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 #include <unistd.h>
  15 #include <sys/stat.h>
  16 #include <locale.h>
  17 #include <sysexits.h>
  18
  19 #ifdef HAVE_SYS_PARAM_H
  20 # include <sys/param.h>
  21 #endif
  22
  23 static struct swit switches[] = {
  24 #define EDITRSW  0
  25         { "editor editor", 0 },
  26 #define PRMPTSW  1
  27         { "prompt string", 0 },
  28 #define VERSIONSW  2
  29         { "Version", 0 },
  30 #define HELPSW  3
  31         { "help", 0 },
  32         { NULL, 0 }
  33 };
  34
  35 char *version=VERSION;
  36
  37 /*
  38 ** Options at the "whatnow" prompt
  39 */
  40 static struct swit aleqs[] = {
  41 #define EDITSW  0
  42         { "edit [editor [switches]]", 0 },
  43 #define LISTSW  1
  44         { "list", 0 },
  45 #define DISPSW  2
  46         { "display", 0 },
  47 #define WHOMSW  3
  48         { "whom", 0 },
  49 #define SENDSW  4
  50         { "send", 0 },
  51 #define REFILEOPT  5
  52         { "refile +folder", 0 },
  53 #define DELETESW  6
  54         { "delete", 0 },
  55 #define QUITSW  7
  56         { "quit", 0 },
  57 #define CDCMDSW  8
  58         { "cd [directory]", 0 },
  59 #define PWDCMDSW  9
  60         { "pwd", 0 },
  61 #define LSCMDSW  10
  62         { "ls", 0 },
  63 #define ALISTCMDSW  11
  64         { "alist", 0 },
  65 #define ATTACHCMDSW  12
  66         { "attach files", 0 },
  67 #define DETACHCMDSW  13
  68         { "detach numbers", 0 },
  69         { NULL, 0 }
  70 };
  71
  72 static char *myprompt = "\nWhat now? ";
  73
  74 /*
  75 ** static prototypes
  76 */
  77 static int editfile(char **, char **, char *);
  78 static int sendfile(char **, char *);
  79 static int refile(char **, char *);
  80 static int removefile(char *);
  81 static void writelscmd(char *, int, char **);
  82 static void writesomecmd(char *, int, char *, char *, char **);
  83 static FILE* popen_in_dir(const char *, const char *, const char *);
  84 static int system_in_dir(const char *, const char *);
  85
  86
  87 int
  88 main(int argc, char **argv)
  89 {
  90         int use = NOUSE;
  91         char *cp;
  92         char *ed = NULL, *drft = NULL;
  93         char buf[BUFSIZ], prompt[BUFSIZ];
  94         char **argp, **arguments;
  95         struct stat st;
  96         char cwd[MAXPATHLEN + 1];  /* current working directory */
  97         char file[MAXPATHLEN + 1];  /* file name buffer */
  98         char shell[MAXPATHLEN + 1];  /* shell response buffer */
  99         FILE *f;  /* read pointer for bgnd proc */
 100
 101         setlocale(LC_ALL, "");
 102         invo_name = mhbasename(argv[0]);
 103
 104         /* read user profile/context */
 105         context_read();
 106
 107         advise(NULL, "whatnow is deprecated. Consider switching to whatnow2.");
 108
 109         arguments = getarguments(invo_name, argc, argv, 1);
 110         argp = arguments;
 111
 112         /*
 113         ** Get the initial current working directory.
 114         */
 115
 116         if (!getcwd(cwd, sizeof (cwd))) {
 117                 adios(EX_USAGE, "getcwd", "could not get working directory");
 118         }
 119
 120         while ((cp = *argp++)) {
 121                 if (*cp == '-') {
 122                         switch (smatch(++cp, switches)) {
 123                         case AMBIGSW:
 124                                 ambigsw(cp, switches);
 125                                 exit(EX_USAGE);
 126                         case UNKWNSW:
 127                                 adios(EX_USAGE, NULL, "-%s unknown", cp);
 128
 129                         case HELPSW:
 130                                 snprintf(buf, sizeof(buf),
 131                                                 "%s [switches] [file]",
 132                                                 invo_name);
 133                                 print_help(buf, switches, 1);
 134                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 135                         case VERSIONSW:
 136                                 print_version(invo_name);
 137                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 138
 139                         case EDITRSW:
 140                                 if (!(ed = *argp++) || *ed == '-')
 141                                         adios(EX_USAGE, NULL, "missing argument to %s",
 142                                                         argp[-2]);
 143                                 continue;
 144
 145                         case PRMPTSW:
 146                                 if (!(myprompt = *argp++) || *myprompt == '-')
 147                                         adios(EX_USAGE, NULL, "missing argument to %s",
 148                                                         argp[-2]);
 149                                 continue;
 150
 151                         }
 152                 }
 153                 if (drft)
 154                         adios(EX_USAGE, NULL, "only one draft at a time!");
 155                 else
 156                         drft = cp;
 157         }
 158
 159         if ((!drft && !(drft = getenv("mhdraft"))) || !*drft)
 160                 drft = mh_xstrdup(m_draft(seq_cur));
 161
 162         if ((cp = getenv("mhuse")) && *cp)
 163                 use = atoi(cp);
 164
 165         if (!ed && !(ed = getenv("mheditor"))) {
 166                 ed = "";  /* Don't initially edit the draft */
 167         }
 168
 169         /* start editing the draft, unless editor is the empty string */
 170         if (*ed) {
 171                 if (editfile(&ed, NULL, drft) <0) {
 172                         if (!use) {
 173                                 unlink(drft);
 174                         }
 175                         adios(EX_SOFTWARE, NULL, "Try again.");
 176                 }
 177         }
 178
 179         snprintf(prompt, sizeof(prompt), myprompt, invo_name);
 180         while ((argp = getans(prompt, aleqs))) {
 181                 switch (smatch(*argp, aleqs)) {
 182                 case DISPSW:
 183                         /* display the msg being replied to or distributed */
 184                         if ((cp = getenv("mhaltmsg")) && *cp) {
 185                                 execprogl(listproc, listproc, "-file", cp,
 186                                                 (char *)NULL);
 187                         } else {
 188                                 advise(NULL, "no alternate message to display");
 189                         }
 190                         break;
 191
 192                 case EDITSW:
 193                         /* Call an editor on the draft file */
 194                         if (*++argp)
 195                                 ed = *argp++;
 196                         editfile(&ed, argp, drft);
 197                         break;
 198
 199                 case LISTSW:
 200                         /* display the draft file */
 201                         execprogl(listproc, listproc, "-file", drft,
 202                                         (char *)NULL);
 203                         break;
 204
 205                 case QUITSW:
 206                         /* quit */
 207                         if (stat(drft, &st) != NOTOK) {
 208                                 advise(NULL, "draft left on %s", drft);
 209                         }
 210                         exit(EX_OK);
 211
 212                 case DELETESW:
 213                         /* Delete draft and exit */
 214                         removefile(drft);
 215                         exit(EX_OK);
 216
 217                 case SENDSW:
 218                         /* Send draft */
 219                         sendfile(++argp, drft);
 220                         break;
 221
 222                 case REFILEOPT:
 223                         /* Refile the draft */
 224                         if (refile(++argp, drft) == 0) {
 225                                 exit(EX_OK);
 226                         }
 227                         break;
 228
 229                 case CDCMDSW:
 230                         /*
 231                         ** Change the working directory for attachments
 232                         **
 233                         ** Run the directory through the user's shell
 234                         ** so that we can take advantage of any syntax
 235                         ** that the user is accustomed to.  Read back
 236                         ** the absolute path.
 237                         */
 238
 239                         if (*(argp+1) == NULL) {
 240                                 sprintf(buf, "$SHELL -c \"cd;pwd\"");
 241                         } else {
 242                                 writesomecmd(buf, BUFSIZ, "cd", "pwd", argp);
 243                         }
 244                         if ((f = popen_in_dir(cwd, buf, "r"))) {
 245                                 fgets(cwd, sizeof (cwd), f);
 246
 247                                 if (strchr(cwd, '\n'))
 248                                         *strchr(cwd, '\n') = '\0';
 249
 250                                 pclose(f);
 251                         } else {
 252                                 advise("popen", "could not get directory");
 253                         }
 254
 255                         break;
 256
 257                 case PWDCMDSW:
 258                         /* Print the working directory for attachments */
 259                         printf("%s\n", cwd);
 260                         break;
 261
 262                 case LSCMDSW:
 263                         /*
 264                         ** List files in the current attachment working
 265                         ** directory
 266                         **
 267                         ** Use the user's shell so that we can take
 268                         ** advantage of any syntax that the user is
 269                         ** accustomed to.
 270                         */
 271                         writelscmd(buf, sizeof(buf), argp);
 272                         system_in_dir(cwd, buf);
 273                         break;
 274
 275                 case ALISTCMDSW:
 276                         /*
 277                         ** List attachments on current draft.
 278                         */
 279                         if (execprogl("anno", "anno", "-list", "-comp",
 280                                         attach_hdr, "-number", drft,
 281                                         (char *)NULL) != 0) {
 282                                 advise(NULL, "Could not list attachment headers.");
 283                         }
 284                         break;
 285
 286                 case ATTACHCMDSW:
 287                         /*
 288                         ** Attach files to current draft.
 289                         */
 290
 291                         if (*(argp+1) == NULL) {
 292                                 advise(NULL, "attach command requires file argument(s).");
 293                                 break;
 294                         }
 295
 296                         /*
 297                         ** Build a command line that causes the user's
 298                         ** shell to list the file name arguments.
 299                         ** This handles and wildcard expansion, tilde
 300                         ** expansion, etc.
 301                         */
 302                         writelscmd(buf, sizeof(buf), argp);
 303
 304                         /*
 305                         ** Read back the response from the shell,
 306                         ** which contains a number of lines with one
 307                         ** file name per line.  Remove off the newline.
 308                         ** Determine whether we have an absolute or
 309                         ** relative path name.  Prepend the current
 310                         ** working directory to relative path names.
 311                         ** Add the attachment annotation to the draft.
 312                         */
 313                         if (!(f = popen_in_dir(cwd, buf, "r"))) {
 314                                 advise("popen", "could not get file from shell");
 315                                 break;
 316                         }
 317
 318                         while (fgets(shell, sizeof(shell), f)) {
 319                                 *(strchr(shell, '\n')) = '\0';
 320
 321                                 if (*shell == '/')
 322                                         sprintf(file, "%s", shell);
 323                                 else {
 324                                         sprintf(file, "%s/%s", cwd, shell);
 325                                 }
 326                                 if (execprogl("anno", "anno",
 327                                                 "-nodate", "-append",
 328                                                 "-comp", attach_hdr,
 329                                                 "-text", file,
 330                                                 drft, (char *)NULL) != 0) {
 331                                         advise(NULL, "Could not add attachment header.");
 332                                 }
 333                         }
 334                         pclose(f);
 335                         break;
 336
 337                 case DETACHCMDSW:
 338                         /*
 339                         ** Detach files from current draft.
 340                         **
 341                         ** Interpret the arguments as
 342                         ** attachment numbers.  Decrement any remaining
 343                         ** argument number that is greater than the one
 344                         ** just processed after processing each one so
 345                         ** that the numbering stays correct.
 346                         */
 347                         for (arguments=argp+1; *arguments; arguments++) {
 348                                 int n;
 349
 350                                 if (**arguments == '\0') {
 351                                         continue;
 352                                 }
 353
 354                                 if (execprogl("anno", "anno", "-delete",
 355                                                 "-comp", attach_hdr,
 356                                                 "-number", *arguments, drft,
 357                                                 (char *)NULL) != 0) {
 358                                         advise(NULL, "Could not delete attachment header.");
 359                                 }
 360
 361                                 n = atoi(*arguments);
 362                                 for (argp=arguments+1; *argp; argp++) {
 363                                         if (atoi(*argp) > n) {
 364                                                 if (atoi(*argp) == 1) {
 365                                                         *argp = "";
 366                                                 } else {
 367                                                         sprintf(*argp, "%d", atoi(*argp) - 1);
 368                                                 }
 369                                         }
 370                                 }
 371                         }
 372                         break;
 373
 374                 case WHOMSW:
 375                         /* list recipients */
 376                         execprogl("whom", "whom", drft, (char *)NULL);
 377                         break;
 378
 379                 default:
 380                         /* Unknown command */
 381                         advise(NULL, "say what?");
 382                         break;
 383                 }
 384         }
 385
 386         exit(EX_IOERR);
 387 }
 388
 389
 390
 391 /*
 392 ** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
 393 ** trailcmd".
 394 */
 395 static void
 396 writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
 397 {
 398         char *cp;
 399         /*
 400         ** Note that we do not quote -- the argp from the user
 401         ** is assumed to be quoted as they desire. (We can't treat
 402         ** it as pure literal as that would prevent them using ~,
 403         ** wildcards, etc.) The buffer produced by this function
 404         ** should be given to popen_in_dir() or system_in_dir() so
 405         ** that the current working directory is set correctly.
 406         */
 407         int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
 408         /*
 409         ** NB that some snprintf() return -1 on overflow rather than the
 410         ** new C99 mandated 'number of chars that would have been written'
 411         */
 412         /*
 413         ** length checks here and inside the loop allow for the
 414         ** trailing ';', trailcmd, '"' and NUL
 415         */
 416         int trailln = strlen(trailcmd) + 3;
 417         if (ln < 0 || ln + trailln > bufsz)
 418                 adios(EX_USAGE, NULL, "arguments too long");
 419
 420         cp = buf + ln;
 421
 422         while (*++argp) {
 423                 ln = strlen(*argp);
 424                 /* +1 for leading space */
 425                 if (ln + trailln + 1 > bufsz - (cp-buf))
 426                         adios(EX_USAGE, NULL, "arguments too long");
 427                 *cp++ = ' ';
 428                 memcpy(cp, *argp, ln+1);
 429                 cp += ln;
 430         }
 431         if (*trailcmd) {
 432                 *cp++ = ';';
 433                 strcpy(cp, trailcmd);
 434                 cp += trailln - 3;
 435         }
 436         *cp++ = '"';
 437         *cp = 0;
 438 }
 439
 440 /*
 441 ** Build a command line that causes the user's shell to list the file name
 442 ** arguments.  This handles and wildcard expansion, tilde expansion, etc.
 443 */
 444 static void
 445 writelscmd(char *buf, int bufsz, char **argp)
 446 {
 447         writesomecmd(buf, bufsz, "ls", "", argp);
 448 }
 449
 450 /*
 451 ** Like system(), but run the command in directory dir.
 452 ** This assumes the program is single-threaded!
 453 */
 454 static int
 455 system_in_dir(const char *dir, const char *cmd)
 456 {
 457         char olddir[BUFSIZ];
 458         int r;
 459         if (getcwd(olddir, sizeof(olddir)) == 0)
 460                 adios(EX_OSERR, "getcwd", "could not get working directory");
 461         if (chdir(dir) != 0)
 462                 adios(EX_OSERR, "chdir", "could not change working directory");
 463         r = system(cmd);
 464         if (chdir(olddir) != 0)
 465                 adios(EX_OSERR, "chdir", "could not change working directory");
 466         return r;
 467 }
 468
 469 /* ditto for popen() */
 470 static FILE*
 471 popen_in_dir(const char *dir, const char *cmd, const char *type)
 472 {
 473         char olddir[BUFSIZ];
 474         FILE *f;
 475         if (getcwd(olddir, sizeof(olddir)) == 0)
 476                 adios(EX_OSERR, "getcwd", "could not get working directory");
 477         if (chdir(dir) != 0)
 478                 adios(EX_OSERR, "chdir", "could not change working directory");
 479         f = popen(cmd, type);
 480         if (chdir(olddir) != 0)
 481                 adios(EX_OSERR, "chdir", "could not change working directory");
 482         return f;
 483 }
 484
 485
 486 /*
 487 ** EDIT
 488 */
 489
 490 static char *edsave = NULL;  /* the editor we used previously */
 491
 492
 493 static int
 494 editfile(char **ed, char **arg, char *file)
 495 {
 496         int pid, status, vecp;
 497         char *cp, *vec[MAXARGS];
 498
 499         if (!*ed || !**ed) {
 500                 /* We have no explicit editor. */
 501                 if (edsave) {
 502                         /* Use the previous editor ... */
 503                         *ed = edsave;
 504                         if (!(cp = mhbasename(*ed)))
 505                                 cp = *ed;
 506
 507                         /* but prefer one specified via "editor-next" */
 508                         cp = concat(cp, "-next", NULL);
 509                         if ((cp = context_find(cp)))
 510                                 *ed = cp;
 511                 } else {
 512                         /* set initial editor */
 513                         *ed = defaulteditor;
 514                 }
 515         }
 516
 517         context_save();
 518         fflush(stdout);
 519
 520         switch (pid = fork()) {
 521         case NOTOK:
 522                 advise("fork", "unable to");
 523                 status = EX_OSERR;
 524                 break;
 525
 526         case OK:
 527                 vecp = 0;
 528                 vec[vecp++] = mhbasename(*ed);
 529                 while (arg && *arg) {
 530                         vec[vecp++] = *arg++;
 531                 }
 532                 vec[vecp++] = file;
 533                 vec[vecp] = NULL;
 534
 535                 execvp(*ed, vec);
 536                 fprintf(stderr, "%s: unable to exec ", invo_name);
 537                 perror(*ed);
 538                 _exit(EX_OSERR);
 539
 540         default:
 541                 if ((status = pidwait(pid, NOTOK))) {
 542                         if ((status & 0xff00) == 0xff00) {
 543                                 /* cmd not found or pidwait() failed */
 544                                 status = EX_SOFTWARE;
 545                                 break;
 546                         }
 547                         if (status & 0x00ff) {
 548                                 /* terminated by signal */
 549                                 advise(NULL, "%s terminated by signal %d",
 550                                                 *ed, status & 0x7f);
 551                         } else {
 552                                 /* failure exit */
 553                                 advise(NULL, "%s exited with return code %d",
 554                                                 *ed, (status & 0xff00) >> 8);
 555                         }
 556                         status = -1;
 557                         break;
 558                 }
 559         }
 560
 561         /* remember which editor we used */
 562         edsave = mh_xstrdup(*ed);
 563
 564         *ed = NULL;
 565
 566         return status;
 567 }
 568
 569
 570 /*
 571 ** SEND
 572 */
 573
 574 static int
 575 sendfile(char **arg, char *file)
 576 {
 577         int vecp = 0;
 578         char *vec[MAXARGS];
 579
 580         context_save();
 581         fflush(stdout);
 582
 583         vec[vecp++] = "send";
 584         while (arg && *arg) {
 585                 vec[vecp++] = *arg++;
 586         }
 587         vec[vecp++] = file;
 588         vec[vecp] = NULL;
 589         execvp(*vec, vec);
 590         fprintf(stderr, "%s: unable to exec ", invo_name);
 591         perror("send");
 592         _exit(EX_OSERR);
 593 }
 594
 595
 596 /*
 597 ** refile msg into another folder
 598 */
 599 static int
 600 refile(char **arg, char *file)
 601 {
 602         int vecp = 0;
 603         char *vec[MAXARGS];
 604
 605         vec[vecp++] = "refile";
 606         vec[vecp++] = "-nolink";  /* override bad .mh_profile defaults */
 607         vec[vecp++] = "-file";
 608         vec[vecp++] = file;
 609
 610         while (arg && *arg) {
 611                 vec[vecp++] = *arg++;
 612         }
 613         vec[vecp] = NULL;
 614
 615         context_save();
 616         fflush(stdout);
 617
 618         return execprog(*vec, vec);
 619 }
 620
 621
 622 /*
 623 ** Remove the draft file
 624 */
 625
 626 static int
 627 removefile(char *drft)
 628 {
 629         if (unlink(drft) == NOTOK)
 630                 adios(EX_IOERR, drft, "unable to unlink");
 631
 632         return OK;
 633 }