3BSD/usr/src/cmd/ps.c
/*
* ps - process status
* This is the augmented UCB ps for UCB/VM Unix (9/79)
* examine and print certain things about processes
* usage: ps [acgklrt#uvwx] [corefile] [swapfile] [system]
*/
#include <stdio.h>
#include <a.out.h>
#include <pwd.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/dir.h>
#include <sys/user.h>
#include <sys/pte.h>
#include <sys/vm.h>
#include <sys/text.h>
#include <psout.h>
struct nlist nl[] = {
{ "_proc" },
#define X_PROC 0
{ "_swapdev" },
#define X_SWAPDEV 1
{ "_swplo" },
#define X_SWPLO 2
{ "_Usrptma" },
#define X_USRPTMA 3
{ "_usrpt" },
#define X_USRPT 4
{ "_text" },
#define X_TEXT 5
{ "_nswap" },
#define X_NSWAP 6
{ 0 },
};
struct proc mproc;
struct text text[NTEXT];
#define INTPPG (NBPG/sizeof(int)) /* ints per page */
union {
struct user yy;
int xx[INTPPG][UPAGES];
} zz;
#define clear(x) ((int)x & 0x7fffffff)
#define u zz.yy
int chkpid = 0;
int aflg; /* -a: all processes, not just mine */
int cflg; /* -c: complete listing of args, not just comm. */
int gflg; /* -g: complete listing including group headers, etc */
int kflg; /* -k: read from core file instead of real memory */
int lflg; /* -l: long listing form */
int rflg; /* -r: raw output in style <psout.h> */
int sflg; /* -s: stack depth */
int uflg; /* -u: user name */
int vflg; /* -v: virtual memory statistics */
int wflg; /* -w[w]: wide terminal */
int xflg; /* -x: ALL processes, even those without ttys */
int login; /* -: this is a login shell */
char *tptr;
char *gettty();
int pscomp();
struct pte pagetbl[NPTEPG];
int kmem;
int mem;
int swap;
daddr_t swplo;
int nswap;
int Usrptma;
int usrpt;
int ndev;
struct devl {
char dname[DIRSIZ];
dev_t dev;
} devl[256];
struct psout outargs[NPROC]; /* info for first npr processes */
int npr; /* number of processes found so far */
int argwidth; /* number of chars of args to print */
char *coref;
main(argc, argv)
char **argv;
{
int i;
char *ap;
int uid, puid;
char obuf[BUFSIZ];
register struct nlist *nlp;
setbuf(stdout, obuf);
argc--, argv++;
if (argc>0) {
ap = argv[0];
while (*ap) switch (*ap++) {
case '-':
break;
case 'a':
aflg++;
break;
case 'c':
cflg++;
break;
case 'g':
gflg++;
break;
case 'k':
kflg++;
break;
case 'l':
lflg++;
break;
case 'r':
rflg++;
break;
case 's':
sflg++;
break;
case 't':
if(*ap)
tptr = ap;
aflg++;
gflg++;
if (*tptr == '?')
xflg++;
while (*ap)
ap++;
break;
case 'u':
uflg++;
break;
case 'v':
vflg++;
break;
case 'w':
wflg++;
break;
case 'x':
xflg++;
break;
default:
chkpid=atoi(--ap);
*ap = '\0';
aflg++;
xflg++;
break;
}
}
coref = "/dev/kmem";
if(kflg)
coref = argc > 1 ? argv[1] : "/vmcore";
if ((kmem = open(coref, 0)) < 0) {
perror(coref);
done(1);
}
if ((mem = open("/dev/mem", 0)) < 0) {
fprintf(stderr, "No mem\n");
done(1);
}
if (kflg)
mem = kmem;
if ((swap = open(argc>2 ? argv[2]: "/dev/drum", 0)) < 0) {
fprintf(stderr, "Can't open /dev/drum\n");
done(1);
}
nlist(argc>3 ? argv[3] : "/vmunix", nl);
if (nl[0].n_type==0) {
fprintf(stderr, "No namelist\n");
done(1);
}
if(chdir("/dev") < 0) {
fprintf(stderr, "Can't change to /dev\n");
done(1);
}
if (kflg)
for (nlp= nl; nlp < &nl[sizeof (nl)/sizeof (nl[0])]; nlp++)
nlp->n_value &= 0x7ffffffff;
Usrptma = nl[X_USRPTMA].n_value;
usrpt = nl[X_USRPT].n_value;
/*
* read kmem to find swap dev.
*/
lseek(kmem, (long)nl[X_SWAPDEV].n_value, 0);
read(kmem, &nl[X_SWAPDEV].n_value, sizeof(nl[X_SWAPDEV].n_value));
/*
* Find base and size of swap
*/
lseek(kmem, (long)nl[X_SWPLO].n_value, 0);
read(kmem, &swplo, sizeof(swplo));
lseek(kmem, (long)nl[X_NSWAP].n_value, 0);
read(kmem, &nswap, sizeof (nswap));
/*
* If v flag get text table
*/
if (vflg) {
lseek(kmem, (long)nl[X_TEXT].n_value, 0);
read(kmem, text, sizeof (text));
}
if (kflg)
swplo = 0;
getdev();
uid = getuid();
if (sflg + lflg + vflg + uflg > 1) {
printf("Cannot combine s, l, v, and/or u.\n");
exit(1);
}
/* different psout widths depending on how much printed & w flag */
if (wflg <= 1) {
argwidth = 63;
if (wflg) argwidth += 52; /* 132 col term */
if (lflg) argwidth -= 49; /* extra junk printed */
if (vflg) argwidth -= 48; /* extra junk for -v */
if (sflg) argwidth -= 4; /* 4 cols of stack size */
if (uflg) argwidth -= 27; /* user name */
} else argwidth = 127;
if (rflg)
; /* No heading for raw output */
else if (lflg)
printf(" F S UID PID PPID CPU PRI NICE ADDR SZ RSS WCHAN TTY TIME COMMAND\n");
else if (vflg)
printf("F PID TT TIME TIM SL MINFLT MAJFLT SIZE RSS SRS TSIZ TRS PF COMMAND\n");
else if (uflg)
printf("USER PID %%CPU NICE SZ RSS TTY TIME COMMAND\n");
else if (chkpid==0) {
if (sflg)
printf(" SSIZ");
printf(" PID TTY TIME COMMAND\n");
}
fflush(stdout);
for (i=0; i<NPROC; i++) {
lseek(kmem, (long)(nl[X_PROC].n_value+i*(sizeof mproc)), 0);
read(kmem, &mproc, sizeof mproc);
/* skip processes that don't exist */
if (mproc.p_stat==0)
continue;
/* skip those without a tty unless -x */
if (mproc.p_pgrp==0 && xflg==0)
continue;
/* skip group leaders on a tty unless -g, -x, or -t.. */
if (!gflg && !xflg && !tptr && mproc.p_pid == mproc.p_pgrp)
continue;
/* -g also skips those where **argv is "-" - see savcom */
puid = mproc.p_uid;
/* skip other peoples processes unless -a or a specific pid */
if ((uid != puid && aflg==0) ||
(chkpid!=0 && chkpid!=mproc.p_pid))
continue;
if (savcom(puid))
npr++;
}
fixup(npr);
for (i=0; i<npr; i++)
if (prcom(&outargs[i])) {
putchar('\n');
fflush(stdout);
}
done(!npr);
}
getdev()
{
#include <sys/stat.h>
register FILE *df;
struct stat sbuf;
struct direct dbuf;
if ((df = fopen("/dev", "r")) == NULL) {
fprintf(stderr, "Can't open /dev\n");
done(1);
}
ndev = 0;
while (fread(&dbuf, sizeof(dbuf), 1, df) == 1) {
if(dbuf.d_ino == 0)
continue;
if(stat(dbuf.d_name, &sbuf) < 0)
continue;
if ((sbuf.st_mode&S_IFMT) != S_IFCHR)
continue;
strcpy(devl[ndev].dname, dbuf.d_name);
devl[ndev].dev = sbuf.st_rdev;
ndev++;
}
fclose(df);
}
savcom(puid)
{
int abuf[INTPPG];
long addr;
register int *ip;
register struct psout *a;
register char *cp, *cp1;
long tm;
int cc, nbad;
int szpt, p0br;
register char *tp;
struct dblock db;
struct pte apte;
/* skip long sleeping or dead processes if -v unless -g or -x */
if (!gflg && vflg && !xflg) {
switch (mproc.p_stat) {
case SSLEEP:
case SSTOP:
if (mproc.p_slptime > MAXSLP)
return (0);
break;
case SRUN:
case SIDL:
break;
case SZOMB:
return (0);
}
}
/* read in the user structure */
if ((mproc.p_flag& SLOAD ) == 0) {
/* not loaded - get from swap */
addr = (mproc.p_swaddr+swplo)<<9;
lseek(swap, addr, 0);
if (read(swap, &u, sizeof(u)) != sizeof(u))
return(0);
} else {
/* loaded, get each page from memory separately */
for(cc=0; cc<UPAGES; cc++) { /* get u area */
int upage = ctob(mproc.p_addr[cc]);
lseek(mem,upage,0);
if (read(mem,((int *)&u)+INTPPG*cc,NBPG) != NBPG)
return(0);
}
}
tp = gettty();
if (tptr && strcmpn(tptr, tp, 2))
return(0);
a = &outargs[npr];
/* saving com starts here */
a->o_uid = puid;
a->o_pid = mproc.p_pid;
a->o_flag = mproc.p_flag;
a->o_ppid = mproc.p_ppid;
a->o_cpu = mproc.p_cpu;
a->o_pctcpu = 0.0; /* This needs to be fixed later */
a->o_pri = mproc.p_pri;
a->o_nice = mproc.p_nice;
a->o_addr0 = mproc.p_addr[0];
a->o_dsize = mproc.p_dsize;
a->o_ssize = mproc.p_ssize;
a->o_rssize = mproc.p_rssize;
a->o_swrss = mproc.p_swrss;
a->o_wchan = mproc.p_wchan;
a->o_pgrp = mproc.p_pgrp;
a->o_tty[0] = tp[0];
a->o_tty[1] = tp[1] ? tp[1] : ' ';
a->o_ttyd = u.u_ttyd;
a->o_stat = mproc.p_stat;
a->o_flag = mproc.p_flag;
if (a->o_stat==SZOMB) return(1);
a->o_utime = u.u_utime;
a->o_stime = u.u_stime;
a->o_cutime = u.u_cutime;
a->o_cstime = u.u_cstime;
a->o_sigs = u.u_signal[SIGINT] + u.u_signal[SIGQUIT];
a->o_time = mproc.p_time;
a->o_slptime = mproc.p_slptime;
a->o_uname[0] = 0;
if (sflg) {
for (cp = (char *)u.u_stack; cp < (char *)&u + ctob(UPAGES); cp++)
if (*cp)
break;
a->o_stksize = (int) ((char *)&u + ctob(UPAGES) - cp);
}
if (mproc.p_stat==SZOMB) return(1);
if (vflg) {
register struct text *xp;
if (mproc.p_textp) {
xp = &text[mproc.p_textp - (struct text *)nl[5].n_value];
a->o_xsize = xp->x_size;
a->o_xrssize = xp->x_rssize;
} else {
a->o_xsize = 0;
a->o_xrssize = 0;
}
a->o_aveflt = mproc.p_aveflt;
a->o_minorflt = u.u_minorflt;
a->o_majorflt = u.u_majorflt;
}
strcpy(a->o_comm, u.u_comm);
if (cflg)
return (1);
a->o_args[0] = 0; /* in case of early return */
if ((mproc.p_flag & SLOAD) == 0) {
vstodb(0, 1, &u.u_smap, &db, 1);
addr = ctob(swplo + db.db_base);
lseek(swap, addr, 0);
if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf))
goto garbage;
} else {
szpt = u.u_pcb.pcb_szpt;
p0br = kflg ? clear((int)mproc.p_p0br) : (int)mproc.p_p0br;
cc = Usrptma + (p0br + NBPG*(szpt-1) - usrpt)/NPTEPG;
lseek(kmem, cc, 0);
if (read(kmem, &apte, sizeof(apte)) != sizeof(apte))
goto garbage;
lseek(mem, ctob(apte.pg_pfnum), 0);
if (read(mem,pagetbl,sizeof(pagetbl)) != sizeof(pagetbl))
goto garbage;
if (pagetbl[NPTEPG-1].pg_fod == 0 && pagetbl[NPTEPG-1].pg_pfnum) {
lseek(mem,ctob((pagetbl[NPTEPG-1].pg_pfnum)),0);
if (read(mem,abuf,sizeof(abuf)) != sizeof(abuf))
goto garbage;
} else {
vstodb(0, 1, &u.u_smap, &db, 1);
addr = ctob(swplo + db.db_base);
lseek(swap, addr, 0);
if (read(swap, abuf, sizeof(abuf)) != sizeof(abuf))
goto garbage;
}
}
abuf[INTPPG] = 0;
for (ip = &abuf[INTPPG-2]; ip > abuf;) {
if (*--ip == -1 || *ip == 0) {
cp = (char *)(ip+1);
if (*cp==0)
cp++;
nbad = 0;
for (cp1 = cp; cp1 < (char *)&abuf[INTPPG]; cp1++) {
cc = *cp1&0177;
if (cc==0)
*cp1 = ' ';
else if (cc < ' ' || cc > 0176) {
if (++nbad >= 5) {
*cp1++ = ' ';
break;
}
*cp1 = '?';
} else if (cc=='=') {
*cp1 = 0;
while (cp1>cp && *--cp1!=' ')
*cp1 = 0;
break;
}
}
while (*--cp1==' ')
*cp1 = 0;
strcpy(a->o_args, cp);
garbage:
cp = a->o_args;
if (cp[0]=='-'&&cp[1]<=' ' || cp[0]=='?' || cp[0]<=' ') {
strcat(cp, " (");
strcat(cp, u.u_comm);
strcat(cp, ")");
}
cp[127] = 0; /* max room in psout is 128 chars */
if (xflg || gflg || tptr || cp[0]!='-')
return(1);
return(0);
}
}
goto garbage;
}
prcom(a)
register struct psout *a;
{
long tm;
if (rflg) {
write(1, a, sizeof (*a));
return(0);
}
if (lflg) {
printf("%4x %c", 0xffff & a->o_flag,
"0SWRIZT"[a->o_stat]);
printf("%4d", a->o_uid);
} else if (vflg) {
switch (a->o_stat) {
case SSLEEP:
case SSTOP:
if ((a->o_flag & SLOAD) == 0)
printf("W");
else if (a->o_pri >= PZERO)
printf("S");
else if (a->o_flag & SPAGE)
printf("P");
else
printf("D");
break;
case SRUN:
case SIDL:
if (a->o_flag & SLOAD)
printf("R");
else
printf("W");
break;
}
if (a->o_nice > NZERO)
printf("N");
else
printf(" ");
} else if (uflg) {
printf("%-8.8s", a->o_uname);
}
if (sflg) {
printf("%5d", a->o_stksize);
}
printf("%6u", a->o_pid);
if (lflg)
printf("%6u%4d%4d%4d%6x", a->o_ppid, a->o_cpu&0377,
a->o_pri, a->o_nice, a->o_addr0);
else if (uflg)
printf("%5.1f%4d ", a->o_pctcpu, a->o_nice);
if (lflg || uflg)
printf("%4d%5d", a->o_dsize+a->o_ssize, a->o_rssize);
if (lflg)
if (a->o_wchan)
printf("%6x", clear(a->o_wchan));
else
printf(" ");
printf(" %-2.2s", a->o_tty);
if (a->o_stat==SZOMB) {
printf(" <defunct>");
return(1);
}
tm = (a->o_utime + a->o_stime + 30)/60;
printf("%3ld:", tm/60);
tm %= 60;
printf(tm<10?"0%ld":"%ld", tm);
if (vflg) {
/*
tm = (a->o_stime + 30) / 60;
printf(" %2ld:", tm/60);
tm %= 60;
printf(tm<10?"0%ld":"%ld", tm);
*/
printf("%4d%3d", a->o_time, a->o_slptime);
}
#ifdef notdef
if (0 && lflg==0) { /* 0 == old tflg (print long times) */
tm = (a->o_cstime + 30)/60;
printf(" %2ld:", tm/60);
tm %= 60;
printf(tm<10?"0%ld":"%ld", tm);
tm = (a->o_cutime + 30)/60;
printf(" %2ld:", tm/60);
tm %= 60;
printf(tm<10?"0%ld":"%ld", tm);
}
#endif
if (vflg) {
printf("%7d%7d",a->o_minorflt,a->o_majorflt);
printf("%5d%4d%4d", a->o_dsize+a->o_ssize, a->o_rssize, a->o_swrss);
printf("%5d%4d", a->o_xsize, a->o_xrssize);
printf("%3d", a->o_aveflt);
}
if (a->o_pid == 0) {
printf(" swapper");
return(1);
}
if (a->o_pid == 2) {
printf(" pagedaemon");
return(1);
}
if (cflg) {
printf(" %s", a->o_comm);
return(1);
}
a -> o_args[argwidth] = 0; /* force it to quit early */
printf(" %s", a->o_args);
return (1);
}
char *
gettty()
{
register i;
register char *p;
if (u.u_ttyp==0)
return("?");
for (i=0; i<ndev; i++) {
if (devl[i].dev == u.u_ttyd) {
p = devl[i].dname;
if (p[0]=='t' && p[1]=='t' && p[2]=='y')
p += 3;
return(p);
}
}
return("?");
}
/*
* Given a base/size pair in virtual swap area,
* return a physical base/size pair which is the
* (largest) initial, physically contiguous block.
*/
vstodb(vsbase, vssize, dmp, dbp, rev)
register int vsbase;
int vssize;
struct dmap *dmp;
register struct dblock *dbp;
{
register int blk = DMMIN;
register swblk_t *ip = dmp->dm_map;
if (vsbase < 0 || vsbase + vssize > dmp->dm_size)
panic("vstodb");
while (vsbase >= blk) {
vsbase -= blk;
if (blk < DMMAX)
blk *= 2;
ip++;
}
if (*ip <= 0 || *ip + blk > nswap)
panic("vstodb *ip");
dbp->db_size = min(vssize, blk - vsbase);
dbp->db_base = *ip + (rev ? blk - (vsbase + dbp->db_size) : vsbase);
}
panic(cp)
char *cp;
{
#ifdef DEBUG
printf("%s\n", cp);
#endif
}
min(a, b)
{
return (a < b ? a : b);
}
done(exitno)
{
if (login) {
printf("Press return when done: ");
getchar();
}
exit(exitno);
}
/*
* fixup figures out everybodys name and sorts into a nice order.
*/
fixup(np) int np; {
register int i;
register struct passwd *pw;
struct passwd *getpwent();
if (uflg) {
/*
* If we want names, traverse the password file. For each
* passwd entry, look for it in the processes.
* In case of multiple entries in /etc/passwd, we believe
* the first one (same thing ls does).
*/
while ((pw=getpwent()) != NULL) {
for (i=0; i<np; i++)
if (outargs[i].o_uid == pw -> pw_uid) {
if (outargs[i].o_uname[0] == 0)
strcpy(outargs[i].o_uname, pw -> pw_name);
}
}
}
qsort(outargs, np, sizeof(outargs[0]), pscomp);
}
pscomp(x1, x2) struct psout *x1, *x2; {
register int c;
c = (x1)->o_ttyd - (x2)->o_ttyd;
if (c==0) c = (x1)->o_pid - (x2)->o_pid;
return(c);
}