From b7890ac7573e6df20fa843fd85400072b5638c28 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Fri, 25 Apr 1997 20:16:30 +0000 Subject: [PATCH] GNU tar 1.12 --- src/list.c | 1227 ++++++++++++++++++++++++++-------------------------- 1 file changed, 623 insertions(+), 604 deletions(-) diff --git a/src/list.c b/src/list.c index a0c65a3..b07a087 100644 --- a/src/list.c +++ b/src/list.c @@ -1,808 +1,865 @@ -/* List a tar archive. - Copyright (C) 1988, 1992, 1993 Free Software Foundation - -This file is part of GNU Tar. - -GNU Tar is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Tar is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Tar; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -/* - * List a tar archive. - * - * Also includes support routines for reading a tar archive. - * - * this version written 26 Aug 1985 by John Gilmore (ihnp4!hoptoad!gnu). - */ - -#include -#include -#include -#include -#ifndef STDC_HEADERS -extern int errno; -#endif -#include +/* List a tar archive, with support routines for reading a tar archive. + Copyright (C) 1988, 92, 93, 94, 96, 97 Free Software Foundation, Inc. + Written by John Gilmore, on 1985-08-26. -#ifdef BSD42 -#include -#else -#ifndef V7 -#include -#endif -#endif + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 2, or (at your option) any later + version. -#define isodigit(c) ( ((c) >= '0') && ((c) <= '7') ) + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General + Public License for more details. -#include "tar.h" -#include "port.h" + 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. */ -extern FILE *msg_file; +/* Define to non-zero for forcing old ctime() instead of isotime(). */ +#undef USE_OLD_CTIME -long from_oct (); /* Decode octal number */ -void demode (); /* Print file mode */ -void restore_saved_dir_info (); -PTR ck_malloc (); +#include "system.h" -union record *head; /* Points to current archive header */ -struct stat hstat; /* Stat struct corresponding */ -int head_standard; /* Tape header is in ANSI format */ +#include +#include + +#define ISODIGIT(Char) \ + ((unsigned char) (Char) >= '0' && (unsigned char) (Char) <= '7') +#define ISSPACE(Char) (ISASCII (Char) && isspace (Char)) -int check_exclude (); -void close_archive (); -void decode_header (); -int findgid (); -int finduid (); -void name_gather (); -int name_match (); -void names_notfound (); -void open_archive (); -void print_header (); -int read_header (); -void saverec (); -void skip_file (); -void skip_extended_headers (); +#include "common.h" -extern char *quote_copy_string (); +union block *current_header; /* points to current archive header */ +struct stat current_stat; /* stat struct corresponding */ +enum archive_format current_format; /* recognized format */ +/*-----------------------------------. +| Main loop for reading an archive. | +`-----------------------------------*/ -/* - * Main loop for reading an archive. - */ void -read_and (do_something) - void (*do_something) (); +read_and (void (*do_something) ()) { - int status = 3; /* Initial status at start of archive */ - int prev_status; - extern time_t new_time; - char save_linkflag; + enum read_header status = HEADER_STILL_UNREAD; + enum read_header prev_status; + char save_typeflag; - name_gather (); /* Gather all the names */ - open_archive (1); /* Open for reading */ + name_gather (); + open_archive (ACCESS_READ); - for (;;) + while (1) { prev_status = status; status = read_header (); switch (status) { + case HEADER_STILL_UNREAD: + abort (); - case 1: /* Valid header */ - /* We should decode next field (mode) first... */ - /* Ensure incoming names are null terminated. */ + case HEADER_SUCCESS: + + /* Valid header. We should decode next field (mode) first. + Ensure incoming names are null terminated. */ + + /* FIXME: This is a quick kludge before 1.12 goes out. */ + current_stat.st_mtime + = from_oct (1 + 12, current_header->header.mtime); if (!name_match (current_file_name) - || (f_new_files && hstat.st_mtime < new_time) - || (f_exclude && check_exclude (current_file_name))) + || current_stat.st_mtime < newer_mtime_option + || (exclude_option && check_exclude (current_file_name))) { - int isextended = 0; - if (head->header.linkflag == LF_VOLHDR - || head->header.linkflag == LF_MULTIVOL - || head->header.linkflag == LF_NAMES) + if (current_header->header.typeflag == GNUTYPE_VOLHDR + || current_header->header.typeflag == GNUTYPE_MULTIVOL + || current_header->header.typeflag == GNUTYPE_NAMES) { (*do_something) (); continue; } - if (f_show_omitted_dirs - && head->header.linkflag == LF_DIR) - msg ("Omitting %s\n", current_file_name); - /* Skip past it in the archive */ - if (head->header.isextended) + if (show_omitted_dirs_option + && current_header->header.typeflag == DIRTYPE) + WARN ((0, 0, _("Omitting %s"), current_file_name)); + + /* Skip past it in the archive. */ + + if (current_header->oldgnu_header.isextended) isextended = 1; - save_linkflag = head->header.linkflag; - userec (head); + save_typeflag = current_header->header.typeflag; + set_next_block_after (current_header); if (isextended) { - /* register union record *exhdr; - - for (;;) { - exhdr = findrec(); - if (!exhdr->ext_hdr.isextended) { - userec(exhdr); - break; - } - } - userec(exhdr);*/ +#if 0 + union block *exhdr; + + while (1) + { + exhdr = find_next_block (); + if (!exhdr->sparse_header.isextended) + { + set_next_block_after (exhdr); + break; + } + } + set_next_block_after (exhdr); +#endif skip_extended_headers (); } - /* Skip to the next header on the archive */ - if (save_linkflag != LF_DIR) - skip_file ((long) hstat.st_size); - continue; + /* Skip to the next header on the archive. */ + + if (save_typeflag != DIRTYPE) + skip_file ((long) current_stat.st_size); + continue; } (*do_something) (); continue; - /* - * If the previous header was good, tell them - * that we are skipping bad ones. - */ - case 0: /* Invalid header */ - userec (head); + case HEADER_ZERO_BLOCK: + if (block_number_option) + fprintf (stdlis, _("block %10ld: ** Block of NULs **\n"), + current_block_ordinal ()); + + set_next_block_after (current_header); + status = prev_status; + if (ignore_zeros_option) + continue; + break; + + case HEADER_END_OF_FILE: + if (block_number_option) + fprintf (stdlis, _("block %10ld: ** End of File **\n"), + current_block_ordinal ()); + break; + + case HEADER_FAILURE: + /* If the previous header was good, tell them that we are + skipping bad ones. */ + set_next_block_after (current_header); switch (prev_status) { - case 3: /* Error on first record */ - msg ("Hmm, this doesn't look like a tar archive."); - /* FALL THRU */ - case 2: /* Error after record of zeroes */ - case 1: /* Error after header rec */ - msg ("Skipping to next file header..."); - case 0: /* Error after error */ + case HEADER_STILL_UNREAD: + WARN ((0, 0, _("Hmm, this doesn't look like a tar archive"))); + /* Fall through. */ + + case HEADER_ZERO_BLOCK: + case HEADER_SUCCESS: + WARN ((0, 0, _("Skipping to next file header"))); + break; + + case HEADER_END_OF_FILE: + case HEADER_FAILURE: + /* We are in the middle of a cascade of errors. */ break; } continue; - - case 2: /* Record of zeroes */ - userec (head); - status = prev_status; /* If error after 0's */ - if (f_ignorez) - continue; - /* FALL THRU */ - case EOF: /* End of archive */ - break; } break; - }; + } - restore_saved_dir_info (); + apply_delayed_set_stat (); close_archive (); - names_notfound (); /* Print names not found */ + names_notfound (); /* print names not found */ } +/*---------------------------------------------. +| Print a header block, based on tar options. | +`---------------------------------------------*/ -/* - * Print a header record, based on tar options. - */ void -list_archive () +list_archive (void) { - extern char *save_name; - int isextended = 0; /* Flag to remember if head is extended */ + int isextended = 0; /* to remember if current_header is extended */ - /* Save the record */ - saverec (&head); + /* Print the header block. */ - /* Print the header record */ - if (f_verbose) + if (verbose_option) { - if (f_verbose > 1) - decode_header (head, &hstat, &head_standard, 0); + if (verbose_option > 1) + decode_header (current_header, ¤t_stat, ¤t_format, 0); print_header (); } - if (f_gnudump && head->header.linkflag == LF_DUMPDIR) + if (incremental_option && current_header->header.typeflag == GNUTYPE_DUMPDIR) { size_t size, written, check; - char *data; - extern long save_totsize; - extern long save_sizeleft; + union block *data_block; - userec (head); - if (f_multivol) + set_next_block_after (current_header); + if (multi_volume_option) { - save_name = current_file_name; - save_totsize = hstat.st_size; + assign_string (&save_name, current_file_name); + save_totsize = current_stat.st_size; } - for (size = hstat.st_size; size > 0; size -= written) + for (size = current_stat.st_size; size > 0; size -= written) { - if (f_multivol) + if (multi_volume_option) save_sizeleft = size; - data = findrec ()->charptr; - if (data == NULL) + data_block = find_next_block (); + if (!data_block) { - msg ("EOF in archive file?"); - break; + ERROR ((0, 0, _("EOF in archive file"))); + break; /* FIXME: What happens, then? */ } - written = endofrecs ()->charptr - data; + written = available_space_after (data_block); if (written > size) written = size; - errno = 0; - check = fwrite (data, sizeof (char), written, msg_file); - userec ((union record *) (data + written - 1)); + errno = 0; /* FIXME: errno should be read-only */ + check = fwrite (data_block->buffer, sizeof (char), written, stdlis); + set_next_block_after ((union block *) + (data_block->buffer + written - 1)); if (check != written) { - msg_perror ("only wrote %ld of %ld bytes to file %s", check, written, current_file_name); - skip_file ((long) (size) - written); + ERROR ((0, errno, _("Only wrote %ld of %ld bytes to file %s"), + check, written, current_file_name)); + skip_file ((long) (size - written)); break; } } - if (f_multivol) - save_name = 0; - saverec ((union record **) 0); /* Unsave it */ - fputc ('\n', msg_file); - fflush (msg_file); + if (multi_volume_option) + assign_string (&save_name, NULL); + fputc ('\n', stdlis); + fflush (stdlis); return; } - saverec ((union record **) 0);/* Unsave it */ - /* Check to see if we have an extended header to skip over also */ - if (head->header.isextended) + + /* Check to see if we have an extended header to skip over also. */ + + if (current_header->oldgnu_header.isextended) isextended = 1; - /* Skip past the header in the archive */ - userec (head); + /* Skip past the header in the archive. */ + + set_next_block_after (current_header); + + /* If we needed to skip any extended headers, do so now, by reading + extended headers and skipping past them in the archive. */ - /* - * If we needed to skip any extended headers, do so now, by - * reading extended headers and skipping past them in the - * archive. - */ if (isextended) { - /* register union record *exhdr; +#if 0 + union block *exhdr; - for (;;) { - exhdr = findrec(); + while (1) + { + exhdr = find_next_block (); - if (!exhdr->ext_hdr.isextended) { - userec(exhdr); - break; - } - userec(exhdr); - }*/ + if (!exhdr->sparse_header.isextended) + { + set_next_block_after (exhdr); + break; + } + set_next_block_after (exhdr); + } +#endif skip_extended_headers (); } - if (f_multivol) - save_name = current_file_name; - /* Skip to the next header on the archive */ + if (multi_volume_option) + assign_string (&save_name, current_file_name); - skip_file ((long) hstat.st_size); + /* Skip to the next header on the archive. */ - if (f_multivol) - save_name = 0; -} + skip_file ((long) current_stat.st_size); + if (multi_volume_option) + assign_string (&save_name, NULL); +} -/* - * Read a record that's supposed to be a header record. - * Return its address in "head", and if it is good, the file's - * size in hstat.st_size. - * - * Return 1 for success, 0 if the checksum is bad, EOF on eof, - * 2 for a record full of zeros (EOF marker). - * - * You must always userec(head) to skip past the header which this - * routine reads. - */ -int -read_header () +/*-----------------------------------------------------------------------. +| Read a block that's supposed to be a header block. Return its address | +| in "current_header", and if it is good, the file's size in | +| current_stat.st_size. | +| | +| Return 1 for success, 0 if the checksum is bad, EOF on eof, 2 for a | +| block full of zeros (EOF marker). | +| | +| You must always set_next_block_after(current_header) to skip past the | +| header which this routine reads. | +`-----------------------------------------------------------------------*/ + +/* The standard BSD tar sources create the checksum by adding up the + bytes in the header as type char. I think the type char was unsigned + on the PDP-11, but it's signed on the Next and Sun. It looks like the + sources to BSD tar were never changed to compute the checksum + currectly, so both the Sun and Next add the bytes of the header as + signed chars. This doesn't cause a problem until you get a file with + a name containing characters with the high bit set. So read_header + computes two checksums -- signed and unsigned. */ + +/* FIXME: The signed checksum computation is broken on machines where char's + are unsigned. It's uneasy to handle all cases correctly... */ + +enum read_header +read_header (void) { - register int i; - register long sum, signed_sum, recsum; - register char *p; - register union record *header; - long from_oct (); + int i; + long unsigned_sum; /* the POSIX one :-) */ + long signed_sum; /* the Sun one :-( */ + long recorded_sum; + char *p; + union block *header; char **longp; - char *bp, *data; + char *bp; + union block *data_block; int size, written; static char *next_long_name, *next_long_link; - char *name; -recurse: + while (1) + { + header = find_next_block (); + current_header = header; + if (!header) + return HEADER_END_OF_FILE; + + recorded_sum + = from_oct (sizeof header->header.chksum, header->header.chksum); + + unsigned_sum = 0; + signed_sum = 0; + p = header->buffer; + for (i = sizeof (*header); --i >= 0;) + { + /* We can't use unsigned char here because of old compilers, + e.g. V7. */ - header = findrec (); - head = header; /* This is our current header */ - if (NULL == header) - return EOF; + unsigned_sum += 0xFF & *p; + signed_sum += *p++; + } - recsum = from_oct (8, header->header.chksum); + /* Adjust checksum to count the "chksum" field as blanks. */ - sum = 0; - p = header->charptr; - for (i = sizeof (*header); --i >= 0;) - { - /* - * We can't use unsigned char here because of old compilers, - * e.g. V7. - */ - signed_sum += *p; - sum += 0xFF & *p++; - } + for (i = sizeof (header->header.chksum); --i >= 0;) + { + unsigned_sum -= 0xFF & header->header.chksum[i]; + signed_sum -= header->header.chksum[i]; + } + unsigned_sum += ' ' * sizeof header->header.chksum; + signed_sum += ' ' * sizeof header->header.chksum; - /* Adjust checksum to count the "chksum" field as blanks. */ - for (i = sizeof (header->header.chksum); --i >= 0;) - { - sum -= 0xFF & header->header.chksum[i]; - signed_sum -= (char) header->header.chksum[i]; - } - sum += ' ' * sizeof header->header.chksum; - signed_sum += ' ' * sizeof header->header.chksum; + if (unsigned_sum == sizeof header->header.chksum * ' ') + { + /* This is a zeroed block...whole block is 0's except for the + blanks we faked for the checksum field. */ - if (sum == 8 * ' ') - { - /* - * This is a zeroed record...whole record is 0's except - * for the 8 blanks we faked for the checksum field. - */ - return 2; - } + return HEADER_ZERO_BLOCK; + } - if (sum != recsum && signed_sum != recsum) - return 0; + if (unsigned_sum != recorded_sum && signed_sum != recorded_sum) + return HEADER_FAILURE; - /* - * Good record. Decode file size and return. - */ - if (header->header.linkflag == LF_LINK) - hstat.st_size = 0; /* Links 0 size on tape */ - else - hstat.st_size = from_oct (1 + 12, header->header.size); + /* Good block. Decode file size and return. */ - header->header.arch_name[NAMSIZ - 1] = '\0'; - if (header->header.linkflag == LF_LONGNAME - || header->header.linkflag == LF_LONGLINK) - { - longp = ((header->header.linkflag == LF_LONGNAME) - ? &next_long_name - : &next_long_link); - - userec (header); - if (*longp) - free (*longp); - bp = *longp = (char *) ck_malloc (hstat.st_size); - - for (size = hstat.st_size; - size > 0; - size -= written) + if (header->header.typeflag == LNKTYPE) + current_stat.st_size = 0; /* links 0 size on tape */ + else + current_stat.st_size = from_oct (1 + 12, header->header.size); + + header->header.name[NAME_FIELD_SIZE - 1] = '\0'; + if (header->header.typeflag == GNUTYPE_LONGNAME + || header->header.typeflag == GNUTYPE_LONGLINK) { - data = findrec ()->charptr; - if (data == NULL) + longp = ((header->header.typeflag == GNUTYPE_LONGNAME) + ? &next_long_name + : &next_long_link); + + set_next_block_after (header); + if (*longp) + free (*longp); + bp = *longp = (char *) xmalloc ((size_t) current_stat.st_size); + + for (size = current_stat.st_size; size > 0; size -= written) { - msg ("Unexpected EOF on archive file"); - break; + data_block = find_next_block (); + if (data_block == NULL) + { + ERROR ((0, 0, _("Unexpected EOF on archive file"))); + break; + } + written = available_space_after (data_block); + if (written > size) + written = size; + + memcpy (bp, data_block->buffer, (size_t) written); + bp += written; + set_next_block_after ((union block *) + (data_block->buffer + written - 1)); } - written = endofrecs ()->charptr - data; - if (written > size) - written = size; - bcopy (data, bp, written); - bp += written; - userec ((union record *) (data + written - 1)); + /* Loop! */ + + } + else + { + assign_string (¤t_file_name, + (next_long_name ? next_long_name + : current_header->header.name)); + assign_string (¤t_link_name, + (next_long_link ? next_long_link + : current_header->header.linkname)); + next_long_link = next_long_name = 0; + return HEADER_SUCCESS; } - goto recurse; - } - else - { - name = (next_long_name - ? next_long_name - : head->header.arch_name); - if (current_file_name) - free (current_file_name); - current_file_name = ck_malloc (strlen (name) + 1); - strcpy (current_file_name, name); - - name = (next_long_link - ? next_long_link - : head->header.arch_linkname); - if (current_link_name) - free (current_link_name); - current_link_name = ck_malloc (strlen (name) + 1); - strcpy (current_link_name, name); - - next_long_link = next_long_name = 0; - return 1; } } +/*-------------------------------------------------------------------------. +| Decode things from a file HEADER block into STAT_INFO, also setting | +| *FORMAT_POINTER depending on the header block format. If DO_USER_GROUP, | +| decode the user/group information (this is useful for extraction, but | +| waste time when merely listing). | +| | +| read_header() has already decoded the checksum and length, so we don't. | +| | +| This routine should *not* be called twice for the same block, since the | +| two calls might use different DO_USER_GROUP values and thus might end up | +| with different uid/gid for the two calls. If anybody wants the uid/gid | +| they should decode it first, and other callers should decode it without | +| uid/gid before calling a routine, e.g. print_header, that assumes | +| decoded data. | +`-------------------------------------------------------------------------*/ -/* - * Decode things from a file header record into a "struct stat". - * Also set "*stdp" to !=0 or ==0 depending whether header record is "Unix - * Standard" tar format or regular old tar format. - * - * read_header() has already decoded the checksum and length, so we don't. - * - * If wantug != 0, we want the uid/group info decoded from Unix Standard - * tapes (for extraction). If == 0, we are just printing anyway, so save time. - * - * decode_header should NOT be called twice for the same record, since the - * two calls might use different "wantug" values and thus might end up with - * different uid/gid for the two calls. If anybody wants the uid/gid they - * should decode it first, and other callers should decode it without uid/gid - * before calling a routine, e.g. print_header, that assumes decoded data. - */ void -decode_header (header, st, stdp, wantug) - register union record *header; - register struct stat *st; - int *stdp; - int wantug; +decode_header (union block *header, struct stat *stat_info, + enum archive_format *format_pointer, int do_user_group) { - long from_oct (); + enum archive_format format; + + if (strcmp (header->header.magic, TMAGIC) == 0) + format = POSIX_FORMAT; + else if (strcmp (header->header.magic, OLDGNU_MAGIC) == 0) + format = OLDGNU_FORMAT; + else + format = V7_FORMAT; + *format_pointer = format; + + stat_info->st_mode = from_oct (8, header->header.mode); + stat_info->st_mode &= 07777; + stat_info->st_mtime = from_oct (1 + 12, header->header.mtime); - st->st_mode = from_oct (8, header->header.mode); - st->st_mode &= 07777; - st->st_mtime = from_oct (1 + 12, header->header.mtime); - if (f_gnudump) + if (format == OLDGNU_FORMAT && incremental_option) { - st->st_atime = from_oct (1 + 12, header->header.atime); - st->st_ctime = from_oct (1 + 12, header->header.ctime); + stat_info->st_atime = from_oct (1 + 12, header->oldgnu_header.atime); + stat_info->st_ctime = from_oct (1 + 12, header->oldgnu_header.ctime); } - if (0 == strcmp (header->header.magic, TMAGIC)) + if (format == V7_FORMAT) + { + stat_info->st_uid = from_oct (8, header->header.uid); + stat_info->st_gid = from_oct (8, header->header.gid); + stat_info->st_rdev = 0; + } + else { - /* Unix Standard tar archive */ - *stdp = 1; - if (wantug) + if (do_user_group) { -#ifdef NONAMES - st->st_uid = from_oct (8, header->header.uid); - st->st_gid = from_oct (8, header->header.gid); -#else - st->st_uid = - (*header->header.uname - ? finduid (header->header.uname) - : from_oct (8, header->header.uid)); - st->st_gid = - (*header->header.gname - ? findgid (header->header.gname) - : from_oct (8, header->header.gid)); -#endif + /* FIXME: Decide if this should somewhat depend on -p. */ + + if (numeric_owner_option + || !*header->header.uname + || !uname_to_uid (header->header.uname, &stat_info->st_uid)) + stat_info->st_uid = from_oct (8, header->header.uid); + + if (numeric_owner_option + || !*header->header.gname + || !gname_to_gid (header->header.gname, &stat_info->st_gid)) + stat_info->st_gid = from_oct (8, header->header.gid); } -#if defined(S_IFBLK) || defined(S_IFCHR) - switch (header->header.linkflag) + switch (header->header.typeflag) { - case LF_BLK: - case LF_CHR: - st->st_rdev = makedev (from_oct (8, header->header.devmajor), - from_oct (8, header->header.devminor)); - } +#ifdef S_IFBLK + case BLKTYPE: + stat_info->st_rdev = makedev (from_oct (8, header->header.devmajor), + from_oct (8, header->header.devminor)); + break; #endif - } - else - { - /* Old fashioned tar archive */ - *stdp = 0; - st->st_uid = from_oct (8, header->header.uid); - st->st_gid = from_oct (8, header->header.gid); - st->st_rdev = 0; + +#ifdef S_IFCHR + case CHRTYPE: + stat_info->st_rdev = makedev (from_oct (8, header->header.devmajor), + from_oct (8, header->header.devminor)); + break; +#endif + + default: + stat_info->st_rdev = 0; + } } } +/*------------------------------------------------------------------------. +| Quick and dirty octal conversion. Result is -1 if the field is invalid | +| (all blank, or nonoctal). | +`------------------------------------------------------------------------*/ -/* - * Quick and dirty octal conversion. - * - * Result is -1 if the field is invalid (all blank, or nonoctal). - */ long -from_oct (digs, where) - register int digs; - register char *where; +from_oct (int digs, char *where) { - register long value; + long value; - while (isspace (*where)) - { /* Skip spaces */ + while (ISSPACE (*where)) + { /* skip spaces */ where++; if (--digs <= 0) - return -1; /* All blank field */ + return -1; /* all blank field */ } value = 0; - while (digs > 0 && isodigit (*where)) - { /* Scan til nonoctal */ + while (digs > 0 && ISODIGIT (*where)) + { + /* Scan til nonoctal. */ + value = (value << 3) | (*where++ - '0'); --digs; } - if (digs > 0 && *where && !isspace (*where)) - return -1; /* Ended on non-space/nul */ + if (digs > 0 && *where && !ISSPACE (*where)) + return -1; /* ended on non-space/nul */ return value; } +#if !USE_OLD_CTIME -/* - * Actually print it. - * - * Plain and fancy file header block logging. - * Non-verbose just prints the name, e.g. for "tar t" or "tar x". - * This should just contain file names, so it can be fed back into tar - * with xargs or the "-T" option. The verbose option can give a bunch - * of info, one line per file. I doubt anybody tries to parse its - * format, or if they do, they shouldn't. Unix tar is pretty random here - * anyway. - * - * Note that print_header uses the globals , , and - * , which must be set up in advance. This is not very clean - * and should be cleaned up. FIXME. - */ -#define UGSWIDTH 18 /* min width of User, group, size */ -/* UGSWIDTH of 18 means that with user and group names <= 8 chars the columns - never shift during the listing. */ -#define DATEWIDTH 19 /* Last mod date */ -static int ugswidth = UGSWIDTH; /* Max width encountered so far */ +/*-------------------------------------------. +| Return the time formatted along ISO 8601. | +`-------------------------------------------*/ + +/* Also, see http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html. */ + +static char * +isotime (const time_t *time) +{ + static char buffer[21]; + struct tm *tm; + + tm = localtime (time); + sprintf (buffer, "%4d-%02d-%02d %02d:%02d:%02d\n", + tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + return buffer; +} + +#endif /* not USE_OLD_CTIME */ + +/*-------------------------------------------------------------------------. +| Decode MODE from its binary form in a stat structure, and encode it into | +| a 9 characters string STRING, terminated with a NUL. | +`-------------------------------------------------------------------------*/ + +static void +decode_mode (unsigned mode, char *string) +{ + unsigned mask; + const char *rwx = "rwxrwxrwx"; + + for (mask = 0400; mask != 0; mask >>= 1) + if (mode & mask) + *string++ = *rwx++; + else + { + *string++ = '-'; + rwx++; + } + + if (mode & S_ISUID) + string[-7] = string[-7] == 'x' ? 's' : 'S'; + if (mode & S_ISGID) + string[-4] = string[-4] == 'x' ? 's' : 'S'; + if (mode & S_ISVTX) + string[-1] = string[-1] == 'x' ? 't' : 'T'; + + *string = '\0'; +} + +/*-------------------------------------------------------------------------. +| Actually print it. | +| | +| Plain and fancy file header block logging. Non-verbose just prints the | +| name, e.g. for "tar t" or "tar x". This should just contain file names, | +| so it can be fed back into tar with xargs or the "-T" option. The | +| verbose option can give a bunch of info, one line per file. I doubt | +| anybody tries to parse its format, or if they do, they shouldn't. Unix | +| tar is pretty random here anyway. | +`-------------------------------------------------------------------------*/ + +/* FIXME: Note that print_header uses the globals HEAD, HSTAT, and + HEAD_STANDARD, which must be set up in advance. Not very clean... */ + +/* UGSWIDTH starts with 18, so with user and group names <= 8 chars, the + columns never shift during the listing. */ +#define UGSWIDTH 18 +static int ugswidth = UGSWIDTH; /* maximum width encountered so far */ + +/* DATEWIDTH is the number of columns taken by the date and time fields. */ +#if USE_OLD_CDATE +# define DATEWIDTH 19 +#else +# define DATEWIDTH 18 +#endif void -print_header () +print_header (void) { char modes[11]; char *timestamp; - char uform[11], gform[11]; /* These hold formatted ints */ + char uform[11], gform[11]; /* these hold formatted ints */ char *user, *group; - char size[24]; /* Holds a formatted long or maj, min */ - time_t longie; /* To make ctime() call portable */ + char size[24]; /* holds a formatted long or maj, min */ + time_t longie; /* to make ctime() call portable */ int pad; char *name; - extern long baserec; - if (f_sayblock) - fprintf (msg_file, "rec %10d: ", baserec + (ar_record - ar_block)); - /* annofile(msg_file, (char *)NULL); */ + if (block_number_option) + fprintf (stdlis, _("block %10ld: "), current_block_ordinal ()); - if (f_verbose <= 1) + if (verbose_option <= 1) { - /* Just the fax, mam. */ - char *name; + /* Just the fax, mam. */ - name = quote_copy_string (current_file_name); - if (name == 0) - name = current_file_name; - fprintf (msg_file, "%s\n", name); - if (name != current_file_name) - free (name); + char *quoted_name = quote_copy_string (current_file_name); + + if (quoted_name) + { + fprintf (stdlis, "%s\n", quoted_name); + free (quoted_name); + } + else + fprintf (stdlis, "%s\n", current_file_name); } else { - /* File type and modes */ + /* File type and modes. */ + modes[0] = '?'; - switch (head->header.linkflag) + switch (current_header->header.typeflag) { - case LF_VOLHDR: + case GNUTYPE_VOLHDR: modes[0] = 'V'; break; - case LF_MULTIVOL: + case GNUTYPE_MULTIVOL: modes[0] = 'M'; break; - case LF_NAMES: + case GNUTYPE_NAMES: modes[0] = 'N'; break; - case LF_LONGNAME: - case LF_LONGLINK: - msg ("Visible longname error\n"); + case GNUTYPE_LONGNAME: + case GNUTYPE_LONGLINK: + ERROR ((0, 0, _("Visible longname error"))); break; - case LF_SPARSE: - case LF_NORMAL: - case LF_OLDNORMAL: - case LF_LINK: + case GNUTYPE_SPARSE: + case REGTYPE: + case AREGTYPE: + case LNKTYPE: modes[0] = '-'; - if ('/' == current_file_name[strlen (current_file_name) - 1]) + if (current_file_name[strlen (current_file_name) - 1] == '/') modes[0] = 'd'; break; - case LF_DUMPDIR: + case GNUTYPE_DUMPDIR: modes[0] = 'd'; break; - case LF_DIR: + case DIRTYPE: modes[0] = 'd'; break; - case LF_SYMLINK: + case SYMTYPE: modes[0] = 'l'; break; - case LF_BLK: + case BLKTYPE: modes[0] = 'b'; break; - case LF_CHR: + case CHRTYPE: modes[0] = 'c'; break; - case LF_FIFO: + case FIFOTYPE: modes[0] = 'p'; break; - case LF_CONTIG: + case CONTTYPE: modes[0] = 'C'; break; } - demode ((unsigned) hstat.st_mode, modes + 1); + decode_mode ((unsigned) current_stat.st_mode, modes + 1); + + /* Timestamp. */ - /* Timestamp */ - longie = hstat.st_mtime; + longie = current_stat.st_mtime; +#if USE_OLD_CTIME timestamp = ctime (&longie); timestamp[16] = '\0'; timestamp[24] = '\0'; +#else + timestamp = isotime (&longie); + timestamp[16] = '\0'; +#endif - /* User and group names */ - if (*head->header.uname && head_standard) - { - user = head->header.uname; - } + /* User and group names. */ + + if (*current_header->header.uname && current_format != V7_FORMAT) + user = current_header->header.uname; else { user = uform; - (void) sprintf (uform, "%d", - from_oct (8, head->header.uid)); - } - if (*head->header.gname && head_standard) - { - group = head->header.gname; + sprintf (uform, "%ld", from_oct (8, current_header->header.uid)); } + + if (*current_header->header.gname && current_format != V7_FORMAT) + group = current_header->header.gname; else { group = gform; - (void) sprintf (gform, "%d", - from_oct (8, head->header.gid)); + sprintf (gform, "%ld", from_oct (8, current_header->header.gid)); } - /* Format the file size or major/minor device numbers */ - switch (head->header.linkflag) + /* Format the file size or major/minor device numbers. */ + + switch (current_header->header.typeflag) { #if defined(S_IFBLK) || defined(S_IFCHR) - case LF_CHR: - case LF_BLK: - (void) sprintf (size, "%d,%d", - major (hstat.st_rdev), - minor (hstat.st_rdev)); + case CHRTYPE: + case BLKTYPE: + sprintf (size, "%d,%d", + major (current_stat.st_rdev), minor (current_stat.st_rdev)); break; #endif - case LF_SPARSE: - (void) sprintf (size, "%ld", - from_oct (1 + 12, head->header.realsize)); + case GNUTYPE_SPARSE: + sprintf (size, "%ld", + from_oct (1 + 12, current_header->oldgnu_header.realsize)); break; default: - (void) sprintf (size, "%ld", (long) hstat.st_size); + sprintf (size, "%ld", (long) current_stat.st_size); } - /* Figure out padding and print the whole line. */ + /* Figure out padding and print the whole line. */ + pad = strlen (user) + strlen (group) + strlen (size) + 1; if (pad > ugswidth) ugswidth = pad; +#if USE_OLD_CTIME + fprintf (stdlis, "%s %s/%s %*s%s %s %s", + modes, user, group, ugswidth - pad, "", + size, timestamp + 4, timestamp + 20); +#else + fprintf (stdlis, "%s %s/%s %*s%s %s", + modes, user, group, ugswidth - pad, "", size, timestamp); +#endif + name = quote_copy_string (current_file_name); - if (!name) - name = current_file_name; - fprintf (msg_file, "%s %s/%s %*s%s %s %s %s", - modes, - user, - group, - ugswidth - pad, - "", - size, - timestamp + 4, timestamp + 20, - name); - - if (name != current_file_name) - free (name); - switch (head->header.linkflag) + if (name) + { + fprintf (stdlis, " %s", name); + free (name); + } + else + fprintf (stdlis, " %s", current_file_name); + + switch (current_header->header.typeflag) { - case LF_SYMLINK: + case SYMTYPE: name = quote_copy_string (current_link_name); - if (!name) - name = current_link_name; - fprintf (msg_file, " -> %s\n", name); - if (name != current_link_name) - free (name); + if (name) + { + fprintf (stdlis, " -> %s\n", name); + free (name); + } + else + fprintf (stdlis, " -> %s\n", current_link_name); break; - case LF_LINK: + case LNKTYPE: name = quote_copy_string (current_link_name); - if (!name) - name = current_link_name; - fprintf (msg_file, " link to %s\n", current_link_name); - if (name != current_link_name) - free (name); + if (name) + { + fprintf (stdlis, _(" link to %s\n"), name); + free (name); + } + else + fprintf (stdlis, _(" link to %s\n"), current_link_name); break; default: - fprintf (msg_file, " unknown file type '%c'\n", - head->header.linkflag); + fprintf (stdlis, _(" unknown file type `%c'\n"), + current_header->header.typeflag); break; - case LF_OLDNORMAL: - case LF_NORMAL: - case LF_SPARSE: - case LF_CHR: - case LF_BLK: - case LF_DIR: - case LF_FIFO: - case LF_CONTIG: - case LF_DUMPDIR: - putc ('\n', msg_file); + case AREGTYPE: + case REGTYPE: + case GNUTYPE_SPARSE: + case CHRTYPE: + case BLKTYPE: + case DIRTYPE: + case FIFOTYPE: + case CONTTYPE: + case GNUTYPE_DUMPDIR: + putc ('\n', stdlis); break; - case LF_VOLHDR: - fprintf (msg_file, "--Volume Header--\n"); + case GNUTYPE_VOLHDR: + fprintf (stdlis, _("--Volume Header--\n")); break; - case LF_MULTIVOL: - fprintf (msg_file, "--Continued at byte %ld--\n", from_oct (1 + 12, head->header.offset)); + case GNUTYPE_MULTIVOL: + fprintf (stdlis, _("--Continued at byte %ld--\n"), + from_oct (1 + 12, current_header->oldgnu_header.offset)); break; - case LF_NAMES: - fprintf (msg_file, "--Mangled file names--\n"); + case GNUTYPE_NAMES: + fprintf (stdlis, _("--Mangled file names--\n")); break; } } - fflush (msg_file); + fflush (stdlis); } -/* - * Print a similar line when we make a directory automatically. - */ +/*--------------------------------------------------------------. +| Print a similar line when we make a directory automatically. | +`--------------------------------------------------------------*/ + void -pr_mkdir (pathname, length, mode) - char *pathname; - int length; - int mode; +print_for_mkdir (char *pathname, int length, int mode) { char modes[11]; char *name; - extern long baserec; - if (f_verbose > 1) + if (verbose_option > 1) { - /* File type and modes */ + /* File type and modes. */ + modes[0] = 'd'; - demode ((unsigned) mode, modes + 1); + decode_mode ((unsigned) mode, modes + 1); - if (f_sayblock) - fprintf (msg_file, "rec %10d: ", baserec + (ar_record - ar_block)); - /* annofile(msg_file, (char *)NULL); */ + if (block_number_option) + fprintf (stdlis, _("block %10ld: "), current_block_ordinal ()); name = quote_copy_string (pathname); - if (!name) - name = pathname; - fprintf (msg_file, "%s %*s %.*s\n", - modes, - ugswidth + DATEWIDTH, - "Creating directory:", - length, - pathname); - if (name != pathname) - free (name); + if (name) + { + fprintf (stdlis, "%s %*s %.*s\n", modes, ugswidth + DATEWIDTH, + _("Creating directory:"), length, name); + free (name); + } + else + fprintf (stdlis, "%s %*s %.*s\n", modes, ugswidth + DATEWIDTH, + _("Creating directory:"), length, pathname); } } +/*--------------------------------------------------------. +| Skip over SIZE bytes of data in blocks in the archive. | +`--------------------------------------------------------*/ -/* - * Skip over bytes of data in records in the archive. - */ void -skip_file (size) - register long size; +skip_file (long size) { - union record *x; - extern long save_totsize; - extern long save_sizeleft; + union block *x; - if (f_multivol) + if (multi_volume_option) { save_totsize = size; save_sizeleft = size; @@ -810,72 +867,34 @@ skip_file (size) while (size > 0) { - x = findrec (); + x = find_next_block (); if (x == NULL) - { /* Check it... */ - msg ("Unexpected EOF on archive file"); - exit (EX_BADARCH); - } - userec (x); - size -= RECORDSIZE; - if (f_multivol) - save_sizeleft -= RECORDSIZE; - } -} - -void -skip_extended_headers () -{ - register union record *exhdr; + FATAL_ERROR ((0, 0, _("Unexpected EOF on archive file"))); - for (;;) - { - exhdr = findrec (); - if (!exhdr->ext_hdr.isextended) - { - userec (exhdr); - break; - } - userec (exhdr); + set_next_block_after (x); + size -= BLOCKSIZE; + if (multi_volume_option) + save_sizeleft -= BLOCKSIZE; } } -/* - * Decode the mode string from a stat entry into a 9-char string and a null. - */ +/*---. +| ? | +`---*/ + void -demode (mode, string) - register unsigned mode; - register char *string; +skip_extended_headers (void) { - register unsigned mask; - register char *rwx = "rwxrwxrwx"; + union block *exhdr; - for (mask = 0400; mask != 0; mask >>= 1) + while (1) { - if (mode & mask) - *string++ = *rwx++; - else + exhdr = find_next_block (); + if (!exhdr->sparse_header.isextended) { - *string++ = '-'; - rwx++; + set_next_block_after (exhdr); + break; } + set_next_block_after (exhdr); } - - if (mode & S_ISUID) - if (string[-7] == 'x') - string[-7] = 's'; - else - string[-7] = 'S'; - if (mode & S_ISGID) - if (string[-4] == 'x') - string[-4] = 's'; - else - string[-4] = 'S'; - if (mode & S_ISVTX) - if (string[-1] == 'x') - string[-1] = 't'; - else - string[-1] = 'T'; - *string = '\0'; } -- 2.45.2