perl logwrapper的应用

#!/usr/bin/perl
use warnings;
use strict;
no strict "refs";
sub testLogToStd{
	print "Test stdout : n";
	open LOG,"> 2.txt";
	select LOG;
	print "just a testn";
	#recover STDOUT
	select STDOUT;
	print "just a test2n";
	close LOG;
}
sub testFun{
	print "From testFunn";
	print STDERR "From TestFun Errorn";
}
sub testFun2{
	my $arg1 = shift;
	my $arg2 = shift;
	print "From testFun2n";
	print $arg1."n";
	print $arg2."n";
}
my $log_root = "log" if(! $3 ||$3 == "");
my $ret = system("mkdir $log_root") if(! -e $log_root);
my $report_log = "$log_root/report.log";
open my $REPORTLOG,">",$report_log or die "cannot not open log file report.logn";
sub logWrapper{
	my $log_root = shift;
	my $REPORTLOG  = shift;
	my $fun = shift;
	my @parameters = @_;
	*old_stdout = *STDOUT;
	*old_stderr = *STDERR;
	open LOG, ">","$log_root/$fun.log" or die "annot open log file $fun.n";
	*STDOUT = *LOG;
	*STDERR = *LOG;
	my $start = time;
	my $ret = &$fun(@parameters);
	my $end = time;
	*STDOUT = *old_stdout;
	*STDERR = *old_stderr;
	close LOG;
	my $duration = $end - $start;
	print $REPORTLOG "$funn";
	print $REPORTLOG "start:".localtime($start)."n";
	print $REPORTLOG "end:".localtime($end)."n";
	print $REPORTLOG "duration:".formatTimeDuration($duration)."n";
	print $REPORTLOG "result:$ret\n";
	print $REPORTLOG "n";
	print $REPORTLOG "n";
}
sub formatTimeDuration($){
	my $t = shift;
	my $hrs = int($t/3600);
	my $mins = int($t%3600/60);
	my $secs = int($t%3600%60);
	return "$hrs:$mins:$secs";
}
&logWrapper($log_root,$REPORTLOG,"testFun");
&logWrapper($log_root,$REPORTLOG,"testFun2","arg1","arg2");
print "thanksn";

#!/usr/bin/perl
use strict;
use warnings;
# run external commands
# redirect stdout and stderr
sub run_cmd{
	my $cmd = shift;
	my $pid = open(PH, "$cmd 2>&1 |");
	while () {print $_; }
}
open(FH, ">", "perl-test.log");
*old_stdout = *STDOUT;
*old_stderr = *STDERR;
*STDOUT = *FH;
*STDERR = *FH;
my $ret = undef;
$ret = readpipe("cp a b ");
$ret = system("cp a b");
$ret = `cp a b`;
run_cmd("cp a b");
print "AA";
print STDERR "BB";
*STDOUT = *old_stdout;
*STDERR = *old_stderr;