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
28 void fatalbox(char *p
, ...)
31 fprintf(stderr
, "FATAL ERROR: ");
33 vfprintf(stderr
, p
, ap
);
38 void modalfatalbox(char *p
, ...)
41 fprintf(stderr
, "FATAL ERROR: ");
43 vfprintf(stderr
, p
, ap
);
48 void connection_fatal(void *frontend
, char *p
, ...)
51 fprintf(stderr
, "FATAL ERROR: ");
53 vfprintf(stderr
, p
, ap
);
58 void cmdline_error(char *p
, ...)
61 fprintf(stderr
, "plink: ");
63 vfprintf(stderr
, p
, ap
);
69 static int local_tty
= 0; /* do we have a local tty? */
70 static struct termios orig_termios
;
73 static void *backhandle
;
77 * Default settings that are specific to pterm.
79 char *platform_default_s(const char *name
)
81 if (!strcmp(name
, "TermType"))
82 return dupstr(getenv("TERM"));
83 if (!strcmp(name
, "UserName"))
84 return get_username();
85 if (!strcmp(name
, "SerialLine"))
86 return dupstr("/dev/ttyS0");
90 int platform_default_i(const char *name
, int def
)
92 if (!strcmp(name
, "TermWidth") ||
93 !strcmp(name
, "TermHeight")) {
95 if (ioctl(0, TIOCGWINSZ
, (void *)&size
) >= 0)
96 return (!strcmp(name
, "TermWidth") ? size
.ws_col
: size
.ws_row
);
101 FontSpec
platform_default_fontspec(const char *name
)
108 Filename
platform_default_filename(const char *name
)
111 if (!strcmp(name
, "LogFileName"))
112 strcpy(ret
.path
, "putty.log");
118 char *x_get_default(const char *key
)
120 return NULL
; /* this is a stub */
122 int term_ldisc(Terminal
*term
, int mode
)
126 void ldisc_update(void *frontend
, int echo
, int edit
)
128 /* Update stdin read mode to reflect changes in line discipline. */
131 if (!local_tty
) return;
136 mode
.c_lflag
|= ECHO
;
138 mode
.c_lflag
&= ~ECHO
;
141 mode
.c_iflag
|= ICRNL
;
142 mode
.c_lflag
|= ISIG
| ICANON
;
143 mode
.c_oflag
|= OPOST
;
145 mode
.c_iflag
&= ~ICRNL
;
146 mode
.c_lflag
&= ~(ISIG
| ICANON
);
147 mode
.c_oflag
&= ~OPOST
;
148 /* Solaris sets these to unhelpful values */
150 mode
.c_cc
[VTIME
] = 0;
151 /* FIXME: perhaps what we do with IXON/IXOFF should be an
152 * argument to ldisc_update(), to allow implementation of SSH-2
153 * "xon-xoff" and Rlogin's equivalent? */
154 mode
.c_iflag
&= ~IXON
;
155 mode
.c_iflag
&= ~IXOFF
;
158 * Mark parity errors and (more important) BREAK on input. This
159 * is more complex than it need be because POSIX-2001 suggests
160 * that escaping of valid 0xff in the input stream is dependent on
161 * IGNPAR being clear even though marking of BREAK isn't. NetBSD
162 * 2.0 goes one worse and makes it dependent on INPCK too. We
163 * deal with this by forcing these flags into a useful state and
164 * then faking the state in which we found them in from_tty() if
165 * we get passed a parity or framing error.
167 mode
.c_iflag
= (mode
.c_iflag
| INPCK
| PARMRK
) & ~IGNPAR
;
169 tcsetattr(0, TCSANOW
, &mode
);
172 /* Helper function to extract a special character from a termios. */
173 static char *get_ttychar(struct termios
*t
, int index
)
175 cc_t c
= t
->c_cc
[index
];
176 #if defined(_POSIX_VDISABLE)
177 if (c
== _POSIX_VDISABLE
)
178 return dupprintf("");
180 return dupprintf("^<%d>", c
);
183 char *get_ttymode(void *frontend
, const char *mode
)
186 * Propagate appropriate terminal modes from the local terminal,
189 if (!local_tty
) return NULL
;
191 #define GET_CHAR(ourname, uxname) \
193 if (strcmp(mode, ourname) == 0) \
194 return get_ttychar(&orig_termios, uxname); \
196 #define GET_BOOL(ourname, uxname, uxmemb, transform) \
198 if (strcmp(mode, ourname) == 0) { \
199 int b = (orig_termios.uxmemb & uxname) != 0; \
201 return dupprintf("%d", b); \
206 * Modes that want to be the same on all terminal devices involved.
208 /* All the special characters supported by SSH */
210 GET_CHAR("INTR", VINTR
);
213 GET_CHAR("QUIT", VQUIT
);
216 GET_CHAR("ERASE", VERASE
);
219 GET_CHAR("KILL", VKILL
);
222 GET_CHAR("EOF", VEOF
);
225 GET_CHAR("EOL", VEOL
);
228 GET_CHAR("EOL2", VEOL2
);
231 GET_CHAR("START", VSTART
);
234 GET_CHAR("STOP", VSTOP
);
237 GET_CHAR("SUSP", VSUSP
);
240 GET_CHAR("DSUSP", VDSUSP
);
242 #if defined(VREPRINT)
243 GET_CHAR("REPRINT", VREPRINT
);
246 GET_CHAR("WERASE", VWERASE
);
249 GET_CHAR("LNEXT", VLNEXT
);
252 GET_CHAR("FLUSH", VFLUSH
);
255 GET_CHAR("SWTCH", VSWTCH
);
258 GET_CHAR("STATUS", VSTATUS
);
260 #if defined(VDISCARD)
261 GET_CHAR("DISCARD", VDISCARD
);
263 /* Modes that "configure" other major modes. These should probably be
264 * considered as user preferences. */
265 /* Configuration of ICANON */
267 GET_BOOL("ECHOK", ECHOK
, c_lflag
, );
270 GET_BOOL("ECHOKE", ECHOKE
, c_lflag
, );
273 GET_BOOL("ECHOE", ECHOE
, c_lflag
, );
276 GET_BOOL("ECHONL", ECHONL
, c_lflag
, );
279 GET_BOOL("XCASE", XCASE
, c_lflag
, );
281 /* Configuration of ECHO */
283 GET_BOOL("ECHOCTL", ECHOCTL
, c_lflag
, );
285 /* Configuration of IXON/IXOFF */
287 GET_BOOL("IXANY", IXANY
, c_iflag
, );
289 /* Configuration of OPOST */
291 GET_BOOL("OLCUC", OLCUC
, c_oflag
, );
294 GET_BOOL("ONLCR", ONLCR
, c_oflag
, );
297 GET_BOOL("OCRNL", OCRNL
, c_oflag
, );
300 GET_BOOL("ONOCR", ONOCR
, c_oflag
, );
303 GET_BOOL("ONLRET", ONLRET
, c_oflag
, );
307 * Modes that want to be set in only one place, and that we have
311 GET_BOOL("ISIG", ISIG
, c_lflag
, );
314 GET_BOOL("ICANON", ICANON
, c_lflag
, );
317 GET_BOOL("ECHO", ECHO
, c_lflag
, );
320 GET_BOOL("IXON", IXON
, c_iflag
, );
323 GET_BOOL("IXOFF", IXOFF
, c_iflag
, );
326 GET_BOOL("OPOST", OPOST
, c_oflag
, );
330 * We do not propagate the following modes:
331 * - Parity/serial settings, which are a local affair and don't
332 * make sense propagated over SSH's 8-bit byte-stream.
333 * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD
334 * - Things that want to be enabled in one place that we don't
339 * - Things I don't know what to do with. (FIXME)
340 * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN
347 /* Fall through to here for unrecognised names, or ones that are
348 * unsupported on this platform */
352 void cleanup_termios(void)
355 tcsetattr(0, TCSANOW
, &orig_termios
);
358 bufchain stdout_data
, stderr_data
;
360 void try_output(int is_stderr
)
362 bufchain
*chain
= (is_stderr ?
&stderr_data
: &stdout_data
);
363 int fd
= (is_stderr ?
2 : 1);
367 if (bufchain_size(chain
) == 0)
370 bufchain_prefix(chain
, &senddata
, &sendlen
);
371 ret
= write(fd
, senddata
, sendlen
);
373 bufchain_consume(chain
, ret
);
375 perror(is_stderr ?
"stderr: write" : "stdout: write");
380 int from_backend(void *frontend_handle
, int is_stderr
,
381 const char *data
, int len
)
386 bufchain_add(&stderr_data
, data
, len
);
389 bufchain_add(&stdout_data
, data
, len
);
393 osize
= bufchain_size(&stdout_data
);
394 esize
= bufchain_size(&stderr_data
);
396 return osize
+ esize
;
399 int from_backend_untrusted(void *frontend_handle
, const char *data
, int len
)
402 * No "untrusted" output should get here (the way the code is
403 * currently, it's all diverted by FLAG_STDERR).
405 assert(!"Unexpected call to from_backend_untrusted()");
406 return 0; /* not reached */
409 int get_userpass_input(prompts_t
*p
, unsigned char *in
, int inlen
)
412 ret
= cmdline_get_passwd_input(p
, in
, inlen
);
414 ret
= console_get_userpass_input(p
, in
, inlen
);
419 * Handle data from a local tty in PARMRK format.
421 static void from_tty(void *buf
, unsigned len
)
424 static enum {NORMAL
, FF
, FF00
} state
= NORMAL
;
426 p
= buf
; end
= buf
+ len
;
434 q
= memchr(p
, '\xff', end
- p
);
435 if (q
== NULL
) q
= end
;
436 back
->send(backhandle
, p
, q
- p
);
442 back
->send(backhandle
, p
, 1);
445 } else if (*p
== '\0') {
452 back
->special(backhandle
, TS_BRK
);
455 * Pretend that PARMRK wasn't set. This involves
456 * faking what INPCK and IGNPAR would have done if
457 * we hadn't overridden them. Unfortunately, we
458 * can't do this entirely correctly because INPCK
459 * distinguishes between framing and parity
460 * errors, but PARMRK format represents both in
461 * the same way. We assume that parity errors are
462 * more common than framing errors, and hence
463 * treat all input errors as being subject to
466 if (orig_termios
.c_iflag
& INPCK
) {
467 /* If IGNPAR is set, we throw away the character. */
468 if (!(orig_termios
.c_iflag
& IGNPAR
)) {
469 /* PE/FE get passed on as NUL. */
471 back
->send(backhandle
, p
, 1);
474 /* INPCK not set. Assume we got a parity error. */
475 back
->send(backhandle
, p
, 1);
486 void sigwinch(int signum
)
488 write(signalpipe
[1], "x", 1);
492 * In Plink our selects are synchronous, so these functions are
495 int uxsel_input_add(int fd
, int rwx
) { return 0; }
496 void uxsel_input_remove(int id
) { }
499 * Short description of parameters.
501 static void usage(void)
503 printf("PuTTY Link: command-line connection utility\n");
505 printf("Usage: plink [options] [user@]host [command]\n");
506 printf(" (\"host\" can also be a PuTTY saved session name)\n");
507 printf("Options:\n");
508 printf(" -V print version information and exit\n");
509 printf(" -pgpfp print PGP key fingerprints and exit\n");
510 printf(" -v show verbose messages\n");
511 printf(" -load sessname Load settings from saved session\n");
512 printf(" -ssh -telnet -rlogin -raw\n");
513 printf(" force use of a particular protocol\n");
514 printf(" -P port connect to specified port\n");
515 printf(" -l user connect with specified username\n");
516 printf(" -batch disable all interactive prompts\n");
517 printf("The following options only apply to SSH connections:\n");
518 printf(" -pw passw login with specified password\n");
519 printf(" -D [listen-IP:]listen-port\n");
520 printf(" Dynamic SOCKS-based port forwarding\n");
521 printf(" -L [listen-IP:]listen-port:host:port\n");
522 printf(" Forward local port to remote address\n");
523 printf(" -R [listen-IP:]listen-port:host:port\n");
524 printf(" Forward remote port to local address\n");
525 printf(" -X -x enable / disable X11 forwarding\n");
526 printf(" -A -a enable / disable agent forwarding\n");
527 printf(" -t -T enable / disable pty allocation\n");
528 printf(" -1 -2 force use of particular protocol version\n");
529 printf(" -4 -6 force use of IPv4 or IPv6\n");
530 printf(" -C enable compression\n");
531 printf(" -i key private key file for authentication\n");
532 printf(" -noagent disable use of Pageant\n");
533 printf(" -agent enable use of Pageant\n");
534 printf(" -m file read remote command(s) from file\n");
535 printf(" -s remote command is an SSH subsystem (SSH-2 only)\n");
536 printf(" -N don't start a shell/command (SSH-2 only)\n");
537 printf(" -nc host:port\n");
538 printf(" open tunnel in place of session (SSH-2 only)\n");
542 static void version(void)
544 printf("plink: %s\n", ver
);
548 int main(int argc
, char **argv
)
554 int i
, fdcount
, fdsize
, fdstate
;
558 int use_subsystem
= 0;
559 void *ldisc
, *logctx
;
563 fdcount
= fdsize
= 0;
565 * Initialise port and protocol to sensible defaults. (These
566 * will be overridden by more or less anything.)
568 default_protocol
= PROT_SSH
;
573 * Process the command line.
575 do_defaults(NULL
, &cfg
);
576 loaded_session
= FALSE
;
577 default_protocol
= cfg
.protocol
;
578 default_port
= cfg
.port
;
582 * Override the default protocol if PLINK_PROTOCOL is set.
584 char *p
= getenv("PLINK_PROTOCOL");
587 for (i
= 0; backends
[i
].backend
!= NULL
; i
++) {
588 if (!strcmp(backends
[i
].name
, p
)) {
589 default_protocol
= cfg
.protocol
= backends
[i
].protocol
;
590 default_port
= cfg
.port
=
591 backends
[i
].backend
->default_port
;
600 int ret
= cmdline_process_param(p
, (argc
> 1 ? argv
[1] : NULL
),
604 "plink: option \"%s\" requires an argument\n", p
);
606 } else if (ret
== 2) {
608 } else if (ret
== 1) {
610 } else if (!strcmp(p
, "-batch")) {
611 console_batch_mode
= 1;
612 } else if (!strcmp(p
, "-s")) {
613 /* Save status to write to cfg later. */
615 } else if (!strcmp(p
, "-V")) {
617 } else if (!strcmp(p
, "-pgpfp")) {
620 } else if (!strcmp(p
, "-o")) {
623 "plink: option \"-o\" requires an argument\n");
627 provide_xrm_string(*++argv
);
630 fprintf(stderr
, "plink: unknown option \"%s\"\n", p
);
634 if (!cfg_launchable(&cfg
)) {
638 * If the hostname starts with "telnet:", set the
639 * protocol to Telnet and process the string as a
642 if (!strncmp(q
, "telnet:", 7)) {
646 if (q
[0] == '/' && q
[1] == '/')
648 cfg
.protocol
= PROT_TELNET
;
650 while (*p
&& *p
!= ':' && *p
!= '/')
659 strncpy(cfg
.host
, q
, sizeof(cfg
.host
) - 1);
660 cfg
.host
[sizeof(cfg
.host
) - 1] = '\0';
662 char *r
, *user
, *host
;
664 * Before we process the [user@]host string, we
665 * first check for the presence of a protocol
666 * prefix (a protocol name followed by ",").
671 for (i
= 0; backends
[i
].backend
!= NULL
; i
++) {
672 j
= strlen(backends
[i
].name
);
674 !memcmp(backends
[i
].name
, p
, j
)) {
675 default_protocol
= cfg
.protocol
=
676 backends
[i
].protocol
;
678 backends
[i
].backend
->default_port
;
686 * A nonzero length string followed by an @ is treated
687 * as a username. (We discount an _initial_ @.) The
688 * rest of the string (or the whole string if no @)
689 * is treated as a session name and/or hostname.
693 p
++, r
= NULL
; /* discount initial @ */
698 user
= NULL
, host
= p
;
702 * Now attempt to load a saved session with the
703 * same name as the hostname.
707 do_defaults(host
, &cfg2
);
708 if (loaded_session
|| !cfg_launchable(&cfg2
)) {
709 /* No settings for this host; use defaults */
710 /* (or session was already loaded with -load) */
711 strncpy(cfg
.host
, host
, sizeof(cfg
.host
) - 1);
712 cfg
.host
[sizeof(cfg
.host
) - 1] = '\0';
713 cfg
.port
= default_port
;
720 /* Patch in specified username. */
721 strncpy(cfg
.username
, user
,
722 sizeof(cfg
.username
) - 1);
723 cfg
.username
[sizeof(cfg
.username
) - 1] = '\0';
730 cmdlen
= cmdsize
= 0;
735 if (cmdlen
>= cmdsize
) {
736 cmdsize
= cmdlen
+ 512;
737 command
= sresize(command
, cmdsize
, char);
739 command
[cmdlen
++]=*p
++;
741 if (cmdlen
>= cmdsize
) {
742 cmdsize
= cmdlen
+ 512;
743 command
= sresize(command
, cmdsize
, char);
745 command
[cmdlen
++]=' '; /* always add trailing space */
746 if (--argc
) p
= *++argv
;
748 if (cmdlen
) command
[--cmdlen
]='\0';
749 /* change trailing blank to NUL */
750 cfg
.remote_cmd_ptr
= command
;
751 cfg
.remote_cmd_ptr2
= NULL
;
752 cfg
.nopty
= TRUE
; /* command => no terminal */
754 break; /* done with cmdline */
762 if (!cfg_launchable(&cfg
)) {
767 * Trim leading whitespace off the hostname if it's there.
770 int space
= strspn(cfg
.host
, " \t");
771 memmove(cfg
.host
, cfg
.host
+space
, 1+strlen(cfg
.host
)-space
);
774 /* See if host is of the form user@host */
775 if (cfg
.host
[0] != '\0') {
776 char *atsign
= strrchr(cfg
.host
, '@');
777 /* Make sure we're not overflowing the user field */
779 if (atsign
- cfg
.host
< sizeof cfg
.username
) {
780 strncpy(cfg
.username
, cfg
.host
, atsign
- cfg
.host
);
781 cfg
.username
[atsign
- cfg
.host
] = '\0';
783 memmove(cfg
.host
, atsign
+ 1, 1 + strlen(atsign
+ 1));
788 * Perform command-line overrides on session configuration.
790 cmdline_run_saved(&cfg
);
793 * Apply subsystem status.
796 cfg
.ssh_subsys
= TRUE
;
799 * Trim a colon suffix off the hostname if it's there.
801 cfg
.host
[strcspn(cfg
.host
, ":")] = '\0';
804 * Remove any remaining whitespace from the hostname.
808 while (cfg
.host
[p2
] != '\0') {
809 if (cfg
.host
[p2
] != ' ' && cfg
.host
[p2
] != '\t') {
810 cfg
.host
[p1
] = cfg
.host
[p2
];
818 if (!cfg
.remote_cmd_ptr
&& !*cfg
.remote_cmd
&& !*cfg
.ssh_nc_host
)
819 flags
|= FLAG_INTERACTIVE
;
822 * Select protocol. This is farmed out into a table in a
823 * separate file to enable an ssh-free variant.
828 for (i
= 0; backends
[i
].backend
!= NULL
; i
++)
829 if (backends
[i
].protocol
== cfg
.protocol
) {
830 back
= backends
[i
].backend
;
835 "Internal fault: Unsupported protocol found\n");
843 if (portnumber
!= -1)
844 cfg
.port
= portnumber
;
847 * Set up the pipe we'll use to tell us about SIGWINCH.
849 if (pipe(signalpipe
) < 0) {
853 putty_signal(SIGWINCH
, sigwinch
);
859 * Start up the connection.
861 logctx
= log_init(NULL
, &cfg
);
862 console_provide_logctx(logctx
);
866 /* nodelay is only useful if stdin is a terminal device */
867 int nodelay
= cfg
.tcp_nodelay
&& isatty(0);
869 error
= back
->init(NULL
, &backhandle
, &cfg
, cfg
.host
, cfg
.port
,
870 &realhost
, nodelay
, cfg
.tcp_keepalives
);
872 fprintf(stderr
, "Unable to open connection:\n%s\n", error
);
875 back
->provide_logctx(backhandle
, logctx
);
876 ldisc
= ldisc_create(&cfg
, NULL
, back
, backhandle
, NULL
);
882 * Set up the initial console mode. We don't care if this call
883 * fails, because we know we aren't necessarily running in a
886 local_tty
= (tcgetattr(0, &orig_termios
) == 0);
887 atexit(cleanup_termios
);
888 ldisc_update(NULL
, 1, 1);
890 now
= GETTICKCOUNT();
893 fd_set rset
, wset
, xset
;
903 FD_SET_MAX(signalpipe
[0], maxfd
, rset
);
905 if (connopen
&& !sending
&&
906 back
->connected(backhandle
) &&
907 back
->sendok(backhandle
) &&
908 back
->sendbuffer(backhandle
) < MAX_STDIN_BACKLOG
) {
909 /* If we're OK to send, then try to read from stdin. */
910 FD_SET_MAX(0, maxfd
, rset
);
913 if (bufchain_size(&stdout_data
) > 0) {
914 /* If we have data for stdout, try to write to stdout. */
915 FD_SET_MAX(1, maxfd
, wset
);
918 if (bufchain_size(&stderr_data
) > 0) {
919 /* If we have data for stderr, try to write to stderr. */
920 FD_SET_MAX(2, maxfd
, wset
);
923 /* Count the currently active fds. */
925 for (fd
= first_fd(&fdstate
, &rwx
); fd
>= 0;
926 fd
= next_fd(&fdstate
, &rwx
)) i
++;
928 /* Expand the fdlist buffer if necessary. */
931 fdlist
= sresize(fdlist
, fdsize
, int);
935 * Add all currently open fds to the select sets, and store
936 * them in fdlist as well.
939 for (fd
= first_fd(&fdstate
, &rwx
); fd
>= 0;
940 fd
= next_fd(&fdstate
, &rwx
)) {
941 fdlist
[fdcount
++] = fd
;
943 FD_SET_MAX(fd
, maxfd
, rset
);
945 FD_SET_MAX(fd
, maxfd
, wset
);
947 FD_SET_MAX(fd
, maxfd
, xset
);
952 struct timeval tv
, *ptv
;
954 if (run_timers(now
, &next
)) {
955 ticks
= next
- GETTICKCOUNT();
956 if (ticks
< 0) ticks
= 0; /* just in case */
957 tv
.tv_sec
= ticks
/ 1000;
958 tv
.tv_usec
= ticks
% 1000 * 1000;
963 ret
= select(maxfd
, &rset
, &wset
, &xset
, ptv
);
967 long newnow
= GETTICKCOUNT();
969 * Check to see whether the system clock has
970 * changed massively during the select.
972 if (newnow
- now
< 0 || newnow
- now
> next
- now
) {
974 * If so, look at the elapsed time in the
975 * select and use it to compute a new
978 long othernow
= now
+ tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
979 /* So we'd like GETTICKCOUNT to have returned othernow,
980 * but instead it return newnow. Hence ... */
981 tickcount_offset
+= othernow
- newnow
;
987 } while (ret
< 0 && errno
== EINTR
);
994 for (i
= 0; i
< fdcount
; i
++) {
997 * We must process exceptional notifications before
998 * ordinary readability ones, or we may go straight
999 * past the urgent marker.
1001 if (FD_ISSET(fd
, &xset
))
1002 select_result(fd
, 4);
1003 if (FD_ISSET(fd
, &rset
))
1004 select_result(fd
, 1);
1005 if (FD_ISSET(fd
, &wset
))
1006 select_result(fd
, 2);
1009 if (FD_ISSET(signalpipe
[0], &rset
)) {
1011 struct winsize size
;
1012 read(signalpipe
[0], c
, 1); /* ignore its value; it'll be `x' */
1013 if (ioctl(0, TIOCGWINSZ
, (void *)&size
) >= 0)
1014 back
->size(backhandle
, size
.ws_col
, size
.ws_row
);
1017 if (FD_ISSET(0, &rset
)) {
1021 if (connopen
&& back
->connected(backhandle
)) {
1022 ret
= read(0, buf
, sizeof(buf
));
1024 perror("stdin: read");
1026 } else if (ret
== 0) {
1027 back
->special(backhandle
, TS_EOF
);
1028 sending
= FALSE
; /* send nothing further after this */
1033 back
->send(backhandle
, buf
, ret
);
1038 if (FD_ISSET(1, &wset
)) {
1042 if (FD_ISSET(2, &wset
)) {
1046 if ((!connopen
|| !back
->connected(backhandle
)) &&
1047 bufchain_size(&stdout_data
) == 0 &&
1048 bufchain_size(&stderr_data
) == 0)
1049 break; /* we closed the connection */
1051 exitcode
= back
->exitcode(backhandle
);
1053 fprintf(stderr
, "Remote process exit code unavailable\n");
1054 exitcode
= 1; /* this is an error condition */
1056 cleanup_exit(exitcode
);
1057 return exitcode
; /* shouldn't happen, but placates gcc */