main.c revision 1.5.2.2
1 1.5.2.2 cgd /* 2 1.5.2.2 cgd * Copyright (c) 1985, 1989, 1993, 1994 3 1.5.2.2 cgd * The Regents of the University of California. All rights reserved. 4 1.5.2.2 cgd * 5 1.5.2.2 cgd * Redistribution and use in source and binary forms, with or without 6 1.5.2.2 cgd * modification, are permitted provided that the following conditions 7 1.5.2.2 cgd * are met: 8 1.5.2.2 cgd * 1. Redistributions of source code must retain the above copyright 9 1.5.2.2 cgd * notice, this list of conditions and the following disclaimer. 10 1.5.2.2 cgd * 2. Redistributions in binary form must reproduce the above copyright 11 1.5.2.2 cgd * notice, this list of conditions and the following disclaimer in the 12 1.5.2.2 cgd * documentation and/or other materials provided with the distribution. 13 1.5.2.2 cgd * 3. All advertising materials mentioning features or use of this software 14 1.5.2.2 cgd * must display the following acknowledgement: 15 1.5.2.2 cgd * This product includes software developed by the University of 16 1.5.2.2 cgd * California, Berkeley and its contributors. 17 1.5.2.2 cgd * 4. Neither the name of the University nor the names of its contributors 18 1.5.2.2 cgd * may be used to endorse or promote products derived from this software 19 1.5.2.2 cgd * without specific prior written permission. 20 1.5.2.2 cgd * 21 1.5.2.2 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 1.5.2.2 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 1.5.2.2 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 1.5.2.2 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 1.5.2.2 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 1.5.2.2 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 1.5.2.2 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 1.5.2.2 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 1.5.2.2 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 1.5.2.2 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 1.5.2.2 cgd * SUCH DAMAGE. 32 1.5.2.2 cgd */ 33 1.5.2.2 cgd 34 1.5.2.2 cgd #ifndef lint 35 1.5.2.2 cgd static char copyright[] = 36 1.5.2.2 cgd "@(#) Copyright (c) 1985, 1989, 1993, 1994\n\ 37 1.5.2.2 cgd The Regents of the University of California. All rights reserved.\n"; 38 1.5.2.2 cgd #endif /* not lint */ 39 1.5.2.2 cgd 40 1.5.2.2 cgd #ifndef lint 41 1.5.2.2 cgd /*static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 4/3/94";*/ 42 1.5.2.2 cgd static char *rcsid = "$Id: main.c,v 1.5.2.2 1994/08/31 22:07:08 cgd Exp $"; 43 1.5.2.2 cgd #endif /* not lint */ 44 1.5.2.2 cgd 45 1.5.2.2 cgd /* 46 1.5.2.2 cgd * FTP User Program -- Command Interface. 47 1.5.2.2 cgd */ 48 1.5.2.2 cgd /*#include <sys/ioctl.h>*/ 49 1.5.2.2 cgd #include <sys/types.h> 50 1.5.2.2 cgd #include <sys/socket.h> 51 1.5.2.2 cgd 52 1.5.2.2 cgd #include <arpa/ftp.h> 53 1.5.2.2 cgd 54 1.5.2.2 cgd #include <ctype.h> 55 1.5.2.2 cgd #include <err.h> 56 1.5.2.2 cgd #include <netdb.h> 57 1.5.2.2 cgd #include <pwd.h> 58 1.5.2.2 cgd #include <signal.h> 59 1.5.2.2 cgd #include <stdio.h> 60 1.5.2.2 cgd #include <stdlib.h> 61 1.5.2.2 cgd #include <unistd.h> 62 1.5.2.2 cgd 63 1.5.2.2 cgd #include "ftp_var.h" 64 1.5.2.2 cgd 65 1.5.2.2 cgd int 66 1.5.2.2 cgd main(argc, argv) 67 1.5.2.2 cgd int argc; 68 1.5.2.2 cgd char *argv[]; 69 1.5.2.2 cgd { 70 1.5.2.2 cgd int ch, top; 71 1.5.2.2 cgd struct passwd *pw = NULL; 72 1.5.2.2 cgd char *cp, homedir[MAXPATHLEN]; 73 1.5.2.2 cgd 74 1.5.2.2 cgd sp = getservbyname("ftp", "tcp"); 75 1.5.2.2 cgd if (sp == 0) 76 1.5.2.2 cgd errx(1, "ftp/tcp: unknown service"); 77 1.5.2.2 cgd doglob = 1; 78 1.5.2.2 cgd interactive = 1; 79 1.5.2.2 cgd autologin = 1; 80 1.5.2.2 cgd 81 1.5.2.2 cgd while ((ch = getopt(argc, argv, "dgintv")) != -1) { 82 1.5.2.2 cgd switch (ch) { 83 1.5.2.2 cgd case 'd': 84 1.5.2.2 cgd options |= SO_DEBUG; 85 1.5.2.2 cgd debug++; 86 1.5.2.2 cgd break; 87 1.5.2.2 cgd 88 1.5.2.2 cgd case 'g': 89 1.5.2.2 cgd doglob = 0; 90 1.5.2.2 cgd break; 91 1.5.2.2 cgd 92 1.5.2.2 cgd case 'i': 93 1.5.2.2 cgd interactive = 0; 94 1.5.2.2 cgd break; 95 1.5.2.2 cgd 96 1.5.2.2 cgd case 'n': 97 1.5.2.2 cgd autologin = 0; 98 1.5.2.2 cgd break; 99 1.5.2.2 cgd 100 1.5.2.2 cgd case 't': 101 1.5.2.2 cgd trace++; 102 1.5.2.2 cgd break; 103 1.5.2.2 cgd 104 1.5.2.2 cgd case 'v': 105 1.5.2.2 cgd verbose++; 106 1.5.2.2 cgd break; 107 1.5.2.2 cgd 108 1.5.2.2 cgd default: 109 1.5.2.2 cgd (void)fprintf(stderr, 110 1.5.2.2 cgd "usage: ftp [-dgintv] [host [port]]\n"); 111 1.5.2.2 cgd exit(1); 112 1.5.2.2 cgd } 113 1.5.2.2 cgd } 114 1.5.2.2 cgd argc -= optind; 115 1.5.2.2 cgd argv += optind; 116 1.5.2.2 cgd 117 1.5.2.2 cgd fromatty = isatty(fileno(stdin)); 118 1.5.2.2 cgd if (fromatty) 119 1.5.2.2 cgd verbose++; 120 1.5.2.2 cgd cpend = 0; /* no pending replies */ 121 1.5.2.2 cgd proxy = 0; /* proxy not active */ 122 1.5.2.2 cgd passivemode = 0; /* passive mode not active */ 123 1.5.2.2 cgd crflag = 1; /* strip c.r. on ascii gets */ 124 1.5.2.2 cgd sendport = -1; /* not using ports */ 125 1.5.2.2 cgd /* 126 1.5.2.2 cgd * Set up the home directory in case we're globbing. 127 1.5.2.2 cgd */ 128 1.5.2.2 cgd cp = getlogin(); 129 1.5.2.2 cgd if (cp != NULL) { 130 1.5.2.2 cgd pw = getpwnam(cp); 131 1.5.2.2 cgd } 132 1.5.2.2 cgd if (pw == NULL) 133 1.5.2.2 cgd pw = getpwuid(getuid()); 134 1.5.2.2 cgd if (pw != NULL) { 135 1.5.2.2 cgd home = homedir; 136 1.5.2.2 cgd (void) strcpy(home, pw->pw_dir); 137 1.5.2.2 cgd } 138 1.5.2.2 cgd if (argc > 0) { 139 1.5.2.2 cgd char *xargv[5]; 140 1.5.2.2 cgd extern char *__progname; 141 1.5.2.2 cgd 142 1.5.2.2 cgd if (setjmp(toplevel)) 143 1.5.2.2 cgd exit(0); 144 1.5.2.2 cgd (void) signal(SIGINT, intr); 145 1.5.2.2 cgd (void) signal(SIGPIPE, lostpeer); 146 1.5.2.2 cgd xargv[0] = __progname; 147 1.5.2.2 cgd xargv[1] = argv[0]; 148 1.5.2.2 cgd xargv[2] = argv[1]; 149 1.5.2.2 cgd xargv[3] = argv[2]; 150 1.5.2.2 cgd xargv[4] = NULL; 151 1.5.2.2 cgd setpeer(argc+1, xargv); 152 1.5.2.2 cgd } 153 1.5.2.2 cgd top = setjmp(toplevel) == 0; 154 1.5.2.2 cgd if (top) { 155 1.5.2.2 cgd (void) signal(SIGINT, intr); 156 1.5.2.2 cgd (void) signal(SIGPIPE, lostpeer); 157 1.5.2.2 cgd } 158 1.5.2.2 cgd for (;;) { 159 1.5.2.2 cgd cmdscanner(top); 160 1.5.2.2 cgd top = 1; 161 1.5.2.2 cgd } 162 1.5.2.2 cgd } 163 1.5.2.2 cgd 164 1.5.2.2 cgd void 165 1.5.2.2 cgd intr() 166 1.5.2.2 cgd { 167 1.5.2.2 cgd 168 1.5.2.2 cgd longjmp(toplevel, 1); 169 1.5.2.2 cgd } 170 1.5.2.2 cgd 171 1.5.2.2 cgd void 172 1.5.2.2 cgd lostpeer() 173 1.5.2.2 cgd { 174 1.5.2.2 cgd 175 1.5.2.2 cgd if (connected) { 176 1.5.2.2 cgd if (cout != NULL) { 177 1.5.2.2 cgd (void) shutdown(fileno(cout), 1+1); 178 1.5.2.2 cgd (void) fclose(cout); 179 1.5.2.2 cgd cout = NULL; 180 1.5.2.2 cgd } 181 1.5.2.2 cgd if (data >= 0) { 182 1.5.2.2 cgd (void) shutdown(data, 1+1); 183 1.5.2.2 cgd (void) close(data); 184 1.5.2.2 cgd data = -1; 185 1.5.2.2 cgd } 186 1.5.2.2 cgd connected = 0; 187 1.5.2.2 cgd } 188 1.5.2.2 cgd pswitch(1); 189 1.5.2.2 cgd if (connected) { 190 1.5.2.2 cgd if (cout != NULL) { 191 1.5.2.2 cgd (void) shutdown(fileno(cout), 1+1); 192 1.5.2.2 cgd (void) fclose(cout); 193 1.5.2.2 cgd cout = NULL; 194 1.5.2.2 cgd } 195 1.5.2.2 cgd connected = 0; 196 1.5.2.2 cgd } 197 1.5.2.2 cgd proxflag = 0; 198 1.5.2.2 cgd pswitch(0); 199 1.5.2.2 cgd } 200 1.5.2.2 cgd 201 1.5.2.2 cgd /* 202 1.5.2.2 cgd char * 203 1.5.2.2 cgd tail(filename) 204 1.5.2.2 cgd char *filename; 205 1.5.2.2 cgd { 206 1.5.2.2 cgd char *s; 207 1.5.2.2 cgd 208 1.5.2.2 cgd while (*filename) { 209 1.5.2.2 cgd s = strrchr(filename, '/'); 210 1.5.2.2 cgd if (s == NULL) 211 1.5.2.2 cgd break; 212 1.5.2.2 cgd if (s[1]) 213 1.5.2.2 cgd return (s + 1); 214 1.5.2.2 cgd *s = '\0'; 215 1.5.2.2 cgd } 216 1.5.2.2 cgd return (filename); 217 1.5.2.2 cgd } 218 1.5.2.2 cgd */ 219 1.5.2.2 cgd 220 1.5.2.2 cgd /* 221 1.5.2.2 cgd * Command parser. 222 1.5.2.2 cgd */ 223 1.5.2.2 cgd void 224 1.5.2.2 cgd cmdscanner(top) 225 1.5.2.2 cgd int top; 226 1.5.2.2 cgd { 227 1.5.2.2 cgd struct cmd *c; 228 1.5.2.2 cgd int l; 229 1.5.2.2 cgd 230 1.5.2.2 cgd if (!top) 231 1.5.2.2 cgd (void) putchar('\n'); 232 1.5.2.2 cgd for (;;) { 233 1.5.2.2 cgd if (fromatty) { 234 1.5.2.2 cgd printf("ftp> "); 235 1.5.2.2 cgd (void) fflush(stdout); 236 1.5.2.2 cgd } 237 1.5.2.2 cgd if (fgets(line, sizeof line, stdin) == NULL) 238 1.5.2.2 cgd quit(0, 0); 239 1.5.2.2 cgd l = strlen(line); 240 1.5.2.2 cgd if (l == 0) 241 1.5.2.2 cgd break; 242 1.5.2.2 cgd if (line[--l] == '\n') { 243 1.5.2.2 cgd if (l == 0) 244 1.5.2.2 cgd break; 245 1.5.2.2 cgd line[l] = '\0'; 246 1.5.2.2 cgd } else if (l == sizeof(line) - 2) { 247 1.5.2.2 cgd printf("sorry, input line too long\n"); 248 1.5.2.2 cgd while ((l = getchar()) != '\n' && l != EOF) 249 1.5.2.2 cgd /* void */; 250 1.5.2.2 cgd break; 251 1.5.2.2 cgd } /* else it was a line without a newline */ 252 1.5.2.2 cgd makeargv(); 253 1.5.2.2 cgd if (margc == 0) { 254 1.5.2.2 cgd continue; 255 1.5.2.2 cgd } 256 1.5.2.2 cgd c = getcmd(margv[0]); 257 1.5.2.2 cgd if (c == (struct cmd *)-1) { 258 1.5.2.2 cgd printf("?Ambiguous command\n"); 259 1.5.2.2 cgd continue; 260 1.5.2.2 cgd } 261 1.5.2.2 cgd if (c == 0) { 262 1.5.2.2 cgd printf("?Invalid command\n"); 263 1.5.2.2 cgd continue; 264 1.5.2.2 cgd } 265 1.5.2.2 cgd if (c->c_conn && !connected) { 266 1.5.2.2 cgd printf("Not connected.\n"); 267 1.5.2.2 cgd continue; 268 1.5.2.2 cgd } 269 1.5.2.2 cgd (*c->c_handler)(margc, margv); 270 1.5.2.2 cgd if (bell && c->c_bell) 271 1.5.2.2 cgd (void) putchar('\007'); 272 1.5.2.2 cgd if (c->c_handler != help) 273 1.5.2.2 cgd break; 274 1.5.2.2 cgd } 275 1.5.2.2 cgd (void) signal(SIGINT, intr); 276 1.5.2.2 cgd (void) signal(SIGPIPE, lostpeer); 277 1.5.2.2 cgd } 278 1.5.2.2 cgd 279 1.5.2.2 cgd struct cmd * 280 1.5.2.2 cgd getcmd(name) 281 1.5.2.2 cgd char *name; 282 1.5.2.2 cgd { 283 1.5.2.2 cgd char *p, *q; 284 1.5.2.2 cgd struct cmd *c, *found; 285 1.5.2.2 cgd int nmatches, longest; 286 1.5.2.2 cgd 287 1.5.2.2 cgd longest = 0; 288 1.5.2.2 cgd nmatches = 0; 289 1.5.2.2 cgd found = 0; 290 1.5.2.2 cgd for (c = cmdtab; p = c->c_name; c++) { 291 1.5.2.2 cgd for (q = name; *q == *p++; q++) 292 1.5.2.2 cgd if (*q == 0) /* exact match? */ 293 1.5.2.2 cgd return (c); 294 1.5.2.2 cgd if (!*q) { /* the name was a prefix */ 295 1.5.2.2 cgd if (q - name > longest) { 296 1.5.2.2 cgd longest = q - name; 297 1.5.2.2 cgd nmatches = 1; 298 1.5.2.2 cgd found = c; 299 1.5.2.2 cgd } else if (q - name == longest) 300 1.5.2.2 cgd nmatches++; 301 1.5.2.2 cgd } 302 1.5.2.2 cgd } 303 1.5.2.2 cgd if (nmatches > 1) 304 1.5.2.2 cgd return ((struct cmd *)-1); 305 1.5.2.2 cgd return (found); 306 1.5.2.2 cgd } 307 1.5.2.2 cgd 308 1.5.2.2 cgd /* 309 1.5.2.2 cgd * Slice a string up into argc/argv. 310 1.5.2.2 cgd */ 311 1.5.2.2 cgd 312 1.5.2.2 cgd int slrflag; 313 1.5.2.2 cgd 314 1.5.2.2 cgd void 315 1.5.2.2 cgd makeargv() 316 1.5.2.2 cgd { 317 1.5.2.2 cgd char **argp; 318 1.5.2.2 cgd 319 1.5.2.2 cgd margc = 0; 320 1.5.2.2 cgd argp = margv; 321 1.5.2.2 cgd stringbase = line; /* scan from first of buffer */ 322 1.5.2.2 cgd argbase = argbuf; /* store from first of buffer */ 323 1.5.2.2 cgd slrflag = 0; 324 1.5.2.2 cgd while (*argp++ = slurpstring()) 325 1.5.2.2 cgd margc++; 326 1.5.2.2 cgd } 327 1.5.2.2 cgd 328 1.5.2.2 cgd /* 329 1.5.2.2 cgd * Parse string into argbuf; 330 1.5.2.2 cgd * implemented with FSM to 331 1.5.2.2 cgd * handle quoting and strings 332 1.5.2.2 cgd */ 333 1.5.2.2 cgd char * 334 1.5.2.2 cgd slurpstring() 335 1.5.2.2 cgd { 336 1.5.2.2 cgd int got_one = 0; 337 1.5.2.2 cgd char *sb = stringbase; 338 1.5.2.2 cgd char *ap = argbase; 339 1.5.2.2 cgd char *tmp = argbase; /* will return this if token found */ 340 1.5.2.2 cgd 341 1.5.2.2 cgd if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */ 342 1.5.2.2 cgd switch (slrflag) { /* and $ as token for macro invoke */ 343 1.5.2.2 cgd case 0: 344 1.5.2.2 cgd slrflag++; 345 1.5.2.2 cgd stringbase++; 346 1.5.2.2 cgd return ((*sb == '!') ? "!" : "$"); 347 1.5.2.2 cgd /* NOTREACHED */ 348 1.5.2.2 cgd case 1: 349 1.5.2.2 cgd slrflag++; 350 1.5.2.2 cgd altarg = stringbase; 351 1.5.2.2 cgd break; 352 1.5.2.2 cgd default: 353 1.5.2.2 cgd break; 354 1.5.2.2 cgd } 355 1.5.2.2 cgd } 356 1.5.2.2 cgd 357 1.5.2.2 cgd S0: 358 1.5.2.2 cgd switch (*sb) { 359 1.5.2.2 cgd 360 1.5.2.2 cgd case '\0': 361 1.5.2.2 cgd goto OUT; 362 1.5.2.2 cgd 363 1.5.2.2 cgd case ' ': 364 1.5.2.2 cgd case '\t': 365 1.5.2.2 cgd sb++; goto S0; 366 1.5.2.2 cgd 367 1.5.2.2 cgd default: 368 1.5.2.2 cgd switch (slrflag) { 369 1.5.2.2 cgd case 0: 370 1.5.2.2 cgd slrflag++; 371 1.5.2.2 cgd break; 372 1.5.2.2 cgd case 1: 373 1.5.2.2 cgd slrflag++; 374 1.5.2.2 cgd altarg = sb; 375 1.5.2.2 cgd break; 376 1.5.2.2 cgd default: 377 1.5.2.2 cgd break; 378 1.5.2.2 cgd } 379 1.5.2.2 cgd goto S1; 380 1.5.2.2 cgd } 381 1.5.2.2 cgd 382 1.5.2.2 cgd S1: 383 1.5.2.2 cgd switch (*sb) { 384 1.5.2.2 cgd 385 1.5.2.2 cgd case ' ': 386 1.5.2.2 cgd case '\t': 387 1.5.2.2 cgd case '\0': 388 1.5.2.2 cgd goto OUT; /* end of token */ 389 1.5.2.2 cgd 390 1.5.2.2 cgd case '\\': 391 1.5.2.2 cgd sb++; goto S2; /* slurp next character */ 392 1.5.2.2 cgd 393 1.5.2.2 cgd case '"': 394 1.5.2.2 cgd sb++; goto S3; /* slurp quoted string */ 395 1.5.2.2 cgd 396 1.5.2.2 cgd default: 397 1.5.2.2 cgd *ap++ = *sb++; /* add character to token */ 398 1.5.2.2 cgd got_one = 1; 399 1.5.2.2 cgd goto S1; 400 1.5.2.2 cgd } 401 1.5.2.2 cgd 402 1.5.2.2 cgd S2: 403 1.5.2.2 cgd switch (*sb) { 404 1.5.2.2 cgd 405 1.5.2.2 cgd case '\0': 406 1.5.2.2 cgd goto OUT; 407 1.5.2.2 cgd 408 1.5.2.2 cgd default: 409 1.5.2.2 cgd *ap++ = *sb++; 410 1.5.2.2 cgd got_one = 1; 411 1.5.2.2 cgd goto S1; 412 1.5.2.2 cgd } 413 1.5.2.2 cgd 414 1.5.2.2 cgd S3: 415 1.5.2.2 cgd switch (*sb) { 416 1.5.2.2 cgd 417 1.5.2.2 cgd case '\0': 418 1.5.2.2 cgd goto OUT; 419 1.5.2.2 cgd 420 1.5.2.2 cgd case '"': 421 1.5.2.2 cgd sb++; goto S1; 422 1.5.2.2 cgd 423 1.5.2.2 cgd default: 424 1.5.2.2 cgd *ap++ = *sb++; 425 1.5.2.2 cgd got_one = 1; 426 1.5.2.2 cgd goto S3; 427 1.5.2.2 cgd } 428 1.5.2.2 cgd 429 1.5.2.2 cgd OUT: 430 1.5.2.2 cgd if (got_one) 431 1.5.2.2 cgd *ap++ = '\0'; 432 1.5.2.2 cgd argbase = ap; /* update storage pointer */ 433 1.5.2.2 cgd stringbase = sb; /* update scan pointer */ 434 1.5.2.2 cgd if (got_one) { 435 1.5.2.2 cgd return (tmp); 436 1.5.2.2 cgd } 437 1.5.2.2 cgd switch (slrflag) { 438 1.5.2.2 cgd case 0: 439 1.5.2.2 cgd slrflag++; 440 1.5.2.2 cgd break; 441 1.5.2.2 cgd case 1: 442 1.5.2.2 cgd slrflag++; 443 1.5.2.2 cgd altarg = (char *) 0; 444 1.5.2.2 cgd break; 445 1.5.2.2 cgd default: 446 1.5.2.2 cgd break; 447 1.5.2.2 cgd } 448 1.5.2.2 cgd return ((char *)0); 449 1.5.2.2 cgd } 450 1.5.2.2 cgd 451 1.5.2.2 cgd #define HELPINDENT ((int) sizeof ("directory")) 452 1.5.2.2 cgd 453 1.5.2.2 cgd /* 454 1.5.2.2 cgd * Help command. 455 1.5.2.2 cgd * Call each command handler with argc == 0 and argv[0] == name. 456 1.5.2.2 cgd */ 457 1.5.2.2 cgd void 458 1.5.2.2 cgd help(argc, argv) 459 1.5.2.2 cgd int argc; 460 1.5.2.2 cgd char *argv[]; 461 1.5.2.2 cgd { 462 1.5.2.2 cgd struct cmd *c; 463 1.5.2.2 cgd 464 1.5.2.2 cgd if (argc == 1) { 465 1.5.2.2 cgd int i, j, w, k; 466 1.5.2.2 cgd int columns, width = 0, lines; 467 1.5.2.2 cgd 468 1.5.2.2 cgd printf("Commands may be abbreviated. Commands are:\n\n"); 469 1.5.2.2 cgd for (c = cmdtab; c < &cmdtab[NCMDS]; c++) { 470 1.5.2.2 cgd int len = strlen(c->c_name); 471 1.5.2.2 cgd 472 1.5.2.2 cgd if (len > width) 473 1.5.2.2 cgd width = len; 474 1.5.2.2 cgd } 475 1.5.2.2 cgd width = (width + 8) &~ 7; 476 1.5.2.2 cgd columns = 80 / width; 477 1.5.2.2 cgd if (columns == 0) 478 1.5.2.2 cgd columns = 1; 479 1.5.2.2 cgd lines = (NCMDS + columns - 1) / columns; 480 1.5.2.2 cgd for (i = 0; i < lines; i++) { 481 1.5.2.2 cgd for (j = 0; j < columns; j++) { 482 1.5.2.2 cgd c = cmdtab + j * lines + i; 483 1.5.2.2 cgd if (c->c_name && (!proxy || c->c_proxy)) { 484 1.5.2.2 cgd printf("%s", c->c_name); 485 1.5.2.2 cgd } 486 1.5.2.2 cgd else if (c->c_name) { 487 1.5.2.2 cgd for (k=0; k < strlen(c->c_name); k++) { 488 1.5.2.2 cgd (void) putchar(' '); 489 1.5.2.2 cgd } 490 1.5.2.2 cgd } 491 1.5.2.2 cgd if (c + lines >= &cmdtab[NCMDS]) { 492 1.5.2.2 cgd printf("\n"); 493 1.5.2.2 cgd break; 494 1.5.2.2 cgd } 495 1.5.2.2 cgd w = strlen(c->c_name); 496 1.5.2.2 cgd while (w < width) { 497 1.5.2.2 cgd w = (w + 8) &~ 7; 498 1.5.2.2 cgd (void) putchar('\t'); 499 1.5.2.2 cgd } 500 1.5.2.2 cgd } 501 1.5.2.2 cgd } 502 1.5.2.2 cgd return; 503 1.5.2.2 cgd } 504 1.5.2.2 cgd while (--argc > 0) { 505 1.5.2.2 cgd char *arg; 506 1.5.2.2 cgd arg = *++argv; 507 1.5.2.2 cgd c = getcmd(arg); 508 1.5.2.2 cgd if (c == (struct cmd *)-1) 509 1.5.2.2 cgd printf("?Ambiguous help command %s\n", arg); 510 1.5.2.2 cgd else if (c == (struct cmd *)0) 511 1.5.2.2 cgd printf("?Invalid help command %s\n", arg); 512 1.5.2.2 cgd else 513 1.5.2.2 cgd printf("%-*s\t%s\n", HELPINDENT, 514 1.5.2.2 cgd c->c_name, c->c_help); 515 1.5.2.2 cgd } 516 1.5.2.2 cgd } 517
Indexes created Mon Oct 20 03:09:53 GMT 2025