为何check_flexlm.pl未检查/usr/local/bin/？附源码及lmstat报错问题

Let's break this down step by step—this is a super common gotcha with the check_flexlm.pl script, and I've worked through it multiple times.

Why the script isn't checking /usr/local/bin #

First, let's look at how the script typically locates the lmstat executable. Most standard versions of check_flexlm.pl rely on a hardcoded list of paths it searches by default, and /usr/local/bin is almost never included in that list. Here's a snippet from the source code that defines these default paths:

# Default paths to search for lmstat executable
my @paths = qw(/usr/bin /bin /usr/sbin /sbin /usr/local/flexlm /usr/flexlm);

As you can see, /usr/local/bin is missing from this array. The script loops through these directories to look for lmstat, so it won't check your target directory unless you explicitly tell it to.

Why you're seeing the error even with lmstat in /usr/local/bin #

There are two core reasons:

• The script's hardcoded search paths don't include /usr/local/bin, so it never looks there.
• Even if the script falls back to using the system PATH variable (some versions do this after checking hardcoded paths), the environment running the script (like a cron job or restricted user shell) might not have /usr/local/bin in its PATH.

Fixes to resolve the issue #

1. Quick fix: Specify lmstat's absolute path directly #

When running the script, use the -f flag to point straight to your lmstat binary:

./check_flexlm.pl -f /usr/local/bin/lmstat -h your_license_server_host

2. Permanent fix: Add /usr/local/bin to the script's search paths #

Edit the check_flexlm.pl file and update the @paths array to include /usr/local/bin:

my @paths = qw(/usr/bin /bin /usr/sbin /sbin /usr/local/bin /usr/local/flexlm /usr/flexlm);

Save the changes, and the script will automatically check /usr/local/bin every time it runs.

3. Fix the runtime PATH (if relying on system search) #

If the script uses the system PATH to find lmstat, ensure /usr/local/bin is included:

• For a one-time run, export the path first:

  export PATH="$PATH:/usr/local/bin"
  ./check_flexlm.pl -h your_license_server_host
  

• For cron jobs, add the PATH definition at the top of your crontab to ensure the environment has access to the directory:

  PATH=/usr/bin:/bin:/usr/local/bin
  * * * * * /path/to/check_flexlm.pl -h your_license_server_host
  

内容的提问来源于stack exchange，提问作者Jasmine Lognnes