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tar: optional support for --to-command

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function                                             old     new   delta
data_extract_to_command                                -     430    +430
dec2env                                                -      44     +44
tar_main                                             778     819     +41
str2env                                                -      37     +37
tar_var                                                -      32     +32
xputenv                                                -      22     +22
tar_longopts                                         257     270     +13
------------------------------------------------------------------------------
(add/remove: 6/0 grow/shrink: 2/0 up/down: 619/0)             Total: 619 bytes

Signed-off-by: Ladislav Michl <Ladislav.Michl@seznam.cz>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ladislav Michl
2010-06-25 01:33:00 +02:00
committed by Denys Vlasenko
parent 51fa147c9b
commit 2b46fd49b1
5 changed files with 163 additions and 0 deletions
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12
archival/tar.c
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@ -750,6 +750,7 @@ enum {
IF_FEATURE_SEAMLESS_Z( OPTBIT_COMPRESS ,) // 16th bit
IF_FEATURE_TAR_NOPRESERVE_TIME(OPTBIT_NOPRESERVE_TIME,)
#if ENABLE_FEATURE_TAR_LONG_OPTIONS
IF_FEATURE_TAR_TO_COMMAND(OPTBIT_2COMMAND ,)
OPTBIT_NUMERIC_OWNER,
OPTBIT_NOPRESERVE_PERM,
OPTBIT_OVERWRITE,
@ -772,6 +773,7 @@ enum {
OPT_GZIP = IF_FEATURE_SEAMLESS_GZ( (1 << OPTBIT_GZIP )) + 0, // z
OPT_COMPRESS = IF_FEATURE_SEAMLESS_Z( (1 << OPTBIT_COMPRESS )) + 0, // Z
OPT_NOPRESERVE_TIME = IF_FEATURE_TAR_NOPRESERVE_TIME((1 << OPTBIT_NOPRESERVE_TIME)) + 0, // m
OPT_2COMMAND = IF_FEATURE_TAR_TO_COMMAND( (1 << OPTBIT_2COMMAND )) + 0, // to-command
OPT_NUMERIC_OWNER = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NUMERIC_OWNER )) + 0, // numeric-owner
OPT_NOPRESERVE_PERM = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NOPRESERVE_PERM)) + 0, // no-same-permissions
OPT_OVERWRITE = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_OVERWRITE )) + 0, // overwrite
@ -812,6 +814,9 @@ static const char tar_longopts[] ALIGN1 =
# endif
# if ENABLE_FEATURE_TAR_NOPRESERVE_TIME
"touch\0" No_argument "m"
# endif
# if ENABLE_FEATURE_TAR_TO_COMMAND
"to-command\0" Required_argument "\xfb"
# endif
/* use numeric uid/gid from tar header, not textual */
"numeric-owner\0" No_argument "\xfc"
@ -904,6 +909,7 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
, &tar_filename // -f filename
IF_FEATURE_TAR_FROM(, &(tar_handle->accept)) // T
IF_FEATURE_TAR_FROM(, &(tar_handle->reject)) // X
IF_FEATURE_TAR_TO_COMMAND(, &(tar_handle->tar__to_command)) // --to-command
#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
, &excludes // --exclude
#endif
@ -922,6 +928,12 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
if (opt & OPT_2STDOUT)
tar_handle->action_data = data_extract_to_stdout;
if (opt & OPT_2COMMAND) {
putenv((char*)"TAR_FILETYPE=f");
signal(SIGPIPE, SIG_IGN);
tar_handle->action_data = data_extract_to_command;
}
if (opt & OPT_KEEP_OLD)
tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;