Article View: comp.sys.amiga.tech
Article #10595Re: Lattice C
From: Michael
Date: Tue, 13 Dec 1988 23:30
Date: Tue, 13 Dec 1988 23:30
37 lines
1562 bytes
1562 bytes
In article <4197@hcr.UUCP> morgan@hcr.UUCP (Morgan Jones) writes:
>In article <6013@killer.DALLAS.TX.US> jdp@killer.UUCP writes:
>>Also, does the Unix (tm) function system() return to the caller when the
>>external program is completed?
>
>int
>system(cmd)
> char *cmd;
>{
> if (cmd == "" || cmd == NULL)
> Execute("",Input(),0L);
> else
> Execute("",0L,0L);
> return(0);
>}
no no no.
First, system takes a cmd arg. I know the above is wrong because it isn't
even using cmd.
In answer to the question about unix, it does return when the called
program returns. So, a better approach would be
Execute (cmd, Input(), Output());
is closer. Problems: If cmd == NULL, Execute will start a shell,
system() does nothing. If you are from Workbench, I don't think
Input() and Output() are defined (might be NULL, which is OK; might be
garbage, which is not).
I thought I remembered another difference between system and Execute,
but I can't think of it offhand.
Michael
: ---
: Michael Gersten uunet.uu.net!stb!michael
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: Coff Coff <=== Stop smoking.
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!lll-lcc!ames!pacbell!ditka!stb!michael From: michael@stb.UUCP (Michael) Newsgroups: comp.sys.amiga.tech Subject: Re: Lattice C Keywords: Amiga Lattice C functions Unix Message-ID: <10635@stb.UUCP> Date: 13 Dec 88 23:30:26 GMT References: <6013@killer.DALLAS.TX.US> <4197@hcr.UUCP> Reply-To: michael@stb.UUCP (Michael) Organization: STB BBS, La, Ca, Usa, +1 213 459 7231 Lines: 36