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Diffstat (limited to 'src/ftp-ls.c')
| -rw-r--r-- | src/ftp-ls.c | 1175 |
1 files changed, 1175 insertions, 0 deletions
diff --git a/src/ftp-ls.c b/src/ftp-ls.c new file mode 100644 index 0000000..bb25754 --- /dev/null +++ b/src/ftp-ls.c @@ -0,0 +1,1175 @@ +/* Parsing FTP `ls' output. + Copyright (C) 1996-2011, 2015, 2018-2020 Free Software Foundation, + Inc. + +This file is part of GNU Wget. + +GNU Wget is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3 of the License, or +(at your option) any later version. + +GNU Wget is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with Wget. If not, see <http://www.gnu.org/licenses/>. + +Additional permission under GNU GPL version 3 section 7 + +If you modify this program, or any covered work, by linking or +combining it with the OpenSSL project's OpenSSL library (or a +modified version of that library), containing parts covered by the +terms of the OpenSSL or SSLeay licenses, the Free Software Foundation +grants you additional permission to convey the resulting work. +Corresponding Source for a non-source form of such a combination +shall include the source code for the parts of OpenSSL used as well +as that of the covered work. */ + +#include "wget.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> +#include <time.h> +#include "utils.h" +#include "ftp.h" +#include "url.h" +#include "convert.h" /* for html_quote_string prototype */ +#include "retr.h" /* for output_stream */ +#include "c-strcase.h" + +/* Converts symbolic permissions to number-style ones, e.g. string + rwxr-xr-x to 755. For now, it knows nothing of + setuid/setgid/sticky. ACLs are ignored. */ +static int +symperms (const char *s) +{ + int perms = 0, i; + + if (strlen (s) < 9) + return 0; + for (i = 0; i < 3; i++, s += 3) + { + perms <<= 3; + perms += (((s[0] == 'r') << 2) + ((s[1] == 'w') << 1) + + (s[2] == 'x' || s[2] == 's')); + } + return perms; +} + + +/* Cleans a line of text so that it can be consistently parsed. Destroys + <CR> and <LF> in case that they occur at the end of the line and + replaces all <TAB> character with <SPACE>. Returns the length of the + modified line. */ +static int +clean_line (char *line, int len) +{ + if (len <= 0) return 0; + + while (len > 0 && (line[len - 1] == '\n' || line[len - 1] == '\r')) + line[--len] = '\0'; + + if (!len) return 0; + + for ( ; *line ; line++ ) if (*line == '\t') *line = ' '; + + return len; +} + +/* Convert the Un*x-ish style directory listing stored in FILE to a + linked list of fileinfo (system-independent) entries. The contents + of FILE are considered to be produced by the standard Unix `ls -la' + output (whatever that might be). BSD (no group) and SYSV (with + group) listings are handled. + + The time stamps are stored in a separate variable, time_t + compatible (I hope). The timezones are ignored. */ +static struct fileinfo * +ftp_parse_unix_ls (FILE *fp, int ignore_perms) +{ + static const char *months[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }; + int next, len, i, error, ignore; + int year, month, day; /* for time analysis */ + int hour, min, sec, ptype; + struct tm timestruct, *tnow; + time_t timenow; + size_t bufsize = 0; + + char *line = NULL, *tok, *ptok; /* tokenizer */ + struct fileinfo *dir, *l, cur; /* list creation */ + + dir = l = NULL; + + /* Line loop to end of file: */ + while ((len = getline (&line, &bufsize, fp)) > 0) + { + len = clean_line (line, len); + /* Skip if total... */ + if (!c_strncasecmp (line, "total", 5)) + continue; + /* Get the first token (permissions). */ + tok = strtok (line, " "); + if (!tok) + continue; + + cur.name = NULL; + cur.linkto = NULL; + + /* Decide whether we deal with a file or a directory. */ + switch (*tok) + { + case '-': + cur.type = FT_PLAINFILE; + DEBUGP (("PLAINFILE; ")); + break; + case 'd': + cur.type = FT_DIRECTORY; + DEBUGP (("DIRECTORY; ")); + break; + case 'l': + cur.type = FT_SYMLINK; + DEBUGP (("SYMLINK; ")); + break; + default: + cur.type = FT_UNKNOWN; + DEBUGP (("UNKNOWN; ")); + break; + } + + if (ignore_perms) + { + switch (cur.type) + { + case FT_PLAINFILE: + cur.perms = 0644; + break; + case FT_DIRECTORY: + cur.perms = 0755; + break; + default: + /*cur.perms = 1023;*/ /* #### What is this? --hniksic */ + cur.perms = 0644; + } + DEBUGP (("implicit perms %0o; ", (unsigned) cur.perms)); + } + else + { + cur.perms = symperms (tok + 1); + DEBUGP (("perms %0o; ", (unsigned) cur.perms)); + } + + error = ignore = 0; /* Erroneous and ignoring entries are + treated equally for now. */ + year = hour = min = sec = 0; /* Silence the compiler. */ + month = day = 0; + ptype = TT_DAY; + next = -1; + /* While there are tokens on the line, parse them. Next is the + number of tokens left until the filename. + + Use the month-name token as the "anchor" (the place where the + position wrt the file name is "known"). When a month name is + encountered, `next' is set to 5. Also, the preceding + characters are parsed to get the file size. + + This tactic is quite dubious when it comes to + internationalization issues (non-English month names), but it + works for now. */ + tok = line; + while (ptok = tok, + (tok = strtok (NULL, " ")) != NULL) + { + --next; + if (next < 0) /* a month name was not encountered */ + { + for (i = 0; i < 12; i++) + if (!c_strcasecmp (tok, months[i])) + break; + /* If we got a month, it means the token before it is the + size, and the filename is three tokens away. */ + if (i != 12) + { + wgint size; + + /* Parse the previous token with str_to_wgint. */ + if (ptok == line) + { + /* Something has gone wrong during parsing. */ + error = 1; + break; + } + errno = 0; + size = str_to_wgint (ptok, NULL, 10); + if (size == WGINT_MAX && errno == ERANGE) + /* Out of range -- ignore the size. #### Should + we refuse to start the download. */ + cur.size = 0; + else + cur.size = size; + DEBUGP (("size: %s; ", number_to_static_string(cur.size))); + + month = i; + next = 5; + DEBUGP (("month: %s; ", months[month])); + } + } + else if (next == 4) /* days */ + { + if (tok[1]) /* two-digit... */ + day = 10 * (*tok - '0') + tok[1] - '0'; + else /* ...or one-digit */ + day = *tok - '0'; + DEBUGP (("day: %d; ", day)); + } + else if (next == 3) + { + /* This ought to be either the time, or the year. Let's + be flexible! + + If we have a number x, it's a year. If we have x:y, + it's hours and minutes. If we have x:y:z, z are + seconds. */ + year = 0; + min = hour = sec = 0; + /* We must deal with digits. */ + if (c_isdigit (*tok)) + { + /* Suppose it's year. Limit to year 99999 to avoid integer overflow. */ + for (; c_isdigit (*tok) && year <= 99999; tok++) + year = (*tok - '0') + 10 * year; + if (*tok == ':') + { + int n; + /* This means these were hours! */ + hour = year; + year = 0; + ptype = TT_HOUR_MIN; + ++tok; + /* Get the minutes... */ + for (n = 0; c_isdigit (*tok) && n < 2; tok++, n++) + min = (*tok - '0') + 10 * min; + if (*tok == ':') + { + /* ...and the seconds. */ + ++tok; + for (n = 0; c_isdigit (*tok) && n < 2; tok++, n++) + sec = (*tok - '0') + 10 * sec; + } + } + } + if (year) + DEBUGP (("year: %d (no tm); ", year)); + else + DEBUGP (("time: %02d:%02d:%02d (no yr); ", hour, min, sec)); + } + else if (next == 2) /* The file name */ + { + int fnlen; + char *p; + + /* Since the file name may contain a SPC, it is possible + for strtok to handle it wrong. */ + fnlen = strlen (tok); + if (fnlen < len - (tok - line)) + { + /* So we have a SPC in the file name. Restore the + original. */ + tok[fnlen] = ' '; + /* If the file is a symbolic link, it should have a + ` -> ' somewhere. */ + if (cur.type == FT_SYMLINK) + { + p = strstr (tok, " -> "); + if (!p) + { + error = 1; + break; + } + cur.linkto = xstrdup (p + 4); + DEBUGP (("link to: %s\n", cur.linkto)); + /* And separate it from the file name. */ + *p = '\0'; + } + } + /* If we have the filename, add it to the list of files or + directories. */ + /* "." and ".." are an exception! */ + if (!strcmp (tok, ".") || !strcmp (tok, "..")) + { + DEBUGP (("\nIgnoring `.' and `..'; ")); + ignore = 1; + break; + } + /* Some FTP sites choose to have ls -F as their default + LIST output, which marks the symlinks with a trailing + `@', directory names with a trailing `/' and + executables with a trailing `*'. This is no problem + unless encountering a symbolic link ending with `@', + or an executable ending with `*' on a server without + default -F output. I believe these cases are very + rare. */ + fnlen = strlen (tok); /* re-calculate `fnlen' */ + cur.name = xmalloc (fnlen + 1); + memcpy (cur.name, tok, fnlen + 1); + if (fnlen) + { + if (cur.type == FT_DIRECTORY && cur.name[fnlen - 1] == '/') + { + cur.name[fnlen - 1] = '\0'; + DEBUGP (("trailing `/' on dir.\n")); + } + else if (cur.type == FT_SYMLINK && cur.name[fnlen - 1] == '@') + { + cur.name[fnlen - 1] = '\0'; + DEBUGP (("trailing `@' on link.\n")); + } + else if (cur.type == FT_PLAINFILE + && (cur.perms & 0111) + && cur.name[fnlen - 1] == '*') + { + cur.name[fnlen - 1] = '\0'; + DEBUGP (("trailing `*' on exec.\n")); + } + } /* if (fnlen) */ + else + error = 1; + break; + } + else + abort (); + } /* while */ + + if (!cur.name || (cur.type == FT_SYMLINK && !cur.linkto)) + error = 1; + + DEBUGP (("%s\n", cur.name ? cur.name : "")); + + if (error || ignore) + { + DEBUGP (("Skipping.\n")); + xfree (cur.name); + xfree (cur.linkto); + continue; + } + + if (!dir) + { + l = dir = xnew (struct fileinfo); + memcpy (l, &cur, sizeof (cur)); + l->prev = l->next = NULL; + } + else + { + cur.prev = l; + l->next = xnew (struct fileinfo); + l = l->next; + memcpy (l, &cur, sizeof (cur)); + l->next = NULL; + } + /* Get the current time. */ + timenow = time (NULL); + tnow = localtime (&timenow); + /* Build the time-stamp (the idea by zaga@fly.cc.fer.hr). */ + timestruct.tm_sec = sec; + timestruct.tm_min = min; + timestruct.tm_hour = hour; + timestruct.tm_mday = day; + timestruct.tm_mon = month; + if (year == 0) + { + /* Some listings will not specify the year if it is "obvious" + that the file was from the previous year. E.g. if today + is 97-01-12, and you see a file of Dec 15th, its year is + 1996, not 1997. Thanks to Vladimir Volovich for + mentioning this! */ + if (month > tnow->tm_mon) + timestruct.tm_year = tnow->tm_year - 1; + else + timestruct.tm_year = tnow->tm_year; + } + else + timestruct.tm_year = year; + if (timestruct.tm_year >= 1900) + timestruct.tm_year -= 1900; + timestruct.tm_wday = 0; + timestruct.tm_yday = 0; + timestruct.tm_isdst = -1; + l->tstamp = mktime (×truct); /* store the time-stamp */ + l->ptype = ptype; + } + + xfree (line); + return dir; +} + +static struct fileinfo * +ftp_parse_winnt_ls (FILE *fp) +{ + int len; + int year, month, day; /* for time analysis */ + int hour, min; + size_t bufsize = 0; + struct tm timestruct; + + char *line = NULL, *tok; /* tokenizer */ + char *filename; + struct fileinfo *dir, *l, cur; /* list creation */ + + dir = l = NULL; + cur.name = NULL; + + /* Line loop to end of file: */ + while ((len = getline (&line, &bufsize, fp)) > 0) + { + len = clean_line (line, len); + + /* Name begins at 39 column of the listing if date presented in `mm-dd-yy' + format or at 41 column if date presented in `mm-dd-yyyy' format. Thus, + we cannot extract name before we parse date. Using this information we + also can recognize filenames that begin with a series of space + characters (but who really wants to use such filenames anyway?). */ + if (len < 40) continue; + filename = line + 39; + + /* First column: mm-dd-yy or mm-dd-yyyy. Should atoi() on the month fail, + january will be assumed. */ + tok = strtok(line, "-"); + if (tok == NULL) continue; + month = atoi(tok); + if (month < 0) month = 0; else month--; + tok = strtok(NULL, "-"); + if (tok == NULL) continue; + day = atoi(tok); + tok = strtok(NULL, " "); + if (tok == NULL) continue; + year = atoi(tok); + /* Assuming the epoch starting at 1.1.1970 */ + if (year <= 70) + { + year += 100; + } + else if (year >= 1900) + { + year -= 1900; + if (len < 42) continue; + filename += 2; + } + /* Now it is possible to determine the position of the first symbol in + filename. */ + xfree (cur.name); + memset(&cur, 0, sizeof (cur)); + cur.name = xstrdup(filename); + DEBUGP (("Name: '%s'\n", cur.name)); + + + /* Second column: hh:mm[AP]M, listing does not contain value for + seconds */ + tok = strtok(NULL, ":"); + if (tok == NULL) continue; + hour = atoi(tok); + tok = strtok(NULL, "M"); + if (tok == NULL) continue; + min = atoi(tok); + /* Adjust hour from AM/PM. Just for the record, the sequence goes + 11:00AM, 12:00PM, 01:00PM ... 11:00PM, 12:00AM, 01:00AM . */ + if (tok[0] && tok[1]) tok+=2; + if (hour >= 12 || hour < 0) hour = 0; + if (*tok == 'P') hour += 12; + + DEBUGP (("YYYY/MM/DD HH:MM - %d/%02d/%02d %02d:%02d\n", + year+1900, month, day, hour, min)); + + /* Build the time-stamp (copy & paste from above) */ + timestruct.tm_sec = 0; + timestruct.tm_min = min; + timestruct.tm_hour = hour; + timestruct.tm_mday = day; + timestruct.tm_mon = month; + timestruct.tm_year = year; + timestruct.tm_wday = 0; + timestruct.tm_yday = 0; + timestruct.tm_isdst = -1; + cur.tstamp = mktime (×truct); /* store the time-stamp */ + cur.ptype = TT_HOUR_MIN; + + DEBUGP (("Timestamp: %ld\n", cur.tstamp)); + + /* Third column: Either file length, or <DIR>. We also set the + permissions (guessed as 0644 for plain files and 0755 for + directories as the listing does not give us a clue) and filetype + here. */ + tok = strtok(NULL, " "); + if (tok == NULL) continue; + while ((tok != NULL) && (*tok == '\0')) tok = strtok(NULL, " "); + if (tok == NULL) continue; + if (*tok == '<') + { + cur.type = FT_DIRECTORY; + cur.size = 0; + cur.perms = 0755; + DEBUGP (("Directory\n")); + } + else + { + wgint size; + cur.type = FT_PLAINFILE; + errno = 0; + size = str_to_wgint (tok, NULL, 10); + if (size == WGINT_MAX && errno == ERANGE) + cur.size = 0; /* overflow */ + else + cur.size = size; + cur.perms = 0644; + DEBUGP (("File, size %s bytes\n", number_to_static_string (cur.size))); + } + + cur.linkto = NULL; + + /* And put everything into the linked list */ + if (!dir) + { + l = dir = xnew (struct fileinfo); + memcpy (l, &cur, sizeof (cur)); + l->prev = l->next = NULL; + } + else + { + cur.prev = l; + l->next = xnew (struct fileinfo); + l = l->next; + memcpy (l, &cur, sizeof (cur)); + l->next = NULL; + } + cur.name = NULL; + } + + xfree (cur.name); + xfree (line); + return dir; +} + + + +/* Convert the VMS-style directory listing stored in "file" to a + linked list of fileinfo (system-independent) entries. The contents + of FILE are considered to be produced by the standard VMS + "DIRECTORY [/SIZE [= ALL]] /DATE [/OWNER] [/PROTECTION]" command, + more or less. (Different VMS FTP servers may have different headers, + and may not supply the same data, but all should be subsets of this.) + + VMS normally provides local (server) time and date information. + Define the logical name or environment variable + "WGET_TIMEZONE_DIFFERENTIAL" (seconds) to adjust the receiving local + times if different from the remote local times. + + 2005-02-23 SMS. + Added code to eliminate "^" escape characters from ODS5 extended file + names. The TCPIP FTP server (V5.4) seems to prefer requests which do + not use the escaped names which it provides. +*/ + +#define VMS_DEFAULT_PROT_FILE 0644 +#define VMS_DEFAULT_PROT_DIR 0755 + +/* 2005-02-23 SMS. + eat_carets(). + + Delete ODS5 extended file name escape characters ("^") in the + original buffer. + Note that the current scheme does not handle all EFN cases, but it + could be made more complicated. +*/ + +static void eat_carets( char *str) +/* char *str; Source pointer. */ +{ + char *strd; /* Destination pointer. */ + char hdgt; + unsigned char uchr; + + /* Skip ahead to the first "^", if any. */ + while ((*str != '\0') && (*str != '^')) + str++; + + /* If no caret was found, quit early. */ + if (*str != '\0') + { + /* Shift characters leftward as carets are found. */ + strd = str; + while (*str != '\0') + { + uchr = *str; + if (uchr == '^') + { + /* Found a caret. Skip it, and check the next character. */ + if ((char_prop[(unsigned char) str[1]] & 64) && (char_prop[(unsigned char) str[2]] & 64)) + { + /* Hex digit. Get char code from this and next hex digit. */ + uchr = *(++str); + if (uchr <= '9') + { + hdgt = uchr - '0'; /* '0' - '9' -> 0 - 9. */ + } + else + { + hdgt = ((uchr - 'A') & 7) + 10; /* [Aa] - [Ff] -> 10 - 15. */ + } + hdgt <<= 4; /* X16. */ + uchr = *(++str); /* Next char must be hex digit. */ + if (uchr <= '9') + { + uchr = hdgt + uchr - '0'; + } + else + { + uchr = hdgt + ((uchr - 'A') & 15) + 10; + } + } + else if (uchr == '_') + { + /* Convert escaped "_" to " ". */ + uchr = ' '; + } + else if (uchr == '/') + { + /* Convert escaped "/" (invalid Zip) to "?" (invalid VMS). */ + /* Note that this is a left-over from Info-ZIP code, and is + probably of little value here, except perhaps to avoid + directory confusion which an unconverted slash might cause. + */ + uchr = '?'; + } + /* Else, not a hex digit. Must be a simple escaped character + (or Unicode, which is not yet handled here). + */ + } + /* Else, not a caret. Use as-is. */ + *strd = uchr; + + /* Advance destination and source pointers. */ + strd++; + str++; + } + /* Terminate the destination string. */ + *strd = '\0'; + } +} + + +static struct fileinfo * +ftp_parse_vms_ls (FILE *fp) +{ + int dt, i, j, len; + int perms; + size_t bufsize = 0; + time_t timenow; + struct tm *timestruct; + char date_str[32]; + + char *line = NULL, *tok; /* tokenizer */ + struct fileinfo *dir, *l, cur; /* list creation */ + + dir = l = NULL; + + /* Skip blank lines, Directory heading, and more blank lines. */ + + for (j = 0; (i = getline (&line, &bufsize, fp)) > 0; ) + { + i = clean_line (line, i); + if (i <= 0) + continue; /* Ignore blank line. */ + + if ((j == 0) && (line[i - 1] == ']')) + { + /* Found Directory heading line. Next non-blank line + is significant. */ + j = 1; + } + else if (!strncmp (line, "Total of ", 9)) + { + /* Found "Total of ..." footing line. No valid data + will follow (empty directory). */ + i = 0; /* Arrange for early exit. */ + break; + } + else + { + break; /* Must be significant data. */ + } + } + + /* Read remainder of file until the next blank line or EOF. */ + + cur.name = NULL; + while (i > 0) + { + char *p; + + /* The first token is the file name. After a long name, other + data may be on the following line. A valid directory name ends + in ".DIR;1" (any case), although some VMS FTP servers may omit + the version number (";1"). + */ + + tok = strtok(line, " "); + if (tok == NULL) tok = line; + DEBUGP (("file name: '%s'\n", tok)); + + /* Stripping the version number on a VMS system would be wrong. + It may be foolish on a non-VMS system, too, but that's someone + else's problem. (Define PRESERVE_VMS_VERSIONS for proper + operation on other operating systems.) + + 2005-02-23 SMS. + ODS5 extended file names may contain escaped semi-colons, so + the version number is identified as right-side decimal digits + led by a non-escaped semi-colon. It may be absent. + */ + +#if (!defined( __VMS) && !defined( PRESERVE_VMS_VERSIONS)) + for (p = tok + strlen (tok); (--p > tok) && c_isdigit(*p); ); + if (p > tok && (*p == ';') && (*(p - 1) != '^')) + { + *p = '\0'; + } +#endif /* (!defined( __VMS) && !defined( PRESERVE_VMS_VERSIONS)) */ + + /* 2005-02-23 SMS. + Eliminate "^" escape characters from ODS5 extended file name. + (A caret is invalid in an ODS2 name, so this is always safe.) + */ + eat_carets (tok); + DEBUGP (("file name-^: '%s'\n", tok)); + + /* Differentiate between a directory and any other file. A VMS + listing may not include file protections (permissions). Set a + default permissions value (according to the file type), which + may be overwritten later. Store directory names without the + ".DIR;1" file type and version number, as the plain name is + what will work in a CWD command. + */ + len = strlen (tok); + if (len >= 4 && !c_strncasecmp(tok + (len - 4), ".DIR", 4)) + { + *(tok + (len - 4)) = '\0'; /* Discard ".DIR". */ + cur.type = FT_DIRECTORY; + cur.perms = VMS_DEFAULT_PROT_DIR; + DEBUGP (("Directory (nv)\n")); + } + else if (len >= 6 && !c_strncasecmp (tok + len - 6, ".DIR;1", 6)) + { + *(tok + (len - 6)) = '\0'; /* Discard ".DIR;1". */ + cur.type = FT_DIRECTORY; + cur.perms = VMS_DEFAULT_PROT_DIR; + DEBUGP (("Directory (v)\n")); + } + else + { + cur.type = FT_PLAINFILE; + cur.perms = VMS_DEFAULT_PROT_FILE; + DEBUGP (("File\n")); + } + xfree (cur.name); + cur.name = xstrdup (tok); + DEBUGP (("Name: '%s'\n", cur.name)); + + /* Null the date and time string. */ + *date_str = '\0'; + + /* VMS lacks symbolic links. */ + cur.linkto = NULL; + + /* VMS reports file sizes in (512-byte) disk blocks, not bytes, + hence useless for an integrity check based on byte-count. + Set size to unknown. + */ + cur.size = 0; + + /* Get token 2, if any. A long name may force all other data onto + a second line. If needed, read the second line. + */ + + tok = strtok (NULL, " "); + if (tok == NULL) + { + DEBUGP (("Getting additional line.\n")); + i = getline (&line, &bufsize, fp); + if (i <= 0) + { + DEBUGP (("EOF. Leaving listing parser.\n")); + break; + } + + /* Second line must begin with " ". Otherwise, it's a first + line (and we may be confused). + */ + i = clean_line (line, i); + if (i <= 0) + { + /* Blank line. End of significant file listing. */ + DEBUGP (("Blank line. Leaving listing parser.\n")); + break; + } + else if (line[0] != ' ') + { + DEBUGP (("Non-blank in column 1. Must be a new file name?\n")); + continue; + } + else + { + tok = strtok (line, " "); + if (tok == NULL) + { + /* Unexpected non-empty but apparently blank line. */ + DEBUGP (("Null token. Leaving listing parser.\n")); + break; + } + } + } + + /* Analyze tokens. (Order is not significant, except date must + precede time.) + + Size: ddd or ddd/ddd (where "ddd" is a decimal number) + Date: DD-MMM-YYYY + Time: HH:MM or HH:MM:SS or HH:MM:SS.CC + Owner: [user] or [user,group] + Protection: (ppp,ppp,ppp,ppp) (where "ppp" is "RWED" or some + subset thereof, for System, Owner, Group, World. + + If permission is lacking, info may be replaced by the string: + "No privilege for attempted operation". + */ + while (tok != NULL) + { + DEBUGP (("Token: >%s<: ", tok)); + + if ((strlen (tok) < 12) && (strchr( tok, '-') != NULL)) + { + /* Date. */ + DEBUGP (("Date.\n")); + snprintf(date_str, sizeof(date_str), "%s ", tok); + } + else if ((strlen (tok) < 12) && (strchr( tok, ':') != NULL)) + { + /* Time. */ + DEBUGP (("Time. ")); + strncat( date_str, + tok, + (sizeof( date_str)- strlen (date_str) - 1)); + DEBUGP (("Date time: >%s<\n", date_str)); + } + else if (strchr (tok, '[') != NULL) + { + /* Owner. (Ignore.) */ + DEBUGP (("Owner.\n")); + } + else if (strchr (tok, '(') != NULL) + { + /* Protections (permissions). */ + perms = 0; + j = 0; + /*FIXME: Should not be using the variable like this. */ + for (i = 0; i < (int) strlen(tok); i++) + { + switch (tok[ i]) + { + case '(': + break; + case ')': + break; + case ',': + if (j == 0) + { + perms = 0; + } + else if (j < 4) + { + perms <<= 3; + } + j++; + break; + case 'R': + perms |= 4; + break; + case 'W': + perms |= 2; + break; + case 'E': + perms |= 1; + break; + case 'D': + perms |= 2; + break; + } + } + cur.perms = perms; + DEBUGP (("Prot. perms = %0o.\n", (unsigned) cur.perms)); + } + else + { + /* Nondescript. Probably size(s), probably in blocks. + Could be "No privilege ..." message. (Ignore.) + */ + DEBUGP (("Ignored (size?).\n")); + } + + tok = strtok (NULL, " "); + } + + /* Tokens exhausted. Interpret the data, and fill in the + structure. + */ + /* Fill tm timestruct according to date-time string. Fractional + seconds are ignored. Default to current time, if conversion + fails. + */ + timenow = time( NULL); + timestruct = localtime( &timenow ); + strptime( date_str, "%d-%b-%Y %H:%M:%S", timestruct); + + /* Convert struct tm local time to time_t local time. */ + timenow = mktime (timestruct); + /* Offset local time according to environment variable (seconds). */ + if ((tok = getenv ( "WGET_TIMEZONE_DIFFERENTIAL")) != NULL) + { + dt = atoi (tok); + DEBUGP (("Time differential = %d.\n", dt)); + } + else + dt = 0; + + if (dt >= 0) + timenow += dt; + else + timenow -= (-dt); + + cur.tstamp = timenow; /* Store the time-stamp. */ + DEBUGP (("Timestamp: %ld\n", cur.tstamp)); + cur.ptype = TT_HOUR_MIN; + + /* Add the data for this item to the linked list, */ + if (!dir) + { + l = dir = (struct fileinfo *)xmalloc (sizeof (struct fileinfo)); + cur.prev = cur.next = NULL; + memcpy (l, &cur, sizeof (cur)); + } + else + { + cur.prev = l; + cur.next = NULL; + l->next = (struct fileinfo *)xmalloc (sizeof (struct fileinfo)); + l = l->next; + memcpy (l, &cur, sizeof (cur)); + } + cur.name = NULL; + + i = getline (&line, &bufsize, fp); + if (i > 0) + { + i = clean_line (line, i); + if (i <= 0) + { + /* Blank line. End of significant file listing. */ + break; + } + } + } + + xfree (cur.name); + xfree (line); + return dir; +} + + +/* This function switches between the correct parsing routine depending on + the SYSTEM_TYPE. The system type should be based on the result of the + "SYST" response of the FTP server. According to this response we will + use on of the three different listing parsers that cover the most of FTP + servers used nowadays. */ + +struct fileinfo * +ftp_parse_ls (const char *file, const enum stype system_type) +{ + FILE *fp; + struct fileinfo *fi; + + fp = fopen (file, "rb"); + if (!fp) + { + logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno)); + return NULL; + } + + fi = ftp_parse_ls_fp (fp, system_type); + fclose(fp); + + return fi; +} + +struct fileinfo * +ftp_parse_ls_fp (FILE *fp, const enum stype system_type) +{ + switch (system_type) + { + case ST_UNIX: + return ftp_parse_unix_ls (fp, 0); + case ST_WINNT: + { + /* Detect whether the listing is simulating the UNIX format */ + int c = fgetc(fp); + rewind(fp); + + /* If the first character of the file is '0'-'9', it's WINNT + format. */ + if (c >= '0' && c <='9') + return ftp_parse_winnt_ls (fp); + else + return ftp_parse_unix_ls (fp, 1); + } + case ST_VMS: + return ftp_parse_vms_ls (fp); + case ST_MACOS: + return ftp_parse_unix_ls (fp, 1); + default: + logprintf (LOG_NOTQUIET, _("\ +Unsupported listing type, trying Unix listing parser.\n")); + return ftp_parse_unix_ls (fp, 0); + } +} + +/* Stuff for creating FTP index. */ + +/* The function creates an HTML index containing references to given + directories and files on the appropriate host. The references are + FTP. */ +uerr_t +ftp_index (const char *file, struct url *u, struct fileinfo *f) +{ + FILE *fp; + char *upwd; + char *htcldir; /* HTML-clean dir name */ + char *htclfile; /* HTML-clean file name */ + char *urlclfile; /* URL-clean file name */ + + if (!output_stream) + { + fp = fopen (file, "wb"); + if (!fp) + { + logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno)); + return FOPENERR; + } + } + else + fp = output_stream; + if (u->user) + { + char *tmpu, *tmpp; /* temporary, clean user and passwd */ + + tmpu = url_escape (u->user); + tmpp = u->passwd ? url_escape (u->passwd) : NULL; + if (tmpp) + upwd = concat_strings (tmpu, ":", tmpp, "@", (char *) 0); + else + upwd = concat_strings (tmpu, "@", (char *) 0); + xfree (tmpu); + xfree (tmpp); + } + else + upwd = xstrdup (""); + + htcldir = html_quote_string (u->dir); + + fprintf (fp, "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"); + fprintf (fp, "<html>\n<head>\n<title>"); + fprintf (fp, _("Index of /%s on %s:%d"), htcldir, u->host, u->port); + fprintf (fp, "</title>\n</head>\n<body>\n<h1>"); + fprintf (fp, _("Index of /%s on %s:%d"), htcldir, u->host, u->port); + fprintf (fp, "</h1>\n<hr>\n<pre>\n"); + + while (f) + { + fprintf (fp, " "); + if (f->tstamp != -1) + { + /* #### Should we translate the months? Or, even better, use + ISO 8601 dates? */ + static const char *months[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }; + time_t tstamp = f->tstamp; + struct tm *ptm = localtime (&tstamp); + + fprintf (fp, "%d %s %02d ", ptm->tm_year + 1900, months[ptm->tm_mon], + ptm->tm_mday); + if (f->ptype == TT_HOUR_MIN) + fprintf (fp, "%02d:%02d ", ptm->tm_hour, ptm->tm_min); + else + fprintf (fp, " "); + } + else + fprintf (fp, _("time unknown ")); + switch (f->type) + { + case FT_PLAINFILE: + fprintf (fp, _("File ")); + break; + case FT_DIRECTORY: + fprintf (fp, _("Directory ")); + break; + case FT_SYMLINK: + fprintf (fp, _("Link ")); + break; + default: + fprintf (fp, _("Not sure ")); + break; + } + htclfile = html_quote_string (f->name); + urlclfile = url_escape_unsafe_and_reserved (f->name); + fprintf (fp, "<a href=\"ftp://%s%s:%d", upwd, u->host, u->port); + if (*u->dir != '/') + putc ('/', fp); + /* XXX: Should probably URL-escape dir components here, rather + * than just HTML-escape, for consistency with the next bit where + * we use urlclfile for the file component. Anyway, this is safer + * than what we had... */ + fprintf (fp, "%s", htcldir); + if (*u->dir) + putc ('/', fp); + fprintf (fp, "%s", urlclfile); + if (f->type == FT_DIRECTORY) + putc ('/', fp); + fprintf (fp, "\">%s", htclfile); + if (f->type == FT_DIRECTORY) + putc ('/', fp); + fprintf (fp, "</a> "); + if (f->type == FT_PLAINFILE) + fprintf (fp, _(" (%s bytes)"), number_to_static_string (f->size)); + else if (f->type == FT_SYMLINK) + fprintf (fp, "-> %s", f->linkto ? f->linkto : "(nil)"); + putc ('\n', fp); + xfree (htclfile); + xfree (urlclfile); + f = f->next; + } + fprintf (fp, "</pre>\n</body>\n</html>\n"); + xfree (htcldir); + xfree (upwd); + if (!output_stream) + fclose (fp); + else + fflush (fp); + return FTPOK; +} |