blob: dd655f557c1c1a1515a2bcc8d8edb82792604dbb (
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/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#include "unarchive.h"
char get_header_tar_gz(archive_handle_t *archive_handle)
{
#if BB_MMU
unsigned char magic[2];
#endif
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
/* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
* Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
* need the header. */
#if BB_MMU
xread(archive_handle->src_fd, &magic, 2);
if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
bb_error_msg_and_die("invalid gzip magic");
}
#endif
archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip", "gunzip", "-cf", "-", NULL);
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
/* Can only do one file at a time */
return EXIT_FAILURE;
}
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