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