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-rw-r--r--test/syscalls/linux/mknod.cc26
1 files changed, 24 insertions, 2 deletions
diff --git a/test/syscalls/linux/mknod.cc b/test/syscalls/linux/mknod.cc
index 4c45766c7..05dfb375a 100644
--- a/test/syscalls/linux/mknod.cc
+++ b/test/syscalls/linux/mknod.cc
@@ -15,6 +15,7 @@
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
+#include <sys/types.h>
#include <sys/un.h>
#include <unistd.h>
@@ -39,7 +40,28 @@ TEST(MknodTest, RegularFile) {
EXPECT_THAT(mknod(node1.c_str(), 0, 0), SyscallSucceeds());
}
-TEST(MknodTest, MknodAtRegularFile) {
+TEST(MknodTest, RegularFilePermissions) {
+ const std::string node = NewTempAbsPath();
+ mode_t newUmask = 0077;
+ umask(newUmask);
+
+ // Attempt to open file with mode 0777. Not specifying file type should create
+ // a regualar file.
+ mode_t perms = S_IRWXU | S_IRWXG | S_IRWXO;
+ EXPECT_THAT(mknod(node.c_str(), perms, 0), SyscallSucceeds());
+
+ // In the absence of a default ACL, the permissions of the created node are
+ // (mode & ~umask). -- mknod(2)
+ mode_t wantPerms = perms & ~newUmask;
+ struct stat st;
+ ASSERT_THAT(stat(node.c_str(), &st), SyscallSucceeds());
+ ASSERT_EQ(st.st_mode & 0777, wantPerms);
+
+ // "Zero file type is equivalent to type S_IFREG." - mknod(2)
+ ASSERT_EQ(st.st_mode & S_IFMT, S_IFREG);
+}
+
+TEST(MknodTest, MknodAtFIFO) {
const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
const std::string fifo_relpath = NewTempRelPath();
const std::string fifo = JoinPath(dir.path(), fifo_relpath);
@@ -72,7 +94,7 @@ TEST(MknodTest, MknodOnExistingPathFails) {
TEST(MknodTest, UnimplementedTypesReturnError) {
const std::string path = NewTempAbsPath();
- if (IsRunningOnGvisor()) {
+ if (IsRunningWithVFS1()) {
ASSERT_THAT(mknod(path.c_str(), S_IFSOCK, 0),
SyscallFailsWithErrno(EOPNOTSUPP));
}