1 /* $OpenBSD: v7.local.c,v 1.13 2001/11/21 15:26:39 millert Exp $ */ 2 /* $NetBSD: v7.local.c,v 1.8 1997/05/13 06:15:58 mikel Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static const char sccsid[] = "@(#)v7.local.c 8.1 (Berkeley) 6/6/93"; 40 #else 41 static const char rcsid[] = "$OpenBSD: v7.local.c,v 1.13 2001/11/21 15:26:39 millert Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 /* 46 * Mail -- a mail program 47 * 48 * Version 7 49 * 50 * Local routines that are installation dependent. 51 */ 52 53 #include "rcv.h" 54 #include <stdlib.h> 55 #include <fcntl.h> 56 #include "extern.h" 57 58 /* 59 * Locate the user's mailbox file (ie, the place where new, unread 60 * mail is queued). 61 */ 62 void 63 findmail(char *user, char *buf, int buflen) 64 { 65 char *mbox; 66 struct stat sb; 67 68 /* Ignore $MAIL if it is not owned by the invoking user */ 69 if ((mbox = getenv("MAIL")) && stat(mbox, &sb) == 0 && 70 sb.st_uid != getuid() && sb.st_uid != geteuid()) 71 mbox = NULL; 72 73 if (mbox) 74 (void)strlcpy(buf, mbox, buflen); 75 else 76 (void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user); 77 } 78 79 /* 80 * Get rid of the queued mail. 81 */ 82 void 83 demail(void) 84 { 85 86 if (value("keep") != NULL || rm(mailname) < 0) 87 (void)close(creat(mailname, 0600)); 88 } 89 90 /* 91 * Discover user login name. 92 */ 93 char * 94 username(void) 95 { 96 char *np; 97 uid_t uid; 98 99 if ((np = getenv("USER")) != NULL) 100 return(np); 101 if ((np = getenv("LOGNAME")) != NULL) 102 return(np); 103 if ((np = getname(uid = getuid())) != NULL) 104 return(np); 105 if ((np = getlogin()) != NULL) 106 return(np); 107 printf("Cannot associate a name with uid %u\n", (unsigned)uid); 108 return(NULL); 109 } 110