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-rw-r--r--usr.bin/finger/util.c405
1 files changed, 405 insertions, 0 deletions
diff --git a/usr.bin/finger/util.c b/usr.bin/finger/util.c
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+/*
+ * Copyright (c) 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * 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.
+ * 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.
+ */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/28/95";
+#endif
+#endif
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <db.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <utmpx.h>
+#include "finger.h"
+#include "pathnames.h"
+
+static void find_idle_and_ttywrite(WHERE *);
+static void userinfo(PERSON *, struct passwd *);
+static WHERE *walloc(PERSON *);
+
+int
+match(struct passwd *pw, const char *user)
+{
+ char *p, *t;
+ char name[1024];
+
+ if (!strcasecmp(pw->pw_name, user))
+ return(1);
+
+ /*
+ * XXX
+ * Why do we skip asterisks!?!?
+ */
+ (void)strncpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));
+ tbuf[sizeof(tbuf) - 1] = '\0';
+ if (*p == '*')
+ ++p;
+
+ /* Ampersands get replaced by the login name. */
+ if ((p = strtok(p, ",")) == NULL)
+ return(0);
+
+ for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
+ if (*t == '&') {
+ (void)strncpy(t, pw->pw_name,
+ sizeof(name) - (t - name));
+ name[sizeof(name) - 1] = '\0';
+ while (t < &name[sizeof(name) - 1] && *++t)
+ continue;
+ } else {
+ ++t;
+ }
+ }
+ *t = '\0';
+ for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
+ if (!strcasecmp(p, user))
+ return(1);
+ return(0);
+}
+
+void
+enter_lastlog(PERSON *pn)
+{
+ WHERE *w;
+ struct utmpx *ut = NULL;
+ char doit = 0;
+
+ if (setutxdb(UTXDB_LASTLOGIN, NULL) == 0)
+ ut = getutxuser(pn->name);
+ if ((w = pn->whead) == NULL)
+ doit = 1;
+ else if (ut != NULL && ut->ut_type == USER_PROCESS) {
+ /* if last login is earlier than some current login */
+ for (; !doit && w != NULL; w = w->next)
+ if (w->info == LOGGEDIN &&
+ w->loginat < ut->ut_tv.tv_sec)
+ doit = 1;
+ /*
+ * and if it's not any of the current logins
+ * can't use time comparison because there may be a small
+ * discrepancy since login calls time() twice
+ */
+ for (w = pn->whead; doit && w != NULL; w = w->next)
+ if (w->info == LOGGEDIN &&
+ strcmp(w->tty, ut->ut_line) == 0)
+ doit = 0;
+ }
+ if (ut != NULL && doit) {
+ w = walloc(pn);
+ w->info = LASTLOG;
+ strcpy(w->tty, ut->ut_line);
+ strcpy(w->host, ut->ut_host);
+ w->loginat = ut->ut_tv.tv_sec;
+ }
+ endutxent();
+}
+
+void
+enter_where(struct utmpx *ut, PERSON *pn)
+{
+ WHERE *w;
+
+ w = walloc(pn);
+ w->info = LOGGEDIN;
+ strcpy(w->tty, ut->ut_line);
+ strcpy(w->host, ut->ut_host);
+ w->loginat = ut->ut_tv.tv_sec;
+ find_idle_and_ttywrite(w);
+}
+
+PERSON *
+enter_person(struct passwd *pw)
+{
+ DBT data, key;
+ PERSON *pn;
+
+ if (db == NULL &&
+ (db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL)
+ err(1, NULL);
+
+ key.data = pw->pw_name;
+ key.size = strlen(pw->pw_name);
+
+ switch ((*db->get)(db, &key, &data, 0)) {
+ case 0:
+ memmove(&pn, data.data, sizeof pn);
+ return (pn);
+ default:
+ case -1:
+ err(1, "db get");
+ /* NOTREACHED */
+ case 1:
+ ++entries;
+ pn = palloc();
+ userinfo(pn, pw);
+ pn->whead = NULL;
+
+ data.size = sizeof(PERSON *);
+ data.data = &pn;
+ if ((*db->put)(db, &key, &data, 0))
+ err(1, "db put");
+ return (pn);
+ }
+}
+
+PERSON *
+find_person(char *name)
+{
+ struct passwd *pw;
+
+ DBT data, key;
+ PERSON *p;
+
+ if (!db)
+ return(NULL);
+
+ if ((pw = getpwnam(name)) && hide(pw))
+ return(NULL);
+
+ key.data = name;
+ key.size = strlen(name);
+
+ if ((*db->get)(db, &key, &data, 0))
+ return (NULL);
+ memmove(&p, data.data, sizeof p);
+ return (p);
+}
+
+PERSON *
+palloc(void)
+{
+ PERSON *p;
+
+ if ((p = malloc(sizeof(PERSON))) == NULL)
+ err(1, NULL);
+ return(p);
+}
+
+static WHERE *
+walloc(PERSON *pn)
+{
+ WHERE *w;
+
+ if ((w = malloc(sizeof(WHERE))) == NULL)
+ err(1, NULL);
+ 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[20];
+
+ /* don't touch anything if the user has their own formatting */
+ for (p = num; *p; ++p)
+ if (!isdigit(*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);
+}
+
+static void
+find_idle_and_ttywrite(WHERE *w)
+{
+ struct stat sb;
+ time_t touched;
+ int error;
+
+ (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty);
+
+ error = stat(tbuf, &sb);
+ if (error < 0 && errno == ENOENT) {
+ /*
+ * The terminal listed is not actually a terminal (i.e.,
+ * ":0"). This is a failure, so we'll skip printing
+ * out the idle time, which is non-ideal but better
+ * than a bogus warning and idle time.
+ */
+ w->idletime = -1;
+ return;
+ } else if (error < 0) {
+ warn("%s", tbuf);
+ w->idletime = -1;
+ return;
+ }
+ touched = sb.st_atime;
+ if (touched < w->loginat) {
+ /* tty untouched since before login */
+ touched = w->loginat;
+ }
+ w->idletime = now < touched ? 0 : now - touched;
+
+#define TALKABLE 0220 /* tty is writable if 220 mode */
+ w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
+}
+
+static void
+userinfo(PERSON *pn, struct passwd *pw)
+{
+ char *p, *t;
+ char *bp, name[1024];
+ struct stat sb;
+
+ pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
+
+ pn->uid = pw->pw_uid;
+ if ((pn->name = strdup(pw->pw_name)) == NULL)
+ err(1, "strdup failed");
+ if ((pn->dir = strdup(pw->pw_dir)) == NULL)
+ err(1, "strdup failed");
+ if ((pn->shell = strdup(pw->pw_shell)) == NULL)
+ err(1, "strdup failed");
+
+ /* why do we skip asterisks!?!? */
+ (void)strncpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
+ tbuf[sizeof(tbuf) - 1] = '\0';
+ if (*bp == '*')
+ ++bp;
+
+ /* ampersands get replaced by the login name */
+ if (!(p = strsep(&bp, ",")))
+ return;
+ for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
+ if (*t == '&') {
+ (void)strncpy(t, pw->pw_name,
+ sizeof(name) - (t - name));
+ name[sizeof(name) - 1] = '\0';
+ if (islower(*t))
+ *t = toupper(*t);
+ while (t < &name[sizeof(name) - 1] && *++t)
+ continue;
+ } else {
+ ++t;
+ }
+ }
+ *t = '\0';
+ if ((pn->realname = strdup(name)) == NULL)
+ err(1, "strdup failed");
+ pn->office = ((p = strsep(&bp, ",")) && *p) ?
+ strdup(p) : NULL;
+ pn->officephone = ((p = strsep(&bp, ",")) && *p) ?
+ strdup(p) : NULL;
+ pn->homephone = ((p = strsep(&bp, ",")) && *p) ?
+ strdup(p) : NULL;
+ (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pw->pw_name);
+ pn->mailrecv = -1; /* -1 == not_valid */
+ 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;
+ }
+}
+
+/*
+ * Is this user hiding from finger?
+ * If ~<user>/.nofinger exists, return 1 (hide), else return 0 (nohide).
+ * Nobody can hide from root.
+ */
+
+int
+hide(struct passwd *pw)
+{
+ struct stat st;
+ char buf[MAXPATHLEN];
+
+ if (invoker_root || !pw->pw_dir)
+ return 0;
+
+ snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, _PATH_NOFINGER);
+
+ if (stat(buf, &st) == 0)
+ return 1;
+
+ return 0;
+}
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