Date: Wed, 14 Jul 1999 11:51:58 +0100 From: Ben Smithurst <ben@scientia.demon.co.uk> To: Mikhail Teterin <mi@kot.ne.mediaone.net> Cc: questions@freebsd.org Subject: Re: result of pclose Message-ID: <19990714115158.A75763@rainbow5.scientia.demon.co.uk> In-Reply-To: <199907140430.AAA30964@kot.ne.mediaone.net> References: <199907140430.AAA30964@kot.ne.mediaone.net>
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Mikhail Teterin wrote:
> Produces:
> /usr/bin/false's result was 256
> /usr/bin/true's result was 0
>=20
> I checked and rechecked -- false(1) returns 1
Yes, see wait(2). The value returned is (exit_code << 8) with the low 7
bits specifying the signal number the process died from and the other bit
specifying if the process dumped core or not. Just use (code >> 8) to get
the exit status, or see the W* macros documented in wait(2).
--=20
Ben Smithurst | PGP: 0x99392F7D
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