linux - 为什么不在 check_flexlm.pl 中检查/usr/local/bin/？来源包括

Question

即使我有 /usr/local/bin/lmstat，下面的脚本总是失败并显示 Cannot find "lmstat"。

谁能看出为什么会这样？

use strict;
use Getopt::Long;
use vars qw($opt_V $opt_h $opt_F $opt_t $verbose $PROGNAME);
use FindBin;
use lib "$FindBin::Bin";
use lib '/usr/lib64/nagios/plugins';
use utils qw(%ERRORS &print_revision &support &usage);

$PROGNAME="check_flexlm";

sub print_help ();
sub print_usage ();

$ENV{'PATH'}='/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin';
$ENV{'BASH_ENV'}='';
$ENV{'ENV'}='';

Getopt::Long::Configure('bundling');
GetOptions
        ("V"   => \$opt_V,   "version"    => \$opt_V,
         "h"   => \$opt_h,   "help"       => \$opt_h,
         "v"   => \$verbose, "verbose"    => \$verbose,
         "F=s" => \$opt_F,   "filename=s" => \$opt_F,
         "t=i" => \$opt_t, "timeout=i"  => \$opt_t);

if ($opt_V) {
        print_revision($PROGNAME,'2.2.1');
        exit $ERRORS{'OK'};
}

unless (defined $opt_t) {
        $opt_t = $utils::TIMEOUT ;      # default timeout
}


if ($opt_h) {print_help(); exit $ERRORS{'OK'};}

unless (defined $opt_F) {
        $opt_F = $ENV{'LM_LICENSE_FILE'};
        unless (defined $opt_F) {
                print "Missing license.dat file\n";
                print_usage();
                exit $ERRORS{'UNKNOWN'};
        }
}
# Just in case of problems, let's not hang Nagios
$SIG{'ALRM'} = sub {
        print "Timeout: No Answer from Client\n";
        exit $ERRORS{'UNKNOWN'};
};
alarm($opt_t);

my $lmstat = $utils::PATH_TO_LMSTAT ;
unless (-x $lmstat ) {
        print "Cannot find \"lmstat\"\n";
        exit $ERRORS{'UNKNOWN'};
}

Answer 1

永远不要假设您知道某物是什么。尝试打印路径以验证它是否如您所想:

unless (-x $utils::PATH_TO_LMSTAT ) {
    print qq/Cannot find "lmstat" at <$utils::PATH_TO_LMSTAT>\n/;
    exit $ERRORS{'UNKNOWN'};
}

如果 $utils::PATH_TO_LMSTAT 是相对路径(例如 lmstat 本身)，则 -x 会在当前目录中查找.如果是完整路径，则可能是您输入的字符串有误。

请注意，您的选项处理可能不那么笨拙，因为您可以在同一键中为选项指定多个名称:

GetOptions(
        "V|version"    => \$opt_V,
        "h|help"       => \$opt_h,
        "v|verbose"    => \$verbose,
        "F|filename=s" => \$opt_F,
        "t|timeout=i"  => \$opt_t,
        );

Mastering Perl 的“安全编程技术”一章讨论了调用外部程序的程序的许多令人头疼的问题。