pstat.c

早期freebsd实现

		if (flags & MNT_RDONLY) {
			(void)printf("%srdonly", comma);
			flags &= ~MNT_RDONLY;
			comma = ",";
		}
		if (flags & MNT_SYNCHRONOUS) {
			(void)printf("%ssynchronous", comma);
			flags &= ~MNT_SYNCHRONOUS;
			comma = ",";
		}
		if (flags & MNT_NOEXEC) {
			(void)printf("%snoexec", comma);
			flags &= ~MNT_NOEXEC;
			comma = ",";
		}
		if (flags & MNT_NOSUID) {
			(void)printf("%snosuid", comma);
			flags &= ~MNT_NOSUID;
			comma = ",";
		}
		if (flags & MNT_NODEV) {
			(void)printf("%snodev", comma);
			flags &= ~MNT_NODEV;
			comma = ",";
		}
		if (flags & MNT_EXPORTED) {
			(void)printf("%sexport", comma);
			flags &= ~MNT_EXPORTED;
			comma = ",";
		}
		if (flags & MNT_EXRDONLY) {
			(void)printf("%sexrdonly", comma);
			flags &= ~MNT_EXRDONLY;
			comma = ",";
		}
		if (flags & MNT_LOCAL) {
			(void)printf("%slocal", comma);
			flags &= ~MNT_LOCAL;
			comma = ",";
		}
		if (flags & MNT_QUOTA) {
			(void)printf("%squota", comma);
			flags &= ~MNT_QUOTA;
			comma = ",";
		}
		/* filesystem control flags */
		if (flags & MNT_UPDATE) {
			(void)printf("%supdate", comma);
			flags &= ~MNT_UPDATE;
			comma = ",";
		}
		if (flags & MNT_MLOCK) {
			(void)printf("%slock", comma);
			flags &= ~MNT_MLOCK;
			comma = ",";
		}
		if (flags & MNT_MWAIT) {
			(void)printf("%swait", comma);
			flags &= ~MNT_MWAIT;
			comma = ",";
		}
		if (flags & MNT_MPBUSY) {
			(void)printf("%sbusy", comma);
			flags &= ~MNT_MPBUSY;
			comma = ",";
		}
		if (flags & MNT_MPWANT) {
			(void)printf("%swant", comma);
			flags &= ~MNT_MPWANT;
			comma = ",";
		}
		if (flags & MNT_UNMOUNT) {
			(void)printf("%sunmount", comma);
			flags &= ~MNT_UNMOUNT;
			comma = ",";
		}
		if (flags)
			(void)printf("%sunknown_flags:%x", comma, flags);
		(void)printf(")");
	}
	(void)printf("\n");
#undef ST
}

struct e_vnode *
loadvnodes(avnodes)
	int *avnodes;
{
	int mib[2];
	size_t copysize;
	struct e_vnode *vnodebase;

	if (memf != NULL) {
		/*
		 * do it by hand
		 */
		return (kinfo_vnodes(avnodes));
	}
	mib[0] = CTL_KERN;
	mib[1] = KERN_VNODE;
	if (sysctl(mib, 2, NULL, &copysize, NULL, 0) == -1)
		err(1, "sysctl: KERN_VNODE");
	if ((vnodebase = malloc(copysize)) == NULL)
		err(1, NULL);
	if (sysctl(mib, 2, vnodebase, &copysize, NULL, 0) == -1)
		err(1, "sysctl: KERN_VNODE");
	if (copysize % sizeof(struct e_vnode))
		errx(1, "vnode size mismatch");
	*avnodes = copysize / sizeof(struct e_vnode);

	return (vnodebase);
}

/*
 * simulate what a running kernel does in in kinfo_vnode
 */
struct e_vnode *
kinfo_vnodes(avnodes)
	int *avnodes;
{
	struct mntlist mountlist;
	struct mount *mp, mount;
	struct vnode *vp, vnode;
	char *vbuf, *evbuf, *bp;
	int num, numvnodes;

#define VPTRSZ  sizeof(struct vnode *)
#define VNODESZ sizeof(struct vnode)

	KGET(V_NUMV, numvnodes);
	if ((vbuf = malloc((numvnodes + 20) * (VPTRSZ + VNODESZ))) == NULL)
		err(1, NULL);
	bp = vbuf;
	evbuf = vbuf + (numvnodes + 20) * (VPTRSZ + VNODESZ);
	KGET(V_MOUNTLIST, mountlist);
	for (num = 0, mp = mountlist.tqh_first;
	    mp != NULL; mp = mp->mnt_list.tqe_next) {
		KGET2(mp, &mount, sizeof(mount), "mount entry");
		for (vp = mount.mnt_vnodelist.lh_first;
		    vp != NULL; vp = vp->v_mntvnodes.le_next) {
			KGET2(vp, &vnode, sizeof(vnode), "vnode");
			if ((bp + VPTRSZ + VNODESZ) > evbuf)
				/* XXX - should realloc */
				errx(1, "no more room for vnodes");
			memmove(bp, &vp, VPTRSZ);
			bp += VPTRSZ;
			memmove(bp, &vnode, VNODESZ);
			bp += VNODESZ;
			num++;
		}
	}
	*avnodes = num;
	return ((struct e_vnode *)vbuf);
}
	
char hdr[]="  LINE RAW CAN OUT  HWT LWT     COL STATE  SESS  PGID DISC\n";
int ttyspace = 128;

void
ttymode()
{
	struct tty *tty;

	if ((tty = malloc(ttyspace * sizeof(*tty))) == NULL)
		err(1, NULL);
#ifndef hp300
	(void)printf("1 console\n");
	KGET(SCONS, *tty);
	(void)printf(hdr);
	ttyprt(&tty[0], 0);
#endif
#ifdef vax
	if (nl[SNQD].n_type != 0) 
		qdss();
	if (nl[SNDZ].n_type != 0)
		ttytype(tty, "dz", SDZ, SNDZ);
	if (nl[SNDH].n_type != 0)
		ttytype(tty, "dh", SDH, SNDH);
	if (nl[SNDMF].n_type != 0)
		ttytype(tty, "dmf", SDMF, SNDMF);
	if (nl[SNDHU].n_type != 0)
		ttytype(tty, "dhu", SDHU, SNDHU);
	if (nl[SNDMZ].n_type != 0)
		ttytype(tty, "dmz", SDMZ, SNDMZ);
#endif
#ifdef tahoe
	if (nl[SNVX].n_type != 0)
		ttytype(tty, "vx", SVX, SNVX);
	if (nl[SNMP].n_type != 0)
		ttytype(tty, "mp", SMP, SNMP);
#endif
#ifdef hp300
	if (nl[SNITE].n_type != 0)
		ttytype(tty, "ite", SITE, SNITE);
	if (nl[SNDCA].n_type != 0)
		ttytype(tty, "dca", SDCA, SNDCA);
	if (nl[SNDCM].n_type != 0)
		ttytype(tty, "dcm", SDCM, SNDCM);
	if (nl[SNDCL].n_type != 0)
		ttytype(tty, "dcl", SDCL, SNDCL);
#endif
#ifdef mips
	if (nl[SNDC].n_type != 0)
		ttytype(tty, "dc", SDC, SNDC);
#endif
	if (nl[SNPTY].n_type != 0)
		ttytype(tty, "pty", SPTY, SNPTY);
}

void
ttytype(tty, name, type, number)
	register struct tty *tty;
	char *name;
	int type, number;
{
	register struct tty *tp;
	int ntty;

	if (tty == NULL)
		return;
	KGET(number, ntty);
	(void)printf("%d %s %s\n", ntty, name, (ntty == 1) ? "line" : "lines");
	if (ntty > ttyspace) {
		ttyspace = ntty;
		if ((tty = realloc(tty, ttyspace * sizeof(*tty))) == 0)
			err(1, NULL);
	}
	KGET1(type, tty, ntty * sizeof(struct tty), "tty structs");
	(void)printf(hdr);
	for (tp = tty; tp < &tty[ntty]; tp++)
		ttyprt(tp, tp - tty);
}

struct {
	int flag;
	char val;
} ttystates[] = {
	{ TS_WOPEN,	'W'},
	{ TS_ISOPEN,	'O'},
	{ TS_CARR_ON,	'C'},
	{ TS_TIMEOUT,	'T'},
	{ TS_FLUSH,	'F'},
	{ TS_BUSY,	'B'},
	{ TS_ASLEEP,	'A'},
	{ TS_XCLUDE,	'X'},
	{ TS_TTSTOP,	'S'},
	{ TS_TBLOCK,	'K'},
	{ TS_ASYNC,	'Y'},
	{ TS_BKSL,	'D'},
	{ TS_ERASE,	'E'},
	{ TS_LNCH,	'L'},
	{ TS_TYPEN,	'P'},
	{ TS_CNTTB,	'N'},
	{ 0,	       '\0'},
};

void
ttyprt(tp, line)
	register struct tty *tp;
	int line;
{
	register int i, j;
	pid_t pgid;
	char *name, state[20];

	if (usenumflag || tp->t_dev == 0 ||
	   (name = devname(tp->t_dev, S_IFCHR)) == NULL)
		(void)printf("%7d ", line); 
	else
		(void)printf("%7s ", name);
	(void)printf("%2d %3d ", tp->t_rawq.c_cc, tp->t_canq.c_cc);
	(void)printf("%3d %4d %3d %3d ", tp->t_outq.c_cc, 
		tp->t_hiwat, tp->t_lowat, tp->t_column);
	for (i = j = 0; ttystates[i].flag; i++)
		if (tp->t_state&ttystates[i].flag)
			state[j++] = ttystates[i].val;
	if (j == 0)
		state[j++] = '-';
	state[j] = '\0';
	(void)printf("%-4s %6x", state, (u_long)tp->t_session & ~KERNBASE);
	pgid = 0;
	if (tp->t_pgrp != NULL)
		KGET2(&tp->t_pgrp->pg_id, &pgid, sizeof(pid_t), "pgid");
	(void)printf("%6d ", pgid);
	switch (tp->t_line) {
	case TTYDISC:
		(void)printf("term\n");
		break;
	case TABLDISC:
		(void)printf("tab\n");
		break;
	case SLIPDISC:
		(void)printf("slip\n");
		break;
	default:
		(void)printf("%d\n", tp->t_line);
		break;
	}
}

void
filemode()
{
	register struct file *fp;
	struct file *addr;
	char *buf, flagbuf[16], *fbp;
	int len, maxfile, nfile;
	static char *dtypes[] = { "???", "inode", "socket" };

	KGET(FNL_MAXFILE, maxfile);
	if (totalflag) {
		KGET(FNL_NFILE, nfile);
		(void)printf("%3d/%3d files\n", nfile, maxfile);
		return;
	}
	if (getfiles(&buf, &len) == -1)
		return;
	/*
	 * Getfiles returns in malloc'd memory a pointer to the first file
	 * structure, and then an array of file structs (whose addresses are
	 * derivable from the previous entry).
	 */
	addr = *((struct file **)buf);
	fp = (struct file *)(buf + sizeof(struct file *));
	nfile = (len - sizeof(struct file *)) / sizeof(struct file);
	
	(void)printf("%d/%d open files\n", nfile, maxfile);
	(void)printf("   LOC   TYPE    FLG     CNT  MSG    DATA    OFFSET\n");
	for (; (char *)fp < buf + len; addr = fp->f_filef, fp++) {
		if ((unsigned)fp->f_type > DTYPE_SOCKET)
			continue;
		(void)printf("%x ", addr);
		(void)printf("%-8.8s", dtypes[fp->f_type]);
		fbp = flagbuf;
		if (fp->f_flag & FREAD)
			*fbp++ = 'R';
		if (fp->f_flag & FWRITE)
			*fbp++ = 'W';
		if (fp->f_flag & FAPPEND)
			*fbp++ = 'A';
#ifdef FSHLOCK	/* currently gone */
		if (fp->f_flag & FSHLOCK)
			*fbp++ = 'S';
		if (fp->f_flag & FEXLOCK)
			*fbp++ = 'X';
#endif
		if (fp->f_flag & FASYNC)
			*fbp++ = 'I';
		*fbp = '\0';
		(void)printf("%6s  %3d", flagbuf, fp->f_count);
		(void)printf("  %3d", fp->f_msgcount);
		(void)printf("  %8.1x", fp->f_data);
		if (fp->f_offset < 0)
			(void)printf("  %qx\n", fp->f_offset);
		else
			(void)printf("  %qd\n", fp->f_offset);
	}
	free(buf);
}

int
getfiles(abuf, alen)
	char **abuf;
	int *alen;
{
	size_t len;
	int mib[2];
	char *buf;

	/*
	 * XXX
	 * Add emulation of KINFO_FILE here.
	 */
	if (memf != NULL)
		errx(1, "files on dead kernel, not implemented\n");

	mib[0] = CTL_KERN;
	mib[1] = KERN_FILE;
	if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1) {
		warn("sysctl: KERN_FILE");
		return (-1);
	}
	if ((buf = malloc(len)) == NULL)
		err(1, NULL);
	if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) {
		warn("sysctl: KERN_FILE");
		return (-1);
	}
	*abuf = buf;
	*alen = len;
	return (0);
}

/*
 * swapmode is based on a program called swapinfo written
 * by Kevin Lahey <[e-mail]>.
 */
void
swapmode()
{
	char *header;
	int hlen, nswap, nswdev, dmmax, nswapmap, niswap, niswdev;
	int s, e, div, i, l, avail, nfree, npfree, used;
	struct swdevt *sw;
	long blocksize, *perdev;
	struct map *swapmap, *kswapmap;
	struct mapent *mp;

	KGET(VM_NSWAP, nswap);
	KGET(VM_NSWDEV, nswdev);
	KGET(VM_DMMAX, dmmax);
	KGET(VM_NSWAPMAP, nswapmap);
	KGET(VM_SWAPMAP, kswapmap);	/* kernel `swapmap' is a pointer */
	if ((sw = malloc(nswdev * sizeof(*sw))) == NULL ||
	    (perdev = malloc(nswdev * sizeof(*perdev))) == NULL ||
	    (mp = malloc(nswapmap * sizeof(*mp))) == NULL)
		err(1, "malloc");
	KGET1(VM_SWDEVT, sw, nswdev * sizeof(*sw), "swdevt");
	KGET2((long)kswapmap, mp, nswapmap * sizeof(*mp), "swapmap");

	/* Supports sequential swap */
	if (nl[VM_NISWAP].n_value != 0) {
		KGET(VM_NISWAP, niswap);
		KGET(VM_NISWDEV, niswdev);
	} else {
		niswap = nswap;
		niswdev = nswdev;
	}

	/* First entry in map is `struct map'; rest are mapent's. */
	swapmap = (struct map *)mp;
	if (nswapmap != swapmap->m_limit - (struct mapent *)kswapmap)
		errx(1, "panic: nswapmap goof");

	/* Count up swap space. */
	nfree = 0;
	memset(perdev, 0, nswdev * sizeof(*perdev));
	for (mp++; mp->m_addr != 0; mp++) {
		s = mp->m_addr;			/* start of swap region */
		e = mp->m_addr + mp->m_size;	/* end of region */
		nfree += mp->m_size;

		/*
		 * Swap space is split up among the configured disks.
		 *
		 * For interleaved swap devices, the first dmmax blocks
		 * of swap space some from the first disk, the next dmmax
		 * blocks from the next, and so on up to niswap blocks.
		 *
		 * Sequential swap devices follow the interleaved devices
		 * (i.e. blocks starting at niswap) in the order in which
		 * they appear in the swdev table.  The size of each device
		 * will be a multiple of dmmax.
		 *
		 * The list of free space joins adjacent free blocks,
		 * ignoring device boundries.  If we want to keep track
		 * of this information per device, we'll just have to
		 * extract it ourselves.  We know that dmmax-sized chunks
		 * cannot span device boundaries (interleaved or sequential)
		 * so we loop over such chunks assigning them to devices.
		 */
		i = -1;
		while (s < e) {		/* XXX this is inefficient */
			int bound = roundup(s+1, dmmax);

			if (bound > e)
				bound = e;
			if (bound <= niswap) {
				/* Interleaved swap chunk. */
				if (i == -1)
					i = (s / dmmax) % niswdev;
				perdev[i] += bound - s;
				if (++i >= niswdev)
					i = 0;
			} else {
				/* Sequential swap chunk. */
				if (i < niswdev) {
					i = niswdev;
					l = niswap + sw[i].sw_nblks;
				}
				while (s >= l) {
					/* XXX don't die on bogus blocks */
					if (i == nswdev-1)
						break;
					l += sw[++i].sw_nblks;
				}
				perdev[i] += bound - s;
			}
			s = bound;
		}
	}

	header = getbsize(&hlen, &blocksize);
	if (!totalflag)
		(void)printf("%-11s %*s %8s %8s %8s  %s\n",
		    "Device", hlen, header,
		    "Used", "Avail", "Capacity", "Type");
	div = blocksize / 512;
	avail = npfree = 0;
	for (i = 0; i < nswdev; i++) {
		int xsize, xfree;

		if (!totalflag)
			(void)printf("/dev/%-6s %*d ",
			    devname(sw[i].sw_dev, S_IFBLK),
			    hlen, sw[i].sw_nblks / div);

		/*
		 * Don't report statistics for partitions which have not
		 * yet been activated via swapon(8).
		 */
		if (!(sw[i].sw_flags & SW_FREED)) {
			if (totalflag)
				continue;
			(void)printf(" *** not available for swapping ***\n");
			continue;
		}
		xsize = sw[i].sw_nblks;
		xfree = perdev[i];
		used = xsize - xfree;
		npfree++;
		avail += xsize;
		if (totalflag)
			continue;
		(void)printf("%8d %8d %5.0f%%    %s\n", 
		    used / div, xfree / div,
		    (double)used / (double)xsize * 100.0,
		    (sw[i].sw_flags & SW_SEQUENTIAL) ?
			     "Sequential" : "Interleaved");
	}

	/* 
	 * If only one partition has been set up via swapon(8), we don't
	 * need to bother with totals.
	 */
	used = avail - nfree;
	if (totalflag) {
		(void)printf("%dM/%dM swap space\n", used / 2048, avail / 2048);
		return;
	}
	if (npfree > 1) {
		(void)printf("%-11s %*d %8d %8d %5.0f%%\n",
		    "Total", hlen, avail / div, used / div, nfree / div,
		    (double)used / (double)avail * 100.0);
	}
}

void
usage()
{
	(void)fprintf(stderr,
	    "usage: pstat -Tfnstv [system] [-M core] [-N system]\n");
	exit(1);
}