X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Fcreate.c;h=6381f9fe6ff71d14e01b87484e8f51b277c190f9;hb=d659cbaccdc1f3279c49107cf15f15a639738529;hp=4c954c46012c38d7f4953518caabdbfffb03f6e6;hpb=e5882c8220222cf238264c77ffca95aa166f5830;p=chaz%2Ftar diff --git a/src/create.c b/src/create.c index 4c954c4..6381f9f 100644 --- a/src/create.c +++ b/src/create.c @@ -1,7 +1,7 @@ /* Create a tar archive. Copyright (C) 1985, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001, - 2003, 2004 Free Software Foundation, Inc. + 2003, 2004, 2005 Free Software Foundation, Inc. Written by John Gilmore, on 1985-08-25. @@ -17,21 +17,12 @@ 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 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ -#include "system.h" - -#if HAVE_UTIME_H -# include -#else -struct utimbuf - { - long actime; - long modtime; - }; -#endif +#include #include +#include #include "common.h" #include @@ -51,6 +42,10 @@ struct link ? ((uintmax_t) 1 << ((digits) * (bits_per_digit))) - 1 \ : (uintmax_t) -1) +/* The maximum uintmax_t value that can be represented with octal + digits and a trailing NUL in BUFFER. */ +#define MAX_OCTAL_VAL(buffer) MAX_VAL_WITH_DIGITS (sizeof (buffer) - 1, LG_8) + /* 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. */ @@ -69,6 +64,29 @@ to_octal (uintmax_t value, char *where, size_t size) while (i); } +/* Copy at most LEN bytes from the string SRC to DST. Terminate with + NUL unless SRC is LEN or more bytes long. */ + +static void +tar_copy_str (char *dst, const char *src, size_t len) +{ + size_t i; + for (i = 0; i < len; i++) + if (! (dst[i] = src[i])) + break; +} + +/* Same as tar_copy_str, but always terminate with NUL if using + is OLDGNU format */ + +static void +tar_name_copy_str (char *dst, const char *src, size_t len) +{ + tar_copy_str (dst, src, len); + if (archive_format == OLDGNU_FORMAT) + dst[len-1] = 0; +} + /* 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. @@ -325,10 +343,10 @@ uintmax_to_chars (uintmax_t v, char *p, size_t s) } void -string_to_chars (char *str, char *p, size_t s) +string_to_chars (char const *str, char *p, size_t s) { - strncpy (p, str, s); - p[s-1] = 0; + tar_copy_str (p, str, s); + p[s - 1] = '\0'; } @@ -337,11 +355,11 @@ string_to_chars (char *str, char *p, size_t s) b) current archive is /dev/null */ bool -file_dumpable_p (struct tar_stat_info *stat) +file_dumpable_p (struct tar_stat_info *st) { return !(dev_null_output - || (stat->archive_file_size == 0 - && (stat->stat.st_mode & MODE_R) == MODE_R)); + || (st->archive_file_size == 0 + && (st->stat.st_mode & MODE_R) == MODE_R)); } @@ -361,25 +379,16 @@ write_eot (void) set_next_block_after (pointer); } -/* Copy at most LEN bytes from SRC to DST. Terminate with NUL unless - SRC is LEN characters long */ -static void -tar_copy_str (char *dst, const char *src, size_t len) -{ - dst[len-1] = 0; - strncpy (dst, src, len); -} - /* Write a "private" header */ union block * start_private_header (const char *name, size_t size) { time_t t; union block *header = find_next_block (); - + memset (header->buffer, 0, sizeof (union block)); - tar_copy_str (header->header.name, name, NAME_FIELD_SIZE); + tar_name_copy_str (header->header.name, name, NAME_FIELD_SIZE); OFF_TO_CHARS (size, header->header.size); time (&t); @@ -388,7 +397,7 @@ start_private_header (const char *name, size_t size) UID_TO_CHARS (getuid (), header->header.uid); GID_TO_CHARS (getgid (), header->header.gid); MAJOR_TO_CHARS (0, header->header.devmajor); - MAJOR_TO_CHARS (0, header->header.devminor); + MINOR_TO_CHARS (0, header->header.devminor); strncpy (header->header.magic, TMAGIC, TMAGLEN); strncpy (header->header.version, TVERSION, TVERSLEN); return header; @@ -397,15 +406,20 @@ start_private_header (const char *name, size_t size) /* Create a new header and store there at most NAME_FIELD_SIZE bytes of the file name */ -static union block * +static union block * write_short_name (struct tar_stat_info *st) { union block *header = find_next_block (); memset (header->buffer, 0, sizeof (union block)); - tar_copy_str (header->header.name, st->file_name, NAME_FIELD_SIZE); + tar_name_copy_str (header->header.name, st->file_name, NAME_FIELD_SIZE); return header; } +#define FILL(field,byte) do { \ + memset(field, byte, sizeof(field)-1); \ + (field)[sizeof(field)-1] = 0; \ +} while (0) + /* Write a GNUTYPE_LONGLINK or GNUTYPE_LONGNAME block. */ static void write_gnu_long_link (struct tar_stat_info *st, const char *p, char type) @@ -413,8 +427,22 @@ write_gnu_long_link (struct tar_stat_info *st, const char *p, char type) size_t size = strlen (p) + 1; size_t bufsize; union block *header; + char *tmpname; header = start_private_header ("././@LongLink", size); + FILL(header->header.mtime, '0'); + FILL(header->header.mode, '0'); + FILL(header->header.uid, '0'); + FILL(header->header.gid, '0'); + FILL(header->header.devmajor, 0); + FILL(header->header.devminor, 0); + uid_to_uname (0, &tmpname); + UNAME_TO_CHARS (tmpname, header->header.uname); + free (tmpname); + gid_to_gname (0, &tmpname); + GNAME_TO_CHARS (tmpname, header->header.gname); + free (tmpname); + strcpy (header->header.magic, OLDGNU_MAGIC); header->header.typeflag = type; finish_header (st, header, -1); @@ -459,18 +487,18 @@ write_ustar_long_name (const char *name) if (length > PREFIX_FIELD_SIZE + NAME_FIELD_SIZE + 1) { - WARN ((0, 0, _("%s: file name is too long (max %d); not dumped"), - quotearg_colon (name), - PREFIX_FIELD_SIZE + NAME_FIELD_SIZE + 1)); + ERROR ((0, 0, _("%s: file name is too long (max %d); not dumped"), + quotearg_colon (name), + PREFIX_FIELD_SIZE + NAME_FIELD_SIZE + 1)); return NULL; } - + i = split_long_name (name, length); if (i == 0 || length - i - 1 > NAME_FIELD_SIZE) { - WARN ((0, 0, - _("%s: file name is too long (cannot be split); not dumped"), - quotearg_colon (name))); + ERROR ((0, 0, + _("%s: file name is too long (cannot be split); not dumped"), + quotearg_colon (name))); return NULL; } @@ -478,7 +506,7 @@ write_ustar_long_name (const char *name) memset (header->buffer, 0, sizeof (header->buffer)); memcpy (header->header.prefix, name, i); memcpy (header->header.name, name + i + 1, length - i - 1); - + return header; } @@ -495,11 +523,11 @@ write_long_link (struct tar_stat_info *st) case V7_FORMAT: /* old V7 tar format */ case USTAR_FORMAT: case STAR_FORMAT: - WARN ((0, 0, - _("%s: link name is too long; not dumped"), - quotearg_colon (st->link_name))); - break; - + ERROR ((0, 0, + _("%s: link name is too long; not dumped"), + quotearg_colon (st->link_name))); + break; + case OLDGNU_FORMAT: case GNU_FORMAT: write_gnu_long_link (st, st->link_name, GNUTYPE_LONGLINK); @@ -519,11 +547,20 @@ write_long_name (struct tar_stat_info *st) xheader_store ("path", st, NULL); break; - case V7_FORMAT: + case V7_FORMAT: + if (strlen (st->file_name) > NAME_FIELD_SIZE-1) + { + ERROR ((0, 0, _("%s: file name is too long (max %d); not dumped"), + quotearg_colon (st->file_name), + NAME_FIELD_SIZE - 1)); + return NULL; + } + break; + case USTAR_FORMAT: case STAR_FORMAT: return write_ustar_long_name (st->file_name); - + case OLDGNU_FORMAT: case GNU_FORMAT: write_gnu_long_link (st, st->file_name, GNUTYPE_LONGNAME); @@ -534,17 +571,16 @@ write_long_name (struct tar_stat_info *st) } return write_short_name (st); } - + static union block * write_extended (struct tar_stat_info *st, union block *old_header) { union block *header, hp; - size_t size; char *p; if (extended_header.buffer || extended_header.stk == NULL) - return old_header; - + return old_header; + xheader_finish (&extended_header); memcpy (hp.buffer, old_header, sizeof (hp)); p = xheader_xhdr_name (st); @@ -555,7 +591,7 @@ write_extended (struct tar_stat_info *st, union block *old_header) return header; } -static union block * +static union block * write_header_name (struct tar_stat_info *st) { if (archive_format == POSIX_FORMAT && !string_ascii_p (st->file_name)) @@ -563,7 +599,8 @@ write_header_name (struct tar_stat_info *st) xheader_store ("path", st, NULL); return write_short_name (st); } - else if (NAME_FIELD_SIZE < strlen (st->file_name)) + else if (NAME_FIELD_SIZE - (archive_format == OLDGNU_FORMAT) + < strlen (st->file_name)) return write_long_name (st); else return write_short_name (st); @@ -591,8 +628,9 @@ start_header (struct tar_stat_info *st) if (group_option != (gid_t) -1) st->stat.st_gid = group_option; if (mode_option) - st->stat.st_mode = ((st->stat.st_mode & ~MODE_ALL) - | mode_adjust (st->stat.st_mode, mode_option)); + st->stat.st_mode = + ((st->stat.st_mode & ~MODE_ALL) + | mode_adjust (st->stat.st_mode, mode_option, initial_umask)); /* Paul Eggert tried the trivial test ($WRITER cf a b; $READER tvf a) for a few tars and came up with the following interoperability @@ -622,46 +660,81 @@ start_header (struct tar_stat_info *st) else MODE_TO_CHARS (st->stat.st_mode, header->header.mode); - if (st->stat.st_uid > MAXOCTAL7 && archive_format == POSIX_FORMAT) - xheader_store ("uid", st, NULL); - else - UID_TO_CHARS (st->stat.st_uid, header->header.uid); - - if (st->stat.st_gid > MAXOCTAL7 && archive_format == POSIX_FORMAT) - xheader_store ("gid", st, NULL); - else - GID_TO_CHARS (st->stat.st_gid, header->header.gid); + { + uid_t uid = st->stat.st_uid; + if (archive_format == POSIX_FORMAT + && MAX_OCTAL_VAL (header->header.uid) < uid) + { + xheader_store ("uid", st, NULL); + uid = 0; + } + UID_TO_CHARS (uid, header->header.uid); + } - if (st->stat.st_size > MAXOCTAL11 && archive_format == POSIX_FORMAT) - xheader_store ("size", st, NULL); - else - OFF_TO_CHARS (st->stat.st_size, header->header.size); + { + gid_t gid = st->stat.st_gid; + if (archive_format == POSIX_FORMAT + && MAX_OCTAL_VAL (header->header.gid) < gid) + { + xheader_store ("gid", st, NULL); + gid = 0; + } + GID_TO_CHARS (gid, header->header.gid); + } + + { + off_t size = st->stat.st_size; + if (archive_format == POSIX_FORMAT + && MAX_OCTAL_VAL (header->header.size) < size) + { + xheader_store ("size", st, NULL); + size = 0; + } + OFF_TO_CHARS (size, header->header.size); + } - TIME_TO_CHARS (st->stat.st_mtime, header->header.mtime); + { + struct timespec mtime = get_stat_mtime (&st->stat); + if (archive_format == POSIX_FORMAT) + { + if (MAX_OCTAL_VAL (header->header.mtime) < mtime.tv_sec + || mtime.tv_nsec != 0) + xheader_store ("mtime", st, NULL); + if (MAX_OCTAL_VAL (header->header.mtime) < mtime.tv_sec) + mtime.tv_sec = 0; + } + TIME_TO_CHARS (mtime.tv_sec, header->header.mtime); + } /* FIXME */ if (S_ISCHR (st->stat.st_mode) || S_ISBLK (st->stat.st_mode)) { - st->devmajor = major (st->stat.st_rdev); - st->devminor = minor (st->stat.st_rdev); + major_t devmajor = major (st->stat.st_rdev); + minor_t devminor = minor (st->stat.st_rdev); - if (st->devmajor > MAXOCTAL7 && archive_format == POSIX_FORMAT) - xheader_store ("devmajor", st, NULL); - else - MAJOR_TO_CHARS (st->devmajor, header->header.devmajor); + if (archive_format == POSIX_FORMAT + && MAX_OCTAL_VAL (header->header.devmajor) < devmajor) + { + xheader_store ("devmajor", st, NULL); + devmajor = 0; + } + MAJOR_TO_CHARS (devmajor, header->header.devmajor); - if (st->devminor > MAXOCTAL7 && archive_format == POSIX_FORMAT) - xheader_store ("devminor", st, NULL); - else - MAJOR_TO_CHARS (st->devminor, header->header.devminor); + 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); } - else + 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 (archive_format == POSIX_FORMAT) { xheader_store ("atime", st, NULL); @@ -705,20 +778,18 @@ start_header (struct tar_stat_info *st) { uid_to_uname (st->stat.st_uid, &st->uname); gid_to_gname (st->stat.st_gid, &st->gname); - + if (archive_format == POSIX_FORMAT && (strlen (st->uname) > UNAME_FIELD_SIZE || !string_ascii_p (st->uname))) xheader_store ("uname", st, NULL); - else - UNAME_TO_CHARS (st->uname, header->header.uname); + UNAME_TO_CHARS (st->uname, header->header.uname); if (archive_format == POSIX_FORMAT && (strlen (st->gname) > GNAME_FIELD_SIZE || !string_ascii_p (st->gname))) xheader_store ("gname", st, NULL); - else - GNAME_TO_CHARS (st->gname, header->header.gname); + GNAME_TO_CHARS (st->gname, header->header.gname); } return header; @@ -762,10 +833,6 @@ void finish_header (struct tar_stat_info *st, union block *header, off_t block_ordinal) { - size_t i; - int sum; - char *p; - /* Note: It is important to do this before the call to write_extended(), so that the actual ustar header is printed */ if (verbose_option @@ -798,40 +865,40 @@ pad_archive (off_t size_left) set_next_block_after (blk); size_left -= BLOCKSIZE; } -} +} static enum dump_status -dump_regular_file (int fd, struct tar_stat_info *stat) +dump_regular_file (int fd, struct tar_stat_info *st) { - off_t size_left = stat->stat.st_size; + off_t size_left = st->stat.st_size; off_t block_ordinal; union block *blk; - + block_ordinal = current_block_ordinal (); - blk = start_header (stat); + blk = start_header (st); if (!blk) return dump_status_fail; /* Mark contiguous files, if we support them. */ - if (archive_format != V7_FORMAT && S_ISCTG (stat->stat.st_mode)) + if (archive_format != V7_FORMAT && S_ISCTG (st->stat.st_mode)) blk->header.typeflag = CONTTYPE; - finish_header (stat, blk, block_ordinal); + finish_header (st, blk, block_ordinal); while (size_left > 0) { size_t bufsize, count; - + if (multi_volume_option) { - assign_string (&save_name, stat->file_name); + assign_string (&save_name, st->orig_file_name); save_sizeleft = size_left; - save_totsize = stat->stat.st_size; + save_totsize = st->stat.st_size; } blk = find_next_block (); - + bufsize = available_space_after (blk); - + if (size_left < bufsize) { /* Last read -- zero out area beyond. */ @@ -840,18 +907,18 @@ dump_regular_file (int fd, struct tar_stat_info *stat) if (count) memset (blk->buffer + size_left, 0, BLOCKSIZE - count); } - + count = (fd < 0) ? bufsize : safe_read (fd, blk->buffer, bufsize); - if (count < 0) + if (count == SAFE_READ_ERROR) { - read_diag_details (stat->orig_file_name, - stat->stat.st_size - size_left, bufsize); + read_diag_details (st->orig_file_name, + st->stat.st_size - size_left, bufsize); pad_archive (size_left); return dump_status_short; } size_left -= count; - - set_next_block_after (blk + (bufsize - 1) / BLOCKSIZE); + if (count) + set_next_block_after (blk + (bufsize - 1) / BLOCKSIZE); if (count != bufsize) { @@ -861,19 +928,20 @@ dump_regular_file (int fd, struct tar_stat_info *stat) ngettext ("%s: File shrank by %s byte; padding with zeros", "%s: File shrank by %s bytes; padding with zeros", size_left), - quotearg_colon (stat->orig_file_name), + quotearg_colon (st->orig_file_name), STRINGIFY_BIGINT (size_left, buf))); if (! ignore_failed_read_option) exit_status = TAREXIT_FAILURE; - pad_archive (size_left); + pad_archive (size_left - (bufsize-count)); return dump_status_short; } } return dump_status_ok; } -void -dump_regular_finish (int fd, struct tar_stat_info *st, time_t original_ctime) +static void +dump_regular_finish (int fd, struct tar_stat_info *st, + struct timespec original_ctime) { if (fd >= 0) { @@ -882,7 +950,9 @@ dump_regular_finish (int fd, struct tar_stat_info *st, time_t original_ctime) { stat_diag (st->orig_file_name); } - else if (final_stat.st_ctime != original_ctime) + else if (final_stat.st_ctime != original_ctime.tv_sec + || (get_stat_ctime (&final_stat).tv_nsec + != original_ctime.tv_nsec)) { WARN ((0, 0, _("%s: file changed as we read it"), quotearg_colon (st->orig_file_name))); @@ -899,22 +969,63 @@ dump_regular_finish (int fd, struct tar_stat_info *st, time_t original_ctime) } } -void +/* Look in directory DIRNAME for a cache directory tag file + with the magic name "CACHEDIR.TAG" and a standard header, + as described at: + http://www.brynosaurus.com/cachedir + Applications can write this file into directories they create + for use as caches containing purely regenerable, non-precious data, + allowing us to avoid archiving them if --exclude-caches is specified. */ + +#define CACHEDIR_SIGNATURE "Signature: 8a477f597d28d172789f06886806bc55" +#define CACHEDIR_SIGNATURE_SIZE (sizeof CACHEDIR_SIGNATURE - 1) + +static bool +check_cache_directory (char *dirname) +{ + static char tagname[] = "CACHEDIR.TAG"; + char *tagpath; + int fd; + int tag_present = false; + + tagpath = xmalloc (strlen (dirname) + strlen (tagname) + 1); + strcpy (tagpath, dirname); + strcat (tagpath, tagname); + + fd = open (tagpath, O_RDONLY); + if (fd >= 0) + { + static char tagbuf[CACHEDIR_SIGNATURE_SIZE]; + + if (read (fd, tagbuf, CACHEDIR_SIGNATURE_SIZE) + == CACHEDIR_SIGNATURE_SIZE + && memcmp (tagbuf, CACHEDIR_SIGNATURE, CACHEDIR_SIGNATURE_SIZE) == 0) + tag_present = true; + + close (fd); + } + + free (tagpath); + + return tag_present; +} + +static void dump_dir0 (char *directory, - struct tar_stat_info *stat, int top_level, dev_t parent_device) + struct tar_stat_info *st, int top_level, dev_t parent_device) { - dev_t our_device = stat->stat.st_dev; - - if (!is_avoided_name (stat->orig_file_name)) + dev_t our_device = st->stat.st_dev; + + if (!is_avoided_name (st->orig_file_name)) { union block *blk = NULL; off_t block_ordinal = current_block_ordinal (); - stat->stat.st_size = 0; /* force 0 size on dir */ + st->stat.st_size = 0; /* force 0 size on dir */ - blk = start_header (stat); + blk = start_header (st); if (!blk) return; - + if (incremental_option) blk->header.typeflag = GNUTYPE_DUMPDIR; else /* if (standard_option) */ @@ -923,7 +1034,7 @@ dump_dir0 (char *directory, /* If we're gnudumping, we aren't done yet so don't close it. */ if (!incremental_option) - finish_header (stat, blk, block_ordinal); + finish_header (st, blk, block_ordinal); else if (gnu_list_name->dir_contents) { off_t size_left; @@ -931,8 +1042,8 @@ dump_dir0 (char *directory, size_t bufsize; ssize_t count; const char *buffer, *p_buffer; - off_t block_ordinal = current_block_ordinal (); - + + block_ordinal = current_block_ordinal (); buffer = gnu_list_name->dir_contents; /* FOO */ totsize = 0; if (buffer) @@ -944,14 +1055,14 @@ dump_dir0 (char *directory, } totsize++; OFF_TO_CHARS (totsize, blk->header.size); - finish_header (stat, blk, block_ordinal); + finish_header (st, blk, block_ordinal); p_buffer = buffer; size_left = totsize; while (size_left > 0) { if (multi_volume_option) { - assign_string (&save_name, stat->orig_file_name); + assign_string (&save_name, st->orig_file_name); save_sizeleft = size_left; save_totsize = totsize; } @@ -980,25 +1091,35 @@ dump_dir0 (char *directory, if (one_file_system_option && !top_level - && parent_device != stat->stat.st_dev) + && parent_device != st->stat.st_dev) { if (verbose_option) WARN ((0, 0, _("%s: file is on a different filesystem; not dumped"), - quotearg_colon (stat->orig_file_name))); + quotearg_colon (st->orig_file_name))); + return; + } + + if (exclude_caches_option + && check_cache_directory(st->orig_file_name)) + { + if (verbose_option) + WARN ((0, 0, + _("%s: contains a cache directory tag; not dumped"), + quotearg_colon (st->orig_file_name))); return; } { char const *entry; size_t entry_len; - char *name_buf = strdup (stat->orig_file_name); + char *name_buf = xstrdup (st->orig_file_name); size_t name_size = strlen (name_buf); size_t name_len = name_size; - + /* Now output all the files in the directory. */ /* FIXME: Should speed this up by cd-ing into the dir. */ - + for (entry = directory; (entry_len = strlen (entry)) != 0; entry += entry_len + 1) { @@ -1011,7 +1132,7 @@ dump_dir0 (char *directory, if (!excluded_name (name_buf)) dump_file (name_buf, 0, our_device); } - + free (name_buf); } } @@ -1029,22 +1150,22 @@ ensure_slash (char **pstr) (*pstr)[len] = '\0'; } -bool -dump_dir (struct tar_stat_info *stat, int top_level, dev_t parent_device) +static bool +dump_dir (struct tar_stat_info *st, int top_level, dev_t parent_device) { char *directory; - directory = savedir (stat->orig_file_name); + directory = savedir (st->orig_file_name); if (!directory) { - savedir_diag (stat->orig_file_name); + savedir_diag (st->orig_file_name); return false; } - ensure_slash (&stat->orig_file_name); - ensure_slash (&stat->file_name); + ensure_slash (&st->orig_file_name); + ensure_slash (&st->file_name); - dump_dir0 (directory, stat, top_level, parent_device); + dump_dir0 (directory, st, top_level, parent_device); free (directory); return true; @@ -1060,7 +1181,7 @@ create_archive (void) open_archive (ACCESS_WRITE); xheader_write_global (); - + if (incremental_option) { size_t buffer_size = 1000; @@ -1124,11 +1245,12 @@ create_archive (void) /* Calculate the hash of a link. */ -static unsigned -hash_link (void const *entry, unsigned n_buckets) +static size_t +hash_link (void const *entry, size_t n_buckets) { - struct link const *link = entry; - return (uintmax_t) (link->dev ^ link->ino) % n_buckets; + struct link const *l = entry; + uintmax_t num = l->dev ^ l->ino; + return num % n_buckets; } /* Compare two links for equality. */ @@ -1160,41 +1282,43 @@ static Hash_table *link_table; /* Try to dump stat as a hard link to another file in the archive. If succeeded returns true */ static bool -dump_hard_link (struct tar_stat_info *stat) +dump_hard_link (struct tar_stat_info *st) { - if (link_table && stat->stat.st_nlink > 1) + if (link_table && st->stat.st_nlink > 1) { struct link lp; - struct link *dup; + struct link *duplicate; off_t block_ordinal; union block *blk; - - lp.ino = stat->stat.st_ino; - lp.dev = stat->stat.st_dev; - if ((dup = hash_lookup (link_table, &lp))) + lp.ino = st->stat.st_ino; + lp.dev = st->stat.st_dev; + + if ((duplicate = hash_lookup (link_table, &lp))) { /* We found a link. */ - char const *link_name = safer_name_suffix (dup->name, true); + char const *link_name = safer_name_suffix (duplicate->name, true, + absolute_names_option); + + duplicate->nlink--; - dup->nlink--; - block_ordinal = current_block_ordinal (); - assign_string (&stat->link_name, link_name); - if (NAME_FIELD_SIZE < strlen (link_name)) - write_long_link (stat); - - stat->stat.st_size = 0; - blk = start_header (stat); + assign_string (&st->link_name, link_name); + if (NAME_FIELD_SIZE - (archive_format == OLDGNU_FORMAT) + < strlen (link_name)) + write_long_link (st); + + st->stat.st_size = 0; + blk = start_header (st); if (!blk) return true; tar_copy_str (blk->header.linkname, link_name, NAME_FIELD_SIZE); blk->header.typeflag = LNKTYPE; - finish_header (stat, blk, block_ordinal); + finish_header (st, blk, block_ordinal); - if (remove_files_option && unlink (stat->orig_file_name) != 0) - unlink_error (stat->orig_file_name); + if (remove_files_option && unlink (st->orig_file_name) != 0) + unlink_error (st->orig_file_name); return true; } @@ -1203,25 +1327,25 @@ dump_hard_link (struct tar_stat_info *stat) } static void -file_count_links (struct tar_stat_info *stat) +file_count_links (struct tar_stat_info *st) { - if (stat->stat.st_nlink > 1) + if (st->stat.st_nlink > 1) { - struct link *dup; + struct link *duplicate; struct link *lp = xmalloc (offsetof (struct link, name) - + strlen (stat->orig_file_name) + 1); - lp->ino = stat->stat.st_ino; - lp->dev = stat->stat.st_dev; - lp->nlink = stat->stat.st_nlink; - strcpy (lp->name, stat->orig_file_name); + + strlen (st->orig_file_name) + 1); + lp->ino = st->stat.st_ino; + lp->dev = st->stat.st_dev; + lp->nlink = st->stat.st_nlink; + strcpy (lp->name, st->orig_file_name); if (! ((link_table || (link_table = hash_initialize (0, 0, hash_link, compare_links, 0))) - && (dup = hash_insert (link_table, lp)))) + && (duplicate = hash_insert (link_table, lp)))) xalloc_die (); - if (dup != lp) + if (duplicate != lp) abort (); lp->nlink--; } @@ -1230,7 +1354,7 @@ file_count_links (struct tar_stat_info *stat) /* For each dumped file, check if all its links were dumped. Emit warnings if it is not so. */ void -check_links () +check_links (void) { struct link *lp; @@ -1242,7 +1366,7 @@ check_links () { if (lp->nlink) { - WARN ((0, 0, _("Missing links to '%s'.\n"), lp->name)); + WARN ((0, 0, _("Missing links to %s.\n"), quote (lp->name))); } } } @@ -1257,35 +1381,35 @@ check_links () /* FIXME: One should make sure that for *every* path leading to setting exit_status to failure, a clear diagnostic has been issued. */ -void -dump_file0 (struct tar_stat_info *stat, char *p, +static void +dump_file0 (struct tar_stat_info *st, char *p, int top_level, dev_t parent_device) { union block *header; char type; - time_t original_ctime; - struct utimbuf restore_times; + struct timespec original_ctime; + struct timespec restore_times[2]; off_t block_ordinal = -1; - + if (interactive_option && !confirm ("add", p)) return; - assign_string (&stat->orig_file_name, p); - assign_string (&stat->file_name, safer_name_suffix (p, false)); + assign_string (&st->orig_file_name, p); + assign_string (&st->file_name, + safer_name_suffix (p, false, absolute_names_option)); - if (deref_stat (dereference_option, p, &stat->stat) != 0) + if (deref_stat (dereference_option, p, &st->stat) != 0) { stat_diag (p); return; } - stat->archive_file_size = stat->stat.st_size; - sys_stat_nanoseconds(stat); - original_ctime = stat->stat.st_ctime; - restore_times.actime = stat->stat.st_atime; - restore_times.modtime = stat->stat.st_mtime; + st->archive_file_size = st->stat.st_size; + original_ctime = get_stat_ctime (&st->stat); + restore_times[0] = get_stat_atime (&st->stat); + restore_times[1] = get_stat_mtime (&st->stat); #ifdef S_ISHIDDEN - if (S_ISHIDDEN (stat->stat.st_mode)) + if (S_ISHIDDEN (st->stat.st_mode)) { char *new = (char *) alloca (strlen (p) + 2); if (new) @@ -1298,82 +1422,85 @@ dump_file0 (struct tar_stat_info *stat, char *p, #endif /* See if we want only new files, and check if this one is too old to - put in the archive. */ + put in the archive. - if (!S_ISDIR (stat->stat.st_mode) - && stat->stat.st_mtime < newer_mtime_option - && (!after_date_option || stat->stat.st_ctime < newer_ctime_option)) + This check is omitted if incremental_option is set *and* the + requested file is not explicitely listed in the command line. */ + + if (!(incremental_option && !is_individual_file (p)) + && !S_ISDIR (st->stat.st_mode) + && OLDER_STAT_TIME (st->stat, m) + && (!after_date_option || OLDER_STAT_TIME (st->stat, c))) { - if (0 < top_level) /* equivalent to !incremental_option */ + if (!incremental_option && verbose_option) WARN ((0, 0, _("%s: file is unchanged; not dumped"), quotearg_colon (p))); - /* FIXME: recheck this return. */ return; } /* See if we are trying to dump the archive. */ - if (sys_file_is_archive (stat)) + if (sys_file_is_archive (st)) { WARN ((0, 0, _("%s: file is the archive; not dumped"), quotearg_colon (p))); return; } - if (S_ISDIR (stat->stat.st_mode)) + if (is_avoided_name (p)) + return; + if (S_ISDIR (st->stat.st_mode)) { - dump_dir (stat, top_level, parent_device); + dump_dir (st, top_level, parent_device); if (atime_preserve_option) - utime (p, &restore_times); + utimens (p, restore_times); return; } - else if (is_avoided_name (p)) - return; else { /* Check for multiple links. */ - if (dump_hard_link (stat)) + if (dump_hard_link (st)) return; - + /* This is not a link to a previously dumped file, so dump it. */ - if (S_ISREG (stat->stat.st_mode) - || S_ISCTG (stat->stat.st_mode)) + if (S_ISREG (st->stat.st_mode) + || S_ISCTG (st->stat.st_mode)) { int fd; enum dump_status status; - if (file_dumpable_p (stat)) + if (file_dumpable_p (st)) { - fd = open (stat->orig_file_name, + 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 (stat->orig_file_name))); + quotearg_colon (st->orig_file_name))); else - open_diag (stat->orig_file_name); + open_diag (st->orig_file_name); return; } } else fd = -1; - - if (sparse_option && sparse_file_p (stat)) + + if (sparse_option && sparse_file_p (st)) { - status = sparse_dump_file (fd, stat); + status = sparse_dump_file (fd, st); if (status == dump_status_not_implemented) - status = dump_regular_file (fd, stat); + status = dump_regular_file (fd, st); } else - status = dump_regular_file (fd, stat); + status = dump_regular_file (fd, st); switch (status) { case dump_status_ok: if (multi_volume_option) assign_string (&save_name, 0); - dump_regular_finish (fd, stat, original_ctime); + dump_regular_finish (fd, st, original_ctime); break; case dump_status_short: @@ -1381,7 +1508,7 @@ dump_file0 (struct tar_stat_info *stat, char *p, assign_string (&save_name, 0); close (fd); break; - + case dump_status_fail: close (fd); return; @@ -1391,17 +1518,17 @@ dump_file0 (struct tar_stat_info *stat, char *p, } if (atime_preserve_option) - utime (stat->orig_file_name, &restore_times); - file_count_links (stat); + utimens (st->orig_file_name, restore_times); + file_count_links (st); return; } #ifdef HAVE_READLINK - else if (S_ISLNK (stat->stat.st_mode)) + else if (S_ISLNK (st->stat.st_mode)) { char *buffer; int size; - size_t linklen = stat->stat.st_size; - if (linklen != stat->stat.st_size || linklen + 1 == 0) + 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); @@ -1411,18 +1538,18 @@ dump_file0 (struct tar_stat_info *stat, char *p, return; } buffer[size] = '\0'; - assign_string (&stat->link_name, buffer); - if (size > NAME_FIELD_SIZE) - write_long_link (stat); + assign_string (&st->link_name, buffer); + if (NAME_FIELD_SIZE - (archive_format == OLDGNU_FORMAT) < size) + write_long_link (st); block_ordinal = current_block_ordinal (); - stat->stat.st_size = 0; /* force 0 size on symlink */ - header = start_header (stat); + 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 (stat, header, block_ordinal); + finish_header (st, header, block_ordinal); /* nothing more to do to it */ if (remove_files_option) @@ -1430,22 +1557,22 @@ dump_file0 (struct tar_stat_info *stat, char *p, if (unlink (p) == -1) unlink_error (p); } - file_count_links (stat); + file_count_links (st); return; } #endif - else if (S_ISCHR (stat->stat.st_mode)) + else if (S_ISCHR (st->stat.st_mode)) type = CHRTYPE; - else if (S_ISBLK (stat->stat.st_mode)) + else if (S_ISBLK (st->stat.st_mode)) type = BLKTYPE; - else if (S_ISFIFO (stat->stat.st_mode)) + else if (S_ISFIFO (st->stat.st_mode)) type = FIFOTYPE; - else if (S_ISSOCK (stat->stat.st_mode)) + else if (S_ISSOCK (st->stat.st_mode)) { WARN ((0, 0, _("%s: socket ignored"), quotearg_colon (p))); return; } - else if (S_ISDOOR (stat->stat.st_mode)) + else if (S_ISDOOR (st->stat.st_mode)) { WARN ((0, 0, _("%s: door ignored"), quotearg_colon (p))); return; @@ -1464,21 +1591,21 @@ dump_file0 (struct tar_stat_info *stat, char *p, } block_ordinal = current_block_ordinal (); - stat->stat.st_size = 0; /* force 0 size */ - header = start_header (stat); + st->stat.st_size = 0; /* force 0 size */ + header = start_header (st); if (!header) return; header->header.typeflag = type; if (type != FIFOTYPE) { - MAJOR_TO_CHARS (major (stat->stat.st_rdev), + MAJOR_TO_CHARS (major (st->stat.st_rdev), header->header.devmajor); - MINOR_TO_CHARS (minor (stat->stat.st_rdev), + MINOR_TO_CHARS (minor (st->stat.st_rdev), header->header.devminor); } - finish_header (stat, header, block_ordinal); + finish_header (st, header, block_ordinal); if (remove_files_option) { if (unlink (p) == -1) @@ -1489,8 +1616,8 @@ dump_file0 (struct tar_stat_info *stat, char *p, void dump_file (char *p, int top_level, dev_t parent_device) { - struct tar_stat_info stat; - tar_stat_init (&stat); - dump_file0 (&stat, p, top_level, parent_device); - tar_stat_destroy (&stat); + struct tar_stat_info st; + tar_stat_init (&st); + dump_file0 (&st, p, top_level, parent_device); + tar_stat_destroy (&st); }