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8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
408 lines
9.0 KiB
C
408 lines
9.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/28/95";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <db.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <utmpx.h>
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#include "finger.h"
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#include "pathnames.h"
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static void find_idle_and_ttywrite(WHERE *);
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static void userinfo(PERSON *, struct passwd *);
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static WHERE *walloc(PERSON *);
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int
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match(struct passwd *pw, const char *user)
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{
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char *p, *t;
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char name[1024];
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if (!strcasecmp(pw->pw_name, user))
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return(1);
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/*
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* XXX
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* Why do we skip asterisks!?!?
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*/
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(void)strncpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));
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tbuf[sizeof(tbuf) - 1] = '\0';
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if (*p == '*')
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++p;
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/* Ampersands get replaced by the login name. */
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if ((p = strtok(p, ",")) == NULL)
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return(0);
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for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
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if (*t == '&') {
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(void)strncpy(t, pw->pw_name,
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sizeof(name) - (t - name));
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name[sizeof(name) - 1] = '\0';
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while (t < &name[sizeof(name) - 1] && *++t)
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continue;
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} else {
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++t;
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}
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}
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*t = '\0';
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for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
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if (!strcasecmp(p, user))
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return(1);
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return(0);
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}
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void
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enter_lastlog(PERSON *pn)
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{
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WHERE *w;
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struct utmpx *ut = NULL;
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char doit = 0;
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if (setutxdb(UTXDB_LASTLOGIN, NULL) == 0)
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ut = getutxuser(pn->name);
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if ((w = pn->whead) == NULL)
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doit = 1;
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else if (ut != NULL && ut->ut_type == USER_PROCESS) {
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/* if last login is earlier than some current login */
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for (; !doit && w != NULL; w = w->next)
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if (w->info == LOGGEDIN &&
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w->loginat < ut->ut_tv.tv_sec)
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doit = 1;
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/*
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* and if it's not any of the current logins
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* can't use time comparison because there may be a small
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* discrepancy since login calls time() twice
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*/
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for (w = pn->whead; doit && w != NULL; w = w->next)
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if (w->info == LOGGEDIN &&
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strcmp(w->tty, ut->ut_line) == 0)
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doit = 0;
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}
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if (ut != NULL && doit) {
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w = walloc(pn);
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w->info = LASTLOG;
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strcpy(w->tty, ut->ut_line);
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strcpy(w->host, ut->ut_host);
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w->loginat = ut->ut_tv.tv_sec;
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}
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endutxent();
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}
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void
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enter_where(struct utmpx *ut, PERSON *pn)
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{
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WHERE *w;
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w = walloc(pn);
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w->info = LOGGEDIN;
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strcpy(w->tty, ut->ut_line);
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strcpy(w->host, ut->ut_host);
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w->loginat = ut->ut_tv.tv_sec;
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find_idle_and_ttywrite(w);
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}
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PERSON *
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enter_person(struct passwd *pw)
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{
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DBT data, key;
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PERSON *pn;
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if (db == NULL &&
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(db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL)
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err(1, NULL);
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key.data = pw->pw_name;
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key.size = strlen(pw->pw_name);
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switch ((*db->get)(db, &key, &data, 0)) {
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case 0:
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memmove(&pn, data.data, sizeof pn);
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return (pn);
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default:
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case -1:
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err(1, "db get");
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/* NOTREACHED */
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case 1:
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++entries;
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pn = palloc();
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userinfo(pn, pw);
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pn->whead = NULL;
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data.size = sizeof(PERSON *);
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data.data = &pn;
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if ((*db->put)(db, &key, &data, 0))
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err(1, "db put");
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return (pn);
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}
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}
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PERSON *
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find_person(char *name)
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{
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struct passwd *pw;
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DBT data, key;
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PERSON *p;
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if (!db)
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return(NULL);
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if ((pw = getpwnam(name)) && hide(pw))
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return(NULL);
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key.data = name;
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key.size = strlen(name);
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if ((*db->get)(db, &key, &data, 0))
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return (NULL);
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memmove(&p, data.data, sizeof p);
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return (p);
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}
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PERSON *
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palloc(void)
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{
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PERSON *p;
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if ((p = malloc(sizeof(PERSON))) == NULL)
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err(1, NULL);
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return(p);
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}
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static WHERE *
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walloc(PERSON *pn)
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{
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WHERE *w;
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if ((w = malloc(sizeof(WHERE))) == NULL)
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err(1, NULL);
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if (pn->whead == NULL)
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pn->whead = pn->wtail = w;
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else {
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pn->wtail->next = w;
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pn->wtail = w;
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}
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w->next = NULL;
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return(w);
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}
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char *
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prphone(char *num)
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{
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char *p;
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int len;
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static char pbuf[20];
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/* don't touch anything if the user has their own formatting */
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for (p = num; *p; ++p)
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if (!isdigit(*p))
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return(num);
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len = p - num;
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p = pbuf;
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switch(len) {
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case 11: /* +0-123-456-7890 */
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*p++ = '+';
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*p++ = *num++;
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*p++ = '-';
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/* FALLTHROUGH */
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case 10: /* 012-345-6789 */
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*p++ = *num++;
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*p++ = *num++;
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*p++ = *num++;
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*p++ = '-';
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/* FALLTHROUGH */
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case 7: /* 012-3456 */
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*p++ = *num++;
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*p++ = *num++;
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*p++ = *num++;
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break;
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case 5: /* x0-1234 */
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case 4: /* x1234 */
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*p++ = 'x';
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*p++ = *num++;
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break;
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default:
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return(num);
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}
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if (len != 4) {
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*p++ = '-';
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*p++ = *num++;
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}
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*p++ = *num++;
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*p++ = *num++;
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*p++ = *num++;
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*p = '\0';
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return(pbuf);
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}
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static void
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find_idle_and_ttywrite(WHERE *w)
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{
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struct stat sb;
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time_t touched;
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int error;
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(void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty);
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error = stat(tbuf, &sb);
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if (error < 0 && errno == ENOENT) {
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/*
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* The terminal listed is not actually a terminal (i.e.,
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* ":0"). This is a failure, so we'll skip printing
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* out the idle time, which is non-ideal but better
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* than a bogus warning and idle time.
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*/
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w->idletime = -1;
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return;
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} else if (error < 0) {
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warn("%s", tbuf);
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w->idletime = -1;
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return;
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}
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touched = sb.st_atime;
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if (touched < w->loginat) {
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/* tty untouched since before login */
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touched = w->loginat;
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}
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w->idletime = now < touched ? 0 : now - touched;
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#define TALKABLE 0220 /* tty is writable if 220 mode */
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w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
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}
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static void
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userinfo(PERSON *pn, struct passwd *pw)
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{
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char *p, *t;
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char *bp, name[1024];
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struct stat sb;
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pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
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pn->uid = pw->pw_uid;
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if ((pn->name = strdup(pw->pw_name)) == NULL)
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err(1, "strdup failed");
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if ((pn->dir = strdup(pw->pw_dir)) == NULL)
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err(1, "strdup failed");
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if ((pn->shell = strdup(pw->pw_shell)) == NULL)
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err(1, "strdup failed");
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/* why do we skip asterisks!?!? */
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(void)strncpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
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tbuf[sizeof(tbuf) - 1] = '\0';
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if (*bp == '*')
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++bp;
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/* ampersands get replaced by the login name */
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if (!(p = strsep(&bp, ",")))
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return;
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for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
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if (*t == '&') {
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(void)strncpy(t, pw->pw_name,
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sizeof(name) - (t - name));
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name[sizeof(name) - 1] = '\0';
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if (islower(*t))
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*t = toupper(*t);
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while (t < &name[sizeof(name) - 1] && *++t)
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continue;
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} else {
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++t;
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}
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}
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*t = '\0';
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if ((pn->realname = strdup(name)) == NULL)
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err(1, "strdup failed");
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pn->office = ((p = strsep(&bp, ",")) && *p) ?
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strdup(p) : NULL;
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pn->officephone = ((p = strsep(&bp, ",")) && *p) ?
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strdup(p) : NULL;
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pn->homephone = ((p = strsep(&bp, ",")) && *p) ?
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strdup(p) : NULL;
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(void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pw->pw_name);
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pn->mailrecv = -1; /* -1 == not_valid */
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if (stat(tbuf, &sb) < 0) {
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if (errno != ENOENT) {
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warn("%s", tbuf);
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return;
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}
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} else if (sb.st_size != 0) {
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pn->mailrecv = sb.st_mtime;
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pn->mailread = sb.st_atime;
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}
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}
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/*
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* Is this user hiding from finger?
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* If ~<user>/.nofinger exists, return 1 (hide), else return 0 (nohide).
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* Nobody can hide from root.
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*/
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int
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hide(struct passwd *pw)
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{
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struct stat st;
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char buf[MAXPATHLEN];
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if (invoker_root || !pw->pw_dir)
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return 0;
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snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, _PATH_NOFINGER);
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if (stat(buf, &st) == 0)
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return 1;
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return 0;
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}
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