diff options
Diffstat (limited to 'UNIX/UXPLINK.C')
| -rw-r--r-- | UNIX/UXPLINK.C | 966 |
1 files changed, 0 insertions, 966 deletions
diff --git a/UNIX/UXPLINK.C b/UNIX/UXPLINK.C deleted file mode 100644 index 240783f4..00000000 --- a/UNIX/UXPLINK.C +++ /dev/null @@ -1,966 +0,0 @@ -/* - * PLink - a command-line (stdin/stdout) variant of PuTTY. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <errno.h> -#include <assert.h> -#include <stdarg.h> -#include <signal.h> -#include <unistd.h> -#include <fcntl.h> -#include <termios.h> -#include <pwd.h> -#include <sys/ioctl.h> -#include <sys/time.h> - -#include "putty.h" -#include "ssh.h" -#include "storage.h" -#include "tree234.h" - -#define MAX_STDIN_BACKLOG 4096 - -static LogContext *logctx; - -static struct termios orig_termios; - -void cmdline_error(const char *fmt, ...) -{ - va_list ap; - va_start(ap, fmt); - console_print_error_msg_fmt_v("plink", fmt, ap); - va_end(ap); - exit(1); -} - -static bool local_tty = false; /* do we have a local tty? */ - -static Backend *backend; -static Conf *conf; - -/* - * Default settings that are specific to Unix plink. - */ -char *platform_default_s(const char *name) -{ - if (!strcmp(name, "TermType")) - return dupstr(getenv("TERM")); - if (!strcmp(name, "SerialLine")) - return dupstr("/dev/ttyS0"); - return NULL; -} - -bool platform_default_b(const char *name, bool def) -{ - return def; -} - -int platform_default_i(const char *name, int def) -{ - return def; -} - -FontSpec *platform_default_fontspec(const char *name) -{ - return fontspec_new(""); -} - -Filename *platform_default_filename(const char *name) -{ - if (!strcmp(name, "LogFileName")) - return filename_from_str("putty.log"); - else - return filename_from_str(""); -} - -char *x_get_default(const char *key) -{ - return NULL; /* this is a stub */ -} -static void plink_echoedit_update(Seat *seat, bool echo, bool edit) -{ - /* Update stdin read mode to reflect changes in line discipline. */ - struct termios mode; - - if (!local_tty) return; - - mode = orig_termios; - - if (echo) - mode.c_lflag |= ECHO; - else - mode.c_lflag &= ~ECHO; - - if (edit) { - mode.c_iflag |= ICRNL; - mode.c_lflag |= ISIG | ICANON; - mode.c_oflag |= OPOST; - } else { - mode.c_iflag &= ~ICRNL; - mode.c_lflag &= ~(ISIG | ICANON); - mode.c_oflag &= ~OPOST; - /* Solaris sets these to unhelpful values */ - mode.c_cc[VMIN] = 1; - mode.c_cc[VTIME] = 0; - /* FIXME: perhaps what we do with IXON/IXOFF should be an - * argument to the echoedit_update() method, to allow - * implementation of SSH-2 "xon-xoff" and Rlogin's - * equivalent? */ - mode.c_iflag &= ~IXON; - mode.c_iflag &= ~IXOFF; - } - /* - * Mark parity errors and (more important) BREAK on input. This - * is more complex than it need be because POSIX-2001 suggests - * that escaping of valid 0xff in the input stream is dependent on - * IGNPAR being clear even though marking of BREAK isn't. NetBSD - * 2.0 goes one worse and makes it dependent on INPCK too. We - * deal with this by forcing these flags into a useful state and - * then faking the state in which we found them in from_tty() if - * we get passed a parity or framing error. - */ - mode.c_iflag = (mode.c_iflag | INPCK | PARMRK) & ~IGNPAR; - - tcsetattr(STDIN_FILENO, TCSANOW, &mode); -} - -/* Helper function to extract a special character from a termios. */ -static char *get_ttychar(struct termios *t, int index) -{ - cc_t c = t->c_cc[index]; -#if defined(_POSIX_VDISABLE) - if (c == _POSIX_VDISABLE) - return dupstr(""); -#endif - return dupprintf("^<%d>", c); -} - -static char *plink_get_ttymode(Seat *seat, const char *mode) -{ - /* - * Propagate appropriate terminal modes from the local terminal, - * if any. - */ - if (!local_tty) return NULL; - -#define GET_CHAR(ourname, uxname) \ - do { \ - if (strcmp(mode, ourname) == 0) \ - return get_ttychar(&orig_termios, uxname); \ - } while(0) -#define GET_BOOL(ourname, uxname, uxmemb, transform) \ - do { \ - if (strcmp(mode, ourname) == 0) { \ - bool b = (orig_termios.uxmemb & uxname) != 0; \ - transform; \ - return dupprintf("%d", b); \ - } \ - } while (0) - - /* - * Modes that want to be the same on all terminal devices involved. - */ - /* All the special characters supported by SSH */ -#if defined(VINTR) - GET_CHAR("INTR", VINTR); -#endif -#if defined(VQUIT) - GET_CHAR("QUIT", VQUIT); -#endif -#if defined(VERASE) - GET_CHAR("ERASE", VERASE); -#endif -#if defined(VKILL) - GET_CHAR("KILL", VKILL); -#endif -#if defined(VEOF) - GET_CHAR("EOF", VEOF); -#endif -#if defined(VEOL) - GET_CHAR("EOL", VEOL); -#endif -#if defined(VEOL2) - GET_CHAR("EOL2", VEOL2); -#endif -#if defined(VSTART) - GET_CHAR("START", VSTART); -#endif -#if defined(VSTOP) - GET_CHAR("STOP", VSTOP); -#endif -#if defined(VSUSP) - GET_CHAR("SUSP", VSUSP); -#endif -#if defined(VDSUSP) - GET_CHAR("DSUSP", VDSUSP); -#endif -#if defined(VREPRINT) - GET_CHAR("REPRINT", VREPRINT); -#endif -#if defined(VWERASE) - GET_CHAR("WERASE", VWERASE); -#endif -#if defined(VLNEXT) - GET_CHAR("LNEXT", VLNEXT); -#endif -#if defined(VFLUSH) - GET_CHAR("FLUSH", VFLUSH); -#endif -#if defined(VSWTCH) - GET_CHAR("SWTCH", VSWTCH); -#endif -#if defined(VSTATUS) - GET_CHAR("STATUS", VSTATUS); -#endif -#if defined(VDISCARD) - GET_CHAR("DISCARD", VDISCARD); -#endif - /* Modes that "configure" other major modes. These should probably be - * considered as user preferences. */ - /* Configuration of ICANON */ -#if defined(ECHOK) - GET_BOOL("ECHOK", ECHOK, c_lflag, ); -#endif -#if defined(ECHOKE) - GET_BOOL("ECHOKE", ECHOKE, c_lflag, ); -#endif -#if defined(ECHOE) - GET_BOOL("ECHOE", ECHOE, c_lflag, ); -#endif -#if defined(ECHONL) - GET_BOOL("ECHONL", ECHONL, c_lflag, ); -#endif -#if defined(XCASE) - GET_BOOL("XCASE", XCASE, c_lflag, ); -#endif -#if defined(IUTF8) - GET_BOOL("IUTF8", IUTF8, c_iflag, ); -#endif - /* Configuration of ECHO */ -#if defined(ECHOCTL) - GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, ); -#endif - /* Configuration of IXON/IXOFF */ -#if defined(IXANY) - GET_BOOL("IXANY", IXANY, c_iflag, ); -#endif - /* Configuration of OPOST */ -#if defined(OLCUC) - GET_BOOL("OLCUC", OLCUC, c_oflag, ); -#endif -#if defined(ONLCR) - GET_BOOL("ONLCR", ONLCR, c_oflag, ); -#endif -#if defined(OCRNL) - GET_BOOL("OCRNL", OCRNL, c_oflag, ); -#endif -#if defined(ONOCR) - GET_BOOL("ONOCR", ONOCR, c_oflag, ); -#endif -#if defined(ONLRET) - GET_BOOL("ONLRET", ONLRET, c_oflag, ); -#endif - - /* - * Modes that want to be set in only one place, and that we have - * squashed locally. - */ -#if defined(ISIG) - GET_BOOL("ISIG", ISIG, c_lflag, ); -#endif -#if defined(ICANON) - GET_BOOL("ICANON", ICANON, c_lflag, ); -#endif -#if defined(ECHO) - GET_BOOL("ECHO", ECHO, c_lflag, ); -#endif -#if defined(IXON) - GET_BOOL("IXON", IXON, c_iflag, ); -#endif -#if defined(IXOFF) - GET_BOOL("IXOFF", IXOFF, c_iflag, ); -#endif -#if defined(OPOST) - GET_BOOL("OPOST", OPOST, c_oflag, ); -#endif - - /* - * We do not propagate the following modes: - * - Parity/serial settings, which are a local affair and don't - * make sense propagated over SSH's 8-bit byte-stream. - * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD - * - Things that want to be enabled in one place that we don't - * squash locally. - * IUCLC - * - Status bits. - * PENDIN - * - Things I don't know what to do with. (FIXME) - * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN - * INLCR IGNCR ICRNL - */ - -#undef GET_CHAR -#undef GET_BOOL - - /* Fall through to here for unrecognised names, or ones that are - * unsupported on this platform */ - return NULL; -} - -void cleanup_termios(void) -{ - if (local_tty) - tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios); -} - -static bufchain stdout_data, stderr_data; -static bufchain_sink stdout_bcs, stderr_bcs; -static StripCtrlChars *stdout_scc, *stderr_scc; -static BinarySink *stdout_bs, *stderr_bs; - -static enum { EOF_NO, EOF_PENDING, EOF_SENT } outgoingeof; - -size_t try_output(bool is_stderr) -{ - bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); - int fd = (is_stderr ? STDERR_FILENO : STDOUT_FILENO); - ssize_t ret; - - if (bufchain_size(chain) > 0) { - bool prev_nonblock = nonblock(fd); - ptrlen senddata; - do { - senddata = bufchain_prefix(chain); - ret = write(fd, senddata.ptr, senddata.len); - if (ret > 0) - bufchain_consume(chain, ret); - } while (ret == senddata.len && bufchain_size(chain) != 0); - if (!prev_nonblock) - no_nonblock(fd); - if (ret < 0 && errno != EAGAIN) { - perror(is_stderr ? "stderr: write" : "stdout: write"); - exit(1); - } - } - if (outgoingeof == EOF_PENDING && bufchain_size(&stdout_data) == 0) { - close(STDOUT_FILENO); - outgoingeof = EOF_SENT; - } - return bufchain_size(&stdout_data) + bufchain_size(&stderr_data); -} - -static size_t plink_output( - Seat *seat, bool is_stderr, const void *data, size_t len) -{ - assert(is_stderr || outgoingeof == EOF_NO); - - BinarySink *bs = is_stderr ? stderr_bs : stdout_bs; - put_data(bs, data, len); - - return try_output(is_stderr); -} - -static bool plink_eof(Seat *seat) -{ - assert(outgoingeof == EOF_NO); - outgoingeof = EOF_PENDING; - try_output(false); - return false; /* do not respond to incoming EOF with outgoing */ -} - -static int plink_get_userpass_input(Seat *seat, prompts_t *p, bufchain *input) -{ - int ret; - ret = cmdline_get_passwd_input(p); - if (ret == -1) - ret = console_get_userpass_input(p); - return ret; -} - -static bool plink_seat_interactive(Seat *seat) -{ - return (!*conf_get_str(conf, CONF_remote_cmd) && - !*conf_get_str(conf, CONF_remote_cmd2) && - !*conf_get_str(conf, CONF_ssh_nc_host)); -} - -static const SeatVtable plink_seat_vt = { - .output = plink_output, - .eof = plink_eof, - .get_userpass_input = plink_get_userpass_input, - .notify_remote_exit = nullseat_notify_remote_exit, - .connection_fatal = console_connection_fatal, - .update_specials_menu = nullseat_update_specials_menu, - .get_ttymode = plink_get_ttymode, - .set_busy_status = nullseat_set_busy_status, - .verify_ssh_host_key = console_verify_ssh_host_key, - .confirm_weak_crypto_primitive = console_confirm_weak_crypto_primitive, - .confirm_weak_cached_hostkey = console_confirm_weak_cached_hostkey, - .is_utf8 = nullseat_is_never_utf8, - .echoedit_update = plink_echoedit_update, - .get_x_display = nullseat_get_x_display, - .get_windowid = nullseat_get_windowid, - .get_window_pixel_size = nullseat_get_window_pixel_size, - .stripctrl_new = console_stripctrl_new, - .set_trust_status = console_set_trust_status, - .verbose = cmdline_seat_verbose, - .interactive = plink_seat_interactive, - .get_cursor_position = nullseat_get_cursor_position, -}; -static Seat plink_seat[1] = {{ &plink_seat_vt }}; - -/* - * Handle data from a local tty in PARMRK format. - */ -static void from_tty(void *vbuf, unsigned len) -{ - char *p, *q, *end, *buf = vbuf; - static enum {NORMAL, FF, FF00} state = NORMAL; - - p = buf; end = buf + len; - while (p < end) { - switch (state) { - case NORMAL: - if (*p == '\xff') { - p++; - state = FF; - } else { - q = memchr(p, '\xff', end - p); - if (q == NULL) q = end; - backend_send(backend, p, q - p); - p = q; - } - break; - case FF: - if (*p == '\xff') { - backend_send(backend, p, 1); - p++; - state = NORMAL; - } else if (*p == '\0') { - p++; - state = FF00; - } else abort(); - break; - case FF00: - if (*p == '\0') { - backend_special(backend, SS_BRK, 0); - } else { - /* - * Pretend that PARMRK wasn't set. This involves - * faking what INPCK and IGNPAR would have done if - * we hadn't overridden them. Unfortunately, we - * can't do this entirely correctly because INPCK - * distinguishes between framing and parity - * errors, but PARMRK format represents both in - * the same way. We assume that parity errors are - * more common than framing errors, and hence - * treat all input errors as being subject to - * INPCK. - */ - if (orig_termios.c_iflag & INPCK) { - /* If IGNPAR is set, we throw away the character. */ - if (!(orig_termios.c_iflag & IGNPAR)) { - /* PE/FE get passed on as NUL. */ - *p = 0; - backend_send(backend, p, 1); - } - } else { - /* INPCK not set. Assume we got a parity error. */ - backend_send(backend, p, 1); - } - } - p++; - state = NORMAL; - } - } -} - -static int signalpipe[2]; - -void sigwinch(int signum) -{ - if (write(signalpipe[1], "x", 1) <= 0) - /* not much we can do about it */; -} - -/* - * Short description of parameters. - */ -static void usage(void) -{ - printf("Plink: command-line connection utility\n"); - printf("%s\n", ver); - printf("Usage: plink [options] [user@]host [command]\n"); - printf(" (\"host\" can also be a PuTTY saved session name)\n"); - printf("Options:\n"); - printf(" -V print version information and exit\n"); - printf(" -pgpfp print PGP key fingerprints and exit\n"); - printf(" -v show verbose messages\n"); - printf(" -load sessname Load settings from saved session\n"); - printf(" -ssh -telnet -rlogin -raw -serial\n"); - printf(" force use of a particular protocol\n"); - printf(" -ssh-connection\n"); - printf(" force use of the bare ssh-connection protocol\n"); - printf(" -P port connect to specified port\n"); - printf(" -l user connect with specified username\n"); - printf(" -batch disable all interactive prompts\n"); - printf(" -proxycmd command\n"); - printf(" use 'command' as local proxy\n"); - printf(" -sercfg configuration-string (e.g. 19200,8,n,1,X)\n"); - printf(" Specify the serial configuration (serial only)\n"); - printf("The following options only apply to SSH connections:\n"); - printf(" -pw passw login with specified password\n"); - printf(" -D [listen-IP:]listen-port\n"); - printf(" Dynamic SOCKS-based port forwarding\n"); - printf(" -L [listen-IP:]listen-port:host:port\n"); - printf(" Forward local port to remote address\n"); - printf(" -R [listen-IP:]listen-port:host:port\n"); - printf(" Forward remote port to local address\n"); - printf(" -X -x enable / disable X11 forwarding\n"); - printf(" -A -a enable / disable agent forwarding\n"); - printf(" -t -T enable / disable pty allocation\n"); - printf(" -1 -2 force use of particular SSH protocol version\n"); - printf(" -4 -6 force use of IPv4 or IPv6\n"); - printf(" -C enable compression\n"); - printf(" -i key private key file for user authentication\n"); - printf(" -noagent disable use of Pageant\n"); - printf(" -agent enable use of Pageant\n"); - printf(" -no-trivial-auth\n"); - printf(" disconnect if SSH authentication succeeds trivially\n"); - printf(" -noshare disable use of connection sharing\n"); - printf(" -share enable use of connection sharing\n"); - printf(" -hostkey keyid\n"); - printf(" manually specify a host key (may be repeated)\n"); - printf(" -sanitise-stderr, -sanitise-stdout, " - "-no-sanitise-stderr, -no-sanitise-stdout\n"); - printf(" do/don't strip control chars from standard " - "output/error\n"); - printf(" -no-antispoof omit anti-spoofing prompt after " - "authentication\n"); - printf(" -m file read remote command(s) from file\n"); - printf(" -s remote command is an SSH subsystem (SSH-2 only)\n"); - printf(" -N don't start a shell/command (SSH-2 only)\n"); - printf(" -nc host:port\n"); - printf(" open tunnel in place of session (SSH-2 only)\n"); - printf(" -sshlog file\n"); - printf(" -sshrawlog file\n"); - printf(" log protocol details to a file\n"); - printf(" -logoverwrite\n"); - printf(" -logappend\n"); - printf(" control what happens when a log file already exists\n"); - printf(" -shareexists\n"); - printf(" test whether a connection-sharing upstream exists\n"); - exit(1); -} - -static void version(void) -{ - char *buildinfo_text = buildinfo("\n"); - printf("plink: %s\n%s\n", ver, buildinfo_text); - sfree(buildinfo_text); - exit(0); -} - -void frontend_net_error_pending(void) {} - -const bool share_can_be_downstream = true; -const bool share_can_be_upstream = true; - -const bool buildinfo_gtk_relevant = false; - -const unsigned cmdline_tooltype = - TOOLTYPE_HOST_ARG | - TOOLTYPE_HOST_ARG_CAN_BE_SESSION | - TOOLTYPE_HOST_ARG_PROTOCOL_PREFIX | - TOOLTYPE_HOST_ARG_FROM_LAUNCHABLE_LOAD; - -static bool seen_stdin_eof = false; - -static bool plink_pw_setup(void *vctx, pollwrapper *pw) -{ - pollwrap_add_fd_rwx(pw, signalpipe[0], SELECT_R); - - if (!seen_stdin_eof && - backend_connected(backend) && - backend_sendok(backend) && - backend_sendbuffer(backend) < MAX_STDIN_BACKLOG) { - /* If we're OK to send, then try to read from stdin. */ - pollwrap_add_fd_rwx(pw, STDIN_FILENO, SELECT_R); - } - - if (bufchain_size(&stdout_data) > 0) { - /* If we have data for stdout, try to write to stdout. */ - pollwrap_add_fd_rwx(pw, STDOUT_FILENO, SELECT_W); - } - - if (bufchain_size(&stderr_data) > 0) { - /* If we have data for stderr, try to write to stderr. */ - pollwrap_add_fd_rwx(pw, STDERR_FILENO, SELECT_W); - } - - return true; -} - -static void plink_pw_check(void *vctx, pollwrapper *pw) -{ - if (pollwrap_check_fd_rwx(pw, signalpipe[0], SELECT_R)) { - char c[1]; - struct winsize size; - if (read(signalpipe[0], c, 1) <= 0) - /* ignore error */; - /* ignore its value; it'll be `x' */ - if (ioctl(STDIN_FILENO, TIOCGWINSZ, (void *)&size) >= 0) - backend_size(backend, size.ws_col, size.ws_row); - } - - if (pollwrap_check_fd_rwx(pw, STDIN_FILENO, SELECT_R)) { - char buf[4096]; - int ret; - - if (backend_connected(backend)) { - ret = read(STDIN_FILENO, buf, sizeof(buf)); - noise_ultralight(NOISE_SOURCE_IOLEN, ret); - if (ret < 0) { - perror("stdin: read"); - exit(1); - } else if (ret == 0) { - backend_special(backend, SS_EOF, 0); - seen_stdin_eof = true; - } else { - if (local_tty) - from_tty(buf, ret); - else - backend_send(backend, buf, ret); - } - } - } - - if (pollwrap_check_fd_rwx(pw, STDOUT_FILENO, SELECT_W)) { - backend_unthrottle(backend, try_output(false)); - } - - if (pollwrap_check_fd_rwx(pw, STDERR_FILENO, SELECT_W)) { - backend_unthrottle(backend, try_output(true)); - } -} - -static bool plink_continue(void *vctx, bool found_any_fd, - bool ran_any_callback) -{ - if (!backend_connected(backend) && - bufchain_size(&stdout_data) == 0 && bufchain_size(&stderr_data) == 0) - return false; /* terminate main loop */ - return true; -} - -int main(int argc, char **argv) -{ - int exitcode; - bool errors; - enum TriState sanitise_stdout = AUTO, sanitise_stderr = AUTO; - bool use_subsystem = false; - bool just_test_share_exists = false; - struct winsize size; - const struct BackendVtable *backvt; - - /* - * Initialise port and protocol to sensible defaults. (These - * will be overridden by more or less anything.) - */ - settings_set_default_protocol(PROT_SSH); - settings_set_default_port(22); - - bufchain_init(&stdout_data); - bufchain_init(&stderr_data); - bufchain_sink_init(&stdout_bcs, &stdout_data); - bufchain_sink_init(&stderr_bcs, &stderr_data); - stdout_bs = BinarySink_UPCAST(&stdout_bcs); - stderr_bs = BinarySink_UPCAST(&stderr_bcs); - outgoingeof = EOF_NO; - - stderr_tty_init(); - /* - * Process the command line. - */ - conf = conf_new(); - do_defaults(NULL, conf); - settings_set_default_protocol(conf_get_int(conf, CONF_protocol)); - settings_set_default_port(conf_get_int(conf, CONF_port)); - errors = false; - { - /* - * Override the default protocol if PLINK_PROTOCOL is set. - */ - char *p = getenv("PLINK_PROTOCOL"); - if (p) { - const struct BackendVtable *vt = backend_vt_from_name(p); - if (vt) { - settings_set_default_protocol(vt->protocol); - settings_set_default_port(vt->default_port); - conf_set_int(conf, CONF_protocol, vt->protocol); - conf_set_int(conf, CONF_port, vt->default_port); - } - } - } - while (--argc) { - char *p = *++argv; - int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), - 1, conf); - if (ret == -2) { - fprintf(stderr, - "plink: option \"%s\" requires an argument\n", p); - errors = true; - } else if (ret == 2) { - --argc, ++argv; - } else if (ret == 1) { - continue; - } else if (!strcmp(p, "-batch")) { - console_batch_mode = true; - } else if (!strcmp(p, "-s")) { - /* Save status to write to conf later. */ - use_subsystem = true; - } else if (!strcmp(p, "-V") || !strcmp(p, "--version")) { - version(); - } else if (!strcmp(p, "--help")) { - usage(); - exit(0); - } else if (!strcmp(p, "-pgpfp")) { - pgp_fingerprints(); - exit(1); - } else if (!strcmp(p, "-o")) { - if (argc <= 1) { - fprintf(stderr, - "plink: option \"-o\" requires an argument\n"); - errors = true; - } else { - --argc; - /* Explicitly pass "plink" in place of appname for - * error reporting purposes. appname will have been - * set by be_foo.c to something more generic, probably - * "PuTTY". */ - provide_xrm_string(*++argv, "plink"); - } - } else if (!strcmp(p, "-shareexists")) { - just_test_share_exists = true; - } else if (!strcmp(p, "-fuzznet")) { - conf_set_int(conf, CONF_proxy_type, PROXY_FUZZ); - conf_set_str(conf, CONF_proxy_telnet_command, "%host"); - } else if (!strcmp(p, "-sanitise-stdout") || - !strcmp(p, "-sanitize-stdout")) { - sanitise_stdout = FORCE_ON; - } else if (!strcmp(p, "-no-sanitise-stdout") || - !strcmp(p, "-no-sanitize-stdout")) { - sanitise_stdout = FORCE_OFF; - } else if (!strcmp(p, "-sanitise-stderr") || - !strcmp(p, "-sanitize-stderr")) { - sanitise_stderr = FORCE_ON; - } else if (!strcmp(p, "-no-sanitise-stderr") || - !strcmp(p, "-no-sanitize-stderr")) { - sanitise_stderr = FORCE_OFF; - } else if (!strcmp(p, "-no-antispoof")) { - console_antispoof_prompt = false; - } else if (*p != '-') { - strbuf *cmdbuf = strbuf_new(); - - while (argc > 0) { - if (cmdbuf->len > 0) - put_byte(cmdbuf, ' '); /* add space separator */ - put_datapl(cmdbuf, ptrlen_from_asciz(p)); - if (--argc > 0) - p = *++argv; - } - - conf_set_str(conf, CONF_remote_cmd, cmdbuf->s); - conf_set_str(conf, CONF_remote_cmd2, ""); - conf_set_bool(conf, CONF_nopty, true); /* command => no tty */ - - strbuf_free(cmdbuf); - break; /* done with cmdline */ - } else { - fprintf(stderr, "plink: unknown option \"%s\"\n", p); - errors = true; - } - } - - if (errors) - return 1; - - if (!cmdline_host_ok(conf)) { - usage(); - } - - prepare_session(conf); - - /* - * Perform command-line overrides on session configuration. - */ - cmdline_run_saved(conf); - - /* - * If we have no better ideas for the remote username, use the local - * one, as 'ssh' does. - */ - if (conf_get_str(conf, CONF_username)[0] == '\0') { - char *user = get_username(); - if (user) { - conf_set_str(conf, CONF_username, user); - sfree(user); - } - } - - /* - * Apply subsystem status. - */ - if (use_subsystem) - conf_set_bool(conf, CONF_ssh_subsys, true); - - /* - * Select protocol. This is farmed out into a table in a - * separate file to enable an ssh-free variant. - */ - backvt = backend_vt_from_proto(conf_get_int(conf, CONF_protocol)); - if (!backvt) { - fprintf(stderr, - "Internal fault: Unsupported protocol found\n"); - return 1; - } - - if (backvt->flags & BACKEND_NEEDS_TERMINAL) { - fprintf(stderr, - "Plink doesn't support %s, which needs terminal emulation\n", - backvt->displayname); - return 1; - } - - /* - * Block SIGPIPE, so that we'll get EPIPE individually on - * particular network connections that go wrong. - */ - putty_signal(SIGPIPE, SIG_IGN); - - /* - * Set up the pipe we'll use to tell us about SIGWINCH. - */ - if (pipe(signalpipe) < 0) { - perror("pipe"); - exit(1); - } - /* We don't want the signal handler to block if the pipe's full. */ - nonblock(signalpipe[0]); - nonblock(signalpipe[1]); - cloexec(signalpipe[0]); - cloexec(signalpipe[1]); - putty_signal(SIGWINCH, sigwinch); - - /* - * Now that we've got the SIGWINCH handler installed, try to find - * out the initial terminal size. - */ - if (ioctl(STDIN_FILENO, TIOCGWINSZ, &size) >= 0) { - conf_set_int(conf, CONF_width, size.ws_col); - conf_set_int(conf, CONF_height, size.ws_row); - } - - /* - * Decide whether to sanitise control sequences out of standard - * output and standard error. - * - * If we weren't given a command-line override, we do this if (a) - * the fd in question is pointing at a terminal, and (b) we aren't - * trying to allocate a terminal as part of the session. - * - * (Rationale: the risk of control sequences is that they cause - * confusion when sent to a local terminal, so if there isn't one, - * no problem. Also, if we allocate a remote terminal, then we - * sent a terminal type, i.e. we told it what kind of escape - * sequences we _like_, i.e. we were expecting to receive some.) - */ - if (sanitise_stdout == FORCE_ON || - (sanitise_stdout == AUTO && isatty(STDOUT_FILENO) && - conf_get_bool(conf, CONF_nopty))) { - stdout_scc = stripctrl_new(stdout_bs, true, L'\0'); - stdout_bs = BinarySink_UPCAST(stdout_scc); - } - if (sanitise_stderr == FORCE_ON || - (sanitise_stderr == AUTO && isatty(STDERR_FILENO) && - conf_get_bool(conf, CONF_nopty))) { - stderr_scc = stripctrl_new(stderr_bs, true, L'\0'); - stderr_bs = BinarySink_UPCAST(stderr_scc); - } - - sk_init(); - uxsel_init(); - - /* - * Plink doesn't provide any way to add forwardings after the - * connection is set up, so if there are none now, we can safely set - * the "simple" flag. - */ - if (conf_get_int(conf, CONF_protocol) == PROT_SSH && - !conf_get_bool(conf, CONF_x11_forward) && - !conf_get_bool(conf, CONF_agentfwd) && - !conf_get_str_nthstrkey(conf, CONF_portfwd, 0)) - conf_set_bool(conf, CONF_ssh_simple, true); - - if (just_test_share_exists) { - if (!backvt->test_for_upstream) { - fprintf(stderr, "Connection sharing not supported for this " - "connection type (%s)'\n", backvt->displayname); - return 1; - } - if (backvt->test_for_upstream(conf_get_str(conf, CONF_host), - conf_get_int(conf, CONF_port), conf)) - return 0; - else - return 1; - } - - /* - * Start up the connection. - */ - logctx = log_init(console_cli_logpolicy, conf); - { - char *error, *realhost; - /* nodelay is only useful if stdin is a terminal device */ - bool nodelay = conf_get_bool(conf, CONF_tcp_nodelay) && isatty(0); - - /* This is a good place for a fuzzer to fork us. */ -#ifdef __AFL_HAVE_MANUAL_CONTROL - __AFL_INIT(); -#endif - - error = backend_init(backvt, plink_seat, &backend, logctx, conf, - conf_get_str(conf, CONF_host), - conf_get_int(conf, CONF_port), - &realhost, nodelay, - conf_get_bool(conf, CONF_tcp_keepalives)); - if (error) { - fprintf(stderr, "Unable to open connection:\n%s\n", error); - sfree(error); - return 1; - } - ldisc_create(conf, NULL, backend, plink_seat); - sfree(realhost); - } - - /* - * Set up the initial console mode. We don't care if this call - * fails, because we know we aren't necessarily running in a - * console. - */ - local_tty = (tcgetattr(STDIN_FILENO, &orig_termios) == 0); - atexit(cleanup_termios); - seat_echoedit_update(plink_seat, 1, 1); - - cli_main_loop(plink_pw_setup, plink_pw_check, plink_continue, NULL); - - exitcode = backend_exitcode(backend); - if (exitcode < 0) { - fprintf(stderr, "Remote process exit code unavailable\n"); - exitcode = 1; /* this is an error condition */ - } - cleanup_exit(exitcode); - return exitcode; /* shouldn't happen, but placates gcc */ -} |