/* * Copyright (c) 1988 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the University of California, Berkeley. The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint static char sccsid[] = "@(#)commands.c 1.15 (Berkeley) 02/06/89"; #endif /* not lint */ #include #if defined(unix) #include #endif /* defined(unix) */ #include #include #include #include #include #include #include #include "general.h" #include "ring.h" #include "externs.h" #include "defines.h" #include "types.h" char *hostname; #define Ambiguous(s) ((char **)s == &ambiguous) static char *ambiguous; /* special return value for command routines */ typedef struct { char *name; /* command name */ char *help; /* help string */ int (*handler)(); /* routine which executes command */ int dohelp; /* Should we give general help information? */ int needconnect; /* Do we need to be connected to execute? */ } Command; static char line[200]; static int margc; static char *margv[20]; /* * Various utility routines. */ #if !defined(BSD) || (BSD <= 43) char *h_errlist[] = { "Error 0", "Unknown host", /* 1 HOST_NOT_FOUND */ "Host name lookup failure", /* 2 TRY_AGAIN */ "Unknown server error", /* 3 NO_RECOVERY */ "No address associated with name", /* 4 NO_ADDRESS */ }; int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) }; int h_errno; /* In some version of SunOS this is necessary */ /* * herror -- * print the error indicated by the h_errno value. */ herror(s) char *s; { if (s && *s) { fprintf(stderr, "%s: ", s); } if ((h_errno < 0) || (h_errno >= h_nerr)) { fprintf(stderr, "Unknown error\n"); } else if (h_errno == 0) { #if defined(sun) fprintf(stderr, "Host unknown\n"); #endif /* defined(sun) */ } else { fprintf(stderr, "%s\n", h_errlist[h_errno]); } } #endif /* !define(BSD) || (BSD <= 43) */ static void makeargv() { register char *cp; register char **argp = margv; margc = 0; cp = line; if (*cp == '!') { /* Special case shell escape */ *argp++ = "!"; /* No room in string to get this */ margc++; cp++; } while (*cp) { while (isspace(*cp)) cp++; if (*cp == '\0') break; *argp++ = cp; margc += 1; while (*cp != '\0' && !isspace(*cp)) cp++; if (*cp == '\0') break; *cp++ = '\0'; } *argp++ = 0; } static char ** genget(name, table, next) char *name; /* name to match */ char **table; /* name entry in table */ char **(*next)(); /* routine to return next entry in table */ { register char *p, *q; register char **c, **found; register int nmatches, longest; if (name == 0) { return 0; } longest = 0; nmatches = 0; found = 0; for (c = table; (p = *c) != 0; c = (*next)(c)) { for (q = name; (*q == *p) || (isupper(*q) && tolower(*q) == *p); p++, q++) if (*q == 0) /* exact match? */ return (c); if (!*q) { /* the name was a prefix */ if (q - name > longest) { longest = q - name; nmatches = 1; found = c; } else if (q - name == longest) nmatches++; } } if (nmatches > 1) return &ambiguous; return (found); } /* * Make a character string into a number. * * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). */ static special(s) register char *s; { register char c; char b; switch (*s) { case '^': b = *++s; if (b == '?') { c = b | 0x40; /* DEL */ } else { c = b & 0x1f; } break; default: c = *s; break; } return c; } /* * Construct a control character sequence * for a special character. */ static char * control(c) register int c; { static char buf[3]; if (c == 0x7f) return ("^?"); if (c == '\377') { return "off"; } if (c >= 0x20) { buf[0] = c; buf[1] = 0; } else { buf[0] = '^'; buf[1] = '@'+c; buf[2] = 0; } return (buf); } /* * The following are data structures and routines for * the "send" command. * */ struct sendlist { char *name; /* How user refers to it (case independent) */ int what; /* Character to be sent (<0 ==> special) */ char *help; /* Help information (0 ==> no help) */ #if defined(NOT43) int (*routine)(); /* Routine to perform (for special ops) */ #else /* defined(NOT43) */ void (*routine)(); /* Routine to perform (for special ops) */ #endif /* defined(NOT43) */ }; #define SENDQUESTION -1 #define SENDESCAPE -3 static struct sendlist Sendlist[] = { { "ao", AO, "Send Telnet Abort output" }, { "ayt", AYT, "Send Telnet 'Are You There'" }, { "brk", BREAK, "Send Telnet Break" }, { "ec", EC, "Send Telnet Erase Character" }, { "el", EL, "Send Telnet Erase Line" }, { "escape", SENDESCAPE, "Send current escape character" }, { "ga", GA, "Send Telnet 'Go Ahead' sequence" }, { "ip", IP, "Send Telnet Interrupt Process" }, { "nop", NOP, "Send Telnet 'No operation'" }, { "synch", SYNCH, "Perform Telnet 'Synch operation'", dosynch }, { "?", SENDQUESTION, "Display send options" }, { 0 } }; static struct sendlist Sendlist2[] = { /* some synonyms */ { "break", BREAK, 0 }, { "intp", IP, 0 }, { "interrupt", IP, 0 }, { "intr", IP, 0 }, { "help", SENDQUESTION, 0 }, { 0 } }; static char ** getnextsend(name) char *name; { struct sendlist *c = (struct sendlist *) name; return (char **) (c+1); } static struct sendlist * getsend(name) char *name; { struct sendlist *sl; if ((sl = (struct sendlist *) genget(name, (char **) Sendlist, getnextsend)) != 0) { return sl; } else { return (struct sendlist *) genget(name, (char **) Sendlist2, getnextsend); } } static sendcmd(argc, argv) int argc; char **argv; { int what; /* what we are sending this time */ int count; /* how many bytes we are going to need to send */ int i; int question = 0; /* was at least one argument a question */ struct sendlist *s; /* pointer to current command */ if (argc < 2) { printf("need at least one argument for 'send' command\n"); printf("'send ?' for help\n"); return 0; } /* * First, validate all the send arguments. * In addition, we see how much space we are going to need, and * whether or not we will be doing a "SYNCH" operation (which * flushes the network queue). */ count = 0; for (i = 1; i < argc; i++) { s = getsend(argv[i]); if (s == 0) { printf("Unknown send argument '%s'\n'send ?' for help.\n", argv[i]); return 0; } else if (Ambiguous(s)) { printf("Ambiguous send argument '%s'\n'send ?' for help.\n", argv[i]); return 0; } switch (s->what) { case SENDQUESTION: break; case SENDESCAPE: count += 1; break; case SYNCH: count += 2; break; default: count += 2; break; } } /* Now, do we have enough room? */ if (NETROOM() < count) { printf("There is not enough room in the buffer TO the network\n"); printf("to process your request. Nothing will be done.\n"); printf("('send synch' will throw away most data in the network\n"); printf("buffer, if this might help.)\n"); return 0; } /* OK, they are all OK, now go through again and actually send */ for (i = 1; i < argc; i++) { if ((s = getsend(argv[i])) == 0) { fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); quit(); /*NOTREACHED*/ } if (s->routine) { (*s->routine)(s); } else { switch (what = s->what) { case SYNCH: dosynch(); break; case SENDQUESTION: for (s = Sendlist; s->name; s++) { if (s->help) { printf(s->name); if (s->help) { printf("\t%s", s->help); } printf("\n"); } } question = 1; break; case SENDESCAPE: NETADD(escape); break; default: NET2ADD(IAC, what); break; } } } return !question; } /* * The following are the routines and data structures referred * to by the arguments to the "toggle" command. */ static lclchars() { donelclchars = 1; return 1; } static togdebug() { #ifndef NOT43 if (net > 0 && (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { perror("setsockopt (SO_DEBUG)"); } #else /* NOT43 */ if (debug) { if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) perror("setsockopt (SO_DEBUG)"); } else printf("Cannot turn off socket debugging\n"); #endif /* NOT43 */ return 1; } static int togcrlf() { if (crlf) { printf("Will send carriage returns as telnet .\n"); } else { printf("Will send carriage returns as telnet .\n"); } return 1; } static int togbinary() { donebinarytoggle = 1; if (myopts[TELOPT_BINARY] == 0) { /* Go into binary mode */ NET2ADD(IAC, DO); NETADD(TELOPT_BINARY); printoption("", togcrlf, 1, &crlf, 0 }, { "crmod", "toggle mapping of received carriage returns", 0, 1, &crmod, "map carriage return on output" }, { "localchars", "toggle local recognition of certain control characters", lclchars, 1, &localchars, "recognize certain control characters" }, { " ", "", 0, 1 }, /* empty line */ { "debug", "(debugging) toggle debugging", togdebug, 1, &debug, "turn on socket level debugging" }, { "netdata", "(debugging) toggle printing of hexadecimal network data", 0, 1, &netdata, "print hexadecimal representation of network traffic" }, { "options", "(debugging) toggle viewing of options processing", 0, 1, &showoptions, "show option processing" }, { " ", "", 0, 1 }, /* empty line */ { "?", "display help information", togglehelp, 1 }, { "help", "display help information", togglehelp, 0 }, { 0 } }; static togglehelp() { struct togglelist *c; for (c = Togglelist; c->name; c++) { if (c->dohelp) { printf("%s\t%s\n", c->name, c->help); } } return 0; } static char ** getnexttoggle(name) char *name; { struct togglelist *c = (struct togglelist *) name; return (char **) (c+1); } static struct togglelist * gettoggle(name) char *name; { return (struct togglelist *) genget(name, (char **) Togglelist, getnexttoggle); } static toggle(argc, argv) int argc; char *argv[]; { int retval = 1; char *name; struct togglelist *c; if (argc < 2) { fprintf(stderr, "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); return 0; } argc--; argv++; while (argc--) { name = *argv++; c = gettoggle(name); if (Ambiguous(c)) { fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", name); return 0; } else if (c == 0) { fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", name); return 0; } else { if (c->variable) { *c->variable = !*c->variable; /* invert it */ if (c->actionexplanation) { printf("%s %s.\n", *c->variable? "Will" : "Won't", c->actionexplanation); } } if (c->handler) { retval &= (*c->handler)(c); } } } return retval; } /* * The following perform the "set" command. */ struct setlist { char *name; /* name */ char *help; /* help information */ char *charp; /* where it is located at */ }; static struct setlist Setlist[] = { { "echo", "character to toggle local echoing on/off", &echoc }, { "escape", "character to escape back to telnet command mode", &escape }, { " ", "" }, { " ", "The following need 'localchars' to be toggled true", 0 }, { "erase", "character to cause an Erase Character", &termEraseChar }, { "flushoutput", "character to cause an Abort Oubput", &termFlushChar }, { "interrupt", "character to cause an Interrupt Process", &termIntChar }, { "kill", "character to cause an Erase Line", &termKillChar }, { "quit", "character to cause a Break", &termQuitChar }, { "eof", "character to cause an EOF ", &termEofChar }, { 0 } }; static char ** getnextset(name) char *name; { struct setlist *c = (struct setlist *)name; return (char **) (c+1); } static struct setlist * getset(name) char *name; { return (struct setlist *) genget(name, (char **) Setlist, getnextset); } static setcmd(argc, argv) int argc; char *argv[]; { int value; struct setlist *ct; /* XXX back we go... sigh */ if (argc != 3) { if ((argc == 2) && ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help")))) { for (ct = Setlist; ct->name; ct++) { printf("%s\t%s\n", ct->name, ct->help); } printf("?\tdisplay help information\n"); } else { printf("Format is 'set Name Value'\n'set ?' for help.\n"); } return 0; } ct = getset(argv[1]); if (ct == 0) { fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", argv[1]); return 0; } else if (Ambiguous(ct)) { fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", argv[1]); return 0; } else { if (strcmp("off", argv[2])) { value = special(argv[2]); } else { value = -1; } *(ct->charp) = value; printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); } return 1; } /* * The following are the data structures and routines for the * 'mode' command. */ static dolinemode() { if (hisopts[TELOPT_SGA]) { wontoption(TELOPT_SGA, 0); } if (hisopts[TELOPT_ECHO]) { wontoption(TELOPT_ECHO, 0); } return 1; } static docharmode() { if (!hisopts[TELOPT_SGA]) { willoption(TELOPT_SGA, 0); } if (!hisopts[TELOPT_ECHO]) { willoption(TELOPT_ECHO, 0); } return 1; } static Command Mode_commands[] = { { "character", "character-at-a-time mode", docharmode, 1, 1 }, { "line", "line-by-line mode", dolinemode, 1, 1 }, { 0 }, }; static char ** getnextmode(name) char *name; { Command *c = (Command *) name; return (char **) (c+1); } static Command * getmodecmd(name) char *name; { return (Command *) genget(name, (char **) Mode_commands, getnextmode); } static modecmd(argc, argv) int argc; char *argv[]; { Command *mt; if ((argc != 2) || !strcmp(argv[1], "?") || !strcmp(argv[1], "help")) { printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); for (mt = Mode_commands; mt->name; mt++) { printf("%s\t%s\n", mt->name, mt->help); } return 0; } mt = getmodecmd(argv[1]); if (mt == 0) { fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); return 0; } else if (Ambiguous(mt)) { fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); return 0; } else { (*mt->handler)(); } return 1; } /* * The following data structures and routines implement the * "display" command. */ static display(argc, argv) int argc; char *argv[]; { #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ if (*tl->variable) { \ printf("will"); \ } else { \ printf("won't"); \ } \ printf(" %s.\n", tl->actionexplanation); \ } #define doset(sl) if (sl->name && *sl->name != ' ') { \ printf("[%s]\t%s.\n", control(*sl->charp), sl->name); \ } struct togglelist *tl; struct setlist *sl; if (argc == 1) { for (tl = Togglelist; tl->name; tl++) { dotog(tl); } printf("\n"); for (sl = Setlist; sl->name; sl++) { doset(sl); } } else { int i; for (i = 1; i < argc; i++) { sl = getset(argv[i]); tl = gettoggle(argv[i]); if (Ambiguous(sl) || Ambiguous(tl)) { printf("?Ambiguous argument '%s'.\n", argv[i]); return 0; } else if (!sl && !tl) { printf("?Unknown argument '%s'.\n", argv[i]); return 0; } else { if (tl) { dotog(tl); } if (sl) { doset(sl); } } } } return 1; #undef doset #undef dotog } /* * The following are the data structures, and many of the routines, * relating to command processing. */ /* * Set the escape character. */ static setescape(argc, argv) int argc; char *argv[]; { register char *arg; char buf[50]; printf( "Deprecated usage - please use 'set escape%s%s' in the future.\n", (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); if (argc > 2) arg = argv[1]; else { printf("new escape character: "); (void) gets(buf); arg = buf; } if (arg[0] != '\0') escape = arg[0]; if (!In3270) { printf("Escape character is '%s'.\n", control(escape)); } (void) fflush(stdout); return 1; } /*VARARGS*/ static togcrmod() { crmod = !crmod; printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); (void) fflush(stdout); return 1; } /*VARARGS*/ suspend() { setcommandmode(); #if defined(unix) (void) kill(0, SIGTSTP); #endif /* defined(unix) */ /* reget parameters in case they were changed */ TerminalSaveState(); setconnmode(); return 1; } /*VARARGS*/ static bye(argc, argv) int argc; /* Number of arguments */ char *argv[]; /* arguments */ { if (connected) { (void) shutdown(net, 2); printf("Connection closed.\n"); (void) NetClose(net); connected = 0; /* reset options */ tninit(); #if defined(TN3270) SetIn3270(); /* Get out of 3270 mode */ #endif /* defined(TN3270) */ } if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { longjmp(toplevel, 1); /* NOTREACHED */ } return 1; /* Keep lint, etc., happy */ } /*VARARGS*/ quit() { (void) call(bye, "bye", "fromquit", 0); Exit(0); return 1; /* just to keep lint happy */ } #if defined(unix) /* * Some information about our file descriptors. */ char * decodeflags(mask) int mask; { static char buffer[100]; #define do(m,s) \ if (mask&(m)) { \ strcat(buffer, (s)); \ } buffer[0] = 0; /* Terminate it */ #ifdef FREAD do(FREAD, " FREAD"); #endif #ifdef FWRITE do(FWRITE, " FWRITE"); #endif #ifdef F_DUPFP do(F_DUPFD, " F_DUPFD"); #endif #ifdef FNDELAY do(FNDELAY, " FNDELAY"); #endif #ifdef FAPPEND do(FAPPEND, " FAPPEND"); #endif #ifdef FMARK do(FMARK, " FMARK"); #endif #ifdef FDEFER do(FDEFER, " FDEFER"); #endif #ifdef FASYNC do(FASYNC, " FASYNC"); #endif #ifdef FSHLOCK do(FSHLOCK, " FSHLOCK"); #endif #ifdef FEXLOCK do(FEXLOCK, " FEXLOCK"); #endif #ifdef FCREAT do(FCREAT, " FCREAT"); #endif #ifdef FTRUNC do(FTRUNC, " FTRUNC"); #endif #ifdef FEXCL do(FEXCL, " FEXCL"); #endif return buffer; } #undef do static void filestuff(fd) int fd; { int res; setconnmode(); res = fcntl(fd, F_GETOWN, 0); setcommandmode(); if (res == -1) { perror("fcntl"); return; } printf("\tOwner is %d.\n", res); setconnmode(); res = fcntl(fd, F_GETFL, 0); setcommandmode(); if (res == -1) { perror("fcntl"); return; } printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); } #endif /* defined(unix) */ /* * Print status about the connection. */ /*ARGSUSED*/ static status(argc, argv) int argc; char *argv[]; { if (connected) { printf("Connected to %s.\n", hostname); if ((argc < 2) || strcmp(argv[1], "notmuch")) { printf("Operating in %s.\n", modelist[getconnmode()].modedescriptions); if (localchars) { printf("Catching signals locally.\n"); } } } else { printf("No connection.\n"); } # if !defined(TN3270) printf("Escape character is '%s'.\n", control(escape)); (void) fflush(stdout); # else /* !defined(TN3270) */ if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { printf("Escape character is '%s'.\n", control(escape)); } # if defined(unix) if ((argc >= 2) && !strcmp(argv[1], "everything")) { printf("SIGIO received %d time%s.\n", sigiocount, (sigiocount == 1)? "":"s"); if (In3270) { printf("Process ID %d, process group %d.\n", getpid(), getpgrp(getpid())); printf("Terminal input:\n"); filestuff(tin); printf("Terminal output:\n"); filestuff(tout); printf("Network socket:\n"); filestuff(net); } } if (In3270 && transcom) { printf("Transparent mode command is '%s'.\n", transcom); } # endif /* defined(unix) */ (void) fflush(stdout); if (In3270) { return 0; } # endif /* defined(TN3270) */ return 1; } int tn(argc, argv) int argc; char *argv[]; { register struct hostent *host = 0; struct sockaddr_in sin; struct servent *sp = 0; static char hnamebuf[32]; unsigned long inet_addr(); #if defined(MSDOS) char *cp; #endif /* defined(MSDOS) */ if (connected) { printf("?Already connected to %s\n", hostname); return 0; } if (argc < 2) { (void) strcpy(line, "Connect "); printf("(to) "); (void) gets(&line[strlen(line)]); makeargv(); argc = margc; argv = margv; } if ((argc < 2) || (argc > 3)) { printf("usage: %s host-name [port]\n", argv[0]); return 0; } #if defined(MSDOS) for (cp = argv[1]; *cp; cp++) { if (isupper(*cp)) { *cp = tolower(*cp); } } #endif /* defined(MSDOS) */ sin.sin_addr.s_addr = inet_addr(argv[1]); if (sin.sin_addr.s_addr != (unsigned long) -1) { sin.sin_family = AF_INET; (void) strcpy(hnamebuf, argv[1]); hostname = hnamebuf; } else { host = gethostbyname(argv[1]); if (host) { sin.sin_family = host->h_addrtype; #if defined(h_addr) /* In 4.3, this is a #define */ memcpy((caddr_t)&sin.sin_addr, host->h_addr_list[0], host->h_length); #else /* defined(h_addr) */ memcpy((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); #endif /* defined(h_addr) */ hostname = host->h_name; } else { herror(argv[1]); return 0; } } if (argc == 3) { sin.sin_port = atoi(argv[2]); if (sin.sin_port == 0) { sp = getservbyname(argv[2], "tcp"); if (sp) sin.sin_port = sp->s_port; else { printf("%s: bad port number\n", argv[2]); return 0; } } else { #if !defined(htons) u_short htons(); #endif /* !defined(htons) */ sin.sin_port = atoi(argv[2]); sin.sin_port = htons(sin.sin_port); } telnetport = 0; } else { if (sp == 0) { sp = getservbyname("telnet", "tcp"); if (sp == 0) { fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); return 0; } sin.sin_port = sp->s_port; } telnetport = 1; } printf("Trying...\n"); do { net = socket(AF_INET, SOCK_STREAM, 0); if (net < 0) { perror("telnet: socket"); return 0; } if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { perror("setsockopt (SO_DEBUG)"); } if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { #if defined(h_addr) /* In 4.3, this is a #define */ if (host && host->h_addr_list[1]) { int oerrno = errno; extern char *inet_ntoa(); fprintf(stderr, "telnet: connect to address %s: ", inet_ntoa(sin.sin_addr)); errno = oerrno; perror((char *)0); host->h_addr_list++; memcpy((caddr_t)&sin.sin_addr, host->h_addr_list[0], host->h_length); fprintf(stderr, "Trying %s...\n", inet_ntoa(sin.sin_addr)); (void) NetClose(net); continue; } #endif /* defined(h_addr) */ perror("telnet: Unable to connect to remote host"); return 0; } connected++; } while (connected == 0); (void) call(status, "status", "notmuch", 0); if (setjmp(peerdied) == 0) telnet(); (void) NetClose(net); ExitString("Connection closed by foreign host.\n",1); /*NOTREACHED*/ } #define HELPINDENT (sizeof ("connect")) static char openhelp[] = "connect to a site", closehelp[] = "close current connection", quithelp[] = "exit telnet", statushelp[] = "print status information", helphelp[] = "print help information", sendhelp[] = "transmit special characters ('send ?' for more)", sethelp[] = "set operating parameters ('set ?' for more)", togglestring[] ="toggle operating parameters ('toggle ?' for more)", displayhelp[] = "display operating parameters", #if defined(TN3270) && defined(unix) transcomhelp[] = "specify Unix command for transparent mode pipe", #endif /* defined(TN3270) && defined(unix) */ #if defined(unix) zhelp[] = "suspend telnet", #endif /* defined(unix */ #if defined(TN3270) shellhelp[] = "invoke a subshell", #endif /* defined(TN3270) */ modehelp[] = "try to enter line-by-line or character-at-a-time mode"; extern int help(), shell(); static Command cmdtab[] = { { "close", closehelp, bye, 1, 1 }, { "display", displayhelp, display, 1, 0 }, { "mode", modehelp, modecmd, 1, 1 }, { "open", openhelp, tn, 1, 0 }, { "quit", quithelp, quit, 1, 0 }, { "send", sendhelp, sendcmd, 1, 1 }, { "set", sethelp, setcmd, 1, 0 }, { "status", statushelp, status, 1, 0 }, { "toggle", togglestring, toggle, 1, 0 }, #if defined(TN3270) && defined(unix) { "transcom", transcomhelp, settranscom, 1, 0 }, #endif /* defined(TN3270) && defined(unix) */ #if defined(unix) { "z", zhelp, suspend, 1, 0 }, #endif /* defined(unix) */ #if defined(TN3270) { "!", shellhelp, shell, 1, 1 }, #endif /* defined(TN3270) */ { "?", helphelp, help, 1, 0 }, 0 }; static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; static char escapehelp[] = "deprecated command -- use 'set escape' instead"; static Command cmdtab2[] = { { "help", helphelp, help, 0, 0 }, { "escape", escapehelp, setescape, 1, 0 }, { "crmod", crmodhelp, togcrmod, 1, 0 }, 0 }; /* * Call routine with argc, argv set from args (terminated by 0). */ /*VARARGS1*/ static call(va_alist) va_dcl { va_list ap; typedef int (*intrtn_t)(); intrtn_t routine; char *args[100]; int argno = 0; va_start(ap); routine = (va_arg(ap, intrtn_t)); while ((args[argno++] = va_arg(ap, char *)) != 0) { ; } va_end(ap); return (*routine)(argno-1, args); } static char ** getnextcmd(name) char *name; { Command *c = (Command *) name; return (char **) (c+1); } static Command * getcmd(name) char *name; { Command *cm; if ((cm = (Command *) genget(name, (char **) cmdtab, getnextcmd)) != 0) { return cm; } else { return (Command *) genget(name, (char **) cmdtab2, getnextcmd); } } void command(top) int top; { register Command *c; setcommandmode(); if (!top) { putchar('\n'); } else { #if defined(unix) signal(SIGINT, SIG_DFL); signal(SIGQUIT, SIG_DFL); #endif /* defined(unix) */ } for (;;) { printf("%s> ", prompt); if (gets(line) == NULL) { if (feof(stdin) || ferror(stdin)) quit(); break; } if (line[0] == 0) break; makeargv(); c = getcmd(margv[0]); if (Ambiguous(c)) { printf("?Ambiguous command\n"); continue; } if (c == 0) { printf("?Invalid command\n"); continue; } if (c->needconnect && !connected) { printf("?Need to be connected first.\n"); continue; } if ((*c->handler)(margc, margv)) { break; } } if (!top) { if (!connected) { longjmp(toplevel, 1); /*NOTREACHED*/ } #if defined(TN3270) if (shell_active == 0) { setconnmode(); } #else /* defined(TN3270) */ setconnmode(); #endif /* defined(TN3270) */ } } /* * Help command. */ static help(argc, argv) int argc; char *argv[]; { register Command *c; if (argc == 1) { printf("Commands may be abbreviated. Commands are:\n\n"); for (c = cmdtab; c->name; c++) if (c->dohelp) { printf("%-*s\t%s\n", HELPINDENT, c->name, c->help); } return 0; } while (--argc > 0) { register char *arg; arg = *++argv; c = getcmd(arg); if (Ambiguous(c)) printf("?Ambiguous help command %s\n", arg); else if (c == (Command *)0) printf("?Invalid help command %s\n", arg); else printf("%s\n", c->help); } return 0; }