1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #ifndef lint 33 #if 0 34 static char sccsid[] = "@(#)v7.local.c 8.1 (Berkeley) 6/6/93"; 35 #endif 36 #endif /* not lint */ 37 #include <sys/cdefs.h> 38 /* 39 * Mail -- a mail program 40 * 41 * Version 7 42 * 43 * Local routines that are installation dependent. 44 */ 45 46 #include "rcv.h" 47 #include <fcntl.h> 48 #include "extern.h" 49 50 /* 51 * Locate the user's mailbox file (ie, the place where new, unread 52 * mail is queued). 53 */ 54 void 55 findmail(char *user, char *buf, int buflen) 56 { 57 char *tmp = getenv("MAIL"); 58 59 if (tmp == NULL) 60 (void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user); 61 else 62 (void)strlcpy(buf, tmp, buflen); 63 } 64 65 /* 66 * Get rid of the queued mail. 67 */ 68 void 69 demail(void) 70 { 71 int fd; 72 73 if (value("keep") != NULL || rm(mailname) < 0) 74 if ((fd = open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600)) >= 75 0) 76 (void)close(fd); 77 } 78 79 /* 80 * Discover user login name. 81 */ 82 char * 83 username(void) 84 { 85 char *np; 86 uid_t uid; 87 88 if ((np = getenv("USER")) != NULL) 89 return (np); 90 if ((np = getenv("LOGNAME")) != NULL) 91 return (np); 92 if ((np = getname(uid = getuid())) != NULL) 93 return (np); 94 printf("Cannot associate a name with uid %u\n", (unsigned)uid); 95 return (NULL); 96 } 97