libfdisk: check returns [coverity scan]

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/libfdisk/src/gpt.c b/libfdisk/src/gpt.c
index 58ebdc688494ff62932341214ef91ebbb533d4d6..f300d3a1bcf523a2a7afda1856b755268737eb87 100644 (file)
--- a/libfdisk/src/gpt.c
+++ b/libfdisk/src/gpt.c
@@ -533,8 +533,9 @@ static ssize_t read_lba(struct fdisk_context *cxt, uint64_t lba,
 {
        off_t offset = lba * cxt->sector_size;
 
-       lseek(cxt->dev_fd, offset, SEEK_SET);
-       return read(cxt->dev_fd, buffer, bytes);
+       if (lseek(cxt->dev_fd, offset, SEEK_SET) == (off_t) -1)
+               return -1;
+       return read(cxt->dev_fd, buffer, bytes) != bytes;
 }
 
 
@@ -720,7 +721,7 @@ static struct gpt_header *gpt_read_header(struct fdisk_context *cxt,
                return NULL;
 
        /* read and verify header */
-       if (!read_lba(cxt, lba, header, sizeof(struct gpt_header)))
+       if (read_lba(cxt, lba, header, sizeof(struct gpt_header)) != 0)
                goto invalid;
 
        if (!gpt_check_signature(header))