usr/src/usr.bin/mail/main.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)main.c      5.17 (Berkeley) %G%";
#endif /* not lint */

#include "rcv.h"
#include <sys/stat.h>

/*
 * Mail -- a mail program
 *
 * Startup -- interface with user.
 */

jmp_buf hdrjmp;

main(argc, argv)
        char **argv;
{
        register int i;
        struct name *to, *cc, *bcc, *smopts;
        char *subject;
        char *ef;
        char nosrc = 0;
        int hdrstop(), (*prevint)();
        extern int getopt(), optind, opterr;
        extern char *optarg;

        /*
         * Set up a reasonable environment.
         * Figure out whether we are being run interactively, set up
         * all the temporary files, buffer standard output, and so forth.
         */
        if (isatty(0))
                assign("interactive", "");
        image = -1;
        /*
         * Now, determine how we are being used.
         * We successively pick off - flags.
         * If there is anything left, it is the base of the list
         * of users to mail to.  Argp will be set to point to the
         * first of these users.
         */
        ef = NOSTR;
        to = NIL;
        cc = NIL;
        bcc = NIL;
        smopts = NIL;
        subject = NOSTR;
        while ((i = getopt(argc, argv, "INT:b:c:dfins:u:v")) != EOF) {
                switch (i) {
                case 'T':
                        /*
                         * Next argument is temp file to write which
                         * articles have been read/deleted for netnews.
                         */
                        Tflag = optarg;
                        if ((i = creat(Tflag, 0600)) < 0) {
                                perror(Tflag);
                                exit(1);
                        }
                        close(i);
                        break;
                case 'u':
                        /*
                         * Next argument is person to pretend to be.
                         */
                        myname = optarg;
                        break;
                case 'i':
                        /*
                         * User wants to ignore interrupts.
                         * Set the variable "ignore"
                         */
                        assign("ignore", "");
                        break;
                case 'd':
                        debug++;
                        break;
                case 's':
                        /*
                         * Give a subject field for sending from
                         * non terminal
                         */
                        subject = optarg;
                        break;
                case 'f':
                        /*
                         * User is specifying file to "edit" with Mail,
                         * as opposed to reading system mailbox.
                         * If no argument is given after -f, we read his
                         * mbox file.
                         *
                         * getopt() can't handle optional arguments, so here
                         * is an ugly hack to get around it.
                         */
                        if ((argv[optind]) && (argv[optind][0] != '-'))
                                ef = argv[optind++];
                        else
                                ef = "&";
                        break;
                case 'n':
                        /*
                         * User doesn't want to source /usr/lib/Mail.rc
                         */
                        nosrc++;
                        break;
                case 'N':
                        /*
                         * Avoid initial header printing.
                         */
                        assign("noheader", "");
                        break;
                case 'v':
                        /*
                         * Send mailer verbose flag
                         */
                        assign("verbose", "");
                        break;
                case 'I':
                        /*
                         * We're interactive
                         */
                        assign("interactive", "");
                        break;
                case 'c':
                        /*
                         * Get Carbon Copy Recipient list
                         */
                        cc = cat(cc, nalloc(optarg, GCC));
                        break;
                case 'b':
                        /*
                         * Get Blind Carbon Copy Recipient list
                         */
                        bcc = cat(bcc, nalloc(optarg, GBCC));
                        break;
                case '?':
                        fputs("\
Usage: mail [-iInv] [-s subject] [-c cc-addr] [-b bcc-addr] to-addr ...\n\
            [- sendmail-options ...]\n\
       mail [-iInNv] -f [name]\n\
       mail [-iInNv] [-u user]\n",
                                stderr);
                        exit(1);
                }
        }
        for (i = optind; (argv[i]) && (*argv[i] != '-'); i++)
                to = cat(to, nalloc(argv[i], GTO));
        for (; argv[i]; i++)
                smopts = cat(smopts, nalloc(argv[i], 0));
        /*
         * Check for inconsistent arguments.
         */
        if (to == NIL && (subject != NOSTR || cc != NIL || bcc != NIL)) {
                fputs("You must specify direct recipients with -s, -c, or -b.\n", stderr);
                exit(1);
        }
        if (ef != NOSTR && to != NIL) {
                fprintf(stderr, "Cannot give -f and people to send to.\n");
                exit(1);
        }
        tinit();
        setscreensize();
        input = stdin;
        rcvmode = !to;
        spreserve();
        if (!nosrc)
                load(MASTER);
        load(mailrc);
        if (!rcvmode) {
                mail(to, cc, bcc, smopts, subject);
                /*
                 * why wait?
                 */
                exit(senderr);
        }
        /*
         * Ok, we are reading mail.
         * Decide whether we are editing a mailbox or reading
         * the system mailbox, and open up the right stuff.
         */
        if (ef != NOSTR)
                edit++;
        else
                ef = "%";
        if ((ef = expand(ef)) == NOSTR)
                exit(1);                /* error already reported */
        if (setfile(ef, edit) < 0) {
                if (edit)
                        perror(ef);
                else
                        fprintf(stderr, "No mail for %s\n", myname);
                exit(1);
        }
        if (setjmp(hdrjmp) == 0) {
                extern char *version;

                if ((prevint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
                        signal(SIGINT, hdrstop);
                if (value("quiet") == NOSTR)
                        printf("Mail version %s.  Type ? for help.\n",
                                version);
                announce();
                fflush(stdout);
                signal(SIGINT, prevint);
        }
        if (!edit && msgCount == 0) {
                printf("No mail\n");
                fflush(stdout);
                exit(0);
        }
        commands();
        if (!edit) {
                signal(SIGHUP, SIG_IGN);
                signal(SIGINT, SIG_IGN);
                signal(SIGQUIT, SIG_IGN);
                quit();
        }
        exit(0);
}

/*
 * Interrupt printing of the headers.
 */
hdrstop()
{

        fflush(stdout);
        fprintf(stderr, "\nInterrupt\n");
        longjmp(hdrjmp, 1);
}

/*
 * Compute what the screen size for printing headers should be.
 * We use the following algorithm for the height:
 *      If baud rate < 1200, use  9
 *      If baud rate = 1200, use 14
 *      If baud rate > 1200, use 24 or ws_row
 * Width is either 80 or ws_col;
 */
setscreensize()
{
        struct sgttyb tbuf;
#ifdef  TIOCGWINSZ
        struct winsize ws;

        if (ioctl(1, TIOCGWINSZ, (char *) &ws) < 0)
#endif
                ws.ws_col = ws.ws_row = 0;
        if (gtty(1, &tbuf) < 0)
                tbuf.sg_ospeed = B9600;
        if (tbuf.sg_ospeed < B1200)
                screenheight = 9;
        else if (tbuf.sg_ospeed == B1200)
                screenheight = 14;
        else if (ws.ws_row != 0)
                screenheight = ws.ws_row;
        else
                screenheight = 24;
        if ((realscreenheight = ws.ws_row) == 0)
                realscreenheight = 24;
        if ((screenwidth = ws.ws_col) == 0)
                screenwidth = 80;
}