147 lines
4.6 KiB
Diff
147 lines
4.6 KiB
Diff
commit f4ae345810942db891bddf9b482c72b3a120c3b2
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Thu Aug 29 11:06:08 2024 +0200
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io: Add tst-lstat-nofollow, tst-lstat-nofollow-time64
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They verify that lstat, lstat64 do not follow symbolic links.
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Reviewed-by: DJ Delorie <dj@redhat.com>
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Conflicts:
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io/Makefile (new test added)
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diff --git a/io/Makefile b/io/Makefile
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index cc78a438a8898ae3..05e6b798d669d1b1 100644
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--- a/io/Makefile
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+++ b/io/Makefile
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@@ -81,7 +81,8 @@ tests := test-utime test-stat test-stat2 test-lfs tst-getcwd \
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tst-closefrom \
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tst-ftw-bz28126 \
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tst-fchmod-errors \
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- tst-fchmod-fuse
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+ tst-fchmod-fuse \
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+ tst-lstat-nofollow \
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tests-time64 := \
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tst-fcntl-time64 \
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@@ -90,6 +91,7 @@ tests-time64 := \
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tst-futimes-time64\
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tst-futimesat-time64 \
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tst-lchmod-time64 \
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+ tst-lstat-nofollow-time64 \
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tst-lutimes-time64 \
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tst-stat-time64 \
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tst-utime-time64 \
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diff --git a/io/tst-lstat-nofollow-time64.c b/io/tst-lstat-nofollow-time64.c
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new file mode 100644
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index 0000000000000000..45feb3f13085ae44
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--- /dev/null
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+++ b/io/tst-lstat-nofollow-time64.c
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@@ -0,0 +1 @@
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+#include "tst-lstat-nofollow.c"
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diff --git a/io/tst-lstat-nofollow.c b/io/tst-lstat-nofollow.c
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new file mode 100644
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index 0000000000000000..5bbb557c72938a8a
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--- /dev/null
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+++ b/io/tst-lstat-nofollow.c
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@@ -0,0 +1,98 @@
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+/* Test that lstat does not follow symbolic links.
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+ Copyright (C) 2024 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <string.h>
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+#include <support/check.h>
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+#include <support/fuse.h>
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+#include <support/support.h>
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+#include <sys/stat.h>
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+#include <unistd.h>
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+
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+static void
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+fuse_thread (struct support_fuse *f, void *closure)
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+{
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+ struct fuse_in_header *inh;
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+ while ((inh = support_fuse_next (f)) != NULL)
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+ {
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+ if (support_fuse_handle_mountpoint (f)
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+ || (inh->nodeid == 1 && support_fuse_handle_directory (f)))
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+ continue;
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+ switch (inh->opcode)
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+ {
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+ case FUSE_LOOKUP:
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+ {
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+ TEST_COMPARE (inh->nodeid, 1);
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+ TEST_COMPARE_STRING (support_fuse_cast (LOOKUP, inh), "symlink");
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+ struct fuse_entry_out *out = support_fuse_prepare_entry (f, 2);
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+ out->attr.mode = S_IFLNK | 0777;
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+ out->attr.size = strlen ("target");
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+ support_fuse_reply_prepared (f);
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+ }
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+ break;
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+ case FUSE_GETATTR:
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+ {
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+ TEST_COMPARE (inh->nodeid, 2);
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+ struct fuse_attr_out *out = support_fuse_prepare_attr (f);
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+ out->attr.mode = S_IFLNK | 0777;
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+ out->attr.size = strlen ("target");
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+ support_fuse_reply_prepared (f);
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+ }
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+ break;
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+ case FUSE_READLINK:
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+ /* The lstat operation must not attempt to look at the
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+ symbolic link target. */
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+ FAIL ("attempt to obtain target of symblic link for node %llu",
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+ (unsigned long long int) inh->nodeid);
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+ break;
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+ default:
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+ FAIL ("unexpected event %s", support_fuse_opcode (inh->opcode));
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+ }
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+ }
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+}
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+
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+static int
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+do_test (void)
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+{
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+ support_fuse_init ();
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+ struct support_fuse *f = support_fuse_mount (fuse_thread, NULL);
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+ char *symlink_path = xasprintf ("%s/symlink", support_fuse_mountpoint (f));
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+
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+ {
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+ struct stat st = { 0, };
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+ TEST_COMPARE (lstat (symlink_path, &st), 0);
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+ TEST_COMPARE (st.st_uid, getuid ());
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+ TEST_COMPARE (st.st_gid, getgid ());
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+ TEST_COMPARE (st.st_size, 6);
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+ TEST_COMPARE (st.st_mode, S_IFLNK | 0777);
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+ }
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+
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+ {
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+ struct stat64 st = { 0, };
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+ TEST_COMPARE (lstat64 (symlink_path, &st), 0);
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+ TEST_COMPARE (st.st_uid, getuid ());
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+ TEST_COMPARE (st.st_gid, getgid ());
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+ TEST_COMPARE (st.st_size, 6);
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+ TEST_COMPARE (st.st_mode, S_IFLNK | 0777);
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+ }
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+
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+ free (symlink_path);
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+ support_fuse_unmount (f);
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+ return 0;
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+}
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+
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+#include <support/test-driver.c>
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