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 * 4. 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
35static char sccsid[] = "@(#)mail.c	8.2 (Berkeley) 5/4/95";
36#endif
37#endif /* not lint */
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD$");
40
41/*
42 * Routines to check for mail.  (Perhaps make part of main.c?)
43 */
44
45#include "shell.h"
46#include "exec.h"	/* defines padvance() */
47#include "mail.h"
48#include "var.h"
49#include "output.h"
50#include "memalloc.h"
51#include "error.h"
52#include <sys/types.h>
53#include <sys/stat.h>
54#include <stdlib.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(int silent)
73{
74	int i;
75	const char *mpath;
76	char *p;
77	char *q;
78	struct stackmark smark;
79	struct stat statb;
80
81	if (silent)
82		nmboxes = 10;
83	if (nmboxes == 0)
84		return;
85	setstackmark(&smark);
86	mpath = mpathset()? mpathval() : mailval();
87	for (i = 0 ; i < nmboxes ; i++) {
88		p = padvance(&mpath, nullstr);
89		if (p == NULL)
90			break;
91		if (*p == '\0')
92			continue;
93		for (q = p ; *q ; q++);
94		if (q[-1] != '/')
95			abort();
96		q[-1] = '\0';			/* delete trailing '/' */
97#ifdef notdef /* this is what the System V shell claims to do (it lies) */
98		if (stat(p, &statb) < 0)
99			statb.st_mtime = 0;
100		if (statb.st_mtime > mailtime[i] && ! silent) {
101			out2str(pathopt? pathopt : "you have mail");
102			out2c('\n');
103		}
104		mailtime[i] = statb.st_mtime;
105#else /* this is what it should do */
106		if (stat(p, &statb) < 0)
107			statb.st_size = 0;
108		if (statb.st_size > mailtime[i] && ! silent) {
109			out2str(pathopt? pathopt : "you have mail");
110			out2c('\n');
111		}
112		mailtime[i] = statb.st_size;
113#endif
114	}
115	nmboxes = i;
116	popstackmark(&smark);
117}
118