/*
** 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.
**
** NetBSD/KERN_PROC2 support by Simon Burge (simonb@NetBSD.ORG)
*/
#ifndef lint
static char rcsid[] = "$Id: nbsd-44.c,v 1.10 2005/04/06 23:49:35 forys Exp $";
#endif
#define NO_MEXTERN
#include "conf.h"
#undef NO_MEXTERN
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/resource.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[NSIG]; /* dynamically filled in by MdepInit() */
int NSig = NSIG - 1;
#define SETCMD(dst,src,maxlen) { \
if (maxlen > 0) src[maxlen] = '\0'; \
dst = (dst = strrchr(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 */
int CmdLen; /* commands are unique to this many bytes */
pid_T MyPid; /* pid of this process */
uid_T MyUid; /* uid of this process */
char *ProgName; /* program name */
static const char *nomemmsg = "%s: %s: out of memory (wanted %u bytes)\n";
/*
* 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 *SysErr();
const char * const *signam, *scp;
size_t siz;
char *cp;
int i;
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 = (strstr(ProgName, "snice") == NULL);
/*
* 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;
CmdLen = MAXCOMLEN;
/*
* Determine total space for signal names (or numbers) and NULs,
* allocate memory, then copy signals with pointers in SigMap[].
*/
for (i = siz = 0, signam = sys_signame; i < NSIG; i++, signam++)
siz += (signam != NULL && strchr(*signam, ' ') == NULL)?
strlen(*signam): 10; /* names or numbers */
siz += NSIG; /* NUL terminators */
if ((cp = malloc(siz)) == NULL) {
fprintf(stderr, nomemmsg, ProgName, "MdepInit", siz);
exit(EX_SERR);
}
for (i = 0, signam = sys_signame; i < NSIG; i++, signam++) {
SigMap[i] = cp;
if (signam != NULL && strchr(*signam, ' ') == NULL) {
for (scp = *signam; *scp != '\0'; scp++)
*cp++ = islower(*scp)? toupper(*scp): *scp;
*cp++ = '\0';
} else
cp += sprintf(cp, "%u", i) + 1;
}
}
/*
* 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));
}
/* OS supports POSIX-style regular expressions */
#include <regex.h>
REAL_REGEX_FUNCS
/*
* Now, set up everything we need to write a GetProc() routine.
*/
#include <sys/user.h>
#include <sys/sysctl.h>
static char *pidmap[] = {
"swapper", "init"
#ifdef NeXTBSD
, "mach_init"
#else
, "pagedaemon"
#ifdef __FreeBSD__
#if (__FreeBSD__ > 3)
, "vmdaemon", "bufdaemon", "syncer", "vnlru"
#else
, "vmdaemon", "update"
#endif
#endif
#ifdef __NetBSD_Version__
#if (__NetBSD_Version__ >= 105000000)
, "reaper", "ioflush"
#endif
#endif
#endif /* !NeXTBSD */
};
static int pidmapsiz = sizeof(pidmap) / sizeof(pidmap[0]);
#ifdef __FreeBSD__
#if (__FreeBSD__ > 4)
#define _PROC_COMM(p) (p)->ki_comm
#define _PROC_FLAG(p) (p)->ki_flag
#define _PROC_PID(p) (p)->ki_pid
#define _PROC_STAT(p) (p)->ki_stat
#define _PROC_TDEV(p) (p)->ki_tdev
#define _PROC_UID(p) (p)->ki_uid
#endif
#endif /* __FreeBSD__ */
#if defined(__NetBSD_Version__) && defined(KERN_PROC2)
#define _SYSCTL_ARG KERN_PROC2
#define _SYSCTL_NMIB 6
#define _SYSCTL_PROC kinfo_proc2
#define _SYSCTL_MIBINIT(m) \
m[0] = CTL_KERN; \
m[1] = KERN_PROC2; \
m[2] = KERN_PROC_ALL; \
m[3] = 0; \
m[4] = sizeof(struct _SYSCTL_PROC); \
m[5] = 0
#define _SYSCTL_MIBPROC(m,sz) \
m[5] = (sz) / sizeof(struct _SYSCTL_PROC)
#define _PROC_COMM(p) (p)->p_comm
#define _PROC_FLAG(p) (p)->p_flag
#define _PROC_PID(p) (p)->p_pid
#define _PROC_STAT(p) (p)->p_stat
#define _PROC_TDEV(p) (p)->p_tdev
#define _PROC_UID(p) (p)->p_uid
#endif /* __NetBSD_Version__ && KERN_PROC2 */
#ifndef _PROC_TDEV /* PROC defaults */
#define _PROC_COMM(p) (p)->kp_proc.p_comm
#define _PROC_FLAG(p) (p)->kp_proc.p_flag
#define _PROC_PID(p) (p)->kp_proc.p_pid
#define _PROC_STAT(p) (p)->kp_proc.p_stat
#define _PROC_TDEV(p) (p)->kp_eproc.e_tdev
#define _PROC_UID(p) (p)->kp_eproc.e_ucred.cr_uid
#endif
#ifndef _SYSCTL_MIBINIT /* SYSCTL defaults */
#define _SYSCTL_ARG KERN_PROC
#define _SYSCTL_NMIB 3
#define _SYSCTL_PROC kinfo_proc
#define _SYSCTL_MIBINIT(m) \
m[0] = CTL_KERN; \
m[1] = KERN_PROC; \
m[2] = KERN_PROC_ALL
#define _SYSCTL_MIBPROC(m,sz)
#endif
/*
* GetProc()
*
* Fill in and return a `struct ProcInfo' with information about the
* next process. If no processes are left, return NULL.
*/
struct ProcInfo *
GetProc()
{
static struct ProcInfo procinfo;
static int nproc = -1;
static struct _SYSCTL_PROC *aproc;
/*
* If this is our first time here, prepare to read procs from kernel.
*/
if (nproc == -1) {
int mib[_SYSCTL_NMIB];
size_t size = 0;
_SYSCTL_MIBINIT(mib);
if (sysctl(mib, _SYSCTL_NMIB, NULL, &size, NULL, 0) < 0) {
fprintf(stderr, "%s: sysctl proctab size: %s\n",
ProgName, strerror(errno));
exit(EX_SERR);
}
size += (size / 8);
if ((aproc = malloc(size)) == NULL) {
fprintf(stderr, nomemmsg, ProgName, "GetProc", size);
exit(EX_SERR);
}
_SYSCTL_MIBPROC(mib,size);
if (sysctl(mib, _SYSCTL_NMIB, aproc, &size, NULL, 0) < 0) {
fprintf(stderr, "%s: sysctl proctab: %s\n",
ProgName, strerror(errno));
exit(EX_SERR);
}
if (size % sizeof *aproc != 0) {
fprintf(stderr,
"%s: proc size mismatch, recompile libkvm\n",
ProgName);
exit(EX_SERR);
}
nproc = size / sizeof(struct _SYSCTL_PROC);
}
if (nproc == 0)
return((struct ProcInfo *)NULL);
do {
if (_PROC_STAT(aproc) != 0) {
/*
* Make sure this isn't a "zombie" or "exiting"
* process. If it is, fill in procinfo and return.
*/
procinfo.pi_flags = 0;
procinfo.pi_pid = (pid_T) _PROC_PID(aproc);
procinfo.pi_uid = (uid_T) _PROC_UID(aproc);
if (_PROC_STAT(aproc) == SZOMB) { /* zombie */
static char *zombie = "<defunct>";
procinfo.pi_flags |= PI_ZOMBIE;
procinfo.pi_cmd = zombie;
} else if (_PROC_FLAG(aproc) & P_WEXIT) { /* exiting */
static char *exiting = "<exiting>";
procinfo.pi_flags |= PI_SWEXIT;
procinfo.pi_cmd = exiting;
}
if (procinfo.pi_flags) {
nproc--;
aproc++;
return(&procinfo);
}
}
} while (_PROC_STAT(aproc) == 0);
/*
* We now have a process (`aproc').
* Fill in the rest of `procinfo'.
*/
if (_PROC_TDEV(aproc) != NODEV) { /* controlling tty */
procinfo.pi_flags |= PI_CTLTTY;
procinfo.pi_tty = (tty_T) _PROC_TDEV(aproc);
}
#ifdef __FreeBSD__
# if (__FreeBSD__ > 4)
if (_PROC_PID(aproc) < 100) /* special */
procinfo.pi_flags |= PI_ASKUSR;
# else
if (_PROC_PID(aproc) < pidmapsiz) { /* special */
procinfo.pi_cmd = pidmap[_PROC_PID(aproc)];
procinfo.pi_flags |= PI_ASKUSR;
} else /* set path-stripped command name */
# endif
#else
if (_PROC_PID(aproc) < pidmapsiz) { /* special */
procinfo.pi_cmd = pidmap[_PROC_PID(aproc)];
procinfo.pi_flags |= PI_ASKUSR;
} else /* set path-stripped command name */
#endif
SETCMD(procinfo.pi_cmd, _PROC_COMM(aproc), MAXCOMLEN)
nproc--;
aproc++;
return(&procinfo);
}
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