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                                 advise("popen", "could not get file from shell");
 307                                 break;
 308                         }
 309
 310                         while (fgets(shell, sizeof(shell), f)) {
 311                                 *(strchr(shell, '\n')) = '\0';
 312
 313                                 if (*shell == '/')
 314                                         sprintf(file, "%s", shell);
 315                                 else {
 316                                         sprintf(file, "%s/%s", cwd, shell);
 317                                 }
 318                                 if (execprogl("anno", "anno",
 319                                                 "-nodate", "-append",
 320                                                 "-comp", attach_hdr,
 321                                                 "-text", file,
 322                                                 drft, (char *)NULL) != 0) {
 323                                         advise(NULL, "Could not add attachment header.");
 324                                 }
 325                         }
 326                         pclose(f);
 327                         break;
 328
 329                 case DETACHCMDSW:
 330                         /*
 331                         ** Detach files from current draft.
 332                         **
 333                         ** Interpret the arguments as
 334                         ** attachment numbers.  Decrement any remaining
 335                         ** argument number that is greater than the one
 336                         ** just processed after processing each one so
 337                         ** that the numbering stays correct.
 338                         */
 339                         for (arguments=argp+1; *arguments; arguments++) {
 340                                 int n;
 341
 342                                 if (**arguments == '\0') {
 343                                         continue;
 344                                 }
 345
 346                                 if (execprogl("anno", "anno", "-delete",
 347                                                 "-comp", attach_hdr,
 348                                                 "-number", *arguments, drft,
 349                                                 (char *)NULL) != 0) {
 350                                         advise(NULL, "Could not delete attachment header.");
 351                                 }
 352
 353                                 n = atoi(*arguments);
 354                                 for (argp=arguments+1; *argp; argp++) {
 355                                         if (atoi(*argp) > n) {
 356                                                 if (atoi(*argp) == 1) {
 357                                                         *argp = "";
 358                                                 } else {
 359                                                         sprintf(*argp, "%d", atoi(*argp) - 1);
 360                                                 }
 361                                         }
 362                                 }
 363                         }
 364                         break;
 365
 366                 case WHOMSW:
 367                         /* list recipients */
 368                         execprogl("whom", "whom", drft, (char *)NULL);
 369                         break;
 370
 371                 default:
 372                         /* Unknown command */
 373                         advise(NULL, "say what?");
 374                         break;
 375                 }
 376         }
 377         /*NOTREACHED*/
 378 }
 379
 380
 381
 382 /*
 383 ** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
 384 ** trailcmd".
 385 */
 386 static void
 387 writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
 388 {
 389         char *cp;
 390         /*
 391         ** Note that we do not quote -- the argp from the user
 392         ** is assumed to be quoted as they desire. (We can't treat
 393         ** it as pure literal as that would prevent them using ~,
 394         ** wildcards, etc.) The buffer produced by this function
 395         ** should be given to popen_in_dir() or system_in_dir() so
 396         ** that the current working directory is set correctly.
 397         */
 398         int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
 399         /*
 400         ** NB that some snprintf() return -1 on overflow rather than the
 401         ** new C99 mandated 'number of chars that would have been written'
 402         */
 403         /*
 404         ** length checks here and inside the loop allow for the
 405         ** trailing ';', trailcmd, '"' and NUL
 406         */
 407         int trailln = strlen(trailcmd) + 3;
 408         if (ln < 0 || ln + trailln > bufsz)
 409                 adios(NULL, "arguments too long");
 410
 411         cp = buf + ln;
 412
 413         while (*++argp) {
 414                 ln = strlen(*argp);
 415                 /* +1 for leading space */
 416                 if (ln + trailln + 1 > bufsz - (cp-buf))
 417                         adios(NULL, "arguments too long");
 418                 *cp++ = ' ';
 419                 memcpy(cp, *argp, ln+1);
 420                 cp += ln;
 421         }
 422         if (*trailcmd) {
 423                 *cp++ = ';';
 424                 strcpy(cp, trailcmd);
 425                 cp += trailln - 3;
 426         }
 427         *cp++ = '"';
 428         *cp = 0;
 429 }
 430
 431 /*
 432 ** Build a command line that causes the user's shell to list the file name
 433 ** arguments.  This handles and wildcard expansion, tilde expansion, etc.
 434 */
 435 static void
 436 writelscmd(char *buf, int bufsz, char **argp)
 437 {
 438         writesomecmd(buf, bufsz, "ls", "", argp);
 439 }
 440
 441 /*
 442 ** Like system(), but run the command in directory dir.
 443 ** This assumes the program is single-threaded!
 444 */
 445 static int
 446 system_in_dir(const char *dir, const char *cmd)
 447 {
 448         char olddir[BUFSIZ];
 449         int r;
 450         if (getcwd(olddir, sizeof(olddir)) == 0)
 451                 adios("getcwd", "could not get working directory");
 452         if (chdir(dir) != 0)
 453                 adios("chdir", "could not change working directory");
 454         r = system(cmd);
 455         if (chdir(olddir) != 0)
 456                 adios("chdir", "could not change working directory");
 457         return r;
 458 }
 459
 460 /* ditto for popen() */
 461 static FILE*
 462 popen_in_dir(const char *dir, const char *cmd, const char *type)
 463 {
 464         char olddir[BUFSIZ];
 465         FILE *f;
 466         if (getcwd(olddir, sizeof(olddir)) == 0)
 467                 adios("getcwd", "could not get working directory");
 468         if (chdir(dir) != 0)
 469                 adios("chdir", "could not change working directory");
 470         f = popen(cmd, type);
 471         if (chdir(olddir) != 0)
 472                 adios("chdir", "could not change working directory");
 473         return f;
 474 }
 475
 476
 477 /*
 478 ** EDIT
 479 */
 480
 481 static char *edsave = NULL;  /* the editor we used previously */
 482
 483
 484 static int
 485 editfile(char **ed, char **arg, char *file, int use)
 486 {
 487         int pid, status, vecp;
 488         char *cp, *vec[MAXARGS];
 489
 490         if (!*ed || !**ed) {
 491                 /* We have no explicit editor. */
 492                 if (edsave) {
 493                         /* Use the previous editor ... */
 494                         *ed = edsave;
 495                         if (!(cp = mhbasename(*ed)))
 496                                 cp = *ed;
 497
 498                         /* but prefer one specified via "editor-next" */
 499                         cp = concat(cp, "-next", NULL);
 500                         if ((cp = context_find(cp)))
 501                                 *ed = cp;
 502                 } else {
 503                         /* set initial editor */
 504                         *ed = defaulteditor;
 505                 }
 506         }
 507
 508         context_save();
 509         fflush(stdout);
 510
 511         switch (pid = fork()) {
 512         case NOTOK:
 513                 advise("fork", "unable to");
 514                 status = NOTOK;
 515                 break;
 516
 517         case OK:
 518                 vecp = 0;
 519                 vec[vecp++] = mhbasename(*ed);
 520                 while (arg && *arg) {
 521                         vec[vecp++] = *arg++;
 522                 }
 523                 vec[vecp++] = file;
 524                 vec[vecp] = NULL;
 525
 526                 execvp(*ed, vec);
 527                 fprintf(stderr, "%s: unable to exec ", invo_name);
 528                 perror(*ed);
 529                 _exit(-1);
 530
 531         default:
 532                 if ((status = pidwait(pid, NOTOK))) {
 533                         if ((status & 0xff00) == 0xff00) {
 534                                 /* cmd not found or pidwait() failed */
 535                                 status = -1;
 536                                 break;
 537                         }
 538                         if (status & 0x00ff) {
 539                                 /* terminated by signal */
 540                                 advise(NULL, "%s terminated by signal %d",
 541                                                 *ed, status & 0x7f);
 542                         } else {
 543                                 /* failure exit */
 544                                 advise(NULL, "%s exited with return code %d",
 545                                                 *ed, (status & 0xff00) >> 8);
 546                         }
 547                         status = -1;
 548                         break;
 549                 }
 550         }
 551
 552         /* remember which editor we used */
 553         edsave = getcpy(*ed);
 554
 555         *ed = NULL;
 556
 557         return status;
 558 }
 559
 560
 561 /*
 562 ** SEND
 563 */
 564
 565 static int
 566 sendfile(char **arg, char *file)
 567 {
 568         int vecp = 0;
 569         char *vec[MAXARGS];
 570
 571         context_save();
 572         fflush(stdout);
 573
 574         vec[vecp++] = "send";
 575         while (arg && *arg) {
 576                 vec[vecp++] = *arg++;
 577         }
 578         vec[vecp++] = file;
 579         vec[vecp] = NULL;
 580         execvp(*vec, vec);
 581         fprintf(stderr, "%s: unable to exec ", invo_name);
 582         perror("send");
 583         _exit(-1);
 584 }
 585
 586
 587 /*
 588 ** refile msg into another folder
 589 */
 590 static int
 591 refile(char **arg, char *file)
 592 {
 593         int vecp = 0;
 594         char *vec[MAXARGS];
 595
 596         vec[vecp++] = "refile";
 597         vec[vecp++] = "-nolink";  /* override bad .mh_profile defaults */
 598         vec[vecp++] = "-file";
 599         vec[vecp++] = file;
 600
 601         while (arg && *arg) {
 602                 vec[vecp++] = *arg++;
 603         }
 604         vec[vecp] = NULL;
 605
 606         context_save();
 607         fflush(stdout);
 608
 609         return execprog(*vec, vec);
 610 }
 611
 612
 613 /*
 614 ** Remove the draft file
 615 */
 616
 617 static int
 618 removefile(char *drft)
 619 {
 620         if (unlink(drft) == NOTOK)
 621                 adios(drft, "unable to unlink");
 622
 623         return OK;
 624 }