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.,
- 59 Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "system.h"
};
#endif
+#include <quotearg.h>
+
#include "common.h"
#ifndef MSDOS
struct link *next;
dev_t dev;
ino_t ino;
- short linkcount;
char name[1];
};
-struct link *linklist = NULL; /* points to first link in list */
+static struct link *linklist; /* points to first link in list */
\f
+/* The maximum uintmax_t value that can be represented with DIGITS digits,
+ assuming that each digit is BITS_PER_DIGIT wide. */
+#define MAX_VAL_WITH_DIGITS(digits, bits_per_digit) \
+ ((digits) * (bits_per_digit) < sizeof (uintmax_t) * CHAR_BIT \
+ ? ((uintmax_t) 1 << ((digits) * (bits_per_digit))) - 1 \
+ : (uintmax_t) -1)
-/*------------------------------------------------------------------------.
-| Convert VALUE into a size-SIZE field at WHERE, including a |
-| trailing space. For example, 3 for SIZE means two digits and a space. |
-| |
-| We assume the trailing NUL is already there and don't fill it in. This |
-| fact is used by start_header and finish_header, so don't change it! |
-`------------------------------------------------------------------------*/
-
-/* This should be equivalent to: sprintf (WHERE, "%*lo ", SIZE - 1, VALUE);
- except that we don't assume VALUE fits in an unsigned long, and
- except that sprintf fills in the trailing NUL and we don't. */
+/* Convert VALUE to an octal representation suitable for tar headers.
+ Output to buffer WHERE with size SIZE.
+ The result is undefined if SIZE is 0 or if VALUE is too large to fit. */
static void
-to_oct (uintmax_t value, char *where, size_t size, const char *type)
+to_octal (uintmax_t value, char *where, size_t size)
{
uintmax_t v = value;
size_t i = size;
- where[--i] = ' '; /* put in the space, though */
- /* Produce the digits -- at least one. */
+ do
+ {
+ where[--i] = '0' + (v & ((1 << LG_8) - 1));
+ v >>= LG_8;
+ }
+ while (i);
+}
+
+/* Convert NEGATIVE VALUE to a base-256 representation suitable for
+ tar headers. NEGATIVE is 1 if VALUE was negative before being cast
+ to uintmax_t, 0 otherwise. Output to buffer WHERE with size SIZE.
+ The result is undefined if SIZE is 0 or if VALUE is too large to
+ fit. */
+
+static void
+to_base256 (int negative, uintmax_t value, char *where, size_t size)
+{
+ uintmax_t v = value;
+ uintmax_t propagated_sign_bits =
+ ((uintmax_t) - negative << (CHAR_BIT * sizeof v - LG_256));
+ size_t i = size;
do
{
- where[--i] = '0' + (int) (v & 7); /* one octal digit */
- v >>= 3;
+ where[--i] = v & ((1 << LG_256) - 1);
+ v = propagated_sign_bits | (v >> LG_256);
+ }
+ while (i);
+}
+
+/* Convert NEGATIVE VALUE (which was originally of size VALSIZE) to
+ external form, using SUBSTITUTE (...) if VALUE won't fit. Output
+ to buffer WHERE with size SIZE. NEGATIVE is 1 iff VALUE was
+ negative before being cast to uintmax_t; its original bitpattern
+ can be deduced from VALSIZE, its original size before casting.
+ TYPE is the kind of value being output (useful for diagnostics).
+ Prefer the POSIX format of SIZE - 1 octal digits (with leading zero
+ digits), followed by '\0'. If this won't work, and if GNU or
+ OLDGNU format is allowed, use '\200' followed by base-256, or (if
+ NEGATIVE is nonzero) '\377' followed by two's complement base-256.
+ If neither format works, use SUBSTITUTE (...) instead. Pass to
+ SUBSTITUTE the address of an 0-or-1 flag recording whether the
+ substitute value is negative. */
+
+static void
+to_chars (int negative, uintmax_t value, size_t valsize,
+ uintmax_t (*substitute) PARAMS ((int *)),
+ char *where, size_t size, const char *type)
+{
+ int base256_allowed = (archive_format == GNU_FORMAT
+ || archive_format == OLDGNU_FORMAT);
+
+ /* Generate the POSIX octal representation if the number fits. */
+ if (! negative && value <= MAX_VAL_WITH_DIGITS (size - 1, LG_8))
+ {
+ where[size - 1] = '\0';
+ to_octal (value, where, size - 1);
+ }
+
+ /* Otherwise, generate the base-256 representation if we are
+ generating an old or new GNU format and if the number fits. */
+ else if (((negative ? -1 - value : value)
+ <= MAX_VAL_WITH_DIGITS (size - 1, LG_256))
+ && base256_allowed)
+ {
+ where[0] = negative ? -1 : 1 << (LG_256 - 1);
+ to_base256 (negative, value, where + 1, size - 1);
}
- while (i != 0 && v != 0);
- /* Leading spaces, if necessary. */
- while (i != 0)
- where[--i] = ' ';
+ /* Otherwise, if the number is negative, and if it would not cause
+ ambiguity on this host by confusing positive with negative
+ values, then generate the POSIX octal representation of the value
+ modulo 2**(field bits). The resulting tar file is
+ machine-dependent, since it depends on the host word size. Yuck!
+ But this is the traditional behavior. */
+ else if (negative && valsize * CHAR_BIT <= (size - 1) * LG_8)
+ {
+ static int warned_once;
+ if (! warned_once)
+ {
+ warned_once = 1;
+ WARN ((0, 0, _("Generating negative octal headers")));
+ }
+ where[size - 1] = '\0';
+ to_octal (value & MAX_VAL_WITH_DIGITS (valsize * CHAR_BIT, 1),
+ where, size - 1);
+ }
- if (v != 0)
+ /* Otherwise, output a substitute value if possible (with a
+ warning), and an error message if not. */
+ else
{
- char buf[UINTMAX_STRSIZE_BOUND];
- ERROR ((0, 0, _("%s value %s is too large to fit in a %u-bit field"),
- type, STRINGIFY_BIGINT (value, buf),
- (unsigned) ((size - 1) * 3)));
+ uintmax_t maxval = (base256_allowed
+ ? MAX_VAL_WITH_DIGITS (size - 1, LG_256)
+ : MAX_VAL_WITH_DIGITS (size - 1, LG_8));
+ char valbuf[UINTMAX_STRSIZE_BOUND + 1];
+ char maxbuf[UINTMAX_STRSIZE_BOUND];
+ char minbuf[UINTMAX_STRSIZE_BOUND + 1];
+ char const *minval_string;
+ char const *maxval_string = STRINGIFY_BIGINT (maxval, maxbuf);
+ char const *value_string;
+
+ if (base256_allowed)
+ {
+ uintmax_t m = maxval + 1 ? maxval + 1 : maxval / 2 + 1;
+ char *p = STRINGIFY_BIGINT (m, minbuf + 1);
+ *--p = '-';
+ minval_string = p;
+ }
+ else
+ minval_string = "0";
+
+ if (negative)
+ {
+ char *p = STRINGIFY_BIGINT (- value, valbuf + 1);
+ *--p = '-';
+ value_string = p;
+ }
+ else
+ value_string = STRINGIFY_BIGINT (value, valbuf);
+
+ if (substitute)
+ {
+ int negsub;
+ uintmax_t sub = substitute (&negsub) & maxval;
+ uintmax_t s = (negsub &= archive_format == GNU_FORMAT) ? - sub : sub;
+ char subbuf[UINTMAX_STRSIZE_BOUND + 1];
+ char *sub_string = STRINGIFY_BIGINT (s, subbuf + 1);
+ if (negsub)
+ *--sub_string = '-';
+ WARN ((0, 0, _("value %s out of %s range %s..%s; substituting %s"),
+ value_string, type, minval_string, maxval_string,
+ sub_string));
+ to_chars (negsub, s, valsize, 0, where, size, type);
+ }
+ else
+ ERROR ((0, 0, _("value %s out of %s range %s..%s"),
+ value_string, type, minval_string, maxval_string));
}
}
+
+static uintmax_t
+gid_substitute (int *negative)
+{
+ gid_t r;
+#ifdef GID_NOBODY
+ r = GID_NOBODY;
+#else
+ static gid_t gid_nobody;
+ if (!gid_nobody && !gname_to_gid ("nobody", &gid_nobody))
+ gid_nobody = -2;
+ r = gid_nobody;
+#endif
+ *negative = r < 0;
+ return r;
+}
+
void
-gid_to_oct (gid_t v, char *p, size_t s)
+gid_to_chars (gid_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "gid_t");
+ to_chars (v < 0, (uintmax_t) v, sizeof v, gid_substitute, p, s, "gid_t");
}
+
void
-major_to_oct (major_t v, char *p, size_t s)
+major_to_chars (major_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "major_t");
+ to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "major_t");
}
+
void
-minor_to_oct (minor_t v, char *p, size_t s)
+minor_to_chars (minor_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "minor_t");
+ to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "minor_t");
}
+
void
-mode_to_oct (mode_t v, char *p, size_t s)
+mode_to_chars (mode_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "mode_t");
+ /* In the common case where the internal and external mode bits are the same,
+ and we are not using POSIX or GNU format,
+ propagate all unknown bits to the external mode.
+ This matches historical practice.
+ Otherwise, just copy the bits we know about. */
+ int negative;
+ uintmax_t u;
+ if (S_ISUID == TSUID && S_ISGID == TSGID && S_ISVTX == TSVTX
+ && S_IRUSR == TUREAD && S_IWUSR == TUWRITE && S_IXUSR == TUEXEC
+ && S_IRGRP == TGREAD && S_IWGRP == TGWRITE && S_IXGRP == TGEXEC
+ && S_IROTH == TOREAD && S_IWOTH == TOWRITE && S_IXOTH == TOEXEC
+ && archive_format != POSIX_FORMAT
+ && archive_format != GNU_FORMAT)
+ {
+ negative = v < 0;
+ u = v;
+ }
+ else
+ {
+ negative = 0;
+ u = ((v & S_ISUID ? TSUID : 0)
+ | (v & S_ISGID ? TSGID : 0)
+ | (v & S_ISVTX ? TSVTX : 0)
+ | (v & S_IRUSR ? TUREAD : 0)
+ | (v & S_IWUSR ? TUWRITE : 0)
+ | (v & S_IXUSR ? TUEXEC : 0)
+ | (v & S_IRGRP ? TGREAD : 0)
+ | (v & S_IWGRP ? TGWRITE : 0)
+ | (v & S_IXGRP ? TGEXEC : 0)
+ | (v & S_IROTH ? TOREAD : 0)
+ | (v & S_IWOTH ? TOWRITE : 0)
+ | (v & S_IXOTH ? TOEXEC : 0));
+ }
+ to_chars (negative, u, sizeof v, 0, p, s, "mode_t");
}
+
void
-off_to_oct (off_t v, char *p, size_t s)
+off_to_chars (off_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "off_t");
+ to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "off_t");
}
+
void
-size_to_oct (size_t v, char *p, size_t s)
+size_to_chars (size_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "size_t");
+ to_chars (0, (uintmax_t) v, sizeof v, 0, p, s, "size_t");
}
+
void
-time_to_oct (time_t v, char *p, size_t s)
+time_to_chars (time_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "time_t");
+ to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "time_t");
}
+
+static uintmax_t
+uid_substitute (int *negative)
+{
+ uid_t r;
+#ifdef UID_NOBODY
+ r = UID_NOBODY;
+#else
+ static uid_t uid_nobody;
+ if (!uid_nobody && !uname_to_uid ("nobody", &uid_nobody))
+ uid_nobody = -2;
+ r = uid_nobody;
+#endif
+ *negative = r < 0;
+ return r;
+}
+
void
-uid_to_oct (uid_t v, char *p, size_t s)
+uid_to_chars (uid_t v, char *p, size_t s)
{
- to_oct ((uintmax_t) v, p, s, "uid_t");
+ to_chars (v < 0, (uintmax_t) v, sizeof v, uid_substitute, p, s, "uid_t");
}
+
void
-uintmax_to_oct (uintmax_t v, char *p, size_t s)
+uintmax_to_chars (uintmax_t v, char *p, size_t s)
{
- to_oct (v, p, s, "uintmax_t");
+ to_chars (0, v, sizeof v, 0, p, s, "uintmax_t");
}
\f
/* Writing routines. */
}
/*-------------------------------------------------------------------------.
-| Write the EOT block(s). We actually zero at least one block, through |
+| Write the EOT block(s). We zero at least two blocks, through |
| the end of the record. Old tar, as previous versions of GNU tar, writes |
| garbage after two zeroed blocks. |
`-------------------------------------------------------------------------*/
write_eot (void)
{
union block *pointer = find_next_block ();
-
- if (pointer)
- {
- size_t space = available_space_after (pointer);
-
- memset (pointer->buffer, 0, space);
- set_next_block_after (pointer);
- }
+ memset (pointer->buffer, 0, BLOCKSIZE);
+ set_next_block_after (pointer);
+ pointer = find_next_block ();
+ memset (pointer->buffer, 0, available_space_after (pointer));
+ set_next_block_after (pointer);
}
/*-----------------------------------------------------.
\f
/* Header handling. */
-/*---------------------------------------------------------------------.
-| Make a header block for the file name whose stat info is st. Return |
-| header pointer for success, NULL if the name is too long. |
-`---------------------------------------------------------------------*/
+/* Make a header block for the file whose stat info is st,
+ and return its address. */
static union block *
start_header (const char *name, struct stat *st)
if (!absolute_names_option)
{
- static int warned_once = 0;
+ size_t prefix_len = FILESYSTEM_PREFIX_LEN (name);
-#if MSDOS
- if (name[1] == ':')
+ if (prefix_len)
{
- name += 2;
+ static int warned_once;
if (!warned_once)
{
warned_once = 1;
- WARN ((0, 0, _("Removing drive spec from names in the archive")));
+ WARN ((0, 0, _("Removing `%.*s' prefix from member names"),
+ (int) prefix_len, name));
}
+ name += prefix_len;
}
-#endif
while (*name == '/')
{
- name++; /* force relative path */
+ static int warned_once;
if (!warned_once)
{
warned_once = 1;
- WARN ((0, 0, _("\
-Removing leading `/' from absolute path names in the archive")));
+ WARN ((0, 0, _("Removing leading `/' from member names")));
}
+ name++;
}
- }
- /* Check the file name and put it in the block. */
+ {
+ static int warned_once;
+ if (! warned_once && contains_dot_dot (name))
+ {
+ warned_once = 1;
+ WARN ((0, 0, _("Member names contain `..'")));
+ }
+ }
+ }
- if (strlen (name) >= (size_t) NAME_FIELD_SIZE)
+ if (sizeof header->header.name <= strlen (name))
write_long (name, GNUTYPE_LONGNAME);
header = find_next_block ();
memset (header->buffer, 0, sizeof (union block));
if (group_option != (gid_t) -1)
st->st_gid = group_option;
if (mode_option)
- st->st_mode = ((st->st_mode & S_IFMT)
+ st->st_mode = ((st->st_mode & ~MODE_ALL)
| mode_adjust (st->st_mode, mode_option));
/* Paul Eggert tried the trivial test ($WRITER cf a b; $READER tvf a)
acceptor for Paul's test. */
if (archive_format == V7_FORMAT)
- MODE_TO_OCT (st->st_mode & 07777, header->header.mode);
+ MODE_TO_CHARS (st->st_mode & MODE_ALL, header->header.mode);
else
- MODE_TO_OCT (st->st_mode, header->header.mode);
+ MODE_TO_CHARS (st->st_mode, header->header.mode);
- UID_TO_OCT (st->st_uid, header->header.uid);
- GID_TO_OCT (st->st_gid, header->header.gid);
- OFF_TO_OCT (st->st_size, header->header.size);
- TIME_TO_OCT (st->st_mtime, header->header.mtime);
+ UID_TO_CHARS (st->st_uid, header->header.uid);
+ GID_TO_CHARS (st->st_gid, header->header.gid);
+ OFF_TO_CHARS (st->st_size, header->header.size);
+ TIME_TO_CHARS (st->st_mtime, header->header.mtime);
if (incremental_option)
if (archive_format == OLDGNU_FORMAT)
{
- TIME_TO_OCT (st->st_atime, header->oldgnu_header.atime);
- TIME_TO_OCT (st->st_ctime, header->oldgnu_header.ctime);
+ TIME_TO_CHARS (st->st_atime, header->oldgnu_header.atime);
+ TIME_TO_CHARS (st->st_ctime, header->oldgnu_header.ctime);
}
header->header.typeflag = archive_format == V7_FORMAT ? AREGTYPE : REGTYPE;
switch (archive_format)
{
- case DEFAULT_FORMAT:
case V7_FORMAT:
break;
strncpy (header->header.magic, TMAGIC, TMAGLEN);
strncpy (header->header.version, TVERSION, TVERSLEN);
break;
+
+ default:
+ abort ();
}
if (archive_format == V7_FORMAT || numeric_owner_option)
int sum;
char *p;
- memcpy (header->header.chksum, CHKBLANKS, sizeof (header->header.chksum));
+ memcpy (header->header.chksum, CHKBLANKS, sizeof header->header.chksum);
sum = 0;
p = header->buffer;
- for (i = sizeof (*header); i-- != 0; )
+ for (i = sizeof *header; i-- != 0; )
/* We can't use unsigned char here because of old compilers, e.g. V7. */
sum += 0xFF & *p++;
/* Fill in the checksum field. It's formatted differently from the
other fields: it has [6] digits, a null, then a space -- rather than
- digits, a space, then a null. We use to_oct then write the null in
- over to_oct's space. The final space is already there, from
- checksumming, and to_oct doesn't modify it.
+ digits, then a null. We use to_chars.
+ The final space is already there, from
+ checksumming, and to_chars doesn't modify it.
This is a fast way to do:
sprintf(header->header.chksum, "%6o", sum); */
- UINTMAX_TO_OCT ((uintmax_t) sum, header->header.chksum);
- header->header.chksum[6] = '\0'; /* zap the space */
-
- set_next_block_after (header);
+ uintmax_to_chars ((uintmax_t) sum, header->header.chksum, 7);
if (verbose_option
&& header->header.typeflag != GNUTYPE_LONGLINK
current_format = archive_format;
print_header ();
}
+
+ set_next_block_after (header);
}
\f
/* Sparse file processing. */
/* Make room for our scratch space -- initially is 10 elts long. */
- sparsearray = (struct sp_array *)
- xmalloc (sp_array_size * sizeof (struct sp_array));
+ sparsearray = xmalloc (sp_array_size * sizeof (struct sp_array));
for (counter = 0; counter < sp_array_size; counter++)
{
sparsearray[counter].offset = 0;
| ? |
`---*/
-static void
-find_new_file_size (off_t *filesize, int highest_index)
+static off_t
+find_new_file_size (int sparses)
{
- int counter;
-
- *filesize = 0;
- for (counter = 0;
- sparsearray[counter].numbytes && counter <= highest_index;
- counter++)
- *filesize += sparsearray[counter].numbytes;
+ int i;
+ off_t s = 0;
+ for (i = 0; i < sparses; i++)
+ s += sparsearray[i].numbytes;
+ return s;
}
/*-----------------------------------------------------------------------.
size_t numbytes = 0;
off_t offset = 0;
int file;
- int sparse_index = 0;
+ int sparses = 0;
ssize_t count;
char buffer[BLOCKSIZE];
init_sparsearray ();
clear_buffer (buffer);
- while (count = read (file, buffer, sizeof buffer), count != 0)
+ while (0 < (count = safe_read (file, buffer, sizeof buffer)))
{
/* Realloc the scratch area as necessary. FIXME: should reallocate
only at beginning of a new instance of non-zero data. */
- if (sparse_index > sp_array_size - 1)
+ if (sp_array_size <= sparses)
{
-
- sparsearray = (struct sp_array *)
+ sparsearray =
xrealloc (sparsearray,
2 * sp_array_size * sizeof (struct sp_array));
sp_array_size *= 2;
{
if (numbytes)
{
- sparsearray[sparse_index++].numbytes = numbytes;
+ sparsearray[sparses++].numbytes = numbytes;
numbytes = 0;
}
}
else
{
if (!numbytes)
- sparsearray[sparse_index].offset = offset;
+ sparsearray[sparses].offset = offset;
numbytes += count;
}
if (!zero_block_p (buffer))
{
if (!numbytes)
- sparsearray[sparse_index].offset = offset;
+ sparsearray[sparses].offset = offset;
numbytes += count;
}
else
}
if (numbytes)
- sparsearray[sparse_index++].numbytes = numbytes;
+ sparsearray[sparses++].numbytes = numbytes;
else
{
- sparsearray[sparse_index].offset = offset - 1;
- sparsearray[sparse_index++].numbytes = 1;
+ sparsearray[sparses].offset = offset - 1;
+ sparsearray[sparses++].numbytes = 1;
}
close (file);
- return sparse_index - 1;
+ return count < 0 ? 0 : sparses;
}
/*---.
{
union block *start;
size_t bufsize;
- int sparse_index = 0;
+ int sparses = 0;
ssize_t count;
while (*sizeleft > 0)
{
start = find_next_block ();
memset (start->buffer, 0, BLOCKSIZE);
- bufsize = sparsearray[sparse_index].numbytes;
- if (!bufsize)
- {
- /* We blew it, maybe. */
- char buf1[UINTMAX_STRSIZE_BOUND];
- char buf2[UINTMAX_STRSIZE_BOUND];
-
- ERROR ((0, 0, _("Wrote %s of %s bytes to file %s"),
- STRINGIFY_BIGINT (fullsize - *sizeleft, buf1),
- STRINGIFY_BIGINT (fullsize, buf2),
- name));
- break;
- }
+ bufsize = sparsearray[sparses].numbytes;
+ if (! bufsize)
+ abort ();
- if (lseek (file, sparsearray[sparse_index++].offset, 0) < 0)
+ if (lseek (file, sparsearray[sparses++].offset, SEEK_SET) < 0)
{
- char buf[UINTMAX_STRSIZE_BOUND];
- ERROR ((0, errno, _("lseek error at byte %s in file %s"),
- STRINGIFY_BIGINT (sparsearray[sparse_index - 1].offset, buf),
- name));
+ (ignore_failed_read_option ? seek_warn_details : seek_error_details)
+ (name, sparsearray[sparses - 1].offset);
break;
}
while (bufsize > BLOCKSIZE)
{
-#if 0
- if (amount_read)
- {
- count = read (file, start->buffer + amount_read,
- BLOCKSIZE - amount_read);
- bufsize -= BLOCKSIZE - amount_read;
- amount_read = 0;
- set_next_block_after (start);
- start = find_next_block ();
- memset (start->buffer, 0, BLOCKSIZE);
- }
-#endif
- /* Store the data. */
-
- count = read (file, start->buffer, BLOCKSIZE);
+ count = safe_read (file, start->buffer, BLOCKSIZE);
if (count < 0)
{
- char buf[UINTMAX_STRSIZE_BOUND];
- ERROR ((0, errno, _("\
-Read error at byte %s, reading %lu bytes, in file %s"),
- STRINGIFY_BIGINT (fullsize - *sizeleft, buf),
- (unsigned long) bufsize, name));
+ (ignore_failed_read_option
+ ? read_warn_details
+ : read_error_details)
+ (name, fullsize - *sizeleft, bufsize);
return 1;
}
bufsize -= count;
char buffer[BLOCKSIZE];
clear_buffer (buffer);
- count = read (file, buffer, bufsize);
+ count = safe_read (file, buffer, bufsize);
memcpy (start->buffer, buffer, BLOCKSIZE);
}
if (count < 0)
{
- char buf[UINTMAX_STRSIZE_BOUND];
-
- ERROR ((0, errno,
- _("Read error at byte %s, reading %lu bytes, in file %s"),
- STRINGIFY_BIGINT (fullsize - *sizeleft, buf),
- (unsigned long) bufsize, name));
+ (ignore_failed_read_option
+ ? read_warn_details
+ : read_error_details)
+ (name, fullsize - *sizeleft, bufsize);
return 1;
}
-#if 0
- if (amount_read >= BLOCKSIZE)
- {
- amount_read = 0;
- set_next_block_after (start + (count - 1) / BLOCKSIZE);
- if (count != bufsize)
- {
- ERROR ((0, 0,
- _("File %s shrunk, padding with zeros"),
- name));
- return 1;
- }
- start = find_next_block ();
- }
- else
- amount_read += bufsize;
-#endif
+
*sizeleft -= count;
set_next_block_after (start);
-
}
free (sparsearray);
#if 0
collect_and_sort_names ();
while (p = name_from_list (), p)
- dump_file (p, (dev_t) -1, 1);
+ if (!excluded_name (p))
+ dump_file (p, -1, (dev_t) 0);
blank_name_list ();
while (p = name_from_list (), p)
- {
- strcpy (buffer, p);
- if (p[strlen (p) - 1] != '/')
- strcat (buffer, "/");
- bufp = buffer + strlen (buffer);
- for (q = gnu_list_name->dir_contents;
- q && *q;
- q += strlen (q) + 1)
- {
- if (*q == 'Y')
- {
- strcpy (bufp, q + 1);
- dump_file (buffer, (dev_t) -1, 1);
- }
- }
- }
+ if (!excluded_name (p))
+ {
+ strcpy (buffer, p);
+ if (p[strlen (p) - 1] != '/')
+ strcat (buffer, "/");
+ bufp = buffer + strlen (buffer);
+ q = gnu_list_name->dir_contents;
+ if (q)
+ for (; *q; q += strlen (q) + 1)
+ if (*q == 'Y')
+ {
+ strcpy (bufp, q + 1);
+ dump_file (buffer, -1, (dev_t) 0);
+ }
+ }
free (buffer);
}
else
{
while (p = name_next (1), p)
- dump_file (p, (dev_t) -1, 1);
+ if (!excluded_name (p))
+ dump_file (p, 1, (dev_t) 0);
}
write_eot ();
close_archive ();
if (listed_incremental_option)
- write_dir_file ();
+ write_directory_file ();
}
-/*----------------------------------------------------------------------.
-| Dump a single file. Recurse on directories. Result is nonzero for |
-| success. P is file name to dump. PARENT_DEVICE is device our parent |
-| directory was on. TOP_LEVEL tells wether we are a toplevel call. |
-| |
-| Sets global CURRENT_STAT to stat output for this file. |
-`----------------------------------------------------------------------*/
+/* Dump a single file, recursing on directories. P is the file name
+ to dump. TOP_LEVEL tells whether this is a top-level call; zero
+ means no, positive means yes, and negative means an incremental
+ dump. PARENT_DEVICE is the device of P's
+ parent directory; it is examined only if TOP_LEVEL is zero.
+
+ Set global CURRENT_STAT to stat output for this file. */
/* FIXME: One should make sure that for *every* path leading to setting
exit_status to failure, a clear diagnostic has been issued. */
void
-dump_file (char *p, dev_t parent_device, int top_level)
+dump_file (char *p, int top_level, dev_t parent_device)
{
union block *header;
char type;
union block *exhdr;
char save_typeflag;
+ time_t original_ctime;
struct utimbuf restore_times;
- /* FIXME: `header' and `upperbound' might be used uninitialized in this
+ /* FIXME: `header' and `sparses' might be used uninitialized in this
function. Reported by Bruno Haible. */
if (interactive_option && !confirm ("add", p))
return;
- /* Use stat if following (rather than dumping) 4.2BSD's symbolic links.
- Otherwise, use lstat (which falls back to stat if no symbolic links). */
-
- if (dereference_option != 0
-#ifdef STX_HIDDEN /* AIX */
- ? statx (p, ¤t_stat, STATSIZE, STX_HIDDEN)
- : statx (p, ¤t_stat, STATSIZE, STX_HIDDEN | STX_LINK)
-#else
- ? stat (p, ¤t_stat) : lstat (p, ¤t_stat)
-#endif
- )
+ if (deref_stat (dereference_option, p, ¤t_stat) != 0)
{
- WARN ((0, errno, _("Cannot add file %s"), p));
- if (!ignore_failed_read_option)
- exit_status = TAREXIT_FAILURE;
+ if (ignore_failed_read_option)
+ stat_warn (p);
+ else
+ stat_error (p);
return;
}
+ original_ctime = current_stat.st_ctime;
restore_times.actime = current_stat.st_atime;
restore_times.modtime = current_stat.st_mtime;
}
#endif
- /* See if we only want new files, and check if this one is too old to
+ /* See if we want only new files, and check if this one is too old to
put in the archive. */
- if (!incremental_option && !S_ISDIR (current_stat.st_mode)
+ if ((0 < top_level || !incremental_option)
+ && !S_ISDIR (current_stat.st_mode)
&& current_stat.st_mtime < newer_mtime_option
&& (!after_date_option || current_stat.st_ctime < newer_ctime_option))
{
- if (parent_device == (dev_t) -1)
- WARN ((0, 0, _("%s: is unchanged; not dumped"), p));
+ if (0 < top_level)
+ WARN ((0, 0, _("%s: file is unchanged; not dumped"),
+ quotearg_colon (p)));
/* FIXME: recheck this return. */
return;
}
if (ar_dev && current_stat.st_dev == ar_dev && current_stat.st_ino == ar_ino)
{
- WARN ((0, 0, _("%s is the archive; not dumped"), p));
+ WARN ((0, 0, _("%s: file is the archive; not dumped"),
+ quotearg_colon (p)));
return;
}
#endif
- /* Check for multiple links.
-
- We maintain a list of all such files that we've written so far. Any
- time we see another, we check the list and avoid dumping the data
- again if we've done it once already. */
-
- if (current_stat.st_nlink > 1
- && (S_ISREG (current_stat.st_mode)
-#ifdef S_ISCTG
- || S_ISCTG (current_stat.st_mode)
-#endif
-#ifdef S_ISCHR
- || S_ISCHR (current_stat.st_mode)
-#endif
-#ifdef S_ISBLK
- || S_ISBLK (current_stat.st_mode)
-#endif
-#ifdef S_ISFIFO
- || S_ISFIFO (current_stat.st_mode)
-#endif
- ))
- {
- struct link *lp;
-
- /* FIXME: First quick and dirty. Hashing, etc later. */
-
- for (lp = linklist; lp; lp = lp->next)
- if (lp->ino == current_stat.st_ino && lp->dev == current_stat.st_dev)
- {
- char *link_name = lp->name;
-
- /* We found a link. */
-
- while (!absolute_names_option && *link_name == '/')
- {
- static int warned_once = 0;
-
- if (!warned_once)
- {
- warned_once = 1;
- WARN ((0, 0, _("\
-Removing leading `/' from absolute links")));
- }
- link_name++;
- }
- if (strlen (link_name) >= NAME_FIELD_SIZE)
- write_long (link_name, GNUTYPE_LONGLINK);
- assign_string (¤t_link_name, link_name);
-
- current_stat.st_size = 0;
- header = start_header (p, ¤t_stat);
- if (header == NULL)
- {
- exit_status = TAREXIT_FAILURE;
- return;
- }
- strncpy (header->header.linkname,
- link_name, NAME_FIELD_SIZE);
-
- /* Force null truncated. */
-
- header->header.linkname[NAME_FIELD_SIZE - 1] = 0;
-
- header->header.typeflag = LNKTYPE;
- finish_header (header);
-
- /* FIXME: Maybe remove from list after all links found? */
-
- if (remove_files_option)
- if (unlink (p) == -1)
- ERROR ((0, errno, _("Cannot remove %s"), p));
-
- /* We dumped it. */
- return;
- }
-
- /* Not found. Add it to the list of possible links. */
-
- lp = (struct link *)
- xmalloc ((size_t) (sizeof (struct link) + strlen (p)));
- lp->ino = current_stat.st_ino;
- lp->dev = current_stat.st_dev;
- strcpy (lp->name, p);
- lp->next = linklist;
- linklist = lp;
- }
-
- /* This is not a link to a previously dumped file, so dump it. */
-
- if (S_ISREG (current_stat.st_mode)
-#ifdef S_ISCTG
- || S_ISCTG (current_stat.st_mode)
-#endif
- )
- {
- int f; /* file descriptor */
- size_t bufsize;
- ssize_t count;
- off_t sizeleft;
- union block *start;
- int header_moved;
- char isextended = 0;
- int upperbound;
-#if 0
- static int cried_once = 0;
-#endif
-
- header_moved = 0;
-
- if (sparse_option)
- {
- /* Check the size of the file against the number of blocks
- allocated for it, counting both data and indirect blocks.
- If there is a smaller number of blocks that would be
- necessary to accommodate a file of this size, this is safe
- to say that we have a sparse file: at least one of those
- blocks in the file is just a useless hole. For sparse
- files not having more hole blocks than indirect blocks, the
- sparseness will go undetected. */
-
- /* Bruno Haible sent me these statistics for Linux. It seems
- that some filesystems count indirect blocks in st_blocks,
- while others do not seem to:
-
- minix-fs tar: size=7205, st_blocks=18 and ST_NBLOCKS=18
- extfs tar: size=7205, st_blocks=18 and ST_NBLOCKS=18
- ext2fs tar: size=7205, st_blocks=16 and ST_NBLOCKS=16
- msdos-fs tar: size=7205, st_blocks=16 and ST_NBLOCKS=16
-
- Dick Streefland reports the previous numbers as misleading,
- because ext2fs use 12 direct blocks, while minix-fs uses only
- 6 direct blocks. Dick gets:
-
- ext2 size=20480 ls listed blocks=21
- minix size=20480 ls listed blocks=21
- msdos size=20480 ls listed blocks=20
-
- It seems that indirect blocks *are* included in st_blocks.
- The minix filesystem does not account for phantom blocks in
- st_blocks, so `du' and `ls -s' give wrong results. So, the
- --sparse option would not work on a minix filesystem. */
-
- if (ST_NBLOCKS (current_stat)
- < (current_stat.st_size / ST_NBLOCKSIZE
- + (current_stat.st_size % ST_NBLOCKSIZE != 0)))
- {
- off_t filesize = current_stat.st_size;
- int counter;
-
- header = start_header (p, ¤t_stat);
- if (header == NULL)
- {
- exit_status = TAREXIT_FAILURE;
- return;
- }
- header->header.typeflag = GNUTYPE_SPARSE;
- header_moved = 1;
-
- /* Call the routine that figures out the layout of the
- sparse file in question. UPPERBOUND is the index of the
- last element of the "sparsearray," i.e., the number of
- elements it needed to describe the file. */
-
- upperbound = deal_with_sparse (p, header);
-
- /* See if we'll need an extended header later. */
-
- if (upperbound > SPARSES_IN_OLDGNU_HEADER - 1)
- header->oldgnu_header.isextended = 1;
-
- /* We store the "real" file size so we can show that in
- case someone wants to list the archive, i.e., tar tvf
- <file>. It might be kind of disconcerting if the
- shrunken file size was the one that showed up. */
-
- OFF_TO_OCT (current_stat.st_size,
- header->oldgnu_header.realsize);
-
- /* This will be the new "size" of the file, i.e., the size
- of the file minus the blocks of holes that we're
- skipping over. */
-
- find_new_file_size (&filesize, upperbound);
- current_stat.st_size = filesize;
- OFF_TO_OCT (filesize, header->header.size);
-
- for (counter = 0; counter < SPARSES_IN_OLDGNU_HEADER; counter++)
- {
- if (!sparsearray[counter].numbytes)
- break;
-
- OFF_TO_OCT (sparsearray[counter].offset,
- header->oldgnu_header.sp[counter].offset);
- SIZE_TO_OCT (sparsearray[counter].numbytes,
- header->oldgnu_header.sp[counter].numbytes);
- }
-
- }
- }
- else
- upperbound = SPARSES_IN_OLDGNU_HEADER - 1;
-
- sizeleft = current_stat.st_size;
-
- /* Don't bother opening empty, world readable files. Also do not open
- files when archive is meant for /dev/null. */
-
- if (dev_null_output
- || (sizeleft == 0 && 0444 == (0444 & current_stat.st_mode)))
- f = -1;
- else
- {
- f = open (p, O_RDONLY | O_BINARY);
- if (f < 0)
- {
- WARN ((0, errno, _("Cannot add file %s"), p));
- if (!ignore_failed_read_option)
- exit_status = TAREXIT_FAILURE;
- return;
- }
- }
-
- /* If the file is sparse, we've already taken care of this. */
-
- if (!header_moved)
- {
- header = start_header (p, ¤t_stat);
- if (header == NULL)
- {
- if (f >= 0)
- close (f);
- exit_status = TAREXIT_FAILURE;
- return;
- }
- }
-#ifdef S_ISCTG
- /* Mark contiguous files, if we support them. */
-
- if (archive_format != V7_FORMAT && S_ISCTG (current_stat.st_mode))
- header->header.typeflag = CONTTYPE;
-#endif
- isextended = header->oldgnu_header.isextended;
- save_typeflag = header->header.typeflag;
- finish_header (header);
- if (isextended)
- {
-#if 0
- int sum = 0;
-#endif
- int counter;
-#if 0
- union block *exhdr;
- int arraybound = SPARSES_IN_SPARSE_HEADER;
-#endif
- /* static */ int index_offset = SPARSES_IN_OLDGNU_HEADER;
-
- extend:
- exhdr = find_next_block ();
-
- if (exhdr == NULL)
- {
- exit_status = TAREXIT_FAILURE;
- return;
- }
- memset (exhdr->buffer, 0, BLOCKSIZE);
- for (counter = 0; counter < SPARSES_IN_SPARSE_HEADER; counter++)
- {
- if (counter + index_offset > upperbound)
- break;
-
- SIZE_TO_OCT (sparsearray[counter + index_offset].numbytes,
- exhdr->sparse_header.sp[counter].numbytes);
- OFF_TO_OCT (sparsearray[counter + index_offset].offset,
- exhdr->sparse_header.sp[counter].offset);
- }
- set_next_block_after (exhdr);
-#if 0
- sum += counter;
- if (sum < upperbound)
- goto extend;
-#endif
- if (index_offset + counter <= upperbound)
- {
- index_offset += counter;
- exhdr->sparse_header.isextended = 1;
- goto extend;
- }
-
- }
- if (save_typeflag == GNUTYPE_SPARSE)
- {
- if (finish_sparse_file (f, &sizeleft, current_stat.st_size, p))
- goto padit;
- }
- else
- while (sizeleft > 0)
- {
- if (multi_volume_option)
- {
- assign_string (&save_name, p);
- save_sizeleft = sizeleft;
- save_totsize = current_stat.st_size;
- }
- start = find_next_block ();
-
- bufsize = available_space_after (start);
-
- if (sizeleft < bufsize)
- {
- /* Last read -- zero out area beyond. */
-
- bufsize = sizeleft;
- count = bufsize % BLOCKSIZE;
- if (count)
- memset (start->buffer + sizeleft, 0,
- (size_t) (BLOCKSIZE - count));
- }
- if (f < 0)
- count = bufsize;
- else
- count = read (f, start->buffer, bufsize);
- if (count < 0)
- {
- char buf[UINTMAX_STRSIZE_BOUND];
- ERROR ((0, errno, _("\
-Read error at byte %s, reading %lu bytes, in file %s"),
- STRINGIFY_BIGINT (current_stat.st_size - sizeleft,
- buf),
- (unsigned long) bufsize, p));
- goto padit;
- }
- sizeleft -= count;
-
- /* This is nonportable (the type of set_next_block_after's arg). */
-
- set_next_block_after (start + (count - 1) / BLOCKSIZE);
-
- if (count == bufsize)
- continue;
- else
- {
- char buf[UINTMAX_STRSIZE_BOUND];
- ERROR ((0, 0,
- _("File %s shrunk by %s bytes, padding with zeros"),
- p, STRINGIFY_BIGINT (sizeleft, buf)));
- goto padit; /* short read */
- }
- }
-
- if (multi_volume_option)
- assign_string (&save_name, NULL);
-
- if (f >= 0)
- {
- close (f);
- if (atime_preserve_option)
- utime (p, &restore_times);
- }
- if (remove_files_option)
- {
- if (unlink (p) == -1)
- ERROR ((0, errno, _("Cannot remove %s"), p));
- }
- return;
-
- /* File shrunk or gave error, pad out tape to match the size we
- specified in the header. */
-
- padit:
- while (sizeleft > 0)
- {
- save_sizeleft = sizeleft;
- start = find_next_block ();
- memset (start->buffer, 0, BLOCKSIZE);
- set_next_block_after (start);
- sizeleft -= BLOCKSIZE;
- }
- if (multi_volume_option)
- assign_string (&save_name, NULL);
- if (f >= 0)
- {
- close (f);
- if (atime_preserve_option)
- utime (p, &restore_times);
- }
- return;
- }
-
-#ifdef S_ISLNK
- else if (S_ISLNK (current_stat.st_mode))
- {
- int size;
- char *buffer = (char *) alloca (PATH_MAX + 1);
-
- size = readlink (p, buffer, PATH_MAX + 1);
- if (size < 0)
- {
- WARN ((0, errno, _("Cannot add file %s"), p));
- if (!ignore_failed_read_option)
- exit_status = TAREXIT_FAILURE;
- return;
- }
- buffer[size] = '\0';
- if (size >= NAME_FIELD_SIZE)
- write_long (buffer, GNUTYPE_LONGLINK);
- assign_string (¤t_link_name, buffer);
-
- current_stat.st_size = 0; /* force 0 size on symlink */
- header = start_header (p, ¤t_stat);
- if (header == NULL)
- {
- exit_status = TAREXIT_FAILURE;
- return;
- }
- strncpy (header->header.linkname, buffer, NAME_FIELD_SIZE);
- header->header.linkname[NAME_FIELD_SIZE - 1] = '\0';
- header->header.typeflag = SYMTYPE;
- finish_header (header); /* nothing more to do to it */
- if (remove_files_option)
- {
- if (unlink (p) == -1)
- ERROR ((0, errno, _("Cannot remove %s"), p));
- }
- return;
- }
-#endif /* S_ISLNK */
-
- else if (S_ISDIR (current_stat.st_mode))
+ if (S_ISDIR (current_stat.st_mode))
{
DIR *directory;
struct dirent *entry;
size_t len;
dev_t our_device = current_stat.st_dev;
- /* If this tar program is installed suid root, like for Amanda, the
- access might look like denied, while it is not really.
+ errno = 0;
- FIXME: I have the feeling this test is done too early. Couldn't it
- just be bundled in later actions? I guess that the proper support
- of --ignore-failed-read is the key of the current writing. */
-
- if (access (p, R_OK) == -1 && geteuid () != 0)
+ directory = opendir (p);
+ if (! directory)
{
- WARN ((0, errno, _("Cannot add directory %s"), p));
- if (!ignore_failed_read_option)
- exit_status = TAREXIT_FAILURE;
+ if (ignore_failed_read_option)
+ opendir_warn (p);
+ else
+ opendir_error (p);
return;
}
namebuf[len++] = '/';
namebuf[len] = '\0';
- if (1)
+ if (! is_avoided_name (namebuf))
{
- /* The "1" above used to be "archive_format != V7_FORMAT", GNU tar
- was just not writing directory blocks at all. Daniel Trinkle
+ /* The condition above used to be "archive_format != V7_FORMAT".
+ GNU tar was not writing directory blocks at all. Daniel Trinkle
writes: ``All old versions of tar I have ever seen have
correctly archived an empty directory. The really old ones I
checked included HP-UX 7 and Mt. Xinu More/BSD. There may be
files, we'd better put the / on the name. */
header = start_header (namebuf, ¤t_stat);
- if (header == NULL)
- {
- exit_status = TAREXIT_FAILURE;
- return; /* eg name too long */
- }
if (incremental_option)
header->header.typeflag = GNUTYPE_DUMPDIR;
p_buffer += tmp;
}
totsize++;
- OFF_TO_OCT (totsize, header->header.size);
+ OFF_TO_CHARS (totsize, header->header.size);
finish_header (header);
p_buffer = buffer;
sizeleft = totsize;
bufsize = sizeleft;
count = bufsize % BLOCKSIZE;
if (count)
- memset (start->buffer + sizeleft, 0,
- (size_t) (BLOCKSIZE - count));
+ memset (start->buffer + sizeleft, 0, BLOCKSIZE - count);
}
memcpy (start->buffer, p_buffer, bufsize);
sizeleft -= bufsize;
set_next_block_after (start + (bufsize - 1) / BLOCKSIZE);
}
if (multi_volume_option)
- assign_string (&save_name, NULL);
- if (atime_preserve_option)
- utime (p, &restore_times);
- return;
+ assign_string (&save_name, 0);
+ goto finish_dir;
}
/* See if we are about to recurse into a directory, and avoid doing
so if the user wants that we do not descend into directories. */
if (no_recurse_option)
- return;
+ goto finish_dir;
/* See if we are crossing from one file system to another, and
avoid doing so if the user only wants to dump one file system. */
&& parent_device != current_stat.st_dev)
{
if (verbose_option)
- WARN ((0, 0, _("%s: On a different filesystem; not dumped"), p));
- return;
+ WARN ((0, 0,
+ _("%s: file is on a different filesystem; not dumped"),
+ quotearg_colon (p)));
+ goto finish_dir;
}
/* Now output all the files in the directory. */
- errno = 0; /* FIXME: errno should be read-only */
-
- directory = opendir (p);
- if (!directory)
- {
- ERROR ((0, errno, _("Cannot open directory %s"), p));
- return;
- }
-
- /* Hack to remove "./" from the front of all the file names. */
-
- if (len == 2 && namebuf[0] == '.' && namebuf[1] == '/')
- len = 0;
-
/* FIXME: Should speed this up by cd-ing into the dir. */
- while (entry = readdir (directory), entry)
+ while (errno = 0, (entry = readdir (directory)))
{
- /* Skip `.' and `..'. */
+ /* Skip `.', `..', and excluded file names. */
if (is_dot_or_dotdot (entry->d_name))
continue;
if ((int) NAMLEN (entry) + len >= buflen)
{
buflen = len + NAMLEN (entry);
- namebuf = (char *) xrealloc (namebuf, buflen + 1);
-#if 0
- namebuf[len] = '\0';
- ERROR ((0, 0, _("File name %s%s too long"),
- namebuf, entry->d_name));
- continue;
-#endif
+ namebuf = xrealloc (namebuf, buflen + 1);
}
strcpy (namebuf + len, entry->d_name);
- if (exclude_option && check_exclude (namebuf))
- continue;
- dump_file (namebuf, our_device, 0);
+ if (!excluded_name (namebuf))
+ dump_file (namebuf, 0, our_device);
+ }
+
+ if (errno)
+ {
+ if (ignore_failed_read_option)
+ readdir_warn (p);
+ else
+ readdir_error (p);
+ }
+
+ finish_dir:
+ if (closedir (directory) != 0)
+ {
+ if (ignore_failed_read_option)
+ closedir_warn (p);
+ else
+ closedir_error (p);
}
- closedir (directory);
free (namebuf);
if (atime_preserve_option)
utime (p, &restore_times);
return;
}
+ else if (is_avoided_name (p))
+ return;
+ else
+ {
+ /* Check for multiple links.
-#ifdef S_ISCHR
- else if (S_ISCHR (current_stat.st_mode))
- type = CHRTYPE;
-#endif
+ We maintain a list of all such files that we've written so far. Any
+ time we see another, we check the list and avoid dumping the data
+ again if we've done it once already. */
-#ifdef S_ISBLK
- else if (S_ISBLK (current_stat.st_mode))
- type = BLKTYPE;
-#endif
+ if (1 < current_stat.st_nlink)
+ {
+ struct link *lp;
- /* Avoid screwy apollo lossage where S_IFIFO == S_IFSOCK. */
+ /* FIXME: First quick and dirty. Hashing, etc later. */
-#if (_ISP__M68K == 0) && (_ISP__A88K == 0) && defined(S_ISFIFO)
- else if (S_ISFIFO (current_stat.st_mode))
- type = FIFOTYPE;
-#endif
+ for (lp = linklist; lp; lp = lp->next)
+ if (lp->ino == current_stat.st_ino
+ && lp->dev == current_stat.st_dev)
+ {
+ char *link_name = lp->name;
-#ifdef S_ISSOCK
- else if (S_ISSOCK (current_stat.st_mode))
- type = FIFOTYPE;
-#endif
+ /* We found a link. */
- else
- goto unknown;
+ while (!absolute_names_option && *link_name == '/')
+ {
+ static int warned_once;
+ if (!warned_once)
+ {
+ warned_once = 1;
+ WARN ((0, 0,
+ _("Removing leading `/' from link names")));
+ }
+ link_name++;
+ }
+ if (strlen (link_name) >= NAME_FIELD_SIZE)
+ write_long (link_name, GNUTYPE_LONGLINK);
+ assign_string (¤t_link_name, link_name);
+
+ current_stat.st_size = 0;
+ header = start_header (p, ¤t_stat);
+ strncpy (header->header.linkname,
+ link_name, NAME_FIELD_SIZE);
+
+ /* Force null truncated. */
+
+ header->header.linkname[NAME_FIELD_SIZE - 1] = 0;
+
+ header->header.typeflag = LNKTYPE;
+ finish_header (header);
+
+ /* FIXME: Maybe remove from list after all links found? */
+
+ if (remove_files_option)
+ if (unlink (p) == -1)
+ unlink_error (p);
+
+ /* We dumped it. */
+ return;
+ }
+
+ /* Not found. Add it to the list of possible links. */
+
+ lp = xmalloc (sizeof (struct link) + strlen (p));
+ lp->ino = current_stat.st_ino;
+ lp->dev = current_stat.st_dev;
+ strcpy (lp->name, p);
+ lp->next = linklist;
+ linklist = lp;
+ }
+
+ /* This is not a link to a previously dumped file, so dump it. */
+
+ if (S_ISREG (current_stat.st_mode)
+ || S_ISCTG (current_stat.st_mode))
+ {
+ int f; /* file descriptor */
+ size_t bufsize;
+ ssize_t count;
+ off_t sizeleft;
+ union block *start;
+ int header_moved;
+ char isextended = 0;
+ int sparses;
+
+ header_moved = 0;
+
+ if (sparse_option)
+ {
+ /* Check the size of the file against the number of blocks
+ allocated for it, counting both data and indirect blocks.
+ If there is a smaller number of blocks that would be
+ necessary to accommodate a file of this size, this is safe
+ to say that we have a sparse file: at least one of those
+ blocks in the file is just a useless hole. For sparse
+ files not having more hole blocks than indirect blocks, the
+ sparseness will go undetected. */
+
+ /* Bruno Haible sent me these statistics for Linux. It seems
+ that some filesystems count indirect blocks in st_blocks,
+ while others do not seem to:
+
+ minix-fs tar: size=7205, st_blocks=18 and ST_NBLOCKS=18
+ extfs tar: size=7205, st_blocks=18 and ST_NBLOCKS=18
+ ext2fs tar: size=7205, st_blocks=16 and ST_NBLOCKS=16
+ msdos-fs tar: size=7205, st_blocks=16 and ST_NBLOCKS=16
+
+ Dick Streefland reports the previous numbers as misleading,
+ because ext2fs use 12 direct blocks, while minix-fs uses only
+ 6 direct blocks. Dick gets:
+
+ ext2 size=20480 ls listed blocks=21
+ minix size=20480 ls listed blocks=21
+ msdos size=20480 ls listed blocks=20
+
+ It seems that indirect blocks *are* included in st_blocks.
+ The minix filesystem does not account for phantom blocks in
+ st_blocks, so `du' and `ls -s' give wrong results. So, the
+ --sparse option would not work on a minix filesystem. */
+
+ if (ST_NBLOCKS (current_stat)
+ < (current_stat.st_size / ST_NBLOCKSIZE
+ + (current_stat.st_size % ST_NBLOCKSIZE != 0)))
+ {
+ int counter;
+
+ header = start_header (p, ¤t_stat);
+ header->header.typeflag = GNUTYPE_SPARSE;
+ header_moved = 1;
+
+ /* Call the routine that figures out the layout of the
+ sparse file in question. SPARSES is the index of the
+ first unused element of the "sparsearray," i.e.,
+ the number of elements it needed to describe the file. */
+
+ sparses = deal_with_sparse (p, header);
+
+ /* See if we'll need an extended header later. */
+
+ if (SPARSES_IN_OLDGNU_HEADER < sparses)
+ header->oldgnu_header.isextended = 1;
+
+ /* We store the "real" file size so we can show that in
+ case someone wants to list the archive, i.e., tar tvf
+ <file>. It might be kind of disconcerting if the
+ shrunken file size was the one that showed up. */
+
+ OFF_TO_CHARS (current_stat.st_size,
+ header->oldgnu_header.realsize);
+
+ /* This will be the new "size" of the file, i.e., the size
+ of the file minus the blocks of holes that we're
+ skipping over. */
+
+ current_stat.st_size = find_new_file_size (sparses);
+ OFF_TO_CHARS (current_stat.st_size, header->header.size);
+
+ for (counter = 0;
+ counter < sparses && counter < SPARSES_IN_OLDGNU_HEADER;
+ counter++)
+ {
+ OFF_TO_CHARS (sparsearray[counter].offset,
+ header->oldgnu_header.sp[counter].offset);
+ SIZE_TO_CHARS (sparsearray[counter].numbytes,
+ header->oldgnu_header.sp[counter].numbytes);
+ }
+ }
+ }
+ else
+ sparses = SPARSES_IN_OLDGNU_HEADER;
+
+ sizeleft = current_stat.st_size;
+
+ /* Don't bother opening empty, world readable files. Also do not open
+ files when archive is meant for /dev/null. */
+
+ if (dev_null_output
+ || (sizeleft == 0
+ && MODE_R == (MODE_R & current_stat.st_mode)))
+ f = -1;
+ else
+ {
+ f = open (p, O_RDONLY | O_BINARY);
+ if (f < 0)
+ {
+ if (! top_level && errno == ENOENT)
+ WARN ((0, 0, _("%s: File removed before we read it"),
+ quotearg_colon (p)));
+ else
+ (ignore_failed_read_option ? open_warn : open_error) (p);
+ return;
+ }
+ }
+
+ /* If the file is sparse, we've already taken care of this. */
+
+ if (!header_moved)
+ header = start_header (p, ¤t_stat);
+
+ /* Mark contiguous files, if we support them. */
+
+ if (archive_format != V7_FORMAT && S_ISCTG (current_stat.st_mode))
+ header->header.typeflag = CONTTYPE;
+
+ isextended = header->oldgnu_header.isextended;
+ save_typeflag = header->header.typeflag;
+ finish_header (header);
+ if (isextended)
+ {
+ int counter;
+ /* static */ int index_offset = SPARSES_IN_OLDGNU_HEADER;
+
+ extend:
+ exhdr = find_next_block ();
+ memset (exhdr->buffer, 0, BLOCKSIZE);
+ for (counter = 0; counter < SPARSES_IN_SPARSE_HEADER; counter++)
+ {
+ if (sparses <= counter + index_offset)
+ break;
+
+ SIZE_TO_CHARS (sparsearray[counter + index_offset].numbytes,
+ exhdr->sparse_header.sp[counter].numbytes);
+ OFF_TO_CHARS (sparsearray[counter + index_offset].offset,
+ exhdr->sparse_header.sp[counter].offset);
+ }
+ set_next_block_after (exhdr);
+ if (counter + index_offset < sparses)
+ {
+ index_offset += counter;
+ exhdr->sparse_header.isextended = 1;
+ goto extend;
+ }
+
+ }
+ if (save_typeflag == GNUTYPE_SPARSE)
+ {
+ if (f < 0
+ || finish_sparse_file (f, &sizeleft,
+ current_stat.st_size, p))
+ goto padit;
+ }
+ else
+ while (sizeleft > 0)
+ {
+ if (multi_volume_option)
+ {
+ assign_string (&save_name, p);
+ save_sizeleft = sizeleft;
+ save_totsize = current_stat.st_size;
+ }
+ start = find_next_block ();
+
+ bufsize = available_space_after (start);
+
+ if (sizeleft < bufsize)
+ {
+ /* Last read -- zero out area beyond. */
+
+ bufsize = sizeleft;
+ count = bufsize % BLOCKSIZE;
+ if (count)
+ memset (start->buffer + sizeleft, 0, BLOCKSIZE - count);
+ }
+ if (f < 0)
+ count = bufsize;
+ else
+ count = safe_read (f, start->buffer, bufsize);
+ if (count < 0)
+ {
+ (ignore_failed_read_option
+ ? read_warn_details
+ : read_error_details)
+ (p, current_stat.st_size - sizeleft, bufsize);
+ goto padit;
+ }
+ sizeleft -= count;
+
+ /* This is nonportable (the type of set_next_block_after's arg). */
+
+ set_next_block_after (start + (count - 1) / BLOCKSIZE);
+
+ if (count == bufsize)
+ continue;
+ else
+ {
+ char buf[UINTMAX_STRSIZE_BOUND];
+ WARN ((0, 0,
+ _("%s: File shrank by %s bytes; padding with zeros"),
+ quotearg_colon (p),
+ STRINGIFY_BIGINT (sizeleft, buf)));
+ if (! ignore_failed_read_option)
+ exit_status = TAREXIT_FAILURE;
+ goto padit; /* short read */
+ }
+ }
+
+ if (multi_volume_option)
+ assign_string (&save_name, 0);
+
+ if (f >= 0)
+ {
+ struct stat final_stat;
+ if (fstat (f, &final_stat) != 0)
+ {
+ if (ignore_failed_read_option)
+ stat_warn (p);
+ else
+ stat_error (p);
+ }
+ else if (final_stat.st_ctime != original_ctime)
+ {
+ char const *qp = quotearg_colon (p);
+ WARN ((0, 0, _("%s: file changed as we read it"), qp));
+ if (! ignore_failed_read_option)
+ exit_status = TAREXIT_FAILURE;
+ }
+ if (close (f) != 0)
+ {
+ if (ignore_failed_read_option)
+ close_warn (p);
+ else
+ close_error (p);
+ }
+ if (atime_preserve_option)
+ utime (p, &restore_times);
+ }
+ if (remove_files_option)
+ {
+ if (unlink (p) == -1)
+ unlink_error (p);
+ }
+ return;
+
+ /* File shrunk or gave error, pad out tape to match the size we
+ specified in the header. */
+
+ padit:
+ while (sizeleft > 0)
+ {
+ save_sizeleft = sizeleft;
+ start = find_next_block ();
+ memset (start->buffer, 0, BLOCKSIZE);
+ set_next_block_after (start);
+ sizeleft -= BLOCKSIZE;
+ }
+ if (multi_volume_option)
+ assign_string (&save_name, 0);
+ if (f >= 0)
+ {
+ close (f);
+ if (atime_preserve_option)
+ utime (p, &restore_times);
+ }
+ return;
+ }
+#ifdef HAVE_READLINK
+ else if (S_ISLNK (current_stat.st_mode))
+ {
+ int size;
+ char *buffer = (char *) alloca (PATH_MAX + 1);
+
+ size = readlink (p, buffer, PATH_MAX + 1);
+ if (size < 0)
+ {
+ if (ignore_failed_read_option)
+ readlink_warn (p);
+ else
+ readlink_error (p);
+ return;
+ }
+ buffer[size] = '\0';
+ if (size >= NAME_FIELD_SIZE)
+ write_long (buffer, GNUTYPE_LONGLINK);
+ assign_string (¤t_link_name, buffer);
+
+ current_stat.st_size = 0; /* force 0 size on symlink */
+ header = start_header (p, ¤t_stat);
+ strncpy (header->header.linkname, buffer, NAME_FIELD_SIZE);
+ header->header.linkname[NAME_FIELD_SIZE - 1] = '\0';
+ header->header.typeflag = SYMTYPE;
+ finish_header (header); /* nothing more to do to it */
+ if (remove_files_option)
+ {
+ if (unlink (p) == -1)
+ unlink_error (p);
+ }
+ return;
+ }
+#endif
+ else if (S_ISCHR (current_stat.st_mode))
+ type = CHRTYPE;
+ else if (S_ISBLK (current_stat.st_mode))
+ type = BLKTYPE;
+ else if (S_ISFIFO (current_stat.st_mode))
+ type = FIFOTYPE;
+ else if (S_ISSOCK (current_stat.st_mode))
+ {
+ WARN ((0, 0, _("%s: socket ignored"), quotearg_colon (p)));
+ return;
+ }
+ else if (S_ISDOOR (current_stat.st_mode))
+ {
+ WARN ((0, 0, _("%s: door ignored"), quotearg_colon (p)));
+ return;
+ }
+ else
+ goto unknown;
+ }
if (archive_format == V7_FORMAT)
goto unknown;
current_stat.st_size = 0; /* force 0 size */
header = start_header (p, ¤t_stat);
- if (header == NULL)
- {
- exit_status = TAREXIT_FAILURE;
- return; /* eg name too long */
- }
-
header->header.typeflag = type;
-#if defined(S_IFBLK) || defined(S_IFCHR)
if (type != FIFOTYPE)
{
- MAJOR_TO_OCT (major (current_stat.st_rdev), header->header.devmajor);
- MINOR_TO_OCT (minor (current_stat.st_rdev), header->header.devminor);
+ MAJOR_TO_CHARS (major (current_stat.st_rdev), header->header.devmajor);
+ MINOR_TO_CHARS (minor (current_stat.st_rdev), header->header.devminor);
}
-#endif
finish_header (header);
if (remove_files_option)
{
if (unlink (p) == -1)
- ERROR ((0, errno, _("Cannot remove %s"), p));
+ unlink_error (p);
}
return;
unknown:
- ERROR ((0, 0, _("%s: Unknown file type; file ignored"), p));
+ WARN ((0, 0, _("%s: Unknown file type; file ignored"),
+ quotearg_colon (p)));
+ if (! ignore_failed_read_option)
+ exit_status = TAREXIT_FAILURE;
}
projects / chaz / tar / blobdiff