[src/trunk]: src/tests/fs/vfs Add a small testcase that shrink a file using 2...

[njoly <njoly%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f2983ee1e96b
branches:  trunk
changeset: 762760:f2983ee1e96b
user:      njoly <njoly%NetBSD.org@localhost>
date:      Sun Feb 27 15:16:31 2011 +0000

description:
Add a small testcase that shrink a file using 2 consecutive ftruncate
calls.

diffstat:

 tests/fs/vfs/t_io.c |  17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)

diffs (45 lines):

diff -r 2a977d11b624 -r f2983ee1e96b tests/fs/vfs/t_io.c
--- a/tests/fs/vfs/t_io.c       Sun Feb 27 14:01:42 2011 +0000
+++ b/tests/fs/vfs/t_io.c       Sun Feb 27 15:16:31 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_io.c,v 1.7 2011/02/02 14:42:15 pooka Exp $   */
+/*     $NetBSD: t_io.c,v 1.8 2011/02/27 15:16:31 njoly Exp $   */
 
 /*-
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -158,6 +158,19 @@
        overwritebody(tc, 1<<16, true);
 }
 
+static void
+shrinkfile(const atf_tc_t *tc, const char *mp)
+{
+       int fd;
+
+       FSTEST_ENTER();
+       RL(fd = rump_sys_open("file", O_RDWR|O_CREAT|O_TRUNC, 0666));
+       RL(rump_sys_ftruncate(fd, 2));
+       RL(rump_sys_ftruncate(fd, 1));
+       rump_sys_close(fd);
+       FSTEST_EXIT();
+}
+
 ATF_TC_FSAPPLY(holywrite, "create a sparse file and fill hole");
 ATF_TC_FSAPPLY(extendfile, "check that extending a file works");
 ATF_TC_FSAPPLY(extendfile_append, "check that extending a file works "
@@ -165,6 +178,7 @@
 ATF_TC_FSAPPLY(overwrite512, "write a 512 byte file twice");
 ATF_TC_FSAPPLY(overwrite64k, "write a 64k byte file twice");
 ATF_TC_FSAPPLY(overwrite_trunc, "write 64k + truncate + rewrite");
+ATF_TC_FSAPPLY(shrinkfile, "shrink file");
 
 ATF_TP_ADD_TCS(tp)
 {
@@ -175,6 +189,7 @@
        ATF_TP_FSAPPLY(overwrite512);
        ATF_TP_FSAPPLY(overwrite64k);
        ATF_TP_FSAPPLY(overwrite_trunc);
+       ATF_TP_FSAPPLY(shrinkfile);
 
        return atf_no_error();
 }