Initial import of javavmwrapper - a simple shell script which would allow

Java-based ports to use any of the Java Virtual Machines installed on the
system.

1 files changed, 120 insertions, 0 deletions

diff --git a/java/javavmwrapper/src/javavmwrapper.sh b/java/javavmwrapper/src/javavmwrapper.sh
new file mode 100644
index 000000000000..5507efe3cbc1
--- /dev/null
+++ b/java/javavmwrapper/src/javavmwrapper.sh
@@ -0,0 +1,120 @@
+#!/bin/sh
+#
+# javawrapper.sh
+#
+# Allows to install several Java Virtual Machines
+# on the same system and use config file/or environment
+# variable to select wichever to use
+#
+# ----------------------------------------------------------------------------
+# "THE BEER-WARE LICENSE" (Revision 42, (c) Poul-Henning Kamp):
+# Maxim Sobolev <sobomax@FreeBSD.org> wrote this file.  As long as you retain
+# this notice you can do whatever you want with this stuff. If we meet some
+# day, and you think this stuff is worth it, you can buy me a beer in return.
+#
+# Maxim Sobolev
+# ----------------------------------------------------------------------------
+#
+# $FreeBSD$
+#
+# MAINTAINER= sobomax@FreeBSD.org
+
+ARGS="${*}"
+PREFIX="%%PREFIX%%"
+CONF="${PREFIX}/etc/javavms"
+IAM=`basename "${0}"`
+
+tryrunVM () {
+    if [ -x "${1}" ]; then
+        exec "${1}" ${2}
+    fi
+
+    /bin/echo "${IAM}: warning: couldn't start specified JavaVM - \"${1}\"" >&2
+}
+
+registerVM () {
+    if [ x"${1}" = x"" ]; then
+       /bin/echo "Usage: ${IAM} path"
+       exit
+    fi
+
+    if [ ! -e "${CONF}" ]; then
+       /usr/bin/touch "${CONF}"
+    fi
+
+    if [ ! -x "${1}" ]; then
+        /bin/echo "${IAM}: warning: the specified JavaVM \"${1}\" either not exists of not executable" >&2
+    fi
+
+    /bin/ed "${CONF}" >/dev/null <<EOF
+0a
+${1}
+.
+w
+q
+EOF
+    exit 0
+}
+
+unregisterVM () {
+    if [ x"${1}" = x"" ]; then
+       /bin/echo "Usage: ${IAM} path"
+       exit
+    fi
+
+    if [ ! -e "${CONF}" ]; then
+       /bin/echo "${IAM}: error: can't find ${CONF} config file!" >&2
+       exit 1
+    fi
+
+    if [ x"`grep ${1} ${CONF}`" = x"" ]; then
+        /bin/echo "${IAM}: error: \"${1}\" JavaVM is not currently registered"
+        exit 1
+    fi
+
+    /bin/ed "${CONF}" >/dev/null <<EOF
+g|${1}|d
+w
+q
+EOF
+
+    # Remove config file if its size reached 0
+    if [ ! -s "${CONF}" ]; then
+        /bin/rm "${CONF}"
+    fi
+
+    exit 0
+}
+
+case "${IAM}" in
+    registervm )
+        registerVM "${1}"
+        ;;
+    unregistervm )
+        unregisterVM "${1}"
+        ;;
+esac
+
+# Main ()
+
+# First check if JAVAVM environment variable is set
+if [ x"${JAVAVM}" != x"" ]; then
+    tryrunVM "${JAVAVM}" "${ARGS}"
+fi
+
+# Then try to make sure that ${CONF} exists
+if [ ! -e "${CONF}" ]; then
+    echo "${IAM}: error: can't find ${CONF} config file" >&2
+    exit 1
+fi
+
+# Allow coment in the ${CONF}
+VMS=`/usr/bin/sed 's|#.*||' < "${CONF}" | uniq`
+
+# Finally try to run one of the ${VMS}
+for JAVAVM in ${VMS}; do
+    tryrunVM "${JAVAVM}" "${ARGS}";
+done
+
+echo "${IAM}: error: no suitable JavaVMs found" >&2
+exit 1
\ No newline at end of file