#include <system.h>
#include <quotearg.h>
-#include <utimens.h>
#include "common.h"
#include <hash.h>
while (i);
}
+
+static bool
+to_chars (int negative, uintmax_t value, size_t valsize,
+ uintmax_t (*substitute) (int *),
+ char *where, size_t size, const char *type);
+
+static bool
+to_chars_subst (int negative, int gnu_format, uintmax_t value, size_t valsize,
+ uintmax_t (*substitute) (int *),
+ char *where, size_t size, const char *type)
+{
+ uintmax_t maxval = (gnu_format
+ ? 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 (gnu_format)
+ {
+ 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;
+ /* FIXME: This is the only place where GNU_FORMAT differs from
+ OLDGNU_FORMAT. Apart from this they are completely identical. */
+ 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));
+ return 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));
+ return false;
+}
+
/* 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
SUBSTITUTE the address of an 0-or-1 flag recording whether the
substitute value is negative. */
-static void
+static bool
to_chars (int negative, uintmax_t value, size_t valsize,
uintmax_t (*substitute) (int *),
char *where, size_t size, const char *type)
{
- int base256_allowed = (archive_format == GNU_FORMAT
- || archive_format == OLDGNU_FORMAT);
+ int gnu_format = (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);
+ return true;
}
-
- /* 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)
+ else if (gnu_format)
{
- where[0] = negative ? -1 : 1 << (LG_256 - 1);
- to_base256 (negative, value, where + 1, size - 1);
- }
+ /* Try to cope with the number by using traditional GNU format
+ methods */
- /* 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);
- }
-
- /* Otherwise, output a substitute value if possible (with a
- warning), and an error message if not. */
- else
- {
- 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)
+ /* Generate the base-256 representation if the number fits. */
+ if (((negative ? -1 - value : value)
+ <= MAX_VAL_WITH_DIGITS (size - 1, LG_256)))
{
- 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;
+ where[0] = negative ? -1 : 1 << (LG_256 - 1);
+ to_base256 (negative, value, where + 1, size - 1);
+ return true;
}
- else
- value_string = STRINGIFY_BIGINT (value, valbuf);
- if (substitute)
+ /* 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)
{
- int negsub;
- uintmax_t sub = substitute (&negsub) & maxval;
- /* FIXME: This is the only place where GNU_FORMAT differs from
- OLDGNU_FORMAT. Apart from this they are completely identical. */
- 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);
+ 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);
+ return true;
}
- else
- ERROR ((0, 0, _("value %s out of %s range %s..%s"),
- value_string, type, minval_string, maxval_string));
+ /* Otherwise fall back to substitution, if possible: */
}
+ else
+ substitute = NULL; /* No substitution for formats, other than GNU */
+
+ return to_chars_subst (negative, gnu_format, value, valsize, substitute,
+ where, size, type);
}
static uintmax_t
return r;
}
-void
+bool
gid_to_chars (gid_t v, char *p, size_t s)
{
- to_chars (v < 0, (uintmax_t) v, sizeof v, gid_substitute, p, s, "gid_t");
+ return to_chars (v < 0, (uintmax_t) v, sizeof v, gid_substitute, p, s, "gid_t");
}
-void
+bool
major_to_chars (major_t v, char *p, size_t s)
{
- to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "major_t");
+ return to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "major_t");
}
-void
+bool
minor_to_chars (minor_t v, char *p, size_t s)
{
- to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "minor_t");
+ return to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "minor_t");
}
-void
+bool
mode_to_chars (mode_t v, char *p, size_t s)
{
/* In the common case where the internal and external mode bits are the same,
| (v & S_IWOTH ? TOWRITE : 0)
| (v & S_IXOTH ? TOEXEC : 0));
}
- to_chars (negative, u, sizeof v, 0, p, s, "mode_t");
+ return to_chars (negative, u, sizeof v, 0, p, s, "mode_t");
}
-void
+bool
off_to_chars (off_t v, char *p, size_t s)
{
- to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "off_t");
+ return to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "off_t");
}
-void
+bool
size_to_chars (size_t v, char *p, size_t s)
{
- to_chars (0, (uintmax_t) v, sizeof v, 0, p, s, "size_t");
+ return to_chars (0, (uintmax_t) v, sizeof v, 0, p, s, "size_t");
}
-void
+bool
time_to_chars (time_t v, char *p, size_t s)
{
- to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "time_t");
+ return to_chars (v < 0, (uintmax_t) v, sizeof v, 0, p, s, "time_t");
}
static uintmax_t
return r;
}
-void
+bool
uid_to_chars (uid_t v, char *p, size_t s)
{
- to_chars (v < 0, (uintmax_t) v, sizeof v, uid_substitute, p, s, "uid_t");
+ return to_chars (v < 0, (uintmax_t) v, sizeof v, uid_substitute, p, s, "uid_t");
}
-void
+bool
uintmax_to_chars (uintmax_t v, char *p, size_t s)
{
- to_chars (0, v, sizeof v, 0, p, s, "uintmax_t");
+ return to_chars (0, v, sizeof v, 0, p, s, "uintmax_t");
}
void
finish_header (st, header, -1);
header = find_next_block ();
-
+
bufsize = available_space_after (header);
while (bufsize < size)
size_t i;
if (length > PREFIX_FIELD_SIZE)
- length = PREFIX_FIELD_SIZE+2;
+ length = PREFIX_FIELD_SIZE + 1;
for (i = length - 1; i > 0; i--)
if (ISSLASH (name[i]))
break;
union block *header, hp;
char *p;
int type;
-
+
if (extended_header.buffer || extended_header.stk == NULL)
return old_header;
xheader_store ("uid", st, NULL);
uid = 0;
}
- UID_TO_CHARS (uid, header->header.uid);
+ if (!UID_TO_CHARS (uid, header->header.uid))
+ return NULL;
}
{
xheader_store ("gid", st, NULL);
gid = 0;
}
- GID_TO_CHARS (gid, header->header.gid);
+ if (!GID_TO_CHARS (gid, header->header.gid))
+ return NULL;
}
{
xheader_store ("size", st, NULL);
size = 0;
}
- OFF_TO_CHARS (size, header->header.size);
+ if (!OFF_TO_CHARS (size, header->header.size))
+ return NULL;
}
{
if (MAX_OCTAL_VAL (header->header.mtime) < mtime.tv_sec)
mtime.tv_sec = 0;
}
- TIME_TO_CHARS (mtime.tv_sec, header->header.mtime);
+ if (!TIME_TO_CHARS (mtime.tv_sec, header->header.mtime))
+ return NULL;
}
/* FIXME */
xheader_store ("devmajor", st, NULL);
devmajor = 0;
}
- MAJOR_TO_CHARS (devmajor, header->header.devmajor);
+ if (!MAJOR_TO_CHARS (devmajor, header->header.devmajor))
+ return NULL;
if (archive_format == POSIX_FORMAT
&& MAX_OCTAL_VAL (header->header.devminor) < devminor)
xheader_store ("devminor", st, NULL);
devminor = 0;
}
- MINOR_TO_CHARS (devminor, header->header.devminor);
+ if (!MINOR_TO_CHARS (devminor, header->header.devminor))
+ return NULL;
}
else if (archive_format != GNU_FORMAT && archive_format != OLDGNU_FORMAT)
{
- MAJOR_TO_CHARS (0, header->header.devmajor);
- MINOR_TO_CHARS (0, header->header.devminor);
+ if (!(MAJOR_TO_CHARS (0, header->header.devmajor)
+ && MINOR_TO_CHARS (0, header->header.devminor)))
+ return NULL;
}
if (archive_format == POSIX_FORMAT)
return dump_status_ok;
}
-static void
-dump_regular_finish (int fd, struct tar_stat_info *st,
- struct timespec original_ctime)
-{
- if (fd >= 0)
- {
- struct stat final_stat;
- if (fstat (fd, &final_stat) != 0)
- {
- stat_diag (st->orig_file_name);
- }
- else if (timespec_cmp (get_stat_ctime (&final_stat), original_ctime)
- != 0)
- {
- WARN ((0, 0, _("%s: file changed as we read it"),
- quotearg_colon (st->orig_file_name)));
- }
- if (close (fd) != 0)
- {
- close_diag (st->orig_file_name);
- }
- }
- if (remove_files_option)
- {
- if (unlink (st->orig_file_name) == -1)
- unlink_error (st->orig_file_name);
- }
-}
-
/* Look in directory DIRNAME for a cache directory tag file
with the magic name "CACHEDIR.TAG" and a standard header,
as described at:
size_t bufsize;
ssize_t count;
const char *buffer, *p_buffer;
-
+
block_ordinal = current_block_ordinal ();
- buffer = gnu_list_name->dir_contents;
+ buffer = gnu_list_name->dir_contents;
if (buffer)
totsize = dumpdir_size (buffer);
else
finish_header (st, blk, block_ordinal);
p_buffer = buffer;
size_left = totsize;
-
+
mv_begin (st);
mv_total_size (totsize);
while (size_left > 0)
}
static bool
-dump_dir (struct tar_stat_info *st, int top_level, dev_t parent_device)
+dump_dir (int fd, struct tar_stat_info *st, int top_level, dev_t parent_device)
{
- char *directory;
-
- directory = savedir (st->orig_file_name);
+ char *directory = fdsavedir (fd);
if (!directory)
{
savedir_diag (st->orig_file_name);
}
static void
-unknown_file_error (char *p)
+unknown_file_error (char const *p)
{
WARN ((0, 0, _("%s: Unknown file type; file ignored"),
quotearg_colon (p)));
again if we've done it once already. */
static Hash_table *link_table;
-/* Try to dump stat as a hard link to another file in the archive. If
- succeeded returns true */
+/* Try to dump stat as a hard link to another file in the archive.
+ Return true if successful. */
static bool
dump_hard_link (struct tar_stat_info *st)
{
st->stat.st_size = 0;
blk = start_header (st);
if (!blk)
- return true;
+ return false;
tar_copy_str (blk->header.linkname, link_name, NAME_FIELD_SIZE);
blk->header.typeflag = LNKTYPE;
exit_status to failure, a clear diagnostic has been issued. */
static void
-dump_file0 (struct tar_stat_info *st, char *p,
+dump_file0 (struct tar_stat_info *st, char const *p,
int top_level, dev_t parent_device)
{
union block *header;
struct timespec original_ctime;
struct timespec restore_times[2];
off_t block_ordinal = -1;
+ bool is_dir;
if (interactive_option && !confirm ("add", p))
return;
if (is_avoided_name (p))
return;
- if (S_ISDIR (st->stat.st_mode))
- {
- dump_dir (st, top_level, parent_device);
- if (atime_preserve_option)
- utimens (p, restore_times);
- return;
- }
- else
- {
- /* Check for multiple links. */
- if (dump_hard_link (st))
- return;
- /* This is not a link to a previously dumped file, so dump it. */
+ is_dir = S_ISDIR (st->stat.st_mode) != 0;
- if (S_ISREG (st->stat.st_mode)
- || S_ISCTG (st->stat.st_mode))
- {
- int fd;
- enum dump_status status;
+ if (!is_dir && dump_hard_link (st))
+ return;
+
+ if (is_dir || S_ISREG (st->stat.st_mode) || S_ISCTG (st->stat.st_mode))
+ {
+ bool ok;
+ int fd = -1;
+ struct stat final_stat;
- if (file_dumpable_p (st))
+ if (is_dir || file_dumpable_p (st))
+ {
+ fd = open (p,
+ (O_RDONLY | O_BINARY
+ | (is_dir ? O_DIRECTORY | O_NONBLOCK : 0)
+ | (atime_preserve_option == system_atime_preserve
+ ? O_NOATIME
+ : 0)));
+ if (fd < 0)
{
- fd = open (st->orig_file_name,
- O_RDONLY | O_BINARY);
- if (fd < 0)
- {
- if (!top_level && errno == ENOENT)
- WARN ((0, 0, _("%s: File removed before we read it"),
- quotearg_colon (st->orig_file_name)));
- else
- open_diag (st->orig_file_name);
- return;
- }
+ if (!top_level && errno == ENOENT)
+ WARN ((0, 0, _("%s: File removed before we read it"),
+ quotearg_colon (p)));
+ else
+ open_diag (p);
+ return;
}
- else
+ }
+
+ if (is_dir)
+ {
+ ok = dump_dir (fd, st, top_level, parent_device);
+
+ /* dump_dir consumes FD if successful. */
+ if (ok)
fd = -1;
+ }
+ else
+ {
+ enum dump_status status;
if (fd != -1 && sparse_option && sparse_file_p (st))
{
switch (status)
{
case dump_status_ok:
- mv_end ();
- dump_regular_finish (fd, st, original_ctime);
- break;
-
case dump_status_short:
mv_end ();
- close (fd);
break;
case dump_status_fail:
- close (fd);
- return;
+ break;
case dump_status_not_implemented:
abort ();
}
- if (atime_preserve_option)
- utimens (st->orig_file_name, restore_times);
file_count_links (st);
- return;
+
+ ok = status == dump_status_ok;
}
-#ifdef HAVE_READLINK
- else if (S_ISLNK (st->stat.st_mode))
+
+ if (ok)
{
- char *buffer;
- int size;
- size_t linklen = st->stat.st_size;
- if (linklen != st->stat.st_size || linklen + 1 == 0)
- xalloc_die ();
- buffer = (char *) alloca (linklen + 1);
- size = readlink (p, buffer, linklen + 1);
- if (size < 0)
+ /* If possible, reopen a directory if we are preserving
+ atimes, so that we can set just the atime on systems with
+ _FIOSATIME. */
+ if (fd < 0 && is_dir
+ && atime_preserve_option == replace_atime_preserve)
+ fd = open (p, O_RDONLY | O_BINARY | O_DIRECTORY | O_NONBLOCK);
+
+ if ((fd < 0
+ ? deref_stat (dereference_option, p, &final_stat)
+ : fstat (fd, &final_stat))
+ != 0)
{
- readlink_diag (p);
- return;
+ stat_diag (p);
+ ok = false;
}
- buffer[size] = '\0';
- assign_string (&st->link_name, buffer);
- if (NAME_FIELD_SIZE - (archive_format == OLDGNU_FORMAT) < size)
- write_long_link (st);
+ }
- block_ordinal = current_block_ordinal ();
- st->stat.st_size = 0; /* force 0 size on symlink */
- header = start_header (st);
- if (!header)
- return;
- tar_copy_str (header->header.linkname, buffer, NAME_FIELD_SIZE);
- header->header.typeflag = SYMTYPE;
- finish_header (st, header, block_ordinal);
- /* nothing more to do to it */
-
- if (remove_files_option)
+ if (ok)
+ {
+ if (timespec_cmp (get_stat_ctime (&final_stat), original_ctime) != 0)
+ WARN ((0, 0, _("%s: file changed as we read it"),
+ quotearg_colon (p)));
+ else if (atime_preserve_option == replace_atime_preserve
+ && set_file_atime (fd, p, restore_times) != 0)
+ utime_error (p);
+ }
+
+ if (0 <= fd && close (fd) != 0)
+ {
+ close_diag (p);
+ ok = false;
+ }
+
+ if (ok && remove_files_option)
+ {
+ if (is_dir)
{
- if (unlink (p) == -1)
+ if (rmdir (p) != 0 && errno != ENOTEMPTY)
+ rmdir_error (p);
+ }
+ else
+ {
+ if (unlink (p) != 0)
unlink_error (p);
}
- file_count_links (st);
- return;
- }
-#endif
- else if (S_ISCHR (st->stat.st_mode))
- type = CHRTYPE;
- else if (S_ISBLK (st->stat.st_mode))
- type = BLKTYPE;
- else if (S_ISFIFO (st->stat.st_mode))
- type = FIFOTYPE;
- else if (S_ISSOCK (st->stat.st_mode))
- {
- WARN ((0, 0, _("%s: socket ignored"), quotearg_colon (p)));
- return;
}
- else if (S_ISDOOR (st->stat.st_mode))
+
+ return;
+ }
+#ifdef HAVE_READLINK
+ else if (S_ISLNK (st->stat.st_mode))
+ {
+ char *buffer;
+ int size;
+ size_t linklen = st->stat.st_size;
+ if (linklen != st->stat.st_size || linklen + 1 == 0)
+ xalloc_die ();
+ buffer = (char *) alloca (linklen + 1);
+ size = readlink (p, buffer, linklen + 1);
+ if (size < 0)
{
- WARN ((0, 0, _("%s: door ignored"), quotearg_colon (p)));
+ readlink_diag (p);
return;
}
- else
+ buffer[size] = '\0';
+ assign_string (&st->link_name, buffer);
+ if (NAME_FIELD_SIZE - (archive_format == OLDGNU_FORMAT) < size)
+ write_long_link (st);
+
+ block_ordinal = current_block_ordinal ();
+ st->stat.st_size = 0; /* force 0 size on symlink */
+ header = start_header (st);
+ if (!header)
+ return;
+ tar_copy_str (header->header.linkname, buffer, NAME_FIELD_SIZE);
+ header->header.typeflag = SYMTYPE;
+ finish_header (st, header, block_ordinal);
+ /* nothing more to do to it */
+
+ if (remove_files_option)
{
- unknown_file_error (p);
- return;
+ if (unlink (p) == -1)
+ unlink_error (p);
}
+ file_count_links (st);
+ return;
+ }
+#endif
+ else if (S_ISCHR (st->stat.st_mode))
+ type = CHRTYPE;
+ else if (S_ISBLK (st->stat.st_mode))
+ type = BLKTYPE;
+ else if (S_ISFIFO (st->stat.st_mode))
+ type = FIFOTYPE;
+ else if (S_ISSOCK (st->stat.st_mode))
+ {
+ WARN ((0, 0, _("%s: socket ignored"), quotearg_colon (p)));
+ return;
+ }
+ else if (S_ISDOOR (st->stat.st_mode))
+ {
+ WARN ((0, 0, _("%s: door ignored"), quotearg_colon (p)));
+ return;
+ }
+ else
+ {
+ unknown_file_error (p);
+ return;
}
if (archive_format == V7_FORMAT)