bin/sh/mail.c

   1 /*      $NetBSD: mail.c,v 1.16 2003/08/07 09:05:33 agc Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Kenneth Almquist.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)mail.c      8.2 (Berkeley) 5/4/95";
  39 #else
  40 __RCSID("$NetBSD: mail.c,v 1.16 2003/08/07 09:05:33 agc Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 /*
  45  * Routines to check for mail.  (Perhaps make part of main.c?)
  46  */
  47 #include <sys/types.h>
  48 #include <sys/stat.h>
  49 #include <stdlib.h>
  50
  51 #include "shell.h"
  52 #include "exec.h"       /* defines padvance() */
  53 #include "var.h"
  54 #include "output.h"
  55 #include "memalloc.h"
  56 #include "error.h"
  57 #include "mail.h"
  58
  59
  60 #define MAXMBOXES 10
  61
  62
  63 STATIC int nmboxes;                     /* number of mailboxes */
  64 STATIC time_t mailtime[MAXMBOXES];      /* times of mailboxes */
  65
  66
  67
  68 /*
  69  * Print appropriate message(s) if mail has arrived.  If the argument is
  70  * nozero, then the value of MAIL has changed, so we just update the
  71  * values.
  72  */
  73
  74 void
  75 chkmail(int silent)
  76 {
  77         int i;
  78         const char *mpath;
  79         char *p;
  80         char *q;
  81         struct stackmark smark;
  82         struct stat statb;
  83
  84         if (silent)
  85                 nmboxes = 10;
  86         if (nmboxes == 0)
  87                 return;
  88         setstackmark(&smark);
  89         mpath = mpathset() ? mpathval() : mailval();
  90         for (i = 0 ; i < nmboxes ; i++) {
  91                 p = padvance(&mpath, nullstr);
  92                 if (p == NULL)
  93                         break;
  94                 if (*p == '\0')
  95                         continue;
  96                 for (q = p ; *q ; q++);
  97                 if (q[-1] != '/')
  98                         abort();
  99                 q[-1] = '\0';                   /* delete trailing '/' */
 100 #ifdef notdef /* this is what the System V shell claims to do (it lies) */
 101                 if (stat(p, &statb) < 0)
 102                         statb.st_mtime = 0;
 103                 if (statb.st_mtime > mailtime[i] && ! silent) {
 104                         out2str(pathopt ? pathopt : "you have mail");
 105                         out2c('\n');
 106                 }
 107                 mailtime[i] = statb.st_mtime;
 108 #else /* this is what it should do */
 109                 if (stat(p, &statb) < 0)
 110                         statb.st_size = 0;
 111                 if (statb.st_size > mailtime[i] && ! silent) {
 112                         out2str(pathopt ? pathopt : "you have mail");
 113                         out2c('\n');
 114                 }
 115                 mailtime[i] = statb.st_size;
 116 #endif
 117         }
 118         nmboxes = i;
 119         popstackmark(&smark);
 120 }