X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Ftar;a=blobdiff_plain;f=src%2Flist.c;h=d46be651cb3752b0f1fe2d0fc29d79a8a256feb3;hp=9184beab739f70631c371a517b0c119af001e781;hb=45ccda119355a1087450039a250359c1d0de0d08;hpb=ab6dd4948d1736b97a343d3c183f2dedad7421bb diff --git a/src/list.c b/src/list.c index 9184bea..d46be65 100644 --- a/src/list.c +++ b/src/list.c @@ -1,23 +1,24 @@ /* List a tar archive, with support routines for reading a tar archive. - Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, - 2001, 2003, 2004, 2005, 2006, 2007, 2010 Free Software Foundation, Inc. + Copyright 1988, 1992-1994, 1996-2001, 2003-2007, 2010, 2012-2014 Free + Software Foundation, Inc. - Written by John Gilmore, on 1985-08-26. + This file is part of GNU tar. - This program is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by the - Free Software Foundation; either version 3, or (at your option) any later - version. + GNU tar is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. - This program is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General - Public License for more details. + GNU tar is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. - You should have received a copy of the GNU General Public License along - with this program; if not, write to the Free Software Foundation, Inc., - 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + You should have received a copy of the GNU General Public License + along with this program. If not, see . + + Written by John Gilmore, on 1985-08-26. */ #include #include @@ -25,18 +26,30 @@ #include "common.h" -#define max(a, b) ((a) < (b) ? (b) : (a)) - union block *current_header; /* points to current archive header */ enum archive_format current_format; /* recognized format */ union block *recent_long_name; /* recent long name header and contents */ union block *recent_long_link; /* likewise, for long link */ size_t recent_long_name_blocks; /* number of blocks in recent_long_name */ size_t recent_long_link_blocks; /* likewise, for long link */ -union block *recent_global_header; /* Recent global header block */ - -static uintmax_t from_header (const char *, size_t, const char *, - uintmax_t, uintmax_t, bool, bool); +static union block *recent_global_header; /* Recent global header block */ + +#define GID_FROM_HEADER(where) gid_from_header (where, sizeof (where)) +#define MAJOR_FROM_HEADER(where) major_from_header (where, sizeof (where)) +#define MINOR_FROM_HEADER(where) minor_from_header (where, sizeof (where)) +#define MODE_FROM_HEADER(where, hbits) \ + mode_from_header (where, sizeof (where), hbits) +#define TIME_FROM_HEADER(where) time_from_header (where, sizeof (where)) +#define UID_FROM_HEADER(where) uid_from_header (where, sizeof (where)) + +static gid_t gid_from_header (const char *buf, size_t size); +static major_t major_from_header (const char *buf, size_t size); +static minor_t minor_from_header (const char *buf, size_t size); +static mode_t mode_from_header (const char *buf, size_t size, bool *hbits); +static time_t time_from_header (const char *buf, size_t size); +static uid_t uid_from_header (const char *buf, size_t size); +static intmax_t from_header (const char *, size_t, const char *, + intmax_t, uintmax_t, bool, bool); /* Base 64 digits; see Internet RFC 2045 Table 1. */ static char const base_64_digits[64] = @@ -61,6 +74,93 @@ base64_init (void) base64_map[(int) base_64_digits[i]] = i; } +static char * +decode_xform (char *file_name, void *data) +{ + int type = *(int*)data; + + switch (type) + { + case XFORM_SYMLINK: + /* FIXME: It is not quite clear how and to which extent are the symbolic + links subject to filename transformation. In the absence of another + solution, symbolic links are exempt from component stripping and + name suffix normalization, but subject to filename transformation + proper. */ + return file_name; + + case XFORM_LINK: + file_name = safer_name_suffix (file_name, true, absolute_names_option); + break; + + case XFORM_REGFILE: + file_name = safer_name_suffix (file_name, false, absolute_names_option); + break; + } + + if (strip_name_components) + { + size_t prefix_len = stripped_prefix_len (file_name, + strip_name_components); + if (prefix_len == (size_t) -1) + prefix_len = strlen (file_name); + file_name += prefix_len; + } + return file_name; +} + +static bool +transform_member_name (char **pinput, int type) +{ + return transform_name_fp (pinput, type, decode_xform, &type); +} + +static void +enforce_one_top_level (char **pfile_name) +{ + char *file_name = *pfile_name; + char *p; + + for (p = file_name; *p && (ISSLASH (*p) || *p == '.'); p++) + ; + + if (!*p) + return; + + if (strncmp (p, one_top_level_dir, strlen (one_top_level_dir)) == 0) + { + int pos = strlen (one_top_level_dir); + if (ISSLASH (p[pos]) || p[pos] == 0) + return; + } + + *pfile_name = new_name (one_top_level_dir, file_name); + normalize_filename_x (*pfile_name); + free (file_name); +} + +void +transform_stat_info (int typeflag, struct tar_stat_info *stat_info) +{ + if (typeflag == GNUTYPE_VOLHDR) + /* Name transformations don't apply to volume headers. */ + return; + + transform_member_name (&stat_info->file_name, XFORM_REGFILE); + switch (typeflag) + { + case SYMTYPE: + transform_member_name (&stat_info->link_name, XFORM_SYMLINK); + break; + + case LNKTYPE: + transform_member_name (&stat_info->link_name, XFORM_LINK); + } + + if (one_top_level_option) + enforce_one_top_level (¤t_stat_info.file_name); +} + /* Main loop for reading an archive. */ void read_and (void (*do_something) (void)) @@ -122,6 +222,8 @@ read_and (void (*do_something) (void)) } } + transform_stat_info (current_header->header.typeflag, + ¤t_stat_info); (*do_something) (); continue; @@ -242,7 +344,7 @@ tar_checksum (union block *header, bool silent) int unsigned_sum = 0; /* the POSIX one :-) */ int signed_sum = 0; /* the Sun one :-( */ int recorded_sum; - uintmax_t parsed_sum; + int parsed_sum; char *p; p = header->buffer; @@ -267,9 +369,8 @@ tar_checksum (union block *header, bool silent) parsed_sum = from_header (header->header.chksum, sizeof header->header.chksum, 0, - (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (int), true, silent); - if (parsed_sum == (uintmax_t) -1) + 0, INT_MAX, true, silent); + if (parsed_sum < 0) return HEADER_FAILURE; recorded_sum = parsed_sum; @@ -332,7 +433,11 @@ read_header (union block **return_block, struct tar_stat_info *info, if (header->header.typeflag == LNKTYPE) info->stat.st_size = 0; /* links 0 size on tape */ else - info->stat.st_size = OFF_FROM_HEADER (header->header.size); + { + info->stat.st_size = OFF_FROM_HEADER (header->header.size); + if (info->stat.st_size < 0) + return HEADER_FAILURE; + } if (header->header.typeflag == GNUTYPE_LONGNAME || header->header.typeflag == GNUTYPE_LONGLINK @@ -358,15 +463,13 @@ read_header (union block **return_block, struct tar_stat_info *info, if (header->header.typeflag == GNUTYPE_LONGNAME) { - if (next_long_name) - free (next_long_name); + free (next_long_name); next_long_name = header_copy; next_long_name_blocks = size / BLOCKSIZE; } else { - if (next_long_link) - free (next_long_link); + free (next_long_link); next_long_link = header_copy; next_long_link_blocks = size / BLOCKSIZE; } @@ -425,8 +528,7 @@ read_header (union block **return_block, struct tar_stat_info *info, struct posix_header const *h = &header->header; char namebuf[sizeof h->prefix + 1 + NAME_FIELD_SIZE + 1]; - if (recent_long_name) - free (recent_long_name); + free (recent_long_name); if (next_long_name) { @@ -457,8 +559,7 @@ read_header (union block **return_block, struct tar_stat_info *info, assign_string (&info->file_name, name); info->had_trailing_slash = strip_trailing_slashes (info->file_name); - if (recent_long_link) - free (recent_long_link); + free (recent_long_link); if (next_long_link) { @@ -481,47 +582,6 @@ read_header (union block **return_block, struct tar_stat_info *info, } } -static char * -decode_xform (char *file_name, void *data) -{ - int type = *(int*)data; - - switch (type) - { - case XFORM_SYMLINK: - /* FIXME: It is not quite clear how and to which extent are the symbolic - links subject to filename transformation. In the absence of another - solution, symbolic links are exempt from component stripping and - name suffix normalization, but subject to filename transformation - proper. */ - return file_name; - - case XFORM_LINK: - file_name = safer_name_suffix (file_name, true, absolute_names_option); - break; - - case XFORM_REGFILE: - file_name = safer_name_suffix (file_name, false, absolute_names_option); - break; - } - - if (strip_name_components) - { - size_t prefix_len = stripped_prefix_len (file_name, - strip_name_components); - if (prefix_len == (size_t) -1) - prefix_len = strlen (file_name); - file_name += prefix_len; - } - return file_name; -} - -bool -transform_member_name (char **pinput, int type) -{ - return transform_name_fp (pinput, type, decode_xform, &type); -} - #define ISOCTAL(c) ((c)>='0'&&(c)<='7') /* Decode things from a file HEADER block into STAT_INFO, also setting @@ -542,7 +602,7 @@ decode_header (union block *header, struct tar_stat_info *stat_info, enum archive_format *format_pointer, int do_user_group) { enum archive_format format; - unsigned hbits; /* high bits of the file mode. */ + bool hbits; mode_t mode = MODE_FROM_HEADER (header->header.mode, &hbits); if (strcmp (header->header.magic, TMAGIC) == 0) @@ -558,7 +618,9 @@ decode_header (union block *header, struct tar_stat_info *stat_info, else format = USTAR_FORMAT; } - else if (strcmp (header->header.magic, OLDGNU_MAGIC) == 0) + else if (strcmp (header->buffer + offsetof (struct posix_header, magic), + OLDGNU_MAGIC) + == 0) format = hbits ? OLDGNU_FORMAT : GNU_FORMAT; else format = V7_FORMAT; @@ -572,6 +634,8 @@ decode_header (union block *header, struct tar_stat_info *stat_info, assign_string (&stat_info->gname, header->header.gname[0] ? header->header.gname : NULL); + xheader_xattr_init (stat_info); + if (format == OLDGNU_FORMAT && incremental_option) { stat_info->atime.tv_sec = TIME_FROM_HEADER (header->oldgnu_header.atime); @@ -641,34 +705,34 @@ decode_header (union block *header, struct tar_stat_info *stat_info, || stat_info->dumpdir) stat_info->is_dumpdir = true; } - - transform_member_name (&stat_info->file_name, XFORM_REGFILE); - switch (header->header.typeflag) - { - case SYMTYPE: - transform_member_name (&stat_info->link_name, XFORM_SYMLINK); - break; - - case LNKTYPE: - transform_member_name (&stat_info->link_name, XFORM_LINK); - } } + /* Convert buffer at WHERE0 of size DIGS from external format to - uintmax_t. DIGS must be positive. If TYPE is nonnull, the data - are of type TYPE. The buffer must represent a value in the range - -MINUS_MINVAL through MAXVAL. If OCTAL_ONLY, allow only octal + intmax_t. DIGS must be positive. If TYPE is nonnull, the data are + of type TYPE. The buffer must represent a value in the range + MINVAL through MAXVAL; if the mathematically correct result V would + be greater than INTMAX_MAX, return a negative integer V such that + (uintmax_t) V yields the correct result. If OCTAL_ONLY, allow only octal numbers instead of the other GNU extensions. Return -1 on error, diagnosing the error if TYPE is nonnull and if !SILENT. */ -static uintmax_t +#if ! (INTMAX_MAX <= UINTMAX_MAX && - (INTMAX_MIN + 1) <= UINTMAX_MAX) +# error "from_header internally represents intmax_t as uintmax_t + sign" +#endif +#if ! (UINTMAX_MAX / 2 <= INTMAX_MAX) +# error "from_header returns intmax_t to represent uintmax_t" +#endif +static intmax_t from_header (char const *where0, size_t digs, char const *type, - uintmax_t minus_minval, uintmax_t maxval, + intmax_t minval, uintmax_t maxval, bool octal_only, bool silent) { uintmax_t value; + uintmax_t uminval = minval; + uintmax_t minus_minval = - uminval; char const *where = where0; char const *lim = where + digs; - int negative = 0; + bool negative = false; /* Accommodate buggy tar of unknown vintage, which outputs leading NUL if the previous field overflows. */ @@ -687,7 +751,7 @@ from_header (char const *where0, size_t digs, char const *type, type)); return -1; } - if (!ISSPACE ((unsigned char) *where)) + if (!isspace ((unsigned char) *where)) break; where++; } @@ -696,14 +760,14 @@ from_header (char const *where0, size_t digs, char const *type, if (ISODIGIT (*where)) { char const *where1 = where; - uintmax_t overflow = 0; + bool overflow = false; for (;;) { value += *where++ - '0'; if (where == lim || ! ISODIGIT (*where)) break; - overflow |= value ^ (value << LG_8 >> LG_8); + overflow |= value != (value << LG_8 >> LG_8); value <<= LG_8; } @@ -727,7 +791,7 @@ from_header (char const *where0, size_t digs, char const *type, if (where == lim || ! ISODIGIT (*where)) break; digit = *where - '0'; - overflow |= value ^ (value << LG_8 >> LG_8); + overflow |= value != (value << LG_8 >> LG_8); value <<= LG_8; } value++; @@ -740,7 +804,7 @@ from_header (char const *where0, size_t digs, char const *type, /* TRANSLATORS: Second %s is a type name (gid_t,uid_t,etc.) */ _("Archive octal value %.*s is out of %s range; assuming two's complement"), (int) (where - where1), where1, type)); - negative = 1; + negative = true; } } @@ -820,12 +884,12 @@ from_header (char const *where0, size_t digs, char const *type, return -1; } } - negative = signbit; + negative = signbit != 0; if (negative) value = -value; } - if (where != lim && *where && !ISSPACE ((unsigned char) *where)) + if (where != lim && *where && !isspace ((unsigned char) *where)) { if (type) { @@ -840,7 +904,7 @@ from_header (char const *where0, size_t digs, char const *type, while (where0 != lim && ! lim[-1]) lim--; - quotearg_buffer (buf, sizeof buf, where0, lim - where, o); + quotearg_buffer (buf, sizeof buf, where0, lim - where0, o); if (!silent) ERROR ((0, 0, /* TRANSLATORS: Second %s is a type name (gid_t,uid_t,etc.) */ @@ -852,7 +916,7 @@ from_header (char const *where0, size_t digs, char const *type, } if (value <= (negative ? minus_minval : maxval)) - return negative ? -value : value; + return represent_uintmax (negative ? -value : value); if (type && !silent) { @@ -874,39 +938,38 @@ from_header (char const *where0, size_t digs, char const *type, return -1; } -gid_t +static gid_t gid_from_header (const char *p, size_t s) { return from_header (p, s, "gid_t", - - (uintmax_t) TYPE_MINIMUM (gid_t), - (uintmax_t) TYPE_MAXIMUM (gid_t), + TYPE_MINIMUM (gid_t), TYPE_MAXIMUM (gid_t), false, false); } -major_t +static major_t major_from_header (const char *p, size_t s) { return from_header (p, s, "major_t", - - (uintmax_t) TYPE_MINIMUM (major_t), - (uintmax_t) TYPE_MAXIMUM (major_t), false, false); + TYPE_MINIMUM (major_t), TYPE_MAXIMUM (major_t), + false, false); } -minor_t +static minor_t minor_from_header (const char *p, size_t s) { return from_header (p, s, "minor_t", - - (uintmax_t) TYPE_MINIMUM (minor_t), - (uintmax_t) TYPE_MAXIMUM (minor_t), false, false); + TYPE_MINIMUM (minor_t), TYPE_MAXIMUM (minor_t), + false, false); } /* Convert P to the file mode, as understood by tar. - Store unrecognized mode bits (from 10th up) in HBITS. */ -mode_t -mode_from_header (const char *p, size_t s, unsigned *hbits) + Set *HBITS if there are any unrecognized bits. */ +static mode_t +mode_from_header (const char *p, size_t s, bool *hbits) { - unsigned u = from_header (p, s, "mode_t", - - (uintmax_t) TYPE_MINIMUM (mode_t), - TYPE_MAXIMUM (uintmax_t), false, false); + intmax_t u = from_header (p, s, "mode_t", + INTMAX_MIN, UINTMAX_MAX, + false, false); mode_t mode = ((u & TSUID ? S_ISUID : 0) | (u & TSGID ? S_ISGID : 0) | (u & TSVTX ? S_ISVTX : 0) @@ -919,7 +982,7 @@ mode_from_header (const char *p, size_t s, unsigned *hbits) | (u & TOREAD ? S_IROTH : 0) | (u & TOWRITE ? S_IWOTH : 0) | (u & TOEXEC ? S_IXOTH : 0)); - *hbits = mode ^ u; + *hbits = (u & ~07777) != 0; return mode; } @@ -928,38 +991,31 @@ off_from_header (const char *p, size_t s) { /* Negative offsets are not allowed in tar files, so invoke from_header with minimum value 0, not TYPE_MINIMUM (off_t). */ - return from_header (p, s, "off_t", (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (off_t), false, false); -} - -size_t -size_from_header (const char *p, size_t s) -{ - return from_header (p, s, "size_t", (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (size_t), false, false); + return from_header (p, s, "off_t", + 0, TYPE_MAXIMUM (off_t), + false, false); } -time_t +static time_t time_from_header (const char *p, size_t s) { return from_header (p, s, "time_t", - - (uintmax_t) TYPE_MINIMUM (time_t), - (uintmax_t) TYPE_MAXIMUM (time_t), false, false); + TYPE_MINIMUM (time_t), TYPE_MAXIMUM (time_t), + false, false); } -uid_t +static uid_t uid_from_header (const char *p, size_t s) { return from_header (p, s, "uid_t", - - (uintmax_t) TYPE_MINIMUM (uid_t), - (uintmax_t) TYPE_MAXIMUM (uid_t), false, false); + TYPE_MINIMUM (uid_t), TYPE_MAXIMUM (uid_t), + false, false); } uintmax_t uintmax_from_header (const char *p, size_t s) { - return from_header (p, s, "uintmax_t", (uintmax_t) 0, - TYPE_MAXIMUM (uintmax_t), false, false); + return from_header (p, s, "uintmax_t", 0, UINTMAX_MAX, false, false); } @@ -1049,13 +1105,14 @@ static void simple_print_header (struct tar_stat_info *st, union block *blk, off_t block_ordinal) { - char modes[11]; + char modes[12]; char const *time_stamp; int time_stamp_len; char *temp_name; /* These hold formatted ints. */ - char uform[UINTMAX_STRSIZE_BOUND], gform[UINTMAX_STRSIZE_BOUND]; + char uform[max (INT_BUFSIZE_BOUND (intmax_t), UINTMAX_STRSIZE_BOUND)]; + char gform[sizeof uform]; char *user, *group; char size[2 * UINTMAX_STRSIZE_BOUND]; /* holds formatted size or major,minor */ @@ -1082,7 +1139,10 @@ simple_print_header (struct tar_stat_info *st, union block *blk, if (verbose_option <= 1) { /* Just the fax, mam. */ - fprintf (stdlis, "%s\n", quotearg (temp_name)); + fputs (quotearg (temp_name), stdlis); + if (show_transformed_names_option && st->had_trailing_slash) + fputc ('/', stdlis); + fputc ('\n', stdlis); } else { @@ -1109,9 +1169,7 @@ simple_print_header (struct tar_stat_info *st, union block *blk, case GNUTYPE_SPARSE: case REGTYPE: case AREGTYPE: - modes[0] = '-'; - if (temp_name[strlen (temp_name) - 1] == '/') - modes[0] = 'd'; + modes[0] = st->had_trailing_slash ? 'd' : '-'; break; case LNKTYPE: modes[0] = 'h'; @@ -1141,6 +1199,9 @@ simple_print_header (struct tar_stat_info *st, union block *blk, pax_decode_mode (st->stat.st_mode, modes + 1); + /* extended attributes: GNU `ls -l'-like preview */ + xattrs_print_char (st, modes + 10); + /* Time stamp. */ time_stamp = tartime (st->mtime, full_time_option); @@ -1162,17 +1223,11 @@ simple_print_header (struct tar_stat_info *st, union block *blk, ids that are too large to fit in a uid_t. */ uintmax_t u = from_header (blk->header.uid, sizeof blk->header.uid, 0, - (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (uintmax_t), + 0, UINTMAX_MAX, false, false); - if (u != -1) - user = STRINGIFY_BIGINT (u, uform); - else - { - sprintf (uform, "%ld", - (long) UID_FROM_HEADER (blk->header.uid)); - user = uform; - } + user = (u != -1 + ? STRINGIFY_BIGINT (u, uform) + : imaxtostr (UID_FROM_HEADER (blk->header.uid), uform)); } if (st->gname @@ -1187,17 +1242,11 @@ simple_print_header (struct tar_stat_info *st, union block *blk, ids that are too large to fit in a gid_t. */ uintmax_t g = from_header (blk->header.gid, sizeof blk->header.gid, 0, - (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (uintmax_t), + 0, UINTMAX_MAX, false, false); - if (g != -1) - group = STRINGIFY_BIGINT (g, gform); - else - { - sprintf (gform, "%ld", - (long) GID_FROM_HEADER (blk->header.gid)); - group = gform; - } + group = (g != -1 + ? STRINGIFY_BIGINT (g, gform) + : imaxtostr (GID_FROM_HEADER (blk->header.gid), gform)); } /* Format the file size or major/minor device numbers. */ @@ -1231,6 +1280,8 @@ simple_print_header (struct tar_stat_info *st, union block *blk, datewidth, time_stamp); fprintf (stdlis, " %s", quotearg (temp_name)); + if (show_transformed_names_option && st->had_trailing_slash) + fputc ('/', stdlis); switch (blk->header.typeflag) { @@ -1286,6 +1337,7 @@ simple_print_header (struct tar_stat_info *st, union block *blk, } } fflush (stdlis); + xattrs_print (st); } @@ -1342,8 +1394,8 @@ print_for_mkdir (char *dirname, int length, mode_t mode) STRINGIFY_BIGINT (current_block_ordinal (), buf)); } - fprintf (stdlis, "%s %*s %.*s\n", modes, ugswidth + 1 + datewidth, - _("Creating directory:"), length, quotearg (dirname)); + fprintf (stdlis, "%s %*s %s\n", modes, ugswidth + 1 + datewidth, + _("Creating directory:"), quotearg (dirname)); } } @@ -1400,7 +1452,7 @@ skip_member (void) } void -test_archive_label () +test_archive_label (void) { base64_init (); name_gather ();