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PostgreSQL on cygwin: "Bad system call"

I was getting this "Bad system call" message from PostgreSQL 7.4.x on cygwin. It was working earlier, and I thought I had done everything right--cygserver was up and running, so I didn't know what was up. ipcs gave the same error.

Turns out I had forgot the magic word: "CYGWIN=server". The first time I installed PostgreSQL (and read the docs), I had just set the var on the command line (CYGWIN=server pg_ctl start ...) and never put it in my profile. Easy enough to fix.
Written on December 23, 2004