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package Functions::Setup;
####################################################
# Here will be stored all the functions needed to setup the environment
# for the daemon
####################################################
use strict;
use warnings;
use Fcntl ':mode';
use Functions::Shell qw(check_daemon);
# The next line is here to help me find the directory of the script
# if you have a better method, let me know.
use FindBin qw($Bin);
# Next lines are needed to export subroutines to the main package
use base 'Exporter';
use vars qw/ @EXPORT_OK /;
@EXPORT_OK = qw(setup fixperm);
sub setup {
if (!Functions::Shell::check_daemon()){
print "You will need to be in the sudoers file to complete the setup process. Are you? [N,y]";
my $answer = <STDIN>;
my $compile_success = compile_wrapper();
my $user_added = create_user();
my $wrapper_chown = chown_wrapper();
my $wrapper_setuid = setuid_wrapper();
my $log_folder = create_log_folder();
my $add_to_sudoers = add_to_sudoers();
print "\n";
print '_' x 80 . "\n";
print "Setup complete. Run 'fixperm' to be sure all permission are set correctly.\n";
print "You can type 'help fixperm' to show what this command does.\n";
print '_' x 80 . "\n";
}
else {
print "The daemon is running. Can't run setup while the daemon is running.\nStop it and retry.\n";
}
}
# This function will try to compile the c wrapper for the script. It will return 1 on success and 0 on failure.
sub compile_wrapper {
if (-e '/usr/bin/gcc') {
print "Compiling the wrapper... \n";
my $compile = system("/usr/bin/gcc -o $Bin/cvmfs-testdwrapper $Bin/cvmfs-testdwrapper.c");
if ($compile == -1){
print "FAILED: $!\n";
return 0;
}
else {
print ("Done.\n");
return 1;
}
}
else {
print "It seems you don't have gcc installed on your system. Install it and retry.\n";
return 0;
}
}
# This function will try to create a new user for the daemon, return 1 on success and 0 on failure
sub create_user {
# Checking if the user exists in the system
my $user = `cat /etc/passwd | grep cvmfs-test`;
# If it doesn't, create it
if (!$user) {
if (-e '/usr/sbin/useradd') {
print "Adding user 'cvmfs-test'.\n";
my $added = system('sudo /usr/sbin/useradd -r --key UMASK=0000 cvmfs-test');
if ($added == -1) {
print "FAILED: $!\n";
return 0;
}
else {
print "User 'cvmfs-test' added.\n";
return 1;
}
}
else {
print "It seems you don't have useradd on your system. Install it and retry.\n";
return 0;
}
}
else {
print "User already present on the system.\n";
return 1;
}
}
# This function will check if the wrapper is owned by the user cvmfs-test, return 1 on success and 0 on failure
sub chown_wrapper {
# Checking if the user own the daemon wrapper
my $uid = (stat("$Bin/cvmfs-testdwrapper"))[4];
my $owner = (getpwuid($uid))[0];
if($owner ne 'root') {
print "Changing the owner of the wrapper... \n";
my $chowned = system("sudo chown root:root $Bin/cvmfs-testdwrapper");
if ($chowned == -1){
print "FAILED: $!\n";
return 0;
}
else {
print "Done.\n";
return 1;
}
}
else {
print "Wrapper already owned by cvmfs-test.\n";
return 1;
}
}
# This function will add the setuid byte to wrapper permission
sub setuid_wrapper {
# Checking if the file has the setuid bit
my $mode = (stat("$Bin/cvmfs-testdwrapper"))[2];
my $suid = $mode & S_ISUID;
if($suid) {
print "setuid byte already set on the wrapper.\n";
return 1;
}
else {
print "Adding setuid byte... \n";
my $setuid = system("sudo chmod u+s $Bin/cvmfs-testdwrapper");
if ($setuid == -1){
print "FAILED: $!\n";
return 0;
}
else {
print "Done.\n";
return 1;
}
}
}
# This function will set all permission for files and directories
sub fixperm {
print 'Setting permission for modules to 644... ';
system("find -type f -name \"*.pm\" -exec chmod 644 {} +");
print "Done.\n";
print 'Setting permission for executables to 755... ';
system("find -type f -name \"*.pl\" -exec chmod 755 {} +");
print "Done.\n";
print 'Setting permission for directories to 755... ';
system("find -type d -exec chmod 755 {} +");
print "Done.\n";
print 'Setting permission for help files to 644... ';
system("find -type f -name \"*help\" -exec chmod 644 {} +");
print "Done.\n";
print 'Setting permission for bash script to 755...';
system("find -type f -name \"*.sh\" -exec chmod 755 {} +");
print "Done.\n";
}
sub create_log_folder {
unless( -e '/var/log/cvmfs-test' ) {
print 'Creating /var/log/cvmfs-test... ';
system("sudo mkdir -p /var/log/cvmfs-test");
print "Done.\n";
}
else {
print "Log folder already present on the system.\n";
}
my $uid = (stat('/var/log/cvmfs-test'))[4];
my $owner = (getpwuid($uid))[0];
unless ($uid eq 'cvmfs-test') {
print 'Setting owner and permission on the log folder...';
system("sudo chown cvmfs-test /var/log/cvmfs-test");
system("sudo chmod 777 /var/log/cvmfs-test");
print "Done.\n";
}
else {
print "Log folder already owned by user cvmfs-test.\n";
}
}
sub add_to_sudoers {
my $sudoers = `sudo cat /etc/sudoers | grep "cvmfs-test ALL=(ALL) NOPASSWD: ALL"`;
if ($sudoers) {
print "User cvmfs-test is already in the /etc/sudoers file.\n";
}
else {
print 'Adding cvmfs-test to the /etc/sudoers file...';
system ('sudo sh -c "echo \"cvmfs-test ALL=(ALL) NOPASSWD: ALL\" >> /etc/sudoers"');
print "Done.\n";
}
}
1;
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