1 /* Parsing FTP `ls' output.
2 Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation,
5 This file is part of Wget.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
33 #include <sys/types.h>
41 /* Converts symbolic permissions to number-style ones, e.g. string
42 rwxr-xr-x to 755. For now, it knows nothing of
43 setuid/setgid/sticky. ACLs are ignored. */
45 symperms (const char *s)
51 for (i = 0; i < 3; i++, s += 3)
54 perms += (((s[0] == 'r') << 2) + ((s[1] == 'w') << 1) +
55 (s[2] == 'x' || s[2] == 's'));
61 /* Cleans a line of text so that it can be consistently parsed. Destroys
62 <CR> and <LF> in case that thay occur at the end of the line and
63 replaces all <TAB> character with <SPACE>. Returns the length of the
66 clean_line(char *line)
68 int len = strlen (line);
70 if (line[len - 1] == '\n')
72 if (line[len - 1] == '\r')
74 for ( ; *line ; line++ ) if (*line == '\t') *line = ' ';
78 /* Convert the Un*x-ish style directory listing stored in FILE to a
79 linked list of fileinfo (system-independent) entries. The contents
80 of FILE are considered to be produced by the standard Unix `ls -la'
81 output (whatever that might be). BSD (no group) and SYSV (with
82 group) listings are handled.
84 The time stamps are stored in a separate variable, time_t
85 compatible (I hope). The timezones are ignored. */
86 static struct fileinfo *
87 ftp_parse_unix_ls (const char *file, int ignore_perms)
90 static const char *months[] = {
91 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
92 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
94 int next, len, i, error, ignore;
95 int year, month, day; /* for time analysis */
97 struct tm timestruct, *tnow;
100 char *line, *tok; /* tokenizer */
101 struct fileinfo *dir, *l, cur; /* list creation */
103 fp = fopen (file, "rb");
106 logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
111 /* Line loop to end of file: */
112 while ((line = read_whole_line (fp)))
114 len = clean_line (line);
115 /* Skip if total... */
116 if (!strncasecmp (line, "total", 5))
121 /* Get the first token (permissions). */
122 tok = strtok (line, " ");
132 /* Decide whether we deal with a file or a directory. */
136 cur.type = FT_PLAINFILE;
137 DEBUGP (("PLAINFILE; "));
140 cur.type = FT_DIRECTORY;
141 DEBUGP (("DIRECTORY; "));
144 cur.type = FT_SYMLINK;
145 DEBUGP (("SYMLINK; "));
148 cur.type = FT_UNKNOWN;
149 DEBUGP (("UNKOWN; "));
164 /*cur.perms = 1023;*/ /* #### What is this? --hniksic */
167 DEBUGP (("implicit perms %0o; ", cur.perms));
171 cur.perms = symperms (tok + 1);
172 DEBUGP (("perms %0o; ", cur.perms));
175 error = ignore = 0; /* Erroneous and ignoring entries are
176 treated equally for now. */
177 year = hour = min = sec = 0; /* Silence the compiler. */
180 /* While there are tokens on the line, parse them. Next is the
181 number of tokens left until the filename.
183 Use the month-name token as the "anchor" (the place where the
184 position wrt the file name is "known"). When a month name is
185 encountered, `next' is set to 5. Also, the preceding
186 characters are parsed to get the file size.
188 This tactic is quite dubious when it comes to
189 internationalization issues (non-English month names), but it
191 while ((tok = strtok (NULL, " ")))
194 if (next < 0) /* a month name was not encountered */
196 for (i = 0; i < 12; i++)
197 if (!strcmp (tok, months[i]))
199 /* If we got a month, it means the token before it is the
200 size, and the filename is three tokens away. */
206 for (cur.size = 0; t > line && ISDIGIT (*t); mul *= 10, t--)
207 cur.size += mul * (*t - '0');
210 /* Something is seriously wrong. */
216 DEBUGP (("month: %s; ", months[month]));
219 else if (next == 4) /* days */
221 if (tok[1]) /* two-digit... */
222 day = 10 * (*tok - '0') + tok[1] - '0';
223 else /* ...or one-digit */
225 DEBUGP (("day: %d; ", day));
229 /* This ought to be either the time, or the year. Let's
232 If we have a number x, it's a year. If we have x:y,
233 it's hours and minutes. If we have x:y:z, z are
236 min = hour = sec = 0;
237 /* We must deal with digits. */
240 /* Suppose it's year. */
241 for (; ISDIGIT (*tok); tok++)
242 year = (*tok - '0') + 10 * year;
245 /* This means these were hours! */
249 /* Get the minutes... */
250 for (; ISDIGIT (*tok); tok++)
251 min = (*tok - '0') + 10 * min;
254 /* ...and the seconds. */
256 for (; ISDIGIT (*tok); tok++)
257 sec = (*tok - '0') + 10 * sec;
262 DEBUGP (("year: %d (no tm); ", year));
264 DEBUGP (("time: %02d:%02d:%02d (no yr); ", hour, min, sec));
266 else if (next == 2) /* The file name */
271 /* Since the file name may contain a SPC, it is possible
272 for strtok to handle it wrong. */
273 fnlen = strlen (tok);
274 if (fnlen < len - (tok - line))
276 /* So we have a SPC in the file name. Restore the
279 /* If the file is a symbolic link, it should have a
281 if (cur.type == FT_SYMLINK)
283 p = strstr (tok, " -> ");
289 cur.linkto = xstrdup (p + 4);
290 DEBUGP (("link to: %s\n", cur.linkto));
291 /* And separate it from the file name. */
295 /* If we have the filename, add it to the list of files or
297 /* "." and ".." are an exception! */
298 if (!strcmp (tok, ".") || !strcmp (tok, ".."))
300 DEBUGP (("\nIgnoring `.' and `..'; "));
304 /* Some FTP sites choose to have ls -F as their default
305 LIST output, which marks the symlinks with a trailing
306 `@', directory names with a trailing `/' and
307 executables with a trailing `*'. This is no problem
308 unless encountering a symbolic link ending with `@',
309 or an executable ending with `*' on a server without
310 default -F output. I believe these cases are very
312 fnlen = strlen (tok); /* re-calculate `fnlen' */
313 cur.name = (char *)xmalloc (fnlen + 1);
314 memcpy (cur.name, tok, fnlen + 1);
317 if (cur.type == FT_DIRECTORY && cur.name[fnlen - 1] == '/')
319 cur.name[fnlen - 1] = '\0';
320 DEBUGP (("trailing `/' on dir.\n"));
322 else if (cur.type == FT_SYMLINK && cur.name[fnlen - 1] == '@')
324 cur.name[fnlen - 1] = '\0';
325 DEBUGP (("trailing `@' on link.\n"));
327 else if (cur.type == FT_PLAINFILE
328 && (cur.perms & 0111)
329 && cur.name[fnlen - 1] == '*')
331 cur.name[fnlen - 1] = '\0';
332 DEBUGP (("trailing `*' on exec.\n"));
343 if (!cur.name || (cur.type == FT_SYMLINK && !cur.linkto))
350 DEBUGP (("Skipping.\n"));
351 FREE_MAYBE (cur.name);
352 FREE_MAYBE (cur.linkto);
359 l = dir = (struct fileinfo *)xmalloc (sizeof (struct fileinfo));
360 memcpy (l, &cur, sizeof (cur));
361 l->prev = l->next = NULL;
366 l->next = (struct fileinfo *)xmalloc (sizeof (struct fileinfo));
368 memcpy (l, &cur, sizeof (cur));
371 /* Get the current time. */
372 timenow = time (NULL);
373 tnow = localtime (&timenow);
374 /* Build the time-stamp (the idea by zaga@fly.cc.fer.hr). */
375 timestruct.tm_sec = sec;
376 timestruct.tm_min = min;
377 timestruct.tm_hour = hour;
378 timestruct.tm_mday = day;
379 timestruct.tm_mon = month;
382 /* Some listings will not specify the year if it is "obvious"
383 that the file was from the previous year. E.g. if today
384 is 97-01-12, and you see a file of Dec 15th, its year is
385 1996, not 1997. Thanks to Vladimir Volovich for
387 if (month > tnow->tm_mon)
388 timestruct.tm_year = tnow->tm_year - 1;
390 timestruct.tm_year = tnow->tm_year;
393 timestruct.tm_year = year;
394 if (timestruct.tm_year >= 1900)
395 timestruct.tm_year -= 1900;
396 timestruct.tm_wday = 0;
397 timestruct.tm_yday = 0;
398 timestruct.tm_isdst = -1;
399 l->tstamp = mktime (×truct); /* store the time-stamp */
408 static struct fileinfo *
409 ftp_parse_winnt_ls (const char *file)
413 int year, month, day; /* for time analysis */
415 struct tm timestruct;
417 char *line, *tok; /* tokenizer */
418 struct fileinfo *dir, *l, cur; /* list creation */
420 fp = fopen (file, "rb");
423 logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
428 /* Line loop to end of file: */
429 while ((line = read_whole_line (fp)))
431 len = clean_line (line);
433 /* Extracting name is a bit of black magic and we have to do it
434 before `strtok' inserted extra \0 characters in the line
435 string. For the moment let us just suppose that the name starts at
436 column 39 of the listing. This way we could also recognize
437 filenames that begin with a series of space characters (but who
438 really wants to use such filenames anyway?). */
439 if (len < 40) continue;
441 cur.name = xstrdup(tok);
442 DEBUGP(("Name: '%s'\n", cur.name));
444 /* First column: mm-dd-yy */
445 tok = strtok(line, "-");
447 tok = strtok(NULL, "-");
449 tok = strtok(NULL, " ");
451 /* Assuming the epoch starting at 1.1.1970 */
452 if (year <= 70) year += 100;
454 /* Second column: hh:mm[AP]M, listing does not contain value for
456 tok = strtok(NULL, ":");
458 tok = strtok(NULL, "M");
460 /* Adjust hour from AM/PM. Just for the record, the sequence goes
461 11:00AM, 12:00PM, 01:00PM ... 11:00PM, 12:00AM, 01:00AM . */
463 if (hour == 12) hour = 0;
464 if (*tok == 'P') hour += 12;
466 DEBUGP(("YYYY/MM/DD HH:MM - %d/%02d/%02d %02d:%02d\n",
467 year+1900, month, day, hour, min));
469 /* Build the time-stamp (copy & paste from above) */
470 timestruct.tm_sec = 0;
471 timestruct.tm_min = min;
472 timestruct.tm_hour = hour;
473 timestruct.tm_mday = day;
474 timestruct.tm_mon = month;
475 timestruct.tm_year = year;
476 timestruct.tm_wday = 0;
477 timestruct.tm_yday = 0;
478 timestruct.tm_isdst = -1;
479 cur.tstamp = mktime (×truct); /* store the time-stamp */
481 DEBUGP(("Timestamp: %ld\n", cur.tstamp));
483 /* Third column: Either file length, or <DIR>. We also set the
484 permissions (guessed as 0644 for plain files and 0755 for
485 directories as the listing does not give us a clue) and filetype
487 tok = strtok(NULL, " ");
488 while (*tok == '\0') tok = strtok(NULL, " ");
491 cur.type = FT_DIRECTORY;
494 DEBUGP(("Directory\n"));
498 cur.type = FT_PLAINFILE;
499 cur.size = atoi(tok);
501 DEBUGP(("File, size %ld bytes\n", cur.size));
506 /* And put everything into the linked list */
509 l = dir = (struct fileinfo *)xmalloc (sizeof (struct fileinfo));
510 memcpy (l, &cur, sizeof (cur));
511 l->prev = l->next = NULL;
516 l->next = (struct fileinfo *)xmalloc (sizeof (struct fileinfo));
518 memcpy (l, &cur, sizeof (cur));
529 /* Converts VMS symbolic permissions to number-style ones, e.g. string
530 RWED,RWE,RE to 755. "D" (delete) is taken to be equal to "W"
531 (write). Inspired by a patch of Stoyan Lekov <lekov@eda.bg>. */
533 vmsperms (const char *s)
540 case ',': perms <<= 3; break;
541 case 'R': perms |= 4; break;
542 case 'W': perms |= 2; break;
543 case 'D': perms |= 2; break;
544 case 'E': perms |= 1; break;
545 default: DEBUGP(("wrong VMS permissons!\n"));
553 static struct fileinfo *
554 ftp_parse_vms_ls (const char *file)
557 /* #### A third copy of more-or-less the same array ? */
558 static const char *months[] = {
559 "JAN", "FEB", "MAR", "APR", "MAY", "JUN",
560 "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"
563 int year, month, day; /* for time analysis */
565 struct tm timestruct;
567 char *line, *tok; /* tokenizer */
568 struct fileinfo *dir, *l, cur; /* list creation */
570 fp = fopen (file, "rb");
573 logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
579 read_whole_line (fp);
580 /* "Directory PUB$DEVICE[PUB]" */
581 read_whole_line (fp);
583 read_whole_line (fp);
585 /* Line loop to end of file: */
586 while ((line = read_whole_line (fp)))
589 i = clean_line (line);
592 /* First column: Name. A bit of black magic again. The name my be
593 either ABCD.EXT or ABCD.EXT;NUM and it might be on a separate
594 line. Therefore we will first try to get the complete name
595 until the first space character; if it fails, we assume that the name
596 occupies the whole line. After that we search for the version
597 separator ";", we remove it and check the extension of the file;
598 extension .DIR denotes directory. */
600 tok = strtok(line, " ");
601 if (tok == NULL) tok = line;
602 DEBUGP(("file name: '%s'\n", tok));
603 for (p = tok ; *p && *p != ';' ; p++);
604 if (*p == ';') *p = '\0';
605 p = tok + strlen(tok) - 4;
606 if (!strcmp(p, ".DIR")) *p = '\0';
607 cur.name = xstrdup(tok);
608 DEBUGP(("Name: '%s'\n", cur.name));
610 /* If the name ends on .DIR or .DIR;#, it's a directory. We also set
611 the file size to zero as the listing does tell us only the size in
612 filesystem blocks - for an integrity check (when mirroring, for
613 example) we would need the size in bytes. */
617 cur.type = FT_DIRECTORY;
619 DEBUGP(("Directory\n"));
623 cur.type = FT_PLAINFILE;
629 /* Second column, if exists, or the first column of the next line
630 contain file size in blocks. We will skip it. */
632 tok = strtok(NULL, " ");
635 DEBUGP(("Getting additional line\n"));
637 line = read_whole_line (fp);
640 DEBUGP(("empty line read, leaving listing parser\n"));
643 i = clean_line (line);
646 DEBUGP(("confusing VMS listing item, leaving listing parser\n"));
649 tok = strtok(line, " ");
651 DEBUGP(("second token: '%s'\n", tok));
653 /* Third/Second column: Date DD-MMM-YYYY. */
655 tok = strtok(NULL, "-");
656 DEBUGP(("day: '%s'\n",tok));
658 tok = strtok(NULL, "-");
661 /* If the server produces garbage like
662 'EA95_0PS.GZ;1 No privilege for attempted operation'
663 the first strtok(NULL, "-") will return everything until the end
664 of the line and only the next strtok() call will return NULL. */
665 DEBUGP(("nonsense in VMS listing, skipping this line\n"));
668 for (i=0; i<12; i++) if (!strcmp(tok,months[i])) break;
669 /* Uknown months are mapped to January */
671 tok = strtok(NULL, " ");
672 year = atoi(tok)-1900;
673 DEBUGP(("date parsed\n"));
675 /* Fourth/Third column: Time hh:mm[:ss] */
676 tok = strtok (NULL, " ");
677 hour = min = sec = 0;
680 for (; *p && *p != ':'; ++p);
683 for (; *p && *p != ':'; ++p);
687 DEBUGP(("YYYY/MM/DD HH:MM:SS - %d/%02d/%02d %02d:%02d:%02d\n",
688 year+1900, month, day, hour, min, sec));
690 /* Build the time-stamp (copy & paste from above) */
691 timestruct.tm_sec = sec;
692 timestruct.tm_min = min;
693 timestruct.tm_hour = hour;
694 timestruct.tm_mday = day;
695 timestruct.tm_mon = month;
696 timestruct.tm_year = year;
697 timestruct.tm_wday = 0;
698 timestruct.tm_yday = 0;
699 timestruct.tm_isdst = -1;
700 cur.tstamp = mktime (×truct); /* store the time-stamp */
702 DEBUGP(("Timestamp: %ld\n", cur.tstamp));
704 /* Skip the fifth column */
706 tok = strtok(NULL, " ");
708 /* Sixth column: Permissions */
710 tok = strtok(NULL, ","); /* Skip the VMS-specific SYSTEM permissons */
711 tok = strtok(NULL, ")");
714 DEBUGP(("confusing VMS permissions, skipping line\n"));
717 /* Permissons have the format "RWED,RWED,RE" */
718 cur.perms = vmsperms(tok);
719 DEBUGP(("permissions: %s -> 0%o\n", tok, cur.perms));
723 /* And put everything into the linked list */
726 l = dir = (struct fileinfo *)xmalloc (sizeof (struct fileinfo));
727 memcpy (l, &cur, sizeof (cur));
728 l->prev = l->next = NULL;
733 l->next = (struct fileinfo *)xmalloc (sizeof (struct fileinfo));
735 memcpy (l, &cur, sizeof (cur));
747 /* This function switches between the correct parsing routine depending on
748 the SYSTEM_TYPE. The system type should be based on the result of the
749 "SYST" response of the FTP server. According to this repsonse we will
750 use on of the three different listing parsers that cover the most of FTP
751 servers used nowadays. */
754 ftp_parse_ls (const char *file, const enum stype system_type)
759 return ftp_parse_unix_ls (file, FALSE);
762 /* Detect whether the listing is simulating the UNIX format */
765 fp = fopen (file, "rb");
768 logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
773 /* If the first character of the file is '0'-'9', it's WINNT
775 if (c >= '0' && c <='9')
776 return ftp_parse_winnt_ls (file);
778 return ftp_parse_unix_ls (file, TRUE);
781 return ftp_parse_vms_ls (file);
783 return ftp_parse_unix_ls (file, TRUE);
785 logprintf (LOG_NOTQUIET, _("\
786 Usupported listing type, trying Unix listing parser.\n"));
787 return ftp_parse_unix_ls (file, FALSE);
791 /* Stuff for creating FTP index. */
793 /* The function creates an HTML index containing references to given
794 directories and files on the appropriate host. The references are
797 ftp_index (const char *file, struct urlinfo *u, struct fileinfo *f)
801 char *htclfile; /* HTML-clean file name */
805 fp = fopen (file, "wb");
808 logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
816 char *tmpu, *tmpp; /* temporary, clean user and passwd */
818 tmpu = encode_string (u->user);
819 tmpp = u->passwd ? encode_string (u->passwd) : NULL;
820 upwd = (char *)xmalloc (strlen (tmpu)
821 + (tmpp ? (1 + strlen (tmpp)) : 0) + 2);
822 sprintf (upwd, "%s%s%s@", tmpu, tmpp ? ":" : "", tmpp ? tmpp : "");
828 fprintf (fp, "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n");
829 fprintf (fp, "<html>\n<head>\n<title>");
830 fprintf (fp, _("Index of /%s on %s:%d"), u->dir, u->host, u->port);
831 fprintf (fp, "</title>\n</head>\n<body>\n<h1>");
832 fprintf (fp, _("Index of /%s on %s:%d"), u->dir, u->host, u->port);
833 fprintf (fp, "</h1>\n<hr>\n<pre>\n");
839 /* #### Should we translate the months? */
840 static char *months[] = {
841 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
842 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
844 struct tm *ptm = localtime ((time_t *)&f->tstamp);
846 fprintf (fp, "%d %s %02d ", ptm->tm_year + 1900, months[ptm->tm_mon],
849 fprintf (fp, "%02d:%02d ", ptm->tm_hour, ptm->tm_min);
854 fprintf (fp, _("time unknown "));
858 fprintf (fp, _("File "));
861 fprintf (fp, _("Directory "));
864 fprintf (fp, _("Link "));
867 fprintf (fp, _("Not sure "));
870 htclfile = html_quote_string (f->name);
871 fprintf (fp, "<a href=\"ftp://%s%s:%hu", upwd, u->host, u->port);
874 fprintf (fp, "%s", u->dir);
877 fprintf (fp, "%s", htclfile);
878 if (f->type == FT_DIRECTORY)
880 fprintf (fp, "\">%s", htclfile);
881 if (f->type == FT_DIRECTORY)
883 fprintf (fp, "</a> ");
884 if (f->type == FT_PLAINFILE)
885 fprintf (fp, _(" (%s bytes)"), legible (f->size));
886 else if (f->type == FT_SYMLINK)
887 fprintf (fp, "-> %s", f->linkto ? f->linkto : "(nil)");
892 fprintf (fp, "</pre>\n</body>\n</html>\n");