git.marmaro.de Git - mmh/blob - uip/whatnow.c

   1 /*
   2 ** whatnow.c -- the WhatNow shell
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <fcntl.h>
  11 #include <signal.h>
  12 #include <h/mime.h>
  13 #include <h/utils.h>
  14
  15 static struct swit switches[] = {
  16 #define EDITRSW  0
  17         { "editor editor", 0 },
  18 #define PRMPTSW  1
  19         { "prompt string", 0 },
  20 #define VERSIONSW  2
  21         { "Version", 0 },
  22 #define HELPSW  3
  23         { "help", 0 },
  24         { NULL, 0 }
  25 };
  26
  27 /*
  28 ** Options at the "whatnow" prompt
  29 */
  30 static struct swit aleqs[] = {
  31 #define EDITSW  0
  32         { "edit [editor [switches]]", 0 },
  33 #define LISTSW  1
  34         { "list", 0 },
  35 #define DISPSW  2
  36         { "display", 0 },
  37 #define WHOMSW  3
  38         { "whom", 0 },
  39 #define SENDSW  4
  40         { "send", 0 },
  41 #define REFILEOPT  5
  42         { "refile +folder", 0 },
  43 #define DELETESW  6
  44         { "delete", 0 },
  45 #define QUITSW  7
  46         { "quit", 0 },
  47 #define CDCMDSW  8
  48         { "cd [directory]", 0 },
  49 #define PWDCMDSW  9
  50         { "pwd", 0 },
  51 #define LSCMDSW  10
  52         { "ls", 0 },
  53 #define ALISTCMDSW  11
  54         { "alist", 0 },
  55 #define ATTACHCMDSW  12
  56         { "attach files", 0 },
  57 #define DETACHCMDSW  13
  58         { "detach numbers", 0 },
  59         { NULL, 0 }
  60 };
  61
  62 static char *myprompt = "\nWhat now? ";
  63
  64 /*
  65 ** static prototypes
  66 */
  67 static int editfile(char **, char **, char *, int);
  68 static int sendfile(char **, char *);
  69 static int refile(char **, char *);
  70 static int removefile(char *);
  71 static void writelscmd(char *, int, char **);
  72 static void writesomecmd(char *, int, char *, char *, char **);
  73 static FILE* popen_in_dir(const char *, const char *, const char *);
  74 static int system_in_dir(const char *, const char *);
  75
  76
  77 int
  78 main(int argc, char **argv)
  79 {
  80         int use = 0;
  81         char *cp;
  82         char *ed = NULL, *drft = NULL;
  83         char buf[BUFSIZ], prompt[BUFSIZ];
  84         char **argp, **arguments;
  85         struct stat st;
  86         char cwd[MAXPATHLEN + 1];  /* current working directory */
  87         char file[MAXPATHLEN + 1];  /* file name buffer */
  88         char shell[MAXPATHLEN + 1];  /* shell response buffer */
  89         FILE *f;  /* read pointer for bgnd proc */
  90
  91         setlocale(LC_ALL, "");
  92         invo_name = mhbasename(argv[0]);
  93
  94         /* read user profile/context */
  95         context_read();
  96
  97         arguments = getarguments(invo_name, argc, argv, 1);
  98         argp = arguments;
  99
 100         /*
 101         ** Get the initial current working directory.
 102         */
 103
 104         if (!getcwd(cwd, sizeof (cwd))) {
 105                 adios("getcwd", "could not get working directory");
 106         }
 107
 108         while ((cp = *argp++)) {
 109                 if (*cp == '-') {
 110                         switch (smatch(++cp, switches)) {
 111                         case AMBIGSW:
 112                                 ambigsw(cp, switches);
 113                                 done(1);
 114                         case UNKWNSW:
 115                                 adios(NULL, "-%s unknown", cp);
 116
 117                         case HELPSW:
 118                                 snprintf(buf, sizeof(buf),
 119                                                 "%s [switches] [file]",
 120                                                 invo_name);
 121                                 print_help(buf, switches, 1);
 122                                 done(1);
 123                         case VERSIONSW:
 124                                 print_version(invo_name);
 125                                 done(1);
 126
 127                         case EDITRSW:
 128                                 if (!(ed = *argp++) || *ed == '-')
 129                                         adios(NULL, "missing argument to %s",
 130                                                         argp[-2]);
 131                                 continue;
 132
 133                         case PRMPTSW:
 134                                 if (!(myprompt = *argp++) || *myprompt == '-')
 135                                         adios(NULL, "missing argument to %s",
 136                                                         argp[-2]);
 137                                 continue;
 138
 139                         }
 140                 }
 141                 if (drft)
 142                         adios(NULL, "only one draft at a time!");
 143                 else
 144                         drft = cp;
 145         }
 146
 147         if ((!drft && !(drft = getenv("mhdraft"))) || !*drft)
 148                 drft = getcpy(m_draft(seq_cur));
 149
 150         if ((cp = getenv("mhuse")) && *cp)
 151                 use = atoi(cp);
 152
 153         if (!ed && !(ed = getenv("mheditor"))) {
 154                 ed = "";  /* Don't initially edit the draft */
 155         }
 156
 157         /* start editing the draft, unless editor is the empty string */
 158         if (*ed) {
 159                 if (editfile(&ed, NULL, drft, use) <0) {
 160                         if (!use) {
 161                                 unlink(drft);
 162                         }
 163                         advise(NULL, "Try again.");
 164                         done(1);
 165                 }
 166         }
 167
 168         snprintf(prompt, sizeof(prompt), myprompt, invo_name);
 169         for (;;) {
 170                 if (!(argp = getans(prompt, aleqs))) {
 171                         done(1);
 172                 }
 173                 switch (smatch(*argp, aleqs)) {
 174                 case DISPSW:
 175                         /* display the msg being replied to or distributed */
 176                         if ((cp = getenv("mhaltmsg")) && *cp) {
 177                                 execprogl(listproc, listproc, "-file", cp,
 178                                                 (char *)NULL);
 179                         } else {
 180                                 advise(NULL, "no alternate message to display");
 181                         }
 182                         break;
 183
 184                 case EDITSW:
 185                         /* Call an editor on the draft file */
 186                         if (*++argp)
 187                                 ed = *argp++;
 188                         editfile(&ed, argp, drft, NOUSE);
 189                         break;
 190
 191                 case LISTSW:
 192                         /* display the draft file */
 193                         execprogl(listproc, listproc, "-file", drft,
 194                                         (char *)NULL);
 195                         break;
 196
 197                 case QUITSW:
 198                         /* quit */
 199                         if (stat(drft, &st) != NOTOK) {
 200                                 advise(NULL, "draft left on %s", drft);
 201                         }
 202                         done(1);
 203
 204                 case DELETESW:
 205                         /* Delete draft and exit */
 206                         removefile(drft);
 207                         done(1);
 208
 209                 case SENDSW:
 210                         /* Send draft */
 211                         sendfile(++argp, drft);
 212                         break;
 213
 214                 case REFILEOPT:
 215                         /* Refile the draft */
 216                         if (refile(++argp, drft) == 0) {
 217                                 done(0);
 218                         }
 219                         break;
 220
 221                 case CDCMDSW:
 222                         /*
 223                         ** Change the working directory for attachments
 224                         **
 225                         ** Run the directory through the user's shell
 226                         ** so that we can take advantage of any syntax
 227                         ** that the user is accustomed to.  Read back
 228                         ** the absolute path.
 229                         */
 230
 231                         if (*(argp+1) == NULL) {
 232                                 sprintf(buf, "$SHELL -c \"cd;pwd\"");
 233                         } else {
 234                                 writesomecmd(buf, BUFSIZ, "cd", "pwd", argp);
 235                         }
 236                         if ((f = popen_in_dir(cwd, buf, "r"))) {
 237                                 fgets(cwd, sizeof (cwd), f);
 238
 239                                 if (strchr(cwd, '\n'))
 240                                         *strchr(cwd, '\n') = '\0';
 241
 242                                 pclose(f);
 243                         } else {
 244                                 advise("popen", "could not get directory");
 245                         }
 246
 247                         break;
 248
 249                 case PWDCMDSW:
 250                         /* Print the working directory for attachments */
 251                         printf("%s\n", cwd);
 252                         break;
 253
 254                 case LSCMDSW:
 255                         /*
 256                         ** List files in the current attachment working
 257                         ** directory
 258                         **
 259                         ** Use the user's shell so that we can take
 260                         ** advantage of any syntax that the user is
 261                         ** accustomed to.
 262                         */
 263                         writelscmd(buf, sizeof(buf), argp);
 264                         system_in_dir(cwd, buf);
 265                         break;
 266
 267                 case ALISTCMDSW:
 268                         /*
 269                         ** List attachments on current draft.
 270                         */
 271                         if (execprogl("anno", "anno", "-list", "-comp",
 272                                         attach_hdr, "-number", drft,
 273                                         (char *)NULL) != 0) {
 274                                 advise(NULL, "Could not list attachment headers.");
 275                         }
 276                         break;
 277
 278                 case ATTACHCMDSW:
 279                         /*
 280                         ** Attach files to current draft.
 281                         */
 282
 283                         if (*(argp+1) == NULL) {
 284                                 advise(NULL, "attach command requires file argument(s).");
 285                                 break;
 286                         }
 287
 288                         /*
 289                         ** Build a command line that causes the user's
 290                         ** shell to list the file name arguments.
 291                         ** This handles and wildcard expansion, tilde
 292                         ** expansion, etc.
 293                         */
 294                         writelscmd(buf, sizeof(buf), argp);
 295
 296                         /*
 297                         ** Read back the response from the shell,
 298                         ** which contains a number of lines with one
 299                         ** file name per line.  Remove off the newline.
 300                         ** Determine whether we have an absolute or
 301                         ** relative path name.  Prepend the current
 302                         ** working directory to relative path names.
 303                         ** Add the attachment annotation to the draft.
 304                         */
 305                         if ((f = popen_in_dir(cwd, buf, "r"))) {
 306                                 while (fgets(shell, sizeof(shell), f)) {
 307                                         *(strchr(shell, '\n')) = '\0';
 308
 309                                         if (*shell == '/')
 310                                                 sprintf(file, "%s", shell);
 311                                         else {
 312                                                 sprintf(file, "%s/%s", cwd,
 313                                                                 shell);
 314                                         }
 315                                         if (execprogl("anno", "anno",
 316                                                         "-nodate",
 317                                                         "-append", "-comp",
 318                                                         attach_hdr, "-text",
 319                                                         file, drft,
 320                                                         (char *)NULL)
 321                                                         != 0) {
 322                                                 advise(NULL, "Could not add attachment header.");
 323                                         }
 324                                 }
 325
 326                                 pclose(f);
 327                         } else {
 328                                 advise("popen", "could not get file from shell");
 329                         }
 330
 331                         break;
 332
 333                 case DETACHCMDSW:
 334                         /*
 335                         ** Detach files from current draft.
 336                         **
 337                         ** Interpret the arguments as
 338                         ** attachment numbers.  Decrement any remaining
 339                         ** argument number that is greater than the one
 340                         ** just processed after processing each one so
 341                         ** that the numbering stays correct.
 342                         */
 343                         for (arguments=argp+1; *arguments; arguments++) {
 344                                 int n;
 345
 346                                 if (**arguments == '\0') {
 347                                         continue;
 348                                 }
 349
 350                                 if (execprogl("anno", "anno", "-delete",
 351                                                 "-comp", attach_hdr,
 352                                                 "-number", *arguments, drft,
 353                                                 (char *)NULL) != 0) {
 354                                         advise(NULL, "Could not delete attachment header.");
 355                                 }
 356
 357                                 n = atoi(*arguments);
 358                                 for (argp=arguments+1; *argp; argp++) {
 359                                         if (atoi(*argp) > n) {
 360                                                 if (atoi(*argp) == 1) {
 361                                                         *argp = "";
 362                                                 } else {
 363                                                         sprintf(*argp, "%d", atoi(*argp) - 1);
 364                                                 }
 365                                         }
 366                                 }
 367                         }
 368                         break;
 369
 370                 case WHOMSW:
 371                         /* list recipients */
 372                         execprogl("whom", "whom", drft, (char *)NULL);
 373                         break;
 374
 375                 default:
 376                         /* Unknown command */
 377                         advise(NULL, "say what?");
 378                         break;
 379                 }
 380         }
 381         /*NOTREACHED*/
 382 }
 383
 384
 385
 386 /*
 387 ** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
 388 ** trailcmd".
 389 */
 390 static void
 391 writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
 392 {
 393         char *cp;
 394         /*
 395         ** Note that we do not quote -- the argp from the user
 396         ** is assumed to be quoted as they desire. (We can't treat
 397         ** it as pure literal as that would prevent them using ~,
 398         ** wildcards, etc.) The buffer produced by this function
 399         ** should be given to popen_in_dir() or system_in_dir() so
 400         ** that the current working directory is set correctly.
 401         */
 402         int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
 403         /*
 404         ** NB that some snprintf() return -1 on overflow rather than the
 405         ** new C99 mandated 'number of chars that would have been written'
 406         */
 407         /*
 408         ** length checks here and inside the loop allow for the
 409         ** trailing ';', trailcmd, '"' and NUL
 410         */
 411         int trailln = strlen(trailcmd) + 3;
 412         if (ln < 0 || ln + trailln > bufsz)
 413                 adios(NULL, "arguments too long");
 414
 415         cp = buf + ln;
 416
 417         while (*++argp) {
 418                 ln = strlen(*argp);
 419                 /* +1 for leading space */
 420                 if (ln + trailln + 1 > bufsz - (cp-buf))
 421                         adios(NULL, "arguments too long");
 422                 *cp++ = ' ';
 423                 memcpy(cp, *argp, ln+1);
 424                 cp += ln;
 425         }
 426         if (*trailcmd) {
 427                 *cp++ = ';';
 428                 strcpy(cp, trailcmd);
 429                 cp += trailln - 3;
 430         }
 431         *cp++ = '"';
 432         *cp = 0;
 433 }
 434
 435 /*
 436 ** Build a command line that causes the user's shell to list the file name
 437 ** arguments.  This handles and wildcard expansion, tilde expansion, etc.
 438 */
 439 static void
 440 writelscmd(char *buf, int bufsz, char **argp)
 441 {
 442         writesomecmd(buf, bufsz, "ls", "", argp);
 443 }
 444
 445 /*
 446 ** Like system(), but run the command in directory dir.
 447 ** This assumes the program is single-threaded!
 448 */
 449 static int
 450 system_in_dir(const char *dir, const char *cmd)
 451 {
 452         char olddir[BUFSIZ];
 453         int r;
 454         if (getcwd(olddir, sizeof(olddir)) == 0)
 455                 adios("getcwd", "could not get working directory");
 456         if (chdir(dir) != 0)
 457                 adios("chdir", "could not change working directory");
 458         r = system(cmd);
 459         if (chdir(olddir) != 0)
 460                 adios("chdir", "could not change working directory");
 461         return r;
 462 }
 463
 464 /* ditto for popen() */
 465 static FILE*
 466 popen_in_dir(const char *dir, const char *cmd, const char *type)
 467 {
 468         char olddir[BUFSIZ];
 469         FILE *f;
 470         if (getcwd(olddir, sizeof(olddir)) == 0)
 471                 adios("getcwd", "could not get working directory");
 472         if (chdir(dir) != 0)
 473                 adios("chdir", "could not change working directory");
 474         f = popen(cmd, type);
 475         if (chdir(olddir) != 0)
 476                 adios("chdir", "could not change working directory");
 477         return f;
 478 }
 479
 480
 481 /*
 482 ** EDIT
 483 */
 484
 485 static char *edsave = NULL;  /* the editor we used previously */
 486
 487
 488 static int
 489 editfile(char **ed, char **arg, char *file, int use)
 490 {
 491         int pid, status, vecp;
 492         char *cp, *vec[MAXARGS];
 493
 494         if (!*ed || !**ed) {
 495                 /* We have no explicit editor. */
 496                 if (edsave) {
 497                         /* Use the previous editor ... */
 498                         *ed = edsave;
 499                         if (!(cp = mhbasename(*ed)))
 500                                 cp = *ed;
 501
 502                         /* but prefer one specified via "editor-next" */
 503                         cp = concat(cp, "-next", NULL);
 504                         if ((cp = context_find(cp)))
 505                                 *ed = cp;
 506                 } else {
 507                         /* set initial editor */
 508                         *ed = defaulteditor;
 509                 }
 510         }
 511
 512         context_save();
 513         fflush(stdout);
 514
 515         switch (pid = fork()) {
 516         case NOTOK:
 517                 advise("fork", "unable to");
 518                 status = NOTOK;
 519                 break;
 520
 521         case OK:
 522                 vecp = 0;
 523                 vec[vecp++] = mhbasename(*ed);
 524                 if (arg)
 525                         while (*arg)
 526                                 vec[vecp++] = *arg++;
 527                 vec[vecp++] = file;
 528                 vec[vecp] = NULL;
 529
 530                 execvp(*ed, vec);
 531                 fprintf(stderr, "%s: unable to exec ", invo_name);
 532                 perror(*ed);
 533                 _exit(-1);
 534
 535         default:
 536                 if ((status = pidwait(pid, NOTOK))) {
 537                         if ((status & 0xff00) == 0xff00) {
 538                                 /* cmd not found or pidwait() failed */
 539                                 status = -1;
 540                                 break;
 541                         }
 542                         if (status & 0x00ff) {
 543                                 /* terminated by signal */
 544                                 advise(NULL, "%s terminated by signal %d",
 545                                                 *ed, status & 0x7f);
 546                         } else {
 547                                 /* failure exit */
 548                                 advise(NULL, "%s exited with return code %d",
 549                                                 *ed, (status & 0xff00) >> 8);
 550                         }
 551                         status = -1;
 552                         break;
 553                 }
 554         }
 555
 556         /* remember which editor we used */
 557         edsave = getcpy(*ed);
 558
 559         *ed = NULL;
 560
 561         return status;
 562 }
 563
 564
 565 /*
 566 ** SEND
 567 */
 568
 569 static int
 570 sendfile(char **arg, char *file)
 571 {
 572         pid_t child_id;
 573         int vecp;
 574         char *vec[MAXARGS];
 575
 576         context_save();  /* save the context file */
 577         fflush(stdout);
 578
 579         switch (child_id = fork()) {
 580         case NOTOK:
 581                 advise(NULL, "unable to fork, so sending directly...");
 582                 /* fall */
 583         case OK:
 584                 vecp = 0;
 585                 vec[vecp++] = "send";
 586                 if (arg)
 587                         while (*arg)
 588                                 vec[vecp++] = *arg++;
 589                 vec[vecp++] = file;
 590                 vec[vecp] = NULL;
 591
 592                 execvp("send", vec);
 593                 fprintf(stderr, "%s: unable to exec ", invo_name);
 594                 perror("send");
 595                 _exit(-1);
 596
 597         default:
 598                 if (pidwait(child_id, OK) == 0)
 599                         done(0);
 600                 return 1;
 601         }
 602 }
 603
 604
 605 /*
 606 ** refile msg into another folder
 607 */
 608 static int
 609 refile(char **arg, char *file)
 610 {
 611         pid_t pid;
 612         register int vecp;
 613         char *vec[MAXARGS];
 614
 615         vecp = 0;
 616         vec[vecp++] = "refile";
 617         vec[vecp++] = "-nolink";  /* override bad .mh_profile defaults */
 618         vec[vecp++] = "-file";
 619         vec[vecp++] = file;
 620
 621         while (arg && *arg) {
 622                 vec[vecp++] = *arg++;
 623         }
 624         vec[vecp] = NULL;
 625
 626         context_save();  /* save the context file */
 627         fflush(stdout);
 628
 629         switch (pid = fork()) {
 630         case -1:
 631                 advise("fork", "unable to");
 632                 return -1;
 633
 634         case 0:
 635                 execvp(*vec, vec);
 636                 fprintf(stderr, "%s: unable to exec ", invo_name);
 637                 perror(*vec);
 638                 _exit(-1);
 639
 640         default:
 641                 return (pidwait(pid, -1));
 642         }
 643 }
 644
 645
 646 /*
 647 ** Remove the draft file
 648 */
 649
 650 static int
 651 removefile(char *drft)
 652 {
 653         if (unlink(drft) == NOTOK)
 654                 adios(drft, "unable to unlink");
 655
 656         return OK;
 657 }