Patchwork [05/18] block/qcow.c: fix warnings with _FORTIFY_SOURCE

login
register
mail settings
Submitter Kirill A. Shutemov
Date Dec. 20, 2009, 1:39 a.m.
Message ID <1261273167-3240-5-git-send-email-kirill@shutemov.name>
Download mbox | patch
Permalink /patch/41490/
State New
Headers show

Comments

Kirill A. Shutemov - Dec. 20, 2009, 1:39 a.m.
CC    block/qcow.o
cc1: warnings being treated as errors
block/qcow.c: In function 'qcow_create':
block/qcow.c:804: error: ignoring return value of 'write', declared with attribute warn_unused_result
block/qcow.c:806: error: ignoring return value of 'write', declared with attribute warn_unused_result
block/qcow.c:811: error: ignoring return value of 'write', declared with attribute warn_unused_result
make: *** [block/qcow.o] Error 1

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
---
 block/qcow.c |   26 ++++++++++++++++++++++----
 1 files changed, 22 insertions(+), 4 deletions(-)

Patch

diff --git a/block/qcow.c b/block/qcow.c
index 7fc85ae..db5a0e2 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -750,6 +750,7 @@  static int qcow_create(const char *filename, QEMUOptionParameter *options)
     int64_t total_size = 0;
     const char *backing_file = NULL;
     int flags = 0;
+    int ret;
 
     /* Read out options */
     while (options && options->name) {
@@ -801,17 +802,34 @@  static int qcow_create(const char *filename, QEMUOptionParameter *options)
     }
 
     /* write all the data */
-    write(fd, &header, sizeof(header));
+    ret = write(fd, &header, sizeof(header));
+    if (ret != sizeof(header)) {
+        ret = -errno;
+        goto exit;
+    }
+
     if (backing_file) {
-        write(fd, backing_file, backing_filename_len);
+        ret = write(fd, backing_file, backing_filename_len);
+        if (ret != backing_filename_len) {
+            ret = -errno;
+            goto exit;
+        }
+
     }
     lseek(fd, header_size, SEEK_SET);
     tmp = 0;
     for(i = 0;i < l1_size; i++) {
-        write(fd, &tmp, sizeof(tmp));
+        ret = write(fd, &tmp, sizeof(tmp));
+        if (ret != sizeof(tmp)) {
+            ret = -errno;
+            goto exit;
+        }
     }
+
+    ret = 0;
+exit:
     close(fd);
-    return 0;
+    return ret;
 }
 
 static int qcow_make_empty(BlockDriverState *bs)