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mail.c revision 1.11 
      1 /*	$NetBSD: mail.c,v 1.11 1997/07/04 21:02:06 christos Exp $	*/
      2 
      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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #ifndef lint
     41 #if 0
     42 static char sccsid[] = "@(#)mail.c	8.2 (Berkeley) 5/4/95";
     43 #else
     44 __RCSID("$NetBSD: mail.c,v 1.11 1997/07/04 21:02:06 christos Exp $");
     45 #endif
     46 #endif /* not lint */
     47 
     48 /*
     49  * Routines to check for mail.  (Perhaps make part of main.c?)
     50  */
     51 
     52 #include "shell.h"
     53 #include "exec.h"	/* defines padvance() */
     54 #include "var.h"
     55 #include "output.h"
     56 #include "memalloc.h"
     57 #include "error.h"
     58 #include "mail.h"
     59 #include <sys/types.h>
     60 #include <sys/stat.h>
     61 
     62 
     63 #define MAXMBOXES 10
     64 
     65 
     66 STATIC int nmboxes;			/* number of mailboxes */
     67 STATIC time_t mailtime[MAXMBOXES];	/* times of mailboxes */
     68 
     69 
     70 
     71 /*
     72  * Print appropriate message(s) if mail has arrived.  If the argument is
     73  * nozero, then the value of MAIL has changed, so we just update the
     74  * values.
     75  */
     76 
     77 void
     78 chkmail(silent)
     79 	int silent;
     80 {
     81 	int i;
     82 	char *mpath;
     83 	char *p;
     84 	char *q;
     85 	struct stackmark smark;
     86 	struct stat statb;
     87 
     88 	if (silent)
     89 		nmboxes = 10;
     90 	if (nmboxes == 0)
     91 		return;
     92 	setstackmark(&smark);
     93 	mpath = mpathset()? mpathval() : mailval();
     94 	for (i = 0 ; i < nmboxes ; i++) {
     95 		p = padvance(&mpath, nullstr);
     96 		if (p == NULL)
     97 			break;
     98 		if (*p == '\0')
     99 			continue;
    100 		for (q = p ; *q ; q++);
    101 		if (q[-1] != '/')
    102 			abort();
    103 		q[-1] = '\0';			/* delete trailing '/' */
    104 #ifdef notdef /* this is what the System V shell claims to do (it lies) */
    105 		if (stat(p, &statb) < 0)
    106 			statb.st_mtime = 0;
    107 		if (statb.st_mtime > mailtime[i] && ! silent) {
    108 			out2str(pathopt? pathopt : "you have mail");
    109 			out2c('\n');
    110 		}
    111 		mailtime[i] = statb.st_mtime;
    112 #else /* this is what it should do */
    113 		if (stat(p, &statb) < 0)
    114 			statb.st_size = 0;
    115 		if (statb.st_size > mailtime[i] && ! silent) {
    116 			out2str(pathopt? pathopt : "you have mail");
    117 			out2c('\n');
    118 		}
    119 		mailtime[i] = statb.st_size;
    120 #endif
    121 	}
    122 	nmboxes = i;
    123 	popstackmark(&smark);
    124 }
    125