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cmd1.c

/*    $OpenBSD: cmd1.c,v 1.27 2008/07/15 19:13:25 martynas Exp $  */
/*    $NetBSD: cmd1.c,v 1.9 1997/07/09 05:29:48 mikel Exp $ */

/*-
 * Copyright (c) 1980, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
#if 0
static const char sccsid[] = "@(#)cmd1.c  8.2 (Berkeley) 4/20/95";
#else
static const char rcsid[] = "$OpenBSD: cmd1.c,v 1.27 2008/07/15 19:13:25 martynas Exp $";
#endif
#endif /* not lint */

#include "rcv.h"
#include "extern.h"

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

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

static int screen;
static volatile sig_atomic_t gothdrint;

int
headers(void *v)
{
      int *msgvec = v;
      int n, mesg, flag, size;
      struct message *mp;
      struct sigaction act, oact;
      sigset_t oset;

      size = screensize();
      n = msgvec[0];
      if (n != 0 && size > 0)
            screen = (n-1)/size;
      if (screen < 0)
            screen = 0;
      mp = &message[screen * size];
      if (mp >= &message[msgCount])
            mp = &message[msgCount - size];
      if (mp < &message[0])
            mp = &message[0];
      flag = 0;
      mesg = mp - &message[0];
      if (dot != &message[n-1])
            dot = mp;
      sigemptyset(&act.sa_mask);
      act.sa_flags = SA_RESTART;
      act.sa_handler = hdrint;
      if (sigaction(SIGINT, NULL, &oact) == 0 &&
          oact.sa_handler != SIG_IGN) {
            (void)sigaction(SIGINT, &act, &oact);
            (void)sigprocmask(SIG_UNBLOCK, &intset, &oset);
      }
      for (gothdrint = 0; !gothdrint && mp < &message[msgCount]; mp++) {
            mesg++;
            if (mp->m_flag & MDELETED)
                  continue;
            if (flag++ >= size)
                  break;
            printhead(mesg);
      }
      if (gothdrint) {
            fflush(stdout);
            fputs("\nInterrupt\n", stderr);
      }
      if (oact.sa_handler != SIG_IGN) {
            (void)sigprocmask(SIG_SETMASK, &oset, NULL);
            (void)sigaction(SIGINT, &oact, NULL);
      }
      if (flag == 0) {
            puts("No more mail.");
            return(1);
      }
      return(0);
}

/*
 * Scroll to the next/previous screen
 */
int
scroll(void *v)
{
      char *arg = v;
      int size, maxscreen;
      int cur[1];

      cur[0] = 0;
      size = screensize();
      maxscreen = 0;
      if (size > 0)
            maxscreen = (msgCount - 1) / size;
      switch (*arg) {
      case 0:
      case '+':
            if (screen >= maxscreen) {
                  puts("On last screenful of messages");
                  return(0);
            }
            screen++;
            break;

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

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

/*
 * Compute screen size.
 */
int
screensize(void)
{
      int s;
      char *cp;

      if ((cp = value("screen")) != NULL && (s = atoi(cp)) > 0)
            return(s);
      return(screenheight - 4);
}

/*
 * Print out the headlines for each message
 * in the passed message list.
 */
int
from(void *v)
{
      int *msgvec = v;
      int *ip;

      for (ip = msgvec; *ip != NULL; ip++)
            printhead(*ip);
      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.
 */
void
printhead(int mesg)
{
      struct message *mp;
      char headline[LINESIZE], *subjline, dispc, curind;
      char visname[LINESIZE], vissub[LINESIZE];
      char pbuf[LINESIZE];
      char fmtline[LINESIZE];
      const char *fmt;
      struct headline hl;
      char *name;
      char *to, *from;
      struct name *np;
      char **ap;

      mp = &message[mesg-1];
      (void)readline(setinput(mp), headline, LINESIZE, NULL);
      if ((subjline = hfield("subject", mp)) == NULL &&
          (subjline = hfield("subj", mp)) == NULL)
            subjline = "";
      /*
       * Bletch!
       */
      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);
      from = nameof(mp, 0);
      to = skin(hfield("to", mp));
      np = extract(from, GTO);
      np = delname(np, myname);
      if (altnames)
            for (ap = altnames; *ap; ap++)
                  np = delname(np, *ap);
      if (np)
            /* not from me */
            name = value("show-rcpt") != NULL && to ? to : from;
      else
            /* from me - show TO */
            name = value("showto") != NULL && to ? to : from;
      strnvis(visname, name, sizeof(visname), VIS_SAFE|VIS_NOSLASH);
      if (name == to)
            fmt = "%c%c%3d TO %-14.14s  %16.16s %4d/%-5d %s";
      else
            fmt = "%c%c%3d %-17.17s  %16.16s %4d/%-5d %s";
      strnvis(vissub, subjline, sizeof(vissub), VIS_SAFE|VIS_NOSLASH);
      /* hl.l_date was sanity-checked when read in.  */
      snprintf(fmtline, sizeof(fmtline), fmt, curind, dispc, mesg, visname,
          hl.l_date, mp->m_lines, mp->m_size, vissub);
      printf("%.*s\n", screenwidth, fmtline);
}

/*
 * Print out the value of dot.
 */
int
pdot(void *v)
{
      printf("%d\n", (int)(dot - &message[0] + 1));
      return(0);
}

/*
 * Print out all the possible commands.
 */
int
pcmdlist(void *v)
{
      extern const struct cmd cmdtab[];
      const struct cmd *cp;
      int cc;

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

/*
 * Pipe message to command
 */
int
pipeit(void *ml, void *sl)
{
      int  *msgvec = ml;
      char *cmd    = sl;

      return(type1(msgvec, cmd, 0, 0));
}

/*
 * Paginate messages, honor ignored fields.
 */
int
more(void *v)
{
      int *msgvec = v;
      return(type1(msgvec, NULL, 1, 1));
}

/*
 * Paginate messages, even printing ignored fields.
 */
int
More(void *v)
{
      int *msgvec = v;

      return(type1(msgvec, NULL, 0, 1));
}

/*
 * Type out messages, honor ignored fields.
 */
int
type(void *v)
{
      int *msgvec = v;

      return(type1(msgvec, NULL, 1, 0));
}

/*
 * Type out messages, even printing ignored fields.
 */
int
Type(void *v)
{
      int *msgvec = v;

      return(type1(msgvec, NULL, 0, 0));
}

/*
 * Type out the messages requested.
 */
int
type1(int *msgvec, char *cmd, int doign, int page)
{
      int nlines, *ip, restoreterm;
      struct message *mp;
      struct termios tbuf;
      char *cp;
      FILE *obuf;

      obuf = stdout;
      restoreterm = 0;

      /*
       * start a pipe if needed.
       */
      if (cmd) {
            restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
            obuf = Popen(cmd, "w");
            if (obuf == NULL) {
                  warn("%s", cmd);
                  obuf = stdout;
            }
      } else if (value("interactive") != NULL &&
               (page || (cp = value("crt")) != NULL)) {
            nlines = 0;
            if (!page) {
                  for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++)
                        nlines += message[*ip - 1].m_lines;
            }
            if (page || nlines > (*cp ? atoi(cp) : realscreenheight)) {
                  restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
                  cp = value("PAGER");
                  obuf = Popen(cp, "w");
                  if (obuf == NULL) {
                        warn("%s", cp);
                        obuf = stdout;
                  }
            }
      }

      /*
       * Send messages to the output.
       */
      for (ip = msgvec; *ip && ip - msgvec < msgCount; ip++) {
            mp = &message[*ip - 1];
            touch(mp);
            dot = mp;
            if (cmd == NULL && value("quiet") == NULL)
                  fprintf(obuf, "Message %d:\n", *ip);
            if (sendmessage(mp, obuf, doign ? ignore : 0, NULL) == -1)
                  break;
      }

      if (obuf != stdout) {
            (void)Pclose(obuf);
            if (restoreterm)
                  (void)tcsetattr(fileno(stdin), TCSADRAIN, &tbuf);
      }
      return(0);
}

/*
 * Print the top so many lines of each desired message.
 * The number of lines is taken from the variable "toplines"
 * and defaults to 5.
 */
int
top(void * v)
{
      int *msgvec = v;
      int *ip;
      struct message *mp;
      int c, topl, lines, lineb;
      char *valtop, linebuf[LINESIZE];
      FILE *ibuf;

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

/*
 * Touch all the given messages so that they will
 * get mboxed.
 */
int
stouch(void *v)
{
      int *msgvec = v;
      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.
 */
int
mboxit(void *v)
{
      int *msgvec = v;
      int *ip;

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

/*
 * List the folders the user currently has.
 */
int
folders(void *v)
{
      char *files = (char *)v;
      char dirname[PATHSIZE];
      char cmd[BUFSIZ];

      if (getfold(dirname, sizeof(dirname)) < 0)
            strlcpy(dirname, "$HOME", sizeof(dirname));

      snprintf(cmd, sizeof(cmd), "cd %s; %s %s", dirname, value("LISTER"),
            files && *files ? files : "");

      (void)run_command(value("SHELL"), 0, -1, -1, "-c", cmd, NULL);
      return(0);
}

/*
 * Update the mail file with any new messages that have
 * come in since we started reading mail.
 */
int
inc(void *v)
{
      int nmsg, mdot;

      nmsg = incfile();

      if (nmsg == 0) {
            puts("No new mail.");
      } else if (nmsg > 0) {
            mdot = newfileinfo(msgCount - nmsg);
            dot = &message[mdot - 1];
      } else {
            puts("\"inc\" command failed...");
      }

      return(0);
}

/*
 * User hit ^C while printing the headers.
 */
void
hdrint(int s)
{

      gothdrint = 1;
}

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