4 #include <linux/compiler.h>
11 static const char *lzma_strerror(lzma_ret ret)
15 return "Memory allocation failed";
16 case LZMA_OPTIONS_ERROR:
17 return "Unsupported decompressor flags";
18 case LZMA_FORMAT_ERROR:
19 return "The input is not in the .xz format";
21 return "Compressed file is corrupt";
23 return "Compressed file is truncated or otherwise corrupt";
25 return "Unknown error, possibly a bug";
29 int lzma_decompress_to_file(const char *input, int output_fd)
31 lzma_action action = LZMA_RUN;
32 lzma_stream strm = LZMA_STREAM_INIT;
40 infile = fopen(input, "rb");
42 pr_err("lzma: fopen failed on %s: '%s'\n",
43 input, strerror(errno));
47 ret = lzma_stream_decoder(&strm, UINT64_MAX, LZMA_CONCATENATED);
49 pr_err("lzma: lzma_stream_decoder failed %s (%d)\n",
50 lzma_strerror(ret), ret);
56 strm.next_out = buf_out;
57 strm.avail_out = sizeof(buf_out);
60 if (strm.avail_in == 0 && !feof(infile)) {
61 strm.next_in = buf_in;
62 strm.avail_in = fread(buf_in, 1, sizeof(buf_in), infile);
65 pr_err("lzma: read error: %s\n", strerror(errno));
73 ret = lzma_code(&strm, action);
75 if (strm.avail_out == 0 || ret == LZMA_STREAM_END) {
76 ssize_t write_size = sizeof(buf_out) - strm.avail_out;
78 if (writen(output_fd, buf_out, write_size) != write_size) {
79 pr_err("lzma: write error: %s\n", strerror(errno));
83 strm.next_out = buf_out;
84 strm.avail_out = sizeof(buf_out);
88 if (ret == LZMA_STREAM_END)
91 pr_err("lzma: failed %s\n", lzma_strerror(ret));