X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Fxheader.c;h=361f684751806c5482d44f9c1fa1ed1f397c6ac7;hb=ec94fbdf458adb2af803eefdd1a9c9bbb432bb21;hp=50fd3e754dbd8bca19964d7eecf5be6c3dc2aa7c;hpb=545e4cd69d15fda9b485e3585d8de3c1511c16c8;p=chaz%2Ftar
diff --git a/src/xheader.c b/src/xheader.c
index 50fd3e7..361f684 100644
--- a/src/xheader.c
+++ b/src/xheader.c
@@ -1,21 +1,22 @@
/* POSIX extended headers for tar.
- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2012
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2007, 2009-2010, 2012-2014 Free Software
+ Foundation, Inc.
- This program 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, or (at your option) any later
- version.
+ This file is part of GNU tar.
- This program 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.
+ GNU tar 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.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ GNU tar 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 this program. If not, see . */
#include
@@ -167,14 +168,13 @@ xheader_set_single_keyword (char *kw)
static void
assign_time_option (char **sval, time_t *tval, const char *input)
{
- uintmax_t u;
char *p;
- time_t t = u = strtoumax (input, &p, 10);
- if (t != u || *p || errno == ERANGE)
+ struct timespec t = decode_timespec (input, &p, false);
+ if (! valid_timespec (t) || *p)
ERROR ((0, 0, _("Time stamp is out of allowed range")));
else
{
- *tval = t;
+ *tval = t.tv_sec;
assign_string (sval, input);
}
}
@@ -262,7 +262,7 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, size_t n)
char *dir = NULL;
char *base = NULL;
char pidbuf[UINTMAX_STRSIZE_BOUND];
- char const *pptr;
+ char const *pptr = NULL;
char nbuf[UINTMAX_STRSIZE_BOUND];
char const *nptr = NULL;
@@ -335,13 +335,10 @@ xheader_format_name (struct tar_stat_info *st, const char *fmt, size_t n)
break;
case 'n':
- if (nptr)
- {
- q = stpcpy (q, nptr);
- p += 2;
- break;
- }
- /* else fall through */
+ q = stpcpy (q, nptr);
+ p += 2;
+ break;
+
default:
*q++ = *p++;
@@ -455,7 +452,8 @@ xheader_write_global (struct xheader *xhdr)
char *name;
xheader_finish (xhdr);
- xheader_write (XGLTYPE, name = xheader_ghdr_name (), time (NULL), xhdr);
+ name = xheader_ghdr_name ();
+ xheader_write (XGLTYPE, name, start_time.tv_sec, xhdr);
free (name);
}
}
@@ -655,7 +653,6 @@ decode_record (struct xheader *xhdr,
{
char *start = *ptr;
char *p = start;
- uintmax_t u;
size_t len;
char *len_lim;
char const *keyword;
@@ -672,13 +669,7 @@ decode_record (struct xheader *xhdr,
return false;
}
- errno = 0;
- len = u = strtoumax (p, &len_lim, 10);
- if (len != u || errno == ERANGE)
- {
- ERROR ((0, 0, _("Extended header length is out of allowed range")));
- return false;
- }
+ len = strtoumax (p, &len_lim, 10);
if (len_max < len)
{
@@ -764,6 +755,16 @@ xheader_decode (struct tar_stat_info *st)
continue;
}
run_override_list (keyword_override_list, st);
+
+ /* The archived (effective) file size is always set directly in tar header
+ field, possibly overridden by "size" extended header - in both cases,
+ result is now decoded in st->stat.st_size */
+ st->archive_file_size = st->stat.st_size;
+
+ /* The real file size (given by stat()) may be redefined for sparse
+ files in "GNU.sparse.realsize" extended header */
+ if (st->real_size_set)
+ st->stat.st_size = st->real_size;
}
static void
@@ -820,10 +821,16 @@ xheader_store (char const *keyword, struct tar_stat_info *st,
}
void
-xheader_read (struct xheader *xhdr, union block *p, size_t size)
+xheader_read (struct xheader *xhdr, union block *p, off_t size)
{
size_t j = 0;
+ if (size < 0)
+ size = 0; /* Already diagnosed. */
+
+ if (SIZE_MAX - BLOCKSIZE <= size)
+ xalloc_die ();
+
size += BLOCKSIZE;
xhdr->size = size;
xhdr->buffer = xmalloc (size + 1);
@@ -1034,14 +1041,12 @@ xheader_string_end (struct xheader *xhdr, char const *keyword)
static void
out_of_range_header (char const *keyword, char const *value,
- uintmax_t minus_minval, uintmax_t maxval)
+ intmax_t minval, uintmax_t maxval)
{
- char minval_buf[UINTMAX_STRSIZE_BOUND + 1];
+ char minval_buf[INT_BUFSIZE_BOUND (intmax_t)];
char maxval_buf[UINTMAX_STRSIZE_BOUND];
- char *minval_string = umaxtostr (minus_minval, minval_buf + 1);
+ char *minval_string = imaxtostr (minval, minval_buf);
char *maxval_string = umaxtostr (maxval, maxval_buf);
- if (minus_minval)
- *--minval_string = '-';
/* TRANSLATORS: The first %s is the pax extended header keyword
(atime, gid, etc.). */
@@ -1084,134 +1089,59 @@ code_time (struct timespec t, char const *keyword, struct xheader *xhdr)
xheader_print (xhdr, keyword, code_timespec (t, buf));
}
-enum decode_time_status
- {
- decode_time_success,
- decode_time_range,
- decode_time_bad_header
- };
-
-static enum decode_time_status
-_decode_time (struct timespec *ts, char const *arg, char const *keyword)
+static bool
+decode_time (struct timespec *ts, char const *arg, char const *keyword)
{
- time_t s;
- unsigned long int ns = 0;
- char *p;
char *arg_lim;
- bool negative = *arg == '-';
-
- errno = 0;
+ struct timespec t = decode_timespec (arg, &arg_lim, true);
- if (ISDIGIT (arg[negative]))
+ if (! valid_timespec (t))
{
- if (negative)
- {
- intmax_t i = strtoimax (arg, &arg_lim, 10);
- if (TYPE_SIGNED (time_t) ? i < TYPE_MINIMUM (time_t) : i < 0)
- return decode_time_range;
- s = i;
- }
+ if (arg < arg_lim && !*arg_lim)
+ out_of_range_header (keyword, arg, TYPE_MINIMUM (time_t),
+ TYPE_MAXIMUM (time_t));
else
- {
- uintmax_t i = strtoumax (arg, &arg_lim, 10);
- if (TYPE_MAXIMUM (time_t) < i)
- return decode_time_range;
- s = i;
- }
-
- p = arg_lim;
-
- if (errno == ERANGE)
- return decode_time_range;
-
- if (*p == '.')
- {
- int digits = 0;
- bool trailing_nonzero = false;
-
- while (ISDIGIT (*++p))
- if (digits < LOG10_BILLION)
- {
- ns = 10 * ns + (*p - '0');
- digits++;
- }
- else
- trailing_nonzero |= *p != '0';
-
- while (digits++ < LOG10_BILLION)
- ns *= 10;
-
- if (negative)
- {
- /* Convert "-1.10000000000001" to s == -2, ns == 89999999.
- I.e., truncate time stamps towards minus infinity while
- converting them to internal form. */
- ns += trailing_nonzero;
- if (ns != 0)
- {
- if (s == TYPE_MINIMUM (time_t))
- return decode_time_range;
- s--;
- ns = BILLION - ns;
- }
- }
- }
-
- if (! *p)
- {
- ts->tv_sec = s;
- ts->tv_nsec = ns;
- return decode_time_success;
- }
+ ERROR ((0, 0, _("Malformed extended header: invalid %s=%s"),
+ keyword, arg));
+ return false;
}
- return decode_time_bad_header;
+ *ts = t;
+ return true;
}
-static bool
-decode_time (struct timespec *ts, char const *arg, char const *keyword)
+static void
+code_signed_num (uintmax_t value, char const *keyword,
+ intmax_t minval, uintmax_t maxval, struct xheader *xhdr)
{
- switch (_decode_time (ts, arg, keyword))
- {
- case decode_time_success:
- return true;
- case decode_time_bad_header:
- ERROR ((0, 0, _("Malformed extended header: invalid %s=%s"),
- keyword, arg));
- return false;
- case decode_time_range:
- out_of_range_header (keyword, arg, - (uintmax_t) TYPE_MINIMUM (time_t),
- TYPE_MAXIMUM (time_t));
- return false;
- }
- return true;
+ char sbuf[SYSINT_BUFSIZE];
+ xheader_print (xhdr, keyword, sysinttostr (value, minval, maxval, sbuf));
}
static void
code_num (uintmax_t value, char const *keyword, struct xheader *xhdr)
{
- char sbuf[UINTMAX_STRSIZE_BOUND];
- xheader_print (xhdr, keyword, umaxtostr (value, sbuf));
+ code_signed_num (value, keyword, 0, UINTMAX_MAX, xhdr);
}
static bool
-decode_num (uintmax_t *num, char const *arg, uintmax_t maxval,
- char const *keyword)
+decode_signed_num (intmax_t *num, char const *arg,
+ intmax_t minval, uintmax_t maxval,
+ char const *keyword)
{
- uintmax_t u;
char *arg_lim;
+ intmax_t u = strtosysint (arg, &arg_lim, minval, maxval);
- if (! (ISDIGIT (*arg)
- && (errno = 0, u = strtoumax (arg, &arg_lim, 10), !*arg_lim)))
+ if (errno == EINVAL || *arg_lim)
{
ERROR ((0, 0, _("Malformed extended header: invalid %s=%s"),
keyword, arg));
return false;
}
- if (! (u <= maxval && errno != ERANGE))
+ if (errno == ERANGE)
{
- out_of_range_header (keyword, arg, 0, maxval);
+ out_of_range_header (keyword, arg, minval, maxval);
return false;
}
@@ -1219,6 +1149,17 @@ decode_num (uintmax_t *num, char const *arg, uintmax_t maxval,
return true;
}
+static bool
+decode_num (uintmax_t *num, char const *arg, uintmax_t maxval,
+ char const *keyword)
+{
+ intmax_t i;
+ if (! decode_signed_num (&i, arg, 0, maxval, keyword))
+ return false;
+ *num = i;
+ return true;
+}
+
static void
dummy_coder (struct tar_stat_info const *st __attribute__ ((unused)),
char const *keyword __attribute__ ((unused)),
@@ -1257,7 +1198,8 @@ static void
gid_coder (struct tar_stat_info const *st, char const *keyword,
struct xheader *xhdr, void const *data __attribute__ ((unused)))
{
- code_num (st->stat.st_gid, keyword, xhdr);
+ code_signed_num (st->stat.st_gid, keyword,
+ TYPE_MINIMUM (gid_t), TYPE_MAXIMUM (gid_t), xhdr);
}
static void
@@ -1266,8 +1208,9 @@ gid_decoder (struct tar_stat_info *st,
char const *arg,
size_t size __attribute__((unused)))
{
- uintmax_t u;
- if (decode_num (&u, arg, TYPE_MAXIMUM (gid_t), keyword))
+ intmax_t u;
+ if (decode_signed_num (&u, arg, TYPE_MINIMUM (gid_t),
+ TYPE_MAXIMUM (gid_t), keyword))
st->stat.st_gid = u;
}
@@ -1380,7 +1323,8 @@ static void
uid_coder (struct tar_stat_info const *st, char const *keyword,
struct xheader *xhdr, void const *data __attribute__ ((unused)))
{
- code_num (st->stat.st_uid, keyword, xhdr);
+ code_signed_num (st->stat.st_uid, keyword,
+ TYPE_MINIMUM (uid_t), TYPE_MAXIMUM (uid_t), xhdr);
}
static void
@@ -1389,8 +1333,9 @@ uid_decoder (struct tar_stat_info *st,
char const *arg,
size_t size __attribute__((unused)))
{
- uintmax_t u;
- if (decode_num (&u, arg, TYPE_MAXIMUM (uid_t), keyword))
+ intmax_t u;
+ if (decode_signed_num (&u, arg, TYPE_MINIMUM (uid_t),
+ TYPE_MAXIMUM (uid_t), keyword))
st->stat.st_uid = u;
}
@@ -1425,7 +1370,10 @@ sparse_size_decoder (struct tar_stat_info *st,
{
uintmax_t u;
if (decode_num (&u, arg, TYPE_MAXIMUM (off_t), keyword))
- st->stat.st_size = u;
+ {
+ st->real_size_set = 1;
+ st->real_size = u;
+ }
}
static void
@@ -1512,7 +1460,7 @@ sparse_map_decoder (struct tar_stat_info *st,
st->sparse_map_avail = 0;
while (1)
{
- uintmax_t u;
+ intmax_t u;
char *delim;
struct sp_array e;
@@ -1524,11 +1472,16 @@ sparse_map_decoder (struct tar_stat_info *st,
}
errno = 0;
- u = strtoumax (arg, &delim, 10);
+ u = strtoimax (arg, &delim, 10);
+ if (TYPE_MAXIMUM (off_t) < u)
+ {
+ u = TYPE_MAXIMUM (off_t);
+ errno = ERANGE;
+ }
if (offset)
{
e.offset = u;
- if (!(u == e.offset && errno != ERANGE))
+ if (errno == ERANGE)
{
out_of_range_header (keyword, arg, 0, TYPE_MAXIMUM (off_t));
return;
@@ -1537,7 +1490,7 @@ sparse_map_decoder (struct tar_stat_info *st,
else
{
e.numbytes = u;
- if (!(u == e.numbytes && errno != ERANGE))
+ if (errno == ERANGE)
{
out_of_range_header (keyword, arg, 0, TYPE_MAXIMUM (off_t));
return;