Home | History | Annotate | Line # | Download | only in mail 
      1 /*	$NetBSD: v7.local.c,v 1.18 2006/11/28 18:45:32 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 1.18 2006/11/28 18:45:32 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 PUBLIC void
     57 findmail(const char *user, char *buf, size_t bufsize)
     58 {
     59 	char *mbox;
     60 
     61 	if (!(mbox = getenv("MAIL")))
     62 		(void)snprintf(buf, bufsize, "%s/%s", _PATH_MAILDIR, user);
     63 	else
     64 		(void)strlcpy(buf, mbox, bufsize);
     65 }
     66 
     67 /*
     68  * Get rid of the queued mail.
     69  */
     70 PUBLIC void
     71 demail(void)
     72 {
     73 
     74 	int fd;
     75 	/*
     76 	 * Do not remove the spool file, just truncate it to zero
     77 	 * bytes if possible, since we wouldn't preserve
     78 	 * owner/permissions otherwise.
     79 	 */
     80 	if (value(ENAME_KEEP) != NULL || truncate(mailname, (off_t)0) < 0)
     81 		if ((fd = creat(mailname, 0600)) != -1)
     82 			(void)close(fd);
     83 }
     84 
     85 /*
     86  * Discover user login name.
     87  */
     88 PUBLIC const char *
     89 username(void)
     90 {
     91 	const char *np;
     92 	uid_t uid;
     93 
     94 	if ((np = getenv("USER")) != NULL)
     95 		return np;
     96 	if ((np = getname(uid = getuid())) != NULL)
     97 		return np;
     98 	(void)printf("Cannot associate a name with uid %u\n", (unsigned)uid);
     99 	return NULL;
    100 }
    101