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be more descriptive about what failed by printing the errno and the 

variable we were trying to fetch.
This commit is contained in:
christos 2003-12-07 07:27:09 +00:00
parent 609617af90
commit 676abde787
3 changed files with 10 additions and 9 deletions
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4
usr.bin/systat/extern.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: extern.h,v 1.32 2003/09/12 17:32:31 mycroft Exp $ */
/* $NetBSD: extern.h,v 1.33 2003/12/07 07:27:09 christos Exp $ */
/*-
* Copyright (c) 1991, 1993
@ -129,7 +129,7 @@ void ip_run(char *);
void ip_time(char *);
void ip_zero(char *);
int keyboard(void) __attribute__((__noreturn__));
ssize_t kvm_ckread(const void *, void *, size_t);
ssize_t kvm_ckread(const void *, void *, size_t, const char *);
void labelbufcache(void);
void labelicmp(void);
void labeliostat(void);

11
usr.bin/systat/fetch.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: fetch.c,v 1.11 2003/08/07 11:15:58 agc Exp $ */
/* $NetBSD: fetch.c,v 1.12 2003/12/07 07:27:09 christos Exp $ */
/*-
* Copyright (c) 1980, 1992, 1993
@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)fetch.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: fetch.c,v 1.11 2003/08/07 11:15:58 agc Exp $");
__RCSID("$NetBSD: fetch.c,v 1.12 2003/12/07 07:27:09 christos Exp $");
#endif /* not lint */
#include <sys/param.h>
@ -42,17 +42,18 @@ __RCSID("$NetBSD: fetch.c,v 1.11 2003/08/07 11:15:58 agc Exp $");
#include <sys/sysctl.h>
#include <string.h>
#include <errno.h>
#include "systat.h"
#include "extern.h"
ssize_t
kvm_ckread(const void *a, void *b, size_t l)
kvm_ckread(const void *a, void *b, size_t l, const char *name)
{
if (kvm_read(kd, (u_long)a, b, l) != l) {
if (verbose)
error("error reading kmem at %lx\n",
(u_long) a);
error("error reading kmem for %s at %p (%s)\n", name,
a, strerror(errno));
return (0);
} else
return (1);

4
usr.bin/systat/systat.h
View File

@ -57,8 +57,8 @@ struct command {
#define TCP 0x1
#define UDP 0x2
#define KREAD(addr, buf, len) kvm_ckread((addr), (buf), (len))
#define KREAD(addr, buf, len) kvm_ckread((addr), (buf), (len), # addr)
#define NVAL(indx) namelist[(indx)].n_value
#define NPTR(indx) (void *)NVAL((indx))
#define NREAD(indx, buf, len) kvm_ckread(NPTR((indx)), (buf), (len))
#define NREAD(indx, buf, len) kvm_ckread(NPTR((indx)), (buf), (len), # indx)
#define LONG (sizeof (long))