Today I realized I was missing the showrev command on a Solaris 10 machine I installed.
I found it in the SUNWadmc package but recieved the following error:
ld.so.1: showrev: fatal: libadmapm.so.2: open failed: No such file or directory
Then I found the following page:
showrev(1M) missing on Solaris 8
Adding the SUNWadmfw package as mentioned still left me with the following error:
ld.so.1: showrev: fatal: libadmutil.so.2: open failed: No such file or directory
It turns out I was missing the SUNWadmlib-sysid package.
SUMMARY
If you are missing showrev check if you have the following packages:
SUNWadmlib-sysid SUNWadmc SUNWadmfw
Good luck!