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38 lines
1021 B
C
38 lines
1021 B
C
/* vi: set sw=4 ts=4: */
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/*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include "unarchive.h"
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char get_header_tar_gz(archive_handle_t *archive_handle)
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{
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#if BB_MMU
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unsigned char magic[2];
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#endif
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/* Can't lseek over pipes */
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archive_handle->seek = seek_by_read;
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/* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
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* Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
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* need the header. */
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#if BB_MMU
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xread(archive_handle->src_fd, &magic, 2);
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if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
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bb_error_msg_and_die("invalid gzip magic");
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}
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check_header_gzip_or_die(archive_handle->src_fd);
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#endif
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip", "gunzip", "-cf", "-", NULL);
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archive_handle->offset = 0;
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while (get_header_tar(archive_handle) == EXIT_SUCCESS)
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continue;
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/* Can only do one file at a time */
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return EXIT_FAILURE;
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}
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