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mail.c revision 1.1 
      1 /*-
      2  * Copyright (c) 1991 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Kenneth Almquist.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #ifndef lint
     38 static char sccsid[] = "@(#)mail.c	5.1 (Berkeley) 3/7/91";
     39 #endif /* not lint */
     40 
     41 /*
     42  * Routines to check for mail.  (Perhaps make part of main.c?)
     43  */
     44 
     45 #include "shell.h"
     46 #include "exec.h"	/* defines padvance() */
     47 #include "var.h"
     48 #include "output.h"
     49 #include "memalloc.h"
     50 #include "error.h"
     51 #include <sys/types.h>
     52 #include <sys/stat.h>
     53 
     54 
     55 #define MAXMBOXES 10
     56 
     57 
     58 STATIC int nmboxes;			/* number of mailboxes */
     59 STATIC time_t mailtime[MAXMBOXES];	/* times of mailboxes */
     60 
     61 
     62 
     63 /*
     64  * Print appropriate message(s) if mail has arrived.  If the argument is
     65  * nozero, then the value of MAIL has changed, so we just update the
     66  * values.
     67  */
     68 
     69 void
     70 chkmail(silent) {
     71 	register int i;
     72 	char *mpath;
     73 	char *p;
     74 	register char *q;
     75 	struct stackmark smark;
     76 	struct stat statb;
     77 
     78 	if (silent)
     79 		nmboxes = 10;
     80 	if (nmboxes == 0)
     81 		return;
     82 	setstackmark(&smark);
     83 	mpath = mpathset()? mpathval() : mailval();
     84 	for (i = 0 ; i < nmboxes ; i++) {
     85 		p = padvance(&mpath, nullstr);
     86 		if (p == NULL)
     87 			break;
     88 		if (*p == '\0')
     89 			continue;
     90 		for (q = p ; *q ; q++);
     91 		if (q[-1] != '/')
     92 			abort();
     93 		q[-1] = '\0';			/* delete trailing '/' */
     94 #ifdef notdef /* this is what the System V shell claims to do (it lies) */
     95 		if (stat(p, &statb) < 0)
     96 			statb.st_mtime = 0;
     97 		if (statb.st_mtime > mailtime[i] && ! silent) {
     98 			out2str(pathopt? pathopt : "you have mail");
     99 			out2c('\n');
    100 		}
    101 		mailtime[i] = statb.st_mtime;
    102 #else /* this is what it should do */
    103 		if (stat(p, &statb) < 0)
    104 			statb.st_size = 0;
    105 		if (statb.st_size > mailtime[i] && ! silent) {
    106 			out2str(pathopt? pathopt : "you have mail");
    107 			out2c('\n');
    108 		}
    109 		mailtime[i] = statb.st_size;
    110 #endif
    111 	}
    112 	nmboxes = i;
    113 	popstackmark(&smark);
    114 }
    115