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v7.local.c revision 1.17 
      1 /*	$NetBSD: v7.local.c,v 1.17 2006/05/01 23:06:55 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)v7.local.c	8.1 (Berkeley) 6/6/93";
     36 #else
     37 __RCSID("$NetBSD: v7.local.c,v 1.17 2006/05/01 23:06:55 christos Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 /*
     42  * Mail -- a mail program
     43  *
     44  * Version 7
     45  *
     46  * Local routines that are installation dependent.
     47  */
     48 
     49 #include "rcv.h"
     50 #include "extern.h"
     51 
     52 /*
     53  * Locate the user's mailbox file (ie, the place where new, unread
     54  * mail is queued).
     55  */
     56 void
     57 findmail(const char *user, char *buf)
     58 {
     59 	char *mbox;
     60 
     61 	if (!(mbox = getenv("MAIL")))
     62 		(void)snprintf(buf, PATHSIZE, "%s/%s", _PATH_MAILDIR, user);
     63 	else {
     64 		(void)strncpy(buf, mbox, PATHSIZE - 1);
     65 		buf[PATHSIZE - 1] = '\0';
     66 	}
     67 }
     68 
     69 /*
     70  * Get rid of the queued mail.
     71  */
     72 void
     73 demail(void)
     74 {
     75 
     76 	int fd;
     77 	/*
     78 	 * Do not remove the spool file, just truncate it to zero
     79 	 * bytes if possible, since we wouldn't preserve
     80 	 * owner/permissions otherwise.
     81 	 */
     82 	if (value("keep") != NULL || truncate(mailname, (off_t)0) < 0)
     83 		if ((fd = creat(mailname, 0600)) != -1)
     84 			(void)close(fd);
     85 }
     86 
     87 /*
     88  * Discover user login name.
     89  */
     90 const char *
     91 username(void)
     92 {
     93 	const char *np;
     94 	uid_t uid;
     95 
     96 	if ((np = getenv("USER")) != NULL)
     97 		return np;
     98 	if ((np = getname(uid = getuid())) != NULL)
     99 		return np;
    100 	(void)printf("Cannot associate a name with uid %u\n", (unsigned)uid);
    101 	return NULL;
    102 }
    103