2." />

一起学习网 一起学习网


perl的logwrapper使用实例代码

网络编程 perl的logwrapper使用实例代码 06-21

这里为大家举二个小例子,供朋友们学习参考。

对任何的函数记录函数运行的时间。


#!/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 $REPORTLOG "result:$retn";
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";

若需要调用外部命令,则需要如下:


#!/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 (<PH>) {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;

Perl中处理时间的几个函数
1、time函数:返回从1970年1月1日起累计的秒数使用:my$t=time();2、localtime函数:获取本地时区时间使用:my$t=localtime(time());3、gmtime函数:获取格林威治时

perl上下文介绍
my$para=@_这是标量上下文,$para得到的是@_中元素的个数。my($para)=@_这是列表上下文,$para得到的是@_中的元素值。具体是什么上下文是由等号左边的变量

perl的INC设置分析
1)默认的INC如下:@INC:C:/Perl/site/libC:/Perl/lib2)设置环境变量PERL5LIB来增加到INC,例如:setperl5lib=c:perllibs在设置perl5lib后如下,%ENV:PERL5LIB="c:perllibs"@INC:c:


编辑:一起学习网

标签:函数,上下文,的是,这是,格林威治