Imported Upstream version 6.8.0.73

Former-commit-id: d18deab1b47cfd3ad8cba82b3f37d00eec2170af

external/corefx/src/Native/Unix/Common/pal_config.h.in

@@ -16,6 +16,8 @@
 #cmakedefine01 HAVE_STAT_TIMESPEC
 #cmakedefine01 HAVE_STAT_TIM
 #cmakedefine01 HAVE_STAT_NSEC
+#cmakedefine01 HAVE_STAT_FLAGS
+#cmakedefine01 HAVE_LCHFLAGS
 #cmakedefine01 HAVE_GNU_STRERROR_R
 #cmakedefine01 HAVE_READDIR_R
 #cmakedefine01 HAVE_DIRENT_NAME_LEN

external/corefx/src/Native/Unix/System.Native/pal_io.c

@@ -166,6 +166,12 @@ static void ConvertFileStatus(const struct stat_* src, struct FileStatus* dst)
     dst->BirthTime = 0;
     dst->BirthTimeNsec = 0;
 #endif
+
+#if defined(HAVE_STAT_FLAGS) && defined(UF_HIDDEN)
+    dst->UserFlags = ((src->st_flags & UF_HIDDEN) == UF_HIDDEN) ? PAL_UF_HIDDEN : 0;
+#else
+    dst->UserFlags = 0;
+#endif
 }
 
 // CoreCLR expects the "2" suffixes on these: they should be cleaned up in our
@@ -1460,6 +1466,28 @@ int32_t SystemNative_LockFileRegion(intptr_t fd, int64_t offset, int64_t length,
     return ret;
 }
 
+int32_t SystemNative_LChflags(const char* path, uint32_t flags)
+{
+#if HAVE_LCHFLAGS
+    int32_t result;
+    while ((result = lchflags(path, flags)) < 0 && errno == EINTR);
+    return result;
+#else
+    (void)path, (void)flags;
+    errno = ENOTSUP;
+    return -1;
+#endif
+}
+
+int32_t SystemNative_LChflagsCanSetHiddenFlag(void)
+{
+#if defined(UF_HIDDEN) && defined(HAVE_STAT_FLAGS) && defined(HAVE_LCHFLAGS)
+    return true;
+#else
+    return false;
+#endif
+}
+
 int32_t SystemNative_Symlink(const char* target, const char* linkPath)
 {
     return symlink(target, linkPath);

external/corefx/src/Native/Unix/System.Native/pal_io.h

@@ -35,6 +35,7 @@ struct FileStatus
     int64_t BirthTimeNsec; // nanosecond part
     int64_t Dev;       // ID of the device containing the file
     int64_t Ino;       // inode number of the file
+    uint32_t UserFlags; // user defined flags
 };
 
 /* Provide consistent access to nanosecond fields, if they exist. */
@@ -153,6 +154,14 @@ enum
     FILESTATUS_FLAGS_HAS_BIRTHTIME = 1,
 };
 
+/**
+ * Constants for interpreting FileStatus.UserFlags.
+ */
+enum
+{
+    PAL_UF_HIDDEN = 0x8000
+};
+
 /**
  * Constants from dirent.h for the inode type returned from readdir variants
  */
@@ -750,6 +759,20 @@ DLLEXPORT int32_t SystemNative_GetPeerID(intptr_t socket, uid_t* euid);
 */
 DLLEXPORT int32_t SystemNative_LockFileRegion(intptr_t fd, int64_t offset, int64_t length, int16_t lockType);
 
+/**
+* Changes the file flags of the file whose location is specified in path
+*
+* Returns 0 for success, -1 for failure. Sets errno for failure.
+*/
+DLLEXPORT int32_t SystemNative_LChflags(const char* path, uint32_t flags);
+
+/**
+ * Determines if the current platform supports setting UF_HIDDEN (0x8000) flag
+ *
+ * Returns true (non-zero) if supported, false (zero) if not.
+ */
+DLLEXPORT int32_t SystemNative_LChflagsCanSetHiddenFlag(void);
+
 /**
 * Creates a symbolic link at "linkPath", pointing at "target".
 * "target" may or may not exist (dangling symbolic links are valid filesystem objects)