usr.bin/mail/main.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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)main.c   8.2 (Berkeley) 4/20/95
  31  * $FreeBSD: src/usr.bin/mail/main.c,v 1.6.2.5 2003/01/06 05:46:03 mikeh Exp $
  32  */
  33
  34 #include "rcv.h"
  35 #include <fcntl.h>
  36 #include "extern.h"
  37
  38 /*
  39  * Mail -- a mail program
  40  *
  41  * Startup -- interface with user.
  42  */
  43
  44 jmp_buf hdrjmp;
  45
  46 extern const char *version;
  47
  48 int
  49 main(int argc, char **argv)
  50 {
  51         int i;
  52         struct name *to, *cc, *bcc, *smopts;
  53         char *subject, *replyto;
  54         char *ef, *rc;
  55         char nosrc = 0;
  56         const char *progname;
  57         sig_t prevint;
  58
  59         /*
  60          * Set up a reasonable environment.
  61          * Figure out whether we are being run interactively,
  62          * start the SIGCHLD catcher, and so forth.
  63          */
  64         signal(SIGCHLD, sigchild);
  65         if (isatty(0))
  66                 assign("interactive", "");
  67         image = -1;
  68         /*
  69          * Now, determine how we are being used.
  70          * We successively pick off - flags.
  71          * If there is anything left, it is the base of the list
  72          * of users to mail to.  Argp will be set to point to the
  73          * first of these users.
  74          */
  75         ef = NULL;
  76         to = NULL;
  77         cc = NULL;
  78         bcc = NULL;
  79         smopts = NULL;
  80         subject = NULL;
  81         while ((i = getopt(argc, argv, "FEHINT:b:c:edfins:u:v")) != -1) {
  82                 switch (i) {
  83                 case 'T':
  84                         /*
  85                          * Next argument is temp file to write which
  86                          * articles have been read/deleted for netnews.
  87                          */
  88                         Tflag = optarg;
  89                         if ((i = open(Tflag, O_CREAT | O_TRUNC | O_WRONLY,
  90                             0600)) < 0)
  91                                 err(1, "%s", Tflag);
  92                         close(i);
  93                         break;
  94                 case 'u':
  95                         /*
  96                          * Next argument is person to pretend to be.
  97                          */
  98                         myname = optarg;
  99                         unsetenv("MAIL");
 100                         break;
 101                 case 'i':
 102                         /*
 103                          * User wants to ignore interrupts.
 104                          * Set the variable "ignore"
 105                          */
 106                         assign("ignore", "");
 107                         break;
 108                 case 'd':
 109                         debug++;
 110                         break;
 111                 case 'e':
 112                         /*
 113                          * User wants to check mail and exit.
 114                          */
 115                         assign("checkmode", "");
 116                         break;
 117                 case 'H':
 118                         /*
 119                          * User wants a header summary only.
 120                          */
 121                         assign("headersummary", "");
 122                         break;
 123                 case 'F':
 124                         /*
 125                          * User wants to record messages to files
 126                          * named after first recipient username.
 127                          */
 128                         assign("recordrecip", "");
 129                         break;
 130                 case 's':
 131                         /*
 132                          * Give a subject field for sending from
 133                          * non terminal
 134                          */
 135                         subject = optarg;
 136                         break;
 137                 case 'f':
 138                         /*
 139                          * User is specifying file to "edit" with Mail,
 140                          * as opposed to reading system mailbox.
 141                          * If no argument is given after -f, we read his
 142                          * mbox file.
 143                          *
 144                          * getopt() can't handle optional arguments, so here
 145                          * is an ugly hack to get around it.
 146                          */
 147                         if ((argv[optind] != NULL) && (argv[optind][0] != '-'))
 148                                 ef = argv[optind++];
 149                         else
 150                                 ef = "&";
 151                         break;
 152                 case 'n':
 153                         /*
 154                          * User doesn't want to source /usr/lib/Mail.rc
 155                          */
 156                         nosrc++;
 157                         break;
 158                 case 'N':
 159                         /*
 160                          * Avoid initial header printing.
 161                          */
 162                         assign("noheader", "");
 163                         break;
 164                 case 'v':
 165                         /*
 166                          * Send mailer verbose flag
 167                          */
 168                         assign("verbose", "");
 169                         break;
 170                 case 'I':
 171                         /*
 172                          * We're interactive
 173                          */
 174                         assign("interactive", "");
 175                         break;
 176                 case 'c':
 177                         /*
 178                          * Get Carbon Copy Recipient list
 179                          */
 180                         cc = cat(cc, nalloc(optarg, GCC));
 181                         break;
 182                 case 'b':
 183                         /*
 184                          * Get Blind Carbon Copy Recipient list
 185                          */
 186                         bcc = cat(bcc, nalloc(optarg, GBCC));
 187                         break;
 188                 case 'E':
 189                         /*
 190                          * Don't send empty files.
 191                          */
 192                         assign("dontsendempty", "");
 193                         break;
 194                 case '?':
 195                         progname = getprogname();
 196                         fprintf(stderr,
 197 "Usage: %s [-EiInv] [-s subject] [-c cc-addr] [-b bcc-addr] [-F] to-addr ...\n"
 198 "       %*s [- sendmail-options ...]\n"
 199 "       %s [-EHiInNv] [-F] -f [name]\n"
 200 "       %s [-EHiInNv] [-F] [-u user]\n"
 201 "       %s -e [-f name]\n"
 202 "       %s -H\n", progname, (int)strlen(progname), "",
 203                             progname, progname, progname, progname);
 204                         exit(1);
 205                 }
 206         }
 207         for (i = optind; (argv[i] != NULL) && (*argv[i] != '-'); i++)
 208                 to = cat(to, nalloc(argv[i], GTO));
 209         for (; argv[i] != NULL; i++)
 210                 smopts = cat(smopts, nalloc(argv[i], 0));
 211         /*
 212          * Check for inconsistent arguments.
 213          */
 214         if (to == NULL && (subject != NULL || cc != NULL || bcc != NULL))
 215                 errx(1, "You must specify direct recipients with -s, -c, or -b.");
 216         if (ef != NULL && to != NULL)
 217                 errx(1, "Cannot give -f and people to send to.");
 218         tinit();
 219         setscreensize();
 220         input = stdin;
 221         rcvmode = !to;
 222         spreserve();
 223         if (!nosrc) {
 224                 char *s, *path_rc;
 225
 226                 if ((path_rc = malloc(sizeof(_PATH_MASTER_RC))) == NULL)
 227                         err(1, "malloc(path_rc) failed");
 228
 229                 strcpy(path_rc, _PATH_MASTER_RC);
 230                 while ((s = strsep(&path_rc, ":")) != NULL)
 231                         if (*s != '\0')
 232                                 load(s);
 233         }
 234         /*
 235          * Expand returns a savestr, but load only uses the file name
 236          * for fopen, so it's safe to do this.
 237          */
 238         if ((rc = getenv("MAILRC")) == NULL)
 239                 rc = "~/.mailrc";
 240         load(expand(rc));
 241
 242         replyto = value("REPLYTO");
 243         if (!rcvmode) {
 244                 mail(to, cc, bcc, smopts, subject, replyto);
 245                 /*
 246                  * why wait?
 247                  */
 248                 exit(senderr);
 249         }
 250
 251         if (value("checkmode") != NULL) {
 252                 if (ef == NULL)
 253                         ef = "%s";
 254                 if (setfile(ef) <= 0) {
 255                         /* Either an error has occured, or no mail. */
 256                         exit(1);
 257                 } else {
 258                         exit(0);
 259                 }
 260                 /* NOTREACHED */
 261         }
 262         /*
 263          * Ok, we are reading mail.
 264          * Decide whether we are editing a mailbox or reading
 265          * the system mailbox, and open up the right stuff.
 266          */
 267         if (ef == NULL)
 268                 ef = "%";
 269         if (setfile(ef) < 0)
 270                 exit(1);                /* error already reported */
 271         if (setjmp(hdrjmp) == 0) {
 272                 if ((prevint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
 273                         signal(SIGINT, hdrstop);
 274                 if (value("quiet") == NULL)
 275                         printf("Mail version %s.  Type ? for help.\n",
 276                                 version);
 277                 announce();
 278                 fflush(stdout);
 279                 signal(SIGINT, prevint);
 280         }
 281
 282         /* If we were in header summary mode, it's time to exit. */
 283         if (value("headersummary") != NULL)
 284                 exit(0);
 285
 286         commands();
 287         signal(SIGHUP, SIG_IGN);
 288         signal(SIGINT, SIG_IGN);
 289         signal(SIGQUIT, SIG_IGN);
 290         quit();
 291         exit(0);
 292 }
 293
 294 /*
 295  * Interrupt printing of the headers.
 296  */
 297 /*ARGSUSED*/
 298 void
 299 hdrstop(int signo)
 300 {
 301         fflush(stdout);
 302         fprintf(stderr, "\nInterrupt\n");
 303         longjmp(hdrjmp, 1);
 304 }
 305
 306 /*
 307  * Compute what the screen size for printing headers should be.
 308  * We use the following algorithm for the height:
 309  *      If baud rate < 1200, use  9
 310  *      If baud rate = 1200, use 14
 311  *      If baud rate > 1200, use 24 or ws_row
 312  * Width is either 80 or ws_col;
 313  */
 314 void
 315 setscreensize(void)
 316 {
 317         struct termios tbuf;
 318         struct winsize ws;
 319         speed_t speed;
 320
 321         if (ioctl(1, TIOCGWINSZ, (char *)&ws) < 0)
 322                 ws.ws_col = ws.ws_row = 0;
 323         if (tcgetattr(1, &tbuf) < 0)
 324                 speed = B9600;
 325         else
 326                 speed = cfgetospeed(&tbuf);
 327         if (speed < B1200)
 328                 screenheight = 9;
 329         else if (speed == B1200)
 330                 screenheight = 14;
 331         else if (ws.ws_row != 0)
 332                 screenheight = ws.ws_row;
 333         else
 334                 screenheight = 24;
 335         if ((realscreenheight = ws.ws_row) == 0)
 336                 realscreenheight = 24;
 337         if ((screenwidth = ws.ws_col) == 0)
 338                 screenwidth = 80;
 339 }