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pgbackrest/lib/BackRest/FileCommon.pm
David Steele 048571e23f Closed #173: Add static source code analysis
Perl Critic added and passes on gentle.  A policy file has been created with some permanent exceptions and a list of policies to be fixed in approximately the order they should be fixed in.
2016-02-23 09:25:22 -05:00

168 lines
5.1 KiB
Perl

####################################################################################################################################
# FILE COMMON MODULE
####################################################################################################################################
package BackRest::FileCommon;
use strict;
use warnings FATAL => qw(all);
use Carp qw(confess);
use Exporter qw(import);
our @EXPORT = qw();
use Fcntl qw(:mode :flock O_RDONLY O_WRONLY O_CREAT O_TRUNC);
use File::Basename qw(dirname);
use IO::Handle;
use lib dirname($0) . '/../lib';
use BackRest::Common::Exception;
use BackRest::Common::Log;
####################################################################################################################################
# Operation constants
####################################################################################################################################
use constant OP_FILE_COMMON => 'FileCommon';
use constant OP_FILE_COMMON_PATH_SYNC => OP_FILE_COMMON . '::filePathSync';
use constant OP_FILE_COMMON_STRING_READ => OP_FILE_COMMON . '::fileStringRead';
use constant OP_FILE_COMMON_STRING_WRITE => OP_FILE_COMMON . '::fileStringWrite';
####################################################################################################################################
# filePathSync
#
# Sync a directory.
####################################################################################################################################
sub filePathSync
{
# Assign function parameters, defaults, and log debug info
my
(
$strOperation,
$strPath
) =
logDebugParam
(
OP_FILE_COMMON_PATH_SYNC, \@_,
{name => 'strPath', trace => true}
);
open(my $hPath, "<", $strPath)
or confess &log(ERROR, "unable to open ${strPath}", ERROR_PATH_OPEN);
open(my $hPathDup, ">&", $hPath)
or confess &log(ERROR, "unable to duplicate handle for ${strPath}", ERROR_PATH_OPEN);
$hPathDup->sync
or confess &log(ERROR, "unable to sync ${strPath}", ERROR_PATH_SYNC);
# Return from function and log return values if any
return logDebugReturn
(
$strOperation
);
}
push @EXPORT, qw(filePathSync);
####################################################################################################################################
# fileStringRead
#
# Read the specified file as a string.
####################################################################################################################################
sub fileStringRead
{
# Assign function parameters, defaults, and log debug info
my
(
$strOperation,
$strFileName
) =
logDebugParam
(
OP_FILE_COMMON_STRING_READ, \@_,
{name => 'strFileName', trace => true}
);
# Open the file for writing
sysopen(my $hFile, $strFileName, O_RDONLY)
or confess &log(ERROR, "unable to open ${strFileName}");
# Read the string
my $iBytesRead;
my $iBytesTotal = 0;
my $strContent;
do
{
$iBytesRead = sysread($hFile, $strContent, 65536, $iBytesTotal);
if (!defined($iBytesRead))
{
confess &log(ERROR, "unable to read string from ${strFileName}: $!", ERROR_FILE_READ);
}
$iBytesTotal += $iBytesRead;
}
while ($iBytesRead != 0);
close($hFile);
# Return from function and log return values if any
return logDebugReturn
(
$strOperation,
{name => 'strContent', value => $strContent, trace => true}
);
}
push @EXPORT, qw(fileStringRead);
####################################################################################################################################
# fileStringWrite
#
# Write a string to the specified file.
####################################################################################################################################
sub fileStringWrite
{
# Assign function parameters, defaults, and log debug info
my
(
$strOperation,
$strFileName,
$strContent,
$bSync
) =
logDebugParam
(
OP_FILE_COMMON_STRING_WRITE, \@_,
{name => 'strFileName', trace => true},
{name => 'strContent', trace => true},
{name => 'bSync', default => true, trace => true},
);
# Open the file for writing
sysopen(my $hFile, $strFileName, O_WRONLY | O_CREAT | O_TRUNC, oct(640))
or confess &log(ERROR, "unable to open ${strFileName}");
# Write the string
syswrite($hFile, $strContent)
or confess &log(ERROR, "unable to write string to ${strFileName}: $!", ERROR_FILE_WRITE);
# Sync file
$hFile->sync() if $bSync;
# Close file
close($hFile);
# Sync directory
filePathSync(dirname($strFileName)) if $bSync;
# Return from function and log return values if any
return logDebugReturn
(
$strOperation
);
}
push @EXPORT, qw(fileStringWrite);
1;