interrupt characters" },
1.1 deraadt 552: { "autosynch",
553: "automatic sending of interrupt characters in urgent mode",
554: 0,
555: &autosynch,
1.10 art 556: "send interrupt characters in urgent mode" },
1.1 deraadt 557: { "autologin",
1.57 guenther 558: "automatic sending of login name",
1.1 deraadt 559: 0,
560: &autologin,
1.57 guenther 561: "send login name" },
1.1 deraadt 562: { "skiprc",
563: "don't read ~/.telnetrc file",
564: 0,
565: &skiprc,
1.10 art 566: "skip reading of ~/.telnetrc file" },
1.1 deraadt 567: { "binary",
568: "sending and receiving of binary data",
569: togbinary,
570: 0,
1.10 art 571: 0 },
1.1 deraadt 572: { "inbinary",
573: "receiving of binary data",
574: togrbinary,
575: 0,
1.10 art 576: 0 },
1.1 deraadt 577: { "outbinary",
578: "sending of binary data",
579: togxbinary,
580: 0,
1.10 art 581: 0 },
1.1 deraadt 582: { "crlf",
583: "sending carriage returns as telnet <CR><LF>",
584: togcrlf,
585: &crlf,
1.10 art 586: 0 },
1.1 deraadt 587: { "crmod",
588: "mapping of received carriage returns",
589: 0,
590: &crmod,
1.10 art 591: "map carriage return on output" },
1.1 deraadt 592: { "localchars",
593: "local recognition of certain control characters",
594: lclchars,
595: &localchars,
1.10 art 596: "recognize certain control characters" },
1.8 robin 597: { " ", "", 0, 0 }, /* empty line */
1.1 deraadt 598: { "netdata",
599: "printing of hexadecimal network data (debugging)",
600: 0,
601: &netdata,
1.10 art 602: "print hexadecimal representation of network traffic" },
1.1 deraadt 603: { "prettydump",
604: "output of \"netdata\" to user readable format (debugging)",
605: 0,
606: &prettydump,
1.10 art 607: "print user readable output for \"netdata\"" },
1.1 deraadt 608: { "options",
609: "viewing of options processing (debugging)",
610: 0,
611: &showoptions,
1.10 art 612: "show option processing" },
1.1 deraadt 613: { "termdata",
614: "(debugging) toggle printing of hexadecimal terminal data",
615: 0,
616: &termdata,
1.10 art 617: "print hexadecimal representation of terminal traffic" },
1.1 deraadt 618: { "?",
619: 0,
1.10 art 620: togglehelp },
1.1 deraadt 621: { "help",
622: 0,
1.10 art 623: togglehelp },
1.1 deraadt 624: { 0 }
625: };
626:
1.69 jsg 627: static int
1.63 guenther 628: togglehelp(int unused)
1.1 deraadt 629: {
630: struct togglelist *c;
631:
632: for (c = Togglelist; c->name; c++) {
633: if (c->help) {
634: if (*c->help)
1.10 art 635: printf("%-15s toggle %s\r\n", c->name, c->help);
1.1 deraadt 636: else
1.10 art 637: printf("\r\n");
1.1 deraadt 638: }
639: }
1.10 art 640: printf("\r\n");
641: printf("%-15s %s\r\n", "?", "display help information");
1.1 deraadt 642: return 0;
643: }
644:
1.69 jsg 645: static void
646: settogglehelp(int set)
1.1 deraadt 647: {
648: struct togglelist *c;
649:
650: for (c = Togglelist; c->name; c++) {
651: if (c->help) {
652: if (*c->help)
1.10 art 653: printf("%-15s %s %s\r\n", c->name, set ? "enable" : "disable",
1.1 deraadt 654: c->help);
655: else
1.10 art 656: printf("\r\n");
1.1 deraadt 657: }
658: }
659: }
660:
661: #define GETTOGGLE(name) (struct togglelist *) \
662: genget(name, (char **) Togglelist, sizeof(struct togglelist))
663:
1.69 jsg 664: static int
665: toggle(int argc, char *argv[])
1.1 deraadt 666: {
667: int retval = 1;
668: char *name;
669: struct togglelist *c;
670:
671: if (argc < 2) {
672: fprintf(stderr,
1.10 art 673: "Need an argument to 'toggle' command. 'toggle ?' for help.\r\n");
1.1 deraadt 674: return 0;
675: }
676: argc--;
677: argv++;
678: while (argc--) {
679: name = *argv++;
680: c = GETTOGGLE(name);
681: if (Ambiguous(c)) {
1.10 art 682: fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\r\n",
1.1 deraadt 683: name);
684: return 0;
685: } else if (c == 0) {
1.10 art 686: fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\r\n",
1.1 deraadt 687: name);
688: return 0;
1.8 robin 689: } else if (!connected && c->needconnect) {
1.10 art 690: printf("?Need to be connected first.\r\n");
691: printf("'send ?' for help\r\n");
1.8 robin 692: return 0;
1.1 deraadt 693: } else {
694: if (c->variable) {
695: *c->variable = !*c->variable; /* invert it */
696: if (c->actionexplanation) {
1.10 art 697: printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
1.1 deraadt 698: c->actionexplanation);
699: }
700: }
701: if (c->handler) {
702: retval &= (*c->handler)(-1);
703: }
704: }
705: }
706: return retval;
707: }
708:
709: /*
710: * The following perform the "set" command.
711: */
712:
1.10 art 713: struct termios new_tc = { 0 };
1.1 deraadt 714:
715: struct setlist {
716: char *name; /* name */
717: char *help; /* help information */
1.70 guenther 718: void (*handler)(const char *);
1.1 deraadt 719: cc_t *charp; /* where it is located at */
720: };
721:
722: static struct setlist Setlist[] = {
723: #ifdef KLUDGELINEMODE
724: { "echo", "character to toggle local echoing on/off", 0, &echoc },
725: #endif
726: { "escape", "character to escape back to telnet command mode", 0, &escape },
727: { "rlogin", "rlogin escape character", 0, &rlogin },
728: { " ", "" },
729: { " ", "The following need 'localchars' to be toggled true", 0, 0 },
1.10 art 730: { "flushoutput", "character to cause an Abort Output", 0, &termFlushChar },
731: { "interrupt", "character to cause an Interrupt Process", 0, &termIntChar },
732: { "quit", "character to cause an Abort process", 0, &termQuitChar },
733: { "eof", "character to cause an EOF ", 0, &termEofChar },
1.1 deraadt 734: { " ", "" },
735: { " ", "The following are for local editing in linemode", 0, 0 },
1.10 art 736: { "erase", "character to use to erase a character", 0, &termEraseChar },
737: { "kill", "character to use to erase a line", 0, &termKillChar },
738: { "lnext", "character to use for literal next", 0, &termLiteralNextChar },
739: { "susp", "character to cause a Suspend Process", 0, &termSuspChar },
740: { "reprint", "character to use for line reprint", 0, &termRprntChar },
741: { "worderase", "character to use to erase a word", 0, &termWerasChar },
742: { "start", "character to use for XON", 0, &termStartChar },
743: { "stop", "character to use for XOFF", 0, &termStopChar },
744: { "forw1", "alternate end of line character", 0, &termForw1Char },
745: { "forw2", "alternate end of line character", 0, &termForw2Char },
746: { "ayt", "alternate AYT character", 0, &termAytChar },
1.1 deraadt 747: { 0 }
748: };
749:
1.69 jsg 750: static struct setlist *
751: getset(char *name)
1.1 deraadt 752: {
753: return (struct setlist *)
754: genget(name, (char **) Setlist, sizeof(struct setlist));
755: }
756:
1.69 jsg 757: void
758: set_escape_char(char *s)
1.1 deraadt 759: {
760: if (rlogin != _POSIX_VDISABLE) {
761: rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE;
1.10 art 762: printf("Telnet rlogin escape character is '%s'.\r\n",
1.1 deraadt 763: control(rlogin));
764: } else {
765: escape = (s && *s) ? special(s) : _POSIX_VDISABLE;
1.10 art 766: printf("Telnet escape character is '%s'.\r\n", control(escape));
1.1 deraadt 767: }
768: }
769:
1.69 jsg 770: static int
771: setcmd(int argc, char *argv[])
1.1 deraadt 772: {
773: int value;
774: struct setlist *ct;
775: struct togglelist *c;
776:
777: if (argc < 2 || argc > 3) {
1.10 art 778: printf("Format is 'set Name Value'\r\n'set ?' for help.\r\n");
1.1 deraadt 779: return 0;
780: }
781: if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) {
782: for (ct = Setlist; ct->name; ct++)
1.10 art 783: printf("%-15s %s\r\n", ct->name, ct->help);
784: printf("\r\n");
1.1 deraadt 785: settogglehelp(1);
1.10 art 786: printf("%-15s %s\r\n", "?", "display help information");
1.1 deraadt 787: return 0;
788: }
789:
790: ct = getset(argv[1]);
791: if (ct == 0) {
792: c = GETTOGGLE(argv[1]);
793: if (c == 0) {
1.10 art 794: fprintf(stderr, "'%s': unknown argument ('set ?' for help).\r\n",
1.1 deraadt 795: argv[1]);
796: return 0;
797: } else if (Ambiguous(c)) {
1.10 art 798: fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\n",
1.1 deraadt 799: argv[1]);
800: return 0;
1.8 robin 801: } else if (!connected && c->needconnect) {
1.10 art 802: printf("?Need to be connected first.\r\n");
803: printf("'send ?' for help\r\n");
1.8 robin 804: return 0;
1.1 deraadt 805: }
1.8 robin 806:
1.1 deraadt 807: if (c->variable) {
808: if ((argc == 2) || (strcmp("on", argv[2]) == 0))
809: *c->variable = 1;
810: else if (strcmp("off", argv[2]) == 0)
811: *c->variable = 0;
812: else {
1.10 art 813: printf("Format is 'set togglename [on|off]'\r\n'set ?' for help.\r\n");
1.1 deraadt 814: return 0;
815: }
816: if (c->actionexplanation) {
1.10 art 817: printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
1.1 deraadt 818: c->actionexplanation);
819: }
820: }
821: if (c->handler)
822: (*c->handler)(1);
823: } else if (argc != 3) {
1.10 art 824: printf("Format is 'set Name Value'\r\n'set ?' for help.\r\n");
1.1 deraadt 825: return 0;
826: } else if (Ambiguous(ct)) {
1.10 art 827: fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\n",
1.1 deraadt 828: argv[1]);
829: return 0;
830: } else if (ct->handler) {
831: (*ct->handler)(argv[2]);
1.10 art 832: printf("%s set to \"%s\".\r\n", ct->name, (char *)ct->charp);
1.1 deraadt 833: } else {
834: if (strcmp("off", argv[2])) {
835: value = special(argv[2]);
836: } else {
837: value = _POSIX_VDISABLE;
838: }
839: *(ct->charp) = (cc_t)value;
1.10 art 840: printf("%s character is '%s'.\r\n", ct->name, control(*(ct->charp)));
1.1 deraadt 841: }
842: slc_check();
843: return 1;
844: }
845:
1.69 jsg 846: static int
847: unsetcmd(int argc, char *argv[])
1.1 deraadt 848: {
849: struct setlist *ct;
850: struct togglelist *c;
1.39 mpech 851: char *name;
1.1 deraadt 852:
853: if (argc < 2) {
854: fprintf(stderr,
1.10 art 855: "Need an argument to 'unset' command. 'unset ?' for help.\r\n");
1.1 deraadt 856: return 0;
857: }
858: if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) {
859: for (ct = Setlist; ct->name; ct++)
1.10 art 860: printf("%-15s %s\r\n", ct->name, ct->help);
861: printf("\r\n");
1.1 deraadt 862: settogglehelp(0);
1.10 art 863: printf("%-15s %s\r\n", "?", "display help information");
1.1 deraadt 864: return 0;
865: }
866:
867: argc--;
868: argv++;
869: while (argc--) {
870: name = *argv++;
871: ct = getset(name);
872: if (ct == 0) {
873: c = GETTOGGLE(name);
874: if (c == 0) {
1.10 art 875: fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\r\n",
1.1 deraadt 876: name);
877: return 0;
878: } else if (Ambiguous(c)) {
1.10 art 879: fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n",
1.1 deraadt 880: name);
881: return 0;
882: }
883: if (c->variable) {
884: *c->variable = 0;
885: if (c->actionexplanation) {
1.10 art 886: printf("%s %s.\r\n", *c->variable? "Will" : "Won't",
1.1 deraadt 887: c->actionexplanation);
888: }
889: }
890: if (c->handler)
891: (*c->handler)(0);
892: } else if (Ambiguous(ct)) {
1.10 art 893: fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n",
1.1 deraadt 894: name);
895: return 0;
896: } else if (ct->handler) {
1.63 guenther 897: (*ct->handler)(NULL);
1.10 art 898: printf("%s reset to \"%s\".\r\n", ct->name, (char *)ct->charp);
1.1 deraadt 899: } else {
900: *(ct->charp) = _POSIX_VDISABLE;
1.10 art 901: printf("%s character is '%s'.\r\n", ct->name, control(*(ct->charp)));
1.1 deraadt 902: }
903: }
904: return 1;
905: }
906:
907: /*
908: * The following are the data structures and routines for the
909: * 'mode' command.
910: */
911: #ifdef KLUDGELINEMODE
1.69 jsg 912: static int
913: dokludgemode(int unused)
1.1 deraadt 914: {
915: kludgelinemode = 1;
916: send_wont(TELOPT_LINEMODE, 1);
917: send_dont(TELOPT_SGA, 1);
918: send_dont(TELOPT_ECHO, 1);
1.10 art 919: return 1;
1.1 deraadt 920: }
921: #endif
922:
1.69 jsg 923: static int
924: dolinemode(int unused)
1.1 deraadt 925: {
926: #ifdef KLUDGELINEMODE
927: if (kludgelinemode)
928: send_dont(TELOPT_SGA, 1);
929: #endif
930: send_will(TELOPT_LINEMODE, 1);
931: send_dont(TELOPT_ECHO, 1);
932: return 1;
933: }
934:
1.69 jsg 935: static int
936: docharmode(int unused)
1.1 deraadt 937: {
938: #ifdef KLUDGELINEMODE
939: if (kludgelinemode)
940: send_do(TELOPT_SGA, 1);
941: else
942: #endif
943: send_wont(TELOPT_LINEMODE, 1);
944: send_do(TELOPT_ECHO, 1);
945: return 1;
946: }
947:
1.69 jsg 948: static int
949: dolmmode(int bit, int on)
1.1 deraadt 950: {
951: unsigned char c;
952:
953: if (my_want_state_is_wont(TELOPT_LINEMODE)) {
1.10 art 954: printf("?Need to have LINEMODE option enabled first.\r\n");
955: printf("'mode ?' for help.\r\n");
1.1 deraadt 956: return 0;
957: }
958:
959: if (on)
960: c = (linemode | bit);
961: else
962: c = (linemode & ~bit);
963: lm_mode(&c, 1, 1);
964: return 1;
965: }
966:
1.69 jsg 967: int
968: tn_setmode(int bit)
1.1 deraadt 969: {
970: return dolmmode(bit, 1);
971: }
972:
1.69 jsg 973: int
974: tn_clearmode(int bit)
1.1 deraadt 975: {
976: return dolmmode(bit, 0);
977: }
978:
979: struct modelist {
980: char *name; /* command name */
981: char *help; /* help string */
1.63 guenther 982: int (*handler)(int);/* routine which executes command */
1.1 deraadt 983: int needconnect; /* Do we need to be connected to execute? */
984: int arg1;
985: };
986:
1.63 guenther 987: static int modehelp(int);
1.1 deraadt 988:
989: static struct modelist ModeList[] = {
990: { "character", "Disable LINEMODE option", docharmode, 1 },
991: #ifdef KLUDGELINEMODE
992: { "", "(or disable obsolete line-by-line mode)", 0 },
993: #endif
994: { "line", "Enable LINEMODE option", dolinemode, 1 },
995: #ifdef KLUDGELINEMODE
996: { "", "(or enable obsolete line-by-line mode)", 0 },
997: #endif
998: { "", "", 0 },
999: { "", "These require the LINEMODE option to be enabled", 0 },
1.10 art 1000: { "isig", "Enable signal trapping", tn_setmode, 1, MODE_TRAPSIG },
1001: { "+isig", 0, tn_setmode, 1, MODE_TRAPSIG },
1002: { "-isig", "Disable signal trapping", tn_clearmode, 1, MODE_TRAPSIG },
1003: { "edit", "Enable character editing", tn_setmode, 1, MODE_EDIT },
1004: { "+edit", 0, tn_setmode, 1, MODE_EDIT },
1005: { "-edit", "Disable character editing", tn_clearmode, 1, MODE_EDIT },
1006: { "softtabs", "Enable tab expansion", tn_setmode, 1, MODE_SOFT_TAB },
1007: { "+softtabs", 0, tn_setmode, 1, MODE_SOFT_TAB },
1008: { "-softtabs", "Disable character editing", tn_clearmode, 1, MODE_SOFT_TAB },
1009: { "litecho", "Enable literal character echo", tn_setmode, 1, MODE_LIT_ECHO },
1010: { "+litecho", 0, tn_setmode, 1, MODE_LIT_ECHO },
1011: { "-litecho", "Disable literal character echo", tn_clearmode, 1, MODE_LIT_ECHO },
1.1 deraadt 1012: { "help", 0, modehelp, 0 },
1013: #ifdef KLUDGELINEMODE
1014: { "kludgeline", 0, dokludgemode, 1 },
1015: #endif
1016: { "", "", 0 },
1017: { "?", "Print help information", modehelp, 0 },
1018: { 0 },
1019: };
1020:
1.69 jsg 1021: static int
1.63 guenther 1022: modehelp(int unused)
1.1 deraadt 1023: {
1024: struct modelist *mt;
1025:
1.10 art 1026: printf("format is: 'mode Mode', where 'Mode' is one of:\r\n\r\n");
1.1 deraadt 1027: for (mt = ModeList; mt->name; mt++) {
1028: if (mt->help) {
1029: if (*mt->help)
1.10 art 1030: printf("%-15s %s\r\n", mt->name, mt->help);
1.1 deraadt 1031: else
1.10 art 1032: printf("\r\n");
1.1 deraadt 1033: }
1034: }
1035: return 0;
1036: }
1037:
1038: #define GETMODECMD(name) (struct modelist *) \
1039: genget(name, (char **) ModeList, sizeof(struct modelist))
1040:
1.69 jsg 1041: static int
1042: modecmd(int argc, char *argv[])
1.1 deraadt 1043: {
1044: struct modelist *mt;
1045:
1046: if (argc != 2) {
1.10 art 1047: printf("'mode' command requires an argument\r\n");
1048: printf("'mode ?' for help.\r\n");
1.1 deraadt 1049: } else if ((mt = GETMODECMD(argv[1])) == 0) {
1.10 art 1050: fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\r\n", argv[1]);
1.1 deraadt 1051: } else if (Ambiguous(mt)) {
1.10 art 1052: fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\r\n", argv[1]);
1.1 deraadt 1053: } else if (mt->needconnect && !connected) {
1.10 art 1054: printf("?Need to be connected first.\r\n");
1055: printf("'mode ?' for help.\r\n");
1.1 deraadt 1056: } else if (mt->handler) {
1057: return (*mt->handler)(mt->arg1);
1058: }
1059: return 0;
1060: }
1061:
1062: /*
1063: * The following data structures and routines implement the
1064: * "display" command.
1065: */
1066:
1.69 jsg 1067: static int
1068: display(int argc, char *argv[])
1.1 deraadt 1069: {
1070: struct togglelist *tl;
1071: struct setlist *sl;
1072:
1073: #define dotog(tl) if (tl->variable && tl->actionexplanation) { \
1074: if (*tl->variable) { \
1075: printf("will"); \
1076: } else { \
1077: printf("won't"); \
1078: } \
1.10 art 1079: printf(" %s.\r\n", tl->actionexplanation); \
1.1 deraadt 1080: }
1081:
1082: #define doset(sl) if (sl->name && *sl->name != ' ') { \
1083: if (sl->handler == 0) \
1.10 art 1084: printf("%-15s [%s]\r\n", sl->name, control(*sl->charp)); \
1.1 deraadt 1085: else \
1.10 art 1086: printf("%-15s \"%s\"\r\n", sl->name, (char *)sl->charp); \
1.1 deraadt 1087: }
1088:
1089: if (argc == 1) {
1090: for (tl = Togglelist; tl->name; tl++) {
1091: dotog(tl);
1092: }
1.10 art 1093: printf("\r\n");
1.1 deraadt 1094: for (sl = Setlist; sl->name; sl++) {
1095: doset(sl);
1096: }
1097: } else {
1098: int i;
1099:
1100: for (i = 1; i < argc; i++) {
1101: sl = getset(argv[i]);
1102: tl = GETTOGGLE(argv[i]);
1103: if (Ambiguous(sl) || Ambiguous(tl)) {
1.10 art 1104: printf("?Ambiguous argument '%s'.\r\n", argv[i]);
1.1 deraadt 1105: return 0;
1106: } else if (!sl && !tl) {
1.10 art 1107: printf("?Unknown argument '%s'.\r\n", argv[i]);
1.1 deraadt 1108: return 0;
1109: } else {
1110: if (tl) {
1111: dotog(tl);
1112: }
1113: if (sl) {
1114: doset(sl);
1115: }
1116: }
1117: }
1118: }
1119: /*@*/optionstatus();
1120: return 1;
1121: #undef doset
1122: #undef dotog
1123: }
1.10 art 1124:
1.1 deraadt 1125: /*
1126: * The following are the data structures, and many of the routines,
1127: * relating to command processing.
1128: */
1129:
1130: /*
1131: * Set the escape character.
1132: */
1.69 jsg 1133: static int
1134: setescape(int argc, char *argv[])
1.1 deraadt 1135: {
1.39 mpech 1136: char *arg;
1.1 deraadt 1137: char buf[50];
1138:
1139: printf(
1.10 art 1140: "Deprecated usage - please use 'set escape%s%s' in the future.\r\n",
1.1 deraadt 1141: (argc > 2)? " ":"", (argc > 2)? argv[1]: "");
1142: if (argc > 2)
1143: arg = argv[1];
1144: else {
1145: printf("new escape character: ");
1146: (void) fgets(buf, sizeof(buf), stdin);
1147: arg = buf;
1148: }
1149: if (arg[0] != '\0')
1150: escape = arg[0];
1.56 guenther 1151: printf("Escape character is '%s'.\r\n", control(escape));
1.1 deraadt 1152: (void) fflush(stdout);
1153: return 1;
1154: }
1155:
1.69 jsg 1156: static int
1157: togcrmod(int unused1, char *unused2[])
1.1 deraadt 1158: {
1159: crmod = !crmod;
1.10 art 1160: printf("Deprecated usage - please use 'toggle crmod' in the future.\r\n");
1161: printf("%s map carriage return on output.\r\n", crmod ? "Will" : "Won't");
1.1 deraadt 1162: (void) fflush(stdout);
1163: return 1;
1164: }
1165:
1.69 jsg 1166: int
1167: telnetsuspend(int unused1, char *unused2[])
1.1 deraadt 1168: {
1169: setcommandmode();
1170: {
1171: long oldrows, oldcols, newrows, newcols, err;
1172:
1173: err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0;
1174: (void) kill(0, SIGTSTP);
1175: /*
1176: * If we didn't get the window size before the SUSPEND, but we
1.3 niklas 1177: * can get them now (?), then send the NAWS to make sure that
1.1 deraadt 1178: * we are set up for the right window size.
1179: */
1180: if (TerminalWindowSize(&newrows, &newcols) && connected &&
1181: (err || ((oldrows != newrows) || (oldcols != newcols)))) {
1182: sendnaws();
1183: }
1184: }
1185: /* reget parameters in case they were changed */
1186: TerminalSaveState();
1187: setconnmode(0);
1188: return 1;
1189: }
1190:
1.68 guenther 1191: static void
1192: close_connection(void)
1193: {
1194: if (connected) {
1.80 ! jca 1195: (void) shutdown(net, SHUT_RDWR);
1.68 guenther 1196: printf("Connection closed.\r\n");
1197: (void)close(net);
1198: connected = 0;
1199: resettermname = 1;
1200: /* reset options */
1201: tninit();
1202: }
1203: }
1204:
1205: static int
1.69 jsg 1206: bye(int argc, char *argv[])
1.1 deraadt 1207: {
1.68 guenther 1208: close_connection();
1.1 deraadt 1209: longjmp(toplevel, 1);
1210: }
1211:
1.63 guenther 1212: void
1.59 guenther 1213: quit(void)
1.1 deraadt 1214: {
1.68 guenther 1215: close_connection();
1.1 deraadt 1216: Exit(0);
1217: }
1218:
1.63 guenther 1219: static int
1220: quitcmd(int unused1, char *unused2[])
1221: {
1222: quit();
1223: }
1224:
1.69 jsg 1225: static int
1226: logout(int unused1, char *unused2[])
1.1 deraadt 1227: {
1228: send_do(TELOPT_LOGOUT, 1);
1229: (void) netflush();
1230: return 1;
1231: }
1232:
1233:
1234: /*
1235: * The SLC command.
1236: */
1237:
1238: struct slclist {
1239: char *name;
1240: char *help;
1.63 guenther 1241: void (*handler)(int);
1.1 deraadt 1242: int arg;
1243: };
1244:
1.63 guenther 1245: static void slc_help(int);
1.1 deraadt 1246:
1247: struct slclist SlcList[] = {
1248: { "export", "Use local special character definitions",
1249: slc_mode_export, 0 },
1250: { "import", "Use remote special character definitions",
1251: slc_mode_import, 1 },
1252: { "check", "Verify remote special character definitions",
1253: slc_mode_import, 0 },
1254: { "help", 0, slc_help, 0 },
1255: { "?", "Print help information", slc_help, 0 },
1256: { 0 },
1257: };
1258:
1.69 jsg 1259: static void
1.63 guenther 1260: slc_help(int unused)
1.1 deraadt 1261: {
1262: struct slclist *c;
1263:
1264: for (c = SlcList; c->name; c++) {
1265: if (c->help) {
1266: if (*c->help)
1.10 art 1267: printf("%-15s %s\r\n", c->name, c->help);
1.1 deraadt 1268: else
1.10 art 1269: printf("\r\n");
1.1 deraadt 1270: }
1271: }
1272: }
1273:
1.69 jsg 1274: static struct slclist *
1275: getslc(char *name)
1.1 deraadt 1276: {
1277: return (struct slclist *)
1278: genget(name, (char **) SlcList, sizeof(struct slclist));
1279: }
1280:
1.69 jsg 1281: static int
1282: slccmd(int argc, char *argv[])
1.1 deraadt 1283: {
1284: struct slclist *c;
1285:
1286: if (argc != 2) {
1287: fprintf(stderr,
1.10 art 1288: "Need an argument to 'slc' command. 'slc ?' for help.\r\n");
1.1 deraadt 1289: return 0;
1290: }
1291: c = getslc(argv[1]);
1292: if (c == 0) {
1.10 art 1293: fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\r\n",
1.1 deraadt 1294: argv[1]);
1.3 niklas 1295: return 0;
1.1 deraadt 1296: }
1297: if (Ambiguous(c)) {
1.10 art 1298: fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\r\n",
1.1 deraadt 1299: argv[1]);
1.3 niklas 1300: return 0;
1.1 deraadt 1301: }
1302: (*c->handler)(c->arg);
1303: slcstate();
1304: return 1;
1305: }
1306:
1307: /*
1308: * The ENVIRON command.
1309: */
1310:
1311: struct envlist {
1312: char *name;
1313: char *help;
1314: void (*handler)();
1315: int narg;
1316: };
1317:
1.41 millert 1318: static void env_help(void);
1.70 guenther 1319: static void env_undefine(const char *);
1320: static void env_export(const char *);
1321: static void env_unexport(const char *);
1322: static void env_send(const char *);
1.67 guenther 1323: static void env_list(void);
1.70 guenther 1324: static struct env_lst *env_find(const char *var);
1.1 deraadt 1325:
1326: struct envlist EnvList[] = {
1327: { "define", "Define an environment variable",
1328: (void (*)())env_define, 2 },
1329: { "undefine", "Undefine an environment variable",
1330: env_undefine, 1 },
1331: { "export", "Mark an environment variable for automatic export",
1332: env_export, 1 },
1333: { "unexport", "Don't mark an environment variable for automatic export",
1334: env_unexport, 1 },
1335: { "send", "Send an environment variable", env_send, 1 },
1336: { "list", "List the current environment variables",
1337: env_list, 0 },
1338: { "help", 0, env_help, 0 },
1339: { "?", "Print help information", env_help, 0 },
1340: { 0 },
1341: };
1342:
1.67 guenther 1343: static void
1.69 jsg 1344: env_help(void)
1.1 deraadt 1345: {
1346: struct envlist *c;
1347:
1348: for (c = EnvList; c->name; c++) {
1349: if (c->help) {
1350: if (*c->help)
1.10 art 1351: printf("%-15s %s\r\n", c->name, c->help);
1.1 deraadt 1352: else
1.10 art 1353: printf("\r\n");
1.1 deraadt 1354: }
1355: }
1356: }
1357:
1.67 guenther 1358: static struct envlist *
1.69 jsg 1359: getenvcmd(char *name)
1.1 deraadt 1360: {
1361: return (struct envlist *)
1362: genget(name, (char **) EnvList, sizeof(struct envlist));
1363: }
1364:
1.67 guenther 1365: static int
1.69 jsg 1366: env_cmd(int argc, char *argv[])
1.1 deraadt 1367: {
1368: struct envlist *c;
1369:
1370: if (argc < 2) {
1371: fprintf(stderr,
1.10 art 1372: "Need an argument to 'environ' command. 'environ ?' for help.\r\n");
1.1 deraadt 1373: return 0;
1374: }
1375: c = getenvcmd(argv[1]);
1376: if (c == 0) {
1.10 art 1377: fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\r\n",
1.1 deraadt 1378: argv[1]);
1.3 niklas 1379: return 0;
1.1 deraadt 1380: }
1381: if (Ambiguous(c)) {
1.10 art 1382: fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\r\n",
1.1 deraadt 1383: argv[1]);
1.3 niklas 1384: return 0;
1.1 deraadt 1385: }
1386: if (c->narg + 2 != argc) {
1387: fprintf(stderr,
1.10 art 1388: "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\r\n",
1.1 deraadt 1389: c->narg < argc + 2 ? "only " : "",
1390: c->narg, c->narg == 1 ? "" : "s", c->name);
1391: return 0;
1392: }
1393: (*c->handler)(argv[2], argv[3]);
1394: return 1;
1395: }
1396:
1397: struct env_lst {
1398: struct env_lst *next; /* pointer to next structure */
1399: struct env_lst *prev; /* pointer to previous structure */
1.70 guenther 1400: char *var; /* pointer to variable name */
1401: char *value; /* pointer to variable value */
1.1 deraadt 1402: int export; /* 1 -> export with default list of variables */
1403: int welldefined; /* A well defined variable */
1404: };
1405:
1406: struct env_lst envlisthead;
1407:
1.67 guenther 1408: static struct env_lst *
1.70 guenther 1409: env_find(const char *var)
1.1 deraadt 1410: {
1.39 mpech 1411: struct env_lst *ep;
1.1 deraadt 1412:
1413: for (ep = envlisthead.next; ep; ep = ep->next) {
1.70 guenther 1414: if (strcmp(ep->var, var) == 0)
1.1 deraadt 1415: return(ep);
1416: }
1417: return(NULL);
1418: }
1419:
1.69 jsg 1420: void
1421: env_init(void)
1.1 deraadt 1422: {
1423: extern char **environ;
1.10 art 1424: char **epp, *cp;
1425: struct env_lst *ep;
1.1 deraadt 1426:
1427: for (epp = environ; *epp; epp++) {
1.10 art 1428: if ((cp = strchr(*epp, '='))) {
1.1 deraadt 1429: *cp = '\0';
1.70 guenther 1430: ep = env_define(*epp, cp+1);
1.1 deraadt 1431: ep->export = 0;
1432: *cp = '=';
1433: }
1434: }
1435: /*
1436: * Special case for DISPLAY variable. If it is ":0.0" or
1437: * "unix:0.0", we have to get rid of "unix" and insert our
1438: * hostname.
1439: */
1440: if ((ep = env_find("DISPLAY"))
1441: && ((*ep->value == ':')
1.70 guenther 1442: || (strncmp(ep->value, "unix:", 5) == 0))) {
1.71 deraadt 1443: char hbuf[HOST_NAME_MAX+1];
1.70 guenther 1444: char *cp2 = strchr(ep->value, ':');
1.1 deraadt 1445:
1.18 deraadt 1446: gethostname(hbuf, sizeof hbuf);
1.10 art 1447:
1448: /* If this is not the full name, try to get it via DNS */
1449: if (strchr(hbuf, '.') == 0) {
1450: struct hostent *he = gethostbyname(hbuf);
1451: if (he != 0)
1.19 deraadt 1452: strncpy(hbuf, he->h_name, sizeof hbuf-1);
1453: hbuf[sizeof hbuf-1] = '\0';
1.10 art 1454: }
1455:
1.44 pvalchev 1456: if (asprintf (&cp, "%s%s", hbuf, cp2) == -1)
1.14 art 1457: err(1, "asprintf");
1.10 art 1458:
1.1 deraadt 1459: free(ep->value);
1.70 guenther 1460: ep->value = cp;
1.1 deraadt 1461: }
1462: /*
1463: * If USER is not defined, but LOGNAME is, then add
1464: * USER with the value from LOGNAME. By default, we
1465: * don't export the USER variable.
1466: */
1467: if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) {
1.70 guenther 1468: env_define("USER", ep->value);
1469: env_unexport("USER");
1.1 deraadt 1470: }
1.70 guenther 1471: env_export("DISPLAY");
1472: env_export("PRINTER");
1473: env_export("XAUTHORITY");
1.1 deraadt 1474: }
1475:
1.69 jsg 1476: struct env_lst *
1.70 guenther 1477: env_define(const char *var, const char *value)
1.1 deraadt 1478: {
1.39 mpech 1479: struct env_lst *ep;
1.1 deraadt 1480:
1.10 art 1481: if ((ep = env_find(var))) {
1.1 deraadt 1482: if (ep->var)
1483: free(ep->var);
1484: if (ep->value)
1485: free(ep->value);
1486: } else {
1.14 art 1487: if ((ep = malloc(sizeof(struct env_lst))) == NULL)
1488: err(1, "malloc");
1.1 deraadt 1489: ep->next = envlisthead.next;
1490: envlisthead.next = ep;
1491: ep->prev = &envlisthead;
1492: if (ep->next)
1493: ep->next->prev = ep;
1494: }
1.70 guenther 1495: ep->welldefined = opt_welldefined(var);
1.1 deraadt 1496: ep->export = 1;
1.70 guenther 1497: if ((ep->var = strdup(var)) == NULL)
1.14 art 1498: err(1, "strdup");
1.70 guenther 1499: if ((ep->value = strdup(value)) == NULL)
1.14 art 1500: err(1, "strdup");
1.1 deraadt 1501: return(ep);
1502: }
1503:
1.67 guenther 1504: static void
1.70 guenther 1505: env_undefine(const char *var)
1.1 deraadt 1506: {
1.39 mpech 1507: struct env_lst *ep;
1.1 deraadt 1508:
1.10 art 1509: if ((ep = env_find(var))) {
1.1 deraadt 1510: ep->prev->next = ep->next;
1511: if (ep->next)
1512: ep->next->prev = ep->prev;
1513: if (ep->var)
1514: free(ep->var);
1515: if (ep->value)
1516: free(ep->value);
1517: free(ep);
1518: }
1519: }
1520:
1.67 guenther 1521: static void
1.70 guenther 1522: env_export(const char *var)
1.1 deraadt 1523: {
1.39 mpech 1524: struct env_lst *ep;
1.1 deraadt 1525:
1.10 art 1526: if ((ep = env_find(var)))
1.1 deraadt 1527: ep->export = 1;
1528: }
1529:
1.67 guenther 1530: static void
1.70 guenther 1531: env_unexport(const char *var)
1.1 deraadt 1532: {
1.39 mpech 1533: struct env_lst *ep;
1.1 deraadt 1534:
1.15 art 1535: if ((ep = env_find(var)) != NULL)
1.1 deraadt 1536: ep->export = 0;
1537: }
1538:
1.67 guenther 1539: static void
1.70 guenther 1540: env_send(const char *var)
1.1 deraadt 1541: {
1.39 mpech 1542: struct env_lst *ep;
1.1 deraadt 1543:
1.3 niklas 1544: if (my_state_is_wont(TELOPT_NEW_ENVIRON)
1.1 deraadt 1545: ) {
1546: fprintf(stderr,
1.10 art 1547: "Cannot send '%s': Telnet ENVIRON option not enabled\r\n",
1.1 deraadt 1548: var);
1549: return;
1550: }
1551: ep = env_find(var);
1552: if (ep == 0) {
1.10 art 1553: fprintf(stderr, "Cannot send '%s': variable not defined\r\n",
1.1 deraadt 1554: var);
1555: return;
1556: }
1557: env_opt_start_info();
1558: env_opt_add(ep->var);
1559: env_opt_end(0);
1560: }
1561:
1.67 guenther 1562: static void
1.69 jsg 1563: env_list(void)
1.1 deraadt 1564: {
1.39 mpech 1565: struct env_lst *ep;
1.1 deraadt 1566:
1567: for (ep = envlisthead.next; ep; ep = ep->next) {
1.10 art 1568: printf("%c %-20s %s\r\n", ep->export ? '*' : ' ',
1.1 deraadt 1569: ep->var, ep->value);
1570: }
1571: }
1572:
1.70 guenther 1573: char *
1.69 jsg 1574: env_default(int init, int welldefined)
1.1 deraadt 1575: {
1576: static struct env_lst *nep = NULL;
1577:
1578: if (init) {
1579: nep = &envlisthead;
1.10 art 1580: return NULL;
1.1 deraadt 1581: }
1582: if (nep) {
1.10 art 1583: while ((nep = nep->next)) {
1.1 deraadt 1584: if (nep->export && (nep->welldefined == welldefined))
1585: return(nep->var);
1586: }
1587: }
1588: return(NULL);
1589: }
1590:
1.70 guenther 1591: char *
1592: env_getvalue(const char *var, int exported_only)
1.1 deraadt 1593: {
1.39 mpech 1594: struct env_lst *ep;
1.1 deraadt 1595:
1.48 otto 1596: if ((ep = env_find(var)) && (!exported_only || ep->export))
1.1 deraadt 1597: return(ep->value);
1598: return(NULL);
1599: }
1600:
1.68 guenther 1601: static void
1602: connection_status(int local_only)
1603: {
1604: if (!connected)
1605: printf("No connection.\r\n");
1606: else {
1607: printf("Connected to %s.\r\n", hostname);
1608: if (!local_only) {
1609: int mode = getconnmode();
1610:
1611: printf("Operating ");
1612: if (my_want_state_is_will(TELOPT_LINEMODE)) {
1613: printf("with LINEMODE option\r\n"
1614: "%s line editing\r\n"
1615: "%s catching of signals\r\n",
1616: (mode & MODE_EDIT) ? "Local" : "No",
1617: (mode & MODE_TRAPSIG) ? "Local" : "No");
1618: slcstate();
1619: #ifdef KLUDGELINEMODE
1620: } else if (kludgelinemode &&
1621: my_want_state_is_dont(TELOPT_SGA)) {
1622: printf("in obsolete linemode\r\n");
1623: #endif
1624: } else {
1625: printf("in single character mode\r\n");
1626: if (localchars)
1627: printf("Catching signals locally\r\n");
1628: }
1629:
1630: printf("%s character echo\r\n",
1631: (mode & MODE_ECHO) ? "Local" : "Remote");
1632: if (my_want_state_is_will(TELOPT_LFLOW))
1633: printf("%s flow control\r\n",
1634: (mode & MODE_FLOW) ? "Local" : "No");
1635: }
1636: }
1637: printf("Escape character is '%s'.\r\n", control(escape));
1638: (void) fflush(stdout);
1639: }
1640:
1.1 deraadt 1641: /*
1642: * Print status about the connection.
1643: */
1.68 guenther 1644: static int
1645: status(int argc, char *argv[])
1.1 deraadt 1646: {
1.68 guenther 1647: connection_status(0);
1648: return 1;
1.1 deraadt 1649: }
1650:
1651: #ifdef SIGINFO
1652: /*
1653: * Function that gets called when SIGINFO is received.
1654: */
1.10 art 1655: void
1.68 guenther 1656: ayt_status(int sig)
1.1 deraadt 1657: {
1.68 guenther 1658: connection_status(1);
1.1 deraadt 1659: }
1660: #endif
1661:
1.10 art 1662: static Command *getcmd(char *name);
1663:
1664: static void
1665: cmdrc(char *m1, char *m2)
1666: {
1667: static char rcname[128];
1668: Command *c;
1669: FILE *rcfile;
1670: int gotmachine = 0;
1671: int l1 = strlen(m1);
1672: int l2 = strlen(m2);
1.71 deraadt 1673: char m1save[HOST_NAME_MAX+1];
1.10 art 1674:
1675: if (skiprc)
1676: return;
1677:
1.34 aaron 1678: strlcpy(m1save, m1, sizeof(m1save));
1.10 art 1679: m1 = m1save;
1680:
1681: if (rcname[0] == 0) {
1682: char *home = getenv("HOME");
1683:
1.29 millert 1684: if (home == NULL || *home == '\0')
1685: return;
1.10 art 1686: snprintf (rcname, sizeof(rcname), "%s/.telnetrc",
1687: home ? home : "");
1688: }
1689:
1690: if ((rcfile = fopen(rcname, "r")) == 0) {
1691: return;
1692: }
1693:
1694: for (;;) {
1695: if (fgets(line, sizeof(line), rcfile) == NULL)
1696: break;
1697: if (line[0] == 0)
1698: break;
1699: if (line[0] == '#')
1700: continue;
1701: if (gotmachine) {
1.60 guenther 1702: if (!isspace((unsigned char)line[0]))
1.10 art 1703: gotmachine = 0;
1704: }
1705: if (gotmachine == 0) {
1.60 guenther 1706: if (isspace((unsigned char)line[0]))
1.10 art 1707: continue;
1708: if (strncasecmp(line, m1, l1) == 0)
1709: strncpy(line, &line[l1], sizeof(line) - l1);
1710: else if (strncasecmp(line, m2, l2) == 0)
1711: strncpy(line, &line[l2], sizeof(line) - l2);
1712: else if (strncasecmp(line, "DEFAULT", 7) == 0)
1713: strncpy(line, &line[7], sizeof(line) - 7);
1714: else
1715: continue;
1716: if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n')
1717: continue;
1718: gotmachine = 1;
1719: }
1720: makeargv();
1721: if (margv[0] == 0)
1722: continue;
1723: c = getcmd(margv[0]);
1724: if (Ambiguous(c)) {
1725: printf("?Ambiguous command: %s\r\n", margv[0]);
1726: continue;
1727: }
1728: if (c == 0) {
1729: printf("?Invalid command: %s\r\n", margv[0]);
1730: continue;
1731: }
1732: /*
1733: * This should never happen...
1734: */
1735: if (c->needconnect && !connected) {
1736: printf("?Need to be connected first for %s.\r\n", margv[0]);
1737: continue;
1738: }
1739: (*c->handler)(margc, margv);
1740: }
1741: fclose(rcfile);
1742: }
1743:
1.69 jsg 1744: int
1745: tn(int argc, char *argv[])
1.1 deraadt 1746: {
1.23 itojun 1747: struct addrinfo hints, *res, *res0;
1.5 niklas 1748: char *cmd, *hostp = 0, *portp = 0, *user = 0, *aliasp = 0;
1.73 jca 1749: int error, retry;
1.74 jca 1750: const int niflags = NI_NUMERICHOST, tos = IPTOS_LOWDELAY;
1.1 deraadt 1751:
1752: if (connected) {
1.10 art 1753: printf("?Already connected to %s\r\n", hostname);
1.1 deraadt 1754: return 0;
1755: }
1756: if (argc < 2) {
1.43 hin 1757: strlcpy(line, "open ", sizeof(line));
1.1 deraadt 1758: printf("(to) ");
1759: (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin);
1760: makeargv();
1761: argc = margc;
1762: argv = margv;
1763: }
1764: cmd = *argv;
1765: --argc; ++argv;
1766: while (argc) {
1.3 niklas 1767: if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?"))
1.1 deraadt 1768: goto usage;
1769: if (strcmp(*argv, "-l") == 0) {
1770: --argc; ++argv;
1771: if (argc == 0)
1772: goto usage;
1.14 art 1773: if ((user = strdup(*argv++)) == NULL)
1774: err(1, "strdup");
1.1 deraadt 1775: --argc;
1776: continue;
1777: }
1.5 niklas 1778: if (strcmp(*argv, "-b") == 0) {
1779: --argc; ++argv;
1780: if (argc == 0)
1781: goto usage;
1782: aliasp = *argv++;
1783: --argc;
1784: continue;
1785: }
1.1 deraadt 1786: if (strcmp(*argv, "-a") == 0) {
1787: --argc; ++argv;
1788: autologin = 1;
1789: continue;
1790: }
1791: if (hostp == 0) {
1792: hostp = *argv++;
1793: --argc;
1794: continue;
1795: }
1796: if (portp == 0) {
1797: portp = *argv++;
1798: --argc;
1799: continue;
1800: }
1801: usage:
1.56 guenther 1802: printf("usage: %s [-a] [-b hostalias] [-l user] host-name [port]\r\n", cmd);
1.1 deraadt 1803: return 0;
1804: }
1805: if (hostp == 0)
1806: goto usage;
1807:
1.72 jca 1808: hostname = hostp;
1809: memset(&hints, 0, sizeof(hints));
1810: hints.ai_family = family;
1811: hints.ai_socktype = SOCK_STREAM;
1812: hints.ai_flags = AI_CANONNAME;
1813: if (portp == NULL) {
1814: portp = "telnet";
1815: telnetport = 1;
1816: } else if (*portp == '-') {
1817: portp++;
1818: telnetport = 1;
1.23 itojun 1819: } else
1.72 jca 1820: telnetport = 0;
1821: error = getaddrinfo(hostp, portp, &hints, &res0);
1822: if (error) {
1823: if (error == EAI_SERVICE)
1824: warnx("%s: bad port", portp);
1825: else
1826: warnx("%s: %s", hostp, gai_strerror(error));
1827: return 0;
1.1 deraadt 1828: }
1.10 art 1829:
1.23 itojun 1830: net = -1;
1831: retry = 0;
1832: for (res = res0; res; res = res->ai_next) {
1833: if (1 /* retry */) {
1.31 itojun 1834: char hbuf[NI_MAXHOST];
1.23 itojun 1835:
1.31 itojun 1836: if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
1837: NULL, 0, niflags) != 0) {
1.43 hin 1838: strlcpy(hbuf, "(invalid)", sizeof(hbuf));
1.31 itojun 1839: }
1.23 itojun 1840: printf("Trying %s...\r\n", hbuf);
1841: }
1842: net = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
1843: if (net < 0)
1844: continue;
1.10 art 1845:
1.5 niklas 1846: if (aliasp) {
1.23 itojun 1847: struct addrinfo ahints, *ares;
1848:
1849: memset(&ahints, 0, sizeof(ahints));
1.46 otto 1850: ahints.ai_family = family;
1.23 itojun 1851: ahints.ai_socktype = SOCK_STREAM;
1852: ahints.ai_flags = AI_PASSIVE;
1853: error = getaddrinfo(aliasp, "0", &ahints, &ares);
1854: if (error) {
1855: warn("%s: %s", aliasp, gai_strerror(error));
1856: close(net);
1.49 otto 1857: net = -1;
1.23 itojun 1858: continue;
1.5 niklas 1859: }
1.32 itojun 1860: if (bind(net, ares->ai_addr, ares->ai_addrlen) < 0) {
1.31 itojun 1861: perror(aliasp);
1862: (void) close(net); /* dump descriptor */
1.49 otto 1863: net = -1;
1.23 itojun 1864: freeaddrinfo(ares);
1865: continue;
1.5 niklas 1866: }
1.23 itojun 1867: freeaddrinfo(ares);
1868: }
1.74 jca 1869:
1870: switch (res->ai_family) {
1871: case AF_INET:
1872: if (setsockopt(net, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)) < 0
1873: && errno != ENOPROTOOPT)
1874: perror("telnet: setsockopt (IP_TOS) (ignored)");
1875: break;
1876: case AF_INET6:
1877: if (setsockopt(net, IPPROTO_IPV6, IPV6_TCLASS, &tos,
1878: sizeof(tos)) < 0 && errno != ENOPROTOOPT)
1879: perror("telnet: setsockopt (IPV6_TCLASS) (ignored)");
1880: break;
1.1 deraadt 1881: }
1882:
1.23 itojun 1883: if (connect(net, res->ai_addr, res->ai_addrlen) < 0) {
1.31 itojun 1884: char hbuf[NI_MAXHOST];
1.16 deraadt 1885:
1.31 itojun 1886: if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
1887: NULL, 0, niflags) != 0) {
1.43 hin 1888: strlcpy(hbuf, "(invalid)", sizeof(hbuf));
1.31 itojun 1889: }
1.25 itojun 1890: fprintf(stderr, "telnet: connect to address %s: %s\n", hbuf,
1891: strerror(errno));
1.23 itojun 1892:
1893: close(net);
1894: net = -1;
1895: retry++;
1896: continue;
1.1 deraadt 1897: }
1.23 itojun 1898:
1.1 deraadt 1899: connected++;
1.23 itojun 1900: break;
1901: }
1902: freeaddrinfo(res0);
1903: if (net < 0) {
1904: return 0;
1905: }
1.1 deraadt 1906: cmdrc(hostp, hostname);
1907: if (autologin && user == NULL) {
1908: struct passwd *pw;
1909:
1.58 guenther 1910: user = getlogin();
1.1 deraadt 1911: if (user == NULL ||
1.58 guenther 1912: (pw = getpwnam(user)) == NULL || pw->pw_uid != getuid()) {
1.15 art 1913: if ((pw = getpwuid(getuid())) != NULL)
1.1 deraadt 1914: user = pw->pw_name;
1915: else
1916: user = NULL;
1917: }
1918: }
1919: if (user) {
1.70 guenther 1920: env_define("USER", user);
1921: env_export("USER");
1.1 deraadt 1922: }
1.68 guenther 1923: connection_status(1);
1.1 deraadt 1924: if (setjmp(peerdied) == 0)
1925: telnet(user);
1.67 guenther 1926: (void)close(net);
1.10 art 1927: ExitString("Connection closed by foreign host.\r\n",1);
1.1 deraadt 1928: }
1929:
1930: #define HELPINDENT (sizeof ("connect"))
1931:
1932: static char
1933: openhelp[] = "connect to a site",
1934: closehelp[] = "close current connection",
1935: logouthelp[] = "forcibly logout remote user and close the connection",
1936: quithelp[] = "exit telnet",
1937: statushelp[] = "print status information",
1938: helphelp[] = "print help information",
1939: sendhelp[] = "transmit special characters ('send ?' for more)",
1940: sethelp[] = "set operating parameters ('set ?' for more)",
1941: unsethelp[] = "unset operating parameters ('unset ?' for more)",
1942: togglestring[] ="toggle operating parameters ('toggle ?' for more)",
1943: slchelp[] = "change state of special charaters ('slc ?' for more)",
1944: displayhelp[] = "display operating parameters",
1945: zhelp[] = "suspend telnet",
1946: envhelp[] = "change environment variables ('environ ?' for more)",
1947: modestring[] = "try to enter line or character mode ('mode ?' for more)";
1948:
1.40 millert 1949: static int help(int, char**);
1.1 deraadt 1950:
1951: static Command cmdtab[] = {
1952: { "close", closehelp, bye, 1 },
1953: { "logout", logouthelp, logout, 1 },
1954: { "display", displayhelp, display, 0 },
1955: { "mode", modestring, modecmd, 0 },
1956: { "open", openhelp, tn, 0 },
1.63 guenther 1957: { "quit", quithelp, quitcmd, 0 },
1.1 deraadt 1958: { "send", sendhelp, sendcmd, 0 },
1959: { "set", sethelp, setcmd, 0 },
1960: { "unset", unsethelp, unsetcmd, 0 },
1961: { "status", statushelp, status, 0 },
1962: { "toggle", togglestring, toggle, 0 },
1963: { "slc", slchelp, slccmd, 0 },
1.10 art 1964:
1965: { "z", zhelp, telnetsuspend, 0 },
1.1 deraadt 1966: { "environ", envhelp, env_cmd, 0 },
1967: { "?", helphelp, help, 0 },
1.10 art 1968: { 0, 0, 0, 0 }
1.1 deraadt 1969: };
1970:
1971: static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead";
1972: static char escapehelp[] = "deprecated command -- use 'set escape' instead";
1973:
1974: static Command cmdtab2[] = {
1975: { "help", 0, help, 0 },
1976: { "escape", escapehelp, setescape, 0 },
1977: { "crmod", crmodhelp, togcrmod, 0 },
1.10 art 1978: { 0, 0, 0, 0 }
1.1 deraadt 1979: };
1980:
1981:
1.69 jsg 1982: static Command *
1983: getcmd(char *name)
1.1 deraadt 1984: {
1985: Command *cm;
1986:
1.10 art 1987: if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))))
1.1 deraadt 1988: return cm;
1989: return (Command *) genget(name, (char **) cmdtab2, sizeof(Command));
1990: }
1991:
1.69 jsg 1992: void
1993: command(int top, char *tbuf, int cnt)
1.1 deraadt 1994: {
1.39 mpech 1995: Command *c;
1.1 deraadt 1996:
1997: setcommandmode();
1998: if (!top) {
1999: putchar('\n');
2000: } else {
2001: (void) signal(SIGINT, SIG_DFL);
2002: (void) signal(SIGQUIT, SIG_DFL);
2003: }
2004: for (;;) {
2005: if (rlogin == _POSIX_VDISABLE)
2006: printf("%s> ", prompt);
2007: if (tbuf) {
1.39 mpech 2008: char *cp;
1.1 deraadt 2009: cp = line;
2010: while (cnt > 0 && (*cp++ = *tbuf++) != '\n')
2011: cnt--;
2012: tbuf = 0;
2013: if (cp == line || *--cp != '\n' || cp == line)
2014: goto getline;
2015: *cp = '\0';
2016: if (rlogin == _POSIX_VDISABLE)
1.10 art 2017: printf("%s\r\n", line);
1.1 deraadt 2018: } else {
2019: getline:
2020: if (rlogin != _POSIX_VDISABLE)
2021: printf("%s> ", prompt);
2022: if (fgets(line, sizeof(line), stdin) == NULL) {
1.66 guenther 2023: if (feof(stdin) || ferror(stdin))
1.63 guenther 2024: quit();
1.1 deraadt 2025: break;
2026: }
2027: }
2028: if (line[0] == 0)
2029: break;
2030: makeargv();
2031: if (margv[0] == 0) {
2032: break;
2033: }
2034: c = getcmd(margv[0]);
2035: if (Ambiguous(c)) {
1.10 art 2036: printf("?Ambiguous command\r\n");
1.1 deraadt 2037: continue;
2038: }
2039: if (c == 0) {
1.10 art 2040: printf("?Invalid command\r\n");
1.1 deraadt 2041: continue;
2042: }
2043: if (c->needconnect && !connected) {
1.10 art 2044: printf("?Need to be connected first.\r\n");
1.1 deraadt 2045: continue;
2046: }
2047: if ((*c->handler)(margc, margv)) {
2048: break;
2049: }
2050: }
2051: if (!top) {
1.66 guenther 2052: if (!connected)
1.1 deraadt 2053: longjmp(toplevel, 1);
2054: setconnmode(0);
2055: }
2056: }
2057:
2058: /*
2059: * Help command.
2060: */
1.69 jsg 2061: static int
2062: help(int argc, char *argv[])
1.1 deraadt 2063: {
1.39 mpech 2064: Command *c;
1.1 deraadt 2065:
2066: if (argc == 1) {
1.10 art 2067: printf("Commands may be abbreviated. Commands are:\r\n\r\n");
1.1 deraadt 2068: for (c = cmdtab; c->name; c++)
2069: if (c->help) {
1.37 deraadt 2070: printf("%-*s\t%s\r\n", (int)HELPINDENT, c->name,
1.1 deraadt 2071: c->help);
2072: }
2073: return 0;
2074: }
2075: while (--argc > 0) {
1.39 mpech 2076: char *arg;
1.1 deraadt 2077: arg = *++argv;
2078: c = getcmd(arg);
2079: if (Ambiguous(c))
1.10 art 2080: printf("?Ambiguous help command %s\r\n", arg);
1.1 deraadt 2081: else if (c == (Command *)0)
1.10 art 2082: printf("?Invalid help command %s\r\n", arg);
1.1 deraadt 2083: else
1.10 art 2084: printf("%s\r\n", c->help);
1.1 deraadt 2085: }
2086: return 0;
2087: }
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