/*
** Copyright (c) 1986, 1994, 1996, 2000, 2002
** Jeff Forys (jeffware@marjum.com). All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that: (1) Redistributions of
** source code must retain the above copyright notice, this list of
** conditions and the following disclaimer, (2) Redistributions in
** binary form must reproduce the above copyright notice, this list
** of conditions and the following disclaimer in the documentation
** and/or other materials provided with the distribution, (3) All
** advertising materials mentioning features or use of this software
** must display the following acknowledgment: ``This product includes
** software developed by Jeff Forys (jeffware@marjum.com).'', (4)
** The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
** WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char rcsid[] = "$Id: irix-3.c,v 1.12 2005/04/06 23:49:35 forys Exp $";
#endif
#define NO_MEXTERN
#include "conf.h"
#undef NO_MEXTERN
#include <sys/dir.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <stdio.h>
/*
* Define SigNames, NSig, and TtyDevDir here; they are used by other
* routines and must be global. Everyone seems to have their own
* idea as to what NSIG should be. Here, `NSig' is the number of
* signals available, not counting zero.
*/
char *SigMap[] = { "0",
"HUP", "INT", "QUIT", "ILL", "TRAP", "IOT", /* 1 - 6 */
"EMT", "FPE", "KILL", "BUS", "SEGV", "SYS", /* 7 - 12 */
"PIPE", "ALRM", "TERM", "USR1", "USR2", "CHLD", /* 13 - 18 */
"PWR", "STOP", "TSTP", "POLL", "IO", "URG", /* 19 - 24 */
"WINCH", "VTALRM", "PROF", "CONT", "TTIN", "TTOU", /* 25 - 30 */
"XCPU", "XFSZ", /* 31 - 32 */
};
int NSig = NUMSIGS;
#define SETCMD(dst,src,maxlen) { \
extern char *rindex(); \
if (maxlen > 0) src[maxlen] = '\0'; \
dst = (dst = rindex(src, '/')) ? ++dst: src; \
}
static char *TtyDevDir = "/dev";
int Skill; /* set 1 if running `skill', 0 if `snice' */
int PrioMin, PrioMax; /* min and max process priorities */
int SigPri; /* signal to send or priority to set */
pid_T MyPid; /* pid of this process */
uid_T MyUid; /* uid of this process */
char *ProgName; /* program name */
/*
* This is the machine-dependent initialization routine.
*
* - The following global variables must be initialized:
* MyPid, MyUid, ProgName, Skill, PrioMin, PrioMax, SigPri
* - The working directory will be changed to that which contains the
* tty devices (`TtyDevDir'); this makes argument parsing go faster.
* - If possible, this routine should raise the priority of this process.
*/
void
MdepInit(pname)
char *pname;
{
extern char *rindex(), *SysErr();
MyPid = (pid_T) getpid();
MyUid = (uid_T) getuid();
SETCMD(ProgName, pname, 0)
/*
* If we are running as root, raise our priority to better
* catch runaway processes.
*/
if (MyUid == ROOTUID)
(void) setpriority(PRIO_PROCESS, MyPid, PRIO_MIN);
/*
* Determine what we are doing to processes we find. We will
* either send them a signal (skill), or renice them (snice).
*/
Skill = (strcmp(ProgName, "snice") != 0);
/*
* chdir to `TtyDevDir' to speed up tty argument parsing.
*/
if (chdir(TtyDevDir) < 0) {
fprintf(stderr, "%s: chdir(%s): %s\n", ProgName, TtyDevDir,
SysErr());
exit(EX_SERR);
}
/*
* Set up minimum and maximum process priorities.
* Initialize SigPri to either default signal (`skill') or
* default priority (`snice').
*/
PrioMin = PRIO_MIN;
PrioMax = PRIO_MAX;
SigPri = Skill? SIGTERM: 4;
}
/*
* Carry out an action on a particular process. If this is `skill',
* then send the process a signal, otherwise this is `snice' so change
* it's priority.
*
* If 0 is returned, the operation was successful, otherwise -1 is
* returned and `errno' set.
*/
int
MdepAction(pid)
pid_T pid;
{
if (Skill)
return(kill((int)pid, SigPri));
else
return(setpriority(PRIO_PROCESS, (int)pid, SigPri));
}
/* disable regular expresions: regex(3) availability unknown */
NULL_REGEX_FUNCS
/*
* Now, set up everything we need to write a GetProc() routine.
*/
#include <sys/immu.h>
#include <sys/swap.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <nlist.h>
static char *kmemf = "/dev/kmem"; /* window into kernel virtual memory */
static char *memf = "/dev/mem"; /* window into physical memory */
static char *kernf = "/unix"; /* kernel image */
static char *devdskf = "/dev/dsk"; /* where swap devices can be found */
static int kmem = 0, mem = 0;
static struct nlist nl[] = {
{ "v" },
#define X_VAR 0
{ "proc" },
#define X_PROC 1
{ "swaptab" },
#define X_SWAPTAB 2
{ "" },
#define X_LAST 3
};
static int nproc = -1;
static struct proc *procp;
static swpt_t swtab[MSFILES]; /* available swap devices */
static dev_t swdev[MSFILES]; /* opened swap devices */
#define NPROCS 32 /* number of procs to read at once */
static char *pidmap[] = { "sched", "init", "vhand", "bdflush" };
static int pidmapsiz = sizeof(pidmap) / sizeof(pidmap[0]);
extern off_t lseek();
/*
* GetProc()
*
* Fill in and return a `struct ProcInfo' with information about the
* next process. If no processes are left, return NULL.
*
* Fflag support:
* If Fflag is set we will try to avoid reading in the user struct
* and locating/opening the swap device(s).
* We can do this only if Iflag, TtyIndx, and CmdIndx are zero.
*/
struct ProcInfo *
GetProc()
{
extern char *SysErr();
static struct user *GetUser();
static struct proc procs[NPROCS], *procsp;
static struct ProcInfo procinfo;
static struct var var;
register struct user *auser;
register struct proc *aproc;
static int thisproc = 0;
static int needuser = 1; /* Fflag support */
/*
* If this is our first time here, open various files,
* and set up the nlist.
*/
if (nproc == -1) {
char *errstr = "%s: %s: %s\n";
int nfound;
if ((kmem=open(kmemf, 0)) < 0) { /* open kmem */
fprintf(stderr, errstr, ProgName, kmemf, SysErr());
exit(EX_SERR);
}
if ((mem=open(memf, 0)) < 0) { /* open mem */
fprintf(stderr, errstr, ProgName, memf, SysErr());
exit(EX_SERR);
}
if ((nfound=nlist(kernf, nl)) < 0) { /* kernel name list */
fprintf(stderr, errstr, ProgName, kernf,"no name list");
exit(EX_SERR);
}
if (nfound != 0) {
register int i;
fprintf(stderr, "%s: nlist: unresolved symbols:",
ProgName);
for (i = 0; i < X_LAST; i++)
if (nl[i].n_type == 0)
fprintf(stderr, " %s", nl[i].n_name);
(void) putc('\n', stderr);
exit(EX_SERR);
}
GetStruct((off_t)svirtophys(nl[X_VAR].n_value), "var",
(off_t)&var, sizeof(var));
GetStruct((off_t)svirtophys(nl[X_SWAPTAB].n_value), "swaptab",
(off_t)swtab, sizeof(swtab));
procp = (struct proc *)svirtophys(nl[X_PROC].n_value);
nproc = var.v_proc;
/*
* We run faster without finding/opening the swap devices
* and reading in the user struct; the price is incomplete
* information for errors (no cmd).
*/
if (Fflag && Iflag == 0 && TtyIndx == 0 && CmdIndx == 0)
needuser = 0;
else
OpenSwapDevs();
}
/*
* Read in NPROCS proc structures at-a-time. Decrement `nproc'
* by the number of proc structures we have read; when it reaches
* zero, we are finished (return NULL).
*/
do {
while (thisproc == 0) {
int nread;
int psize;
if (nproc == 0)
return((struct ProcInfo *)NULL);
thisproc = MIN(NPROCS, nproc);
psize = thisproc * sizeof(struct proc);
nproc -= thisproc;
if (lseek(kmem, (off_t)procp, L_SET) == -1 ||
(nread = read(kmem, (char *)procs, psize)) < 0) {
fprintf(stderr, "%s: read proc: %s\n",
ProgName, SysErr());
return((struct ProcInfo *)NULL);
} else if (nread != psize) {
thisproc = nread / sizeof(struct proc);
nproc = 0;
fprintf(stderr, "%s: read proc: short read\n",
ProgName);
}
procsp = procs;
procp += thisproc;
}
aproc = procsp++;
thisproc--;
if (aproc->p_stat != 0) {
/*
* Before we go through the trouble of reading
* in the user struct, let's make sure this isn't
* a "zombie" or "exiting" process. If it is,
* we have all the information we need; fill in
* procinfo and return.
*/
procinfo.pi_flags = 0;
procinfo.pi_pid = (pid_T) aproc->p_pid;
procinfo.pi_uid = (uid_T) aproc->p_uid;
if (aproc->p_stat == SZOMB) { /* zombie */
static char *zombie = "<defunct>";
procinfo.pi_flags |= PI_ZOMBIE;
procinfo.pi_cmd = zombie;
} else if (aproc->p_flag & SEXIT) { /* exiting */
static char *exiting = "<exiting>";
procinfo.pi_flags |= PI_SWEXIT;
procinfo.pi_cmd = exiting;
} else if (!needuser) { /* Fflag */
static char *fflagcmd = "<-f>";
procinfo.pi_cmd = fflagcmd;
}
if (procinfo.pi_flags || !needuser)
return(&procinfo);
else
auser = GetUser(aproc);
}
} while (aproc->p_stat == 0 || auser == NULL);
/*
* We now have a process (`aproc') and a user (`auser').
* Fill in the rest of `procinfo'.
*/
if (auser->u_ttyp != 0) { /* has a controlling tty */
procinfo.pi_flags |= PI_CTLTTY;
procinfo.pi_tty = (tty_T) auser->u_ttyd;
}
if (aproc->p_pid < pidmapsiz) { /* special */
procinfo.pi_cmd = pidmap[aproc->p_pid];
procinfo.pi_flags |= PI_ASKUSR;
} else /* set path-stripped command name */
SETCMD(procinfo.pi_cmd, auser->u_comm, PSCOMSIZ)
return(&procinfo);
}
#define SKRD(file, src, dst, size) \
(lseek(file, (off_t)(src), L_SET) == -1) || \
(read(file, (char *)(dst), (size)) != (size))
GetStruct(loc, name, dest, size)
off_t loc;
char *name;
off_t dest;
int size;
{
if (SKRD(kmem, loc, dest, size)) {
fprintf(stderr, "%s: can't read %s struct at %lx in %s\n",
ProgName, name, (u_long)loc, kmemf);
exit(EX_SERR);
}
}
/*
* OpenSwapDevs()
*
* Locate and open all the swap devices currently configured.
* The opened file descriptors are saved in `swdev[i]'.
*
* Side Effect: this routine does a chdir(devdskf).
*/
OpenSwapDevs()
{
extern char *SysErr();
struct stat statb;
register DIR *devdsk;
register struct direct *dp;
register char *flnm;
register int i, keeplooking = 1;
/*
* Initialize all file descriptors to "unopened".
*/
for (i = 0; i < MSFILES; i++)
swdev[i] = -1;
/*
* Relocate our current working directory to `devdskf' and open
* the directory for reading it's contents.
*/
if (chdir(devdskf) < 0) {
fprintf(stderr, "%s: can't change dir to %s: %s\n",
ProgName, devdskf, SysErr());
return;
}
if ((devdsk = opendir(".")) == NULL) {
fprintf(stderr, "%s: can't open %s: %s\n",
ProgName, devdskf, SysErr());
return;
}
/*
* For each directory entry, if it is one of our swap devices,
* try to open it.
*/
while ((dp = readdir(devdsk)) != NULL && keeplooking) {
flnm = dp->d_name;
if (stat(flnm, &statb) < 0) /* who knows, who cares... */
continue;
keeplooking = 0;
for (i = 0; i < MSFILES; i++) {
if (swdev[i] < 0 && S_ISBLK(statb.st_mode) &&
swtab[i].st_dev == statb.st_rdev)
if ((swdev[i] = open(flnm, 0)) < 0)
fprintf(stderr,
"%s: can't open %s/%s: %s\n",
ProgName,devdskf,flnm,SysErr());
if (swtab[i].st_dev && swdev[i] < 0)
keeplooking = 1;
}
}
/*
* Lastly, see if there were any swap devices we could not locate.
*/
if (keeplooking) {
for (i = 0; i < MSFILES; i++)
if (swtab[i].st_dev && swdev[i] < 0)
fprintf(stderr,
"%s: can't open swap device %d,%d\n", ProgName,
major(swtab[i].st_dev), minor(swtab[i].st_dev));
}
closedir(devdsk);
}
/*
* GetUser(aproc)
*
* Read in the user struct for `aproc' and return a pointer to it.
* If an error occurs, return NULL.
*/
static struct user *
GetUser(aproc)
struct proc *aproc;
{
static char *WarnMsg = "Warning: can't read ";
static union {
struct user user;
char upgs[USIZE][NBPP];
} u;
register int i, pgtype, file, swapi;
register u_int addr;
register char *flnm;
/*
* aproc->p_upgs has the pdes for the u-area. Also, encoded into
* the pde is the key to the location of these pages. If the disk
* block descriptor is of type DBD_NONE, then the pages are in
* core. If they are of type DBD_SWAP they are out on swap device
* number `dbd_swpi' at logical block number `dbd_pgno'. This is
* actually pretty cool, except that each swap partition must be
* treated separately (so we had to open all of them).
*
* If at any time, an lseek() or read() fails, print a warning
* message (if `Wflag' is set) and return NULL.
*/
for (i = 0; i < USIZE; i++) {
pgtype = pdetodbd(&aproc->p_upgs[i])->dbd_type;
switch (pgtype) {
case DBD_NONE: /* in core */
addr = aproc->p_upgs[i].pgm.pg_pfn*NBPP;
file = mem;
flnm = memf;
break;
case DBD_SWAP: /* swapped out */
/*
* I assume that it's necessary to add in `st_swplo'
* in case our logical swap partition starts at a
* block offset other than zero. The include files
* werent clear on this, so I guessed. ..jef
*/
swapi = aproc->p_upgs[i].pgm.dbd.dbd_swpi;
addr = BBTOB(aproc->p_upgs[i].pgm.dbd.dbd_pgno +
swtab[swapi].st_swplo);
file = swdev[swapi];
flnm = "swap";
break;
default: /* other (impossible?) things */
if (Wflag)
printf("%suser page of type %d for pid %d\n",
WarnMsg, pgtype, aproc->p_pid);
return((struct user *)NULL);
}
if (SKRD(file, addr, u.upgs[i], NBPP)) {
if (Wflag)
printf("%suser page %u for pid %d from %s\n",
WarnMsg, addr/NBPP, aproc->p_pid, flnm);
return((struct user *)NULL);
}
}
return (&u.user);
}
syntax highlighted by Code2HTML, v. 0.9.1