o To support new EA interface with explicit namespaces, introduce two

  utility functions which convert between string namespace names and
  numeric constants used by the interface.  Right now, two namespaces
  are supported, EXTATTR_NAMESPACE_SYSTEM ("system") and
  EXTATTR_NAMESPACE_USER ("user").  These functions are used by
  various userland EA utilities, rather than hard coding the routines
  all over the place.

Obtained from:	TrustedBSD Project

3 files changed, 80 insertions, 3 deletions

diff --git a/lib/libutil/Makefile b/lib/libutil/Makefile
index 07db69abc443..2b7259c1bde6 100644
--- a/lib/libutil/Makefile
+++ b/lib/libutil/Makefile
@@ -6,9 +6,9 @@ SHLIB_MAJOR= 3
 SHLIB_MINOR= 0
 CFLAGS+=-Wall -DLIBC_SCCS -I${.CURDIR} -I${.CURDIR}/../../sys
 CFLAGS+=-DINET6
-SRCS=	_secure_path.c auth.c fparseln.c login.c login_auth.c login_cap.c \
-	login_class.c login_crypt.c login_ok.c login_times.c login_tty.c \
-	logout.c logwtmp.c property.c pty.c realhostname.c stub.c \
+SRCS=	_secure_path.c auth.c extattr.c fparseln.c login.c login_auth.c \
+	login_cap.c login_class.c login_crypt.c login_ok.c login_times.c \
+	login_tty.c logout.c logwtmp.c property.c pty.c realhostname.c stub.c \
 	trimdomain.c uucplock.c
 INCS=	libutil.h login_cap.h
 
diff --git a/lib/libutil/extattr.c b/lib/libutil/extattr.c
new file mode 100644
index 000000000000..1fcfdbbcdaf4
--- /dev/null
+++ b/lib/libutil/extattr.c
@@ -0,0 +1,75 @@
+/*-
+ * Copyright (c) 2001 Robert N. M. Watson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+/*
+ * TrustedBSD: Utility functions for extended attributes.
+ */
+
+#include <sys/types.h>
+#include <sys/extattr.h>
+
+#include <errno.h>
+#include <string.h>
+
+int
+extattr_namespace_to_string(int namespace, char **string)
+{
+
+	switch(namespace) {
+	case EXTATTR_NAMESPACE_USER:
+		if (*string != NULL)
+			*string = strdup(EXTATTR_NAMESPACE_USER_STRING);
+		return (0);
+
+	case EXTATTR_NAMESPACE_SYSTEM:
+		if (*string != NULL)
+			*string = strdup(EXTATTR_NAMESPACE_SYSTEM_STRING);
+		return (0);
+
+	default:
+		errno = EINVAL;
+		return (-1);
+	}
+}
+
+int
+extattr_string_to_namespace(const char *string, int *namespace)
+{
+
+	if (!strcmp(string, EXTATTR_NAMESPACE_USER_STRING)) {
+		if (namespace != NULL)
+			*namespace = EXTATTR_NAMESPACE_USER;
+		return (0);
+	} else if (!strcmp(string, EXTATTR_NAMESPACE_SYSTEM_STRING)) {
+		if (namespace != NULL)
+			*namespace = EXTATTR_NAMESPACE_SYSTEM;
+		return (0);
+	} else {
+		errno = EINVAL;
+		return (-1);
+	}
+}
diff --git a/lib/libutil/libutil.h b/lib/libutil/libutil.h
index 4125b1ac1cca..6bebea00b30f 100644
--- a/lib/libutil/libutil.h
+++ b/lib/libutil/libutil.h
@@ -48,6 +48,8 @@ struct utmp;
 struct in_addr;
 
 __BEGIN_DECLS
+int	extattr_namespace_to_string(int namespace, char **string);
+int	extattr_string_to_namespace(const char *string, int *namespace);
 void	login __P((struct utmp *_ut));
 int	login_tty __P((int _fd));
 int	logout __P((const char *_line));