gcc 4.3.2 has started to warn about:
gcc -o blktrace.o -c -Wall -O2 -g -W -D_GNU_SOURCE -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 blktrace.c
blktrace.c: In function â??tip_ftrunc_finalâ??:
blktrace.c:662: warning: ignoring return value of â??ftruncateâ??, declared
with attribute warn_unused_result
This simple patch overcomes that - no exit is performed as this is not
fatal, and the thread will be exitting soon enough.
Signed-off-by: Alan D. Brunelle <alan.brunelle@xxxxxx>
---
blktrace.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/blktrace.c b/blktrace.c
index 7e27f14..ad54db5 100644
--- a/blktrace.c
+++ b/blktrace.c
@@ -654,12 +654,18 @@ static void tip_ftrunc_final(struct thread_information *tip)
* truncate to right size and cleanup mmap
*/
if (tip->ofile_mmap && tip->ofile) {
+ int ret;
int ofd = fileno(tip->ofile);
if (tip->fs_buf)
munmap(tip->fs_buf, tip->fs_buf_len);
- ftruncate(ofd, tip->fs_size);
+ ret = ftruncate(ofd, tip->fs_size);
+ if (ret < 0) {
+ perror(tip->fn);
+ fprintf(stderr, "Warning: thread %d ftrunc failed\n",
+ tip->cpu);
+ }
}
}
--
1.5.6.3
