usr.bin/mail/cmd1.c

   1 /*-
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)cmd1.c   8.2 (Berkeley) 4/20/95
  34  * $FreeBSD: src/usr.bin/mail/cmd1.c,v 1.3.6.3 2003/01/06 05:46:03 mikeh Exp $
  35  * $DragonFly: src/usr.bin/mail/cmd1.c,v 1.4 2004/09/08 03:01:11 joerg Exp $
  36  */
  37
  38 #include "rcv.h"
  39 #include "extern.h"
  40
  41 /*
  42  * Mail -- a mail program
  43  *
  44  * User commands.
  45  */
  46
  47 extern const struct cmd cmdtab[];
  48
  49 /*
  50  * Print the current active headings.
  51  * Don't change dot if invoker didn't give an argument.
  52  */
  53
  54 static int screen;
  55
  56 int
  57 headers(int *msgvec)
  58 {
  59         int n, mesg, flag, size;
  60         struct message *mp;
  61
  62         size = screensize();
  63         n = msgvec[0];
  64         if (n != 0)
  65                 screen = (n-1)/size;
  66         if (screen < 0)
  67                 screen = 0;
  68         mp = &message[screen * size];
  69         if (mp >= &message[msgCount])
  70                 mp = &message[msgCount - size];
  71         if (mp < &message[0])
  72                 mp = &message[0];
  73         flag = 0;
  74         mesg = mp - &message[0];
  75         if (dot != &message[n-1])
  76                 dot = mp;
  77         for (; mp < &message[msgCount]; mp++) {
  78                 mesg++;
  79                 if (mp->m_flag & MDELETED)
  80                         continue;
  81                 if (flag++ >= size)
  82                         break;
  83                 printhead(mesg);
  84         }
  85         if (flag == 0) {
  86                 printf("No more mail.\n");
  87                 return (1);
  88         }
  89         return (0);
  90 }
  91
  92 /*
  93  * Scroll to the next/previous screen
  94  */
  95 int
  96 scroll(char *arg)
  97 {
  98         int s, size;
  99         int cur[1];
 100
 101         cur[0] = 0;
 102         size = screensize();
 103         s = screen;
 104         switch (*arg) {
 105         case 0:
 106         case '+':
 107                 s++;
 108                 if (s * size >= msgCount) {
 109                         printf("On last screenful of messages\n");
 110                         return (0);
 111                 }
 112                 screen = s;
 113                 break;
 114
 115         case '-':
 116                 if (--s < 0) {
 117                         printf("On first screenful of messages\n");
 118                         return (0);
 119                 }
 120                 screen = s;
 121                 break;
 122
 123         default:
 124                 printf("Unrecognized scrolling command \"%s\"\n", arg);
 125                 return (1);
 126         }
 127         return (headers(cur));
 128 }
 129
 130 /*
 131  * Compute screen size.
 132  */
 133 int
 134 screensize(void)
 135 {
 136         int s;
 137         char *cp;
 138
 139         if ((cp = value("screen")) != NULL && (s = atoi(cp)) > 0)
 140                 return (s);
 141         return (screenheight - 4);
 142 }
 143
 144 /*
 145  * Print out the headlines for each message
 146  * in the passed message list.
 147  */
 148 int
 149 from(int *msgvec)
 150 {
 151         int *ip;
 152
 153         for (ip = msgvec; *ip != 0; ip++)
 154                 printhead(*ip);
 155         if (--ip >= msgvec)
 156                 dot = &message[*ip - 1];
 157         return (0);
 158 }
 159
 160 /*
 161  * Print out the header of a specific message.
 162  * This is a slight improvement to the standard one.
 163  */
 164 void
 165 printhead(int mesg)
 166 {
 167         struct message *mp;
 168         char headline[LINESIZE], wcount[LINESIZE], *subjline, dispc, curind;
 169         char pbuf[BUFSIZ];
 170         struct headline hl;
 171         int subjlen;
 172         char *name;
 173
 174         mp = &message[mesg-1];
 175         readline(setinput(mp), headline, LINESIZE);
 176         if ((subjline = hfield("subject", mp)) == NULL)
 177                 subjline = hfield("subj", mp);
 178         /*
 179          * Bletch!
 180          */
 181         curind = dot == mp ? '>' : ' ';
 182         dispc = ' ';
 183         if (mp->m_flag & MSAVED)
 184                 dispc = '*';
 185         if (mp->m_flag & MPRESERVE)
 186                 dispc = 'P';
 187         if ((mp->m_flag & (MREAD|MNEW)) == MNEW)
 188                 dispc = 'N';
 189         if ((mp->m_flag & (MREAD|MNEW)) == 0)
 190                 dispc = 'U';
 191         if (mp->m_flag & MBOX)
 192                 dispc = 'M';
 193         parse(headline, &hl, pbuf);
 194         sprintf(wcount, "%3ld/%-5ld", mp->m_lines, mp->m_size);
 195         subjlen = screenwidth - 50 - strlen(wcount);
 196         name = value("show-rcpt") != NULL ?
 197                 skin(hfield("to", mp)) : nameof(mp, 0);
 198         if (subjline == NULL || subjlen < 0)            /* pretty pathetic */
 199                 printf("%c%c%3d %-20.20s  %16.16s %s\n",
 200                         curind, dispc, mesg, name, hl.l_date, wcount);
 201         else
 202                 printf("%c%c%3d %-20.20s  %16.16s %s \"%.*s\"\n",
 203                         curind, dispc, mesg, name, hl.l_date, wcount,
 204                         subjlen, subjline);
 205 }
 206
 207 /*
 208  * Print out the value of dot.
 209  */
 210 int
 211 pdot(void)
 212 {
 213         printf("%d\n", dot - &message[0] + 1);
 214         return (0);
 215 }
 216
 217 /*
 218  * Print out all the possible commands.
 219  */
 220 int
 221 pcmdlist(void)
 222 {
 223         const struct cmd *cp;
 224         int cc;
 225
 226         printf("Commands are:\n");
 227         for (cc = 0, cp = cmdtab; cp->c_name != NULL; cp++) {
 228                 cc += strlen(cp->c_name) + 2;
 229                 if (cc > 72) {
 230                         printf("\n");
 231                         cc = strlen(cp->c_name) + 2;
 232                 }
 233                 if ((cp+1)->c_name != NULL)
 234                         printf("%s, ", cp->c_name);
 235                 else
 236                         printf("%s\n", cp->c_name);
 237         }
 238         return (0);
 239 }
 240
 241 /*
 242  * Paginate messages, honor ignored fields.
 243  */
 244 int
 245 more(int *msgvec)
 246 {
 247         return (type1(msgvec, 1, 1));
 248 }
 249
 250 /*
 251  * Paginate messages, even printing ignored fields.
 252  */
 253 int
 254 More(int *msgvec)
 255 {
 256         return (type1(msgvec, 0, 1));
 257 }
 258
 259 /*
 260  * Type out messages, honor ignored fields.
 261  */
 262 int
 263 type(int *msgvec)
 264 {
 265         return (type1(msgvec, 1, 0));
 266 }
 267
 268 /*
 269  * Type out messages, even printing ignored fields.
 270  */
 271 int
 272 Type(int *msgvec)
 273 {
 274         return (type1(msgvec, 0, 0));
 275 }
 276
 277 /*
 278  * Type out the messages requested.
 279  */
 280 jmp_buf pipestop;
 281 int
 282 type1(int *msgvec, int doign, int page)
 283 {
 284         int nlines, *ip;
 285         struct message *mp;
 286         char *cp;
 287         FILE *obuf;
 288
 289         obuf = stdout;
 290         if (setjmp(pipestop))
 291                 goto close_pipe;
 292         if (value("interactive") != NULL &&
 293             (page || (cp = value("crt")) != NULL)) {
 294                 nlines = 0;
 295                 if (!page) {
 296                         for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++)
 297                                 nlines += message[*ip - 1].m_lines;
 298                 }
 299                 if (page || nlines > (*cp ? atoi(cp) : realscreenheight)) {
 300                         cp = value("PAGER");
 301                         if (cp == NULL || *cp == '\0')
 302                                 cp = _PATH_MORE;
 303                         obuf = Popen(cp, "w");
 304                         if (obuf == NULL) {
 305                                 warnx("%s", cp);
 306                                 obuf = stdout;
 307                         } else
 308                                 signal(SIGPIPE, brokpipe);
 309                 }
 310         }
 311
 312         /*
 313          * Send messages to the output.
 314          *
 315          */
 316         for (ip = msgvec; *ip && ip - msgvec < msgCount; ip++) {
 317                 mp = &message[*ip - 1];
 318                 touch(mp);
 319                 dot = mp;
 320                 if (value("quiet") == NULL)
 321                         fprintf(obuf, "Message %d:\n", *ip);
 322                 sendmessage(mp, obuf, doign ? ignore : 0, NULL);
 323         }
 324
 325 close_pipe:
 326         if (obuf != stdout) {
 327                 /*
 328                  * Ignore SIGPIPE so it can't cause a duplicate close.
 329                  */
 330                 signal(SIGPIPE, SIG_IGN);
 331                 Pclose(obuf);
 332                 signal(SIGPIPE, SIG_DFL);
 333         }
 334         return (0);
 335 }
 336
 337 /*
 338  * Respond to a broken pipe signal --
 339  * probably caused by quitting more.
 340  */
 341 /*ARGSUSED*/
 342 void
 343 brokpipe(int signo)
 344 {
 345         longjmp(pipestop, 1);
 346 }
 347
 348 /*
 349  * Print the top so many lines of each desired message.
 350  * The number of lines is taken from the variable "toplines"
 351  * and defaults to 5.
 352  */
 353 int
 354 top(int *msgvec)
 355 {
 356         int *ip;
 357         struct message *mp;
 358         int c, topl, lines, lineb;
 359         char *valtop, linebuf[LINESIZE];
 360         FILE *ibuf;
 361
 362         topl = 5;
 363         valtop = value("toplines");
 364         if (valtop != NULL) {
 365                 topl = atoi(valtop);
 366                 if (topl < 0 || topl > 10000)
 367                         topl = 5;
 368         }
 369         lineb = 1;
 370         for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
 371                 mp = &message[*ip - 1];
 372                 touch(mp);
 373                 dot = mp;
 374                 if (value("quiet") == NULL)
 375                         printf("Message %d:\n", *ip);
 376                 ibuf = setinput(mp);
 377                 c = mp->m_lines;
 378                 if (!lineb)
 379                         printf("\n");
 380                 for (lines = 0; lines < c && lines <= topl; lines++) {
 381                         if (readline(ibuf, linebuf, sizeof(linebuf)) < 0)
 382                                 break;
 383                         puts(linebuf);
 384                         lineb = strspn(linebuf, " \t") == strlen(linebuf);
 385                 }
 386         }
 387         return (0);
 388 }
 389
 390 /*
 391  * Touch all the given messages so that they will
 392  * get mboxed.
 393  */
 394 int
 395 stouch(int *msgvec)
 396 {
 397         int *ip;
 398
 399         for (ip = msgvec; *ip != 0; ip++) {
 400                 dot = &message[*ip-1];
 401                 dot->m_flag |= MTOUCH;
 402                 dot->m_flag &= ~MPRESERVE;
 403         }
 404         return (0);
 405 }
 406
 407 /*
 408  * Make sure all passed messages get mboxed.
 409  */
 410 int
 411 mboxit(int *msgvec)
 412 {
 413         int *ip;
 414
 415         for (ip = msgvec; *ip != 0; ip++) {
 416                 dot = &message[*ip-1];
 417                 dot->m_flag |= MTOUCH|MBOX;
 418                 dot->m_flag &= ~MPRESERVE;
 419         }
 420         return (0);
 421 }
 422
 423 /*
 424  * List the folders the user currently has.
 425  */
 426 int
 427 folders(void)
 428 {
 429         char dirname[PATHSIZE];
 430         char *cmd;
 431
 432         if (getfold(dirname, sizeof(dirname)) < 0) {
 433                 printf("No value set for \"folder\"\n");
 434                 return (1);
 435         }
 436         if ((cmd = value("LISTER")) == NULL)
 437                 cmd = "ls";
 438         run_command(cmd, 0, -1, -1, dirname, NULL, NULL);
 439         return (0);
 440 }
 441
 442 /*
 443  * Update the mail file with any new messages that have
 444  * come in since we started reading mail.
 445  */
 446 int
 447 inc(void *v)
 448 {
 449         int nmsg, mdot;
 450
 451         nmsg = incfile();
 452
 453         if (nmsg == 0)
 454                 printf("No new mail.\n");
 455         else if (nmsg > 0) {
 456                 mdot = newfileinfo(msgCount - nmsg);
 457                 dot = &message[mdot - 1];
 458         } else
 459                 printf("\"inc\" command failed...\n");
 460
 461         return (0);
 462 }