#!/bin/sh
# Install a linuxkmsgd service directory.

cleanup () {
	rm -f $$groupof $$groupof.c
}
die () {
	echo >&2 $1
	cleanup
	exit 21
}
_mkdir () {
	mkdir $1 || die "Unable to make directory $1"
}
_chmod () {
	chmod $1 $2 || die "Unable to change mode of $2 to $1"
}
_chowngrp () {
	chown $1 $3 || die "Unable to set owner of $3 to $1"
	chgrp $2 $3 || die "Unable to set group of $3 to $1"
}
_cd () {
	cd $1 || die "Unable to change to $1"
}
_touch () {
	touch $1 || die "Unable to touch $1"
}

if [ $# -lt 3 ] ; then
	echo Usage: mkservice account logaccount servicedir
	echo e.g. mkservice root kernellog /etc/linuxkmsgd
	exit 20
fi

cat >$$groupof.c <<EOF
#include <sys/types.h>
#include <stdio.h>
#include <pwd.h>
struct passwd *pw;
int main(int argc, char **argv) {
	if (argc != 2) exit(20);
	pw = getpwnam(argv[1]);
	if (!pw) exit(21);
	printf("%d\n", pw->pw_gid);
	exit(0);
}
EOF
cc -o $$groupof $$groupof.c || die "Unable to compile groupof program"

user=$1
grp=`./$$groupof $user` || die "Unable to get group of $user"
loguser=$2
loggrp=`./$$groupof $loguser` || die "Unable to get group of $loguser"
dir=$3

_mkdir $dir
_chmod 03700 $dir
_cd $dir
_mkdir log
_chmod 02755 log
_mkdir log/main
_chowngrp $loguser $loggrp log/main
_chmod 02755 log/main
_touch log/main/status
_chowngrp $loguser $loggrp log/main/status
_chmod 0644 log/main/status
_touch run
_chmod 0644 run
cat >run <<EOF
#!/bin/sh
exec 2>&1
exec setuidgid $user #some command#
EOF
_chmod 0755 run
_touch log/run
_chmod 0644 log/run
cat >log/run <<EOF
#!/bin/sh
exec setuidgid $loguser multilog t ./main
EOF
_chmod 0755 log/run

cleanup