karls-mac-mini:Desktop karl$ perlcritic -1 ipc.pl 
Code is not tidy at line 1, column 1.  See page 33 of PBP.  (Severity: 1)
No package-scoped "$VERSION" variable found at line 1, column 1.  See page 404 of PBP.  (Severity: 2)
Magic punctuation variable $0 used at line 9, column 21.  See page 79 of PBP.  (Severity: 2)
Useless interpolation of literal string at line 11, column 13.  See page 51 of PBP.  (Severity: 1)
Quotes used with a noisy string at line 17, column 24.  See page 53 of PBP.  (Severity: 2)
Return value of flagged function ignored - print at line 26, column 5.  See pages 208,278 of PBP.  (Severity: 1)
Useless interpolation of literal string at line 31, column 21.  See page 51 of PBP.  (Severity: 1)
Builtin function called with parentheses at line 33, column 1.  See page 13 of PBP.  (Severity: 1)
Useless interpolation of literal string at line 33, column 22.  See page 51 of PBP.  (Severity: 1)
Builtin function called with parentheses at line 35, column 1.  See page 13 of PBP.  (Severity: 1)
Useless interpolation of literal string at line 35, column 22.  See page 51 of PBP.  (Severity: 1)