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io: Add FUSE-based test for fchmod

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Test all mode arguments, and that extra bits are ignored
as required by POSIX.

Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Florian Weimer 2024-08-22 11:02:51 +02:00
parent f4ae345810
commit 43669fcf73
2 changed files with 115 additions and 0 deletions
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1
io/Makefile
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@ -189,6 +189,7 @@ tests := \
tst-copy_file_range \
tst-faccessat \
tst-fchmod-errors \
tst-fchmod-fuse \
tst-fchmodat \
tst-fchownat \
tst-fcntl \

114
io/tst-fchmod-fuse.c Normal file
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@ -0,0 +1,114 @@
/* FUSE-based test for fchmod.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <support/fuse.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xunistd.h>
/* Set from do_test to indicate the expected incoming mode change request. */
static _Atomic int expected_mode;
static void
fuse_thread (struct support_fuse *f, void *closure)
{
struct fuse_in_header *inh;
while ((inh = support_fuse_next (f)) != NULL)
{
if (support_fuse_handle_mountpoint (f)
|| (inh->nodeid == 1 && support_fuse_handle_directory (f)))
continue;
switch (inh->opcode)
{
case FUSE_LOOKUP:
{
char *name = support_fuse_cast (LOOKUP, inh);
TEST_COMPARE_STRING (name, "file");
struct fuse_entry_out *out
= support_fuse_prepare_entry (f, 2);
out->attr.mode = S_IFREG | 0600;
support_fuse_reply_prepared (f);
}
break;
case FUSE_OPEN:
{
TEST_COMPARE (inh->nodeid, 2);
struct fuse_open_in *p = support_fuse_cast (OPEN, inh);
TEST_COMPARE (p->flags & O_ACCMODE, O_RDWR);
struct fuse_open_out out = { 0, };
support_fuse_reply (f, &out, sizeof (out));
}
break;
case FUSE_SETATTR:
{
TEST_COMPARE (inh->nodeid, 2);
struct fuse_setattr_in *p = support_fuse_cast (SETATTR, inh);
TEST_COMPARE (p->valid , FATTR_MODE);
TEST_COMPARE (p->mode, S_IFREG | expected_mode);
struct fuse_attr_out *out = support_fuse_prepare_attr (f);
out->attr.mode = S_IFREG | p->mode;
support_fuse_reply_prepared (f);
}
break;
case FUSE_FLUSH:
support_fuse_reply_empty (f);
break;
default:
support_fuse_reply_error (f, EIO);
}
}
}
/* Test all mode values with the specified extra bits. */
static void
test_with_bits (int fd, unsigned int extra_bits)
{
for (int do_mode = 0; do_mode <= 07777; ++do_mode)
{
expected_mode = do_mode;
TEST_COMPARE (fchmod (fd, extra_bits | do_mode), 0);
}
}
static int
do_test (void)
{
support_fuse_init ();
struct support_fuse *f = support_fuse_mount (fuse_thread, NULL);
char *path = xasprintf ("%s/file", support_fuse_mountpoint (f));
int fd = xopen (path, O_RDWR, 0600);
free (path);
test_with_bits (fd, 0);
/* POSIX requires that the extra bits are ignored. */
test_with_bits (fd, S_IFREG);
test_with_bits (fd, S_IFDIR);
test_with_bits (fd, ~07777);
xclose (fd);
support_fuse_unmount (f);
return 0;
}
#include <support/test-driver.c>