?? fig11_02.pl
字號:
#!/usr/bin/perl
# Fig. 11.2: fig11_02.pl
# A program that uses file tests
use strict;
use warnings;
foreach my $file ( @ARGV ) {
print( "Checking $file: " );
if ( -e $file ) { # does file exist?
print( "$file exists!\n" );
if ( -f $file ) { # is the file a plain file?
print( "The file $file is:" );
print( " executable" ) if ( -x $file ); # executable?
print( " readable" ) if ( -r $file ); # readable?
print( " writable" ) if ( -w $file ); # writable?
print( "\n" );
print( "It is ", -s $file, " bytes.\n" ); # size
my @time = timeconv( -A $file ); # accessed
print( "Last accessed at $time[0] days, ",
"$time[1] hours, $time[2] minutes ",
"and $time[3] seconds.\n" );
@time = timeconv( -M $file ); # modified
print( "Last modified at $time[0] days, ",
"$time[1] hours, $time[2] minutes, ",
"and $time[3] seconds ago.\n" );
}
elsif ( -d $file ) { # is it a directory?
print( "$file is a directory!\n" );
}
}
else {
print( "$file doesn't exist.\n" );
}
print( "\n" );
}
sub timeconv
{
my $time = shift();
my $days = int( $time );
$time = ( $time - $days ) * 24;
my $hours = int( $time );
$time = ( $time - $hours ) * 60;
my $minutes = int( $time );
$time = ( $time - $minutes ) * 60;
my $seconds = int( $time );
return ( $days, $hours, $minutes, $seconds );
}
###########################################################################
# (C) Copyright 2001 by Deitel & Associates, Inc. and Prentice Hall. #
# All Rights Reserved. #
# #
# DISCLAIMER: The authors and publisher of this book have used their #
# best efforts in preparing the book. These efforts include the #
# development, research, and testing of the theories and programs #
# to determine their effectiveness. The authors and publisher make #
# no warranty of any kind, expressed or implied, with regard to these #
# programs or to the documentation contained in these books. The authors #
# and publisher shall not be liable in any event for incidental or #
# consequential damages in connection with, or arising out of, the #
# furnishing, performance, or use of these programs. #
###########################################################################
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -