Date: Sun, 03 Mar 2002 09:19:38 -0600 (CST) From: Conrad Sabatier <conrads@cox.net> To: freebsd-hackers@freebsd.org Subject: A few questions about a few includes Message-ID: <XFMail.20020303091938.conrads@cox.net>
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Am I just completely stupid, or do we have a few things that could use a
little cleaning up in /usr/include as well as in the man page for kvm_*?
System: FreeBSD 4.5-STABLE
1) The man page for the kvm_* functions lists the following #include
dependencies:
#include <kvm.h>
#include <sys/param.h>
#include <sys/sysctl.h>
However, kvm.h contains some declarations that also require <sys/proc.h> and
<sys/user.h> (namely, struct kinfo_proc and struct proc). Otherwise, one
might encounter warnings/errors re: incomplete types.
2) If compiling with the -pedantic switch, one might see something like
this:
In file included from main.c:151:
/usr/include/sys/proc.h:108: warning: ANSI C forbids zero-size array
`ar_args'
In <sys/proc.h>:
/*
* pargs, used to hold a copy of the command line, if it had a sane
* length
*/
struct pargs {
u_int ar_ref; /* Reference count */
u_int ar_length; /* Length */
u_char ar_args[0]; /* Arguments */
};
This does indeed seem to make little or no sense. Could someone explain
this? Is ar_args supposed to be a pointer or what?
3) Furthermore, on including <sys/user.h>, one then sees this:
In file included from /usr/include/sys/user.h:40,
from main.c:153:
/usr/include/machine/pcb.h:90: warning: struct has no members
In <machine/pcb.h>:
/*
* The pcb is augmented with machine-dependent additional data for
* core dumps. For the i386: ???
*/
struct md_coredump {
};
Nowhere under /usr/include is a more complete definition of md_coredump to
be found. This looks awfully "kludgy" to me.
I do hope someone can shed some light here. Thanks.
--
Conrad Sabatier <conrads@cox.net>
First Rule of History:
History doesn't repeat itself -- historians merely repeat each
other.
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