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
 53static int nmboxes;			/* number of mailboxes */
 54static 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
 64void
 65chkmail(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}