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 **  The inclusion of attachments is eased by
   9 **  using the header field name mechanism added to anno and send.
  10 **  The header field name for attachments is predefined.
  11 **
  12 **  Several commands have been added at the whatnow prompt:
  13 **
  14 **        cd [ directory ]        This option works just like the shell's
  15 **                                cd command and lets the user change the
  16 **                                directory from which attachments are
  17 **                                taken so that long path names are not
  18 **                                needed with every file.
  19 **
  20 **        ls [ ls-options ]       This option works just like the normal
  21 **                                ls command and exists to allow the user
  22 **                                to verify file names in the directory.
  23 **
  24 **        pwd                     This option works just like the normal
  25 **                                pwd command and exists to allow the user
  26 **                                to verify the directory.
  27 **
  28 **        attach files            This option attaches the named files to
  29 **                                the draft.
  30 **
  31 **        alist [-ln]             This option lists the attachments on the
  32 **                                draft.  -l gets long listings, -n gets
  33 **                                numbered listings.
  34 **
  35 **        detach files            This option removes attachments from the
  36 **        detach -n numbers       draft.  This can be done by file name or
  37 **                                by attachment number.
  38 */
  39
  40 #include <h/mh.h>
  41 #include <fcntl.h>
  42 #include <signal.h>
  43 #include <h/mime.h>
  44 #include <h/utils.h>
  45
  46 static struct swit whatnowswitches[] = {
  47 #define EDITRSW  0
  48         { "editor editor", 0 },
  49 #define NEDITSW  1
  50         { "noedit", 0 },
  51 #define PRMPTSW  2
  52         { "prompt string", 4 },
  53 #define VERSIONSW  3
  54         { "version", 0 },
  55 #define HELPSW  4
  56         { "help", 0 },
  57         { NULL, 0 }
  58 };
  59
  60 /*
  61 ** Options at the "whatnow" prompt
  62 */
  63 static struct swit aleqs[] = {
  64 #define EDITSW  0
  65         { "edit [<editor> <switches>]", 0 },
  66 #define REFILEOPT  1
  67         { "refile [<switches>] +folder", 0 },
  68 #define DISPSW  2
  69         { "display [<switches>]", 0 },
  70 #define LISTSW  3
  71         { "list [<switches>]", 0 },
  72 #define SENDSW  4
  73         { "send [<switches>]", 0 },
  74 #define PUSHSW  5
  75         { "push [<switches>]", 0 },
  76 #define QUITSW  6
  77         { "quit [-delete]", 0 },
  78 #define DELETESW  7
  79         { "delete", 0 },
  80 #define CDCMDSW  8
  81         { "cd [directory]", 0 },
  82 #define PWDCMDSW  9
  83         { "pwd", 0 },
  84 #define LSCMDSW  10
  85         { "ls", 0 },
  86 #define ATTACHCMDSW  11
  87         { "attach", 0 },
  88 #define DETACHCMDSW  12
  89         { "detach [-n]", 2 },
  90 #define ALISTCMDSW  13
  91         { "alist [-ln] ", 2 },
  92         { NULL, 0 }
  93 };
  94
  95 static char *myprompt = "\nWhat now? ";
  96
  97 /*
  98 ** static prototypes
  99 */
 100 static int editfile(char **, char **, char *, int, struct msgs *,
 101         char *, char *, int);
 102 static int sendfile(char **, char *, int);
 103 static int removefile(char *);
 104 static void writelscmd(char *, int, char **);
 105 static void writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp);
 106 static FILE* popen_in_dir(const char *dir, const char *cmd, const char *type);
 107 static int system_in_dir(const char *dir, const char *cmd);
 108
 109
 110 #ifdef HAVE_LSTAT
 111 static int copyf(char *, char *);
 112 #endif
 113
 114
 115 int
 116 main(int argc, char **argv)
 117 {
 118         int nedit = 0, use = 0;
 119         char *cp;
 120         char *ed = NULL, *drft = NULL, *msgnam = NULL;
 121         char buf[BUFSIZ], prompt[BUFSIZ];
 122         char **argp, **arguments;
 123         struct stat st;
 124         char cwd[MAXPATHLEN + 1];  /* current working directory */
 125         char file[MAXPATHLEN + 1];  /* file name buffer */
 126         char shell[MAXPATHLEN + 1];  /* shell response buffer */
 127         FILE *f;  /* read pointer for bgnd proc */
 128         char *l;  /* set on -l to alist  command */
 129         int n;  /* set on -n to alist command */
 130
 131 #ifdef LOCALE
 132         setlocale(LC_ALL, "");
 133 #endif
 134
 135         invo_name = mhbasename(argv[0]);
 136
 137         /* read user profile/context */
 138         context_read();
 139
 140         arguments = getarguments(invo_name, argc, argv, 1);
 141         argp = arguments;
 142
 143         /*
 144         ** Get the initial current working directory.
 145         */
 146
 147         if (getcwd(cwd, sizeof (cwd)) == NULL) {
 148                 adios("getcwd", "could not get working directory");
 149         }
 150
 151         while ((cp = *argp++)) {
 152                 if (*cp == '-') {
 153                         switch (smatch(++cp, whatnowswitches)) {
 154                         case AMBIGSW:
 155                                 ambigsw(cp, whatnowswitches);
 156                                 done(1);
 157                         case UNKWNSW:
 158                                 adios(NULL, "-%s unknown", cp);
 159
 160                         case HELPSW:
 161                                 snprintf(buf, sizeof(buf),
 162                                                 "%s [switches] [file]",
 163                                                 invo_name);
 164                                 print_help(buf, whatnowswitches, 1);
 165                                 done(1);
 166                         case VERSIONSW:
 167                                 print_version(invo_name);
 168                                 done(1);
 169
 170                         case EDITRSW:
 171                                 if (!(ed = *argp++) || *ed == '-')
 172                                         adios(NULL, "missing argument to %s",
 173                                                         argp[-2]);
 174                                 nedit = 0;
 175                                 continue;
 176                         case NEDITSW:
 177                                 nedit++;
 178                                 continue;
 179
 180                         case PRMPTSW:
 181                                 if (!(myprompt = *argp++) || *myprompt == '-')
 182                                         adios(NULL, "missing argument to %s",
 183                                                         argp[-2]);
 184                                 continue;
 185
 186                         }
 187                 }
 188                 if (drft)
 189                         adios(NULL, "only one draft at a time!");
 190                 else
 191                         drft = cp;
 192         }
 193
 194         if ((drft == NULL && (drft = getenv("mhdraft")) == NULL) || *drft == 0)
 195                 drft = getcpy(m_draft(seq_cur));
 196
 197         msgnam = (cp = getenv("mhaltmsg")) && *cp ? getcpy(cp) : NULL;
 198
 199         if ((cp = getenv("mhuse")) && *cp)
 200                 use = atoi(cp);
 201
 202         if (ed == NULL && ((ed = getenv("mheditor")) == NULL || *ed == 0)) {
 203                 ed = NULL;
 204                 nedit++;
 205         }
 206
 207         /* start editing the draft, unless -noedit was given */
 208         if (!nedit && editfile(&ed, NULL, drft, use, NULL, msgnam, NULL, 1)
 209                         < 0)
 210                 done(1);
 211
 212         snprintf(prompt, sizeof(prompt), myprompt, invo_name);
 213         for (;;) {
 214                 if (!(argp = getans(prompt, aleqs))) {
 215                         unlink(altmsglink);
 216                         done(1);
 217                 }
 218                 switch (smatch(*argp, aleqs)) {
 219                 case DISPSW:
 220                         /*
 221                         ** display the message being replied to,
 222                         ** or distributed
 223                         */
 224                         if (msgnam)
 225                                 showfile(++argp, msgnam);
 226                         else
 227                                 advise(NULL, "no alternate message to display");
 228                         break;
 229
 230                 case EDITSW:
 231                         /* Call an editor on the draft file */
 232                         if (*++argp)
 233                                 ed = *argp++;
 234                         if (editfile(&ed, argp, drft, NOUSE, NULL,
 235                                         msgnam, NULL, 1) == NOTOK)
 236                                 done(1);
 237                         break;
 238
 239                 case LISTSW:
 240                         /* display the draft file */
 241                         showfile(++argp, drft);
 242                         break;
 243
 244                 case QUITSW:
 245                         /* Quit, and possibly delete the draft */
 246                         if (*++argp && (*argp[0] == 'd' ||
 247                                 ((*argp)[0] == '-' && (*argp)[1] == 'd'))) {
 248                                 removefile(drft);
 249                         } else {
 250                                 if (stat(drft, &st) != NOTOK)
 251                                         advise(NULL, "draft left on %s", drft);
 252                         }
 253                         done(1);
 254
 255                 case DELETESW:
 256                         /* Delete draft and exit */
 257                         removefile(drft);
 258                         done(1);
 259
 260                 case PUSHSW:
 261                         /* Send draft in background */
 262                         if (sendfile(++argp, drft, 1))
 263                                 done(1);
 264                         break;
 265
 266                 case SENDSW:
 267                         /* Send draft */
 268                         sendfile(++argp, drft, 0);
 269                         break;
 270
 271                 case REFILEOPT:
 272                         /* Refile the draft */
 273                         if (refile(++argp, drft) == 0)
 274                                 done(0);
 275                         break;
 276
 277                 case CDCMDSW:
 278                         /*
 279                         ** Change the working directory for attachments
 280                         **
 281                         ** Run the directory through the user's shell
 282                         ** so that we can take advantage of any syntax
 283                         ** that the user is accustomed to.  Read back
 284                         ** the absolute path.
 285                         */
 286
 287                         if (*(argp+1) == NULL) {
 288                                 sprintf(buf, "$SHELL -c \"cd;pwd\"");
 289                         } else {
 290                                 writesomecmd(buf, BUFSIZ, "cd", "pwd", argp);
 291                         }
 292                         if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
 293                                 fgets(cwd, sizeof (cwd), f);
 294
 295                                 if (strchr(cwd, '\n') != NULL)
 296                                                 *strchr(cwd, '\n') = '\0';
 297
 298                                 pclose(f);
 299                         } else {
 300                                 advise("popen", "could not get directory");
 301                         }
 302
 303                         break;
 304
 305                 case PWDCMDSW:
 306                         /* Print the working directory for attachments */
 307                         printf("%s\n", cwd);
 308                         break;
 309
 310                 case LSCMDSW:
 311                         /*
 312                         ** List files in the current attachment working
 313                         ** directory
 314                         **
 315                         ** Use the user's shell so that we can take
 316                         ** advantage of any syntax that the user is
 317                         ** accustomed to.
 318                         */
 319                         writelscmd(buf, sizeof(buf), argp);
 320                         system_in_dir(cwd, buf);
 321                         break;
 322
 323                 case ALISTCMDSW:
 324                         /*
 325                         ** List attachments on current draft.  Options are:
 326                         **
 327                         ** -l    long listing (full path names)
 328                         ** -n    numbers listing
 329                         */
 330
 331                         l = NULL;
 332                         n = 0;
 333
 334                         while (*++argp != NULL) {
 335                                 if (strcmp(*argp, "-l") == 0)
 336                                         l = "/";
 337
 338                                 else if (strcmp(*argp, "-n") == 0)
 339                                         n = 1;
 340
 341                                 else if (strcmp(*argp, "-ln") == 0 ||
 342                                                 strcmp(*argp, "-nl") == 0) {
 343                                         l = "/";
 344                                         n = 1;
 345                                 } else {
 346                                         n = -1;
 347                                         break;
 348                                 }
 349                         }
 350
 351                         if (n == -1)
 352                                 advise(NULL, "usage is alist [-ln].");
 353
 354                         else
 355                                 annolist(drft, attach_hdr, l, n);
 356
 357                         break;
 358
 359                 case ATTACHCMDSW:
 360                         /*
 361                         ** Attach files to current draft.
 362                         */
 363
 364                         if (*(argp+1) == NULL) {
 365                                 advise(NULL, "attach command requires file argument(s).");
 366                                 break;
 367                         }
 368
 369                         /*
 370                         ** Build a command line that causes the user's
 371                         ** shell to list the file name arguments.
 372                         ** This handles and wildcard expansion, tilde
 373                         ** expansion, etc.
 374                         */
 375                         writelscmd(buf, sizeof(buf), argp);
 376
 377                         /*
 378                         ** Read back the response from the shell,
 379                         ** which contains a number of lines with one
 380                         ** file name per line.  Remove off the newline.
 381                         ** Determine whether we have an absolute or
 382                         ** relative path name.  Prepend the current
 383                         ** working directory to relative path names.
 384                         ** Add the attachment annotation to the draft.
 385                         */
 386                         if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
 387                                 while (fgets(shell, sizeof (shell), f)
 388                                                 != NULL) {
 389                                         *(strchr(shell, '\n')) = '\0';
 390
 391                                         if (*shell == '/')
 392                                                 annotate(drft, attach_hdr,
 393                                                                 shell, 1, 0,
 394                                                                 -2, 1);
 395                                         else {
 396                                                 sprintf(file, "%s/%s", cwd,
 397                                                                 shell);
 398                                                 annotate(drft, attach_hdr,
 399                                                                 file, 1, 0,
 400                                                                 -2, 1);
 401                                         }
 402                                 }
 403
 404                                 pclose(f);
 405                         } else {
 406                                 advise("popen", "could not get file from shell");
 407                         }
 408
 409                         break;
 410
 411                 case DETACHCMDSW:
 412                         /*
 413                         ** Detach files from current draft.
 414                         **
 415                         ** Scan the arguments for a -n.  Mixed file
 416                         ** names and numbers aren't allowed, so this
 417                         ** catches a -n anywhere in the argument list.
 418                         */
 419
 420                         for (n = 0, arguments = argp + 1;
 421                                         *arguments != NULL;
 422                                         arguments++) {
 423                                 if (strcmp(*arguments, "-n") == 0) {
 424                                                 n = 1;
 425                                                 break;
 426                                 }
 427                         }
 428
 429                         /*
 430                         ** A -n was found so interpret the arguments as
 431                         ** attachment numbers.  Decrement any remaining
 432                         ** argument number that is greater than the one
 433                         ** just processed after processing each one so
 434                         ** that the numbering stays correct.
 435                         */
 436
 437                         if (n == 1) {
 438                                 for (arguments = argp + 1;
 439                                                 *arguments != NULL;
 440                                                 arguments++) {
 441                                         if (strcmp(*arguments, "-n") == 0)
 442                                                 continue;
 443
 444                                         if (**arguments != '\0') {
 445                                                 n = atoi(*arguments);
 446                                                 annotate(drft, attach_hdr,
 447                                                                 NULL, 1, 0,
 448                                                                 n, 1);
 449
 450                                                 for (argp = arguments + 1; *argp != NULL; argp++) {
 451                                                         if (atoi(*argp) > n) {
 452                                                                 if (atoi(*argp) == 1)
 453                                                                         *argp = "";
 454                                                                 else
 455                                                                         sprintf(*argp, "%d", atoi(*argp) - 1);
 456                                                         }
 457                                                 }
 458                                         }
 459                                 }
 460                         }
 461
 462                         /*
 463                         ** The arguments are interpreted as file names.
 464                         ** Run them through the user's shell for wildcard
 465                         ** expansion and other goodies.  Do this from
 466                         ** the current working directory if the argument
 467                         ** is not an absolute path name (does not begin
 468                         ** with a /).
 469                         **
 470                         ** We feed all the file names to the shell at
 471                         ** once, otherwise you can't provide a file name
 472                         ** with a space in it.
 473                         */
 474                         writelscmd(buf, sizeof(buf), argp);
 475                         if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
 476                                 while (fgets(shell, sizeof (shell), f)
 477                                                 != NULL) {
 478                                         *(strchr(shell, '\n')) = '\0';
 479                                         annotate(drft, attach_hdr, shell,
 480                                                         1, 0, 0, 1);
 481                                 }
 482                                 pclose(f);
 483                         } else {
 484                                 advise("popen", "could not get file from shell");
 485                         }
 486
 487                         break;
 488
 489                 default:
 490                         /* Unknown command */
 491                         advise(NULL, "say what?");
 492                         break;
 493                 }
 494         }
 495         /*NOTREACHED*/
 496 }
 497
 498
 499
 500 /*
 501 ** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
 502 ** trailcmd".
 503 */
 504 static void
 505 writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
 506 {
 507         char *cp;
 508         /*
 509         ** Note that we do not quote -- the argp from the user
 510         ** is assumed to be quoted as they desire. (We can't treat
 511         ** it as pure literal as that would prevent them using ~,
 512         ** wildcards, etc.) The buffer produced by this function
 513         ** should be given to popen_in_dir() or system_in_dir() so
 514         ** that the current working directory is set correctly.
 515         */
 516         int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
 517         /*
 518         ** NB that some snprintf() return -1 on overflow rather than the
 519         ** new C99 mandated 'number of chars that would have been written'
 520         */
 521         /*
 522         ** length checks here and inside the loop allow for the
 523         ** trailing ';', trailcmd, '"' and NUL
 524         */
 525         int trailln = strlen(trailcmd) + 3;
 526         if (ln < 0 || ln + trailln > bufsz)
 527                 adios(NULL, "arguments too long");
 528
 529         cp = buf + ln;
 530
 531         while (*++argp != NULL) {
 532                 ln = strlen(*argp);
 533                 /* +1 for leading space */
 534                 if (ln + trailln + 1 > bufsz - (cp-buf))
 535                         adios(NULL, "arguments too long");
 536                 *cp++ = ' ';
 537                 memcpy(cp, *argp, ln+1);
 538                 cp += ln;
 539         }
 540         if (*trailcmd) {
 541                 *cp++ = ';';
 542                 strcpy(cp, trailcmd);
 543                 cp += trailln - 3;
 544         }
 545         *cp++ = '"';
 546         *cp = 0;
 547 }
 548
 549 /*
 550 ** Build a command line that causes the user's shell to list the file name
 551 ** arguments.  This handles and wildcard expansion, tilde expansion, etc.
 552 */
 553 static void
 554 writelscmd(char *buf, int bufsz, char **argp)
 555 {
 556         writesomecmd(buf, bufsz, "ls", "", argp);
 557 }
 558
 559 /*
 560 ** Like system(), but run the command in directory dir.
 561 ** This assumes the program is single-threaded!
 562 */
 563 static int
 564 system_in_dir(const char *dir, const char *cmd)
 565 {
 566         char olddir[BUFSIZ];
 567         int r;
 568         if (getcwd(olddir, sizeof(olddir)) == 0)
 569                 adios("getcwd", "could not get working directory");
 570         if (chdir(dir) != 0)
 571                 adios("chdir", "could not change working directory");
 572         r = system(cmd);
 573         if (chdir(olddir) != 0)
 574                 adios("chdir", "could not change working directory");
 575         return r;
 576 }
 577
 578 /* ditto for popen() */
 579 static FILE*
 580 popen_in_dir(const char *dir, const char *cmd, const char *type)
 581 {
 582         char olddir[BUFSIZ];
 583         FILE *f;
 584         if (getcwd(olddir, sizeof(olddir)) == 0)
 585                 adios("getcwd", "could not get working directory");
 586         if (chdir(dir) != 0)
 587                 adios("chdir", "could not change working directory");
 588         f = popen(cmd, type);
 589         if (chdir(olddir) != 0)
 590                 adios("chdir", "could not change working directory");
 591         return f;
 592 }
 593
 594
 595 /*
 596 ** EDIT
 597 */
 598
 599 static int  reedit = 0;  /* have we been here before? */
 600 static char *edsave = NULL;  /* the editor we used previously */
 601
 602
 603 static int
 604 editfile(char **ed, char **arg, char *file, int use, struct msgs *mp,
 605         char *altmsg, char *cwd, int save_editor)
 606 {
 607         int pid, status, vecp;
 608         char altpath[BUFSIZ], linkpath[BUFSIZ];
 609         char *cp, *vec[MAXARGS];
 610         struct stat st;
 611
 612 #ifdef HAVE_LSTAT
 613         int slinked = 0;
 614 #endif /* HAVE_LSTAT */
 615
 616         /* Was there a previous edit session? */
 617         if (reedit) {
 618                 if (!*ed) {  /* no explicit editor */
 619                         *ed = edsave;  /* so use the previous one */
 620                         if ((cp = mhbasename(*ed)) == NULL)
 621                                 cp = *ed;
 622
 623                         /* unless we've specified it via "editor-next" */
 624                         cp = concat(cp, "-next", NULL);
 625                         if ((cp = context_find(cp)) != NULL)
 626                                 *ed = cp;
 627                 }
 628         } else {
 629                 /* set initial editor */
 630                 if (*ed == NULL && (*ed = context_find("editor")) == NULL)
 631                         *ed = defaulteditor;
 632         }
 633
 634         if (altmsg) {
 635                 if (mp == NULL || *altmsg == '/' || cwd == NULL)
 636                         strncpy(altpath, altmsg, sizeof(altpath));
 637                 else
 638                         snprintf(altpath, sizeof(altpath), "%s/%s",
 639                                         mp->foldpath, altmsg);
 640                 if (cwd == NULL)
 641                         strncpy(linkpath, altmsglink, sizeof(linkpath));
 642                 else
 643                         snprintf(linkpath, sizeof(linkpath), "%s/%s",
 644                                         cwd, altmsglink);
 645         }
 646
 647         if (altmsg) {
 648                 unlink(linkpath);
 649 #ifdef HAVE_LSTAT
 650                 if (link(altpath, linkpath) == NOTOK) {
 651                         symlink(altpath, linkpath);
 652                         slinked = 1;
 653                 } else {
 654                         slinked = 0;
 655                 }
 656 #else /* not HAVE_LSTAT */
 657                 link(altpath, linkpath);
 658 #endif /* not HAVE_LSTAT */
 659         }
 660
 661         context_save();  /* save the context file */
 662         fflush(stdout);
 663
 664         switch (pid = fork()) {
 665         case NOTOK:
 666                 advise("fork", "unable to");
 667                 status = NOTOK;
 668                 break;
 669
 670         case OK:
 671                 if (cwd)
 672                         chdir(cwd);
 673                 if (altmsg) {
 674                         if (mp)
 675                                 m_putenv("mhfolder", mp->foldpath);
 676                         m_putenv("editalt", altpath);
 677                 }
 678
 679                 vecp = 0;
 680                 vec[vecp++] = mhbasename(*ed);
 681                 if (arg)
 682                         while (*arg)
 683                                 vec[vecp++] = *arg++;
 684                 vec[vecp++] = file;
 685                 vec[vecp] = NULL;
 686
 687                 execvp(*ed, vec);
 688                 fprintf(stderr, "unable to exec ");
 689                 perror(*ed);
 690                 _exit(-1);
 691
 692         default:
 693                 if ((status = pidwait(pid, NOTOK))) {
 694                         if (((status & 0xff00) != 0xff00)
 695                                 && (!reedit || (status & 0x00ff))) {
 696                                 if (!use && (status & 0xff00) && (rename(file, cp = m_backup (file)) != NOTOK)) {
 697                                         advise(NULL, "problems with edit--draft left in %s", cp);
 698                                 } else {
 699                                         advise(NULL, "problems with edit--%s preserved", file);
 700                                 }
 701                         }
 702                         status = -2;  /* maybe "reedit ? -2 : -1"? */
 703                         break;
 704                 }
 705
 706                 reedit++;
 707 #ifdef HAVE_LSTAT
 708                 if (altmsg && mp && !is_readonly(mp) && (slinked ?
 709                                 lstat (linkpath, &st) != NOTOK &&
 710                                 S_ISREG(st.st_mode) &&
 711                                 copyf(linkpath, altpath) == NOTOK :
 712                                 stat(linkpath, &st) != NOTOK &&
 713                                 st.st_nlink == 1 &&
 714                                 (unlink(altpath) == NOTOK ||
 715                                 link(linkpath, altpath) == NOTOK)))
 716                         advise(linkpath, "unable to update %s from", altmsg);
 717 #else /* HAVE_LSTAT */
 718                 if (altmsg && mp && !is_readonly(mp) &&
 719                                 stat(linkpath, &st) != NOTOK &&
 720                                 st.st_nlink == 1 &&
 721                                 (unlink(altpath) == NOTOK ||
 722                                 link(linkpath, altpath) == NOTOK))
 723                         advise(linkpath, "unable to update %s from", altmsg);
 724 #endif /* HAVE_LSTAT */
 725         }
 726
 727         /* normally, we remember which editor we used */
 728         if (save_editor)
 729                 edsave = getcpy(*ed);
 730
 731         *ed = NULL;
 732         if (altmsg)
 733                 unlink(linkpath);
 734
 735         return status;
 736 }
 737
 738
 739 #ifdef HAVE_LSTAT
 740 static int
 741 copyf(char *ifile, char *ofile)
 742 {
 743         int i, in, out;
 744         char buffer[BUFSIZ];
 745
 746         if ((in = open(ifile, O_RDONLY)) == NOTOK)
 747                 return NOTOK;
 748         if ((out = open(ofile, O_WRONLY | O_TRUNC)) == NOTOK) {
 749                 admonish(ofile, "unable to open and truncate");
 750                 close(in);
 751                 return NOTOK;
 752         }
 753
 754         while ((i = read(in, buffer, sizeof(buffer))) > OK)
 755                 if (write(out, buffer, i) != i) {
 756                         advise(ofile, "may have damaged");
 757                         i = NOTOK;
 758                         break;
 759                 }
 760
 761         close(in);
 762         close(out);
 763         return i;
 764 }
 765 #endif /* HAVE_LSTAT */
 766
 767
 768 /*
 769 ** SEND
 770 */
 771
 772 static int
 773 sendfile(char **arg, char *file, int pushsw)
 774 {
 775         pid_t child_id;
 776         int i, vecp;
 777         char *vec[MAXARGS];
 778
 779         context_save();  /* save the context file */
 780         fflush(stdout);
 781
 782         for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 783                 sleep(5);
 784         switch (child_id) {
 785         case NOTOK:
 786                 advise(NULL, "unable to fork, so sending directly...");
 787                 /* fall */
 788         case OK:
 789                 vecp = 0;
 790                 vec[vecp++] = invo_name;
 791                 if (pushsw)
 792                         vec[vecp++] = "-push";
 793                 if (arg)
 794                         while (*arg)
 795                                 vec[vecp++] = *arg++;
 796                 vec[vecp++] = file;
 797                 vec[vecp] = NULL;
 798
 799                 execvp(sendproc, vec);
 800                 fprintf(stderr, "unable to exec ");
 801                 perror(sendproc);
 802                 _exit(-1);
 803
 804         default:
 805                 if (pidwait(child_id, OK) == 0)
 806                         done(0);
 807                 return 1;
 808         }
 809 }
 810
 811
 812 /*
 813 ** Remove the draft file
 814 */
 815
 816 static int
 817 removefile(char *drft)
 818 {
 819         if (unlink(drft) == NOTOK)
 820                 adios(drft, "unable to unlink");
 821
 822         return OK;
 823 }