mail_cmds/mail/v7.local.c

   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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 #if 0
  36 static char sccsid[] = "@(#)v7.local.c  8.1 (Berkeley) 6/6/93";
  37 #endif
  38 static const char rcsid[] =
  39   "$FreeBSD: src/usr.bin/mail/v7.local.c,v 1.5 2002/06/30 05:25:06 obrien Exp $";
  40 #endif /* not lint */
  41
  42 #include <sys/cdefs.h>
  43
  44 /*
  45  * Mail -- a mail program
  46  *
  47  * Version 7
  48  *
  49  * Local routines that are installation dependent.
  50  */
  51
  52 #include "rcv.h"
  53 #include <fcntl.h>
  54 #include "extern.h"
  55
  56 /*
  57  * Locate the user's mailbox file (ie, the place where new, unread
  58  * mail is queued).
  59  */
  60 void
  61 findmail(user, buf, buflen)
  62         char *user, *buf;
  63         int buflen;
  64 {
  65         char *tmp = getenv("MAIL");
  66
  67         if (tmp == NULL)
  68                 (void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user);
  69         else
  70                 (void)strlcpy(buf, tmp, buflen);
  71 }
  72
  73 /*
  74  * Get rid of the queued mail.
  75  */
  76 void
  77 demail()
  78 {
  79
  80         if (value("keep") != NULL || rm(mailname) < 0)
  81                 (void)close(open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600));
  82 }
  83
  84 /*
  85  * Discover user login name.
  86  */
  87 char *
  88 username()
  89 {
  90         char *np;
  91         uid_t uid;
  92
  93         if ((np = getenv("USER")) != NULL)
  94                 return (np);
  95         if ((np = getenv("LOGNAME")) != NULL)
  96                 return (np);
  97         if ((np = getname(uid = getuid())) != NULL)
  98                 return (np);
  99         printf("Cannot associate a name with uid %u\n", (unsigned)uid);
 100         return (NULL);
 101 }