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#include <u.h>
#include <libc.h>
#include <bio.h>
void ps(char*);
void error(char*);
int cmp(void*, void*);
Biobuf bout;
int pflag;
int aflag;
int rflag;
void
main(int argc, char *argv[])
{
int fd, i, tot, none = 1;
Dir *dir, **mem;
ARGBEGIN {
case 'a':
aflag++;
break;
case 'p':
pflag++;
break;
case 'r':
rflag++;
break;
} ARGEND;
Binit(&bout, 1, OWRITE);
if(chdir("/proc")==-1)
error("/proc");
fd=open(".", OREAD);
if(fd<0)
error("/proc");
tot = dirreadall(fd, &dir);
if(tot <= 0){
fprint(2, "ps: empty directory /proc\n");
exits("empty");
}
mem = malloc(tot*sizeof(Dir*));
for(i=0; i<tot; i++)
mem[i] = dir++;
qsort(mem, tot, sizeof(Dir*), cmp);
for(i=0; i<tot; i++){
ps(mem[i]->name);
none = 0;
}
if(none)
error("no processes; bad #p");
exits(0);
}
void
ps(char *s)
{
ulong utime, stime, rtime, size;
int argc, basepri, fd, i, n, pri;
char args[256], *argv[16], buf[64], pbuf[8], rbuf[20], rbuf1[20], status[4096];
sprint(buf, "%s/status", s);
fd = open(buf, OREAD);
if(fd<0)
return;
n = read(fd, status, sizeof status-1);
close(fd);
if(n <= 0)
return;
status[n] = '\0';
if((argc = tokenize(status, argv, nelem(argv)-1)) < 12)
return;
argv[argc] = 0;
/*
* 0 text
* 1 user
* 2 state
* 3 cputime[6]
* 9 memory
* 10 basepri
* 11 pri
*/
utime = strtoul(argv[3], 0, 0)/1000;
stime = strtoul(argv[4], 0, 0)/1000;
rtime = strtoul(argv[5], 0, 0)/1000;
size = strtoul(argv[9], 0, 0);
if(pflag){
basepri = strtoul(argv[10], 0, 0);
pri = strtoul(argv[11], 0, 0);
sprint(pbuf, " %2d %2d", basepri, pri);
} else
pbuf[0] = 0;
if(rflag){
if(rtime >= 86400)
sprint(rbuf, " %lud:%02lud:%02lud:%02lud", rtime/86400, (rtime/3600)%24, (rtime/60)%60, rtime%60);
else if(rtime >= 3600)
sprint(rbuf, " %lud:%02lud:%02lud", rtime/3600, (rtime/60)%60, rtime%60);
else
sprint(rbuf, " %lud:%02lud", rtime/60, rtime%60);
sprint(rbuf1, "%12s", rbuf);
}else
rbuf1[0] = 0;
Bprint(&bout, "%-10s %8s%s %4lud:%.2lud %3lud:%.2lud %s %7ludK %-8.8s ",
argv[1],
s,
rbuf1,
utime/60, utime%60,
stime/60, stime%60,
pbuf,
size,
argv[2]);
if(aflag == 0){
Noargs:
Bprint(&bout, "%s\n", argv[0]);
return;
}
sprint(buf, "%s/args", s);
fd = open(buf, OREAD);
if(fd < 0)
goto Badargs;
n = read(fd, args, sizeof args-1);
close(fd);
if(n < 0)
goto Badargs;
if(n == 0)
goto Noargs;
args[n] = '\0';
for(i=0; i<n; i++)
if(args[i] == '\n')
args[i] = ' ';
Bprint(&bout, "%s\n", args);
return;
Badargs:
Bprint(&bout, "%s ?\n", argv[0]);
}
void
error(char *s)
{
fprint(2, "ps: %s: ", s);
perror("error");
exits(s);
}
int
cmp(void *va, void *vb)
{
Dir **a, **b;
a = va;
b = vb;
return atoi((*a)->name) - atoi((*b)->name);
}
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