mail.c revision 36150 
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
37#ifndef lint
38#if 0
39static char sccsid[] = "@(#)mail.c	8.2 (Berkeley) 5/4/95";
40#endif
41static const char rcsid[] =
42	"$Id$";
43#endif /* not lint */
44
45/*
46 * Routines to check for mail.  (Perhaps make part of main.c?)
47 */
48
49#include "shell.h"
50#include "exec.h"	/* defines padvance() */
51#include "var.h"
52#include "output.h"
53#include "memalloc.h"
54#include "error.h"
55#include <sys/types.h>
56#include <sys/stat.h>
57
58
59#define MAXMBOXES 10
60
61
62STATIC int nmboxes;			/* number of mailboxes */
63STATIC time_t mailtime[MAXMBOXES];	/* times of mailboxes */
64
65
66
67/*
68 * Print appropriate message(s) if mail has arrived.  If the argument is
69 * nozero, then the value of MAIL has changed, so we just update the
70 * values.
71 */
72
73void
74chkmail(silent)
75	int silent;
76{
77	int i;
78	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}
121