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[1765] | 1 | /* vi: set sw=4 ts=4: */
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[821] | 2 | /*
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[1765] | 3 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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[821] | 4 | */
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| 5 |
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| 6 | #include "libbb.h"
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| 7 | #include "unarchive.h"
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| 8 |
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| 9 | char get_header_tar_gz(archive_handle_t *archive_handle)
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| 10 | {
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[1765] | 11 | #if BB_MMU
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[821] | 12 | unsigned char magic[2];
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[1765] | 13 | #endif
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[821] | 14 |
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[1765] | 15 | /* Can't lseek over pipes */
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| 16 | archive_handle->seek = seek_by_read;
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[821] | 17 |
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[1765] | 18 | /* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
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| 19 | * Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
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| 20 | * need the header. */
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| 21 | #if BB_MMU
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| 22 | xread(archive_handle->src_fd, &magic, 2);
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[821] | 23 | if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
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[1765] | 24 | bb_error_msg_and_die("invalid gzip magic");
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[821] | 25 | }
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| 26 |
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[1765] | 27 | check_header_gzip_or_die(archive_handle->src_fd);
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| 28 | #endif
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[821] | 29 |
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[1765] | 30 | archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip", "gunzip", "-cf", "-", NULL);
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[821] | 31 | archive_handle->offset = 0;
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[1765] | 32 | while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
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[821] | 33 |
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| 34 | /* Can only do one file at a time */
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[1765] | 35 | return EXIT_FAILURE;
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[821] | 36 | }
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