freebsd-skq/usr.bin/procstat/procstat_vm.c
Joe Marcus Clarke 08afefa814 Do not segfault when procstat -f or procstat -v is called on a process not
owned by the current user.  If kinfo_getfile() or kinfo_getvmmap() return
NULL, simply exit, and do not try and derefernce the memory.

Reviewed by:	peter
Approved by:	peter
2008-12-19 06:50:15 +00:00

106 lines
3.1 KiB
C

/*-
* Copyright (c) 2007 Robert N. M. Watson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <libutil.h>
#include "procstat.h"
void
procstat_vm(pid_t pid, struct kinfo_proc *kipp __unused)
{
struct kinfo_vmentry *freep, *kve;
int ptrwidth;
int i, cnt;
const char *str;
ptrwidth = 2*sizeof(void *) + 2;
if (!hflag)
printf("%5s %*s %*s %3s %4s %4s %3s %3s %2s %-2s %-s\n",
"PID", ptrwidth, "START", ptrwidth, "END", "PRT", "RES",
"PRES", "REF", "SHD", "FL", "TP", "PATH");
freep = kinfo_getvmmap(pid, &cnt);
if (freep == NULL)
return;
for (i = 0; i < cnt; i++) {
kve = &freep[i];
printf("%5d ", pid);
printf("%#*jx ", ptrwidth, (uintmax_t)kve->kve_start);
printf("%#*jx ", ptrwidth, (uintmax_t)kve->kve_end);
printf("%s", kve->kve_protection & KVME_PROT_READ ? "r" : "-");
printf("%s", kve->kve_protection & KVME_PROT_WRITE ? "w" : "-");
printf("%s ", kve->kve_protection & KVME_PROT_EXEC ? "x" : "-");
printf("%4d ", kve->kve_resident);
printf("%4d ", kve->kve_private_resident);
printf("%3d ", kve->kve_ref_count);
printf("%3d ", kve->kve_shadow_count);
printf("%-1s", kve->kve_flags & KVME_FLAG_COW ? "C" : "-");
printf("%-1s ", kve->kve_flags & KVME_FLAG_NEEDS_COPY ? "N" :
"-");
switch (kve->kve_type) {
case KVME_TYPE_NONE:
str = "--";
break;
case KVME_TYPE_DEFAULT:
str = "df";
break;
case KVME_TYPE_VNODE:
str = "vn";
break;
case KVME_TYPE_SWAP:
str = "sw";
break;
case KVME_TYPE_DEVICE:
str = "dv";
break;
case KVME_TYPE_PHYS:
str = "ph";
break;
case KVME_TYPE_DEAD:
str = "dd";
break;
case KVME_TYPE_UNKNOWN:
default:
str = "??";
break;
}
printf("%-2s ", str);
printf("%-s\n", kve->kve_path);
}
free(freep);
}