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Postings from February 2016
Eric Brine wrote: >Can anyone explain why a colon on the first line is ignored? That'll be due to the old convention, predating shebang, for distinguishing script interpreters. The arrangement is that a script starting with a line containing only colon is taken to be a sh script, and a script starting with a hash is taken to be a csh script. In sh, colon is a no-op command; it predates the availability of hash-introduced comments in Bourne shells. On a system using this convention, you can make a Perl script work by starting it with a colon line followed by one of the well-known duoglot formulations to make sh feed the script to Perl. For this to work requires that Perl skip the initial colon line. -zeframThread Previous | Thread Next