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+#!@@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
+}