1 /* $OpenBSD: v7.local.c,v 1.14 2003/06/03 02:56:11 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static const char sccsid[] = "@(#)v7.local.c 8.1 (Berkeley) 6/6/93"; 36 #else 37 static const char rcsid[] = "$OpenBSD: v7.local.c,v 1.14 2003/06/03 02:56:11 millert 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 <stdlib.h> 51 #include <fcntl.h> 52 #include "extern.h" 53 54 /* 55 * Locate the user's mailbox file (ie, the place where new, unread 56 * mail is queued). 57 */ 58 void 59 findmail(char *user, char *buf, int buflen) 60 { 61 char *mbox; 62 struct stat sb; 63 64 /* Ignore $MAIL if it is not owned by the invoking user */ 65 if ((mbox = getenv("MAIL")) && stat(mbox, &sb) == 0 && 66 sb.st_uid != getuid() && sb.st_uid != geteuid()) 67 mbox = NULL; 68 69 if (mbox) 70 (void)strlcpy(buf, mbox, buflen); 71 else 72 (void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user); 73 } 74 75 /* 76 * Get rid of the queued mail. 77 */ 78 void 79 demail(void) 80 { 81 82 if (value("keep") != NULL || rm(mailname) < 0) 83 (void)close(creat(mailname, 0600)); 84 } 85 86 /* 87 * Discover user login name. 88 */ 89 char * 90 username(void) 91 { 92 char *np; 93 uid_t uid; 94 95 if ((np = getenv("USER")) != NULL) 96 return(np); 97 if ((np = getenv("LOGNAME")) != NULL) 98 return(np); 99 if ((np = getname(uid = getuid())) != NULL) 100 return(np); 101 if ((np = getlogin()) != NULL) 102 return(np); 103 printf("Cannot associate a name with uid %u\n", (unsigned)uid); 104 return(NULL); 105 } 106