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                                 exit(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                                 exit(0);
 123                         case VERSIONSW:
 124                                 print_version(invo_name);
 125                                 exit(0);
 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                         /* sysexits.h EX_SOFTWARE */
 165                         exit(1);
 166                 }
 167         }
 168
 169         snprintf(prompt, sizeof(prompt), myprompt, invo_name);
 170         for (;;) {
 171                 if (!(argp = getans(prompt, aleqs))) {
 172                         exit(1);
 173                 }
 174                 switch (smatch(*argp, aleqs)) {
 175                 case DISPSW:
 176                         /* display the msg being replied to or distributed */
 177                         if ((cp = getenv("mhaltmsg")) && *cp) {
 178                                 execprogl(listproc, listproc, "-file", cp,
 179                                                 (char *)NULL);
 180                         } else {
 181                                 advise(NULL, "no alternate message to display");
 182                         }
 183                         break;
 184
 185                 case EDITSW:
 186                         /* Call an editor on the draft file */
 187                         if (*++argp)
 188                                 ed = *argp++;
 189                         editfile(&ed, argp, drft, NOUSE);
 190                         break;
 191
 192                 case LISTSW:
 193                         /* display the draft file */
 194                         execprogl(listproc, listproc, "-file", drft,
 195                                         (char *)NULL);
 196                         break;
 197
 198                 case QUITSW:
 199                         /* quit */
 200                         if (stat(drft, &st) != NOTOK) {
 201                                 advise(NULL, "draft left on %s", drft);
 202                         }
 203                         exit(1);
 204
 205                 case DELETESW:
 206                         /* Delete draft and exit */
 207                         removefile(drft);
 208                         exit(1);
 209
 210                 case SENDSW:
 211                         /* Send draft */
 212                         sendfile(++argp, drft);
 213                         break;
 214
 215                 case REFILEOPT:
 216                         /* Refile the draft */
 217                         if (refile(++argp, drft) == 0) {
 218                                 exit(0);
 219                         }
 220                         break;
 221
 222                 case CDCMDSW:
 223                         /*
 224                         ** Change the working directory for attachments
 225                         **
 226                         ** Run the directory through the user's shell
 227                         ** so that we can take advantage of any syntax
 228                         ** that the user is accustomed to.  Read back
 229                         ** the absolute path.
 230                         */
 231
 232                         if (*(argp+1) == NULL) {
 233                                 sprintf(buf, "$SHELL -c \"cd;pwd\"");
 234                         } else {
 235                                 writesomecmd(buf, BUFSIZ, "cd", "pwd", argp);
 236                         }
 237                         if ((f = popen_in_dir(cwd, buf, "r"))) {
 238                                 fgets(cwd, sizeof (cwd), f);
 239
 240                                 if (strchr(cwd, '\n'))
 241                                         *strchr(cwd, '\n') = '\0';
 242
 243                                 pclose(f);
 244                         } else {
 245                                 advise("popen", "could not get directory");
 246                         }
 247
 248                         break;
 249
 250                 case PWDCMDSW:
 251                         /* Print the working directory for attachments */
 252                         printf("%s\n", cwd);
 253                         break;
 254
 255                 case LSCMDSW:
 256                         /*
 257                         ** List files in the current attachment working
 258                         ** directory
 259                         **
 260                         ** Use the user's shell so that we can take
 261                         ** advantage of any syntax that the user is
 262                         ** accustomed to.
 263                         */
 264                         writelscmd(buf, sizeof(buf), argp);
 265                         system_in_dir(cwd, buf);
 266                         break;
 267
 268                 case ALISTCMDSW:
 269                         /*
 270                         ** List attachments on current draft.
 271                         */
 272                         if (execprogl("anno", "anno", "-list", "-comp",
 273                                         attach_hdr, "-number", drft,
 274                                         (char *)NULL) != 0) {
 275                                 advise(NULL, "Could not list attachment headers.");
 276                         }
 277                         break;
 278
 279                 case ATTACHCMDSW:
 280                         /*
 281                         ** Attach files to current draft.
 282                         */
 283
 284                         if (*(argp+1) == NULL) {
 285                                 advise(NULL, "attach command requires file argument(s).");
 286                                 break;
 287                         }
 288
 289                         /*
 290                         ** Build a command line that causes the user's
 291                         ** shell to list the file name arguments.
 292                         ** This handles and wildcard expansion, tilde
 293                         ** expansion, etc.
 294                         */
 295                         writelscmd(buf, sizeof(buf), argp);
 296
 297                         /*
 298                         ** Read back the response from the shell,
 299                         ** which contains a number of lines with one
 300                         ** file name per line.  Remove off the newline.
 301                         ** Determine whether we have an absolute or
 302                         ** relative path name.  Prepend the current
 303                         ** working directory to relative path names.
 304                         ** Add the attachment annotation to the draft.
 305                         */
 306                         if (!(f = popen_in_dir(cwd, buf, "r"))) {
 307                                 advise("popen", "could not get file from shell");
 308                                 break;
 309                         }
 310
 311                         while (fgets(shell, sizeof(shell), f)) {
 312                                 *(strchr(shell, '\n')) = '\0';
 313
 314                                 if (*shell == '/')
 315                                         sprintf(file, "%s", shell);
 316                                 else {
 317                                         sprintf(file, "%s/%s", cwd, shell);
 318                                 }
 319                                 if (execprogl("anno", "anno",
 320                                                 "-nodate", "-append",
 321                                                 "-comp", attach_hdr,
 322                                                 "-text", file,
 323                                                 drft, (char *)NULL) != 0) {
 324                                         advise(NULL, "Could not add attachment header.");
 325                                 }
 326                         }
 327                         pclose(f);
 328                         break;
 329
 330                 case DETACHCMDSW:
 331                         /*
 332                         ** Detach files from current draft.
 333                         **
 334                         ** Interpret the arguments as
 335                         ** attachment numbers.  Decrement any remaining
 336                         ** argument number that is greater than the one
 337                         ** just processed after processing each one so
 338                         ** that the numbering stays correct.
 339                         */
 340                         for (arguments=argp+1; *arguments; arguments++) {
 341                                 int n;
 342
 343                                 if (**arguments == '\0') {
 344                                         continue;
 345                                 }
 346
 347                                 if (execprogl("anno", "anno", "-delete",
 348                                                 "-comp", attach_hdr,
 349                                                 "-number", *arguments, drft,
 350                                                 (char *)NULL) != 0) {
 351                                         advise(NULL, "Could not delete attachment header.");
 352                                 }
 353
 354                                 n = atoi(*arguments);
 355                                 for (argp=arguments+1; *argp; argp++) {
 356                                         if (atoi(*argp) > n) {
 357                                                 if (atoi(*argp) == 1) {
 358                                                         *argp = "";
 359                                                 } else {
 360                                                         sprintf(*argp, "%d", atoi(*argp) - 1);
 361                                                 }
 362                                         }
 363                                 }
 364                         }
 365                         break;
 366
 367                 case WHOMSW:
 368                         /* list recipients */
 369                         execprogl("whom", "whom", drft, (char *)NULL);
 370                         break;
 371
 372                 default:
 373                         /* Unknown command */
 374                         advise(NULL, "say what?");
 375                         break;
 376                 }
 377         }
 378         /*NOTREACHED*/
 379 }
 380
 381
 382
 383 /*
 384 ** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
 385 ** trailcmd".
 386 */
 387 static void
 388 writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
 389 {
 390         char *cp;
 391         /*
 392         ** Note that we do not quote -- the argp from the user
 393         ** is assumed to be quoted as they desire. (We can't treat
 394         ** it as pure literal as that would prevent them using ~,
 395         ** wildcards, etc.) The buffer produced by this function
 396         ** should be given to popen_in_dir() or system_in_dir() so
 397         ** that the current working directory is set correctly.
 398         */
 399         int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
 400         /*
 401         ** NB that some snprintf() return -1 on overflow rather than the
 402         ** new C99 mandated 'number of chars that would have been written'
 403         */
 404         /*
 405         ** length checks here and inside the loop allow for the
 406         ** trailing ';', trailcmd, '"' and NUL
 407         */
 408         int trailln = strlen(trailcmd) + 3;
 409         if (ln < 0 || ln + trailln > bufsz)
 410                 adios(NULL, "arguments too long");
 411
 412         cp = buf + ln;
 413
 414         while (*++argp) {
 415                 ln = strlen(*argp);
 416                 /* +1 for leading space */
 417                 if (ln + trailln + 1 > bufsz - (cp-buf))
 418                         adios(NULL, "arguments too long");
 419                 *cp++ = ' ';
 420                 memcpy(cp, *argp, ln+1);
 421                 cp += ln;
 422         }
 423         if (*trailcmd) {
 424                 *cp++ = ';';
 425                 strcpy(cp, trailcmd);
 426                 cp += trailln - 3;
 427         }
 428         *cp++ = '"';
 429         *cp = 0;
 430 }
 431
 432 /*
 433 ** Build a command line that causes the user's shell to list the file name
 434 ** arguments.  This handles and wildcard expansion, tilde expansion, etc.
 435 */
 436 static void
 437 writelscmd(char *buf, int bufsz, char **argp)
 438 {
 439         writesomecmd(buf, bufsz, "ls", "", argp);
 440 }
 441
 442 /*
 443 ** Like system(), but run the command in directory dir.
 444 ** This assumes the program is single-threaded!
 445 */
 446 static int
 447 system_in_dir(const char *dir, const char *cmd)
 448 {
 449         char olddir[BUFSIZ];
 450         int r;
 451         if (getcwd(olddir, sizeof(olddir)) == 0)
 452                 adios("getcwd", "could not get working directory");
 453         if (chdir(dir) != 0)
 454                 adios("chdir", "could not change working directory");
 455         r = system(cmd);
 456         if (chdir(olddir) != 0)
 457                 adios("chdir", "could not change working directory");
 458         return r;
 459 }
 460
 461 /* ditto for popen() */
 462 static FILE*
 463 popen_in_dir(const char *dir, const char *cmd, const char *type)
 464 {
 465         char olddir[BUFSIZ];
 466         FILE *f;
 467         if (getcwd(olddir, sizeof(olddir)) == 0)
 468                 adios("getcwd", "could not get working directory");
 469         if (chdir(dir) != 0)
 470                 adios("chdir", "could not change working directory");
 471         f = popen(cmd, type);
 472         if (chdir(olddir) != 0)
 473                 adios("chdir", "could not change working directory");
 474         return f;
 475 }
 476
 477
 478 /*
 479 ** EDIT
 480 */
 481
 482 static char *edsave = NULL;  /* the editor we used previously */
 483
 484
 485 static int
 486 editfile(char **ed, char **arg, char *file, int use)
 487 {
 488         int pid, status, vecp;
 489         char *cp, *vec[MAXARGS];
 490
 491         if (!*ed || !**ed) {
 492                 /* We have no explicit editor. */
 493                 if (edsave) {
 494                         /* Use the previous editor ... */
 495                         *ed = edsave;
 496                         if (!(cp = mhbasename(*ed)))
 497                                 cp = *ed;
 498
 499                         /* but prefer one specified via "editor-next" */
 500                         cp = concat(cp, "-next", NULL);
 501                         if ((cp = context_find(cp)))
 502                                 *ed = cp;
 503                 } else {
 504                         /* set initial editor */
 505                         *ed = defaulteditor;
 506                 }
 507         }
 508
 509         context_save();
 510         fflush(stdout);
 511
 512         switch (pid = fork()) {
 513         case NOTOK:
 514                 advise("fork", "unable to");
 515                 status = NOTOK;
 516                 break;
 517
 518         case OK:
 519                 vecp = 0;
 520                 vec[vecp++] = mhbasename(*ed);
 521                 while (arg && *arg) {
 522                         vec[vecp++] = *arg++;
 523                 }
 524                 vec[vecp++] = file;
 525                 vec[vecp] = NULL;
 526
 527                 execvp(*ed, vec);
 528                 fprintf(stderr, "%s: unable to exec ", invo_name);
 529                 perror(*ed);
 530                 _exit(-1);
 531
 532         default:
 533                 if ((status = pidwait(pid, NOTOK))) {
 534                         if ((status & 0xff00) == 0xff00) {
 535                                 /* cmd not found or pidwait() failed */
 536                                 status = -1;
 537                                 break;
 538                         }
 539                         if (status & 0x00ff) {
 540                                 /* terminated by signal */
 541                                 advise(NULL, "%s terminated by signal %d",
 542                                                 *ed, status & 0x7f);
 543                         } else {
 544                                 /* failure exit */
 545                                 advise(NULL, "%s exited with return code %d",
 546                                                 *ed, (status & 0xff00) >> 8);
 547                         }
 548                         status = -1;
 549                         break;
 550                 }
 551         }
 552
 553         /* remember which editor we used */
 554         edsave = getcpy(*ed);
 555
 556         *ed = NULL;
 557
 558         return status;
 559 }
 560
 561
 562 /*
 563 ** SEND
 564 */
 565
 566 static int
 567 sendfile(char **arg, char *file)
 568 {
 569         int vecp = 0;
 570         char *vec[MAXARGS];
 571
 572         context_save();
 573         fflush(stdout);
 574
 575         vec[vecp++] = "send";
 576         while (arg && *arg) {
 577                 vec[vecp++] = *arg++;
 578         }
 579         vec[vecp++] = file;
 580         vec[vecp] = NULL;
 581         execvp(*vec, vec);
 582         fprintf(stderr, "%s: unable to exec ", invo_name);
 583         perror("send");
 584         _exit(-1);
 585 }
 586
 587
 588 /*
 589 ** refile msg into another folder
 590 */
 591 static int
 592 refile(char **arg, char *file)
 593 {
 594         int vecp = 0;
 595         char *vec[MAXARGS];
 596
 597         vec[vecp++] = "refile";
 598         vec[vecp++] = "-nolink";  /* override bad .mh_profile defaults */
 599         vec[vecp++] = "-file";
 600         vec[vecp++] = file;
 601
 602         while (arg && *arg) {
 603                 vec[vecp++] = *arg++;
 604         }
 605         vec[vecp] = NULL;
 606
 607         context_save();
 608         fflush(stdout);
 609
 610         return execprog(*vec, vec);
 611 }
 612
 613
 614 /*
 615 ** Remove the draft file
 616 */
 617
 618 static int
 619 removefile(char *drft)
 620 {
 621         if (unlink(drft) == NOTOK)
 622                 adios(drft, "unable to unlink");
 623
 624         return OK;
 625 }