[PATCH] xfstests: use native definition of O_DIRECT flag

[Eric Whitney <enwlinux@xxxxxxxxx>]

The definition of O_DIRECT in src/trunc.c causes xfstest 125 to fail
when run on a Pandaboard.  On ARM, the value used (0x040000) is
O_DIRECTORY rather than O_DIRECT as it is on x86.  Prefer the platform's
native definition of O_DIRECT supplied by fcntl.h if available.  Also,
fix a couple of error messages to properly reflect their context.

Signed-off-by: Eric Whitney <enwlinux@xxxxxxxxx>
---
 src/trunc.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/trunc.c b/src/trunc.c
index 7539532..38fb21f 100644
--- a/src/trunc.c
+++ b/src/trunc.c
@@ -26,7 +26,9 @@
 #include <stdlib.h>
 #include <string.h>
 
+#ifndef O_DIRECT
 #define O_DIRECT       040000
+#endif
 
 #define WAITTIME       60
 #define BUFSIZE                4096
@@ -82,7 +84,7 @@ while((c=getopt(argc,argv,"f:"))!=EOF) {
 
        printf("direct write of 1's into file\n");      
        err = write(fd, buf, BUFSIZE);
-       if (err < 0) perror("buffered write failed");
+       if (err < 0) perror("direct write failed");
 
        close(fd);
        
@@ -96,7 +98,7 @@ while((c=getopt(argc,argv,"f:"))!=EOF) {
 
        printf("buffered write of 2's into file\n");    
        err = write(fd, buf, BUFSIZE);
-       if (err < 0) perror("direct write failed");
+       if (err < 0) perror("buffered write failed");
 
        /* 1 now on disk, but 2 data is buffered */
 
-- 
1.7.10.4