Annotation of src/usr.bin/ftp/complete.c, Revision 1.24
1.24 ! stsp 1: /* $OpenBSD: complete.c,v 1.23 2009/05/05 19:35:30 martynas Exp $ */
1.9 millert 2: /* $NetBSD: complete.c,v 1.10 1997/08/18 10:20:18 lukem Exp $ */
1.1 millert 3:
4: /*-
5: * Copyright (c) 1997 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Luke Mewburn.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.9 millert 23: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.1 millert 25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30: * POSSIBILITY OF SUCH DAMAGE.
31: */
32:
1.5 millert 33: #ifndef SMALL
1.1 millert 34:
35: /*
36: * FTP user program - command and file completion routines
37: */
38:
39: #include <ctype.h>
40: #include <err.h>
41: #include <dirent.h>
42: #include <stdio.h>
43: #include <stdlib.h>
44: #include <string.h>
45:
46: #include "ftp_var.h"
47:
1.13 millert 48: static int comparstr(const void *, const void *);
49: static unsigned char complete_ambiguous(char *, int, StringList *);
50: static unsigned char complete_command(char *, int);
51: static unsigned char complete_local(char *, int);
52: static unsigned char complete_remote(char *, int);
1.24 ! stsp 53: static void ftpvis(char *, size_t, const char *, size_t);
1.8 millert 54:
1.1 millert 55: static int
1.16 deraadt 56: comparstr(const void *a, const void *b)
1.1 millert 57: {
1.4 millert 58: return (strcmp(*(char **)a, *(char **)b));
1.1 millert 59: }
60:
61: /*
62: * Determine if complete is ambiguous. If unique, insert.
63: * If no choices, error. If unambiguous prefix, insert that.
64: * Otherwise, list choices. words is assumed to be filtered
65: * to only contain possible choices.
66: * Args:
67: * word word which started the match
68: * list list by default
69: * words stringlist containing possible matches
70: */
71: static unsigned char
1.16 deraadt 72: complete_ambiguous(char *word, int list, StringList *words)
1.1 millert 73: {
1.24 ! stsp 74: char insertstr[MAXPATHLEN * 2];
1.1 millert 75: char *lastmatch;
1.8 millert 76: int i, j;
77: size_t matchlen, wordlen;
1.1 millert 78:
79: wordlen = strlen(word);
80: if (words->sl_cur == 0)
1.4 millert 81: return (CC_ERROR); /* no choices available */
1.1 millert 82:
83: if (words->sl_cur == 1) { /* only once choice available */
1.24 ! stsp 84: char *p = words->sl_str[0] + wordlen;
! 85: ftpvis(insertstr, sizeof(insertstr), p, strlen(p));
! 86: if (el_insertstr(el, insertstr) == -1)
1.4 millert 87: return (CC_ERROR);
1.1 millert 88: else
1.4 millert 89: return (CC_REFRESH);
1.1 millert 90: }
91:
92: if (!list) {
93: matchlen = 0;
94: lastmatch = words->sl_str[0];
95: matchlen = strlen(lastmatch);
96: for (i = 1 ; i < words->sl_cur ; i++) {
97: for (j = wordlen ; j < strlen(words->sl_str[i]); j++)
98: if (lastmatch[j] != words->sl_str[i][j])
99: break;
100: if (j < matchlen)
101: matchlen = j;
102: }
103: if (matchlen > wordlen) {
1.24 ! stsp 104: ftpvis(insertstr, sizeof(insertstr),
! 105: lastmatch + wordlen, matchlen);
! 106: if (el_insertstr(el, insertstr) == -1)
1.4 millert 107: return (CC_ERROR);
1.1 millert 108: else
109: /*
110: * XXX: really want CC_REFRESH_BEEP
111: */
1.4 millert 112: return (CC_REFRESH);
1.1 millert 113: }
114: }
115:
1.7 deraadt 116: putc('\n', ttyout);
1.1 millert 117: qsort(words->sl_str, words->sl_cur, sizeof(char *), comparstr);
118: list_vertical(words);
1.4 millert 119: return (CC_REDISPLAY);
1.1 millert 120: }
121:
122: /*
123: * Complete a command
124: */
125: static unsigned char
1.16 deraadt 126: complete_command(char *word, int list)
1.1 millert 127: {
128: struct cmd *c;
129: StringList *words;
1.8 millert 130: size_t wordlen;
1.1 millert 131: unsigned char rv;
132:
133: words = sl_init();
134: wordlen = strlen(word);
135:
136: for (c = cmdtab; c->c_name != NULL; c++) {
137: if (wordlen > strlen(c->c_name))
138: continue;
139: if (strncmp(word, c->c_name, wordlen) == 0)
140: sl_add(words, c->c_name);
141: }
142:
143: rv = complete_ambiguous(word, list, words);
144: sl_free(words, 0);
1.4 millert 145: return (rv);
1.1 millert 146: }
147:
148: /*
149: * Complete a local file
150: */
151: static unsigned char
1.16 deraadt 152: complete_local(char *word, int list)
1.1 millert 153: {
154: StringList *words;
1.3 millert 155: char dir[MAXPATHLEN];
1.1 millert 156: char *file;
157: DIR *dd;
158: struct dirent *dp;
159: unsigned char rv;
160:
161: if ((file = strrchr(word, '/')) == NULL) {
1.5 millert 162: dir[0] = '.';
163: dir[1] = '\0';
1.1 millert 164: file = word;
165: } else {
1.5 millert 166: if (file == word) {
167: dir[0] = '/';
168: dir[1] = '\0';
169: } else {
1.11 lebel 170: (void)strlcpy(dir, word, (size_t)(file - word) + 1);
1.1 millert 171: }
1.5 millert 172: file++;
1.1 millert 173: }
174:
175: if ((dd = opendir(dir)) == NULL)
1.4 millert 176: return (CC_ERROR);
1.1 millert 177:
178: words = sl_init();
179:
180: for (dp = readdir(dd); dp != NULL; dp = readdir(dd)) {
181: if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
182: continue;
183: if (strlen(file) > dp->d_namlen)
184: continue;
185: if (strncmp(file, dp->d_name, strlen(file)) == 0) {
186: char *tcp;
187:
188: tcp = strdup(dp->d_name);
189: if (tcp == NULL)
190: errx(1, "Can't allocate memory for local dir");
191: sl_add(words, tcp);
192: }
193: }
194: closedir(dd);
195:
196: rv = complete_ambiguous(file, list, words);
197: sl_free(words, 1);
1.4 millert 198: return (rv);
1.1 millert 199: }
200:
201: /*
202: * Complete a remote file
203: */
204: static unsigned char
1.16 deraadt 205: complete_remote(char *word, int list)
1.1 millert 206: {
207: static StringList *dirlist;
1.3 millert 208: static char lastdir[MAXPATHLEN];
1.1 millert 209: StringList *words;
1.3 millert 210: char dir[MAXPATHLEN];
1.1 millert 211: char *file, *cp;
1.4 millert 212: int i;
1.1 millert 213: unsigned char rv;
214:
215: char *dummyargv[] = { "complete", dir, NULL };
216:
217: if ((file = strrchr(word, '/')) == NULL) {
1.5 millert 218: dir[0] = '.';
219: dir[1] = '\0';
1.1 millert 220: file = word;
221: } else {
1.4 millert 222: cp = file;
223: while (*cp == '/' && cp > word)
224: cp--;
1.11 lebel 225: (void)strlcpy(dir, word, (size_t)(cp - word + 2));
1.1 millert 226: file++;
227: }
228:
229: if (dirchange || strcmp(dir, lastdir) != 0) { /* dir not cached */
1.4 millert 230: char *emesg;
231:
1.19 steven 232: sl_free(dirlist, 1);
1.1 millert 233: dirlist = sl_init();
234:
235: mflag = 1;
1.4 millert 236: emesg = NULL;
1.10 millert 237: if (debug)
238: (void)putc('\n', ttyout);
1.4 millert 239: while ((cp = remglob(dummyargv, 0, &emesg)) != NULL) {
1.1 millert 240: char *tcp;
241:
242: if (!mflag)
243: continue;
244: if (*cp == '\0') {
245: mflag = 0;
246: continue;
247: }
1.8 millert 248: tcp = strrchr(cp, '/');
249: if (tcp)
250: tcp++;
251: else
252: tcp = cp;
253: tcp = strdup(tcp);
1.1 millert 254: if (tcp == NULL)
255: errx(1, "Can't allocate memory for remote dir");
256: sl_add(dirlist, tcp);
257: }
1.4 millert 258: if (emesg != NULL) {
1.7 deraadt 259: fprintf(ttyout, "\n%s\n", emesg);
1.4 millert 260: return (CC_REDISPLAY);
261: }
1.14 deraadt 262: (void)strlcpy(lastdir, dir, sizeof lastdir);
1.1 millert 263: dirchange = 0;
264: }
265:
266: words = sl_init();
267: for (i = 0; i < dirlist->sl_cur; i++) {
268: cp = dirlist->sl_str[i];
1.4 millert 269: if (strlen(file) > strlen(cp))
1.1 millert 270: continue;
1.4 millert 271: if (strncmp(file, cp, strlen(file)) == 0)
272: sl_add(words, cp);
1.1 millert 273: }
274: rv = complete_ambiguous(file, list, words);
275: sl_free(words, 0);
1.4 millert 276: return (rv);
1.1 millert 277: }
278:
279: /*
280: * Generic complete routine
281: */
282: unsigned char
1.16 deraadt 283: complete(EditLine *el, int ch)
1.1 millert 284: {
285: static char word[FTPBUFLEN];
286: static int lastc_argc, lastc_argo;
287: struct cmd *c;
288: const LineInfo *lf;
1.8 millert 289: int celems, dolist;
290: size_t len;
1.1 millert 291:
1.17 deraadt 292: ch = ch; /* not used */
1.1 millert 293: lf = el_line(el);
294: len = lf->lastchar - lf->buffer;
295: if (len >= sizeof(line))
1.4 millert 296: return (CC_ERROR);
1.15 millert 297: (void)memcpy(line, lf->buffer, len);
298: line[len] = '\0';
1.1 millert 299: cursor_pos = line + (lf->cursor - lf->buffer);
300: lastc_argc = cursor_argc; /* remember last cursor pos */
301: lastc_argo = cursor_argo;
302: makeargv(); /* build argc/argv of current line */
303:
304: if (cursor_argo >= sizeof(word))
1.4 millert 305: return (CC_ERROR);
1.1 millert 306:
307: dolist = 0;
308: /* if cursor and word is same, list alternatives */
309: if (lastc_argc == cursor_argc && lastc_argo == cursor_argo
310: && strncmp(word, margv[cursor_argc], cursor_argo) == 0)
311: dolist = 1;
1.12 millert 312: else if (cursor_argo)
313: memcpy(word, margv[cursor_argc], cursor_argo);
314: word[cursor_argo] = '\0';
1.1 millert 315:
316: if (cursor_argc == 0)
1.4 millert 317: return (complete_command(word, dolist));
1.1 millert 318:
319: c = getcmd(margv[0]);
320: if (c == (struct cmd *)-1 || c == 0)
1.4 millert 321: return (CC_ERROR);
1.1 millert 322: celems = strlen(c->c_complete);
323:
324: /* check for 'continuation' completes (which are uppercase) */
325: if ((cursor_argc > celems) && (celems > 0)
326: && isupper(c->c_complete[celems-1]))
327: cursor_argc = celems;
328:
329: if (cursor_argc > celems)
1.4 millert 330: return (CC_ERROR);
1.1 millert 331:
332: switch (c->c_complete[cursor_argc - 1]) {
1.17 deraadt 333: case 'l': /* local complete */
334: case 'L':
335: return (complete_local(word, dolist));
336: case 'r': /* remote complete */
337: case 'R':
338: if (connected != -1) {
339: fputs("\nMust be logged in to complete.\n", ttyout);
340: return (CC_REDISPLAY);
341: }
342: return (complete_remote(word, dolist));
343: case 'c': /* command complete */
344: case 'C':
345: return (complete_command(word, dolist));
346: case 'n': /* no complete */
347: return (CC_ERROR);
1.1 millert 348: }
349:
1.4 millert 350: return (CC_ERROR);
1.24 ! stsp 351: }
! 352:
! 353: /*
! 354: * Copy characters from src into dst, \ quoting characters that require it.
! 355: */
! 356: static void
! 357: ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen)
! 358: {
! 359: size_t di, si;
! 360:
! 361: /* paranoia paranoia everybody's trying to get me */
! 362: if (dstlen == 0)
! 363: return;
! 364: if (srclen == 0) {
! 365: dst[0] = '\0';
! 366: return;
! 367: }
! 368:
! 369: di = si = 0;
! 370: while (src[si] != '\0' && di < dstlen && si < srclen) {
! 371: switch (src[si]) {
! 372: case '\\':
! 373: case ' ':
! 374: case '\t':
! 375: case '\r':
! 376: case '\n':
! 377: case '"':
! 378: /* Need room for two characters and NUL, avoiding
! 379: * incomplete escape sequences at end of dst. */
! 380: if (di >= dstlen - 3)
! 381: break;
! 382: dst[di++] = '\\';
! 383: /* FALLTHROUGH */
! 384: default:
! 385: dst[di] = src[si++];
! 386: if (di < dstlen)
! 387: di++;
! 388: }
! 389: }
! 390: dst[di] = '\0';
1.1 millert 391: }
1.8 millert 392:
393: #endif /* !SMALL */
1.23 martynas 394:
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