pstat.c

早期freebsd实现

/*-
 * Copyright (c) 1980, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 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 acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1991, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)pstat.c	8.9 (Berkeley) 2/16/94";
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/vnode.h>
#include <sys/map.h>
#include <sys/ucred.h>
#define KERNEL
#include <sys/file.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#define NFS
#include <sys/mount.h>
#undef NFS
#undef KERNEL
#include <sys/stat.h>
#include <nfs/nfsnode.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/conf.h>

#include <sys/sysctl.h>

#include <err.h>
#include <kvm.h>
#include <limits.h>
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

struct nlist nl[] = {
#define VM_SWAPMAP	0
	{ "_swapmap" },	/* list of free swap areas */
#define VM_NSWAPMAP	1
	{ "_nswapmap" },/* size of the swap map */
#define VM_SWDEVT	2
	{ "_swdevt" },	/* list of swap devices and sizes */
#define VM_NSWAP	3
	{ "_nswap" },	/* size of largest swap device */
#define VM_NSWDEV	4
	{ "_nswdev" },	/* number of swap devices */
#define VM_DMMAX	5
	{ "_dmmax" },	/* maximum size of a swap block */
#define	V_MOUNTLIST	6
	{ "_mountlist" },	/* address of head of mount list. */
#define V_NUMV		7
	{ "_numvnodes" },
#define	FNL_NFILE	8
	{"_nfiles"},
#define FNL_MAXFILE	9
	{"_maxfiles"},
#define NLMANDATORY FNL_MAXFILE	/* names up to here are mandatory */
#define VM_NISWAP	NLMANDATORY + 1
	{ "_niswap" },
#define VM_NISWDEV	NLMANDATORY + 2
	{ "_niswdev" },
#define	SCONS		NLMANDATORY + 3
	{ "_cons" },
#define	SPTY		NLMANDATORY + 4
	{ "_pt_tty" },
#define	SNPTY		NLMANDATORY + 5
	{ "_npty" },

#ifdef hp300
#define	SDCA	(SNPTY+1)
	{ "_dca_tty" },
#define	SNDCA	(SNPTY+2)
	{ "_ndca" },
#define	SDCM	(SNPTY+3)
	{ "_dcm_tty" },
#define	SNDCM	(SNPTY+4)
	{ "_ndcm" },
#define	SDCL	(SNPTY+5)
	{ "_dcl_tty" },
#define	SNDCL	(SNPTY+6)
	{ "_ndcl" },
#define	SITE	(SNPTY+7)
	{ "_ite_tty" },
#define	SNITE	(SNPTY+8)
	{ "_nite" },
#endif

#ifdef mips
#define SDC	(SNPTY+1)
	{ "_dc_tty" },
#define SNDC	(SNPTY+2)
	{ "_dc_cnt" },
#endif

	{ "" }
};

int	usenumflag;
int	totalflag;
char	*nlistf	= NULL;
char	*memf	= NULL;
kvm_t	*kd;

#define	SVAR(var) __STRING(var)	/* to force expansion */
#define	KGET(idx, var)							\
	KGET1(idx, &var, sizeof(var), SVAR(var))
#define	KGET1(idx, p, s, msg)						\
	KGET2(nl[idx].n_value, p, s, msg)
#define	KGET2(addr, p, s, msg)						\
	if (kvm_read(kd, (u_long)(addr), p, s) != s)			\
		warnx("cannot read %s: %s", msg, kvm_geterr(kd))
#define	KGETRET(addr, p, s, msg)					\
	if (kvm_read(kd, (u_long)(addr), p, s) != s) {			\
		warnx("cannot read %s: %s", msg, kvm_geterr(kd));	\
		return (0);						\
	}

void	filemode __P((void));
int	getfiles __P((char **, int *));
struct mount *
	getmnt __P((struct mount *));
struct e_vnode *
	kinfo_vnodes __P((int *));
struct e_vnode *
	loadvnodes __P((int *));
void	mount_print __P((struct mount *));
void	nfs_header __P((void));
int	nfs_print __P((struct vnode *));
void	swapmode __P((void));
void	ttymode __P((void));
void	ttyprt __P((struct tty *, int));
void	ttytype __P((struct tty *, char *, int, int));
void	ufs_header __P((void));
int	ufs_print __P((struct vnode *));
void	usage __P((void));
void	vnode_header __P((void));
void	vnode_print __P((struct vnode *, struct vnode *));
void	vnodemode __P((void));

int
main(argc, argv)
	int argc;
	char *argv[];
{
	extern char *optarg;
	extern int optind;
	int ch, i, quit, ret;
	int fileflag, swapflag, ttyflag, vnodeflag;
	char buf[_POSIX2_LINE_MAX];

	fileflag = swapflag = ttyflag = vnodeflag = 0;
	while ((ch = getopt(argc, argv, "TM:N:finstv")) != EOF)
		switch (ch) {
		case 'f':
			fileflag = 1;
			break;
		case 'M':
			memf = optarg;
			break;
		case 'N':
			nlistf = optarg;
			break;
		case 'n':
			usenumflag = 1;
			break;
		case 's':
			swapflag = 1;
			break;
		case 'T':
			totalflag = 1;
			break;
		case 't':
			ttyflag = 1;
			break;
		case 'v':
		case 'i':		/* Backward compatibility. */
			vnodeflag = 1;
			break;
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	/*
	 * Discard setgid privileges if not the running kernel so that bad
	 * guys can't print interesting stuff from kernel memory.
	 */
	if (nlistf != NULL || memf != NULL)
		(void)setgid(getgid());

	if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf)) == 0)
		errx(1, "kvm_openfiles: %s", buf);
	if ((ret = kvm_nlist(kd, nl)) != 0) {
		if (ret == -1)
			errx(1, "kvm_nlist: %s", kvm_geterr(kd));
		for (i = quit = 0; i <= NLMANDATORY; i++)
			if (!nl[i].n_value) {
				quit = 1;
				warnx("undefined symbol: %s\n", nl[i].n_name);
			}
		if (quit)
			exit(1);
	}
	if (!(fileflag | vnodeflag | ttyflag | swapflag | totalflag))
		usage();
	if (fileflag || totalflag)
		filemode();
	if (vnodeflag || totalflag)
		vnodemode();
	if (ttyflag)
		ttymode();
	if (swapflag || totalflag)
		swapmode();
	exit (0);
}

struct e_vnode {
	struct vnode *avnode;
	struct vnode vnode;
};

void
vnodemode()
{
	register struct e_vnode *e_vnodebase, *endvnode, *evp;
	register struct vnode *vp;
	register struct mount *maddr, *mp;
	int numvnodes;

	e_vnodebase = loadvnodes(&numvnodes);
	if (totalflag) {
		(void)printf("%7d vnodes\n", numvnodes);
		return;
	}
	endvnode = e_vnodebase + numvnodes;
	(void)printf("%d active vnodes\n", numvnodes);


#define ST	mp->mnt_stat
	maddr = NULL;
	for (evp = e_vnodebase; evp < endvnode; evp++) {
		vp = &evp->vnode;
		if (vp->v_mount != maddr) {
			/*
			 * New filesystem
			 */
			if ((mp = getmnt(vp->v_mount)) == NULL)
				continue;
			maddr = vp->v_mount;
			mount_print(mp);
			vnode_header();
			switch(ST.f_type) {
			case MOUNT_UFS:
			case MOUNT_MFS:
				ufs_header();
				break;
			case MOUNT_NFS:
				nfs_header();
				break;
			case MOUNT_NONE:
			case MOUNT_MSDOS:
			default:
				break;
			}
			(void)printf("\n");
		}
		vnode_print(evp->avnode, vp);
		switch(ST.f_type) {
		case MOUNT_UFS:
		case MOUNT_MFS:
			ufs_print(vp);
			break;
		case MOUNT_NFS:
			nfs_print(vp);
			break;
		case MOUNT_NONE:
		case MOUNT_MSDOS:
		default:
			break;
		}
		(void)printf("\n");
	}
	free(e_vnodebase);
}

void
vnode_header()
{
	(void)printf("ADDR     TYP VFLAG  USE HOLD");
}

void
vnode_print(avnode, vp)
	struct vnode *avnode;
	struct vnode *vp;
{
	char *type, flags[16]; 
	char *fp = flags;
	register int flag;

	/*
	 * set type
	 */
	switch(vp->v_type) {
	case VNON:
		type = "non"; break;
	case VREG:
		type = "reg"; break;
	case VDIR:
		type = "dir"; break;
	case VBLK:
		type = "blk"; break;
	case VCHR:
		type = "chr"; break;
	case VLNK:
		type = "lnk"; break;
	case VSOCK:
		type = "soc"; break;
	case VFIFO:
		type = "fif"; break;
	case VBAD:
		type = "bad"; break;
	default: 
		type = "unk"; break;
	}
	/*
	 * gather flags
	 */
	flag = vp->v_flag;
	if (flag & VROOT)
		*fp++ = 'R';
	if (flag & VTEXT)
		*fp++ = 'T';
	if (flag & VSYSTEM)
		*fp++ = 'S';
	if (flag & VXLOCK)
		*fp++ = 'L';
	if (flag & VXWANT)
		*fp++ = 'W';
	if (flag & VBWAIT)
		*fp++ = 'B';
	if (flag & VALIASED)
		*fp++ = 'A';
	if (flag == 0)
		*fp++ = '-';
	*fp = '\0';
	(void)printf("%8x %s %5s %4d %4d",
	    avnode, type, flags, vp->v_usecount, vp->v_holdcnt);
}

void
ufs_header() 
{
	(void)printf(" FILEID IFLAG RDEV|SZ");
}

int
ufs_print(vp) 
	struct vnode *vp;
{
	register int flag;
	struct inode inode, *ip = &inode;
	char flagbuf[16], *flags = flagbuf;
	char *name;
	mode_t type;

	KGETRET(VTOI(vp), &inode, sizeof(struct inode), "vnode's inode");
	flag = ip->i_flag;
	if (flag & IN_LOCKED)
		*flags++ = 'L';
	if (flag & IN_WANTED)
		*flags++ = 'W';
	if (flag & IN_RENAME)
		*flags++ = 'R';
	if (flag & IN_UPDATE)
		*flags++ = 'U';
	if (flag & IN_ACCESS)
		*flags++ = 'A';
	if (flag & IN_CHANGE)
		*flags++ = 'C';
	if (flag & IN_MODIFIED)
		*flags++ = 'M';
	if (flag & IN_SHLOCK)
		*flags++ = 'S';
	if (flag & IN_EXLOCK)
		*flags++ = 'E';
	if (flag & IN_LWAIT)
		*flags++ = 'Z';
	if (flag == 0)
		*flags++ = '-';
	*flags = '\0';

	(void)printf(" %6d %5s", ip->i_number, flagbuf);
	type = ip->i_mode & S_IFMT;
	if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode))
		if (usenumflag || ((name = devname(ip->i_rdev, type)) == NULL))
			(void)printf("   %2d,%-2d", 
			    major(ip->i_rdev), minor(ip->i_rdev));
		else
			(void)printf(" %7s", name);
	else
		(void)printf(" %7qd", ip->i_size);
	return (0);
}

void
nfs_header() 
{
	(void)printf(" FILEID NFLAG RDEV|SZ");
}

int
nfs_print(vp) 
	struct vnode *vp;
{
	struct nfsnode nfsnode, *np = &nfsnode;
	char flagbuf[16], *flags = flagbuf;
	register int flag;
	char *name;
	mode_t type;

	KGETRET(VTONFS(vp), &nfsnode, sizeof(nfsnode), "vnode's nfsnode");
	flag = np->n_flag;
	if (flag & NFLUSHWANT)
		*flags++ = 'W';
	if (flag & NFLUSHINPROG)
		*flags++ = 'P';
	if (flag & NMODIFIED)
		*flags++ = 'M';
	if (flag & NWRITEERR)
		*flags++ = 'E';
	if (flag & NQNFSNONCACHE)
		*flags++ = 'X';
	if (flag & NQNFSWRITE)
		*flags++ = 'O';
	if (flag & NQNFSEVICTED)
		*flags++ = 'G';
	if (flag == 0)
		*flags++ = '-';
	*flags = '\0';

#define VT	np->n_vattr
	(void)printf(" %6d %5s", VT.va_fileid, flagbuf);
	type = VT.va_mode & S_IFMT;
	if (S_ISCHR(VT.va_mode) || S_ISBLK(VT.va_mode))
		if (usenumflag || ((name = devname(VT.va_rdev, type)) == NULL))
			(void)printf("   %2d,%-2d", 
			    major(VT.va_rdev), minor(VT.va_rdev));
		else
			(void)printf(" %7s", name);
	else
		(void)printf(" %7qd", np->n_size);
	return (0);
}
	
/*
 * Given a pointer to a mount structure in kernel space,
 * read it in and return a usable pointer to it.
 */
struct mount *
getmnt(maddr)
	struct mount *maddr;
{
	static struct mtab {
		struct mtab *next;
		struct mount *maddr;
		struct mount mount;
	} *mhead = NULL;
	register struct mtab *mt;

	for (mt = mhead; mt != NULL; mt = mt->next)
		if (maddr == mt->maddr)
			return (&mt->mount);
	if ((mt = malloc(sizeof(struct mtab))) == NULL)
		err(1, NULL);
	KGETRET(maddr, &mt->mount, sizeof(struct mount), "mount table");
	mt->maddr = maddr;
	mt->next = mhead;
	mhead = mt;
	return (&mt->mount);
}

void
mount_print(mp)
	struct mount *mp;
{
	register int flags;
	char *type;

#define ST	mp->mnt_stat
	(void)printf("*** MOUNT ");
	switch (ST.f_type) {
	case MOUNT_NONE:
		type = "none";
		break;
	case MOUNT_UFS:
		type = "ufs";
		break;
	case MOUNT_NFS:
		type = "nfs";
		break;
	case MOUNT_MFS:
		type = "mfs";
		break;
	case MOUNT_MSDOS:
		type = "pc";
		break;
	default:
		type = "unknown";
		break;
	}
	(void)printf("%s %s on %s", type, ST.f_mntfromname, ST.f_mntonname);
	if (flags = mp->mnt_flag) {
		char *comma = "(";

		putchar(' ');
		/* user visable flags */