Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/finger/util.c	Lines:	0	163	0.0 %
Date:	2017-11-13	Branches:	0	110	0.0 %


/*	$OpenBSD: util.c,v 1.32 2015/12/26 20:51:35 guenther Exp $	*/

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 * Portions Copyright (c) 1983, 1995, 1996 Eric P. Allman (woof!)
 *
 * This code is derived from software contributed to Berkeley by
 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
 *
 * 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. 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.
 */

#include <sys/types.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <paths.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <vis.h>
#include "finger.h"
#include "extern.h"

char	*estrdup(char *);
WHERE	*walloc(PERSON *pn);
void	find_idle_and_ttywrite(WHERE *);
void	userinfo(PERSON *, struct passwd *);

void
find_idle_and_ttywrite(WHERE *w)
{
	struct stat sb;

	(void)snprintf(tbuf, sizeof(tbuf), "%s%s", _PATH_DEV, w->tty);
	if (stat(tbuf, &sb) < 0) {
		/* Don't bitch about it, just handle it... */
		w->idletime = 0;
		w->writable = 0;

		return;
	}
	w->idletime = now < sb.st_atime ? 0 : now - sb.st_atime;

#define	TALKABLE	0220		/* tty is writable if 220 mode */
	w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
}

char *
estrdup(char *s)
{
	char *p = strdup(s);
	if (!p)
		err(1, "strdup");
	return (p);
}

void
userinfo(PERSON *pn, struct passwd *pw)
{
	char *p;
	char *bp, name[1024];
	struct stat sb;
	int len;

	pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
	pn->mailrecv = -1;		/* -1 == not_valid */

	pn->uid = pw->pw_uid;
	pn->name = estrdup(pw->pw_name);
	pn->dir = estrdup(pw->pw_dir);
	pn->shell = estrdup(pw->pw_shell);

	(void)strlcpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));

	/* ampersands get replaced by the login name */
	if (!(p = strsep(&bp, ",")))
		return;
	expandusername(p, pw->pw_name, name, sizeof(name));
	if (stravis(&pn->realname, p, VIS_SAFE|VIS_NOSLASH) == -1)
		err(1, "stravis");
	if ((p = strsep(&bp, ",")) && *p) {
		if (stravis(&pn->office, p, VIS_SAFE|VIS_NOSLASH) == -1)
			err(1, "stravis");
	}
	if ((p = strsep(&bp, ",")) && *p) {
		if (stravis(&pn->officephone, p, VIS_SAFE|VIS_NOSLASH) == -1)
			err(1, "stravis");
	}
	if ((p = strsep(&bp, ",")) && *p) {
		if (stravis(&pn->homephone, p, VIS_SAFE|VIS_NOSLASH) == -1)
			err(1, "stravis");
	}
	len = snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILSPOOL,
	    pw->pw_name);
	if (len != -1 && len < sizeof(tbuf)) {
		if (stat(tbuf, &sb) < 0) {
			if (errno != ENOENT) {
				warn("%s", tbuf);
				return;
			}
		} else if (sb.st_size != 0) {
			pn->mailrecv = sb.st_mtime;
			pn->mailread = sb.st_atime;
		}
	}
}

int
match(struct passwd *pw, char *user)
{
	char *p, *t;
	char name[1024];

	(void)strlcpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));

	/* ampersands get replaced by the login name */
	if (!(p = strtok(p, ",")))
		return (0);
	expandusername(p, pw->pw_name, name, sizeof(name));
	for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
		if (!strcasecmp(p, user))
			return (1);
	return (0);
}

/* inspired by usr.sbin/sendmail/util.c::buildfname */
void
expandusername(char *gecos, char *login, char *buf, int buflen)
{
	char *p, *bp;

	/* why do we skip asterisks!?!? */
	if (*gecos == '*')
		gecos++;
	bp = buf;

	/* copy gecos, interpolating & to be full name */
	for (p = gecos; *p != '\0'; p++) {
		if (bp >= &buf[buflen - 1]) {
			/* buffer overflow - just use login name */
			strlcpy(buf, login, buflen);
			buf[buflen - 1] = '\0';
			return;
		}
		if (*p == '&') {
			/* interpolate full name */
			strlcpy(bp, login, buflen - (bp - buf));
			*bp = toupper((unsigned char)*bp);
			bp += strlen(bp);
		}
		else
			*bp++ = *p;
	}
	*bp = '\0';
}

void
enter_lastlog(PERSON *pn)
{
	WHERE *w;
	static int opened, fd;
	struct lastlog ll;
	char doit = 0;

	/* some systems may not maintain lastlog, don't report errors. */
	if (!opened) {
		fd = open(_PATH_LASTLOG, O_RDONLY);
		opened = 1;
	}
	if (fd == -1 ||
	    pread(fd, &ll, sizeof(ll), (off_t)pn->uid * sizeof(ll)) !=
	    sizeof(ll)) {
		/* as if never logged in */
		ll.ll_line[0] = ll.ll_host[0] = '\0';
		ll.ll_time = 0;
	}
	if ((w = pn->whead) == NULL)
		doit = 1;
	else if (ll.ll_time != 0) {
		/* if last login is earlier than some current login */
		for (; !doit && w != NULL; w = w->next)
			if (w->info == LOGGEDIN && w->loginat < ll.ll_time)
				doit = 1;
		/*
		 * and if it's not any of the current logins
		 * can't use time comparison because there may be a small
		 * discrepency since login calls time() twice
		 */
		for (w = pn->whead; doit && w != NULL; w = w->next)
			if (w->info == LOGGEDIN &&
			    strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0)
				doit = 0;
	}
	if (doit) {
		w = walloc(pn);
		w->info = LASTLOG;
		bcopy(ll.ll_line, w->tty, UT_LINESIZE);
		w->tty[UT_LINESIZE] = 0;
		bcopy(ll.ll_host, w->host, UT_HOSTSIZE);
		w->host[UT_HOSTSIZE] = 0;
		w->loginat = ll.ll_time;
	}
}

void
enter_where(struct utmp *ut, PERSON *pn)
{
	WHERE *w = walloc(pn);

	w->info = LOGGEDIN;
	bcopy(ut->ut_line, w->tty, UT_LINESIZE);
	w->tty[UT_LINESIZE] = 0;
	bcopy(ut->ut_host, w->host, UT_HOSTSIZE);
	w->host[UT_HOSTSIZE] = 0;
	w->loginat = (time_t)ut->ut_time;
	find_idle_and_ttywrite(w);
}

PERSON *
enter_person(struct passwd *pw)
{
	PERSON *pn, **pp;

	for (pp = htab + hash(pw->pw_name);
	    *pp != NULL && strcmp((*pp)->name, pw->pw_name) != 0;
	    pp = &(*pp)->hlink)
		;
	if ((pn = *pp) == NULL) {
		pn = palloc();
		entries++;
		if (phead == NULL)
			phead = ptail = pn;
		else {
			ptail->next = pn;
			ptail = pn;
		}
		pn->next = NULL;
		pn->hlink = NULL;
		*pp = pn;
		userinfo(pn, pw);
		pn->whead = NULL;
	}
	return (pn);
}

PERSON *
find_person(char *name)
{
	PERSON *pn;

	/* name may be only UT_NAMESIZE long and not terminated */
	for (pn = htab[hash(name)];
	    pn != NULL && strncmp(pn->name, name, UT_NAMESIZE) != 0;
	    pn = pn->hlink)
		;
	return (pn);
}

int
hash(char *name)
{
	int h, i;

	h = 0;
	/* name may be only UT_NAMESIZE long and not terminated */
	for (i = UT_NAMESIZE; --i >= 0 && *name;)
		h = ((h << 2 | h >> (HBITS - 2)) ^ *name++) & HMASK;
	return (h);
}

PERSON *
palloc(void)
{
	PERSON *p;

	if ((p = malloc((u_int) sizeof(PERSON))) == NULL)
		err(1, "malloc");
	return (p);
}

WHERE *
walloc(PERSON *pn)
{
	WHERE *w;

	if ((w = malloc((u_int) sizeof(WHERE))) == NULL)
		err(1, "malloc");
	if (pn->whead == NULL)
		pn->whead = pn->wtail = w;
	else {
		pn->wtail->next = w;
		pn->wtail = w;
	}
	w->next = NULL;
	return (w);
}

char *
prphone(char *num)
{
	char *p;
	int len;
	static char pbuf[15];

	/* don't touch anything if the user has their own formatting */
	for (p = num; *p; ++p)
		if (!isdigit((unsigned char)*p))
			return (num);
	len = p - num;
	p = pbuf;
	switch (len) {
	case 11:			/* +0-123-456-7890 */
		*p++ = '+';
		*p++ = *num++;
		*p++ = '-';
		/* FALLTHROUGH */
	case 10:			/* 012-345-6789 */
		*p++ = *num++;
		*p++ = *num++;
		*p++ = *num++;
		*p++ = '-';
		/* FALLTHROUGH */
	case 7:				/* 012-3456 */
		*p++ = *num++;
		*p++ = *num++;
		*p++ = *num++;
		break;
	case 5:				/* x0-1234 */
	case 4:				/* x1234 */
		*p++ = 'x';
		*p++ = *num++;
		break;
	default:
		return (num);
	}
	if (len != 4) {
		*p++ = '-';
		*p++ = *num++;
	}
	*p++ = *num++;
	*p++ = *num++;
	*p++ = *num++;
	*p = '\0';
	return (pbuf);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: util.c,v 1.32 2015/12/26 20:51:35 guenther Exp $ */
2
3			/*
4			* Copyright (c) 1989 The Regents of the University of California.
5			* All rights reserved.
6			* Portions Copyright (c) 1983, 1995, 1996 Eric P. Allman (woof!)
7			*
8			* This code is derived from software contributed to Berkeley by
9			* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36			#include <sys/types.h>
37			#include <sys/uio.h>
38			#include <sys/stat.h>
39			#include <err.h>
40			#include <stdio.h>
41			#include <stdlib.h>
42			#include <ctype.h>
43			#include <string.h>
44			#include <paths.h>
45			#include <errno.h>
46			#include <fcntl.h>
47			#include <unistd.h>
48			#include <vis.h>
49			#include "finger.h"
50			#include "extern.h"
51
52			char estrdup(char );
53			WHERE walloc(PERSON pn);
54			void find_idle_and_ttywrite(WHERE *);
55			void userinfo(PERSON , struct passwd );
56
57			void
58			find_idle_and_ttywrite(WHERE *w)
59			{
60			struct stat sb;
61
62			(void)snprintf(tbuf, sizeof(tbuf), "%s%s", _PATH_DEV, w->tty);
63			if (stat(tbuf, &sb) < 0) {
64			/* Don't bitch about it, just handle it... */
65			w->idletime = 0;
66			w->writable = 0;
67
68			return;
69			}
70			w->idletime = now < sb.st_atime ? 0 : now - sb.st_atime;
71
72			#define TALKABLE 0220 /* tty is writable if 220 mode */
73			w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
74			}
75
76			char *
77			estrdup(char *s)
78			{
79			char *p = strdup(s);
80			if (!p)
81			err(1, "strdup");
82			return (p);
83			}
84
85			void
86			userinfo(PERSON pn, struct passwd pw)
87			{
88			char *p;
89			char *bp, name[1024];
90			struct stat sb;
91			int len;
92
93			pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
94			pn->mailrecv = -1; /* -1 == not_valid */
95
96			pn->uid = pw->pw_uid;
97			pn->name = estrdup(pw->pw_name);
98			pn->dir = estrdup(pw->pw_dir);
99			pn->shell = estrdup(pw->pw_shell);
100
101			(void)strlcpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
102
103			/* ampersands get replaced by the login name */
104			if (!(p = strsep(&bp, ",")))
105			return;
106			expandusername(p, pw->pw_name, name, sizeof(name));
107			if (stravis(&pn->realname, p, VIS_SAFE\|VIS_NOSLASH) == -1)
108			err(1, "stravis");
109			if ((p = strsep(&bp, ",")) && *p) {
110			if (stravis(&pn->office, p, VIS_SAFE\|VIS_NOSLASH) == -1)
111			err(1, "stravis");
112			}
113			if ((p = strsep(&bp, ",")) && *p) {
114			if (stravis(&pn->officephone, p, VIS_SAFE\|VIS_NOSLASH) == -1)
115			err(1, "stravis");
116			}
117			if ((p = strsep(&bp, ",")) && *p) {
118			if (stravis(&pn->homephone, p, VIS_SAFE\|VIS_NOSLASH) == -1)
119			err(1, "stravis");
120			}
121			len = snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILSPOOL,
122			pw->pw_name);
123			if (len != -1 && len < sizeof(tbuf)) {
124			if (stat(tbuf, &sb) < 0) {
125			if (errno != ENOENT) {
126			warn("%s", tbuf);
127			return;
128			}
129			} else if (sb.st_size != 0) {
130			pn->mailrecv = sb.st_mtime;
131			pn->mailread = sb.st_atime;
132			}
133			}
134			}
135
136			int
137			match(struct passwd pw, char user)
138			{
139			char p, t;
140			char name[1024];
141
142			(void)strlcpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));
143
144			/* ampersands get replaced by the login name */
145			if (!(p = strtok(p, ",")))
146			return (0);
147			expandusername(p, pw->pw_name, name, sizeof(name));
148			for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
149			if (!strcasecmp(p, user))
150			return (1);
151			return (0);
152			}
153
154			/* inspired by usr.sbin/sendmail/util.c::buildfname */
155			void
156			expandusername(char gecos, char login, char *buf, int buflen)
157			{
158			char p, bp;
159
160			/* why do we skip asterisks!?!? */
161			if (gecos == '')
162			gecos++;
163			bp = buf;
164
165			/* copy gecos, interpolating & to be full name */
166			for (p = gecos; *p != '\0'; p++) {
167			if (bp >= &buf[buflen - 1]) {
168			/* buffer overflow - just use login name */
169			strlcpy(buf, login, buflen);
170			buf[buflen - 1] = '\0';
171			return;
172			}
173			if (*p == '&') {
174			/* interpolate full name */
175			strlcpy(bp, login, buflen - (bp - buf));
176			bp = toupper((unsigned char)bp);
177			bp += strlen(bp);
178			}
179			else
180			bp++ = p;
181			}
182			*bp = '\0';
183			}
184
185			void
186			enter_lastlog(PERSON *pn)
187			{
188			WHERE *w;
189			static int opened, fd;
190			struct lastlog ll;
191			char doit = 0;
192
193			/* some systems may not maintain lastlog, don't report errors. */
194			if (!opened) {
195			fd = open(_PATH_LASTLOG, O_RDONLY);
196			opened = 1;
197			}
198			if (fd == -1 \|\|
199			pread(fd, &ll, sizeof(ll), (off_t)pn->uid * sizeof(ll)) !=
200			sizeof(ll)) {
201			/* as if never logged in */
202			ll.ll_line[0] = ll.ll_host[0] = '\0';
203			ll.ll_time = 0;
204			}
205			if ((w = pn->whead) == NULL)
206			doit = 1;
207			else if (ll.ll_time != 0) {
208			/* if last login is earlier than some current login */
209			for (; !doit && w != NULL; w = w->next)
210			if (w->info == LOGGEDIN && w->loginat < ll.ll_time)
211			doit = 1;
212			/*
213			* and if it's not any of the current logins
214			* can't use time comparison because there may be a small
215			* discrepency since login calls time() twice
216			*/
217			for (w = pn->whead; doit && w != NULL; w = w->next)
218			if (w->info == LOGGEDIN &&
219			strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0)
220			doit = 0;
221			}
222			if (doit) {
223			w = walloc(pn);
224			w->info = LASTLOG;
225			bcopy(ll.ll_line, w->tty, UT_LINESIZE);
226			w->tty[UT_LINESIZE] = 0;
227			bcopy(ll.ll_host, w->host, UT_HOSTSIZE);
228			w->host[UT_HOSTSIZE] = 0;
229			w->loginat = ll.ll_time;
230			}
231			}
232
233			void
234			enter_where(struct utmp ut, PERSON pn)
235			{
236			WHERE *w = walloc(pn);
237
238			w->info = LOGGEDIN;
239			bcopy(ut->ut_line, w->tty, UT_LINESIZE);
240			w->tty[UT_LINESIZE] = 0;
241			bcopy(ut->ut_host, w->host, UT_HOSTSIZE);
242			w->host[UT_HOSTSIZE] = 0;
243			w->loginat = (time_t)ut->ut_time;
244			find_idle_and_ttywrite(w);
245			}
246
247			PERSON *
248			enter_person(struct passwd *pw)
249			{
250			PERSON pn, *pp;
251
252			for (pp = htab + hash(pw->pw_name);
253			pp != NULL && strcmp((pp)->name, pw->pw_name) != 0;
254			pp = &(*pp)->hlink)
255			;
256			if ((pn = *pp) == NULL) {
257			pn = palloc();
258			entries++;
259			if (phead == NULL)
260			phead = ptail = pn;
261			else {
262			ptail->next = pn;
263			ptail = pn;
264			}
265			pn->next = NULL;
266			pn->hlink = NULL;
267			*pp = pn;
268			userinfo(pn, pw);
269			pn->whead = NULL;
270			}
271			return (pn);
272			}
273
274			PERSON *
275			find_person(char *name)
276			{
277			PERSON *pn;
278
279			/* name may be only UT_NAMESIZE long and not terminated */
280			for (pn = htab[hash(name)];
281			pn != NULL && strncmp(pn->name, name, UT_NAMESIZE) != 0;
282			pn = pn->hlink)
283			;
284			return (pn);
285			}
286
287			int
288			hash(char *name)
289			{
290			int h, i;
291
292			h = 0;
293			/* name may be only UT_NAMESIZE long and not terminated */
294			for (i = UT_NAMESIZE; --i >= 0 && *name;)
295			h = ((h << 2 \| h >> (HBITS - 2)) ^ *name++) & HMASK;
296			return (h);
297			}
298
299			PERSON *
300			palloc(void)
301			{
302			PERSON *p;
303
304			if ((p = malloc((u_int) sizeof(PERSON))) == NULL)
305			err(1, "malloc");
306			return (p);
307			}
308
309			WHERE *
310			walloc(PERSON *pn)
311			{
312			WHERE *w;
313
314			if ((w = malloc((u_int) sizeof(WHERE))) == NULL)
315			err(1, "malloc");
316			if (pn->whead == NULL)
317			pn->whead = pn->wtail = w;
318			else {
319			pn->wtail->next = w;
320			pn->wtail = w;
321			}
322			w->next = NULL;
323			return (w);
324			}
325
326			char *
327			prphone(char *num)
328			{
329			char *p;
330			int len;
331			static char pbuf[15];
332
333			/* don't touch anything if the user has their own formatting */
334			for (p = num; *p; ++p)
335			if (!isdigit((unsigned char)*p))
336			return (num);
337			len = p - num;
338			p = pbuf;
339			switch (len) {
340			case 11: /* +0-123-456-7890 */
341			*p++ = '+';
342			p++ = num++;
343			*p++ = '-';
344			/* FALLTHROUGH */
345			case 10: /* 012-345-6789 */
346			p++ = num++;
347			p++ = num++;
348			p++ = num++;
349			*p++ = '-';
350			/* FALLTHROUGH */
351			case 7: /* 012-3456 */
352			p++ = num++;
353			p++ = num++;
354			p++ = num++;
355			break;
356			case 5: /* x0-1234 */
357			case 4: /* x1234 */
358			*p++ = 'x';
359			p++ = num++;
360			break;
361			default:
362			return (num);
363			}
364			if (len != 4) {
365			*p++ = '-';
366			p++ = num++;
367			}
368			p++ = num++;
369			p++ = num++;
370			p++ = num++;
371			*p = '\0';
372			return (pbuf);
373			}