1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
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/*
36 * Routines to check for mail. (Perhaps make part of main.c?)
37 */
38
39#include "mail.h"
40#include "error.h"
41#include "memalloc.h"
42#include "output.h"
43#include "shell.h"
44#include "var.h"
45#include <stdlib.h>
46#include <sys/stat.h>
47#include <sys/types.h>
48
49#define MAXMBOXES 10
50
51static int nmboxes; /* number of mailboxes */
52static time_t mailtime[MAXMBOXES]; /* times of mailboxes */
53
54/*
55 * Print appropriate message(s) if mail has arrived. If the argument is
56 * non-zero, then the value of MAIL has changed, so we just update the
57 * values.
58 */
59
60void
61chkmail(int silent)
62{
63 int i;
64 char *mpath;
65 char *p;
66 char *msg;
67 struct stackmark smark;
68 struct stat statb;
69
70 if (silent)
71 nmboxes = 10;
72 if (nmboxes == 0)
73 return;
74 setstackmark(&smark);
75 mpath = stsavestr(mpathset() ? mpathval() : mailval());
76 for (i = 0; i < nmboxes; i++) {
77 p = mpath;
78 if (*p == '\0')
79 break;
80 mpath = strchrnul(mpath, ':');
81 if (*mpath != '\0') {
82 *mpath++ = '\0';
83 if (p == mpath - 1)
84 continue;
85 }
86 msg = strchr(p, '%');
87 if (msg != NULL)
88 *msg++ = '\0';
89#ifdef notdef /* this is what the System V shell claims to do (it lies) */
90 if (stat(p, &statb) < 0)
91 statb.st_mtime = 0;
92 if (statb.st_mtime > mailtime[i] && !silent) {
93 out2str(msg ? msg : "you have mail");
94 out2c('\n');
95 }
96 mailtime[i] = statb.st_mtime;
97#else /* this is what it should do */
98 if (stat(p, &statb) < 0)
99 statb.st_size = 0;
100 if (statb.st_size > mailtime[i] && !silent) {
101 out2str(msg ? msg : "you have mail");
102 out2c('\n');
103 }
104 mailtime[i] = statb.st_size;
105#endif
106 }
107 nmboxes = i;
108 popstackmark(&smark);
109}
