mail.c revision 3044 
1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
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 *	$Id$
37 */
38
39#ifndef lint
40static char sccsid[] = "@(#)mail.c	8.1 (Berkeley) 5/31/93";
41#endif /* not lint */
42
43/*
44 * Routines to check for mail.  (Perhaps make part of main.c?)
45 */
46
47#include "shell.h"
48#include "exec.h"	/* defines padvance() */
49#include "var.h"
50#include "output.h"
51#include "memalloc.h"
52#include "error.h"
53#include <sys/types.h>
54#include <sys/stat.h>
55
56
57#define MAXMBOXES 10
58
59
60STATIC int nmboxes;			/* number of mailboxes */
61STATIC time_t mailtime[MAXMBOXES];	/* times of mailboxes */
62
63
64
65/*
66 * Print appropriate message(s) if mail has arrived.  If the argument is
67 * nozero, then the value of MAIL has changed, so we just update the
68 * values.
69 */
70
71void
72chkmail(silent) {
73	register int i;
74	char *mpath;
75	char *p;
76	register char *q;
77	struct stackmark smark;
78	struct stat statb;
79
80	if (silent)
81		nmboxes = 10;
82	if (nmboxes == 0)
83		return;
84	setstackmark(&smark);
85	mpath = mpathset()? mpathval() : mailval();
86	for (i = 0 ; i < nmboxes ; i++) {
87		p = padvance(&mpath, nullstr);
88		if (p == NULL)
89			break;
90		if (*p == '\0')
91			continue;
92		for (q = p ; *q ; q++);
93		if (q[-1] != '/')
94			abort();
95		q[-1] = '\0';			/* delete trailing '/' */
96#ifdef notdef /* this is what the System V shell claims to do (it lies) */
97		if (stat(p, &statb) < 0)
98			statb.st_mtime = 0;
99		if (statb.st_mtime > mailtime[i] && ! silent) {
100			out2str(pathopt? pathopt : "you have mail");
101			out2c('\n');
102		}
103		mailtime[i] = statb.st_mtime;
104#else /* this is what it should do */
105		if (stat(p, &statb) < 0)
106			statb.st_size = 0;
107		if (statb.st_size > mailtime[i] && ! silent) {
108			out2str(pathopt? pathopt : "you have mail");
109			out2c('\n');
110		}
111		mailtime[i] = statb.st_size;
112#endif
113	}
114	nmboxes = i;
115	popstackmark(&smark);
116}
117