[unix-history] / usr / src / usr.bin / nfsstat / nfsstat.c

/*
 * Copyright (c) 1983, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983, 1989 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)nfsstat.c	5.5 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/vmmac.h>
#include <sys/file.h>
#include <machine/pte.h>
#include <sys/namei.h>
#include <sys/mount.h>
#include <nfs/nfsv2.h>
#include <nfs/nfs.h>
#include <ctype.h>
#include <errno.h>
#include <nlist.h>
#include <stdio.h>
#include <paths.h>

#define	YES	1
#define	NO	0

struct nlist nl[] = {
#define	N_NFSSTAT	0
	{ "_nfsstats" },
#define	N_SYSMAP	1
	{ "_Sysmap" },
#define	N_SYSSIZE	2
	{ "_Syssize" },
	"",
};

struct	pte *Sysmap;

char	*system = _PATH_UNIX;
char	*kmemf = _PATH_KMEM;
int	kmem;
int	kflag;
int	interval;

extern	char *malloc();
extern	off_t lseek();

main(argc, argv)
	int argc;
	char *argv[];
{
	int ch;

	interval = 0;
	argc--;
	argv++;
	if (argc > 0) {
		interval = atoi(argv[0]);
		if (interval <= 0)
			usage();
		argv++, argc--;
		if (argc > 0) {
			system = *argv;
			argv++, argc--;
			if (argc > 0) {
				kmemf = *argv;
				kflag++;
			}
		}
	}
	if (nlist(system, nl) < 0 || nl[0].n_type == 0) {
		fprintf(stderr, "%s: no namelist\n", system);
		exit(1);
	}
	kmem = open(kmemf, O_RDONLY);
	if (kmem < 0) {
		perror(kmemf);
		exit(1);
	}
	if (kflag) {
		off_t off;

		Sysmap = (struct pte *)
		   malloc((u_int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
		if (!Sysmap) {
			fputs("nfsstat: can't get memory for Sysmap.\n", stderr);
			exit(1);
		}
		off = nl[N_SYSMAP].n_value & ~KERNBASE;
		(void)lseek(kmem, off, L_SET);
		(void)read(kmem, (char *)Sysmap,
			(int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
	}
	intpr(interval, nl[N_NFSSTAT].n_value);
	exit(0);
}

/*
 * Seek into the kernel for a value.
 */
off_t
klseek(fd, base, off)
	int fd, off;
	off_t base;
{
	if (kflag) {
		/* get kernel pte */
		base &= ~KERNBASE;
		base = ctob(Sysmap[btop(base)].pg_pfnum) + (base & PGOFSET);
	}
	return (lseek(fd, base, off));
}

usage()
{
	fputs("Usage: nfsstat [interval [ system [ corefile ] ] ]\n", stderr);
	exit(1);
}

/*
 * Print a description of the network interfaces.
 */
intpr(interval, nfsstataddr)
	int interval;
	off_t nfsstataddr;
{
	struct nfsstats nfsstats;

	if (nfsstataddr == 0) {
		printf("nfsstat: symbol not defined\n");
		return;
	}
	if (interval) {
		sidewaysintpr((unsigned)interval, nfsstataddr);
		return;
	}
	klseek(kmem, nfsstataddr, 0);
	read(kmem, (char *)&nfsstats, sizeof(struct nfsstats));
	printf("Client Info:\n");
	printf("Rpc Counts:\n");
	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
		"Getattr", "Setattr", "Lookup", "Readlink", "Read",
		"Write", "Create", "Remove");
	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
		nfsstats.rpccnt[1],
		nfsstats.rpccnt[2],
		nfsstats.rpccnt[4],
		nfsstats.rpccnt[5],
		nfsstats.rpccnt[6],
		nfsstats.rpccnt[8],
		nfsstats.rpccnt[9],
		nfsstats.rpccnt[10]);
	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
		"Rename", "Link", "Symlink", "Mkdir", "Rmdir",
		"Readdir", "Statfs");
	printf("%9d %9d %9d %9d %9d %9d %9d\n",
		nfsstats.rpccnt[11],
		nfsstats.rpccnt[12],
		nfsstats.rpccnt[13],
		nfsstats.rpccnt[14],
		nfsstats.rpccnt[15],
		nfsstats.rpccnt[16],
		nfsstats.rpccnt[17]);
	printf("Rpc Info:\n");
	printf("%9.9s %9.9s %9.9s %9.9s %9.9s\n",
		"TimedOut", "Invalid", "X Replies", "Retries", "Requests");
	printf("%9d %9d %9d %9d %9d\n",
		nfsstats.rpctimeouts,
		nfsstats.rpcinvalid,
		nfsstats.rpcunexpected,
		nfsstats.rpcretries,
		nfsstats.rpcrequests);
	printf("Cache Info:\n");
	printf("%9.9s %9.9s %9.9s %9.9s",
		"Attr Hits", "Misses", "Lkup Hits", "Misses");
	printf(" %9.9s %9.9s %9.9s %9.9s\n",
		"BioR Hits", "Misses", "BioW Hits", "Misses");
	printf("%9d %9d %9d %9d",
		nfsstats.attrcache_hits, nfsstats.attrcache_misses,
		nfsstats.lookupcache_hits, nfsstats.lookupcache_misses);
	printf(" %9d %9d %9d %9d\n",
		nfsstats.biocache_reads-nfsstats.read_bios,
		nfsstats.read_bios,
		nfsstats.biocache_writes-nfsstats.write_bios,
		nfsstats.write_bios);
	printf("%9.9s %9.9s %9.9s %9.9s",
		"BioRLHits", "Misses", "BioD Hits", "Misses");
	printf(" %9.9s %9.9s\n", "DirE Hits", "Misses");
	printf("%9d %9d %9d %9d",
		nfsstats.biocache_readlinks-nfsstats.readlink_bios,
		nfsstats.readlink_bios,
		nfsstats.biocache_readdirs-nfsstats.readdir_bios,
		nfsstats.readdir_bios);
	printf(" %9d %9d\n",
		nfsstats.direofcache_hits, nfsstats.direofcache_misses);
	printf("\nServer Info:\n");
	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
		"Getattr", "Setattr", "Lookup", "Readlink", "Read",
		"Write", "Create", "Remove");
	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
		nfsstats.srvrpccnt[1],
		nfsstats.srvrpccnt[2],
		nfsstats.srvrpccnt[4],
		nfsstats.srvrpccnt[5],
		nfsstats.srvrpccnt[6],
		nfsstats.srvrpccnt[8],
		nfsstats.srvrpccnt[9],
		nfsstats.srvrpccnt[10]);
	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
		"Rename", "Link", "Symlink", "Mkdir", "Rmdir",
		"Readdir", "Statfs");
	printf("%9d %9d %9d %9d %9d %9d %9d\n",
		nfsstats.srvrpccnt[11],
		nfsstats.srvrpccnt[12],
		nfsstats.srvrpccnt[13],
		nfsstats.srvrpccnt[14],
		nfsstats.srvrpccnt[15],
		nfsstats.srvrpccnt[16],
		nfsstats.srvrpccnt[17]);
	printf("Server Ret-Failed\n");
	printf("%17d\n", nfsstats.srvrpc_errs);
	printf("Server Faults\n");
	printf("%13d\n", nfsstats.srv_errs);
	printf("Server Cache Stats:\n");
	printf("%9.9s %9.9s %9.9s %9.9s\n",
		"Inprog", "Idem", "Non-idem", "Misses");
	printf("%9d %9d %9d %9d\n",
		nfsstats.srvcache_inproghits,
		nfsstats.srvcache_idemdonehits,
		nfsstats.srvcache_nonidemdonehits,
		nfsstats.srvcache_misses);
}

u_char	signalled;			/* set if alarm goes off "early" */

/*
 * Print a running summary of nfs statistics.
 * Repeat display every interval seconds, showing statistics
 * collected over that interval.  Assumes that interval is non-zero.
 * First line printed at top of screen is always cumulative.
 */
sidewaysintpr(interval, off)
	unsigned interval;
	off_t off;
{
	struct nfsstats nfsstats, lastst;
	register int line;
	int oldmask;
	int catchalarm();

	klseek(kmem, off, 0);

	(void)signal(SIGALRM, catchalarm);
	signalled = NO;
	(void)alarm(interval);
	bzero((caddr_t)&lastst, sizeof(lastst));
banner:
	printf("        %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s\n",
		"Getattr", "Lookup", "Readlink", "Read",
		"Write", "Rename", "Link", "Readdir");
	fflush(stdout);
	line = 0;
loop:
	klseek(kmem, off, 0);
	read(kmem, (char *)&nfsstats, sizeof nfsstats);
	printf("Client: %8d %8d %8d %8d %8d %8d %8d %8d\n",
		nfsstats.rpccnt[1]-lastst.rpccnt[1],
		nfsstats.rpccnt[4]-lastst.rpccnt[4],
		nfsstats.rpccnt[5]-lastst.rpccnt[5],
		nfsstats.rpccnt[6]-lastst.rpccnt[6],
		nfsstats.rpccnt[8]-lastst.rpccnt[8],
		nfsstats.rpccnt[11]-lastst.rpccnt[11],
		nfsstats.rpccnt[12]-lastst.rpccnt[12],
		nfsstats.rpccnt[16]-lastst.rpccnt[16]);
	printf("Server: %8d %8d %8d %8d %8d %8d %8d %8d\n",
		nfsstats.srvrpccnt[1]-lastst.srvrpccnt[1],
		nfsstats.srvrpccnt[4]-lastst.srvrpccnt[4],
		nfsstats.srvrpccnt[5]-lastst.srvrpccnt[5],
		nfsstats.srvrpccnt[6]-lastst.srvrpccnt[6],
		nfsstats.srvrpccnt[8]-lastst.srvrpccnt[8],
		nfsstats.srvrpccnt[11]-lastst.srvrpccnt[11],
		nfsstats.srvrpccnt[12]-lastst.srvrpccnt[12],
		nfsstats.srvrpccnt[16]-lastst.srvrpccnt[16]);
	lastst = nfsstats;
	fflush(stdout);
	line++;
	oldmask = sigblock(sigmask(SIGALRM));
	if (! signalled) {
		sigpause(0);
	}
	sigsetmask(oldmask);
	signalled = NO;
	(void)alarm(interval);
	if (line == 21)
		goto banner;
	goto loop;
	/*NOTREACHED*/
}

/*
 * Called if an interval expires before sidewaysintpr has completed a loop.
 * Sets a flag to not wait for the alarm.
 */
catchalarm()
{
	signalled = YES;
}
Commit	Line	Data
4cbecdde KM	1	/*
	2	* Copyright (c) 1983, 1989 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Rick Macklem at The University of Guelph.
	7	*
87198c0c	8	* %sccs.include.redist.c%
4cbecdde KM	9	*/
	10
	11	#ifndef lint
	12	char copyright[] =
	13	"@(#) Copyright (c) 1983, 1989 Regents of the University of California.\n\
	14	All rights reserved.\n";
	15	#endif /* not lint */
	16
	17	#ifndef lint
87198c0c	18	static char sccsid[] = "@(#)nfsstat.c 5.5 (Berkeley) %G%";
4cbecdde KM	19	#endif /* not lint */
	20
	21	#include <sys/param.h>
	22	#include <sys/vmmac.h>
	23	#include <sys/file.h>
	24	#include <machine/pte.h>
	25	#include <sys/namei.h>
	26	#include <sys/mount.h>
	27	#include <nfs/nfsv2.h>
	28	#include <nfs/nfs.h>
	29	#include <ctype.h>
	30	#include <errno.h>
	31	#include <nlist.h>
	32	#include <stdio.h>
	33	#include <paths.h>
	34
	35	#define YES 1
	36	#define NO 0
	37
	38	struct nlist nl[] = {
	39	#define N_NFSSTAT 0
	40	{ "_nfsstats" },
	41	#define N_SYSMAP 1
	42	{ "_Sysmap" },
	43	#define N_SYSSIZE 2
	44	{ "_Syssize" },
	45	"",
	46	};
	47
	48	struct pte *Sysmap;
	49
	50	char *system = _PATH_UNIX;
	51	char *kmemf = _PATH_KMEM;
	52	int kmem;
	53	int kflag;
	54	int interval;
	55
	56	extern char *malloc();
	57	extern off_t lseek();
	58
	59	main(argc, argv)
	60	int argc;
	61	char *argv[];
	62	{
	63	int ch;
	64
	65	interval = 0;
	66	argc--;
	67	argv++;
	68	if (argc > 0) {
	69	interval = atoi(argv[0]);
	70	if (interval <= 0)
	71	usage();
	72	argv++, argc--;
	73	if (argc > 0) {
	74	system = *argv;
	75	argv++, argc--;
	76	if (argc > 0) {
	77	kmemf = *argv;
	78	kflag++;
	79	}
	80	}
	81	}
	82	if (nlist(system, nl) < 0 \|\| nl[0].n_type == 0) {
83	fprintf(stderr, "%s: no namelist\n", system);
84	exit(1);
85	}
86	kmem = open(kmemf, O_RDONLY);
87	if (kmem < 0) {
88	perror(kmemf);
89	exit(1);
90	}
91	if (kflag) {
92	off_t off;
93
94	Sysmap = (struct pte *)
95	malloc((u_int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
96	if (!Sysmap) {
97	fputs("nfsstat: can't get memory for Sysmap.\n", stderr);
98	exit(1);
99	}
100	off = nl[N_SYSMAP].n_value & ~KERNBASE;
101	(void)lseek(kmem, off, L_SET);
102	(void)read(kmem, (char *)Sysmap,
103	(int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
104	}
105	intpr(interval, nl[N_NFSSTAT].n_value);
106	exit(0);
107	}
108
109	/*
110	* Seek into the kernel for a value.
111	*/
112	off_t
113	klseek(fd, base, off)
114	int fd, off;
115	off_t base;
116	{
117	if (kflag) {
118	/* get kernel pte */
119	base &= ~KERNBASE;
120	base = ctob(Sysmap[btop(base)].pg_pfnum) + (base & PGOFSET);
121	}
122	return (lseek(fd, base, off));
123	}
124
125	usage()
126	{
127	fputs("Usage: nfsstat [interval [ system [ corefile ] ] ]\n", stderr);
128	exit(1);
129	}
130
131	/*
132	* Print a description of the network interfaces.
133	*/
134	intpr(interval, nfsstataddr)
135	int interval;
136	off_t nfsstataddr;
137	{
138	struct nfsstats nfsstats;
139
140	if (nfsstataddr == 0) {
141	printf("nfsstat: symbol not defined\n");
142	return;
143	}
144	if (interval) {
145	sidewaysintpr((unsigned)interval, nfsstataddr);
146	return;
147	}
148	klseek(kmem, nfsstataddr, 0);
149	read(kmem, (char *)&nfsstats, sizeof(struct nfsstats));
150	printf("Client Info:\n");
ab8b6a82	151	printf("Rpc Counts:\n");
4cbecdde KM	152	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
	153	"Getattr", "Setattr", "Lookup", "Readlink", "Read",
	154	"Write", "Create", "Remove");
	155	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
	156	nfsstats.rpccnt[1],
	157	nfsstats.rpccnt[2],
	158	nfsstats.rpccnt[4],
	159	nfsstats.rpccnt[5],
	160	nfsstats.rpccnt[6],
	161	nfsstats.rpccnt[8],
	162	nfsstats.rpccnt[9],
	163	nfsstats.rpccnt[10]);
	164	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
	165	"Rename", "Link", "Symlink", "Mkdir", "Rmdir",
	166	"Readdir", "Statfs");
	167	printf("%9d %9d %9d %9d %9d %9d %9d\n",
	168	nfsstats.rpccnt[11],
	169	nfsstats.rpccnt[12],
	170	nfsstats.rpccnt[13],
	171	nfsstats.rpccnt[14],
	172	nfsstats.rpccnt[15],
	173	nfsstats.rpccnt[16],
	174	nfsstats.rpccnt[17]);
ab8b6a82 KM	175	printf("Rpc Info:\n");
	176	printf("%9.9s %9.9s %9.9s %9.9s %9.9s\n",
	177	"TimedOut", "Invalid", "X Replies", "Retries", "Requests");
	178	printf("%9d %9d %9d %9d %9d\n",
	179	nfsstats.rpctimeouts,
	180	nfsstats.rpcinvalid,
	181	nfsstats.rpcunexpected,
	182	nfsstats.rpcretries,
	183	nfsstats.rpcrequests);
4cbecdde	184	printf("Cache Info:\n");
1b3a818d	185	printf("%9.9s %9.9s %9.9s %9.9s",
4cbecdde	186	"Attr Hits", "Misses", "Lkup Hits", "Misses");
1b3a818d KM	187	printf(" %9.9s %9.9s %9.9s %9.9s\n",
	188	"BioR Hits", "Misses", "BioW Hits", "Misses");
	189	printf("%9d %9d %9d %9d",
4cbecdde KM	190	nfsstats.attrcache_hits, nfsstats.attrcache_misses,
4cbecdde KM	191	nfsstats.lookupcache_hits, nfsstats.lookupcache_misses);
1b3a818d KM	192	printf(" %9d %9d %9d %9d\n",
	193	nfsstats.biocache_reads-nfsstats.read_bios,
	194	nfsstats.read_bios,
	195	nfsstats.biocache_writes-nfsstats.write_bios,
	196	nfsstats.write_bios);
ab8b6a82 KM	197	printf("%9.9s %9.9s %9.9s %9.9s",
	198	"BioRLHits", "Misses", "BioD Hits", "Misses");
	199	printf(" %9.9s %9.9s\n", "DirE Hits", "Misses");
	200	printf("%9d %9d %9d %9d",
	201	nfsstats.biocache_readlinks-nfsstats.readlink_bios,
	202	nfsstats.readlink_bios,
	203	nfsstats.biocache_readdirs-nfsstats.readdir_bios,
	204	nfsstats.readdir_bios);
	205	printf(" %9d %9d\n",
e6c65482	206	nfsstats.direofcache_hits, nfsstats.direofcache_misses);
ab8b6a82	207	printf("\nServer Info:\n");
4cbecdde KM	208	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
	209	"Getattr", "Setattr", "Lookup", "Readlink", "Read",
	210	"Write", "Create", "Remove");
	211	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
	212	nfsstats.srvrpccnt[1],
	213	nfsstats.srvrpccnt[2],
	214	nfsstats.srvrpccnt[4],
	215	nfsstats.srvrpccnt[5],
	216	nfsstats.srvrpccnt[6],
	217	nfsstats.srvrpccnt[8],
	218	nfsstats.srvrpccnt[9],
	219	nfsstats.srvrpccnt[10]);
	220	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
	221	"Rename", "Link", "Symlink", "Mkdir", "Rmdir",
	222	"Readdir", "Statfs");
	223	printf("%9d %9d %9d %9d %9d %9d %9d\n",
	224	nfsstats.srvrpccnt[11],
	225	nfsstats.srvrpccnt[12],
	226	nfsstats.srvrpccnt[13],
	227	nfsstats.srvrpccnt[14],
	228	nfsstats.srvrpccnt[15],
	229	nfsstats.srvrpccnt[16],
	230	nfsstats.srvrpccnt[17]);
1b3a818d	231	printf("Server Ret-Failed\n");
4cbecdde KM	232	printf("%17d\n", nfsstats.srvrpc_errs);
	233	printf("Server Faults\n");
	234	printf("%13d\n", nfsstats.srv_errs);
1b3a818d KM	235	printf("Server Cache Stats:\n");
	236	printf("%9.9s %9.9s %9.9s %9.9s\n",
	237	"Inprog", "Idem", "Non-idem", "Misses");
	238	printf("%9d %9d %9d %9d\n",
	239	nfsstats.srvcache_inproghits,
	240	nfsstats.srvcache_idemdonehits,
	241	nfsstats.srvcache_nonidemdonehits,
	242	nfsstats.srvcache_misses);
4cbecdde KM	243	}
	244
	245	u_char signalled; /* set if alarm goes off "early" */
	246
	247	/*
	248	* Print a running summary of nfs statistics.
	249	* Repeat display every interval seconds, showing statistics
	250	* collected over that interval. Assumes that interval is non-zero.
	251	* First line printed at top of screen is always cumulative.
	252	*/
	253	sidewaysintpr(interval, off)
	254	unsigned interval;
	255	off_t off;
	256	{
	257	struct nfsstats nfsstats, lastst;
	258	register int line;
	259	int oldmask;
	260	int catchalarm();
	261
	262	klseek(kmem, off, 0);
	263
	264	(void)signal(SIGALRM, catchalarm);
	265	signalled = NO;
	266	(void)alarm(interval);
	267	bzero((caddr_t)&lastst, sizeof(lastst));
	268	banner:
	269	printf(" %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s\n",
	270	"Getattr", "Lookup", "Readlink", "Read",
	271	"Write", "Rename", "Link", "Readdir");
	272	fflush(stdout);
	273	line = 0;
	274	loop:
	275	klseek(kmem, off, 0);
	276	read(kmem, (char *)&nfsstats, sizeof nfsstats);
	277	printf("Client: %8d %8d %8d %8d %8d %8d %8d %8d\n",
	278	nfsstats.rpccnt[1]-lastst.rpccnt[1],
	279	nfsstats.rpccnt[4]-lastst.rpccnt[4],
	280	nfsstats.rpccnt[5]-lastst.rpccnt[5],
	281	nfsstats.rpccnt[6]-lastst.rpccnt[6],
	282	nfsstats.rpccnt[8]-lastst.rpccnt[8],
	283	nfsstats.rpccnt[11]-lastst.rpccnt[11],
	284	nfsstats.rpccnt[12]-lastst.rpccnt[12],
	285	nfsstats.rpccnt[16]-lastst.rpccnt[16]);
	286	printf("Server: %8d %8d %8d %8d %8d %8d %8d %8d\n",
	287	nfsstats.srvrpccnt[1]-lastst.srvrpccnt[1],
	288	nfsstats.srvrpccnt[4]-lastst.srvrpccnt[4],
	289	nfsstats.srvrpccnt[5]-lastst.srvrpccnt[5],
	290	nfsstats.srvrpccnt[6]-lastst.srvrpccnt[6],
	291	nfsstats.srvrpccnt[8]-lastst.srvrpccnt[8],
	292	nfsstats.srvrpccnt[11]-lastst.srvrpccnt[11],
	293	nfsstats.srvrpccnt[12]-lastst.srvrpccnt[12],
	294	nfsstats.srvrpccnt[16]-lastst.srvrpccnt[16]);
	295	lastst = nfsstats;
	296	fflush(stdout);
	297	line++;
	298	oldmask = sigblock(sigmask(SIGALRM));
	299	if (! signalled) {
	300	sigpause(0);
	301	}
	302	sigsetmask(oldmask);
	303	signalled = NO;
	304	(void)alarm(interval);
	305	if (line == 21)
	306	goto banner;
307	goto loop;
308	/NOTREACHED/
309	}
310
311	/*
312	* Called if an interval expires before sidewaysintpr has completed a loop.
313	* Sets a flag to not wait for the alarm.
314	*/
315	catchalarm()
316	{
317	signalled = YES;
318	}