From dcdcba79c7f50c948ea24e7b59e514144752bc75 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Tue, 24 Apr 2012 17:29:15 -0400
Subject: Write a messages library.

---
diff --git a/lib/Makefile.in b/lib/Makefile.in
index 711eee1..4e9ecdf 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -28,7 +28,7 @@ LIBDIR = @libdir@
 .SUFFIXES:
 .SUFFIXES: .sh
 
-SRCS = controlfields.sh architecture.sh archive.sh
+SRCS = controlfields.sh architecture.sh archive.sh messages.sh
 OBJS = $(SRCS:.sh=)
 
 PACKAGE = @package@
diff --git a/lib/messages.sh b/lib/messages.sh
new file mode 100644
index 0000000..e476954
--- /dev/null
+++ b/lib/messages.sh
@@ -0,0 +1,65 @@
+#!@@SHELL@@
+#
+# opkhelper
+# lib/messages
+# Functions for printing error and warning messages.
+#
+# Copyright (C) 2012 Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Prints an error message and exits.
+# Parameters:
+#   message
+# Output:
+#   message
+# Return value:
+#   none
+oh_error()
+{
+	printf '%s: Error: ' "${0##*/}"
+	printf "${@}"
+	printf '\n'
+	exit 1
+}
+
+# Prints a warning message.
+# Parameters:
+#   message
+# Output:
+#   message
+# Return value:
+#   0
+oh_warn()
+{
+	printf '%s: Warning: ' "${0##*/}"
+	printf "${@}"
+	printf '\n'
+	return 0
+}
+
+# Prints an informational message.
+# Parameters:
+#   message
+# Output:
+#   message
+# Return value:
+#   0
+oh_info()
+{
+	printf '%s: ' "${0##*/}"
+	printf "${@}"
+	printf '\n'
+	return 0
+}
--
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