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tar: fix exitcode check for MMU-spawned unpacking helpers

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Testcase: tar xvzf EMPTY_FILE

function                                             old     new   delta
open_transformer                                     102     106      +4
get_header_tar                                      1781    1785      +4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2013-11-19 14:44:04 +01:00
parent 8b59b2c13e
commit ebfa9b5aa1
2 changed files with 10 additions and 9 deletions
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14
archival/libarchive/get_header_tar.c
View File

@ -198,13 +198,13 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
* the message and we don't check whether we indeed
* saw zero block directly before this. */
if (i == 0) {
xfunc_error_retval = 0;
short_read:
bb_error_msg_and_die("short read");
bb_error_msg("short read");
/* this merely signals end of archive, not exit(1): */
return EXIT_FAILURE;
}
if (i != 512) {
IF_FEATURE_TAR_AUTODETECT(goto autodetect;)
goto short_read;
bb_error_msg_and_die("short read");
}
#else
@ -221,10 +221,10 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
*/
while (full_read(archive_handle->src_fd, &tar, 512) == 512)
continue;
return EXIT_FAILURE;
return EXIT_FAILURE; /* "end of archive" */
}
archive_handle->tar__end = 1;
return EXIT_SUCCESS;
return EXIT_SUCCESS; /* "decoded one header" */
}
archive_handle->tar__end = 0;
@ -471,5 +471,5 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
free(file_header->tar__uname);
free(file_header->tar__gname);
#endif
return EXIT_SUCCESS;
return EXIT_SUCCESS; /* "decoded one header" */
}

5
archival/libarchive/open_transformer.c
View File

@ -79,16 +79,17 @@ void FAST_FUNC open_transformer(int fd, const char *transform_prog)
// FIXME: error check?
#if BB_MMU
{
IF_DESKTOP(long long) int r;
transformer_aux_data_t aux;
init_transformer_aux_data(&aux);
aux.check_signature = check_signature;
transformer(&aux, fd, fd_pipe.wr);
r = transformer(&aux, fd, fd_pipe.wr);
if (ENABLE_FEATURE_CLEAN_UP) {
close(fd_pipe.wr); /* send EOF */
close(fd);
}
/* must be _exit! bug was actually seen here */
_exit(EXIT_SUCCESS);
_exit(/*error if:*/ r < 0);
}
#else
{