3 #include <linux/compiler.h>
9 static const char *lzma_strerror(lzma_ret ret)
13 return "Memory allocation failed";
14 case LZMA_OPTIONS_ERROR:
15 return "Unsupported decompressor flags";
16 case LZMA_FORMAT_ERROR:
17 return "The input is not in the .xz format";
19 return "Compressed file is corrupt";
21 return "Compressed file is truncated or otherwise corrupt";
23 return "Unknown error, possibly a bug";
27 int lzma_decompress_to_file(const char *input, int output_fd)
29 lzma_action action = LZMA_RUN;
30 lzma_stream strm = LZMA_STREAM_INIT;
37 infile = fopen(input, "rb");
39 pr_err("lzma: fopen failed on %s: '%s'\n",
40 input, strerror(errno));
44 ret = lzma_stream_decoder(&strm, UINT64_MAX, LZMA_CONCATENATED);
46 pr_err("lzma: lzma_stream_decoder failed %s (%d)\n",
47 lzma_strerror(ret), ret);
53 strm.next_out = buf_out;
54 strm.avail_out = sizeof(buf_out);
57 if (strm.avail_in == 0 && !feof(infile)) {
58 strm.next_in = buf_in;
59 strm.avail_in = fread(buf_in, 1, sizeof(buf_in), infile);
62 pr_err("lzma: read error: %s\n", strerror(errno));
70 ret = lzma_code(&strm, action);
72 if (strm.avail_out == 0 || ret == LZMA_STREAM_END) {
73 ssize_t write_size = sizeof(buf_out) - strm.avail_out;
75 if (writen(output_fd, buf_out, write_size) != write_size) {
76 pr_err("lzma: write error: %s\n", strerror(errno));
80 strm.next_out = buf_out;
81 strm.avail_out = sizeof(buf_out);
85 if (ret == LZMA_STREAM_END)
88 pr_err("lzma: failed %s\n", lzma_strerror(ret));