Annotation of src/usr.bin/finger/util.c, Revision 1.33
1.33 ! deraadt 1: /* $OpenBSD: util.c,v 1.32 2015/12/26 20:51:35 guenther Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*
4: * Copyright (c) 1989 The Regents of the University of California.
5: * All rights reserved.
1.5 kstailey 6: * Portions Copyright (c) 1983, 1995, 1996 Eric P. Allman (woof!)
1.1 deraadt 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.
1.16 millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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:
1.5 kstailey 36: #include <sys/types.h>
37: #include <sys/uio.h>
1.1 deraadt 38: #include <sys/stat.h>
1.6 kstailey 39: #include <err.h>
1.1 deraadt 40: #include <stdio.h>
41: #include <stdlib.h>
42: #include <ctype.h>
43: #include <string.h>
44: #include <paths.h>
45: #include <errno.h>
1.11 millert 46: #include <fcntl.h>
1.5 kstailey 47: #include <unistd.h>
1.6 kstailey 48: #include <vis.h>
1.1 deraadt 49: #include "finger.h"
1.5 kstailey 50: #include "extern.h"
1.1 deraadt 51:
1.19 deraadt 52: char *estrdup(char *);
53: WHERE *walloc(PERSON *pn);
54: void find_idle_and_ttywrite(WHERE *);
55: void userinfo(PERSON *, struct passwd *);
1.13 deraadt 56:
1.5 kstailey 57: void
1.17 deraadt 58: find_idle_and_ttywrite(WHERE *w)
1.1 deraadt 59: {
60: struct stat sb;
61:
1.5 kstailey 62: (void)snprintf(tbuf, sizeof(tbuf), "%s%s", _PATH_DEV, w->tty);
1.1 deraadt 63: if (stat(tbuf, &sb) < 0) {
1.3 downsj 64: /* Don't bitch about it, just handle it... */
65: w->idletime = 0;
66: w->writable = 0;
67:
1.1 deraadt 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:
1.13 deraadt 76: char *
77: estrdup(char *s)
78: {
79: char *p = strdup(s);
1.14 deraadt 80: if (!p)
1.15 deraadt 81: err(1, "strdup");
1.13 deraadt 82: return (p);
83: }
84:
1.5 kstailey 85: void
1.17 deraadt 86: userinfo(PERSON *pn, struct passwd *pw)
1.1 deraadt 87: {
1.5 kstailey 88: char *p;
89: char *bp, name[1024];
1.1 deraadt 90: struct stat sb;
1.29 millert 91: int len;
1.1 deraadt 92:
93: pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
1.29 millert 94: pn->mailrecv = -1; /* -1 == not_valid */
1.1 deraadt 95:
96: pn->uid = pw->pw_uid;
1.13 deraadt 97: pn->name = estrdup(pw->pw_name);
98: pn->dir = estrdup(pw->pw_dir);
99: pn->shell = estrdup(pw->pw_shell);
1.1 deraadt 100:
1.26 millert 101: (void)strlcpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
1.1 deraadt 102:
103: /* ampersands get replaced by the login name */
1.5 kstailey 104: if (!(p = strsep(&bp, ",")))
1.1 deraadt 105: return;
1.5 kstailey 106: expandusername(p, pw->pw_name, name, sizeof(name));
1.33 ! deraadt 107: if (stravis(&pn->realname, name, VIS_SAFE|VIS_NOSLASH) == -1)
1.29 millert 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,
1.5 kstailey 122: pw->pw_name);
1.29 millert 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;
1.1 deraadt 132: }
133: }
134: }
135:
1.5 kstailey 136: int
1.17 deraadt 137: match(struct passwd *pw, char *user)
1.1 deraadt 138: {
1.5 kstailey 139: char *p, *t;
1.1 deraadt 140: char name[1024];
141:
1.26 millert 142: (void)strlcpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));
1.1 deraadt 143:
144: /* ampersands get replaced by the login name */
145: if (!(p = strtok(p, ",")))
1.20 tedu 146: return (0);
1.5 kstailey 147: expandusername(p, pw->pw_name, name, sizeof(name));
1.7 kstailey 148: for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
1.1 deraadt 149: if (!strcasecmp(p, user))
1.20 tedu 150: return (1);
151: return (0);
1.1 deraadt 152: }
153:
1.5 kstailey 154: /* inspired by usr.sbin/sendmail/util.c::buildfname */
155: void
1.17 deraadt 156: expandusername(char *gecos, char *login, char *buf, int buflen)
1.5 kstailey 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 */
1.21 niallo 169: strlcpy(buf, login, buflen);
1.5 kstailey 170: buf[buflen - 1] = '\0';
171: return;
172: }
173: if (*p == '&') {
174: /* interpolate full name */
1.21 niallo 175: strlcpy(bp, login, buflen - (bp - buf));
1.24 deraadt 176: *bp = toupper((unsigned char)*bp);
1.5 kstailey 177: bp += strlen(bp);
178: }
179: else
180: *bp++ = *p;
181: }
182: *bp = '\0';
183: }
184:
185: void
1.17 deraadt 186: enter_lastlog(PERSON *pn)
1.1 deraadt 187: {
1.5 kstailey 188: WHERE *w;
1.1 deraadt 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) {
1.11 millert 195: fd = open(_PATH_LASTLOG, O_RDONLY);
1.1 deraadt 196: opened = 1;
197: }
198: if (fd == -1 ||
1.32 guenther 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: }
1.1 deraadt 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:
1.5 kstailey 233: void
1.17 deraadt 234: enter_where(struct utmp *ut, PERSON *pn)
1.1 deraadt 235: {
1.5 kstailey 236: WHERE *w = walloc(pn);
1.1 deraadt 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 *
1.17 deraadt 248: enter_person(struct passwd *pw)
1.1 deraadt 249: {
1.5 kstailey 250: PERSON *pn, **pp;
1.1 deraadt 251:
252: for (pp = htab + hash(pw->pw_name);
1.20 tedu 253: *pp != NULL && strcmp((*pp)->name, pw->pw_name) != 0;
254: pp = &(*pp)->hlink)
1.1 deraadt 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: }
1.20 tedu 271: return (pn);
1.1 deraadt 272: }
273:
274: PERSON *
1.17 deraadt 275: find_person(char *name)
1.1 deraadt 276: {
1.5 kstailey 277: PERSON *pn;
1.1 deraadt 278:
279: /* name may be only UT_NAMESIZE long and not terminated */
280: for (pn = htab[hash(name)];
1.20 tedu 281: pn != NULL && strncmp(pn->name, name, UT_NAMESIZE) != 0;
282: pn = pn->hlink)
1.1 deraadt 283: ;
1.20 tedu 284: return (pn);
1.1 deraadt 285: }
286:
1.5 kstailey 287: int
1.17 deraadt 288: hash(char *name)
1.1 deraadt 289: {
1.5 kstailey 290: int h, i;
1.1 deraadt 291:
292: h = 0;
293: /* name may be only UT_NAMESIZE long and not terminated */
294: for (i = UT_NAMESIZE; --i >= 0 && *name;)
1.5 kstailey 295: h = ((h << 2 | h >> (HBITS - 2)) ^ *name++) & HMASK;
1.20 tedu 296: return (h);
1.1 deraadt 297: }
298:
299: PERSON *
1.17 deraadt 300: palloc(void)
1.1 deraadt 301: {
302: PERSON *p;
303:
1.31 deraadt 304: if ((p = malloc((u_int) sizeof(PERSON))) == NULL)
1.10 mickey 305: err(1, "malloc");
1.20 tedu 306: return (p);
1.1 deraadt 307: }
308:
309: WHERE *
1.17 deraadt 310: walloc(PERSON *pn)
1.1 deraadt 311: {
1.5 kstailey 312: WHERE *w;
1.1 deraadt 313:
1.31 deraadt 314: if ((w = malloc((u_int) sizeof(WHERE))) == NULL)
1.10 mickey 315: err(1, "malloc");
1.1 deraadt 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;
1.20 tedu 323: return (w);
1.1 deraadt 324: }
325:
326: char *
1.17 deraadt 327: prphone(char *num)
1.1 deraadt 328: {
1.5 kstailey 329: char *p;
1.1 deraadt 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)
1.24 deraadt 335: if (!isdigit((unsigned char)*p))
1.20 tedu 336: return (num);
1.1 deraadt 337: len = p - num;
338: p = pbuf;
1.20 tedu 339: switch (len) {
1.1 deraadt 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:
1.20 tedu 362: return (num);
1.1 deraadt 363: }
364: if (len != 4) {
365: *p++ = '-';
366: *p++ = *num++;
367: }
368: *p++ = *num++;
369: *p++ = *num++;
370: *p++ = *num++;
371: *p = '\0';
1.20 tedu 372: return (pbuf);
1.1 deraadt 373: }
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