2 * PLink - a command-line (stdin/stdout) variant of PuTTY.
15 #include <sys/ioctl.h>
17 #ifndef HAVE_NO_SYS_SELECT_H
18 #include <sys/select.h>
21 #define PUTTY_DO_GLOBALS /* actually _define_ globals */
26 #define MAX_STDIN_BACKLOG 4096
30 static struct termios orig_termios;
32 void fatalbox(char *p, ...)
37 fprintf(stderr, "FATAL ERROR: ");
39 vfprintf(stderr, p, ap);
49 void modalfatalbox(char *p, ...)
54 fprintf(stderr, "FATAL ERROR: ");
56 vfprintf(stderr, p, ap);
66 void connection_fatal(void *frontend, char *p, ...)
71 fprintf(stderr, "FATAL ERROR: ");
73 vfprintf(stderr, p, ap);
83 void cmdline_error(char *p, ...)
88 fprintf(stderr, "plink: ");
90 vfprintf(stderr, p, ap);
97 static int local_tty = FALSE; /* do we have a local tty? */
100 static void *backhandle;
104 * Default settings that are specific to pterm.
106 char *platform_default_s(const char *name)
108 if (!strcmp(name, "TermType"))
109 return dupstr(getenv("TERM"));
110 if (!strcmp(name, "UserName"))
111 return get_username();
112 if (!strcmp(name, "SerialLine"))
113 return dupstr("/dev/ttyS0");
117 int platform_default_i(const char *name, int def)
119 if (!strcmp(name, "TermWidth") ||
120 !strcmp(name, "TermHeight")) {
122 if (ioctl(STDIN_FILENO, TIOCGWINSZ, (void *)&size) >= 0)
123 return (!strcmp(name, "TermWidth") ? size.ws_col : size.ws_row);
128 FontSpec platform_default_fontspec(const char *name)
135 Filename platform_default_filename(const char *name)
138 if (!strcmp(name, "LogFileName"))
139 strcpy(ret.path, "putty.log");
145 char *x_get_default(const char *key)
147 return NULL; /* this is a stub */
149 int term_ldisc(Terminal *term, int mode)
153 void ldisc_update(void *frontend, int echo, int edit)
155 /* Update stdin read mode to reflect changes in line discipline. */
158 if (!local_tty) return;
163 mode.c_lflag |= ECHO;
165 mode.c_lflag &= ~ECHO;
168 mode.c_iflag |= ICRNL;
169 mode.c_lflag |= ISIG | ICANON;
170 mode.c_oflag |= OPOST;
172 mode.c_iflag &= ~ICRNL;
173 mode.c_lflag &= ~(ISIG | ICANON);
174 mode.c_oflag &= ~OPOST;
175 /* Solaris sets these to unhelpful values */
177 mode.c_cc[VTIME] = 0;
178 /* FIXME: perhaps what we do with IXON/IXOFF should be an
179 * argument to ldisc_update(), to allow implementation of SSH-2
180 * "xon-xoff" and Rlogin's equivalent? */
181 mode.c_iflag &= ~IXON;
182 mode.c_iflag &= ~IXOFF;
185 * Mark parity errors and (more important) BREAK on input. This
186 * is more complex than it need be because POSIX-2001 suggests
187 * that escaping of valid 0xff in the input stream is dependent on
188 * IGNPAR being clear even though marking of BREAK isn't. NetBSD
189 * 2.0 goes one worse and makes it dependent on INPCK too. We
190 * deal with this by forcing these flags into a useful state and
191 * then faking the state in which we found them in from_tty() if
192 * we get passed a parity or framing error.
194 mode.c_iflag = (mode.c_iflag | INPCK | PARMRK) & ~IGNPAR;
196 tcsetattr(STDIN_FILENO, TCSANOW, &mode);
199 /* Helper function to extract a special character from a termios. */
200 static char *get_ttychar(struct termios *t, int index)
202 cc_t c = t->c_cc[index];
203 #if defined(_POSIX_VDISABLE)
204 if (c == _POSIX_VDISABLE)
205 return dupprintf("");
207 return dupprintf("^<%d>", c);
210 char *get_ttymode(void *frontend, const char *mode)
213 * Propagate appropriate terminal modes from the local terminal,
216 if (!local_tty) return NULL;
218 #define GET_CHAR(ourname, uxname) \
220 if (strcmp(mode, ourname) == 0) \
221 return get_ttychar(&orig_termios, uxname); \
223 #define GET_BOOL(ourname, uxname, uxmemb, transform) \
225 if (strcmp(mode, ourname) == 0) { \
226 int b = (orig_termios.uxmemb & uxname) != 0; \
228 return dupprintf("%d", b); \
233 * Modes that want to be the same on all terminal devices involved.
235 /* All the special characters supported by SSH */
237 GET_CHAR("INTR", VINTR);
240 GET_CHAR("QUIT", VQUIT);
243 GET_CHAR("ERASE", VERASE);
246 GET_CHAR("KILL", VKILL);
249 GET_CHAR("EOF", VEOF);
252 GET_CHAR("EOL", VEOL);
255 GET_CHAR("EOL2", VEOL2);
258 GET_CHAR("START", VSTART);
261 GET_CHAR("STOP", VSTOP);
264 GET_CHAR("SUSP", VSUSP);
267 GET_CHAR("DSUSP", VDSUSP);
269 #if defined(VREPRINT)
270 GET_CHAR("REPRINT", VREPRINT);
273 GET_CHAR("WERASE", VWERASE);
276 GET_CHAR("LNEXT", VLNEXT);
279 GET_CHAR("FLUSH", VFLUSH);
282 GET_CHAR("SWTCH", VSWTCH);
285 GET_CHAR("STATUS", VSTATUS);
287 #if defined(VDISCARD)
288 GET_CHAR("DISCARD", VDISCARD);
290 /* Modes that "configure" other major modes. These should probably be
291 * considered as user preferences. */
292 /* Configuration of ICANON */
294 GET_BOOL("ECHOK", ECHOK, c_lflag, );
297 GET_BOOL("ECHOKE", ECHOKE, c_lflag, );
300 GET_BOOL("ECHOE", ECHOE, c_lflag, );
303 GET_BOOL("ECHONL", ECHONL, c_lflag, );
306 GET_BOOL("XCASE", XCASE, c_lflag, );
308 /* Configuration of ECHO */
310 GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, );
312 /* Configuration of IXON/IXOFF */
314 GET_BOOL("IXANY", IXANY, c_iflag, );
316 /* Configuration of OPOST */
318 GET_BOOL("OLCUC", OLCUC, c_oflag, );
321 GET_BOOL("ONLCR", ONLCR, c_oflag, );
324 GET_BOOL("OCRNL", OCRNL, c_oflag, );
327 GET_BOOL("ONOCR", ONOCR, c_oflag, );
330 GET_BOOL("ONLRET", ONLRET, c_oflag, );
334 * Modes that want to be set in only one place, and that we have
338 GET_BOOL("ISIG", ISIG, c_lflag, );
341 GET_BOOL("ICANON", ICANON, c_lflag, );
344 GET_BOOL("ECHO", ECHO, c_lflag, );
347 GET_BOOL("IXON", IXON, c_iflag, );
350 GET_BOOL("IXOFF", IXOFF, c_iflag, );
353 GET_BOOL("OPOST", OPOST, c_oflag, );
357 * We do not propagate the following modes:
358 * - Parity/serial settings, which are a local affair and don't
359 * make sense propagated over SSH's 8-bit byte-stream.
360 * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD
361 * - Things that want to be enabled in one place that we don't
366 * - Things I don't know what to do with. (FIXME)
367 * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN
374 /* Fall through to here for unrecognised names, or ones that are
375 * unsupported on this platform */
379 void cleanup_termios(void)
382 tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios);
385 bufchain stdout_data, stderr_data;
387 int try_output(int is_stderr)
389 bufchain *chain = (is_stderr ? &stderr_data : &stdout_data);
390 int fd = (is_stderr ? STDERR_FILENO : STDOUT_FILENO);
392 int sendlen, ret, fl;
394 if (bufchain_size(chain) == 0)
395 return bufchain_size(&stdout_data) + bufchain_size(&stderr_data);
397 fl = fcntl(fd, F_GETFL);
398 if (fl != -1 && !(fl & O_NONBLOCK))
399 fcntl(fd, F_SETFL, fl | O_NONBLOCK);
401 bufchain_prefix(chain, &senddata, &sendlen);
402 ret = write(fd, senddata, sendlen);
404 bufchain_consume(chain, ret);
405 } while (ret == sendlen && bufchain_size(chain) != 0);
406 if (fl != -1 && !(fl & O_NONBLOCK))
407 fcntl(fd, F_SETFL, fl);
408 if (ret < 0 && errno != EAGAIN) {
409 perror(is_stderr ? "stderr: write" : "stdout: write");
412 return bufchain_size(&stdout_data) + bufchain_size(&stderr_data);
415 int from_backend(void *frontend_handle, int is_stderr,
416 const char *data, int len)
419 bufchain_add(&stderr_data, data, len);
420 return try_output(TRUE);
422 bufchain_add(&stdout_data, data, len);
423 return try_output(FALSE);
427 int from_backend_untrusted(void *frontend_handle, const char *data, int len)
430 * No "untrusted" output should get here (the way the code is
431 * currently, it's all diverted by FLAG_STDERR).
433 assert(!"Unexpected call to from_backend_untrusted()");
434 return 0; /* not reached */
437 int get_userpass_input(prompts_t *p, unsigned char *in, int inlen)
440 ret = cmdline_get_passwd_input(p, in, inlen);
442 ret = console_get_userpass_input(p, in, inlen);
447 * Handle data from a local tty in PARMRK format.
449 static void from_tty(void *vbuf, unsigned len)
451 char *p, *q, *end, *buf = vbuf;
452 static enum {NORMAL, FF, FF00} state = NORMAL;
454 p = buf; end = buf + len;
462 q = memchr(p, '\xff', end - p);
463 if (q == NULL) q = end;
464 back->send(backhandle, p, q - p);
470 back->send(backhandle, p, 1);
473 } else if (*p == '\0') {
480 back->special(backhandle, TS_BRK);
483 * Pretend that PARMRK wasn't set. This involves
484 * faking what INPCK and IGNPAR would have done if
485 * we hadn't overridden them. Unfortunately, we
486 * can't do this entirely correctly because INPCK
487 * distinguishes between framing and parity
488 * errors, but PARMRK format represents both in
489 * the same way. We assume that parity errors are
490 * more common than framing errors, and hence
491 * treat all input errors as being subject to
494 if (orig_termios.c_iflag & INPCK) {
495 /* If IGNPAR is set, we throw away the character. */
496 if (!(orig_termios.c_iflag & IGNPAR)) {
497 /* PE/FE get passed on as NUL. */
499 back->send(backhandle, p, 1);
502 /* INPCK not set. Assume we got a parity error. */
503 back->send(backhandle, p, 1);
514 void sigwinch(int signum)
516 if (write(signalpipe[1], "x", 1) <= 0)
517 /* not much we can do about it */;
521 * In Plink our selects are synchronous, so these functions are
524 int uxsel_input_add(int fd, int rwx) { return 0; }
525 void uxsel_input_remove(int id) { }
528 * Short description of parameters.
530 static void usage(void)
532 printf("PuTTY Link: command-line connection utility\n");
534 printf("Usage: plink [options] [user@]host [command]\n");
535 printf(" (\"host\" can also be a PuTTY saved session name)\n");
536 printf("Options:\n");
537 printf(" -V print version information and exit\n");
538 printf(" -pgpfp print PGP key fingerprints and exit\n");
539 printf(" -v show verbose messages\n");
540 printf(" -load sessname Load settings from saved session\n");
541 printf(" -ssh -telnet -rlogin -raw -serial\n");
542 printf(" force use of a particular protocol\n");
543 printf(" -P port connect to specified port\n");
544 printf(" -l user connect with specified username\n");
545 printf(" -batch disable all interactive prompts\n");
546 printf("The following options only apply to SSH connections:\n");
547 printf(" -pw passw login with specified password\n");
548 printf(" -D [listen-IP:]listen-port\n");
549 printf(" Dynamic SOCKS-based port forwarding\n");
550 printf(" -L [listen-IP:]listen-port:host:port\n");
551 printf(" Forward local port to remote address\n");
552 printf(" -R [listen-IP:]listen-port:host:port\n");
553 printf(" Forward remote port to local address\n");
554 printf(" -X -x enable / disable X11 forwarding\n");
555 printf(" -A -a enable / disable agent forwarding\n");
556 printf(" -t -T enable / disable pty allocation\n");
557 printf(" -1 -2 force use of particular protocol version\n");
558 printf(" -4 -6 force use of IPv4 or IPv6\n");
559 printf(" -C enable compression\n");
560 printf(" -i key private key file for authentication\n");
561 printf(" -noagent disable use of Pageant\n");
562 printf(" -agent enable use of Pageant\n");
563 printf(" -m file read remote command(s) from file\n");
564 printf(" -s remote command is an SSH subsystem (SSH-2 only)\n");
565 printf(" -N don't start a shell/command (SSH-2 only)\n");
566 printf(" -nc host:port\n");
567 printf(" open tunnel in place of session (SSH-2 only)\n");
568 printf(" -sercfg configuration-string (e.g. 19200,8,n,1,X)\n");
569 printf(" Specify the serial configuration (serial only)\n");
573 static void version(void)
575 printf("plink: %s\n", ver);
579 int main(int argc, char **argv)
585 int i, fdcount, fdsize, fdstate;
589 int use_subsystem = 0;
590 int got_host = FALSE;
594 fdcount = fdsize = 0;
596 * Initialise port and protocol to sensible defaults. (These
597 * will be overridden by more or less anything.)
599 default_protocol = PROT_SSH;
602 flags = FLAG_STDERR | FLAG_STDERR_TTY;
606 * Process the command line.
609 do_defaults(NULL, conf);
610 loaded_session = FALSE;
611 default_protocol = conf_get_int(conf, CONF_protocol);
612 default_port = conf_get_int(conf, CONF_port);
616 * Override the default protocol if PLINK_PROTOCOL is set.
618 char *p = getenv("PLINK_PROTOCOL");
620 const Backend *b = backend_from_name(p);
622 default_protocol = b->protocol;
623 default_port = b->default_port;
624 conf_set_int(conf, CONF_protocol, default_protocol);
625 conf_set_int(conf, CONF_port, default_port);
632 int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL),
636 "plink: option \"%s\" requires an argument\n", p);
638 } else if (ret == 2) {
640 } else if (ret == 1) {
642 } else if (!strcmp(p, "-batch")) {
643 console_batch_mode = 1;
644 } else if (!strcmp(p, "-s")) {
645 /* Save status to write to conf later. */
647 } else if (!strcmp(p, "-V")) {
649 } else if (!strcmp(p, "-pgpfp")) {
652 } else if (!strcmp(p, "-o")) {
655 "plink: option \"-o\" requires an argument\n");
659 provide_xrm_string(*++argv);
662 fprintf(stderr, "plink: unknown option \"%s\"\n", p);
666 if (!conf_launchable(conf) || !(got_host || loaded_session)) {
670 * If the hostname starts with "telnet:", set the
671 * protocol to Telnet and process the string as a
674 if (!strncmp(q, "telnet:", 7)) {
678 if (q[0] == '/' && q[1] == '/')
680 conf_set_int(conf, CONF_protocol, PROT_TELNET);
682 while (*p && *p != ':' && *p != '/')
688 conf_set_int(conf, CONF_port, atoi(p));
690 conf_set_int(conf, CONF_port, -1);
691 conf_set_str(conf, CONF_host, q);
694 char *r, *user, *host;
696 * Before we process the [user@]host string, we
697 * first check for the presence of a protocol
698 * prefix (a protocol name followed by ",").
704 b = backend_from_name(p);
706 default_protocol = b->protocol;
707 conf_set_int(conf, CONF_protocol,
709 portnumber = b->default_port;
715 * A nonzero length string followed by an @ is treated
716 * as a username. (We discount an _initial_ @.) The
717 * rest of the string (or the whole string if no @)
718 * is treated as a session name and/or hostname.
722 p++, r = NULL; /* discount initial @ */
727 user = NULL, host = p;
731 * Now attempt to load a saved session with the
732 * same name as the hostname.
735 Conf *conf2 = conf_new();
736 do_defaults(host, conf2);
737 if (loaded_session || !conf_launchable(conf2)) {
738 /* No settings for this host; use defaults */
739 /* (or session was already loaded with -load) */
740 conf_set_str(conf, CONF_host, host);
741 conf_set_int(conf, CONF_port, default_port);
744 conf_copy_into(conf, conf2);
745 loaded_session = TRUE;
751 /* Patch in specified username. */
752 conf_set_str(conf, CONF_username, user);
759 cmdlen = cmdsize = 0;
764 if (cmdlen >= cmdsize) {
765 cmdsize = cmdlen + 512;
766 command = sresize(command, cmdsize, char);
768 command[cmdlen++]=*p++;
770 if (cmdlen >= cmdsize) {
771 cmdsize = cmdlen + 512;
772 command = sresize(command, cmdsize, char);
774 command[cmdlen++]=' '; /* always add trailing space */
775 if (--argc) p = *++argv;
777 if (cmdlen) command[--cmdlen]='\0';
778 /* change trailing blank to NUL */
779 conf_set_str(conf, CONF_remote_cmd, command);
780 conf_set_str(conf, CONF_remote_cmd2, "");
781 conf_set_int(conf, CONF_nopty, TRUE); /* command => no tty */
783 break; /* done with cmdline */
791 if (!conf_launchable(conf) || !(got_host || loaded_session)) {
796 * Muck about with the hostname in various ways.
799 char *hostbuf = dupstr(conf_get_str(conf, CONF_host));
800 char *host = hostbuf;
804 * Trim leading whitespace.
806 host += strspn(host, " \t");
809 * See if host is of the form user@host, and separate out
810 * the username if so.
812 if (host[0] != '\0') {
813 char *atsign = strrchr(host, '@');
816 conf_set_str(conf, CONF_username, host);
822 * Trim off a colon suffix if it's there.
824 host[strcspn(host, ":")] = '\0';
827 * Remove any remaining whitespace.
832 if (*q != ' ' && *q != '\t')
838 conf_set_str(conf, CONF_host, hostbuf);
843 * Perform command-line overrides on session configuration.
845 cmdline_run_saved(conf);
848 * Apply subsystem status.
851 conf_set_int(conf, CONF_ssh_subsys, TRUE);
853 if (!*conf_get_str(conf, CONF_remote_cmd) &&
854 !*conf_get_str(conf, CONF_remote_cmd2) &&
855 !*conf_get_str(conf, CONF_ssh_nc_host))
856 flags |= FLAG_INTERACTIVE;
859 * Select protocol. This is farmed out into a table in a
860 * separate file to enable an ssh-free variant.
862 back = backend_from_proto(conf_get_int(conf, CONF_protocol));
865 "Internal fault: Unsupported protocol found\n");
872 if (portnumber != -1)
873 conf_set_int(conf, CONF_port, portnumber);
876 * Set up the pipe we'll use to tell us about SIGWINCH.
878 if (pipe(signalpipe) < 0) {
882 putty_signal(SIGWINCH, sigwinch);
888 * Unix Plink doesn't provide any way to add forwardings after the
889 * connection is set up, so if there are none now, we can safely set
892 if (conf_get_int(conf, CONF_protocol) == PROT_SSH &&
893 !conf_get_int(conf, CONF_x11_forward) &&
894 !conf_get_int(conf, CONF_agentfwd) &&
895 !conf_get_str_nthstrkey(conf, CONF_portfwd, 0))
896 conf_set_int(conf, CONF_ssh_simple, TRUE);
899 * Start up the connection.
901 logctx = log_init(NULL, conf);
902 console_provide_logctx(logctx);
906 /* nodelay is only useful if stdin is a terminal device */
907 int nodelay = conf_get_int(conf, CONF_tcp_nodelay) && isatty(0);
909 error = back->init(NULL, &backhandle, conf,
910 conf_get_str(conf, CONF_host),
911 conf_get_int(conf, CONF_port),
913 conf_get_int(conf, CONF_tcp_keepalives));
915 fprintf(stderr, "Unable to open connection:\n%s\n", error);
918 back->provide_logctx(backhandle, logctx);
919 ldisc_create(conf, NULL, back, backhandle, NULL);
925 * Set up the initial console mode. We don't care if this call
926 * fails, because we know we aren't necessarily running in a
929 local_tty = (tcgetattr(STDIN_FILENO, &orig_termios) == 0);
930 atexit(cleanup_termios);
931 ldisc_update(NULL, 1, 1);
933 now = GETTICKCOUNT();
936 fd_set rset, wset, xset;
946 FD_SET_MAX(signalpipe[0], maxfd, rset);
948 if (connopen && !sending &&
949 back->connected(backhandle) &&
950 back->sendok(backhandle) &&
951 back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) {
952 /* If we're OK to send, then try to read from stdin. */
953 FD_SET_MAX(STDIN_FILENO, maxfd, rset);
956 if (bufchain_size(&stdout_data) > 0) {
957 /* If we have data for stdout, try to write to stdout. */
958 FD_SET_MAX(STDOUT_FILENO, maxfd, wset);
961 if (bufchain_size(&stderr_data) > 0) {
962 /* If we have data for stderr, try to write to stderr. */
963 FD_SET_MAX(STDERR_FILENO, maxfd, wset);
966 /* Count the currently active fds. */
968 for (fd = first_fd(&fdstate, &rwx); fd >= 0;
969 fd = next_fd(&fdstate, &rwx)) i++;
971 /* Expand the fdlist buffer if necessary. */
974 fdlist = sresize(fdlist, fdsize, int);
978 * Add all currently open fds to the select sets, and store
979 * them in fdlist as well.
982 for (fd = first_fd(&fdstate, &rwx); fd >= 0;
983 fd = next_fd(&fdstate, &rwx)) {
984 fdlist[fdcount++] = fd;
986 FD_SET_MAX(fd, maxfd, rset);
988 FD_SET_MAX(fd, maxfd, wset);
990 FD_SET_MAX(fd, maxfd, xset);
995 struct timeval tv, *ptv;
997 if (run_timers(now, &next)) {
998 ticks = next - GETTICKCOUNT();
999 if (ticks < 0) ticks = 0; /* just in case */
1000 tv.tv_sec = ticks / 1000;
1001 tv.tv_usec = ticks % 1000 * 1000;
1006 ret = select(maxfd, &rset, &wset, &xset, ptv);
1010 long newnow = GETTICKCOUNT();
1012 * Check to see whether the system clock has
1013 * changed massively during the select.
1015 if (newnow - now < 0 || newnow - now > next - now) {
1017 * If so, look at the elapsed time in the
1018 * select and use it to compute a new
1021 long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000;
1022 /* So we'd like GETTICKCOUNT to have returned othernow,
1023 * but instead it return newnow. Hence ... */
1024 tickcount_offset += othernow - newnow;
1030 } while (ret < 0 && errno == EINTR);
1037 for (i = 0; i < fdcount; i++) {
1040 * We must process exceptional notifications before
1041 * ordinary readability ones, or we may go straight
1042 * past the urgent marker.
1044 if (FD_ISSET(fd, &xset))
1045 select_result(fd, 4);
1046 if (FD_ISSET(fd, &rset))
1047 select_result(fd, 1);
1048 if (FD_ISSET(fd, &wset))
1049 select_result(fd, 2);
1052 if (FD_ISSET(signalpipe[0], &rset)) {
1054 struct winsize size;
1055 if (read(signalpipe[0], c, 1) <= 0)
1057 /* ignore its value; it'll be `x' */
1058 if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0)
1059 back->size(backhandle, size.ws_col, size.ws_row);
1062 if (FD_ISSET(STDIN_FILENO, &rset)) {
1066 if (connopen && back->connected(backhandle)) {
1067 ret = read(STDIN_FILENO, buf, sizeof(buf));
1069 perror("stdin: read");
1071 } else if (ret == 0) {
1072 back->special(backhandle, TS_EOF);
1073 sending = FALSE; /* send nothing further after this */
1078 back->send(backhandle, buf, ret);
1083 if (FD_ISSET(STDOUT_FILENO, &wset)) {
1084 back->unthrottle(backhandle, try_output(FALSE));
1087 if (FD_ISSET(STDERR_FILENO, &wset)) {
1088 back->unthrottle(backhandle, try_output(TRUE));
1091 if ((!connopen || !back->connected(backhandle)) &&
1092 bufchain_size(&stdout_data) == 0 &&
1093 bufchain_size(&stderr_data) == 0)
1094 break; /* we closed the connection */
1096 exitcode = back->exitcode(backhandle);
1098 fprintf(stderr, "Remote process exit code unavailable\n");
1099 exitcode = 1; /* this is an error condition */
1101 cleanup_exit(exitcode);
1102 return exitcode; /* shouldn't happen, but placates gcc */