/* * Copyright (c) 1988, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if 0 static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 5/30/95"; #endif #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include "ring.h" #include "externs.h" #include "defines.h" /* These values need to be the same as defined in libtelnet/kerberos5.c */ /* Either define them in both places, or put in some common header file. */ #define OPTS_FORWARD_CREDS 0x00000002 #define OPTS_FORWARDABLE_CREDS 0x00000001 #if 0 #define FORWARD #endif /* * Initialize variables. */ void tninit() { init_terminal(); init_network(); init_telnet(); init_sys(); #if defined(TN3270) init_3270(); #endif } #define USAGE "Usage: %s [OPTION...] [HOST [PORT]]\n" /* Print a help message describing all options to STDOUT and exit with a status of 0. */ static void help () { fprintf (stdout, USAGE, prompt); puts ("Login to remote system HOST (optionally, on service port PORT)\n\n\ -4, --ipv4 Use only IPv4\n\ -6, --ipv6 Use only IPv6\n\ -8, --binary Use an 8-bit data path\n\ -a, --login Attempt automatic login\n\ -c, --no-rc Don't read the user's .telnetrc file\n\ -d, --debug Turn on debugging\n\ -e CHAR, --escape=CHAR Use CHAR as an escape character\n\ -E, --no-escape Use no escape character\n\ -K, --no-login Don't automatically login to the remote system\n\ -l USER, --user=USER Attempt automatic login as USER\n\ -L, --binary-output Use an 8-bit data path for output only\n\ -n FILE, --trace=FILE Record trace information into FILE\n\ -r, --rlogin Use a user-interface similar to rlogin\n\ -X ATYPE, --disable-auth=ATYPE Disable type ATYPE authentication"); #ifdef ENCRYPTION puts ("\ -x, --encrypt Encrypt the data stream, if possible"); #endif #ifdef AUTHENTICATION puts ("\n\ When using Kerberos authentication:\n\ -f, --fwd-credentials Allow the the local credentials to be forwarded\n\ -k REALM, --realm=REALM Obtain tickets for the remote host in REALM\n\ instead of the remote host's realm"); #endif #if defined(TN3270) && defined(unix) puts ("\n\ TN3270 options (note non-standard option syntax):\n\ -noasynch\n\ -noasynctty\n\ -noasyncnet\n\ -t LINE, --transcom=LINE"); #endif #if defined (ENCRYPTION) || defined (AUTHENTICATION) || defined (TN3270) putc ('\n', stdout); #endif puts ("\ --help Give this help list\n\ -V, --version Print program version"); fprintf (stdout, "\nSubmit bug reports to %s.\n", PACKAGE_BUGREPORT); exit (0); } /* Print a message saying to use --help to STDERR, and exit with a status of 1. */ static void try_help () { fprintf (stderr, "Try `%s --help' for more information.\n", prompt); exit (1); } /* Print a usage message to STDERR and exit with a status of 1. */ static void usage () { fprintf (stderr, USAGE, prompt); try_help (); } static struct option long_options[] = { { "ipv4", no_argument, 0, '4'}, { "ipv6", no_argument, 0, '6'}, { "binary", no_argument, 0, '8' }, { "login", no_argument, 0, 'a' }, { "no-rc", no_argument, 0, 'c' }, { "debug", no_argument, 0, 'd' }, { "escape", required_argument, 0, 'e' }, { "no-escape", no_argument, 0, 'E' }, { "no-login", no_argument, 0, 'K' }, { "user", required_argument, 0, 'l' }, { "binary-output", no_argument, 0, 'L' }, { "trace", required_argument, 0, 'n' }, { "rlogin", no_argument, 0, 'r' }, { "disable-auth", required_argument, 0, 'X' }, { "encrypt", no_argument, 0, 'x' }, { "fwd-credentials", no_argument, 0, 'f' }, { "realm", required_argument, 0, 'k' }, { "transcom", required_argument, 0, 't' }, { "help", no_argument, 0, '&' }, { "version", no_argument, 0, 'V' }, { 0 } }; /* * main. Parse arguments, invoke the protocol or command parser. */ int main(int argc, char *argv[]) { extern char *optarg; extern int optind; int ch; int family = 0; char *user; #ifndef strrchr char *strrchr(); #endif #ifdef FORWARD extern int forward_flags; #endif /* FORWARD */ tninit(); /* Clear out things */ #if defined(CRAY) && !defined(__STDC__) _setlist_init(); /* Work around compiler bug */ #endif TerminalSaveState(); if (prompt = strrchr(argv[0], '/')) ++prompt; else prompt = argv[0]; user = NULL; rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE; autologin = -1; while ((ch = getopt_long (argc, argv, "468EKLS:X:acde:fFk:l:n:rt:x", long_options, 0)) != EOF) { switch(ch) { case '4': family = 4; break; case '6': family = 6; break; case '8': eight = 3; /* binary output and input */ break; case 'E': rlogin = escape = _POSIX_VDISABLE; break; case 'K': #ifdef AUTHENTICATION autologin = 0; #endif break; case 'L': eight |= 2; /* binary output only */ break; case 'X': #ifdef AUTHENTICATION auth_disable_name(optarg); #endif break; case 'a': autologin = 1; break; case 'c': skiprc = 1; break; case 'd': debug = 1; break; case 'e': set_escape_char(optarg); break; case 'f': #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) if (forward_flags & OPTS_FORWARD_CREDS) { fprintf(stderr, "%s: Only one of -f and -F allowed.\n", prompt); help (0); } forward_flags |= OPTS_FORWARD_CREDS; #else fprintf(stderr, "%s: Warning: -f ignored, no Kerberos V5 support.\n", prompt); #endif break; case 'F': #if defined(AUTHENTICATION) && defined(KRB5) && defined(FORWARD) if (forward_flags & OPTS_FORWARD_CREDS) { fprintf(stderr, "%s: Only one of -f and -F allowed.\n", prompt); help (0); } forward_flags |= OPTS_FORWARD_CREDS; forward_flags |= OPTS_FORWARDABLE_CREDS; #else fprintf(stderr, "%s: Warning: -F ignored, no Kerberos V5 support.\n", prompt); #endif break; case 'k': #if defined(AUTHENTICATION) && defined(KRB4) { extern char *dest_realm, dst_realm_buf[], dst_realm_sz; dest_realm = dst_realm_buf; (void)strncpy(dest_realm, optarg, dst_realm_sz); } #else fprintf(stderr, "%s: Warning: -k ignored, no Kerberos V4 support.\n", prompt); #endif break; case 'l': autologin = 1; user = optarg; break; case 'n': #if defined(TN3270) && defined(unix) /* distinguish between "-n oasynch" and "-noasynch" */ if (argv[optind - 1][0] == '-' && argv[optind - 1][1] == 'n' && argv[optind - 1][2] == 'o') { if (!strcmp(optarg, "oasynch")) { noasynchtty = 1; noasynchnet = 1; } else if (!strcmp(optarg, "oasynchtty")) noasynchtty = 1; else if (!strcmp(optarg, "oasynchnet")) noasynchnet = 1; } else #endif /* defined(TN3270) && defined(unix) */ SetNetTrace(optarg); break; case 'r': rlogin = '~'; break; case 't': #if defined(TN3270) && defined(unix) transcom = tline; (void)strcpy(transcom, optarg); #else fprintf(stderr, "%s: Warning: -t ignored, no TN3270 support.\n", prompt); #endif break; case 'x': #ifdef ENCRYPTION encrypt_auto(1); decrypt_auto(1); #else /* ENCRYPTION */ fprintf(stderr, "%s: Warning: -x ignored, no ENCRYPT support.\n", prompt); #endif /* ENCRYPTION */ break; case '&': help (); case 'V': printf ("telnet (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION); exit (0); case '?': try_help (); default: usage (); /* NOTREACHED */ } } if (autologin == -1) autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1; argc -= optind; argv += optind; if (argc) { char *args[8], **argp = args; if (argc > 2) usage (); *argp++ = prompt; if (user) { *argp++ = "-l"; *argp++ = user; } if (family == 4) *argp++ = "-4"; else if (family == 6) *argp++ = "-6"; *argp++ = argv[0]; /* host */ if (argc > 1) *argp++ = argv[1]; /* port */ *argp = 0; if (setjmp(toplevel) != 0) Exit(0); if (tn(argp - args, args) == 1) return (0); else return (1); } (void)setjmp(toplevel); for (;;) { #ifdef TN3270 if (shell_active) shell_continue(); else #endif command(1, 0, 0); } }