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mail.c revision 1.8 
      1 /*	$NetBSD: mail.c,v 1.8 1995/03/21 09:09:22 cgd 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 #ifndef lint
     40 #if 0
     41 static char sccsid[] = "@(#)mail.c	8.1 (Berkeley) 5/31/93";
     42 #else
     43 static char rcsid[] = "$NetBSD: mail.c,v 1.8 1995/03/21 09:09:22 cgd Exp $";
     44 #endif
     45 #endif /* not lint */
     46 
     47 /*
     48  * Routines to check for mail.  (Perhaps make part of main.c?)
     49  */
     50 
     51 #include "shell.h"
     52 #include "exec.h"	/* defines padvance() */
     53 #include "var.h"
     54 #include "output.h"
     55 #include "memalloc.h"
     56 #include "error.h"
     57 #include <sys/types.h>
     58 #include <sys/stat.h>
     59 
     60 
     61 #define MAXMBOXES 10
     62 
     63 
     64 STATIC int nmboxes;			/* number of mailboxes */
     65 STATIC time_t mailtime[MAXMBOXES];	/* times of mailboxes */
     66 
     67 
     68 
     69 /*
     70  * Print appropriate message(s) if mail has arrived.  If the argument is
     71  * nozero, then the value of MAIL has changed, so we just update the
     72  * values.
     73  */
     74 
     75 void
     76 chkmail(silent)
     77 	int silent;
     78 {
     79 	register int i;
     80 	char *mpath;
     81 	char *p;
     82 	register char *q;
     83 	struct stackmark smark;
     84 	struct stat statb;
     85 
     86 	if (silent)
     87 		nmboxes = 10;
     88 	if (nmboxes == 0)
     89 		return;
     90 	setstackmark(&smark);
     91 	mpath = mpathset()? mpathval() : mailval();
     92 	for (i = 0 ; i < nmboxes ; i++) {
     93 		p = padvance(&mpath, nullstr);
     94 		if (p == NULL)
     95 			break;
     96 		if (*p == '\0')
     97 			continue;
     98 		for (q = p ; *q ; q++);
     99 		if (q[-1] != '/')
    100 			abort();
    101 		q[-1] = '\0';			/* delete trailing '/' */
    102 #ifdef notdef /* this is what the System V shell claims to do (it lies) */
    103 		if (stat(p, &statb) < 0)
    104 			statb.st_mtime = 0;
    105 		if (statb.st_mtime > mailtime[i] && ! silent) {
    106 			out2str(pathopt? pathopt : "you have mail");
    107 			out2c('\n');
    108 		}
    109 		mailtime[i] = statb.st_mtime;
    110 #else /* this is what it should do */
    111 		if (stat(p, &statb) < 0)
    112 			statb.st_size = 0;
    113 		if (statb.st_size > mailtime[i] && ! silent) {
    114 			out2str(pathopt? pathopt : "you have mail");
    115 			out2c('\n');
    116 		}
    117 		mailtime[i] = statb.st_size;
    118 #endif
    119 	}
    120 	nmboxes = i;
    121 	popstackmark(&smark);
    122 }
    123