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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-09-08 14:53:30 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-09-08 14:53:30 +0200
commit3a851dfe87c88ac1d4dddc2a26cc48b037f852f9 (patch)
treea8a8f34291aa58b25737088d247a91a7f60b4fec /lib/util/padd_file.c
parent60064dd0412a149fe00cfc4e2f2361c22656db57 (diff)
Replace direct file I/O with abstraction layer
This should make it easier to use libsquashfs with custom setups that embedd a squashfs image inside something else. Also, it should make it easier to port to non unix-like platforms. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/util/padd_file.c')
-rw-r--r--lib/util/padd_file.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/util/padd_file.c b/lib/util/padd_file.c
index 9a2428d..21950b4 100644
--- a/lib/util/padd_file.c
+++ b/lib/util/padd_file.c
@@ -6,6 +6,7 @@
*/
#include "config.h"
+#include "sqfs/io.h"
#include "util.h"
#include <stdlib.h>
@@ -39,3 +40,32 @@ fail_errno:
perror("padding output file to block size");
goto out;
}
+
+int padd_sqfs(sqfs_file_t *file, uint64_t size, size_t blocksize)
+{
+ size_t padd_sz = size % blocksize;
+ int status = -1;
+ uint8_t *buffer;
+
+ if (padd_sz == 0)
+ return 0;
+
+ padd_sz = blocksize - padd_sz;
+
+ buffer = calloc(1, padd_sz);
+ if (buffer == NULL)
+ goto fail_errno;
+
+ if (file->write_at(file, file->get_size(file),
+ buffer, padd_sz)) {
+ goto fail_errno;
+ }
+
+ status = 0;
+out:
+ free(buffer);
+ return status;
+fail_errno:
+ perror("padding output file to block size");
+ goto out;
+}