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/*
* System dependent file for Linux
* By Andy Burgess aab@cichlid.com 6-10-94
* Adapted from s-bsd.c by Chris Siebenmann cks@white.toronto.edu
*/
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <linux/version.h>
#define dprintf if(0)printf
#define MAX_STATES 5
#define MAX_BARS 10
#define MAX_PACKETS_PER_SECOND 200
/* Called at the beginning to inquire how many bars are needed. */
int
num_bars()
{
return 4;
}
/* Called after num_bars to ask for the bar names */
char **
label_bars(nbars)
{ static char *name[MAX_BARS];
int i = 0;
name[i++] = "CPU ";
#ifdef TEST
name[i++] = "Test ";
#endif
name[i++] = "Memory";
name[i++] = "Swap ";
name[i++] = "Ether ";
return name;
}
/*
* Called after the bars are created to perform any machine dependent
* initializations.
*/
int mem, pstat, net;
void
init_bars(nbars)
int nbars;
{
if(nbars >= 1) {
mem = open("/proc/meminfo", O_RDONLY);
if(mem == -1) perror("open /proc/meminfo"), exit(1);
}
if(nbars >= 2) {
pstat = open("/proc/stat", O_RDONLY);
if(pstat == -1) perror("open /proc/stat"), exit(1);
}
if(nbars >= 4) {
net = open("/proc/net/dev", O_RDONLY);
if(net == -1) perror("open /proc/net/dev"), exit(1);
}
}
/*
* This procedure gets called every interval to compute and display the
* bars. It should call draw_bar() with the bar number, the array of
* integer values to display in the bar, and the number of values in
* the array.
*/
void
display_bars(nbars)
int nbars;
{
int spare, len, bar = 0, states[MAX_STATES], nstates, i, status;
int user, nice, system, idle;
static int prev_user, prev_nice, prev_system, prev_idle;
int total, used, free, shared, buffers;
int stotal, sused, sfree;
int rpkt, tpkt, rerr, terr, coll;
static int prev_rpkt, prev_tpkt, prev_rerr, prev_terr, prev_coll;
char *p, buf[5000], dummy[200];
/*
close(mem);
close(pstat);
init_bars();
*/
if(!nbars--)
return;
lseek(pstat, 0, SEEK_SET);
len = read(pstat, buf, sizeof(buf));
buf[len] = 0;
status = sscanf(buf, "%s %d %d %d %d", dummy, &user, &nice, &system, &idle);
dprintf("CPU: %d %d %d %d\n", idle, user, nice, system);
if(status == EOF)
perror("sscanf /proc/stat"), exit(1);
if(status != 5)
fprintf(stderr, "sscanf /proc/stat returned %d\n", status), exit(1);
nstates = 0;
states[nstates++] = idle - prev_idle; /* white */
states[nstates++] = user - prev_user; /* grey */
states[nstates++] = nice - prev_nice; /* dark grey */
states[nstates++] = system - prev_system; /* black */
draw_bar(bar++, states, nstates);
prev_idle = idle;
prev_user = user;
prev_nice = nice;
prev_system = system;
#ifdef TEST
{ static int x = 0;
if(!nbars--)
return;
nstates = 0;
states[nstates++] = 10;
states[nstates++] = x++;
states[nstates++] = x++;
states[nstates++] = x++;
draw_bar(bar++, states, nstates);
}
#endif
if(!nbars--)
return;
lseek(mem, 0, SEEK_SET);
len = read(mem, buf, sizeof(buf));
buf[len] = 0;
status = sscanf(buf, "%*[^\n] %*[^:]: %d %d %d %d %d %*[^:]: %d %d %d",
&total, &used, &free, &shared, &buffers,
&stotal, &sused, &sfree );
if(status != 8) {
fprintf(stderr, "sscanf /proc/meminfo returned %d\nparsing:\n%s\n",
status, buf);
exit(1);
}
if(status == EOF)
perror("fscanf /proc/meminfo"), exit(1);
used -= buffers;
/* big numbers seem to sometimes confuse draw_bar() */
used /= 1000;
free /= 1000;
shared /= 1000;
buffers /= 1000;
dprintf("Memory: %d %d %d %d\n", free, used, shared, buffers);
nstates = 0;
states[nstates++] = free; /* white */
states[nstates++] = buffers; /* grey */
states[nstates++] = 0; /* shared; /* dark grey */
states[nstates++] = used; /* black */
draw_bar(bar++, states, nstates);
if(!nbars--)
return;
sfree /= 1000;
sused /= 1000;
dprintf("Swap: %d %d\n", sfree, sused);
nstates = 0;
states[nstates++] = sfree; /* white */
states[nstates++] = sused; /* grey */
states[nstates++] = 0; /* darkgrey */
states[nstates++] = 0; /* black */
draw_bar(bar++, states, nstates);
/*
Inter-| Receive | Transmit
face |packets errs drop fifo frame|packets errs drop fifo colls carrier
eth0: 436694 0 0 0 0 499043 0 0 0 13 0
*/
if(!nbars--)
return;
lseek(net, 0, SEEK_SET);
len = read(net, buf, sizeof(buf));
buf[len] = 0;
p = buf;
/* find first ethernet/ppp/slip/lo device */
if ((p = strstr(buf, "eth")) ||
(p = strstr(buf, "ppp")) ||
(p = strstr(buf, "sl")) ||
(p = strstr(buf, "lo")))
status = sscanf(p, "%[^:]: %d %d %d %d %d %d %d %d %d %d %d %d",
&dummy,
&rpkt, &rerr, &dummy, &dummy, &dummy,
&tpkt, &terr, &dummy, &dummy, &dummy,
&coll, &dummy );
else /* no network device found */
rpkt = rerr = tpkt = terr = coll = 0;
dprintf("Net: %d %d %d %d %d\n", rpkt, rerr, tpkt, terr, coll);
nstates = 0;
total = rpkt + tpkt + coll - prev_rpkt - prev_tpkt - prev_coll;
spare = MAX_PACKETS_PER_SECOND - total;
if(spare < 0) spare = 0; /* white */
states[nstates++] = spare; /* white */
states[nstates++] = rpkt - prev_rpkt; /* grey */
states[nstates++] = tpkt - prev_tpkt; /* darkgrey */
states[nstates++] = coll - prev_coll; /* black */
draw_bar(bar++, states, nstates);
prev_rpkt = rpkt;
prev_tpkt = tpkt;
prev_coll = coll;
}
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