/* 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 (const char *file, int ignore_perms)
{
FILE *fp;
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 */
fp = fopen (file, "rb");
if (!fp)
{
logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
return NULL;
}
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 (!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; ", cur.perms));
}
else
{
cur.perms = symperms (tok + 1);
DEBUGP (("perms %0o; ", 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 (!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. */
for (; c_isdigit (*tok); tok++)
year = (*tok - '0') + 10 * year;
if (*tok == ':')
{
/* This means these were hours! */
hour = year;
year = 0;
ptype = TT_HOUR_MIN;
++tok;
/* Get the minutes... */
for (; c_isdigit (*tok); tok++)
min = (*tok - '0') + 10 * min;
if (*tok == ':')
{
/* ...and the seconds. */
++tok;
for (; c_isdigit (*tok); tok++)
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_null (cur.name);
xfree_null (cur.linkto);
continue;
}
if (!dir)
{
l = dir = xnew (struct fileinfo);
memcpy (l, &cur, sizeof (cur));
l->prev = l->next = NULL;
}
else
{
/* 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 (const char *file)
{
FILE *fp;
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;
struct tm timestruct, *tnow;
time_t timenow;
char *line, *tok; /* tokenizer */
struct fileinfo *dir, *l, cur; /* list creation */
fp = fopen (file, "rb");
if (!fp)
{
logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
return NULL;
}
dir = l = NULL;
/* Line loop to end of file: */
while ((line = read_whole_line (fp)))
{
DEBUGP (("%s\n", line));
len = strlen (line);
/* Destroy <CR> if there is one. */
if (len && line[len - 1] == '\r')
line[--len] = '\0';
/* Skip if total... */
if (!strncasecmp (line, "total", 5))
{
free (line);
continue;
}
/* Get the first token (permissions). */
tok = strtok (line, " ");
if (!tok)
{
free (line);
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 (("UNKOWN; "));
break;
}
cur.perms = symperms (tok + 1);
DEBUGP (("perms %0o; ", cur.perms));
error = ignore = 0; /* Errnoeous and ignoring entries are
treated equally for now. */
year = hour = min = sec = 0; /* Silence the compiler. */
month = day = 0;
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. */
while ((tok = strtok (NULL, " ")))
{
--next;
if (next < 0) /* a month name was not encountered */
{
for (i = 0; i < 12; i++)
if (!strcmp (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)
{
char *t = tok - 2;
long mul = 1;
for (cur.size = 0; t > line && ISDIGIT (*t); mul *= 10, t--)
cur.size += mul * (*t - '0');
if (t == line)
{
/* Something is seriously wrong. */
error = 1;
break;
}
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 (ISDIGIT (*tok))
{
/* Suppose it's year. */
for (; ISDIGIT (*tok); tok++)
year = (*tok - '0') + 10 * year;
if (*tok == ':')
{
/* This means these were hours! */
hour = year;
year = 0;
++tok;
/* Get the minutes... */
for (; ISDIGIT (*tok); tok++)
min = (*tok - '0') + 10 * min;
if (*tok == ':')
{
/* ...and the seconds. */
++tok;
for (; ISDIGIT (*tok); tok++)
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 = (char *)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 (("\n"));
if (error || ignore)
{
DEBUGP (("Skipping.\n"));
FREE_MAYBE (cur.name);
FREE_MAYBE (cur.linkto);
free (line);
continue;
}
if (!dir)
{
l = dir = (struct fileinfo *)xmalloc (sizeof (struct fileinfo));
memcpy (l, &cur, sizeof (cur));
l->prev = l->next = NULL;
}
else
{
cur.prev = l;
l->next = (struct fileinfo *)xmalloc (sizeof (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 [email protected]). */
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 */
free (line);
}
fclose (fp);
return dir;
}
