Re: The Peter Principle

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From: Joe Pfeiffer
Date: Sat, 07 Jul 2018 23:16

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Charles Richmond <nume...@aquaporin4.com> writes:

> On 7/6/2018 8:00 PM, Dan Espen wrote:
>> Charles Richmond <nume...@aquaporin4.com> writes:
>>>>
>>> Can an unsuccessful exec() call return???  And where would it return to???
>>
>> The answer is in the man page:
>>
>> RETURN VALUES
>>    If a function in the exec family returns to the calling process image,
>>    an error has occurred; the return value is -1 and errno is set to
>>    indicate the error.
>>    
>
> The calling process for exec() must be the child process.  ISTM the
> child process must signal the parent process and abort... if exec()
> fails.

There is no requirement that there even be a child process.  There is no
reason a process can't replace its own running image using an exec().

If it's a normal fork&exec, the child process can just exit() (presumably
with an error return code) and the parent will find out about it in any
of the ways already available (including, of course, SIGCHLD).

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From: Joe Pfeiffer <pfei...@cs.nmsu.edu>
Newsgroups: alt.folklore.computers
Subject: Re: The Peter Principle
Date: Sat, 07 Jul 2018 17:16:05 -0600
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