Date: Wed, 4 Jun 1997 19:03:52 +0100 (MET DST) From: Matthias Buelow <token@wicx50.informatik.uni-wuerzburg.de> To: borjam@we.lc.ehu.es (Borja Marcos) Cc: freebsd-hackers@freebsd.org Subject: Re: Linux clone() system call Message-ID: <9706041703.AA09686@wicx01.informatik.uni-wuerzburg.de> In-Reply-To: <9706041530.AA02422@sirius.we.lc.ehu.es> from "Borja Marcos" at Jun 4, 97 05:30:55 pm
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> Anyone knows what is the clone() system call in Lunux?
> It seems not to be supported by the Linux emulator. I tried running
> the Linux version of Inferno and it died with something like
> "clone(): unimplemented system call".
>
> I did a "man clone" in a Linux box and it gave me
> the "undocumented calls" man page.
CLONE(2) Linux Programmer's Manual CLONE(2)
NAME
clone - create a child process
SYNOPSIS
#include <linux/sched.h>
#include <linux/unistd.h>
pid_t clone(void *sp, unsigned long flags)
DESCRIPTION
clone is an alternate interface to fork, with more
options. fork is equivalent to clone(0, SIGCLD|COPYVM).
[...]
clone(2) is a Linux-unique system call (they formed it after a Plan9
syscall afaik) and not portable.
It looks more or less like a kludgy hack interface to fork/vfork
especially when you consider the following :-) :
ERRORS
ENOSYS clone will always return this error, unless your
kernel was compiled with CLONE_ACTUALLY_WORKS_OK
defined.
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