usr/src/usr.bin/mail/cmd1.c

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

/*
 * Mail -- a mail program
 *
 * User commands.
 */

static char *SccsId = "@(#)cmd1.c       2.1 %G%";

/*
 * Print the current active headings.
 * Don't change dot if invoker didn't give an argument.
 */

static int screen;

headers(msgvec)
        int *msgvec;
{
        register int n, mesg, flag;
        register struct message *mp;

        n = msgvec[0];
        if (n != 0)
                screen = (n-1)/SCREEN;
        if (screen < 0)
                screen = 0;
        mp = &message[screen * SCREEN];
        if (mp >= &message[msgCount])
                mp = &message[msgCount - SCREEN];
        if (mp < &message[0])
                mp = &message[0];
        flag = 0;
        mesg = mp - &message[0];
        if (dot != &message[n-1])
                dot = mp;
        for (; mp < &message[msgCount]; mp++) {
                mesg++;
                if (mp->m_flag & MDELETED)
                        continue;
                if (flag++ >= SCREEN)
                        break;
                printhead(mesg);
                sreset();
        }
        if (flag == 0) {
                printf("No more mail.\n");
                return(1);
        }
        return(0);
}

/*
 * Scroll to the next/previous screen
 */

scroll(arg)
        char arg[];
{
        register int s;
        int cur[1];

        cur[0] = 0;
        s = screen;
        switch (*arg) {
        case 0:
        case '+':
                s++;
                if (s*SCREEN > msgCount) {
                        printf("On last screenful of messages\n");
                        return(0);
                }
                screen = s;
                break;

        case '-':
                if (--s < 0) {
                        printf("On first screenful of messages\n");
                        return(0);
                }
                screen = s;
                break;

        default:
                printf("Unrecognized scrolling command \"%s\"\n", arg);
                return(1);
        }
        return(headers(cur));
}


/*
 * Print out the headlines for each message
 * in the passed message list.
 */

from(msgvec)
        int *msgvec;
{
        register int *ip;

        for (ip = msgvec; *ip != NULL; ip++) {
                printhead(*ip);
                sreset();
        }
        if (--ip >= msgvec)
                dot = &message[*ip - 1];
        return(0);
}

/*
 * Print out the header of a specific message.
 * This is a slight improvement to the standard one.
 */

printhead(mesg)
{
        struct message *mp;
        FILE *ibuf;
        char headline[LINESIZE], wcount[10], *subjline, dispc, curind;
        char pbuf[BUFSIZ];
        int s;
        struct headline hl;
        register char *cp;

        mp = &message[mesg-1];
        ibuf = setinput(mp);
        readline(ibuf, headline);
        subjline = hfield("subject", mp);
        if (subjline == NOSTR)
                subjline = hfield("subj", mp);

        /*
         * Bletch!
         */

        if (subjline != NOSTR && strlen(subjline) > 28)
                subjline[29] = '\0';
        curind = dot == mp ? '>' : ' ';
        dispc = ' ';
        if (mp->m_flag & MSAVED)
                dispc = '*';
        if (mp->m_flag & MPRESERVE)
                dispc = 'P';
        if ((mp->m_flag & (MREAD|MNEW)) == MNEW)
                dispc = 'N';
        if ((mp->m_flag & (MREAD|MNEW)) == 0)
                dispc = 'U';
        if (mp->m_flag & MBOX)
                dispc = 'M';
        parse(headline, &hl, pbuf);
        sprintf(wcount, " %d/%d", mp->m_lines, mp->m_size);
        s = strlen(wcount);
        cp = wcount + s;
        while (s < 7)
                s++, *cp++ = ' ';
        *cp = '\0';
        if (subjline != NOSTR)
                printf("%c%c%3d %-8s %16.16s %s \"%s\"\n", curind, dispc, mesg,
                    nameof(mp, 0), hl.l_date, wcount, subjline);
        else
                printf("%c%c%3d %-8s %16.16s %s\n", curind, dispc, mesg,
                    nameof(mp, 0), hl.l_date, wcount);
}

/*
 * Print out the value of dot.
 */

pdot()
{
        printf("%d\n", dot - &message[0] + 1);
        return(0);
}

/*
 * Print out all the possible commands.
 */

pcmdlist()
{
        register struct cmd *cp;
        register int cc;
        extern struct cmd cmdtab[];

        printf("Commands are:\n");
        for (cc = 0, cp = cmdtab; cp->c_name != NULL; cp++) {
                cc += strlen(cp->c_name) + 2;
                if (cc > 72) {
                        printf("\n");
                        cc = strlen(cp->c_name) + 2;
                }
                if ((cp+1)->c_name != NOSTR)
                        printf("%s, ", cp->c_name);
                else
                        printf("%s\n", cp->c_name);
        }
        return(0);
}

/*
 * Type out the messages requested.
 */

jmp_buf pipestop;

type(msgvec)
        int *msgvec;
{
        register *ip;
        register struct message *mp;
        register int mesg;
        register char *cp;
        int c, nlines;
        int brokpipe();
        FILE *ibuf, *obuf;

        obuf = stdout;
        if (setjmp(pipestop)) {
                if (obuf != stdout) {
                        pclose(obuf);
                        pipef = NULL;
                }
                sigset(SIGPIPE, SIG_DFL);
                return(0);
        }
        if (intty && outtty && (cp = value("crt")) != NOSTR) {
                for (ip = msgvec, nlines = 0; *ip && ip-msgvec < msgCount; ip++)
                        nlines += message[*ip - 1].m_lines;
                if (nlines > atoi(cp)) {
                        obuf = popen(MORE, "w");
                        if (obuf == NULL) {
                                perror(MORE);
                                obuf = stdout;
                        }
                        else {
                                pipef = obuf;
                                sigset(SIGPIPE, brokpipe);
                        }
                }
        }
        for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
                mesg = *ip;
                touch(mesg);
                mp = &message[mesg-1];
                dot = mp;
                print(mp, obuf);
        }
        if (obuf != stdout) {
                pclose(obuf);
                pipef = NULL;
        }
        sigset(SIGPIPE, SIG_DFL);
        return(0);
}

/*
 * Respond to a broken pipe signal --
 * probably caused by using quitting more.
 */

brokpipe()
{

        longjmp(pipestop, 1);
        sigrelse(SIGPIPE);
}

/*
 * Print the indicated message on standard output.
 */

print(mp, obuf)
        register struct message *mp;
        FILE *obuf;
{

        if (value("quiet") == NOSTR)
                fprintf(obuf, "Message %2d:\n", mp - &message[0] + 1);
        touch(mp - &message[0] + 1);
        send(mp, obuf);
}

/*
 * Print the top so many lines of each desired message.
 * The number of lines is taken from the variable "toplines"
 * and defaults to 5.
 */

top(msgvec)
        int *msgvec;
{
        register int *ip;
        register struct message *mp;
        register int mesg;
        int c, topl, lines, lineb;
        char *valtop, linebuf[LINESIZE];
        FILE *ibuf;

        topl = 5;
        valtop = value("toplines");
        if (valtop != NOSTR) {
                topl = atoi(valtop);
                if (topl < 0 || topl > 10000)
                        topl = 5;
        }
        lineb = 1;
        for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
                mesg = *ip;
                touch(mesg);
                mp = &message[mesg-1];
                dot = mp;
                if (value("quiet") == NOSTR)
                        printf("Message %2d:\n", mesg);
                ibuf = setinput(mp);
                c = mp->m_lines;
                if (!lineb)
                        printf("\n");
                for (lines = 0; lines < c && lines <= topl; lines++) {
                        if (readline(ibuf, linebuf) <= 0)
                                break;
                        puts(linebuf);
                        lineb = blankline(linebuf);
                }
        }
        return(0);
}

/*
 * Touch all the given messages so that they will
 * get mboxed.
 */

stouch(msgvec)
        int msgvec[];
{
        register int *ip;

        for (ip = msgvec; *ip != 0; ip++) {
                dot = &message[*ip-1];
                dot->m_flag |= MTOUCH;
                dot->m_flag &= ~MPRESERVE;
        }
        return(0);
}

/*
 * Make sure all passed messages get mboxed.
 */

mboxit(msgvec)
        int msgvec[];
{
        register int *ip;

        for (ip = msgvec; *ip != 0; ip++) {
                dot = &message[*ip-1];
                dot->m_flag |= MTOUCH|MBOX;
                dot->m_flag &= ~MPRESERVE;
        }
        return(0);
}