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 "shell.h"
40 #include "mail.h"
41 #include "var.h"
42 #include "output.h"
43 #include "memalloc.h"
44 #include "error.h"
45 #include <sys/types.h>
46 #include <sys/stat.h>
47 #include <stdlib.h>
48
49
50 #define MAXMBOXES 10
51
52
53 static int nmboxes; /* number of mailboxes */
54 static time_t mailtime[MAXMBOXES]; /* times of mailboxes */
55
56
57
58 /*
59 * Print appropriate message(s) if mail has arrived. If the argument is
60 * non-zero, then the value of MAIL has changed, so we just update the
61 * values.
62 */
63
64 void
chkmail(int silent)65 chkmail(int silent)
66 {
67 int i;
68 char *mpath;
69 char *p;
70 char *msg;
71 struct stackmark smark;
72 struct stat statb;
73
74 if (silent)
75 nmboxes = 10;
76 if (nmboxes == 0)
77 return;
78 setstackmark(&smark);
79 mpath = stsavestr(mpathset()? mpathval() : mailval());
80 for (i = 0 ; i < nmboxes ; i++) {
81 p = mpath;
82 if (*p == '\0')
83 break;
84 mpath = strchrnul(mpath, ':');
85 if (*mpath != '\0') {
86 *mpath++ = '\0';
87 if (p == mpath - 1)
88 continue;
89 }
90 msg = strchr(p, '%');
91 if (msg != NULL)
92 *msg++ = '\0';
93 #ifdef notdef /* this is what the System V shell claims to do (it lies) */
94 if (stat(p, &statb) < 0)
95 statb.st_mtime = 0;
96 if (statb.st_mtime > mailtime[i] && ! silent) {
97 out2str(msg? msg : "you have mail");
98 out2c('\n');
99 }
100 mailtime[i] = statb.st_mtime;
101 #else /* this is what it should do */
102 if (stat(p, &statb) < 0)
103 statb.st_size = 0;
104 if (statb.st_size > mailtime[i] && ! silent) {
105 out2str(msg? msg : "you have mail");
106 out2c('\n');
107 }
108 mailtime[i] = statb.st_size;
109 #endif
110 }
111 nmboxes = i;
112 popstackmark(&smark);
113 }
114