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D61236.1794688115.diff
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diff --git a/tests/sys/fs/fdescfs/fdescfs_test.c b/tests/sys/fs/fdescfs/fdescfs_test.c
--- a/tests/sys/fs/fdescfs/fdescfs_test.c
+++ b/tests/sys/fs/fdescfs/fdescfs_test.c
@@ -516,6 +516,77 @@
ATF_REQUIRE_EQ(0, unmount("mnt", 0));
}
+#define TEXT "Hello, world!\n"
+#define LEN 14
+
+FDESCFS_TC(truncate_ro,
+ "disallow truncating read-only files (plain)");
+ATF_TC_BODY(truncate_ro, tc)
+{
+ struct stat sb;
+ char fd_path[16];
+ int fd;
+
+ /* create read-only target file */
+ ATF_REQUIRE((fd = open("file", O_RDWR | O_CREAT, 0400)) >= 0);
+ ATF_REQUIRE_EQ(LEN, write(fd, TEXT, LEN));
+ ATF_REQUIRE_EQ(0, close(fd));
+
+ /* reopen the file read-only */
+ ATF_REQUIRE((fd = open("file", O_RDONLY)) >= 0);
+
+ /* mount fdescfs */
+ mount_fdescfs(NULL);
+
+ /* construct and stat path */
+ snprintf(fd_path, sizeof(fd_path), "mnt/%d", fd);
+ ATF_REQUIRE_EQ(0, stat(fd_path, &sb));
+ ATF_CHECK_EQ(S_IFCHR, sb.st_mode & S_IFMT);
+ ATF_CHECK_EQ(0555, sb.st_mode & ALLPERMS);
+ ATF_CHECK_EQ(0, sb.st_size);
+
+ /* attempt to truncate */
+ ATF_CHECK(truncate(fd_path, 0) < 0);
+ ATF_CHECK_EQ(LEN, lseek(fd, 0, SEEK_END));
+
+ /* done */
+ ATF_CHECK_EQ(0, close(fd));
+}
+
+FDESCFS_TC(nodup_truncate_ro,
+ "allow truncating read-only files (nodup)");
+ATF_TC_BODY(nodup_truncate_ro, tc)
+{
+ struct stat sb;
+ char fd_path[16];
+ int fd;
+
+ /* create read-only target file */
+ ATF_REQUIRE((fd = open("file", O_RDWR | O_CREAT, 0400)) >= 0);
+ ATF_REQUIRE_EQ(LEN, write(fd, TEXT, LEN));
+ ATF_REQUIRE_EQ(0, close(fd));
+
+ /* reopen the file read-only */
+ ATF_REQUIRE((fd = open("file", O_RDONLY)) >= 0);
+
+ /* mount fdescfs */
+ mount_fdescfs(nodup);
+
+ /* construct and stat path */
+ snprintf(fd_path, sizeof(fd_path), "mnt/%d", fd);
+ ATF_REQUIRE_EQ(0, stat(fd_path, &sb));
+ ATF_CHECK_EQ(S_IFREG, sb.st_mode & S_IFMT);
+ ATF_CHECK_EQ(0400, sb.st_mode & ALLPERMS);
+ ATF_CHECK_EQ(LEN, sb.st_size);
+
+ /* attempt to truncate */
+ ATF_CHECK(truncate(fd_path, LEN / 2) == 0);
+ ATF_CHECK_EQ(LEN / 2, lseek(fd, 0, SEEK_END));
+
+ /* done */
+ ATF_CHECK_EQ(0, close(fd));
+}
+
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, traverse_dir);
@@ -535,5 +606,7 @@
ATF_TP_ADD_TC(tp, ioctl_caps);
ATF_TP_ADD_TC(tp, nodup_ioctl_caps);
ATF_TP_ADD_TC(tp, nodup_ioctl_cap_intersection);
+ ATF_TP_ADD_TC(tp, truncate_ro);
+ ATF_TP_ADD_TC(tp, nodup_truncate_ro);
return (atf_no_error());
}

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