Windows: fix parameters and return value from nt_seek

SetFilePointerEx takes specific values
(FILE_BEGIN/FILE_CURRENT/FILE_END) whilse fseek requires SEEK_SET,
SEK_END, SEEK_CUR.  It turns out that these overlap, but we should
not let that pass unchallenged.

SetFilePointerEx returns nonzero for success zero for failure. fseek
returns the other way around.

Neither of these changes currently matter, but we should fix them.

Change-Id: Ib31cf6265fa1e714232ff0d2e099c657e41f17e9
Reviewed-on: http://gerrit.openafs.org/3746
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>

diff --git a/src/vol/ntops.c b/src/vol/ntops.c
index 715480d..645be22 100644 (file)
--- a/src/vol/ntops.c
+++ b/src/vol/ntops.c
@@ -322,15 +322,30 @@ nt_fsync(FD_t fd)
 
 
 int
-nt_seek(FD_t fd, afs_foff_t off, int where)
+nt_seek(FD_t fd, afs_foff_t off, int whence)
 {
     int code;
     LARGE_INTEGER offset;
-
+    int where;
+
+    if (SEEK_SET == whence) {
+       where = FILE_BEGIN;
+    } else if (SEEK_END == whence) {
+       where = FILE_END;
+    } else if (SEEK_CUR == whence) {
+       where = FILE_CURRENT;
+    } else {
+       errno = EINVAL;
+       return -1;
+    }
     offset.QuadPart = off;
 
     code = SetFilePointerEx(fd, offset, NULL, where);
-    return code;
+    if (0 == code) {
+       errno = nterr_nt2unix(GetLastError(), EBADF);
+       return -1;
+    }
+    return 0;
 }
 
 /* nt_DevToDrive

diff --git a/src/vol/ntops.h b/src/vol/ntops.h
index 6661979..e50b2e0 100644 (file)
--- a/src/vol/ntops.h
+++ b/src/vol/ntops.h
@@ -34,7 +34,7 @@ extern int nt_setFileCreationTime(FD_t fd, FILETIME * ftime);
 extern int nt_sync(int cdrive);
 extern int nt_ftruncate(FD_t fd, afs_foff_t len);
 extern int nt_fsync(FD_t fd);
-extern int nt_seek(FD_t fd, afs_foff_t off, int where);
+extern int nt_seek(FD_t fd, afs_foff_t off, int whence);
 extern FILE *nt_fdopen(IHandle_t * h, char *fdperms);
 extern int nt_unlink(char *name);