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/*
* top - a top users display for Unix
*
* SYNOPSIS: For Intel based System V Release 4
*
* DESCRIPTION:
* System V release 4.0.x for i486
* System V release 4 for Okidata M88100
* and probably other svr4 ports
*
* LIBS: -lelf
*
* AUTHORS: Andrew Herbert <andrew@werple.apana.org.au>
* Robert Boucher <boucher@sofkin.ca>
*/
#include "top.h"
#include "machine.h"
#include "utils.h"
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <dirent.h>
#include <nlist.h>
#include <string.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/procfs.h>
#include <sys/sysinfo.h>
#include <sys/sysmacros.h>
#include <sys/vmmeter.h>
#include <vm/anon.h>
#include <sys/priocntl.h>
#include <sys/rtpriocntl.h>
#include <sys/tspriocntl.h>
#include <sys/procset.h>
#include <sys/var.h>
#define UNIX "/stand/unix"
#define KMEM "/dev/kmem"
#define PROCFS "/proc"
#define CPUSTATES 5
#ifndef PRIO_MAX
#define PRIO_MAX 20
#endif
#ifndef PRIO_MIN
#define PRIO_MIN -20
#endif
#ifndef FSCALE
#define FSHIFT 8 /* bits to right of fixed binary point */
#define FSCALE (1<<FSHIFT)
#endif
#define loaddouble(x) ((double)(x) / FSCALE)
#define percent_cpu(x) ((double)(x)->pr_cpu / FSCALE)
#define weighted_cpu(pct, pp) ( ((pp)->pr_time.tv_sec) == 0 ? 0.0 : \
((pp)->pr_cpu) / ((pp)->pr_time.tv_sec) )
#define pagetok(size) ctob(size) >> LOG1024
/* definitions for the index in the nlist array */
#define X_AVENRUN 0
#define X_MPID 1
#define X_V 2
#define X_NPROC 3
#define X_ANONINFO 4
#define X_TOTAL 5
#define X_SYSINFO 6
static struct nlist nlst[] =
{
{"avenrun"}, /* 0 */
{"mpid"}, /* 1 */
{"v"}, /* 2 */
{"nproc"}, /* 3 */
{"anoninfo"}, /* 4 */
{"total"}, /* 5 */
{"sysinfo"}, /* 6 */
{NULL}
};
static unsigned long avenrun_offset;
static unsigned long mpid_offset;
static unsigned long nproc_offset;
static unsigned long anoninfo_offset;
static unsigned long total_offset;
static unsigned long sysinfo_offset;
/* get_process_info passes back a handle. This is what it looks like: */
struct handle
{
struct prpsinfo **next_proc;/* points to next valid proc pointer */
int remaining; /* number of pointers remaining */
};
/*
* These definitions control the format of the per-process area
*/
static char header[] =
" PID X PRI NICE SIZE RES STATE TIME WCPU 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 %6s %3d.0%% %5.2f%% %.16s"
char *state_abbrev[] =
{"", "sleep", "run", "zombie", "stop", "start", "cpu", "swap"};
int process_states[8];
char *procstatenames[] =
{
"", " sleeping, ", " running, ", " zombie, ", " stopped, ",
" starting, ", " on cpu, ", " swapped, ",
NULL
};
int cpu_states[CPUSTATES];
char *cpustatenames[] =
{"idle", "user", "kernel", "wait", "swap", NULL};
/* these are for detailing the memory statistics */
int memory_stats[5];
char *memorynames[] =
{"K real, ", "K active, ", "K free, ", "K swap, ", "K free swap", NULL};
static int kmem = -1;
static int nproc;
static int bytes;
static struct prpsinfo *pbase;
static struct prpsinfo **pref;
static DIR *procdir;
/* useful externals */
extern int errno;
extern char *sys_errlist[];
extern char *myname;
extern int check_nlist ();
extern int getkval ();
extern void perror ();
extern void getptable ();
extern void quit ();
extern int nlist ();
int
machine_init (struct statics *statics)
{
static struct var v;
/* fill in the statics information */
statics->procstate_names = procstatenames;
statics->cpustate_names = cpustatenames;
statics->memory_names = memorynames;
/* get the list of symbols we want to access in the kernel */
if (nlist (UNIX, nlst))
{
(void) fprintf (stderr, "Unable to nlist %s\n", UNIX);
return (-1);
}
/* make sure they were all found */
if (check_nlist (nlst) > 0)
return (-1);
/* open kernel memory */
if ((kmem = open (KMEM, O_RDONLY)) == -1)
{
perror (KMEM);
return (-1);
}
/* get the symbol values out of kmem */
/* NPROC Tuning parameter for max number of processes */
(void) getkval (nlst[X_V].n_value, &v, sizeof (struct var), nlst[X_V].n_name);
nproc = v.v_proc;
/* stash away certain offsets for later use */
mpid_offset = nlst[X_MPID].n_value;
nproc_offset = nlst[X_NPROC].n_value;
avenrun_offset = nlst[X_AVENRUN].n_value;
anoninfo_offset = nlst[X_ANONINFO].n_value;
total_offset = nlst[X_TOTAL].n_value;
sysinfo_offset = nlst[X_SYSINFO].n_value;
/* allocate space for proc structure array and array of pointers */
bytes = nproc * sizeof (struct prpsinfo);
pbase = (struct prpsinfo *) malloc (bytes);
pref = (struct prpsinfo **) malloc (nproc * sizeof (struct prpsinfo *));
/* Just in case ... */
if (pbase == (struct prpsinfo *) NULL || pref == (struct prpsinfo **) NULL)
{
(void) fprintf (stderr, "%s: can't allocate sufficient memory\n", myname);
return (-1);
}
if (!(procdir = opendir (PROCFS)))
{
(void) fprintf (stderr, "Unable to open %s\n", PROCFS);
return (-1);
}
if (chdir (PROCFS))
{ /* handy for later on when we're reading it */
(void) fprintf (stderr, "Unable to chdir to %s\n", PROCFS);
return (-1);
}
/* all done! */
return (0);
}
char *
format_header (char *uname_field)
{
register char *ptr;
ptr = header + UNAME_START;
while (*uname_field != '\0')
*ptr++ = *uname_field++;
return (header);
}
void
get_system_info (struct system_info *si)
{
long avenrun[3];
struct sysinfo sysinfo;
struct vmtotal total;
struct anoninfo anoninfo;
static time_t cp_old[CPUSTATES];
static time_t cp_diff[CPUSTATES]; /* for cpu state percentages */
register int i;
(void) getkval (sysinfo_offset, &sysinfo, sizeof (struct sysinfo), "sysinfo");
/* convert cp_time counts to percentages */
(void) percentages (CPUSTATES, cpu_states, sysinfo.cpu, cp_old, cp_diff);
/* get mpid -- process id of last process */
(void) getkval (mpid_offset, &(si->last_pid), sizeof (si->last_pid),
"mpid");
/* get load average array */
(void) getkval (avenrun_offset, (int *) avenrun, sizeof (avenrun), "avenrun");
/* convert load averages to doubles */
for (i = 0; i < 3; i++)
si->load_avg[i] = loaddouble (avenrun[i]);
/* get total -- systemwide main memory usage structure */
(void) getkval (total_offset, (int *) (&total), sizeof (total), "total");
/* convert memory stats to Kbytes */
memory_stats[0] = pagetok (total.t_rm);
memory_stats[1] = pagetok (total.t_arm);
memory_stats[2] = pagetok (total.t_free);
(void) getkval (anoninfo_offset, (int *) (&anoninfo), sizeof (anoninfo),
"anoninfo");
memory_stats[3] = pagetok (anoninfo.ani_max - anoninfo.ani_free);
memory_stats[4] = pagetok (anoninfo.ani_max - anoninfo.ani_resv);
/* set arrays and strings */
si->cpustates = cpu_states;
si->memory = memory_stats;
}
static struct handle handle;
caddr_t
get_process_info (
struct system_info *si,
struct process_select *sel,
int (*compare) ())
{
register int i;
register int total_procs;
register int active_procs;
register struct prpsinfo **prefp;
register struct prpsinfo *pp;
/* these are copied out of sel for speed */
int show_idle;
int show_system;
int show_uid;
/* Get current number of processes */
(void) getkval (nproc_offset, (int *) (&nproc), sizeof (nproc), "nproc");
/* read all the proc structures */
getptable (pbase);
/* 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 != -1;
/* count up process states and get pointers to interesting procs */
total_procs = 0;
active_procs = 0;
(void) memset (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->pr_state != 0 &&
(show_system || ((pp->pr_flag & SSYS) == 0)))
{
total_procs++;
process_states[pp->pr_state]++;
if ((!pp->pr_zomb) &&
(show_idle || (pp->pr_state == SRUN) || (pp->pr_state == SONPROC)) &&
(!show_uid || pp->pr_uid == (uid_t) sel->uid))
{
*prefp++ = pp;
active_procs++;
}
}
}
/* if requested, sort the "interesting" processes */
if (compare != NULL)
qsort ((char *) pref, active_procs, sizeof (struct prpsinfo *), compare);
/* remember active and total counts */
si->p_total = total_procs;
si->p_active = 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) ())
{
register struct prpsinfo *pp;
struct handle *hp;
register long cputime;
register double pctcpu;
/* find and remember the next proc structure */
hp = (struct handle *) handle;
pp = *(hp->next_proc++);
hp->remaining--;
/* get the cpu usage and calculate the cpu percentages */
cputime = pp->pr_time.tv_sec;
pctcpu = percent_cpu (pp);
/* format this entry */
(void) sprintf (fmt,
Proc_format,
pp->pr_pid,
(*get_userid) (pp->pr_uid),
pp->pr_pri - PZERO,
pp->pr_nice - NZERO,
format_k(pagetok (pp->pr_size)),
format_k(pagetok (pp->pr_rssize)),
state_abbrev[pp->pr_state],
format_time(cputime),
(pp->pr_cpu & 0377),
100.0 * pctcpu,
pp->pr_fname);
/* return the result */
return (fmt);
}
/*
* check_nlist(nlst) - checks the nlist to see if any symbols were not
* found. For every symbol that was not found, a one-line
* message is printed to stderr. The routine returns the
* number of symbols NOT found.
*/
int
check_nlist (register struct nlist *nlst)
{
register int i;
/* check to see if we got ALL the symbols we requested */
/* this will write one line to stderr for every symbol not found */
i = 0;
while (nlst->n_name != NULL)
{
if (nlst->n_type == 0)
{
/* this one wasn't found */
(void) fprintf (stderr, "kernel: no symbol named `%s'\n", nlst->n_name);
i = 1;
}
nlst++;
}
return (i);
}
/*
* getkval(offset, ptr, size, refstr) - get a value out of the kernel.
* "offset" is the byte offset into the kernel for the desired value,
* "ptr" points to a buffer into which the value is retrieved,
* "size" is the size of the buffer (and the object to retrieve),
* "refstr" is a reference string used when printing error meessages,
* if "refstr" starts with a '!', then a failure on read will not
* be fatal (this may seem like a silly way to do things, but I
* really didn't want the overhead of another argument).
*
*/
int
getkval (
unsigned long offset,
int *ptr,
int size,
char *refstr)
{
#ifdef MIPS
if (lseek (kmem, (long) (offset & 0x7fffffff), 0) == -1)
#else
if (lseek (kmem, (long) offset, 0) == -1)
#endif
{
if (*refstr == '!')
refstr++;
(void) fprintf (stderr, "%s: lseek to %s: %s\n",
myname, refstr, sys_errlist[errno]);
quit (22);
}
if (read (kmem, (char *) ptr, size) == -1)
if (*refstr == '!')
/* we lost the race with the kernel, process isn't in memory */
return (0);
else
{
(void) fprintf (stderr, "%s: reading %s: %s\n",
myname, refstr, sys_errlist[errno]);
quit (23);
}
return (1);
}
/* comparison routine for qsort */
/*
* proc_compare - comparison function for "qsort"
* Compares the resource consumption of two processes using five
* distinct keys. The keys (in descending order of importance) are:
* percent cpu, cpu ticks, state, resident set size, total virtual
* memory usage. The process states are ordered as follows (from least
* to most important): WAIT, zombie, sleep, stop, start, run. The
* array declaration below maps a process state index into a number
* that reflects this ordering.
*/
unsigned char sorted_state[] =
{
0, /* not used */
3, /* sleep */
6, /* run */
2, /* zombie */
4, /* stop */
5, /* start */
7, /* run on a processor */
1 /* being swapped (WAIT) */
};
int
proc_compare (
struct prpsinfo **pp1,
struct prpsinfo **pp2)
{
register struct prpsinfo *p1;
register struct prpsinfo *p2;
register long result;
/* remove one level of indirection */
p1 = *pp1;
p2 = *pp2;
/* compare percent cpu (pctcpu) */
if ((result = (long) (p2->pr_cpu - p1->pr_cpu)) == 0)
{
/* use cpticks to break the tie */
if ((result = p2->pr_time.tv_sec - p1->pr_time.tv_sec) == 0)
{
/* use process state to break the tie */
if ((result = (long) (sorted_state[p2->pr_state] -
sorted_state[p1->pr_state])) == 0)
{
/* use priority to break the tie */
if ((result = p2->pr_oldpri - p1->pr_oldpri) == 0)
{
/* use resident set size (rssize) to break the tie */
if ((result = p2->pr_rssize - p1->pr_rssize) == 0)
{
/* use total memory to break the tie */
result = (p2->pr_size - p1->pr_size);
}
}
}
}
}
return (result);
}
/*
get process table
*/
void
getptable (struct prpsinfo *baseptr)
{
struct prpsinfo *currproc; /* pointer to current proc structure */
int numprocs = 0;
struct dirent *direntp;
for (rewinddir (procdir); direntp = readdir (procdir);)
{
int fd;
if ((fd = open (direntp->d_name, O_RDONLY)) < 0)
continue;
currproc = &baseptr[numprocs];
if (ioctl (fd, PIOCPSINFO, currproc) < 0)
{
(void) close (fd);
continue;
}
numprocs++;
(void) close (fd);
}
if (nproc != numprocs)
nproc = numprocs;
}
/* return the owner of the specified process, for use in commands.c as we're
running setuid root */
uid_t
proc_owner (pid_t pid)
{
register struct prpsinfo *p;
int i;
for (i = 0, p = pbase; i < nproc; i++, p++)
if (p->pr_pid == pid)
return (p->pr_uid);
return (-1);
}
int
setpriority (int dummy, int who, int niceval)
{
int scale;
int prio;
pcinfo_t pcinfo;
pcparms_t pcparms;
tsparms_t *tsparms;
strcpy (pcinfo.pc_clname, "TS");
if (priocntl (0, 0, PC_GETCID, (caddr_t) & pcinfo) == -1)
return (-1);
prio = niceval;
if (prio > PRIO_MAX)
prio = PRIO_MAX;
else if (prio < PRIO_MIN)
prio = PRIO_MIN;
tsparms = (tsparms_t *) pcparms.pc_clparms;
scale = ((tsinfo_t *) pcinfo.pc_clinfo)->ts_maxupri;
tsparms->ts_uprilim = tsparms->ts_upri = -(scale * prio) / 20;
pcparms.pc_cid = pcinfo.pc_cid;
if (priocntl (P_PID, who, PC_SETPARMS, (caddr_t) & pcparms) == -1)
return (-1);
return (0);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.