contrib/tnftp/complete.c

   1 /*      $NetBSD: complete.c,v 1.41 2006/01/31 20:01:23 christos Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1997-2000,2005 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Luke Mewburn.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the NetBSD
  21  *      Foundation, Inc. and its contributors.
  22  * 4. Neither the name of The NetBSD Foundation nor the names of its
  23  *    contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 #ifndef lint
  41 __RCSID("$NetBSD: complete.c,v 1.41 2006/01/31 20:01:23 christos Exp $");
  42 #endif /* not lint */
  43
  44 /*
  45  * FTP user program - command and file completion routines
  46  */
  47
  48 #include <sys/stat.h>
  49
  50 #include <ctype.h>
  51 #include <err.h>
  52 #include <dirent.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56
  57 #include "ftp_var.h"
  58
  59 #ifndef NO_EDITCOMPLETE
  60
  61 static int           comparstr          (const void *, const void *);
  62 static unsigned char complete_ambiguous (char *, int, StringList *);
  63 static unsigned char complete_command   (char *, int);
  64 static unsigned char complete_local     (char *, int);
  65 static unsigned char complete_option    (char *, int);
  66 static unsigned char complete_remote    (char *, int);
  67
  68 static int
  69 comparstr(const void *a, const void *b)
  70 {
  71         return (strcmp(*(const char * const *)a, *(const char * const *)b));
  72 }
  73
  74 /*
  75  * Determine if complete is ambiguous. If unique, insert.
  76  * If no choices, error. If unambiguous prefix, insert that.
  77  * Otherwise, list choices. words is assumed to be filtered
  78  * to only contain possible choices.
  79  * Args:
  80  *      word    word which started the match
  81  *      list    list by default
  82  *      words   stringlist containing possible matches
  83  * Returns a result as per el_set(EL_ADDFN, ...)
  84  */
  85 static unsigned char
  86 complete_ambiguous(char *word, int list, StringList *words)
  87 {
  88         char insertstr[MAXPATHLEN];
  89         char *lastmatch, *p;
  90         int i, j;
  91         size_t matchlen, wordlen;
  92
  93         wordlen = strlen(word);
  94         if (words->sl_cur == 0)
  95                 return (CC_ERROR);      /* no choices available */
  96
  97         if (words->sl_cur == 1) {       /* only once choice available */
  98                 p = words->sl_str[0] + wordlen;
  99                 if (*p == '\0')         /* at end of word? */
 100                         return (CC_REFRESH);
 101                 ftpvis(insertstr, sizeof(insertstr), p, strlen(p));
 102                 if (el_insertstr(el, insertstr) == -1)
 103                         return (CC_ERROR);
 104                 else
 105                         return (CC_REFRESH);
 106         }
 107
 108         if (!list) {
 109                 matchlen = 0;
 110                 lastmatch = words->sl_str[0];
 111                 matchlen = strlen(lastmatch);
 112                 for (i = 1 ; i < words->sl_cur ; i++) {
 113                         for (j = wordlen ; j < strlen(words->sl_str[i]); j++)
 114                                 if (lastmatch[j] != words->sl_str[i][j])
 115                                         break;
 116                         if (j < matchlen)
 117                                 matchlen = j;
 118                 }
 119                 if (matchlen > wordlen) {
 120                         ftpvis(insertstr, sizeof(insertstr),
 121                             lastmatch + wordlen, matchlen - wordlen);
 122                         if (el_insertstr(el, insertstr) == -1)
 123                                 return (CC_ERROR);
 124                         else
 125                                 return (CC_REFRESH_BEEP);
 126                 }
 127         }
 128
 129         putc('\n', ttyout);
 130         qsort(words->sl_str, words->sl_cur, sizeof(char *), comparstr);
 131         list_vertical(words);
 132         return (CC_REDISPLAY);
 133 }
 134
 135 /*
 136  * Complete a command
 137  */
 138 static unsigned char
 139 complete_command(char *word, int list)
 140 {
 141         struct cmd *c;
 142         StringList *words;
 143         size_t wordlen;
 144         unsigned char rv;
 145
 146         words = ftp_sl_init();
 147         wordlen = strlen(word);
 148
 149         for (c = cmdtab; c->c_name != NULL; c++) {
 150                 if (wordlen > strlen(c->c_name))
 151                         continue;
 152                 if (strncmp(word, c->c_name, wordlen) == 0)
 153                         ftp_sl_add(words, c->c_name);
 154         }
 155
 156         rv = complete_ambiguous(word, list, words);
 157         if (rv == CC_REFRESH) {
 158                 if (el_insertstr(el, " ") == -1)
 159                         rv = CC_ERROR;
 160         }
 161         sl_free(words, 0);
 162         return (rv);
 163 }
 164
 165 /*
 166  * Complete a local file
 167  */
 168 static unsigned char
 169 complete_local(char *word, int list)
 170 {
 171         StringList *words;
 172         char dir[MAXPATHLEN];
 173         char *file;
 174         DIR *dd;
 175         struct dirent *dp;
 176         unsigned char rv;
 177         size_t len;
 178
 179         if ((file = strrchr(word, '/')) == NULL) {
 180                 dir[0] = '.';
 181                 dir[1] = '\0';
 182                 file = word;
 183         } else {
 184                 if (file == word) {
 185                         dir[0] = '/';
 186                         dir[1] = '\0';
 187                 } else
 188                         (void)strlcpy(dir, word, file - word + 1);
 189                 file++;
 190         }
 191         if (dir[0] == '~') {
 192                 char *p;
 193
 194                 if ((p = globulize(dir)) == NULL)
 195                         return (CC_ERROR);
 196                 (void)strlcpy(dir, p, sizeof(dir));
 197                 free(p);
 198         }
 199
 200         if ((dd = opendir(dir)) == NULL)
 201                 return (CC_ERROR);
 202
 203         words = ftp_sl_init();
 204         len = strlen(file);
 205
 206         for (dp = readdir(dd); dp != NULL; dp = readdir(dd)) {
 207                 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
 208                         continue;
 209
 210 #if defined(DIRENT_MISSING_D_NAMLEN)
 211                 if (len > strlen(dp->d_name))
 212                         continue;
 213 #else
 214                 if (len > dp->d_namlen)
 215                         continue;
 216 #endif
 217                 if (strncmp(file, dp->d_name, len) == 0) {
 218                         char *tcp;
 219
 220                         tcp = ftp_strdup(dp->d_name);
 221                         ftp_sl_add(words, tcp);
 222                 }
 223         }
 224         closedir(dd);
 225
 226         rv = complete_ambiguous(file, list, words);
 227         if (rv == CC_REFRESH) {
 228                 struct stat sb;
 229                 char path[MAXPATHLEN];
 230
 231                 (void)strlcpy(path, dir,                sizeof(path));
 232                 (void)strlcat(path, "/",                sizeof(path));
 233                 (void)strlcat(path, words->sl_str[0],   sizeof(path));
 234
 235                 if (stat(path, &sb) >= 0) {
 236                         char suffix[2] = " ";
 237
 238                         if (S_ISDIR(sb.st_mode))
 239                                 suffix[0] = '/';
 240                         if (el_insertstr(el, suffix) == -1)
 241                                 rv = CC_ERROR;
 242                 }
 243         }
 244         sl_free(words, 1);
 245         return (rv);
 246 }
 247 /*
 248  * Complete an option
 249  */
 250 static unsigned char
 251 complete_option(char *word, int list)
 252 {
 253         struct option *o;
 254         StringList *words;
 255         size_t wordlen;
 256         unsigned char rv;
 257
 258         words = ftp_sl_init();
 259         wordlen = strlen(word);
 260
 261         for (o = optiontab; o->name != NULL; o++) {
 262                 if (wordlen > strlen(o->name))
 263                         continue;
 264                 if (strncmp(word, o->name, wordlen) == 0)
 265                         ftp_sl_add(words, o->name);
 266         }
 267
 268         rv = complete_ambiguous(word, list, words);
 269         if (rv == CC_REFRESH) {
 270                 if (el_insertstr(el, " ") == -1)
 271                         rv = CC_ERROR;
 272         }
 273         sl_free(words, 0);
 274         return (rv);
 275 }
 276
 277 /*
 278  * Complete a remote file
 279  */
 280 static unsigned char
 281 complete_remote(char *word, int list)
 282 {
 283         static StringList *dirlist;
 284         static char      lastdir[MAXPATHLEN];
 285         StringList      *words;
 286         char             dir[MAXPATHLEN];
 287         char            *file, *cp;
 288         int              i;
 289         unsigned char    rv;
 290
 291         char *dummyargv[] = { "complete", NULL, NULL };
 292         dummyargv[1] = dir;
 293
 294         if ((file = strrchr(word, '/')) == NULL) {
 295                 dir[0] = '\0';
 296                 file = word;
 297         } else {
 298                 cp = file;
 299                 while (*cp == '/' && cp > word)
 300                         cp--;
 301                 (void)strlcpy(dir, word, cp - word + 2);
 302                 file++;
 303         }
 304
 305         if (dirchange || dirlist == NULL ||
 306             strcmp(dir, lastdir) != 0) {                /* dir not cached */
 307                 const char *emesg;
 308
 309                 if (dirlist != NULL)
 310                         sl_free(dirlist, 1);
 311                 dirlist = ftp_sl_init();
 312
 313                 mflag = 1;
 314                 emesg = NULL;
 315                 while ((cp = remglob(dummyargv, 0, &emesg)) != NULL) {
 316                         char *tcp;
 317
 318                         if (!mflag)
 319                                 continue;
 320                         if (*cp == '\0') {
 321                                 mflag = 0;
 322                                 continue;
 323                         }
 324                         tcp = strrchr(cp, '/');
 325                         if (tcp)
 326                                 tcp++;
 327                         else
 328                                 tcp = cp;
 329                         tcp = ftp_strdup(tcp);
 330                         ftp_sl_add(dirlist, tcp);
 331                 }
 332                 if (emesg != NULL) {
 333                         fprintf(ttyout, "\n%s\n", emesg);
 334                         return (CC_REDISPLAY);
 335                 }
 336                 (void)strlcpy(lastdir, dir, sizeof(lastdir));
 337                 dirchange = 0;
 338         }
 339
 340         words = ftp_sl_init();
 341         for (i = 0; i < dirlist->sl_cur; i++) {
 342                 cp = dirlist->sl_str[i];
 343                 if (strlen(file) > strlen(cp))
 344                         continue;
 345                 if (strncmp(file, cp, strlen(file)) == 0)
 346                         ftp_sl_add(words, cp);
 347         }
 348         rv = complete_ambiguous(file, list, words);
 349         sl_free(words, 0);
 350         return (rv);
 351 }
 352
 353 /*
 354  * Generic complete routine
 355  */
 356 unsigned char
 357 complete(EditLine *el, int ch)
 358 {
 359         static char word[FTPBUFLEN];
 360         static int lastc_argc, lastc_argo;
 361
 362         struct cmd *c;
 363         const LineInfo *lf;
 364         int celems, dolist, cmpltype;
 365         size_t len;
 366
 367         lf = el_line(el);
 368         len = lf->lastchar - lf->buffer;
 369         if (len >= sizeof(line))
 370                 return (CC_ERROR);
 371         (void)strlcpy(line, lf->buffer, len + 1);
 372         cursor_pos = line + (lf->cursor - lf->buffer);
 373         lastc_argc = cursor_argc;       /* remember last cursor pos */
 374         lastc_argo = cursor_argo;
 375         makeargv();                     /* build argc/argv of current line */
 376
 377         if (cursor_argo >= sizeof(word))
 378                 return (CC_ERROR);
 379
 380         dolist = 0;
 381                         /* if cursor and word is same, list alternatives */
 382         if (lastc_argc == cursor_argc && lastc_argo == cursor_argo
 383             && strncmp(word, margv[cursor_argc] ? margv[cursor_argc] : "",
 384                         cursor_argo) == 0)
 385                 dolist = 1;
 386         else if (cursor_argc < margc)
 387                 (void)strlcpy(word, margv[cursor_argc], cursor_argo + 1);
 388         word[cursor_argo] = '\0';
 389
 390         if (cursor_argc == 0)
 391                 return (complete_command(word, dolist));
 392
 393         c = getcmd(margv[0]);
 394         if (c == (struct cmd *)-1 || c == 0)
 395                 return (CC_ERROR);
 396         celems = strlen(c->c_complete);
 397
 398                 /* check for 'continuation' completes (which are uppercase) */
 399         if ((cursor_argc > celems) && (celems > 0)
 400             && isupper((unsigned char) c->c_complete[celems-1]))
 401                 cursor_argc = celems;
 402
 403         if (cursor_argc > celems)
 404                 return (CC_ERROR);
 405
 406         cmpltype = c->c_complete[cursor_argc - 1];
 407         switch (cmpltype) {
 408                 case 'c':                       /* command complete */
 409                 case 'C':
 410                         return (complete_command(word, dolist));
 411                 case 'l':                       /* local complete */
 412                 case 'L':
 413                         return (complete_local(word, dolist));
 414                 case 'n':                       /* no complete */
 415                 case 'N':                       /* no complete */
 416                         return (CC_ERROR);
 417                 case 'o':                       /* local complete */
 418                 case 'O':
 419                         return (complete_option(word, dolist));
 420                 case 'r':                       /* remote complete */
 421                 case 'R':
 422                         if (connected != -1) {
 423                                 fputs("\nMust be logged in to complete.\n",
 424                                     ttyout);
 425                                 return (CC_REDISPLAY);
 426                         }
 427                         return (complete_remote(word, dolist));
 428                 default:
 429                         errx(1, "unknown complete type `%c'", cmpltype);
 430                         return (CC_ERROR);
 431         }
 432         /* NOTREACHED */
 433 }
 434
 435 #endif /* !NO_EDITCOMPLETE */