NetBSD/bin/sh/mail.c

145 lines
3.9 KiB
C

/* $NetBSD: mail.c,v 1.18 2017/06/04 20:28:13 kre Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)mail.c 8.2 (Berkeley) 5/4/95";
#else
__RCSID("$NetBSD: mail.c,v 1.18 2017/06/04 20:28:13 kre Exp $");
#endif
#endif /* not lint */
/*
* Routines to check for mail. (Perhaps make part of main.c?)
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include "shell.h"
#include "exec.h" /* defines padvance() */
#include "var.h"
#include "output.h"
#include "memalloc.h"
#include "error.h"
#include "mail.h"
#define MAXMBOXES 10
STATIC int nmboxes; /* number of mailboxes */
STATIC off_t mailsize[MAXMBOXES]; /* sizes of mailboxes */
/*
* Print appropriate message(s) if mail has arrived. If the argument is
* nozero, then the value of MAIL has changed, so we just update the
* values.
*/
void
chkmail(int silent)
{
int i;
const char *mpath;
char *p;
char *q;
struct stackmark smark;
struct stat statb;
if (silent)
nmboxes = 10;
if (nmboxes == 0)
return;
setstackmark(&smark);
mpath = mpathset() ? mpathval() : mailval();
for (i = 0 ; i < nmboxes ; i++) {
p = padvance(&mpath, nullstr, 1);
if (p == NULL)
break;
stunalloc(p);
if (*p == '\0')
continue;
for (q = p ; *q ; q++)
;
if (q[-1] != '/')
abort();
q[-1] = '\0'; /* delete trailing '/' */
#ifdef notdef /* this is what the System V shell claims to do (it lies) */
if (stat(p, &statb) < 0)
statb.st_mtime = 0;
if (statb.st_mtime > mailtime[i] && ! silent) {
out2str(pathopt ? pathopt : "you have mail");
out2c('\n');
}
mailtime[i] = statb.st_mtime;
#else /* this is what it should do */
if (stat(p, &statb) < 0)
statb.st_size = 0;
if (statb.st_size > mailsize[i] && ! silent) {
const char *pp;
if ((pp = pathopt) != NULL) {
int len = 0;
while (*pp && *pp != ':')
len++, pp++;
if (len == 0) {
CHECKSTRSPACE(16, p);
strcat(p, ": file changed");
} else {
while (stackblocksize() <= len)
growstackblock();
p = stackblock();
memcpy(p, pathopt, len);
p[len] = '\0';
}
pp = p;
} else
pp = "you have mail";
out2str(pp);
out2c('\n');
}
mailsize[i] = statb.st_size;
#endif
}
nmboxes = i;
popstackmark(&smark);
}