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. 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/*
34 * Routines to check for mail.  (Perhaps make part of main.c?)
35 */
36
37#include "shell.h"
38#include "mail.h"
39#include "var.h"
40#include "output.h"
41#include "memalloc.h"
42#include "error.h"
43#include <sys/types.h>
44#include <sys/stat.h>
45#include <stdlib.h>
46
47
48#define MAXMBOXES 10
49
50
51static int nmboxes;			/* number of mailboxes */
52static time_t mailtime[MAXMBOXES];	/* times of mailboxes */
53
54
55
56/*
57 * Print appropriate message(s) if mail has arrived.  If the argument is
58 * non-zero, then the value of MAIL has changed, so we just update the
59 * values.
60 */
61
62void
63chkmail(int silent)
64{
65	int i;
66	char *mpath;
67	char *p;
68	char *msg;
69	struct stackmark smark;
70	struct stat statb;
71
72	if (silent)
73		nmboxes = 10;
74	if (nmboxes == 0)
75		return;
76	setstackmark(&smark);
77	mpath = stsavestr(mpathset()? mpathval() : mailval());
78	for (i = 0 ; i < nmboxes ; i++) {
79		p = mpath;
80		if (*p == '\0')
81			break;
82		mpath = strchrnul(mpath, ':');
83		if (*mpath != '\0') {
84			*mpath++ = '\0';
85			if (p == mpath - 1)
86				continue;
87		}
88		msg = strchr(p, '%');
89		if (msg != NULL)
90			*msg++ = '\0';
91#ifdef notdef /* this is what the System V shell claims to do (it lies) */
92		if (stat(p, &statb) < 0)
93			statb.st_mtime = 0;
94		if (statb.st_mtime > mailtime[i] && ! silent) {
95			out2str(msg? msg : "you have mail");
96			out2c('\n');
97		}
98		mailtime[i] = statb.st_mtime;
99#else /* this is what it should do */
100		if (stat(p, &statb) < 0)
101			statb.st_size = 0;
102		if (statb.st_size > mailtime[i] && ! silent) {
103			out2str(msg? msg : "you have mail");
104			out2c('\n');
105		}
106		mailtime[i] = statb.st_size;
107#endif
108	}
109	nmboxes = i;
110	popstackmark(&smark);
111}
112