[9] | 1 | /*
|
---|
| 2 | * Copyright (c) 1983, 1990 The Regents of the University of California.
|
---|
| 3 | * All rights reserved.
|
---|
| 4 | *
|
---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
---|
| 6 | * modification, are permitted provided that the following conditions
|
---|
| 7 | * are met:
|
---|
| 8 | * 1. Redistributions of source code must retain the above copyright
|
---|
| 9 | * notice, this list of conditions and the following disclaimer.
|
---|
| 10 | * 2. Redistributions in binary form must reproduce the above copyright
|
---|
| 11 | * notice, this list of conditions and the following disclaimer in the
|
---|
| 12 | * documentation and/or other materials provided with the distribution.
|
---|
| 13 | * 3. All advertising materials mentioning features or use of this software
|
---|
| 14 | * must display the following acknowledgement:
|
---|
| 15 | * This product includes software developed by the University of
|
---|
| 16 | * California, Berkeley and its contributors.
|
---|
| 17 | * 4. Neither the name of the University nor the names of its contributors
|
---|
| 18 | * may be used to endorse or promote products derived from this software
|
---|
| 19 | * without specific prior written permission.
|
---|
| 20 | *
|
---|
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
---|
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
---|
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
---|
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
---|
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
---|
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
---|
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
---|
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
---|
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
---|
| 31 | * SUCH DAMAGE.
|
---|
| 32 | */
|
---|
| 33 |
|
---|
| 34 | #ifndef lint
|
---|
| 35 | char copyright[] =
|
---|
| 36 | "@(#) Copyright (c) 1983, 1990 The Regents of the University of California.\n\
|
---|
| 37 | All rights reserved.\n";
|
---|
| 38 | #endif /* not lint */
|
---|
| 39 |
|
---|
| 40 | #ifndef lint
|
---|
| 41 | #ifdef ID
|
---|
| 42 | static char sccsid[] = "@(#)rlogin.c 5.33 (Berkeley) 3/1/91";
|
---|
| 43 | #endif
|
---|
| 44 | #endif /* not lint */
|
---|
| 45 |
|
---|
| 46 | /*
|
---|
| 47 | * $Source: /cvsup/minix/src/commands/simple/rlogin.c,v $
|
---|
| 48 | * $Header: mit/rlogin/RCS/rlogin.c,v 5.2 89/07/26 12:11:21 kfall
|
---|
| 49 | * Exp Locker: kfall $
|
---|
| 50 | */
|
---|
| 51 |
|
---|
| 52 | /*
|
---|
| 53 | * rlogin - remote login
|
---|
| 54 | */
|
---|
| 55 | #include <sys/ioctl.h>
|
---|
| 56 | #include <sys/types.h>
|
---|
| 57 | #include <sys/wait.h>
|
---|
| 58 |
|
---|
| 59 | #include <net/netlib.h>
|
---|
| 60 | #include <net/hton.h>
|
---|
| 61 | #include <net/gen/in.h>
|
---|
| 62 | #include <net/gen/netdb.h>
|
---|
| 63 | #include <net/gen/tcp.h>
|
---|
| 64 | #include <net/gen/tcp_io.h>
|
---|
| 65 |
|
---|
| 66 | #include <termios.h>
|
---|
| 67 | #include <setjmp.h>
|
---|
| 68 | #include <errno.h>
|
---|
| 69 | #include <pwd.h>
|
---|
| 70 | #include <stdio.h>
|
---|
| 71 | #include <unistd.h>
|
---|
| 72 | #include <string.h>
|
---|
| 73 | #include <assert.h>
|
---|
| 74 | #include <ctype.h>
|
---|
| 75 | #include <fcntl.h>
|
---|
| 76 | #include <signal.h>
|
---|
| 77 | #include <stdlib.h>
|
---|
| 78 |
|
---|
| 79 | #ifdef KERBEROS
|
---|
| 80 | #include <kerberosIV/des.h>
|
---|
| 81 | #include <kerberosIV/krb.h>
|
---|
| 82 |
|
---|
| 83 | CREDENTIALS cred;
|
---|
| 84 | Key_schedule schedule;
|
---|
| 85 | int use_kerberos = 1, doencrypt;
|
---|
| 86 | char dst_realm_buf[REALM_SZ], *dest_realm = NULL;
|
---|
| 87 | extern char *krb_realmofhost();
|
---|
| 88 | #endif
|
---|
| 89 |
|
---|
| 90 | #ifndef TIOCPKT_WINDOW
|
---|
| 91 | #define TIOCPKT_WINDOW 0x80
|
---|
| 92 | #endif
|
---|
| 93 |
|
---|
| 94 | /* concession to Sun */
|
---|
| 95 | #ifndef SIGUSR1
|
---|
| 96 | #define SIGUSR1 30
|
---|
| 97 | #endif
|
---|
| 98 |
|
---|
| 99 | extern int errno;
|
---|
| 100 | int eight, litout, rem;
|
---|
| 101 |
|
---|
| 102 | int noescape;
|
---|
| 103 | u_char escapechar = '~';
|
---|
| 104 |
|
---|
| 105 | struct speed
|
---|
| 106 | {
|
---|
| 107 | speed_t speed;
|
---|
| 108 | char *name;
|
---|
| 109 | } speeds[] = {
|
---|
| 110 | { B0, "0" }, { B50, "50" }, { B75, "75" }, { B110, "110" },
|
---|
| 111 | { B134, "134" }, { B150, "150" }, { B200, "200" }, { B300, "300" },
|
---|
| 112 | { B600, "600" }, { B1200, "1200" }, { B1800, "1800" },
|
---|
| 113 | { B2400, "2400" }, { B4800, "4800" }, { B9600, "9600" },
|
---|
| 114 | { B19200, "19200" }, { B38400, "38400" }, { B57600, "57600" },
|
---|
| 115 | { B115200, "115200" },
|
---|
| 116 | { -1, NULL },
|
---|
| 117 | };
|
---|
| 118 |
|
---|
| 119 | #if __minix_vmd
|
---|
| 120 | /* flow control variables */
|
---|
| 121 | int more2read_0;
|
---|
| 122 | int inprogress_0;
|
---|
| 123 | int more2write_1;
|
---|
| 124 | int inprogress_1;
|
---|
| 125 | int more2read_rem;
|
---|
| 126 | int inprogress_rd_rem;
|
---|
| 127 | int more2write_rem;
|
---|
| 128 | int inprogress_wr_rem;
|
---|
| 129 |
|
---|
| 130 | /* write to remote */
|
---|
| 131 | size_t wr_rem_size;
|
---|
| 132 | size_t wr_rem_offset;
|
---|
| 133 | size_t extra_wr_rem_size;
|
---|
| 134 | size_t extra_wr_rem_offset;
|
---|
| 135 | char *extra_wr_rem;
|
---|
| 136 | size_t extra_wr_rem_new_size;
|
---|
| 137 | char *extra_wr_rem_new;
|
---|
| 138 |
|
---|
| 139 | #endif /* __minix_vmd */
|
---|
| 140 |
|
---|
| 141 | struct winsize winsize;
|
---|
| 142 |
|
---|
| 143 | #define get_window_size(fd, wp) ioctl(fd, TIOCGWINSZ, wp)
|
---|
| 144 |
|
---|
| 145 | extern int main _ARGS(( int argc, char **argv ));
|
---|
| 146 | static void usage _ARGS(( void ));
|
---|
| 147 | static u_char getescape _ARGS(( char *p ));
|
---|
| 148 | static char *speeds2str _ARGS(( speed_t speed ));
|
---|
| 149 | static void lostpeer _ARGS(( int sig ));
|
---|
| 150 | static void doit _ARGS(( void ));
|
---|
| 151 | static void setsignal _ARGS(( int sig, void (*act)(int sig) ));
|
---|
| 152 | static void msg _ARGS(( char *str ));
|
---|
| 153 | static void done _ARGS(( int status ));
|
---|
| 154 | #if !__minix_vmd
|
---|
| 155 | static int reader _ARGS(( void ));
|
---|
| 156 | #endif
|
---|
| 157 | static void mode _ARGS(( int f ));
|
---|
| 158 | #if __minix_vmd
|
---|
| 159 | static void mark_async _ARGS(( int fd ));
|
---|
| 160 | static void init_0 _ARGS(( void ));
|
---|
| 161 | static void init_1 _ARGS(( void ));
|
---|
| 162 | static void init_rd_rem _ARGS(( void ));
|
---|
| 163 | static void init_wr_rem _ARGS(( void ));
|
---|
| 164 | static void restart_0 _ARGS(( void ));
|
---|
| 165 | static void restart_1 _ARGS(( void ));
|
---|
| 166 | static void restart_rd_rem _ARGS(( void ));
|
---|
| 167 | static void restart_wr_rem _ARGS(( void ));
|
---|
| 168 | static void completed_0 _ARGS(( int result, int error ));
|
---|
| 169 | static void completed_1 _ARGS(( int result, int error ));
|
---|
| 170 | static void completed_rd_rem _ARGS(( int result, int error ));
|
---|
| 171 | static void completed_wr_rem _ARGS(( int result, int error ));
|
---|
| 172 | static void do_urg _ARGS(( int urg_byte ));
|
---|
| 173 | #endif
|
---|
| 174 | #if !__minix_vmd
|
---|
| 175 | static void catch_child _ARGS(( int sig ));
|
---|
| 176 | static void writer _ARGS(( void ));
|
---|
| 177 | #endif
|
---|
| 178 | static void echo _ARGS(( int c ));
|
---|
| 179 | #if __minix_vmd
|
---|
| 180 | static void finish _ARGS(( void ));
|
---|
| 181 | static void sendwindow _ARGS(( void ));
|
---|
| 182 | static void sigwinch _ARGS(( int sig ));
|
---|
| 183 | static void subshell _ARGS(( void ));
|
---|
| 184 | #endif
|
---|
| 185 |
|
---|
| 186 | int main(argc, argv)
|
---|
| 187 | int argc;
|
---|
| 188 | char **argv;
|
---|
| 189 | {
|
---|
| 190 | extern char *optarg;
|
---|
| 191 | extern int optind;
|
---|
| 192 | struct passwd *pw;
|
---|
| 193 | struct servent *sp;
|
---|
| 194 | struct termios ttyb;
|
---|
| 195 | nwio_tcpopt_t tcpopt;
|
---|
| 196 | int error;
|
---|
| 197 | int argoff, ch, dflag, one, uid;
|
---|
| 198 | char *host, *p, *user, term[1024];
|
---|
| 199 |
|
---|
| 200 | argoff = dflag = 0;
|
---|
| 201 | one = 1;
|
---|
| 202 | host = user = NULL;
|
---|
| 203 |
|
---|
| 204 | if (p = rindex(argv[0], '/'))
|
---|
| 205 | ++p;
|
---|
| 206 | else
|
---|
| 207 | p = argv[0];
|
---|
| 208 |
|
---|
| 209 | if (strcmp(p, "rlogin"))
|
---|
| 210 | host = p;
|
---|
| 211 |
|
---|
| 212 | /* handle "rlogin host flags" */
|
---|
| 213 | if (!host && argc > 2 && argv[1][0] != '-') {
|
---|
| 214 | host = argv[1];
|
---|
| 215 | argoff = 1;
|
---|
| 216 | }
|
---|
| 217 |
|
---|
| 218 | #ifdef KERBEROS
|
---|
| 219 | #define OPTIONS "8EKLde:k:l:x"
|
---|
| 220 | #else
|
---|
| 221 | #define OPTIONS "8EKLde:l:"
|
---|
| 222 | #endif
|
---|
| 223 | while ((ch = getopt(argc - argoff, argv + argoff, OPTIONS)) != EOF)
|
---|
| 224 | switch(ch) {
|
---|
| 225 | case '8':
|
---|
| 226 | eight = 1;
|
---|
| 227 | break;
|
---|
| 228 | case 'E':
|
---|
| 229 | noescape = 1;
|
---|
| 230 | break;
|
---|
| 231 | case 'K':
|
---|
| 232 | #ifdef KERBEROS
|
---|
| 233 | use_kerberos = 0;
|
---|
| 234 | #endif
|
---|
| 235 | break;
|
---|
| 236 | case 'L':
|
---|
| 237 | litout = 1;
|
---|
| 238 | break;
|
---|
| 239 | case 'd':
|
---|
| 240 | dflag = 1;
|
---|
| 241 | break;
|
---|
| 242 | case 'e':
|
---|
| 243 | escapechar = getescape(optarg);
|
---|
| 244 | break;
|
---|
| 245 | #ifdef KERBEROS
|
---|
| 246 | case 'k':
|
---|
| 247 | dest_realm = dst_realm_buf;
|
---|
| 248 | (void)strncpy(dest_realm, optarg, REALM_SZ);
|
---|
| 249 | break;
|
---|
| 250 | #endif
|
---|
| 251 | case 'l':
|
---|
| 252 | user = optarg;
|
---|
| 253 | break;
|
---|
| 254 | #ifdef CRYPT
|
---|
| 255 | #ifdef KERBEROS
|
---|
| 256 | case 'x':
|
---|
| 257 | doencrypt = 1;
|
---|
| 258 | des_set_key(cred.session, schedule);
|
---|
| 259 | break;
|
---|
| 260 | #endif
|
---|
| 261 | #endif
|
---|
| 262 | case '?':
|
---|
| 263 | default:
|
---|
| 264 | usage();
|
---|
| 265 | }
|
---|
| 266 | optind += argoff;
|
---|
| 267 | argc -= optind;
|
---|
| 268 | argv += optind;
|
---|
| 269 |
|
---|
| 270 | /* if haven't gotten a host yet, do so */
|
---|
| 271 | if (!host && !(host = *argv++))
|
---|
| 272 | usage();
|
---|
| 273 |
|
---|
| 274 | if (*argv)
|
---|
| 275 | usage();
|
---|
| 276 |
|
---|
| 277 | if (!(pw = getpwuid(uid = getuid()))) {
|
---|
| 278 | (void)fprintf(stderr, "rlogin: unknown user id.\n");
|
---|
| 279 | exit(1);
|
---|
| 280 | }
|
---|
| 281 | if (!user)
|
---|
| 282 | user = pw->pw_name;
|
---|
| 283 |
|
---|
| 284 | sp = NULL;
|
---|
| 285 | #ifdef KERBEROS
|
---|
| 286 | if (use_kerberos) {
|
---|
| 287 | sp = getservbyname((doencrypt ? "eklogin" : "klogin"), "tcp");
|
---|
| 288 | if (sp == NULL) {
|
---|
| 289 | use_kerberos = 0;
|
---|
| 290 | warning("can't get entry for %s/tcp service",
|
---|
| 291 | doencrypt ? "eklogin" : "klogin");
|
---|
| 292 | }
|
---|
| 293 | }
|
---|
| 294 | #endif
|
---|
| 295 | if (sp == NULL)
|
---|
| 296 | sp = getservbyname("login", "tcp");
|
---|
| 297 | if (sp == NULL) {
|
---|
| 298 | (void)fprintf(stderr, "rlogin: login/tcp: unknown service.\n");
|
---|
| 299 | exit(1);
|
---|
| 300 | }
|
---|
| 301 |
|
---|
| 302 | (void)strncpy(term, (p = getenv("TERM")) ? p : "network", sizeof(term));
|
---|
| 303 | term[sizeof(term)-1]= 0;
|
---|
| 304 |
|
---|
| 305 | if (tcgetattr(0, &ttyb) == 0) {
|
---|
| 306 | (void)strcat(term, "/");
|
---|
| 307 | (void)strcat(term, speeds2str(cfgetospeed(&ttyb)));
|
---|
| 308 | }
|
---|
| 309 |
|
---|
| 310 | (void)get_window_size(0, &winsize);
|
---|
| 311 |
|
---|
| 312 | (void)signal(SIGPIPE, lostpeer);
|
---|
| 313 |
|
---|
| 314 | #ifdef KERBEROS
|
---|
| 315 | try_connect:
|
---|
| 316 | if (use_kerberos) {
|
---|
| 317 | rem = KSUCCESS;
|
---|
| 318 | errno = 0;
|
---|
| 319 | if (dest_realm == NULL)
|
---|
| 320 | dest_realm = krb_realmofhost(host);
|
---|
| 321 |
|
---|
| 322 | #ifdef CRYPT
|
---|
| 323 | if (doencrypt)
|
---|
| 324 | rem = krcmd_mutual(&host, sp->s_port, user, term, 0,
|
---|
| 325 | dest_realm, &cred, schedule);
|
---|
| 326 | else
|
---|
| 327 | #endif /* CRYPT */
|
---|
| 328 | rem = krcmd(&host, sp->s_port, user, term, 0,
|
---|
| 329 | dest_realm);
|
---|
| 330 | if (rem < 0) {
|
---|
| 331 | use_kerberos = 0;
|
---|
| 332 | sp = getservbyname("login", "tcp");
|
---|
| 333 | if (sp == NULL) {
|
---|
| 334 | (void)fprintf(stderr,
|
---|
| 335 | "rlogin: unknown service login/tcp.\n");
|
---|
| 336 | exit(1);
|
---|
| 337 | }
|
---|
| 338 | if (errno == ECONNREFUSED)
|
---|
| 339 | warning("remote host doesn't support Kerberos");
|
---|
| 340 | if (errno == ENOENT)
|
---|
| 341 | warning("can't provide Kerberos auth data");
|
---|
| 342 | goto try_connect;
|
---|
| 343 | }
|
---|
| 344 | } else {
|
---|
| 345 | #ifdef CRYPT
|
---|
| 346 | if (doencrypt) {
|
---|
| 347 | (void)fprintf(stderr,
|
---|
| 348 | "rlogin: the -x flag requires Kerberos authentication.\n");
|
---|
| 349 | exit(1);
|
---|
| 350 | }
|
---|
| 351 | #endif /* CRYPT */
|
---|
| 352 | rem = rcmd(&host, sp->s_port, pw->pw_name, user, term, 0);
|
---|
| 353 | }
|
---|
| 354 | #else
|
---|
| 355 | rem = rcmd(&host, sp->s_port, pw->pw_name, user, term, 0);
|
---|
| 356 | #endif /* KERBEROS */
|
---|
| 357 |
|
---|
| 358 | if (rem < 0)
|
---|
| 359 | exit(1);
|
---|
| 360 |
|
---|
| 361 | /* Enable BSD compatibility for urgent data. */
|
---|
| 362 | tcpopt.nwto_flags= NWTO_BSD_URG;
|
---|
| 363 | error= ioctl(rem, NWIOSTCPOPT, &tcpopt);
|
---|
| 364 | if (error == -1)
|
---|
| 365 | {
|
---|
| 366 | fprintf(stderr, "rlogin: NWIOSTCPOPT failed: %s\n",
|
---|
| 367 | strerror(errno));
|
---|
| 368 | }
|
---|
| 369 |
|
---|
| 370 | (void)setuid(uid);
|
---|
| 371 | doit();
|
---|
| 372 | /*NOTREACHED*/
|
---|
| 373 | }
|
---|
| 374 |
|
---|
| 375 | struct termios defattr, rawattr;
|
---|
| 376 | #if __minix_vmd
|
---|
| 377 | int mustsendwindow;
|
---|
| 378 | #else
|
---|
| 379 | int child;
|
---|
| 380 | #endif
|
---|
| 381 |
|
---|
| 382 | static void
|
---|
| 383 | doit()
|
---|
| 384 | {
|
---|
| 385 | struct termios sb;
|
---|
| 386 | #if !__minix_vmd
|
---|
| 387 | int r;
|
---|
| 388 | #else
|
---|
| 389 | asio_fd_set_t fd_set;
|
---|
| 390 | struct fwait fw;
|
---|
| 391 | int result;
|
---|
| 392 | #endif
|
---|
| 393 |
|
---|
| 394 | (void)tcgetattr(0, &sb);
|
---|
| 395 | defattr = sb;
|
---|
| 396 | rawattr = sb;
|
---|
| 397 |
|
---|
| 398 | rawattr.c_iflag &= ~(ICRNL | IGNCR | INLCR | ISTRIP | IXOFF | IXON |
|
---|
| 399 | PARMRK | IXANY);
|
---|
| 400 | rawattr.c_oflag &= ~(OPOST);
|
---|
| 401 | rawattr.c_lflag &= ~(ECHONL | ECHO | ICANON | IEXTEN | ISIG);
|
---|
| 402 |
|
---|
| 403 | (void)signal(SIGINT, SIG_IGN);
|
---|
| 404 | setsignal(SIGHUP, exit);
|
---|
| 405 | setsignal(SIGQUIT, exit);
|
---|
| 406 |
|
---|
| 407 | #if !__minix_vmd
|
---|
| 408 | child = fork();
|
---|
| 409 | if (child == -1) {
|
---|
| 410 | (void)fprintf(stderr, "rlogin: fork: %s.\n", strerror(errno));
|
---|
| 411 | done(1);
|
---|
| 412 | }
|
---|
| 413 | if (child == 0) {
|
---|
| 414 | mode(1);
|
---|
| 415 | r = reader();
|
---|
| 416 | if (r == 0) {
|
---|
| 417 | msg("connection closed.");
|
---|
| 418 | exit(0);
|
---|
| 419 | }
|
---|
| 420 | sleep(1);
|
---|
| 421 | msg("\007connection closed.");
|
---|
| 422 | exit(1);
|
---|
| 423 | }
|
---|
| 424 |
|
---|
| 425 | (void)signal(SIGCHLD, catch_child);
|
---|
| 426 | writer();
|
---|
| 427 |
|
---|
| 428 | #else /* __minix_vmd */
|
---|
| 429 |
|
---|
| 430 | mode(1);
|
---|
| 431 | /* mark the file descriptors 0, 1, and rem as asynchronous. */
|
---|
| 432 | mark_async(0);
|
---|
| 433 | mark_async(1);
|
---|
| 434 | mark_async(rem);
|
---|
| 435 | init_0();
|
---|
| 436 | init_1();
|
---|
| 437 | init_rd_rem();
|
---|
| 438 | init_wr_rem();
|
---|
| 439 |
|
---|
| 440 | for (;;)
|
---|
| 441 | {
|
---|
| 442 | ASIO_FD_ZERO(&fd_set);
|
---|
| 443 | fw.fw_flags= 0;
|
---|
| 444 | fw.fw_bits= fd_set.afds_bits;
|
---|
| 445 | fw.fw_maxfd= ASIO_FD_SETSIZE;
|
---|
| 446 |
|
---|
| 447 | if (more2read_0 && !inprogress_0)
|
---|
| 448 | {
|
---|
| 449 | restart_0();
|
---|
| 450 | fw.fw_flags |= FWF_NONBLOCK;
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 | if (more2write_1 && !inprogress_1)
|
---|
| 454 | {
|
---|
| 455 | restart_1();
|
---|
| 456 | fw.fw_flags |= FWF_NONBLOCK;
|
---|
| 457 | }
|
---|
| 458 |
|
---|
| 459 | if (more2read_rem && !inprogress_rd_rem)
|
---|
| 460 | {
|
---|
| 461 | restart_rd_rem();
|
---|
| 462 | fw.fw_flags |= FWF_NONBLOCK;
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | if (more2write_rem && !inprogress_wr_rem)
|
---|
| 466 | {
|
---|
| 467 | restart_wr_rem();
|
---|
| 468 | fw.fw_flags |= FWF_NONBLOCK;
|
---|
| 469 | }
|
---|
| 470 |
|
---|
| 471 | if (more2read_0 && inprogress_0)
|
---|
| 472 | ASIO_FD_SET(0, ASIO_READ, &fd_set);
|
---|
| 473 | if (more2write_1 && inprogress_1)
|
---|
| 474 | ASIO_FD_SET(1, ASIO_WRITE, &fd_set);
|
---|
| 475 | if (more2read_rem && inprogress_rd_rem)
|
---|
| 476 | ASIO_FD_SET(rem, ASIO_READ, &fd_set);
|
---|
| 477 | if (more2write_rem && inprogress_wr_rem)
|
---|
| 478 | ASIO_FD_SET(rem, ASIO_WRITE, &fd_set);
|
---|
| 479 |
|
---|
| 480 | for (;;)
|
---|
| 481 | {
|
---|
| 482 | result= fwait(&fw);
|
---|
| 483 | if (result == -1 && (errno == EAGAIN ||
|
---|
| 484 | errno == EINTR))
|
---|
| 485 | {
|
---|
| 486 | break;
|
---|
| 487 | }
|
---|
| 488 | if (result == -1)
|
---|
| 489 | {
|
---|
| 490 | fprintf(stderr, "fwait failed (%s)\n",
|
---|
| 491 | strerror(errno));
|
---|
| 492 | exit(1);
|
---|
| 493 | }
|
---|
| 494 | assert(result == 0);
|
---|
| 495 | #if 0
|
---|
| 496 | printf("fwait: fw_fw= %d, fw_operation= %d, fw_result= %d, fw.fw_errno= %d\n",
|
---|
| 497 | fw.fw_fd, fw.fw_operation, fw.fw_result, fw.fw_errno);
|
---|
| 498 | #endif
|
---|
| 499 | if (fw.fw_fd == 0 && fw.fw_operation == ASIO_READ)
|
---|
| 500 | {
|
---|
| 501 | completed_0(fw.fw_result, fw.fw_errno);
|
---|
| 502 | }
|
---|
| 503 | else if (fw.fw_fd == 1 &&
|
---|
| 504 | fw.fw_operation == ASIO_WRITE)
|
---|
| 505 | {
|
---|
| 506 | completed_1(fw.fw_result, fw.fw_errno);
|
---|
| 507 | }
|
---|
| 508 | else if (fw.fw_fd == rem &&
|
---|
| 509 | fw.fw_operation == ASIO_READ)
|
---|
| 510 | {
|
---|
| 511 | completed_rd_rem(fw.fw_result, fw.fw_errno);
|
---|
| 512 | }
|
---|
| 513 | else if (fw.fw_fd == rem &&
|
---|
| 514 | fw.fw_operation == ASIO_WRITE)
|
---|
| 515 | {
|
---|
| 516 | completed_wr_rem(fw.fw_result, fw.fw_errno);
|
---|
| 517 | }
|
---|
| 518 | else
|
---|
| 519 | {
|
---|
| 520 | fprintf(stderr,
|
---|
| 521 | "strange result from fwait: fd= %d, operation= %d\n",
|
---|
| 522 | fw.fw_fd, fw.fw_operation);
|
---|
| 523 | exit(1);
|
---|
| 524 | }
|
---|
| 525 | if (!(fw.fw_flags & FWF_MORE))
|
---|
| 526 | break;
|
---|
| 527 | }
|
---|
| 528 | if (mustsendwindow)
|
---|
| 529 | {
|
---|
| 530 | mustsendwindow= 0;
|
---|
| 531 | sendwindow();
|
---|
| 532 | }
|
---|
| 533 | }
|
---|
| 534 | #endif /* __minix_vmd */
|
---|
| 535 | msg("connection closed.");
|
---|
| 536 | done(0);
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | /* trap a signal, unless it is being ignored. */
|
---|
| 540 | static void
|
---|
| 541 | setsignal(sig, act)
|
---|
| 542 | int sig;
|
---|
| 543 | void (*act) _ARGS(( int sig ));
|
---|
| 544 | {
|
---|
| 545 | if (signal(sig, act) == SIG_IGN)
|
---|
| 546 | (void)signal(sig, SIG_IGN);
|
---|
| 547 | }
|
---|
| 548 |
|
---|
| 549 | static void
|
---|
| 550 | done(status)
|
---|
| 551 | int status;
|
---|
| 552 | {
|
---|
| 553 | int w, wstatus;
|
---|
| 554 |
|
---|
| 555 | mode(0);
|
---|
| 556 | #if !__minix_vmd
|
---|
| 557 | if (child > 0) {
|
---|
| 558 | /* make sure catch_child does not snap it up */
|
---|
| 559 | (void)signal(SIGCHLD, SIG_DFL);
|
---|
| 560 | if (kill(child, SIGKILL) >= 0)
|
---|
| 561 | while ((w = wait(&wstatus)) > 0 && w != child);
|
---|
| 562 | }
|
---|
| 563 | #endif
|
---|
| 564 | exit(status);
|
---|
| 565 | }
|
---|
| 566 |
|
---|
| 567 | int dosigwinch;
|
---|
| 568 | #if !__minix
|
---|
| 569 | void sigwinch();
|
---|
| 570 | #endif
|
---|
| 571 |
|
---|
| 572 | #if !__minix_vmd
|
---|
| 573 | static void
|
---|
| 574 | catch_child(sig)
|
---|
| 575 | int sig;
|
---|
| 576 | {
|
---|
| 577 | int status;
|
---|
| 578 | int pid;
|
---|
| 579 |
|
---|
| 580 | for (;;) {
|
---|
| 581 | pid = waitpid(-1, &status, WNOHANG|WUNTRACED);
|
---|
| 582 | if (pid == 0)
|
---|
| 583 | return;
|
---|
| 584 | /* if the child (reader) dies, just quit */
|
---|
| 585 | if (pid < 0 || pid == child && !WIFSTOPPED(status))
|
---|
| 586 | done(WTERMSIG(status) | WEXITSTATUS(status));
|
---|
| 587 | }
|
---|
| 588 | /* NOTREACHED */
|
---|
| 589 | }
|
---|
| 590 | #endif
|
---|
| 591 |
|
---|
| 592 | #if !__minix_vmd
|
---|
| 593 | /*
|
---|
| 594 | * writer: write to remote: 0 -> line.
|
---|
| 595 | * ~. terminate
|
---|
| 596 | * ~^Z suspend rlogin process.
|
---|
| 597 | * ~<delayed-suspend char> suspend rlogin process, but leave reader alone.
|
---|
| 598 | */
|
---|
| 599 | static void
|
---|
| 600 | writer()
|
---|
| 601 | {
|
---|
| 602 | register int bol, local, n;
|
---|
| 603 | u_char ch;
|
---|
| 604 | int c;
|
---|
| 605 |
|
---|
| 606 | bol = 1; /* beginning of line */
|
---|
| 607 | local = 0;
|
---|
| 608 | for (;;) {
|
---|
| 609 | n = read(STDIN_FILENO, &ch, 1);
|
---|
| 610 | if (n <= 0) {
|
---|
| 611 | if (n < 0 && errno == EINTR)
|
---|
| 612 | continue;
|
---|
| 613 | break;
|
---|
| 614 | }
|
---|
| 615 | c = ch;
|
---|
| 616 | /*
|
---|
| 617 | * If we're at the beginning of the line and recognize a
|
---|
| 618 | * command character, then we echo locally. Otherwise,
|
---|
| 619 | * characters are echo'd remotely. If the command character
|
---|
| 620 | * is doubled, this acts as a force and local echo is
|
---|
| 621 | * suppressed.
|
---|
| 622 | */
|
---|
| 623 | if (bol) {
|
---|
| 624 | bol = 0;
|
---|
| 625 | if (!noescape && c == escapechar) {
|
---|
| 626 | local = 1;
|
---|
| 627 | continue;
|
---|
| 628 | }
|
---|
| 629 | } else if (local) {
|
---|
| 630 | local = 0;
|
---|
| 631 | if (c == '.' || c == defattr.c_cc[VEOF]) {
|
---|
| 632 | echo(c);
|
---|
| 633 | break;
|
---|
| 634 | }
|
---|
| 635 | #if !__minix
|
---|
| 636 | if (c == defattr.c_cc[VSUSP]) {
|
---|
| 637 | bol = 1;
|
---|
| 638 | echo(c);
|
---|
| 639 | stop(c);
|
---|
| 640 | continue;
|
---|
| 641 | }
|
---|
| 642 | #endif
|
---|
| 643 | if (c != escapechar)
|
---|
| 644 | #ifdef CRYPT
|
---|
| 645 | #ifdef KERBEROS
|
---|
| 646 | if (doencrypt)
|
---|
| 647 | (void)des_write(rem, &escapechar, 1);
|
---|
| 648 | else
|
---|
| 649 | #endif
|
---|
| 650 | #endif
|
---|
| 651 | (void)write(rem, &escapechar, 1);
|
---|
| 652 | }
|
---|
| 653 |
|
---|
| 654 | ch = c;
|
---|
| 655 | #ifdef CRYPT
|
---|
| 656 | #ifdef KERBEROS
|
---|
| 657 | if (doencrypt) {
|
---|
| 658 | if (des_write(rem, &ch, 1) == 0) {
|
---|
| 659 | msg("line gone");
|
---|
| 660 | break;
|
---|
| 661 | }
|
---|
| 662 | } else
|
---|
| 663 | #endif
|
---|
| 664 | #endif
|
---|
| 665 | if (write(rem, &ch, 1) == 0) {
|
---|
| 666 | msg("line gone");
|
---|
| 667 | break;
|
---|
| 668 | }
|
---|
| 669 | bol = c == defattr.c_cc[VKILL] ||
|
---|
| 670 | c == defattr.c_cc[VEOF] ||
|
---|
| 671 | c == defattr.c_cc[VINTR] ||
|
---|
| 672 | c == defattr.c_cc[VSUSP] ||
|
---|
| 673 | c == '\r' || c == '\n';
|
---|
| 674 | }
|
---|
| 675 | }
|
---|
| 676 | #endif
|
---|
| 677 |
|
---|
| 678 | #if !__minix_vmd
|
---|
| 679 | static void
|
---|
| 680 | echo(c)
|
---|
| 681 | int c;
|
---|
| 682 | {
|
---|
| 683 | register char *p;
|
---|
| 684 | char buf[8];
|
---|
| 685 |
|
---|
| 686 | p = buf;
|
---|
| 687 | c &= 0177;
|
---|
| 688 | *p++ = escapechar;
|
---|
| 689 | if (c < ' ') {
|
---|
| 690 | *p++ = '^';
|
---|
| 691 | *p++ = c + '@';
|
---|
| 692 | } else if (c == 0177) {
|
---|
| 693 | *p++ = '^';
|
---|
| 694 | *p++ = '?';
|
---|
| 695 | } else
|
---|
| 696 | *p++ = c;
|
---|
| 697 | *p++ = '\r';
|
---|
| 698 | *p++ = '\n';
|
---|
| 699 | (void)write(STDOUT_FILENO, buf, p - buf);
|
---|
| 700 | }
|
---|
| 701 | #endif
|
---|
| 702 |
|
---|
| 703 | #if !__minix
|
---|
| 704 | stop(cmdc)
|
---|
| 705 | char cmdc;
|
---|
| 706 | {
|
---|
| 707 | mode(0);
|
---|
| 708 | (void)signal(SIGCHLD, SIG_IGN);
|
---|
| 709 | (void)kill(cmdc == defltc.t_suspc ? 0 : getpid(), SIGTSTP);
|
---|
| 710 | (void)signal(SIGCHLD, catch_child);
|
---|
| 711 | mode(1);
|
---|
| 712 | sigwinch(); /* check for size changes */
|
---|
| 713 | }
|
---|
| 714 | #endif
|
---|
| 715 |
|
---|
| 716 | #if __minix_vmd
|
---|
| 717 | #ifdef SIGWINCH
|
---|
| 718 | static void
|
---|
| 719 | sigwinch(sig)
|
---|
| 720 | int sig;
|
---|
| 721 | {
|
---|
| 722 | struct winsize ws;
|
---|
| 723 |
|
---|
| 724 | #if __minix
|
---|
| 725 | signal(SIGWINCH, sigwinch);
|
---|
| 726 | #endif
|
---|
| 727 |
|
---|
| 728 | if (dosigwinch && get_window_size(0, &ws) == 0 &&
|
---|
| 729 | memcmp(&ws, &winsize, sizeof(ws))) {
|
---|
| 730 | winsize = ws;
|
---|
| 731 | mustsendwindow= 1;
|
---|
| 732 | }
|
---|
| 733 | }
|
---|
| 734 |
|
---|
| 735 | /*
|
---|
| 736 | * Send the window size to the server via the magic escape
|
---|
| 737 | */
|
---|
| 738 | static void
|
---|
| 739 | sendwindow()
|
---|
| 740 | {
|
---|
| 741 | struct winsize *wp;
|
---|
| 742 | char *obuf, *new_buf;
|
---|
| 743 |
|
---|
| 744 | new_buf= realloc(extra_wr_rem_new,
|
---|
| 745 | extra_wr_rem_new_size+4+sizeof(*wp));
|
---|
| 746 | if (new_buf == 0)
|
---|
| 747 | return;
|
---|
| 748 | extra_wr_rem_new= new_buf;
|
---|
| 749 | obuf= new_buf+extra_wr_rem_new_size;
|
---|
| 750 | extra_wr_rem_new_size += 4+sizeof(*wp);
|
---|
| 751 |
|
---|
| 752 | more2read_0= 0;
|
---|
| 753 | more2write_rem= 1;
|
---|
| 754 |
|
---|
| 755 | wp = (struct winsize *)(obuf+4);
|
---|
| 756 | obuf[0] = 0377;
|
---|
| 757 | obuf[1] = 0377;
|
---|
| 758 | obuf[2] = 's';
|
---|
| 759 | obuf[3] = 's';
|
---|
| 760 | wp->ws_row = htons(winsize.ws_row);
|
---|
| 761 | wp->ws_col = htons(winsize.ws_col);
|
---|
| 762 | wp->ws_xpixel = htons(winsize.ws_xpixel);
|
---|
| 763 | wp->ws_ypixel = htons(winsize.ws_ypixel);
|
---|
| 764 | }
|
---|
| 765 | #endif /* SIGWINCH */
|
---|
| 766 | #endif
|
---|
| 767 |
|
---|
| 768 | #if !__minix_vmd
|
---|
| 769 | /*
|
---|
| 770 | * reader: read from remote: line -> 1
|
---|
| 771 | */
|
---|
| 772 | #define READING 1
|
---|
| 773 | #define WRITING 2
|
---|
| 774 |
|
---|
| 775 | int rcvcnt, rcvstate;
|
---|
| 776 | char rcvbuf[8 * 1024];
|
---|
| 777 |
|
---|
| 778 | static int
|
---|
| 779 | reader()
|
---|
| 780 | {
|
---|
| 781 | int pid = -getpid();
|
---|
| 782 | int n, remaining;
|
---|
| 783 | char *bufp = rcvbuf;
|
---|
| 784 |
|
---|
| 785 | for (;;) {
|
---|
| 786 | while ((remaining = rcvcnt - (bufp - rcvbuf)) > 0) {
|
---|
| 787 | rcvstate = WRITING;
|
---|
| 788 | n = write(STDOUT_FILENO, bufp, remaining);
|
---|
| 789 | if (n < 0) {
|
---|
| 790 | if (errno != EINTR)
|
---|
| 791 | return(-1);
|
---|
| 792 | continue;
|
---|
| 793 | }
|
---|
| 794 | bufp += n;
|
---|
| 795 | }
|
---|
| 796 | bufp = rcvbuf;
|
---|
| 797 | rcvcnt = 0;
|
---|
| 798 | rcvstate = READING;
|
---|
| 799 |
|
---|
| 800 | #ifdef CRYPT
|
---|
| 801 | #ifdef KERBEROS
|
---|
| 802 | if (doencrypt)
|
---|
| 803 | rcvcnt = des_read(rem, rcvbuf, sizeof(rcvbuf));
|
---|
| 804 | else
|
---|
| 805 | #endif
|
---|
| 806 | #endif
|
---|
| 807 | rcvcnt = read(rem, rcvbuf, sizeof (rcvbuf));
|
---|
| 808 | if (rcvcnt == 0)
|
---|
| 809 | return (0);
|
---|
| 810 | if (rcvcnt < 0) {
|
---|
| 811 | if (errno == EINTR)
|
---|
| 812 | continue;
|
---|
| 813 | if (errno == EURG) {
|
---|
| 814 | nwio_tcpopt_t tcpopt;
|
---|
| 815 | #if DEBUG
|
---|
| 816 | fprintf(stderr, "\n\rEURG\n\r");
|
---|
| 817 | #endif
|
---|
| 818 | tcpopt.nwto_flags= NWTO_RCV_URG;
|
---|
| 819 | if (ioctl(rem, NWIOSTCPOPT, &tcpopt) == -1) {
|
---|
| 820 | fprintf(stderr,
|
---|
| 821 | "rlogin: trouble with urgent data: %s\n",
|
---|
| 822 | strerror(errno));
|
---|
| 823 | return(-1);
|
---|
| 824 | }
|
---|
| 825 | continue;
|
---|
| 826 | }
|
---|
| 827 | if (errno == ENOURG) {
|
---|
| 828 | nwio_tcpopt_t tcpopt;
|
---|
| 829 | #if DEBUG
|
---|
| 830 | fprintf(stderr, "\n\rENOURG\n\r");
|
---|
| 831 | #endif
|
---|
| 832 | tcpopt.nwto_flags= NWTO_RCV_NOTURG;
|
---|
| 833 | if (ioctl(rem, NWIOSTCPOPT, &tcpopt) == -1) {
|
---|
| 834 | fprintf(stderr,
|
---|
| 835 | "rlogin: trouble with not-urgent data: %s\n",
|
---|
| 836 | strerror(errno));
|
---|
| 837 | return(-1);
|
---|
| 838 | }
|
---|
| 839 | continue;
|
---|
| 840 | }
|
---|
| 841 | (void)fprintf(stderr, "rlogin: read: %s\n",
|
---|
| 842 | strerror(errno));
|
---|
| 843 | return(-1);
|
---|
| 844 | }
|
---|
| 845 | }
|
---|
| 846 | }
|
---|
| 847 | #endif /* !__minix_vmd */
|
---|
| 848 |
|
---|
| 849 | static void
|
---|
| 850 | mode(f)
|
---|
| 851 | int f;
|
---|
| 852 | {
|
---|
| 853 | struct termios *sb;
|
---|
| 854 |
|
---|
| 855 | switch(f) {
|
---|
| 856 | case 0:
|
---|
| 857 | sb= &defattr;
|
---|
| 858 | break;
|
---|
| 859 | case 1:
|
---|
| 860 | sb= &rawattr;
|
---|
| 861 | break;
|
---|
| 862 | default:
|
---|
| 863 | return;
|
---|
| 864 | }
|
---|
| 865 | (void)tcsetattr(0, TCSAFLUSH, sb);
|
---|
| 866 | }
|
---|
| 867 |
|
---|
| 868 | static void
|
---|
| 869 | lostpeer(sig)
|
---|
| 870 | int sig;
|
---|
| 871 | {
|
---|
| 872 | (void)signal(SIGPIPE, SIG_IGN);
|
---|
| 873 | msg("\007connection closed.");
|
---|
| 874 | done(1);
|
---|
| 875 | }
|
---|
| 876 |
|
---|
| 877 | static void
|
---|
| 878 | msg(str)
|
---|
| 879 | char *str;
|
---|
| 880 | {
|
---|
| 881 | (void)fprintf(stderr, "rlogin: %s\r\n", str);
|
---|
| 882 | }
|
---|
| 883 |
|
---|
| 884 | #ifdef KERBEROS
|
---|
| 885 | /* VARARGS */
|
---|
| 886 | warning(va_alist)
|
---|
| 887 | va_dcl
|
---|
| 888 | {
|
---|
| 889 | va_list ap;
|
---|
| 890 | char *fmt;
|
---|
| 891 |
|
---|
| 892 | (void)fprintf(stderr, "rlogin: warning, using standard rlogin: ");
|
---|
| 893 | va_start(ap);
|
---|
| 894 | fmt = va_arg(ap, char *);
|
---|
| 895 | vfprintf(stderr, fmt, ap);
|
---|
| 896 | va_end(ap);
|
---|
| 897 | (void)fprintf(stderr, ".\n");
|
---|
| 898 | }
|
---|
| 899 | #endif
|
---|
| 900 |
|
---|
| 901 | static void
|
---|
| 902 | usage()
|
---|
| 903 | {
|
---|
| 904 | (void)fprintf(stderr,
|
---|
| 905 | "Usage: rlogin [-%s]%s[-e char] [-l username] host\n",
|
---|
| 906 | #ifdef KERBEROS
|
---|
| 907 | #ifdef CRYPT
|
---|
| 908 | "8ELx", " [-k realm] ");
|
---|
| 909 | #else
|
---|
| 910 | "8EL", " [-k realm] ");
|
---|
| 911 | #endif
|
---|
| 912 | #else
|
---|
| 913 | "8EL", " ");
|
---|
| 914 | #endif
|
---|
| 915 | exit(1);
|
---|
| 916 | }
|
---|
| 917 |
|
---|
| 918 | /*
|
---|
| 919 | * The following routine provides compatibility (such as it is) between 4.2BSD
|
---|
| 920 | * Suns and others. Suns have only a `ttysize', so we convert it to a winsize.
|
---|
| 921 | */
|
---|
| 922 | #ifdef sun
|
---|
| 923 | get_window_size(fd, wp)
|
---|
| 924 | int fd;
|
---|
| 925 | struct winsize *wp;
|
---|
| 926 | {
|
---|
| 927 | struct ttysize ts;
|
---|
| 928 | int error;
|
---|
| 929 |
|
---|
| 930 | if ((error = ioctl(0, TIOCGSIZE, &ts)) != 0)
|
---|
| 931 | return(error);
|
---|
| 932 | wp->ws_row = ts.ts_lines;
|
---|
| 933 | wp->ws_col = ts.ts_cols;
|
---|
| 934 | wp->ws_xpixel = 0;
|
---|
| 935 | wp->ws_ypixel = 0;
|
---|
| 936 | return(0);
|
---|
| 937 | }
|
---|
| 938 | #endif
|
---|
| 939 |
|
---|
| 940 | static u_char
|
---|
| 941 | getescape(p)
|
---|
| 942 | register char *p;
|
---|
| 943 | {
|
---|
| 944 | long val;
|
---|
| 945 | int len;
|
---|
| 946 |
|
---|
| 947 | if ((len = strlen(p)) == 1) /* use any single char, including '\' */
|
---|
| 948 | return((u_char)*p);
|
---|
| 949 | /* otherwise, \nnn */
|
---|
| 950 | if (*p == '\\' && len >= 2 && len <= 4) {
|
---|
| 951 | val = strtol(++p, (char **)NULL, 8);
|
---|
| 952 | for (;;) {
|
---|
| 953 | if (!*++p)
|
---|
| 954 | return((u_char)val);
|
---|
| 955 | if (*p < '0' || *p > '8')
|
---|
| 956 | break;
|
---|
| 957 | }
|
---|
| 958 | }
|
---|
| 959 | msg("illegal option value -- e");
|
---|
| 960 | usage();
|
---|
| 961 | /* NOTREACHED */
|
---|
| 962 | }
|
---|
| 963 |
|
---|
| 964 | static char *
|
---|
| 965 | speeds2str(speed)
|
---|
| 966 | speed_t speed;
|
---|
| 967 | {
|
---|
| 968 | int i;
|
---|
| 969 | for (i= 0; speeds[i].name != NULL && speeds[i].speed != speed; i++) {
|
---|
| 970 | if (speeds[i].speed == speed) return speeds[i].name;
|
---|
| 971 | }
|
---|
| 972 | return "unknown";
|
---|
| 973 | }
|
---|
| 974 |
|
---|
| 975 | #if __minix_vmd
|
---|
| 976 | static void
|
---|
| 977 | mark_async(fd)
|
---|
| 978 | int fd;
|
---|
| 979 | {
|
---|
| 980 | int result;
|
---|
| 981 | int v;
|
---|
| 982 |
|
---|
| 983 | result= fcntl(fd, F_GETFD);
|
---|
| 984 | if (result == -1)
|
---|
| 985 | {
|
---|
| 986 | fprintf(stderr,
|
---|
| 987 | "rlogin: mark_async: fcntl(%d, GETFD) failed (%s)\n",
|
---|
| 988 | fd, strerror(errno));
|
---|
| 989 | exit(1);
|
---|
| 990 | }
|
---|
| 991 | v= result | FD_ASYNCHIO;
|
---|
| 992 | result= fcntl(fd, F_SETFD, v);
|
---|
| 993 | if (result == -1)
|
---|
| 994 | {
|
---|
| 995 | fprintf(stderr,
|
---|
| 996 | "rlogin: mark_async: fcntl(%d, SETFD, %d) failed (%s)\n",
|
---|
| 997 | fd, v, strerror(errno));
|
---|
| 998 | exit(1);
|
---|
| 999 | }
|
---|
| 1000 | }
|
---|
| 1001 |
|
---|
| 1002 | #define RD_0_BUFSIZE 256
|
---|
| 1003 | char rd_0_buf[RD_0_BUFSIZE];
|
---|
| 1004 | size_t rd_0_offset;
|
---|
| 1005 |
|
---|
| 1006 | static void
|
---|
| 1007 | init_0()
|
---|
| 1008 | {
|
---|
| 1009 | more2read_0= 1;
|
---|
| 1010 | inprogress_0= 0;
|
---|
| 1011 | rd_0_offset= 0;
|
---|
| 1012 | }
|
---|
| 1013 |
|
---|
| 1014 | size_t wr_1_size;
|
---|
| 1015 | size_t wr_1_offset;
|
---|
| 1016 | char *urg_1;
|
---|
| 1017 | size_t urg_1_size;
|
---|
| 1018 | char *extra_1;
|
---|
| 1019 | size_t extra_1_size;
|
---|
| 1020 | size_t extra_1_offset;
|
---|
| 1021 | char *extra_1_new;
|
---|
| 1022 | size_t extra_1_new_size;
|
---|
| 1023 | #define MAX_EXTRA_1_NEW_SIZE (16*1024)
|
---|
| 1024 |
|
---|
| 1025 | static void
|
---|
| 1026 | init_1()
|
---|
| 1027 | {
|
---|
| 1028 | more2write_1= 0;
|
---|
| 1029 | inprogress_1= 0;
|
---|
| 1030 | wr_1_size= 0;
|
---|
| 1031 | wr_1_offset= 0;
|
---|
| 1032 | urg_1= NULL;
|
---|
| 1033 | urg_1_size= 0;
|
---|
| 1034 | extra_1= NULL;
|
---|
| 1035 | extra_1_size= 0;
|
---|
| 1036 | extra_1_offset= 0;
|
---|
| 1037 | extra_1_new= NULL;
|
---|
| 1038 | extra_1_new_size= 0;
|
---|
| 1039 | }
|
---|
| 1040 |
|
---|
| 1041 | #define RD_REM_BUFSIZE (8*1024)
|
---|
| 1042 | char rd_rem_buf[RD_REM_BUFSIZE];
|
---|
| 1043 | size_t rd_rem_offset;
|
---|
| 1044 | int rd_rem_urg;
|
---|
| 1045 |
|
---|
| 1046 | static void
|
---|
| 1047 | init_rd_rem()
|
---|
| 1048 | {
|
---|
| 1049 | more2read_rem= 1;
|
---|
| 1050 | inprogress_rd_rem= 0;
|
---|
| 1051 | rd_rem_offset= 0;
|
---|
| 1052 | rd_rem_urg= 0;
|
---|
| 1053 | }
|
---|
| 1054 |
|
---|
| 1055 | static void
|
---|
| 1056 | init_wr_rem()
|
---|
| 1057 | {
|
---|
| 1058 | more2write_rem= 0;
|
---|
| 1059 | inprogress_wr_rem= 0;
|
---|
| 1060 | wr_rem_size= 0;
|
---|
| 1061 | wr_rem_offset= 0;
|
---|
| 1062 | extra_wr_rem_size= 0;
|
---|
| 1063 | extra_wr_rem_offset= 0;
|
---|
| 1064 | extra_wr_rem= NULL;
|
---|
| 1065 | extra_wr_rem_new_size= 0;
|
---|
| 1066 | extra_wr_rem_new= NULL;
|
---|
| 1067 | }
|
---|
| 1068 |
|
---|
| 1069 | static void
|
---|
| 1070 | restart_0()
|
---|
| 1071 | {
|
---|
| 1072 | size_t offset;
|
---|
| 1073 | int result, error;
|
---|
| 1074 |
|
---|
| 1075 | assert(!inprogress_0);
|
---|
| 1076 | rd_0_offset= 1;
|
---|
| 1077 | offset= 0;
|
---|
| 1078 | while (offset < RD_0_BUFSIZE)
|
---|
| 1079 | {
|
---|
| 1080 | result= read(0, rd_0_buf+rd_0_offset+offset,
|
---|
| 1081 | RD_0_BUFSIZE-rd_0_offset-offset);
|
---|
| 1082 | if (result > 0)
|
---|
| 1083 | {
|
---|
| 1084 | offset += result;
|
---|
| 1085 | assert(rd_0_offset+offset <= RD_0_BUFSIZE);
|
---|
| 1086 | continue;
|
---|
| 1087 | }
|
---|
| 1088 | error= errno;
|
---|
| 1089 |
|
---|
| 1090 | if (offset != 0)
|
---|
| 1091 | completed_0(offset, 0);
|
---|
| 1092 | rd_0_offset += offset;
|
---|
| 1093 | if (result == -1 && error == EINPROGRESS)
|
---|
| 1094 | {
|
---|
| 1095 | inprogress_0= 1;
|
---|
| 1096 | return;
|
---|
| 1097 | }
|
---|
| 1098 | completed_0(result, error);
|
---|
| 1099 | return;
|
---|
| 1100 | }
|
---|
| 1101 | completed_0(offset, 0);
|
---|
| 1102 | }
|
---|
| 1103 |
|
---|
| 1104 | static void
|
---|
| 1105 | restart_1()
|
---|
| 1106 | {
|
---|
| 1107 | size_t offset;
|
---|
| 1108 | int result, error;
|
---|
| 1109 |
|
---|
| 1110 | assert(!inprogress_1);
|
---|
| 1111 |
|
---|
| 1112 | while (extra_1 != NULL || extra_1_new != NULL)
|
---|
| 1113 | {
|
---|
| 1114 | if (extra_1 == NULL)
|
---|
| 1115 | {
|
---|
| 1116 | extra_1= extra_1_new;
|
---|
| 1117 | extra_1_new= NULL;
|
---|
| 1118 | extra_1_size= extra_1_new_size;
|
---|
| 1119 | extra_1_new_size= 0;
|
---|
| 1120 | extra_1_offset= 0;
|
---|
| 1121 | }
|
---|
| 1122 | offset= 0;
|
---|
| 1123 | #if DEBUG
|
---|
| 1124 | if (extra_1_size == 0)
|
---|
| 1125 | fprintf(stderr, "restart_1: extra_1_size= 0\n");
|
---|
| 1126 | #endif
|
---|
| 1127 | while (offset < extra_1_size)
|
---|
| 1128 | {
|
---|
| 1129 | result= write(1, extra_1+extra_1_offset+offset,
|
---|
| 1130 | extra_1_size-offset);
|
---|
| 1131 | if (result > 0)
|
---|
| 1132 | {
|
---|
| 1133 | assert (result <= extra_1_size-offset);
|
---|
| 1134 | offset += result;
|
---|
| 1135 | continue;
|
---|
| 1136 | }
|
---|
| 1137 | error= errno;
|
---|
| 1138 | if (offset != 0)
|
---|
| 1139 | completed_1(offset, 0);
|
---|
| 1140 |
|
---|
| 1141 | if (result == -1 && errno == EINPROGRESS)
|
---|
| 1142 | {
|
---|
| 1143 | inprogress_1= 1;
|
---|
| 1144 | return;
|
---|
| 1145 | }
|
---|
| 1146 | completed_1(result, errno);
|
---|
| 1147 | return;
|
---|
| 1148 | }
|
---|
| 1149 | completed_1(offset, 0);
|
---|
| 1150 | }
|
---|
| 1151 |
|
---|
| 1152 | offset= 0;
|
---|
| 1153 |
|
---|
| 1154 | if (wr_1_size == 0)
|
---|
| 1155 | {
|
---|
| 1156 | more2write_1= 0;
|
---|
| 1157 | more2read_rem= 1;
|
---|
| 1158 | return;
|
---|
| 1159 | }
|
---|
| 1160 |
|
---|
| 1161 | while (offset < wr_1_size)
|
---|
| 1162 | {
|
---|
| 1163 | result= write(1, rd_rem_buf+wr_1_offset+offset,
|
---|
| 1164 | wr_1_size-offset);
|
---|
| 1165 | if (result > 0)
|
---|
| 1166 | {
|
---|
| 1167 | assert (result <= wr_1_size-offset);
|
---|
| 1168 | offset += result;
|
---|
| 1169 | continue;
|
---|
| 1170 | }
|
---|
| 1171 | error= errno;
|
---|
| 1172 | if (offset != 0)
|
---|
| 1173 | completed_1(offset, 0);
|
---|
| 1174 |
|
---|
| 1175 | if (result == -1 && errno == EINPROGRESS)
|
---|
| 1176 | {
|
---|
| 1177 | inprogress_1= 1;
|
---|
| 1178 | return;
|
---|
| 1179 | }
|
---|
| 1180 | completed_1(result, errno);
|
---|
| 1181 | return;
|
---|
| 1182 | }
|
---|
| 1183 | completed_1(offset, 0);
|
---|
| 1184 | }
|
---|
| 1185 |
|
---|
| 1186 | static void
|
---|
| 1187 | restart_rd_rem()
|
---|
| 1188 | {
|
---|
| 1189 | size_t offset;
|
---|
| 1190 | int result, error;
|
---|
| 1191 |
|
---|
| 1192 | assert(!inprogress_rd_rem);
|
---|
| 1193 | rd_rem_offset= 0;
|
---|
| 1194 | offset= 0;
|
---|
| 1195 | while (offset < RD_REM_BUFSIZE)
|
---|
| 1196 | {
|
---|
| 1197 | result= read(rem, rd_rem_buf+offset, RD_REM_BUFSIZE-offset);
|
---|
| 1198 | if (result > 0)
|
---|
| 1199 | {
|
---|
| 1200 | offset += result;
|
---|
| 1201 | assert(offset <= RD_REM_BUFSIZE);
|
---|
| 1202 | continue;
|
---|
| 1203 | }
|
---|
| 1204 | error= errno;
|
---|
| 1205 |
|
---|
| 1206 | if (offset != 0)
|
---|
| 1207 | completed_rd_rem(offset, 0);
|
---|
| 1208 | rd_rem_offset= offset;
|
---|
| 1209 | if (result == -1 && error == EINPROGRESS)
|
---|
| 1210 | {
|
---|
| 1211 | inprogress_rd_rem= 1;
|
---|
| 1212 | return;
|
---|
| 1213 | }
|
---|
| 1214 | completed_rd_rem(result, error);
|
---|
| 1215 | return;
|
---|
| 1216 | }
|
---|
| 1217 | completed_rd_rem(offset, 0);
|
---|
| 1218 | }
|
---|
| 1219 |
|
---|
| 1220 | static void
|
---|
| 1221 | restart_wr_rem()
|
---|
| 1222 | {
|
---|
| 1223 | size_t offset;
|
---|
| 1224 | int result, error;
|
---|
| 1225 |
|
---|
| 1226 | assert(!inprogress_wr_rem);
|
---|
| 1227 |
|
---|
| 1228 | if (extra_wr_rem_new != NULL && extra_wr_rem == NULL)
|
---|
| 1229 | {
|
---|
| 1230 | extra_wr_rem= extra_wr_rem_new;
|
---|
| 1231 | extra_wr_rem_size= extra_wr_rem_new_size;
|
---|
| 1232 | extra_wr_rem_offset= 0;
|
---|
| 1233 | extra_wr_rem_new= NULL;
|
---|
| 1234 | extra_wr_rem_new_size= 0;
|
---|
| 1235 | }
|
---|
| 1236 | if (extra_wr_rem != NULL)
|
---|
| 1237 | {
|
---|
| 1238 | offset= 0;
|
---|
| 1239 | while (offset < extra_wr_rem_size)
|
---|
| 1240 | {
|
---|
| 1241 | result= write(rem,
|
---|
| 1242 | extra_wr_rem+extra_wr_rem_offset+offset,
|
---|
| 1243 | extra_wr_rem_size-offset);
|
---|
| 1244 | if (result > 0)
|
---|
| 1245 | {
|
---|
| 1246 | assert (result <= extra_wr_rem_size-offset);
|
---|
| 1247 | offset += result;
|
---|
| 1248 | continue;
|
---|
| 1249 | }
|
---|
| 1250 | error= errno;
|
---|
| 1251 | if (offset != 0)
|
---|
| 1252 | completed_wr_rem(offset, 0);
|
---|
| 1253 |
|
---|
| 1254 | if (result == -1 && errno == EINPROGRESS)
|
---|
| 1255 | {
|
---|
| 1256 | inprogress_wr_rem= 1;
|
---|
| 1257 | return;
|
---|
| 1258 | }
|
---|
| 1259 | completed_wr_rem(result, errno);
|
---|
| 1260 | return;
|
---|
| 1261 | }
|
---|
| 1262 | completed_wr_rem(offset, 0);
|
---|
| 1263 | }
|
---|
| 1264 | if (wr_rem_size == 0)
|
---|
| 1265 | return;
|
---|
| 1266 |
|
---|
| 1267 | offset= 0;
|
---|
| 1268 | while (offset < wr_rem_size)
|
---|
| 1269 | {
|
---|
| 1270 | result= write(rem, rd_0_buf+wr_rem_offset+offset,
|
---|
| 1271 | wr_rem_size-offset);
|
---|
| 1272 | if (result > 0)
|
---|
| 1273 | {
|
---|
| 1274 | assert (result <= wr_rem_size-offset);
|
---|
| 1275 | offset += result;
|
---|
| 1276 | continue;
|
---|
| 1277 | }
|
---|
| 1278 | error= errno;
|
---|
| 1279 | if (offset != 0)
|
---|
| 1280 | completed_wr_rem(offset, 0);
|
---|
| 1281 |
|
---|
| 1282 | if (result == -1 && errno == EINPROGRESS)
|
---|
| 1283 | {
|
---|
| 1284 | inprogress_wr_rem= 1;
|
---|
| 1285 | return;
|
---|
| 1286 | }
|
---|
| 1287 | completed_wr_rem(result, errno);
|
---|
| 1288 | return;
|
---|
| 1289 | }
|
---|
| 1290 | completed_wr_rem(offset, 0);
|
---|
| 1291 | }
|
---|
| 1292 |
|
---|
| 1293 | static void
|
---|
| 1294 | completed_0(result, error)
|
---|
| 1295 | int result;
|
---|
| 1296 | int error;
|
---|
| 1297 | {
|
---|
| 1298 | static int bol= 0, local= 0;
|
---|
| 1299 |
|
---|
| 1300 | char *iptr, *optr;
|
---|
| 1301 | int i;
|
---|
| 1302 | u_char c;
|
---|
| 1303 |
|
---|
| 1304 | inprogress_0= 0;
|
---|
| 1305 |
|
---|
| 1306 | if (result > 0)
|
---|
| 1307 | {
|
---|
| 1308 | assert(rd_0_offset > 0);
|
---|
| 1309 | wr_rem_offset= 1;
|
---|
| 1310 |
|
---|
| 1311 | iptr= rd_0_buf+rd_0_offset;
|
---|
| 1312 | optr= rd_0_buf+wr_rem_offset;
|
---|
| 1313 | for (i= 0; i<result; iptr++, i++)
|
---|
| 1314 | {
|
---|
| 1315 | c= *iptr;
|
---|
| 1316 | if (bol)
|
---|
| 1317 | {
|
---|
| 1318 | bol= 0;
|
---|
| 1319 | if (!noescape && c == escapechar)
|
---|
| 1320 | {
|
---|
| 1321 | local= 1;
|
---|
| 1322 | continue;
|
---|
| 1323 | }
|
---|
| 1324 | }
|
---|
| 1325 | else if (local)
|
---|
| 1326 | {
|
---|
| 1327 | local= 0;
|
---|
| 1328 | if (c == '.' || (c != _POSIX_VDISABLE &&
|
---|
| 1329 | c == defattr.c_cc[VEOF]))
|
---|
| 1330 | {
|
---|
| 1331 | echo(c);
|
---|
| 1332 | finish();
|
---|
| 1333 | /* NOTREACHED */
|
---|
| 1334 | }
|
---|
| 1335 | if (c == '!')
|
---|
| 1336 | {
|
---|
| 1337 | subshell();
|
---|
| 1338 | continue;
|
---|
| 1339 | }
|
---|
| 1340 | if (c != escapechar)
|
---|
| 1341 | {
|
---|
| 1342 | if (optr < iptr)
|
---|
| 1343 | {
|
---|
| 1344 | *(optr++)= escapechar;
|
---|
| 1345 | }
|
---|
| 1346 | else
|
---|
| 1347 | {
|
---|
| 1348 | assert(optr == iptr);
|
---|
| 1349 | assert(iptr == rd_0_buf+
|
---|
| 1350 | rd_0_offset);
|
---|
| 1351 | assert(rd_0_offset > 0);
|
---|
| 1352 | wr_rem_offset--;
|
---|
| 1353 | optr[-1]= escapechar;
|
---|
| 1354 | }
|
---|
| 1355 | }
|
---|
| 1356 | }
|
---|
| 1357 | *(optr++)= c;
|
---|
| 1358 | bol= (c != _POSIX_VDISABLE) &&
|
---|
| 1359 | (c == defattr.c_cc[VKILL] ||
|
---|
| 1360 | c == defattr.c_cc[VEOF] ||
|
---|
| 1361 | c == defattr.c_cc[VINTR] ||
|
---|
| 1362 | c == defattr.c_cc[VSUSP] ||
|
---|
| 1363 | c == '\r' || c == '\n');
|
---|
| 1364 | }
|
---|
| 1365 | wr_rem_size += optr-rd_0_buf-wr_rem_offset;
|
---|
| 1366 | if (wr_rem_size != 0)
|
---|
| 1367 | {
|
---|
| 1368 | more2read_0= 0;
|
---|
| 1369 | more2write_rem= 1;
|
---|
| 1370 | }
|
---|
| 1371 | return;
|
---|
| 1372 | } else
|
---|
| 1373 | if (result < 0) {
|
---|
| 1374 | fprintf(stderr, "rlogin: %s\n", strerror(error));
|
---|
| 1375 | }
|
---|
| 1376 | done(1);
|
---|
| 1377 | }
|
---|
| 1378 |
|
---|
| 1379 | static void
|
---|
| 1380 | completed_1(result, error)
|
---|
| 1381 | int result;
|
---|
| 1382 | int error;
|
---|
| 1383 | {
|
---|
| 1384 | inprogress_1= 0;
|
---|
| 1385 |
|
---|
| 1386 | if (result > 0)
|
---|
| 1387 | {
|
---|
| 1388 | if (extra_1 != NULL)
|
---|
| 1389 | {
|
---|
| 1390 | assert (result <= extra_1_size);
|
---|
| 1391 | extra_1_size -= result;
|
---|
| 1392 | extra_1_offset += result;
|
---|
| 1393 | if (extra_1_size == 0)
|
---|
| 1394 | {
|
---|
| 1395 | more2write_1= 0;
|
---|
| 1396 | more2read_rem= 1;
|
---|
| 1397 | free(extra_1);
|
---|
| 1398 | extra_1= NULL;
|
---|
| 1399 | }
|
---|
| 1400 | return;
|
---|
| 1401 | }
|
---|
| 1402 | assert (result <= wr_1_size);
|
---|
| 1403 | wr_1_size -= result;
|
---|
| 1404 | wr_1_offset += result;
|
---|
| 1405 | if (wr_1_size == 0)
|
---|
| 1406 | {
|
---|
| 1407 | more2write_1= 0;
|
---|
| 1408 | more2read_rem= 1;
|
---|
| 1409 | }
|
---|
| 1410 | return;
|
---|
| 1411 | } else
|
---|
| 1412 | if (result < 0) {
|
---|
| 1413 | fprintf(stderr, "rlogin: %s\n", strerror(error));
|
---|
| 1414 | }
|
---|
| 1415 | done(1);
|
---|
| 1416 | }
|
---|
| 1417 |
|
---|
| 1418 | static void
|
---|
| 1419 | completed_rd_rem(result, error)
|
---|
| 1420 | int result;
|
---|
| 1421 | int error;
|
---|
| 1422 | {
|
---|
| 1423 | nwio_tcpopt_t tcpopt;
|
---|
| 1424 | char *new_buf;
|
---|
| 1425 | size_t keep_size;
|
---|
| 1426 | u_char urg_byte;
|
---|
| 1427 | int i;
|
---|
| 1428 |
|
---|
| 1429 | inprogress_rd_rem= 0;
|
---|
| 1430 |
|
---|
| 1431 | if (result > 0)
|
---|
| 1432 | {
|
---|
| 1433 | if (rd_rem_urg)
|
---|
| 1434 | {
|
---|
| 1435 | #if DEBUG
|
---|
| 1436 | fprintf(stderr, "\n\r%d urg bytes\n\r", result);
|
---|
| 1437 | #endif
|
---|
| 1438 | if (urg_1_size > MAX_EXTRA_1_NEW_SIZE)
|
---|
| 1439 | {
|
---|
| 1440 | keep_size= MAX_EXTRA_1_NEW_SIZE/2;
|
---|
| 1441 | memmove(urg_1, urg_1+urg_1_size-keep_size,
|
---|
| 1442 | keep_size);
|
---|
| 1443 | urg_1_size= keep_size;
|
---|
| 1444 | }
|
---|
| 1445 | new_buf= realloc(urg_1, urg_1_size+result);
|
---|
| 1446 | if (new_buf == NULL)
|
---|
| 1447 | {
|
---|
| 1448 | fprintf(stderr,
|
---|
| 1449 | "rlogin: warning realloc %d failed\n",
|
---|
| 1450 | urg_1_size+result);
|
---|
| 1451 | return;
|
---|
| 1452 | }
|
---|
| 1453 | memcpy(new_buf+urg_1_size,
|
---|
| 1454 | rd_rem_buf+rd_rem_offset, result);
|
---|
| 1455 | urg_1= new_buf;
|
---|
| 1456 | urg_1_size += result;
|
---|
| 1457 | return;
|
---|
| 1458 | }
|
---|
| 1459 | more2read_rem= 0;
|
---|
| 1460 | more2write_1= 1;
|
---|
| 1461 | wr_1_size= result;
|
---|
| 1462 | wr_1_offset= rd_rem_offset;
|
---|
| 1463 | return;
|
---|
| 1464 | }
|
---|
| 1465 | if (result == -1 && error == EURG)
|
---|
| 1466 | {
|
---|
| 1467 | #if DEBUG
|
---|
| 1468 | fprintf(stderr, "\n\rEURG\n\r");
|
---|
| 1469 | #endif
|
---|
| 1470 | rd_rem_urg= 1;
|
---|
| 1471 | tcpopt.nwto_flags= NWTO_RCV_URG;
|
---|
| 1472 | result= ioctl(rem, NWIOSTCPOPT, &tcpopt);
|
---|
| 1473 | if (result == -1)
|
---|
| 1474 | {
|
---|
| 1475 | fprintf(stderr,
|
---|
| 1476 | "rlogin: NWIOSTCPOPT on %d failed (%s)\n",
|
---|
| 1477 | rem, strerror(errno));
|
---|
| 1478 | exit(1);
|
---|
| 1479 | }
|
---|
| 1480 | return;
|
---|
| 1481 | }
|
---|
| 1482 | if (result == -1 && error == ENOURG)
|
---|
| 1483 | {
|
---|
| 1484 | #if DEBUG
|
---|
| 1485 | fprintf(stderr, "\n\rENOURG\n\r");
|
---|
| 1486 | #endif
|
---|
| 1487 | rd_rem_urg= 0;
|
---|
| 1488 | tcpopt.nwto_flags= NWTO_RCV_NOTURG;
|
---|
| 1489 | result= ioctl(rem, NWIOSTCPOPT, &tcpopt);
|
---|
| 1490 | if (result == -1)
|
---|
| 1491 | {
|
---|
| 1492 | fprintf(stderr,
|
---|
| 1493 | "rlogin: NWIOSTCPOPT on %d failed (%s)\n",
|
---|
| 1494 | rem, strerror(errno));
|
---|
| 1495 | exit(1);
|
---|
| 1496 | }
|
---|
| 1497 | if (urg_1_size != 0)
|
---|
| 1498 | {
|
---|
| 1499 | urg_byte= urg_1[urg_1_size-1];
|
---|
| 1500 | urg_1_size--;
|
---|
| 1501 | do_urg(urg_byte);
|
---|
| 1502 | if (urg_1_size == 0)
|
---|
| 1503 | return;
|
---|
| 1504 | if (extra_1_new_size + urg_1_size > MAX_EXTRA_1_NEW_SIZE)
|
---|
| 1505 | {
|
---|
| 1506 | extra_1_new_size= 0;
|
---|
| 1507 | free(extra_1_new);
|
---|
| 1508 | extra_1_new= NULL;
|
---|
| 1509 | }
|
---|
| 1510 | if (extra_1_new_size != 0)
|
---|
| 1511 | {
|
---|
| 1512 | new_buf= realloc(extra_1_new,
|
---|
| 1513 | extra_1_new_size+urg_1_size);
|
---|
| 1514 | if (new_buf == 0)
|
---|
| 1515 | {
|
---|
| 1516 | extra_1_new_size= 0;
|
---|
| 1517 | free(extra_1_new);
|
---|
| 1518 | extra_1_new= NULL;
|
---|
| 1519 | }
|
---|
| 1520 | else
|
---|
| 1521 | {
|
---|
| 1522 | extra_1_new= new_buf;
|
---|
| 1523 | memcpy(extra_1_new+extra_1_new_size,
|
---|
| 1524 | urg_1, urg_1_size);
|
---|
| 1525 | extra_1_new_size += urg_1_size;
|
---|
| 1526 | urg_1_size= 0;
|
---|
| 1527 | free(urg_1);
|
---|
| 1528 | urg_1= NULL;
|
---|
| 1529 | }
|
---|
| 1530 | }
|
---|
| 1531 | if (extra_1_new_size == 0)
|
---|
| 1532 | {
|
---|
| 1533 | extra_1_new_size= urg_1_size;
|
---|
| 1534 | extra_1_new= urg_1;
|
---|
| 1535 | urg_1_size= 0;
|
---|
| 1536 | urg_1= NULL;
|
---|
| 1537 | }
|
---|
| 1538 | more2read_rem= 0;
|
---|
| 1539 | more2write_1= 1;
|
---|
| 1540 | }
|
---|
| 1541 | return;
|
---|
| 1542 | }
|
---|
| 1543 | if (result == -1 && error == EINTR)
|
---|
| 1544 | {
|
---|
| 1545 | /* Never mind. */
|
---|
| 1546 | return;
|
---|
| 1547 | }
|
---|
| 1548 | if (result == 0)
|
---|
| 1549 | {
|
---|
| 1550 | msg("connection closed.");
|
---|
| 1551 | done(0);
|
---|
| 1552 | }
|
---|
| 1553 | if (result < 0) {
|
---|
| 1554 | fprintf(stderr, "rlogin: %s\n", strerror(error));
|
---|
| 1555 | }
|
---|
| 1556 | done(1);
|
---|
| 1557 | }
|
---|
| 1558 |
|
---|
| 1559 | static void
|
---|
| 1560 | completed_wr_rem(result, error)
|
---|
| 1561 | int result;
|
---|
| 1562 | int error;
|
---|
| 1563 | {
|
---|
| 1564 | inprogress_wr_rem= 0;
|
---|
| 1565 |
|
---|
| 1566 | if (result > 0)
|
---|
| 1567 | {
|
---|
| 1568 | if (extra_wr_rem != NULL)
|
---|
| 1569 | {
|
---|
| 1570 | assert (result <= extra_wr_rem_size);
|
---|
| 1571 | extra_wr_rem_size -= result;
|
---|
| 1572 | extra_wr_rem_offset += result;
|
---|
| 1573 | if (extra_wr_rem_size == 0)
|
---|
| 1574 | {
|
---|
| 1575 | free(extra_wr_rem);
|
---|
| 1576 | extra_wr_rem= NULL;
|
---|
| 1577 | if (wr_rem_size == 0)
|
---|
| 1578 | {
|
---|
| 1579 | more2write_rem= 0;
|
---|
| 1580 | more2read_0= 1;
|
---|
| 1581 | }
|
---|
| 1582 | }
|
---|
| 1583 | return;
|
---|
| 1584 | }
|
---|
| 1585 |
|
---|
| 1586 | assert (result <= wr_rem_size);
|
---|
| 1587 | wr_rem_size -= result;
|
---|
| 1588 | wr_rem_offset += result;
|
---|
| 1589 | if (wr_rem_size == 0)
|
---|
| 1590 | {
|
---|
| 1591 | more2write_rem= 0;
|
---|
| 1592 | more2read_0= 1;
|
---|
| 1593 | }
|
---|
| 1594 | return;
|
---|
| 1595 | }
|
---|
| 1596 | if (result < 0) {
|
---|
| 1597 | fprintf(stderr, "rlogin: %s\n", strerror(error));
|
---|
| 1598 | }
|
---|
| 1599 | done(1);
|
---|
| 1600 | }
|
---|
| 1601 |
|
---|
| 1602 | static void
|
---|
| 1603 | do_urg(urg_byte)
|
---|
| 1604 | int urg_byte;
|
---|
| 1605 | {
|
---|
| 1606 | #if DEBUG
|
---|
| 1607 | fprintf(stderr, "rlogin: warning got urg_byte 0x%x\r\n", urg_byte);
|
---|
| 1608 | #endif
|
---|
| 1609 | if (urg_byte & TIOCPKT_WINDOW)
|
---|
| 1610 | {
|
---|
| 1611 | if (dosigwinch == 0)
|
---|
| 1612 | {
|
---|
| 1613 | sendwindow();
|
---|
| 1614 | signal(SIGWINCH, sigwinch);
|
---|
| 1615 | }
|
---|
| 1616 | dosigwinch= 1;
|
---|
| 1617 | }
|
---|
| 1618 | }
|
---|
| 1619 |
|
---|
| 1620 | static void
|
---|
| 1621 | echo(c)
|
---|
| 1622 | int c;
|
---|
| 1623 | {
|
---|
| 1624 | u_char c1;
|
---|
| 1625 | char *new_buf;
|
---|
| 1626 |
|
---|
| 1627 | new_buf= realloc(extra_1_new, extra_1_new_size+6);
|
---|
| 1628 | if (new_buf == NULL)
|
---|
| 1629 | return;
|
---|
| 1630 | extra_1_new= new_buf;
|
---|
| 1631 | new_buf= extra_1_new+extra_1_new_size;
|
---|
| 1632 |
|
---|
| 1633 | c1= escapechar;
|
---|
| 1634 | if (c1 < ' ')
|
---|
| 1635 | {
|
---|
| 1636 | *new_buf++= '^';
|
---|
| 1637 | *new_buf++= c1 + '@';
|
---|
| 1638 | }
|
---|
| 1639 | else if (c1 == 0x7f)
|
---|
| 1640 | {
|
---|
| 1641 | *new_buf++= '^';
|
---|
| 1642 | *new_buf++= '?';
|
---|
| 1643 | }
|
---|
| 1644 | else
|
---|
| 1645 | *new_buf++= c1;
|
---|
| 1646 |
|
---|
| 1647 | if (c < ' ')
|
---|
| 1648 | {
|
---|
| 1649 | *new_buf++= '^';
|
---|
| 1650 | *new_buf++= c + '@';
|
---|
| 1651 | }
|
---|
| 1652 | else if (c == 0x7f)
|
---|
| 1653 | {
|
---|
| 1654 | *new_buf++= '^';
|
---|
| 1655 | *new_buf++= '?';
|
---|
| 1656 | }
|
---|
| 1657 | else
|
---|
| 1658 | *new_buf++= c;
|
---|
| 1659 |
|
---|
| 1660 | *new_buf++= '\r';
|
---|
| 1661 | *new_buf++= '\n';
|
---|
| 1662 | extra_1_new_size= new_buf-extra_1_new;
|
---|
| 1663 | more2write_1= 1;
|
---|
| 1664 | }
|
---|
| 1665 |
|
---|
| 1666 | static void
|
---|
| 1667 | finish()
|
---|
| 1668 | {
|
---|
| 1669 | done(0);
|
---|
| 1670 | }
|
---|
| 1671 |
|
---|
| 1672 | static char cmdbuf[256];
|
---|
| 1673 |
|
---|
| 1674 | static void
|
---|
| 1675 | subshell()
|
---|
| 1676 | {
|
---|
| 1677 | /* Start a subshell. Based on the first character of the command,
|
---|
| 1678 | * the tcp connection will be present at fd 3 ('+'), or at
|
---|
| 1679 | * fd 0 and fd 1 ('=')
|
---|
| 1680 | */
|
---|
| 1681 | int r, pid, stat, len;
|
---|
| 1682 | char *shell, *cmd;
|
---|
| 1683 |
|
---|
| 1684 | /* cancel the reads and writes that are in progress. */
|
---|
| 1685 | if (inprogress_0)
|
---|
| 1686 | {
|
---|
| 1687 | r= fcancel(0, ASIO_READ);
|
---|
| 1688 | if (r != 0) abort();
|
---|
| 1689 | }
|
---|
| 1690 | if (inprogress_1)
|
---|
| 1691 | {
|
---|
| 1692 | r= fcancel(1, ASIO_WRITE);
|
---|
| 1693 | if (r != 0) abort();
|
---|
| 1694 | }
|
---|
| 1695 | if (inprogress_rd_rem)
|
---|
| 1696 | {
|
---|
| 1697 | r= fcancel(rem, ASIO_READ);
|
---|
| 1698 | if (r != 0) abort();
|
---|
| 1699 | }
|
---|
| 1700 | if (inprogress_wr_rem)
|
---|
| 1701 | {
|
---|
| 1702 | r= fcancel(rem, ASIO_WRITE);
|
---|
| 1703 | if (r != 0) abort();
|
---|
| 1704 | }
|
---|
| 1705 |
|
---|
| 1706 | mode(0);
|
---|
| 1707 |
|
---|
| 1708 | pid= fork();
|
---|
| 1709 | if (pid == -1) abort();
|
---|
| 1710 | if (pid != 0)
|
---|
| 1711 | {
|
---|
| 1712 | r= waitpid(pid, &stat, 0);
|
---|
| 1713 | if (r != pid) abort();
|
---|
| 1714 |
|
---|
| 1715 | #if DEBUG
|
---|
| 1716 | fprintf(stderr, "stat: 0x%x\n", stat);
|
---|
| 1717 | #endif
|
---|
| 1718 | mode(1);
|
---|
| 1719 | return;
|
---|
| 1720 | }
|
---|
| 1721 |
|
---|
| 1722 | (void)signal(SIGINT, SIG_DFL);
|
---|
| 1723 |
|
---|
| 1724 | shell= getenv("SHELL");
|
---|
| 1725 | if (shell == NULL)
|
---|
| 1726 | shell= "/bin/sh";
|
---|
| 1727 | printf("~!\ncommand [%s]: ", shell);
|
---|
| 1728 | cmd= fgets(cmdbuf, sizeof(cmdbuf), stdin);
|
---|
| 1729 | if (cmd == NULL)
|
---|
| 1730 | exit(0);
|
---|
| 1731 | #if DEBUG
|
---|
| 1732 | printf("got command '%s'\n", cmd);
|
---|
| 1733 | #endif
|
---|
| 1734 |
|
---|
| 1735 | /* Strip the trailing newline */
|
---|
| 1736 | len= strlen(cmd);
|
---|
| 1737 | if (len > 0 && cmd[len-1] == '\n')
|
---|
| 1738 | cmd[len-1]= '\0';
|
---|
| 1739 | else
|
---|
| 1740 | printf("\n");
|
---|
| 1741 |
|
---|
| 1742 | /* Skip leading white space */
|
---|
| 1743 | while (*cmd != '\0' && isspace(*cmd))
|
---|
| 1744 | cmd++;
|
---|
| 1745 |
|
---|
| 1746 | if (*cmd == '+')
|
---|
| 1747 | {
|
---|
| 1748 | if (rem != 3)
|
---|
| 1749 | {
|
---|
| 1750 | dup2(rem, 3);
|
---|
| 1751 | close(rem);
|
---|
| 1752 | }
|
---|
| 1753 | cmd++;
|
---|
| 1754 | }
|
---|
| 1755 | else if (*cmd == '=')
|
---|
| 1756 | {
|
---|
| 1757 | dup2(rem, 0);
|
---|
| 1758 | dup2(rem, 1);
|
---|
| 1759 | close(rem);
|
---|
| 1760 | cmd++;
|
---|
| 1761 | }
|
---|
| 1762 | else
|
---|
| 1763 | close(rem);
|
---|
| 1764 | if (*cmd == '\0')
|
---|
| 1765 | {
|
---|
| 1766 | r= execl(shell, shell, NULL);
|
---|
| 1767 | }
|
---|
| 1768 | else
|
---|
| 1769 | {
|
---|
| 1770 | r= execl("/bin/sh", "sh", "-c", cmd, NULL);
|
---|
| 1771 | }
|
---|
| 1772 | printf("exec failed: %d, %d\n", r, errno);
|
---|
| 1773 | exit(0);
|
---|
| 1774 | }
|
---|
| 1775 | #endif /* __minix_vmd */
|
---|