1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)v7.local.c 8.1 (Berkeley) 6/6/93 30 * $FreeBSD: src/usr.bin/mail/v7.local.c,v 1.2.8.3 2003/01/06 05:46:04 mikeh Exp $ 31 * $DragonFly: src/usr.bin/mail/v7.local.c,v 1.4 2004/09/08 03:01:11 joerg Exp $ 32 */ 33 34 /* 35 * Mail -- a mail program 36 * 37 * Version 7 38 * 39 * Local routines that are installation dependent. 40 */ 41 42 #include "rcv.h" 43 #include <fcntl.h> 44 #include "extern.h" 45 46 /* 47 * Locate the user's mailbox file (ie, the place where new, unread 48 * mail is queued). 49 */ 50 void 51 findmail(char *user, char *buf, int buflen) 52 { 53 char *tmp = getenv("MAIL"); 54 55 if (tmp == NULL) 56 snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user); 57 else 58 strlcpy(buf, tmp, buflen); 59 } 60 61 /* 62 * Get rid of the queued mail. 63 */ 64 void 65 demail(void) 66 { 67 if (value("keep") != NULL || rm(mailname) < 0) 68 close(open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600)); 69 } 70 71 /* 72 * Discover user login name. 73 */ 74 char * 75 username(void) 76 { 77 char *np; 78 uid_t uid; 79 80 if ((np = getenv("USER")) != NULL) 81 return (np); 82 if ((np = getenv("LOGNAME")) != NULL) 83 return (np); 84 if ((np = getname(uid = getuid())) != NULL) 85 return (np); 86 printf("Cannot associate a name with uid %u\n", (unsigned)uid); 87 return (NULL); 88 } 89