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tar: prevent empty file to be treated as valid tarball

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function                                             old     new   delta
tar_main                                             879     895     +16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2013-11-19 17:17:48 +01:00
parent dd1d8ab506
commit 0545e3b69a
2 changed files with 35 additions and 3 deletions
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13
archival/tar.c
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@@ -1196,8 +1196,14 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
/*tar_handle->offset = 0; - already is */
}
/* Zero processed headers (== empty file) is not a valid tarball.
* We (ab)use bb_got_signal as exitcode here,
* because check_errors_in_children() uses _it_ as error indicator.
*/
bb_got_signal = EXIT_FAILURE;
while (get_header_tar(tar_handle) == EXIT_SUCCESS)
continue;
bb_got_signal = EXIT_SUCCESS; /* saw at least one header, good */
/* Check that every file that should have been extracted was */
while (tar_handle->accept) {
@@ -1213,8 +1219,9 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
close(tar_handle->src_fd);
if (SEAMLESS_COMPRESSION || OPT_COMPRESS) {
/* Set bb_got_signal to 1 if a child died with !0 exitcode */
check_errors_in_children(0);
return bb_got_signal;
}
return EXIT_SUCCESS;
return bb_got_signal;
}