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/*
* top - a top users display for Unix
*
* THIS IS A TEMPLATE FILE FOR A MACHINE DEPENDENT (m_...c) FILE
*
* SYNOPSIS: one line description of machine this module works with
*
* DESCRIPTION:
* Detailed description of this machine dependent module.
* It can be multiple lines, but a blank comment line (one with only an
* asterisk) is considered to end it. Place here a complete list of
* the machines and OS versions that this module works on.
*
* LIBS: list of special libraries to include at link step (REMOVE THIS LINE IF NOT NEEDED)
*
* AUTHOR: your name and <your@internet.address>
*/
#include "top.h"
#include "machine.h"
/*
* 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%6dK %4dK %-5s%4d:%02d %5.2f%% %5.2f%% %.14s"
/* these are for detailing the process states */
int process_states[?];
char *procstatenames[] = {
"", " sleeping, ", " ABANDONED, ", " running, ", " starting, ",
" zombie, ", " stopped, ",
NULL
};
/* these are for detailing the cpu states */
int cpu_states[?];
char *cpustatenames[] = {
"user", "nice", "system", "idle",
NULL
};
/* these are for detailing the memory statistics */
int memory_stats[?];
char *memorynames[] = {
"K available, ", "K in use, ", "K free, ", "K locked", NULL
};
/* useful externals */
extern int errno;
extern char *sys_errlist[];
long lseek();
long time();
long percentages();
machine_init(statics)
struct statics *statics;
{
return(0);
}
char *format_header(uname_field)
register char *uname_field;
{
register char *ptr;
ptr = header + UNAME_START;
while (*uname_field != '\0')
{
*ptr++ = *uname_field++;
}
return(header);
}
get_system_info(si)
struct system_info *si;
{
}
static struct handle handle;
caddr_t get_process_info(si, sel, compare)
struct system_info *si;
struct process_select *sel;
int (*compare)();
{
return((caddr_t)&handle);
}
char fmt[128]; /* static area where result is built */
/* define what weighted cpu is. */
#define weighted_cpu(pct, pp) ((pp)->p_time == 0 ? 0.0 : \
((pct) / (1.0 - exp((pp)->p_time * logcpu))))
char *format_next_process(handle, get_userid)
caddr_t handle;
char *(*get_userid)();
{
return(fmt);
}
/*
* 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).
*
*/
getkval(offset, ptr, size, refstr)
unsigned long offset;
int *ptr;
int size;
char *refstr;
{
if (kvm_read(kd, offset, ptr, size) != size)
{
if (*refstr == '!')
{
return(0);
}
else
{
fprintf(stderr, "top: kvm_read for %s: %s\n",
refstr, sys_errlist[errno]);
quit(23);
}
}
return(1);
}
/* comparison routine for qsort */
/* NOTE: this is specific to the BSD proc structure, but it should
give you a good place to start. */
/*
* 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.
*/
static unsigned char sorted_state[] =
{
0, /* not used */
3, /* sleep */
1, /* ABANDONED (WAIT) */
6, /* run */
5, /* start */
2, /* zombie */
4 /* stop */
};
proc_compare(pp1, pp2)
struct proc **pp1;
struct proc **pp2;
{
register struct proc *p1;
register struct proc *p2;
register int result;
register pctcpu lresult;
/* remove one level of indirection */
p1 = *pp1;
p2 = *pp2;
/* compare percent cpu (pctcpu) */
if ((lresult = p2->p_pctcpu - p1->p_pctcpu) == 0)
{
/* use cpticks to break the tie */
if ((result = p2->p_cpticks - p1->p_cpticks) == 0)
{
/* use process state to break the tie */
if ((result = sorted_state[p2->p_stat] -
sorted_state[p1->p_stat]) == 0)
{
/* use priority to break the tie */
if ((result = p2->p_pri - p1->p_pri) == 0)
{
/* use resident set size (rssize) to break the tie */
if ((result = p2->p_rssize - p1->p_rssize) == 0)
{
/* use total memory to break the tie */
result = PROCSIZE(p2) - PROCSIZE(p1);
}
}
}
}
}
else
{
result = lresult < 0 ? -1 : 1;
}
return(result);
}
proc_owner(pid)
int pid;
{
/* returns uid of owner of process pid */
return(uid);
}
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