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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-06-11 17:45:44 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-06-11 17:45:44 +0200
commit578fc9124db4c50ca8c5fac865296139be8c8dfd (patch)
treecdf75b58a0a43d1eb12f561b78bae96041795e5d /unpack/extract_file.c
parenta3a47476c5ceed1688e37a5af8a5a988b504832e (diff)
Move file extraction code to generic data_reader_t in libsquashfs.a
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'unpack/extract_file.c')
-rw-r--r--unpack/extract_file.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/unpack/extract_file.c b/unpack/extract_file.c
deleted file mode 100644
index 62d1086..0000000
--- a/unpack/extract_file.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-#include "rdsquashfs.h"
-
-int extract_file(file_info_t *fi, unsqfs_info_t *info, int outfd)
-{
- size_t i, count, fragsz;
- bool compressed;
- uint32_t bs;
- ssize_t ret;
- void *ptr;
-
- count = fi->size / info->block_size;
-
- if (count > 0) {
- if (lseek(info->sqfsfd, fi->startblock, SEEK_SET) == (off_t)-1)
- goto fail_seek;
-
- for (i = 0; i < count; ++i) {
- bs = fi->blocksizes[i];
-
- compressed = (bs & (1 << 24)) == 0;
- bs &= (1 << 24) - 1;
-
- if (bs > info->block_size)
- goto fail_bs;
-
- ret = read_retry(info->sqfsfd, info->buffer, bs);
- if (ret < 0)
- goto fail_rd;
-
- if ((size_t)ret < bs)
- goto fail_trunc;
-
- if (compressed) {
- ret = info->cmp->do_block(info->cmp,
- info->buffer, bs,
- info->scratch,
- info->block_size);
- if (ret <= 0)
- return -1;
-
- bs = ret;
- ptr = info->scratch;
- } else {
- ptr = info->buffer;
- }
-
- ret = write_retry(outfd, ptr, bs);
- if (ret < 0)
- goto fail_wr;
-
- if ((size_t)ret < bs)
- goto fail_wr_trunc;
- }
- }
-
- fragsz = fi->size % info->block_size;
-
- if (fragsz > 0) {
- if (frag_reader_read(info->frag, fi->fragment,
- fi->fragment_offset, info->buffer,
- fragsz)) {
- return -1;
- }
-
- ret = write_retry(outfd, info->buffer, fragsz);
- if (ret < 0)
- goto fail_wr;
-
- if ((size_t)ret < fragsz)
- goto fail_wr_trunc;
- }
-
- return 0;
-fail_seek:
- perror("seek on squashfs");
- return -1;
-fail_wr:
- perror("writing uncompressed block");
- return -1;
-fail_wr_trunc:
- fputs("writing uncompressed block: truncated write\n", stderr);
- return -1;
-fail_rd:
- perror("reading from squashfs");
- return -1;
-fail_trunc:
- fputs("reading from squashfs: unexpected end of file\n", stderr);
- return -1;
-fail_bs:
- fputs("found compressed block larger than block size\n", stderr);
- return -1;
-}