tar: change -a from meaning "lzma" to mean "autodetect by extension"
function old new delta tar_main 1026 1100 +74 packed_usage 33311 33329 +18 tar_longopts 309 325 +16 vfork_compressor 246 210 -36 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/1 up/down: 108/-36) Total: 72 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -637,8 +637,14 @@ static void NOINLINE vfork_compressor(int tar_fd, const char *gzip)
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}
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xmove_fd(data.rd, 0);
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xmove_fd(tfd, 1);
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/* exec gzip/bzip2 program/applet */
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BB_EXECLP(gzip, gzip, "-f", (char *)0);
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/* exec gzip/bzip2/... program */
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//BB_EXECLP(gzip, gzip, "-f", (char *)0); - WRONG for "xz",
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// if xz is an enabled applet, it'll be a version which
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// can only decompress. We do need to execute external
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// program, not applet.
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execlp(gzip, gzip, "-f", (char *)0);
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vfork_exec_errno = errno;
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_exit(EXIT_FAILURE);
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}
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@ -762,7 +768,7 @@ static llist_t *append_file_list_to_list(llist_t *list)
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//usage: IF_FEATURE_SEAMLESS_GZ("z")
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//usage: IF_FEATURE_SEAMLESS_XZ("J")
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//usage: IF_FEATURE_SEAMLESS_BZ2("j")
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//usage: IF_FEATURE_SEAMLESS_LZMA("a")
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//usage: "a"
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//usage: IF_FEATURE_TAR_CREATE("h")
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//usage: IF_FEATURE_TAR_NOPRESERVE_TIME("m")
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//usage: "vokO] "
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@ -801,9 +807,7 @@ static llist_t *append_file_list_to_list(llist_t *list)
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//usage: IF_FEATURE_SEAMLESS_BZ2(
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//usage: "\n -j (De)compress using bzip2"
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//usage: )
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//usage: IF_FEATURE_SEAMLESS_LZMA(
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//usage: "\n -a (De)compress using lzma"
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//usage: )
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//usage: "\n -a (De)compress based on extension"
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//usage: IF_FEATURE_TAR_CREATE(
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//usage: "\n -h Follow symlinks"
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//usage: )
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@ -820,6 +824,7 @@ static llist_t *append_file_list_to_list(llist_t *list)
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//usage: "$ tar -cf /tmp/tarball.tar /usr/local\n"
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// Supported but aren't in --help:
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// lzma
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// no-recursion
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// numeric-owner
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// no-same-permissions
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@ -833,15 +838,16 @@ enum {
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IF_FEATURE_TAR_CREATE( OPTBIT_CREATE ,)
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IF_FEATURE_TAR_CREATE( OPTBIT_DEREFERENCE ,)
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IF_FEATURE_SEAMLESS_BZ2( OPTBIT_BZIP2 ,)
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IF_FEATURE_SEAMLESS_LZMA(OPTBIT_LZMA ,)
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IF_FEATURE_TAR_FROM( OPTBIT_INCLUDE_FROM,)
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IF_FEATURE_TAR_FROM( OPTBIT_EXCLUDE_FROM,)
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IF_FEATURE_SEAMLESS_GZ( OPTBIT_GZIP ,)
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IF_FEATURE_SEAMLESS_XZ( OPTBIT_XZ ,) // 16th bit
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IF_FEATURE_SEAMLESS_Z( OPTBIT_COMPRESS ,)
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IF_FEATURE_SEAMLESS_XZ( OPTBIT_XZ ,)
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IF_FEATURE_SEAMLESS_Z( OPTBIT_COMPRESS ,) // 16th bit
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OPTBIT_AUTOCOMPRESS_BY_EXT,
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IF_FEATURE_TAR_NOPRESERVE_TIME(OPTBIT_NOPRESERVE_TIME,)
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#if ENABLE_FEATURE_TAR_LONG_OPTIONS
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OPTBIT_STRIP_COMPONENTS,
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IF_FEATURE_SEAMLESS_LZMA(OPTBIT_LZMA ,)
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OPTBIT_NORECURSION,
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IF_FEATURE_TAR_TO_COMMAND(OPTBIT_2COMMAND ,)
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OPTBIT_NUMERIC_OWNER,
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@ -860,14 +866,15 @@ enum {
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OPT_CREATE = IF_FEATURE_TAR_CREATE( (1 << OPTBIT_CREATE )) + 0, // c
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OPT_DEREFERENCE = IF_FEATURE_TAR_CREATE( (1 << OPTBIT_DEREFERENCE )) + 0, // h
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OPT_BZIP2 = IF_FEATURE_SEAMLESS_BZ2( (1 << OPTBIT_BZIP2 )) + 0, // j
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OPT_LZMA = IF_FEATURE_SEAMLESS_LZMA((1 << OPTBIT_LZMA )) + 0, // a
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OPT_INCLUDE_FROM = IF_FEATURE_TAR_FROM( (1 << OPTBIT_INCLUDE_FROM)) + 0, // T
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OPT_EXCLUDE_FROM = IF_FEATURE_TAR_FROM( (1 << OPTBIT_EXCLUDE_FROM)) + 0, // X
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OPT_GZIP = IF_FEATURE_SEAMLESS_GZ( (1 << OPTBIT_GZIP )) + 0, // z
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OPT_XZ = IF_FEATURE_SEAMLESS_XZ( (1 << OPTBIT_XZ )) + 0, // J
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OPT_COMPRESS = IF_FEATURE_SEAMLESS_Z( (1 << OPTBIT_COMPRESS )) + 0, // Z
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OPT_AUTOCOMPRESS_BY_EXT = 1 << OPTBIT_AUTOCOMPRESS_BY_EXT, // a
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OPT_NOPRESERVE_TIME = IF_FEATURE_TAR_NOPRESERVE_TIME((1 << OPTBIT_NOPRESERVE_TIME)) + 0, // m
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OPT_STRIP_COMPONENTS = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_STRIP_COMPONENTS)) + 0, // strip-components
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OPT_LZMA = IF_FEATURE_TAR_LONG_OPTIONS(IF_FEATURE_SEAMLESS_LZMA((1 << OPTBIT_LZMA))) + 0, // lzma
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OPT_NORECURSION = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NORECURSION )) + 0, // no-recursion
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OPT_2COMMAND = IF_FEATURE_TAR_TO_COMMAND( (1 << OPTBIT_2COMMAND )) + 0, // to-command
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OPT_NUMERIC_OWNER = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NUMERIC_OWNER )) + 0, // numeric-owner
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@ -897,9 +904,6 @@ static const char tar_longopts[] ALIGN1 =
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# if ENABLE_FEATURE_SEAMLESS_BZ2
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"bzip2\0" No_argument "j"
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# endif
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# if ENABLE_FEATURE_SEAMLESS_LZMA
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"lzma\0" No_argument "a"
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# endif
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# if ENABLE_FEATURE_TAR_FROM
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"files-from\0" Required_argument "T"
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"exclude-from\0" Required_argument "X"
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@ -913,10 +917,14 @@ static const char tar_longopts[] ALIGN1 =
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# if ENABLE_FEATURE_SEAMLESS_Z
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"compress\0" No_argument "Z"
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# endif
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"auto-compress\0" No_argument "a"
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# if ENABLE_FEATURE_TAR_NOPRESERVE_TIME
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"touch\0" No_argument "m"
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# endif
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"strip-components\0" Required_argument "\xf9"
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"strip-components\0" Required_argument "\xf8"
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# if ENABLE_FEATURE_SEAMLESS_LZMA
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"lzma\0" No_argument "\xf9"
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# endif
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"no-recursion\0" No_argument "\xfa"
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# if ENABLE_FEATURE_TAR_TO_COMMAND
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"to-command\0" Required_argument "\xfb"
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@ -1005,13 +1013,13 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
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"txC:f:Oopvk"
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IF_FEATURE_TAR_CREATE( "ch" )
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IF_FEATURE_SEAMLESS_BZ2( "j" )
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IF_FEATURE_SEAMLESS_LZMA("a" )
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IF_FEATURE_TAR_FROM( "T:*X:*")
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IF_FEATURE_SEAMLESS_GZ( "z" )
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IF_FEATURE_SEAMLESS_XZ( "J" )
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IF_FEATURE_SEAMLESS_Z( "Z" )
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"a"
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IF_FEATURE_TAR_NOPRESERVE_TIME("m")
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IF_FEATURE_TAR_LONG_OPTIONS("\xf9:") // --strip-components
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IF_FEATURE_TAR_LONG_OPTIONS("\xf8:") // --strip-components
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"\0"
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"tt:vv:" // count -t,-v
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#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
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@ -1040,7 +1048,7 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
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);
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#if DBG_OPTION_PARSING
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bb_error_msg("opt: 0x%08x", opt);
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# define showopt(o) bb_error_msg("opt & %s(%x): %x", #o, o, opt & o);
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# define showopt(o) bb_error_msg("opt & %s(%x):\t%x", #o, o, opt & o);
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showopt(OPT_TEST );
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showopt(OPT_EXTRACT );
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showopt(OPT_BASEDIR );
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@ -1053,14 +1061,15 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
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showopt(OPT_CREATE );
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showopt(OPT_DEREFERENCE );
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showopt(OPT_BZIP2 );
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showopt(OPT_LZMA );
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showopt(OPT_INCLUDE_FROM );
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showopt(OPT_EXCLUDE_FROM );
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showopt(OPT_GZIP );
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showopt(OPT_XZ );
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showopt(OPT_COMPRESS );
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showopt(OPT_AUTOCOMPRESS_BY_EXT);
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showopt(OPT_NOPRESERVE_TIME );
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showopt(OPT_STRIP_COMPONENTS);
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showopt(OPT_LZMA );
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showopt(OPT_NORECURSION );
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showopt(OPT_2COMMAND );
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showopt(OPT_NUMERIC_OWNER );
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@ -1179,6 +1188,21 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
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bb_perror_msg_and_die("can't open '%s'", tar_filename);
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} else {
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tar_handle->src_fd = xopen(tar_filename, flags);
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#if ENABLE_FEATURE_TAR_CREATE
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if ((OPT_GZIP | OPT_BZIP2 | OPT_XZ | OPT_LZMA) != 0 /* at least one is config-enabled */
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&& (opt & OPT_AUTOCOMPRESS_BY_EXT)
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&& flags != O_RDONLY
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) {
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if (OPT_GZIP != 0 && is_suffixed_with(tar_filename, "gz"))
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opt |= OPT_GZIP;
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if (OPT_BZIP2 != 0 && is_suffixed_with(tar_filename, "bz2"))
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opt |= OPT_BZIP2;
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if (OPT_XZ != 0 && is_suffixed_with(tar_filename, "xz"))
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opt |= OPT_XZ;
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if (OPT_LZMA != 0 && is_suffixed_with(tar_filename, "lzma"))
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opt |= OPT_LZMA;
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}
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#endif
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}
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}
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