Current File : //usr/share/mysql-test/lib/My/Exec.pm
# -*- cperl -*-
package My::Exec;
use strict;
use warnings;
use Carp;
use File::Basename;
use IO::File;
use base qw(Exporter);
our @EXPORT= qw(exec_print_on_error);
# Generate a logfile name from a command
sub get_logfile_name {
my $cmd = shift;
# Get logfile name
my @cmd_parts = split(' ', $cmd);
my $logfile_base = fileparse($cmd_parts[0]);
my $logfile_name = "";
my $log_dir = $ENV{MYSQLTEST_VARDIR};
for my $i (1..100)
{
my $proposed_logfile_name = "$log_dir/$logfile_base" . '_' . $i . ".log";
if (! -f $proposed_logfile_name)
{
# We can use this file name
$logfile_name = $proposed_logfile_name;
last;
}
}
return $logfile_name;
}
# Save a set of lines to a file
sub save_file {
my $filename = shift;
my $lines = shift;
my $F = IO::File->new($filename, "w") or die "Can't write to '$filename': $!";
foreach my $line (@$lines) {
print $F $line
}
$F->close();
}
#
# exec_print_on_error - executes command, and prints n last lines of output
# from the command only if the command fails. If the command runs
# successfully, no output is written.
#
# Parameters:
# cmd - the command to run
# max_lines - the maximum number of lines of output to show on error (default 200)
# Returns:
# 1 on success, 0 on error.
# Example:
# use My::Exec;
# my $res = exec_print_on_error("./mtr --suite=ndb ndb_dd_varsize");
#
sub exec_print_on_error {
my $cmd = shift;
my $max_lines = shift || 200;
my $logfile_name = get_logfile_name($cmd);
$cmd .= " 2>&1";
my @output = `$cmd`;
print "Result of '$cmd': $?, logfile: '$logfile_name'\n";
save_file($logfile_name, \@output);
if ($? == 0)
{
# Test program suceeded
return 1;
}
# Test program failed
if ($? == -1)
{
# Failed to execute program
print "Failed to execute '$cmd': $!\n";
}
elsif ($?)
{
# Test program failed
my $sig = $? & 127;
my $return = $? >> 8;
print "Command that failed: '$cmd'\n";
print "Test program killed by signal $sig\n" if $sig;
print "Test program failed with error $return\n" if $return;
# Show the last lines of the output
my $lines = scalar(@output);
$lines = $max_lines if $lines > $max_lines;
print "Last '$lines' lines of output from command:\n";
foreach my $line (splice(@output, -$lines))
{
print $line;
}
}
return 0;
}
Mini Shell