File: [local] / src / usr.bin / top / machine.c (download)
Revision 1.35, Wed Jun 18 08:36:31 2003 UTC (20 years, 11 months ago) by deraadt
Branch: MAIN
Changes since 1.34: +6 -9 lines
remove unused variables
|
/* $OpenBSD: machine.c,v 1.35 2003/06/18 08:36:31 deraadt Exp $ */
/*-
* Copyright (c) 1994 Thorsten Lockert <tholo@sigmasoft.com>
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 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.
*
* AUTHOR: Thorsten Lockert <tholo@sigmasoft.com>
* Adapted from BSD4.4 by Christos Zoulas <christos@ee.cornell.edu>
* Patch for process wait display by Jarl F. Greipsland <jarle@idt.unit.no>
* Patch for -DORDER by Kenneth Stailey <kstailey@disclosure.com>
* Patch for new swapctl(2) by Tobias Weingartner <weingart@openbsd.org>
*/
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <err.h>
#include <math.h>
#include <unistd.h>
#include <sys/errno.h>
#include <sys/sysctl.h>
#include <sys/dir.h>
#include <sys/dkstat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/swap.h>
#include <err.h>
#include "top.h"
#include "display.h"
#include "machine.h"
#include "utils.h"
#include "loadavg.h"
static int swapmode(int *, int *);
/* get_process_info passes back a handle. This is what it looks like: */
struct handle {
struct kinfo_proc **next_proc; /* points to next valid proc pointer */
int remaining; /* number of pointers remaining */
};
#define PP(pp, field) ((pp)->kp_proc . field)
#define EP(pp, field) ((pp)->kp_eproc . field)
#define VP(pp, field) ((pp)->kp_eproc.e_vm . field)
/* what we consider to be process size: */
#define PROCSIZE(pp) (VP((pp), vm_tsize) + VP((pp), vm_dsize) + VP((pp), vm_ssize))
/*
* These definitions control the format of the per-process area
*/
static char header[] =
" PID X PRI NICE SIZE RES STATE WAIT TIME CPU COMMAND";
/* 0123456 -- field to fill in starts at header+6 */
#define UNAME_START 6
#define Proc_format \
"%5d %-8.8s %3d %4d %5s %5s %-5s %-6.6s %6s %5.2f%% %.14s"
/* process state names for the "STATE" column of the display */
/*
* the extra nulls in the string "run" are for adding a slash and the
* processor number when needed
*/
char *state_abbrev[] = {
"", "start", "run\0\0\0", "sleep", "stop", "zomb",
};
static int stathz;
/* these are for calculating cpu state percentages */
static long cp_time[CPUSTATES];
static long cp_old[CPUSTATES];
static long cp_diff[CPUSTATES];
/* these are for detailing the process states */
int process_states[7];
char *procstatenames[] = {
"", " starting, ", " running, ", " idle, ",
" stopped, ", " zombie, ",
NULL
};
/* these are for detailing the cpu states */
int cpu_states[CPUSTATES];
char *cpustatenames[] = {
"user", "nice", "system", "interrupt", "idle", NULL
};
/* these are for detailing the memory statistics */
int memory_stats[8];
char *memorynames[] = {
"Real: ", "K/", "K act/tot ", "Free: ", "K ",
"Swap: ", "K/", "K used/tot",
NULL
};
/* these are names given to allowed sorting orders -- first is default */
char *ordernames[] = {
"cpu", "size", "res", "time", "pri", NULL
};
/* these are for keeping track of the proc array */
static int nproc;
static int onproc = -1;
static int pref_len;
static struct kinfo_proc *pbase;
static struct kinfo_proc **pref;
/* these are for getting the memory statistics */
static int pageshift; /* log base 2 of the pagesize */
/* define pagetok in terms of pageshift */
#define pagetok(size) ((size) << pageshift)
unsigned int maxslp;
int
getstathz(void)
{
struct clockinfo cinf;
size_t size = sizeof(cinf);
int mib[2];
mib[0] = CTL_KERN;
mib[1] = KERN_CLOCKRATE;
if (sysctl(mib, 2, &cinf, &size, NULL, 0) == -1)
return (-1);
return (cinf.stathz);
}
int
machine_init(struct statics *statics)
{
int pagesize;
stathz = getstathz();
if (stathz == -1)
return (-1);
pbase = NULL;
pref = NULL;
onproc = -1;
nproc = 0;
/*
* get the page size with "getpagesize" and calculate pageshift from
* it
*/
pagesize = getpagesize();
pageshift = 0;
while (pagesize > 1) {
pageshift++;
pagesize >>= 1;
}
/* we only need the amount of log(2)1024 for our conversion */
pageshift -= LOG1024;
/* fill in the statics information */
statics->procstate_names = procstatenames;
statics->cpustate_names = cpustatenames;
statics->memory_names = memorynames;
statics->order_names = ordernames;
return (0);
}
char *
format_header(char *uname_field)
{
char *ptr;
ptr = header + UNAME_START;
while (*uname_field != '\0')
*ptr++ = *uname_field++;
return (header);
}
void
get_system_info(struct system_info *si)
{
static int sysload_mib[] = {CTL_VM, VM_LOADAVG};
static int vmtotal_mib[] = {CTL_VM, VM_METER};
static int cp_time_mib[] = {CTL_KERN, KERN_CPTIME};
struct loadavg sysload;
struct vmtotal vmtotal;
double *infoloadp;
size_t size;
int i;
size = sizeof(cp_time);
if (sysctl(cp_time_mib, 2, &cp_time, &size, NULL, 0) < 0)
warn("sysctl kern.cp_time failed");
size = sizeof(sysload);
if (sysctl(sysload_mib, 2, &sysload, &size, NULL, 0) < 0)
warn("sysctl failed");
infoloadp = si->load_avg;
for (i = 0; i < 3; i++)
*infoloadp++ = ((double) sysload.ldavg[i]) / sysload.fscale;
/* convert cp_time counts to percentages */
(void) percentages(CPUSTATES, cpu_states, cp_time, cp_old, cp_diff);
/* get total -- systemwide main memory usage structure */
size = sizeof(vmtotal);
if (sysctl(vmtotal_mib, 2, &vmtotal, &size, NULL, 0) < 0) {
warn("sysctl failed");
bzero(&vmtotal, sizeof(vmtotal));
}
/* convert memory stats to Kbytes */
memory_stats[0] = -1;
memory_stats[1] = pagetok(vmtotal.t_arm);
memory_stats[2] = pagetok(vmtotal.t_rm);
memory_stats[3] = -1;
memory_stats[4] = pagetok(vmtotal.t_free);
memory_stats[5] = -1;
if (!swapmode(&memory_stats[6], &memory_stats[7])) {
memory_stats[6] = 0;
memory_stats[7] = 0;
}
/* set arrays and strings */
si->cpustates = cpu_states;
si->memory = memory_stats;
si->last_pid = -1;
}
static struct handle handle;
struct kinfo_proc *
getprocs(int op, int arg, int *cnt)
{
size_t size = sizeof(int);
int mib[4] = {CTL_KERN, KERN_PROC, 0, 0};
int smib[2] = {CTL_KERN, KERN_NPROCS};
static int maxslp_mib[] = {CTL_VM, VM_MAXSLP};
static struct kinfo_proc *procbase;
int st;
mib[2] = op;
mib[3] = arg;
size = sizeof(maxslp);
if (sysctl(maxslp_mib, 2, &maxslp, &size, NULL, 0) < 0) {
warn("sysctl vm.maxslp failed");
return (0);
}
st = sysctl(smib, 2, cnt, &size, NULL, 0);
if (st == -1) {
/* _kvm_syserr(kd, kd->program, "kvm_getprocs"); */
return (0);
}
if (procbase)
free(procbase);
size = (6 * (*cnt) * sizeof(struct kinfo_proc)) / 5;
procbase = (struct kinfo_proc *) malloc(size);
if (procbase == NULL)
return (0);
st = sysctl(mib, 4, procbase, &size, NULL, 0);
if (st == -1) {
/* _kvm_syserr(kd, kd->program, "kvm_getprocs"); */
return (0);
}
if (size % sizeof(struct kinfo_proc) != 0) {
/*
* _kvm_err(kd, kd->program, "proc size mismatch (%d total,
* %d chunks)", size, sizeof(struct kinfo_proc));
*/
return (0);
}
return (procbase);
}
caddr_t
get_process_info(struct system_info *si, struct process_select *sel,
int (*compare) (const void *, const void *))
{
int show_idle, show_system, show_uid;
int total_procs, active_procs, i;
struct kinfo_proc **prefp, *pp;
if ((pbase = getprocs(KERN_PROC_KTHREAD, 0, &nproc)) == NULL) {
/* warnx("%s", kvm_geterr(kd)); */
quit(23);
}
if (nproc > onproc)
pref = (struct kinfo_proc **)realloc(pref,
sizeof(struct kinfo_proc *) * (onproc = nproc));
if (pref == NULL) {
warnx("Out of memory.");
quit(23);
}
/* get a pointer to the states summary array */
si->procstates = process_states;
/* set up flags which define what we are going to select */
show_idle = sel->idle;
show_system = sel->system;
show_uid = sel->uid != (uid_t)-1;
/* count up process states and get pointers to interesting procs */
total_procs = 0;
active_procs = 0;
memset((char *) process_states, 0, sizeof(process_states));
prefp = pref;
for (pp = pbase, i = 0; i < nproc; pp++, i++) {
/*
* Place pointers to each valid proc structure in pref[].
* Process slots that are actually in use have a non-zero
* status field. Processes with SSYS set are system
* processes---these get ignored unless show_sysprocs is set.
*/
if (PP(pp, p_stat) != 0 &&
(show_system || ((PP(pp, p_flag) & P_SYSTEM) == 0))) {
total_procs++;
process_states[(unsigned char) PP(pp, p_stat)]++;
if ((PP(pp, p_stat) != SZOMB) &&
(show_idle || (PP(pp, p_pctcpu) != 0) ||
(PP(pp, p_stat) == SRUN)) &&
(!show_uid || EP(pp, e_pcred.p_ruid) == sel->uid)) {
*prefp++ = pp;
active_procs++;
}
}
}
/* if requested, sort the "interesting" processes */
if (compare != NULL)
qsort((char *) pref, active_procs,
sizeof(struct kinfo_proc *), compare);
/* remember active and total counts */
si->p_total = total_procs;
si->p_active = pref_len = active_procs;
/* pass back a handle */
handle.next_proc = pref;
handle.remaining = active_procs;
return ((caddr_t) & handle);
}
char fmt[MAX_COLS]; /* static area where result is built */
char *
format_next_process(caddr_t handle, char *(*get_userid)())
{
char *p_wait, waddr[sizeof(void *) * 2 + 3]; /* Hexify void pointer */
struct kinfo_proc *pp;
struct handle *hp;
int cputime;
double pct;
/* find and remember the next proc structure */
hp = (struct handle *) handle;
pp = *(hp->next_proc++);
hp->remaining--;
/* get the process's user struct and set cputime */
if ((PP(pp, p_flag) & P_INMEM) == 0) {
/*
* Print swapped processes as <pname>
*/
char *comm = PP(pp, p_comm);
char buf[sizeof(PP(pp, p_comm))];
(void) strlcpy(buf, comm, sizeof buf);
comm[0] = '<';
(void) strlcpy(&comm[1], buf, sizeof buf - 1);
(void) strlcat(comm, ">", sizeof buf);
}
cputime = (PP(pp, p_uticks) + PP(pp, p_sticks) + PP(pp, p_iticks)) / stathz;
/* calculate the base for cpu percentages */
pct = pctdouble(PP(pp, p_pctcpu));
if (PP(pp, p_wchan)) {
if (PP(pp, p_wmesg))
p_wait = EP(pp, e_wmesg);
else {
snprintf(waddr, sizeof(waddr), "%lx",
(unsigned long) (PP(pp, p_wchan)) & ~KERNBASE);
p_wait = waddr;
}
} else
p_wait = "-";
/* format this entry */
snprintf(fmt, sizeof fmt, Proc_format,
PP(pp, p_pid), (*get_userid) (EP(pp, e_pcred.p_ruid)),
PP(pp, p_priority) - PZERO, PP(pp, p_nice) - NZERO,
format_k(pagetok(PROCSIZE(pp))),
format_k(pagetok(VP(pp, vm_rssize))),
(PP(pp, p_stat) == SSLEEP && PP(pp, p_slptime) > maxslp) ?
"idle" : state_abbrev[(unsigned char) PP(pp, p_stat)],
p_wait, format_time(cputime), 100.0 * pct,
printable(PP(pp, p_comm)));
/* return the result */
return (fmt);
}
/* comparison routine for qsort */
static unsigned char sorted_state[] =
{
0, /* not used */
4, /* start */
5, /* run */
2, /* sleep */
3, /* stop */
1 /* zombie */
};
/*
* proc_compares - comparison functions for "qsort"
*/
/*
* First, the possible comparison keys. These are defined in such a way
* that they can be merely listed in the source code to define the actual
* desired ordering.
*/
#define ORDERKEY_PCTCPU \
if (lresult = (pctcpu)PP(p2, p_pctcpu) - (pctcpu)PP(p1, p_pctcpu), \
(result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0)
#define ORDERKEY_CPUTIME \
if ((result = PP(p2, p_rtime.tv_sec) - PP(p1, p_rtime.tv_sec)) == 0) \
if ((result = PP(p2, p_rtime.tv_usec) - \
PP(p1, p_rtime.tv_usec)) == 0)
#define ORDERKEY_STATE \
if ((result = sorted_state[(unsigned char) PP(p2, p_stat)] - \
sorted_state[(unsigned char) PP(p1, p_stat)]) == 0)
#define ORDERKEY_PRIO \
if ((result = PP(p2, p_priority) - PP(p1, p_priority)) == 0)
#define ORDERKEY_RSSIZE \
if ((result = VP(p2, vm_rssize) - VP(p1, vm_rssize)) == 0)
#define ORDERKEY_MEM \
if ((result = PROCSIZE(p2) - PROCSIZE(p1)) == 0)
/* compare_cpu - the comparison function for sorting by cpu percentage */
int
compare_cpu(const void *v1, const void *v2)
{
struct proc **pp1 = (struct proc **) v1;
struct proc **pp2 = (struct proc **) v2;
struct kinfo_proc *p1, *p2;
pctcpu lresult;
int result;
/* remove one level of indirection */
p1 = *(struct kinfo_proc **) pp1;
p2 = *(struct kinfo_proc **) pp2;
ORDERKEY_PCTCPU
ORDERKEY_CPUTIME
ORDERKEY_STATE
ORDERKEY_PRIO
ORDERKEY_RSSIZE
ORDERKEY_MEM
;
return (result);
}
/* compare_size - the comparison function for sorting by total memory usage */
int
compare_size(const void *v1, const void *v2)
{
struct proc **pp1 = (struct proc **) v1;
struct proc **pp2 = (struct proc **) v2;
struct kinfo_proc *p1, *p2;
pctcpu lresult;
int result;
/* remove one level of indirection */
p1 = *(struct kinfo_proc **) pp1;
p2 = *(struct kinfo_proc **) pp2;
ORDERKEY_MEM
ORDERKEY_RSSIZE
ORDERKEY_PCTCPU
ORDERKEY_CPUTIME
ORDERKEY_STATE
ORDERKEY_PRIO
;
return (result);
}
/* compare_res - the comparison function for sorting by resident set size */
int
compare_res(const void *v1, const void *v2)
{
struct proc **pp1 = (struct proc **) v1;
struct proc **pp2 = (struct proc **) v2;
struct kinfo_proc *p1, *p2;
pctcpu lresult;
int result;
/* remove one level of indirection */
p1 = *(struct kinfo_proc **) pp1;
p2 = *(struct kinfo_proc **) pp2;
ORDERKEY_RSSIZE
ORDERKEY_MEM
ORDERKEY_PCTCPU
ORDERKEY_CPUTIME
ORDERKEY_STATE
ORDERKEY_PRIO
;
return (result);
}
/* compare_time - the comparison function for sorting by CPU time */
int
compare_time(const void *v1, const void *v2)
{
struct proc **pp1 = (struct proc **) v1;
struct proc **pp2 = (struct proc **) v2;
struct kinfo_proc *p1, *p2;
pctcpu lresult;
int result;
/* remove one level of indirection */
p1 = *(struct kinfo_proc **) pp1;
p2 = *(struct kinfo_proc **) pp2;
ORDERKEY_CPUTIME
ORDERKEY_PCTCPU
ORDERKEY_STATE
ORDERKEY_PRIO
ORDERKEY_MEM
ORDERKEY_RSSIZE
;
return (result);
}
/* compare_prio - the comparison function for sorting by CPU time */
int
compare_prio(const void *v1, const void *v2)
{
struct proc **pp1 = (struct proc **) v1;
struct proc **pp2 = (struct proc **) v2;
struct kinfo_proc *p1, *p2;
pctcpu lresult;
int result;
/* remove one level of indirection */
p1 = *(struct kinfo_proc **) pp1;
p2 = *(struct kinfo_proc **) pp2;
ORDERKEY_PRIO
ORDERKEY_PCTCPU
ORDERKEY_CPUTIME
ORDERKEY_STATE
ORDERKEY_RSSIZE
ORDERKEY_MEM
;
return (result);
}
int (*proc_compares[])(const void *, const void *) = {
compare_cpu,
compare_size,
compare_res,
compare_time,
compare_prio,
NULL
};
/*
* proc_owner(pid) - returns the uid that owns process "pid", or -1 if
* the process does not exist.
* It is EXTREMLY IMPORTANT that this function work correctly.
* If top runs setuid root (as in SVR4), then this function
* is the only thing that stands in the way of a serious
* security problem. It validates requests for the "kill"
* and "renice" commands.
*/
uid_t
proc_owner(pid_t pid)
{
struct kinfo_proc **prefp, *pp;
int cnt;
prefp = pref;
cnt = pref_len;
while (--cnt >= 0) {
pp = *prefp++;
if (PP(pp, p_pid) == pid)
return ((uid_t) EP(pp, e_pcred.p_ruid));
}
return (uid_t)(-1);
}
/*
* swapmode is rewritten by Tobias Weingartner <weingart@openbsd.org>
* to be based on the new swapctl(2) system call.
*/
static int
swapmode(int *used, int *total)
{
struct swapent *swdev;
int nswap, rnswap, i;
nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap == 0)
return 0;
swdev = malloc(nswap * sizeof(*swdev));
if (swdev == NULL)
return 0;
rnswap = swapctl(SWAP_STATS, swdev, nswap);
if (rnswap == -1)
return 0;
/* if rnswap != nswap, then what? */
/* Total things up */
*total = *used = 0;
for (i = 0; i < nswap; i++) {
if (swdev[i].se_flags & SWF_ENABLE) {
*used += (swdev[i].se_inuse / (1024 / DEV_BSIZE));
*total += (swdev[i].se_nblks / (1024 / DEV_BSIZE));
}
}
free(swdev);
return 1;
}