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", 0 },
  70 #define LISTSW  3
  71         { "list", 0 },
  72 #define SENDSW  4
  73         { "send [<switches>]", 0 },
  74 #define PUSHSW  5
  75         { "push [<switches>]", 0 },
  76 #define QUITSW  6
  77         { "quit", 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                         /* display the msg being replied to or distributed */
 221                         if (msgnam) {
 222                                 snprintf(buf, sizeof buf, "%s '%s'",
 223                                                 lproc, msgnam);
 224                                 system(buf);
 225                         } else {
 226                                 advise(NULL, "no alternate message to display");
 227                         }
 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                         snprintf(buf, sizeof buf, "%s '%s'", lproc, drft);
 242                         system(buf);
 243                         break;
 244
 245                 case QUITSW:
 246                         /* quit */
 247                         if (stat(drft, &st) != NOTOK) {
 248                                 advise(NULL, "draft left on %s", drft);
 249                         }
 250                         done(1);
 251
 252                 case DELETESW:
 253                         /* Delete draft and exit */
 254                         removefile(drft);
 255                         done(1);
 256
 257                 case PUSHSW:
 258                         /* Send draft in background */
 259                         if (sendfile(++argp, drft, 1))
 260                                 done(1);
 261                         break;
 262
 263                 case SENDSW:
 264                         /* Send draft */
 265                         sendfile(++argp, drft, 0);
 266                         break;
 267
 268                 case REFILEOPT:
 269                         /* Refile the draft */
 270                         if (refile(++argp, drft) == 0)
 271                                 done(0);
 272                         break;
 273
 274                 case CDCMDSW:
 275                         /*
 276                         ** Change the working directory for attachments
 277                         **
 278                         ** Run the directory through the user's shell
 279                         ** so that we can take advantage of any syntax
 280                         ** that the user is accustomed to.  Read back
 281                         ** the absolute path.
 282                         */
 283
 284                         if (*(argp+1) == NULL) {
 285                                 sprintf(buf, "$SHELL -c \"cd;pwd\"");
 286                         } else {
 287                                 writesomecmd(buf, BUFSIZ, "cd", "pwd", argp);
 288                         }
 289                         if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
 290                                 fgets(cwd, sizeof (cwd), f);
 291
 292                                 if (strchr(cwd, '\n') != NULL)
 293                                                 *strchr(cwd, '\n') = '\0';
 294
 295                                 pclose(f);
 296                         } else {
 297                                 advise("popen", "could not get directory");
 298                         }
 299
 300                         break;
 301
 302                 case PWDCMDSW:
 303                         /* Print the working directory for attachments */
 304                         printf("%s\n", cwd);
 305                         break;
 306
 307                 case LSCMDSW:
 308                         /*
 309                         ** List files in the current attachment working
 310                         ** directory
 311                         **
 312                         ** Use the user's shell so that we can take
 313                         ** advantage of any syntax that the user is
 314                         ** accustomed to.
 315                         */
 316                         writelscmd(buf, sizeof(buf), argp);
 317                         system_in_dir(cwd, buf);
 318                         break;
 319
 320                 case ALISTCMDSW:
 321                         /*
 322                         ** List attachments on current draft.  Options are:
 323                         **
 324                         ** -l    long listing (full path names)
 325                         ** -n    numbers listing
 326                         */
 327
 328                         l = NULL;
 329                         n = 0;
 330
 331                         while (*++argp != NULL) {
 332                                 if (strcmp(*argp, "-l") == 0)
 333                                         l = "/";
 334
 335                                 else if (strcmp(*argp, "-n") == 0)
 336                                         n = 1;
 337
 338                                 else if (strcmp(*argp, "-ln") == 0 ||
 339                                                 strcmp(*argp, "-nl") == 0) {
 340                                         l = "/";
 341                                         n = 1;
 342                                 } else {
 343                                         n = -1;
 344                                         break;
 345                                 }
 346                         }
 347
 348                         if (n == -1)
 349                                 advise(NULL, "usage is alist [-ln].");
 350
 351                         else
 352                                 annolist(drft, attach_hdr, l, n);
 353
 354                         break;
 355
 356                 case ATTACHCMDSW:
 357                         /*
 358                         ** Attach files to current draft.
 359                         */
 360
 361                         if (*(argp+1) == NULL) {
 362                                 advise(NULL, "attach command requires file argument(s).");
 363                                 break;
 364                         }
 365
 366                         /*
 367                         ** Build a command line that causes the user's
 368                         ** shell to list the file name arguments.
 369                         ** This handles and wildcard expansion, tilde
 370                         ** expansion, etc.
 371                         */
 372                         writelscmd(buf, sizeof(buf), argp);
 373
 374                         /*
 375                         ** Read back the response from the shell,
 376                         ** which contains a number of lines with one
 377                         ** file name per line.  Remove off the newline.
 378                         ** Determine whether we have an absolute or
 379                         ** relative path name.  Prepend the current
 380                         ** working directory to relative path names.
 381                         ** Add the attachment annotation to the draft.
 382                         */
 383                         if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
 384                                 while (fgets(shell, sizeof (shell), f)
 385                                                 != NULL) {
 386                                         *(strchr(shell, '\n')) = '\0';
 387
 388                                         if (*shell == '/')
 389                                                 annotate(drft, attach_hdr,
 390                                                                 shell, 0,
 391                                                                 -2, 1, 0);
 392                                         else {
 393                                                 sprintf(file, "%s/%s", cwd,
 394                                                                 shell);
 395                                                 annotate(drft, attach_hdr,
 396                                                                 file, 0,
 397                                                                 -2, 1, 0);
 398                                         }
 399                                 }
 400
 401                                 pclose(f);
 402                         } else {
 403                                 advise("popen", "could not get file from shell");
 404                         }
 405
 406                         break;
 407
 408                 case DETACHCMDSW:
 409                         /*
 410                         ** Detach files from current draft.
 411                         **
 412                         ** Scan the arguments for a -n.  Mixed file
 413                         ** names and numbers aren't allowed, so this
 414                         ** catches a -n anywhere in the argument list.
 415                         */
 416
 417                         for (n = 0, arguments = argp + 1;
 418                                         *arguments != NULL;
 419                                         arguments++) {
 420                                 if (strcmp(*arguments, "-n") == 0) {
 421                                                 n = 1;
 422                                                 break;
 423                                 }
 424                         }
 425
 426                         /*
 427                         ** A -n was found so interpret the arguments as
 428                         ** attachment numbers.  Decrement any remaining
 429                         ** argument number that is greater than the one
 430                         ** just processed after processing each one so
 431                         ** that the numbering stays correct.
 432                         */
 433
 434                         if (n == 1) {
 435                                 for (arguments = argp + 1;
 436                                                 *arguments != NULL;
 437                                                 arguments++) {
 438                                         if (strcmp(*arguments, "-n") == 0)
 439                                                 continue;
 440
 441                                         if (**arguments != '\0') {
 442                                                 n = atoi(*arguments);
 443                                                 annotate(drft, attach_hdr,
 444                                                                 NULL, 0,
 445                                                                 n, 1, 0);
 446
 447                                                 for (argp = arguments + 1; *argp != NULL; argp++) {
 448                                                         if (atoi(*argp) > n) {
 449                                                                 if (atoi(*argp) == 1)
 450                                                                         *argp = "";
 451                                                                 else
 452                                                                         sprintf(*argp, "%d", atoi(*argp) - 1);
 453                                                         }
 454                                                 }
 455                                         }
 456                                 }
 457                         }
 458
 459                         /*
 460                         ** The arguments are interpreted as file names.
 461                         ** Run them through the user's shell for wildcard
 462                         ** expansion and other goodies.  Do this from
 463                         ** the current working directory if the argument
 464                         ** is not an absolute path name (does not begin
 465                         ** with a /).
 466                         **
 467                         ** We feed all the file names to the shell at
 468                         ** once, otherwise you can't provide a file name
 469                         ** with a space in it.
 470                         */
 471                         writelscmd(buf, sizeof(buf), argp);
 472                         if ((f = popen_in_dir(cwd, buf, "r")) != (FILE *)0) {
 473                                 while (fgets(shell, sizeof (shell), f)
 474                                                 != NULL) {
 475                                         *(strchr(shell, '\n')) = '\0';
 476                                         annotate(drft, attach_hdr, shell,
 477                                                         0, 0, 1, 0);
 478                                 }
 479                                 pclose(f);
 480                         } else {
 481                                 advise("popen", "could not get file from shell");
 482                         }
 483
 484                         break;
 485
 486                 default:
 487                         /* Unknown command */
 488                         advise(NULL, "say what?");
 489                         break;
 490                 }
 491         }
 492         /*NOTREACHED*/
 493 }
 494
 495
 496
 497 /*
 498 ** Build a command line of the form $SHELL -c "cd 'cwd'; cmd argp ... ;
 499 ** trailcmd".
 500 */
 501 static void
 502 writesomecmd(char *buf, int bufsz, char *cmd, char *trailcmd, char **argp)
 503 {
 504         char *cp;
 505         /*
 506         ** Note that we do not quote -- the argp from the user
 507         ** is assumed to be quoted as they desire. (We can't treat
 508         ** it as pure literal as that would prevent them using ~,
 509         ** wildcards, etc.) The buffer produced by this function
 510         ** should be given to popen_in_dir() or system_in_dir() so
 511         ** that the current working directory is set correctly.
 512         */
 513         int ln = snprintf(buf, bufsz, "$SHELL -c \"%s", cmd);
 514         /*
 515         ** NB that some snprintf() return -1 on overflow rather than the
 516         ** new C99 mandated 'number of chars that would have been written'
 517         */
 518         /*
 519         ** length checks here and inside the loop allow for the
 520         ** trailing ';', trailcmd, '"' and NUL
 521         */
 522         int trailln = strlen(trailcmd) + 3;
 523         if (ln < 0 || ln + trailln > bufsz)
 524                 adios(NULL, "arguments too long");
 525
 526         cp = buf + ln;
 527
 528         while (*++argp != NULL) {
 529                 ln = strlen(*argp);
 530                 /* +1 for leading space */
 531                 if (ln + trailln + 1 > bufsz - (cp-buf))
 532                         adios(NULL, "arguments too long");
 533                 *cp++ = ' ';
 534                 memcpy(cp, *argp, ln+1);
 535                 cp += ln;
 536         }
 537         if (*trailcmd) {
 538                 *cp++ = ';';
 539                 strcpy(cp, trailcmd);
 540                 cp += trailln - 3;
 541         }
 542         *cp++ = '"';
 543         *cp = 0;
 544 }
 545
 546 /*
 547 ** Build a command line that causes the user's shell to list the file name
 548 ** arguments.  This handles and wildcard expansion, tilde expansion, etc.
 549 */
 550 static void
 551 writelscmd(char *buf, int bufsz, char **argp)
 552 {
 553         writesomecmd(buf, bufsz, "ls", "", argp);
 554 }
 555
 556 /*
 557 ** Like system(), but run the command in directory dir.
 558 ** This assumes the program is single-threaded!
 559 */
 560 static int
 561 system_in_dir(const char *dir, const char *cmd)
 562 {
 563         char olddir[BUFSIZ];
 564         int r;
 565         if (getcwd(olddir, sizeof(olddir)) == 0)
 566                 adios("getcwd", "could not get working directory");
 567         if (chdir(dir) != 0)
 568                 adios("chdir", "could not change working directory");
 569         r = system(cmd);
 570         if (chdir(olddir) != 0)
 571                 adios("chdir", "could not change working directory");
 572         return r;
 573 }
 574
 575 /* ditto for popen() */
 576 static FILE*
 577 popen_in_dir(const char *dir, const char *cmd, const char *type)
 578 {
 579         char olddir[BUFSIZ];
 580         FILE *f;
 581         if (getcwd(olddir, sizeof(olddir)) == 0)
 582                 adios("getcwd", "could not get working directory");
 583         if (chdir(dir) != 0)
 584                 adios("chdir", "could not change working directory");
 585         f = popen(cmd, type);
 586         if (chdir(olddir) != 0)
 587                 adios("chdir", "could not change working directory");
 588         return f;
 589 }
 590
 591
 592 /*
 593 ** EDIT
 594 */
 595
 596 static int  reedit = 0;  /* have we been here before? */
 597 static char *edsave = NULL;  /* the editor we used previously */
 598
 599
 600 static int
 601 editfile(char **ed, char **arg, char *file, int use, struct msgs *mp,
 602         char *altmsg, char *cwd, int save_editor)
 603 {
 604         int pid, status, vecp;
 605         char altpath[BUFSIZ], linkpath[BUFSIZ];
 606         char *cp, *vec[MAXARGS];
 607         struct stat st;
 608
 609 #ifdef HAVE_LSTAT
 610         int slinked = 0;
 611 #endif /* HAVE_LSTAT */
 612
 613         /* Was there a previous edit session? */
 614         if (reedit) {
 615                 if (!*ed) {  /* no explicit editor */
 616                         *ed = edsave;  /* so use the previous one */
 617                         if ((cp = mhbasename(*ed)) == NULL)
 618                                 cp = *ed;
 619
 620                         /* unless we've specified it via "editor-next" */
 621                         cp = concat(cp, "-next", NULL);
 622                         if ((cp = context_find(cp)) != NULL)
 623                                 *ed = cp;
 624                 }
 625         } else {
 626                 /* set initial editor */
 627                 if (*ed == NULL && (*ed = context_find("editor")) == NULL)
 628                         *ed = defaulteditor;
 629         }
 630
 631         if (altmsg) {
 632                 if (mp == NULL || *altmsg == '/' || cwd == NULL)
 633                         strncpy(altpath, altmsg, sizeof(altpath));
 634                 else
 635                         snprintf(altpath, sizeof(altpath), "%s/%s",
 636                                         mp->foldpath, altmsg);
 637                 if (cwd == NULL)
 638                         strncpy(linkpath, altmsglink, sizeof(linkpath));
 639                 else
 640                         snprintf(linkpath, sizeof(linkpath), "%s/%s",
 641                                         cwd, altmsglink);
 642         }
 643
 644         if (altmsg) {
 645                 unlink(linkpath);
 646 #ifdef HAVE_LSTAT
 647                 if (link(altpath, linkpath) == NOTOK) {
 648                         symlink(altpath, linkpath);
 649                         slinked = 1;
 650                 } else {
 651                         slinked = 0;
 652                 }
 653 #else /* not HAVE_LSTAT */
 654                 link(altpath, linkpath);
 655 #endif /* not HAVE_LSTAT */
 656         }
 657
 658         context_save();  /* save the context file */
 659         fflush(stdout);
 660
 661         switch (pid = fork()) {
 662         case NOTOK:
 663                 advise("fork", "unable to");
 664                 status = NOTOK;
 665                 break;
 666
 667         case OK:
 668                 if (cwd)
 669                         chdir(cwd);
 670                 if (altmsg) {
 671                         if (mp)
 672                                 m_putenv("mhfolder", mp->foldpath);
 673                         m_putenv("editalt", altpath);
 674                 }
 675
 676                 vecp = 0;
 677                 vec[vecp++] = mhbasename(*ed);
 678                 if (arg)
 679                         while (*arg)
 680                                 vec[vecp++] = *arg++;
 681                 vec[vecp++] = file;
 682                 vec[vecp] = NULL;
 683
 684                 execvp(*ed, vec);
 685                 fprintf(stderr, "unable to exec ");
 686                 perror(*ed);
 687                 _exit(-1);
 688
 689         default:
 690                 if ((status = pidwait(pid, NOTOK))) {
 691                         if (((status & 0xff00) != 0xff00)
 692                                 && (!reedit || (status & 0x00ff))) {
 693                                 if (!use && (status & 0xff00) && (rename(file, cp = m_backup (file)) != NOTOK)) {
 694                                         advise(NULL, "problems with edit--draft left in %s", cp);
 695                                 } else {
 696                                         advise(NULL, "problems with edit--%s preserved", file);
 697                                 }
 698                         }
 699                         status = -2;  /* maybe "reedit ? -2 : -1"? */
 700                         break;
 701                 }
 702
 703                 reedit++;
 704 #ifdef HAVE_LSTAT
 705                 if (altmsg && mp && !is_readonly(mp) && (slinked ?
 706                                 lstat (linkpath, &st) != NOTOK &&
 707                                 S_ISREG(st.st_mode) &&
 708                                 copyf(linkpath, altpath) == NOTOK :
 709                                 stat(linkpath, &st) != NOTOK &&
 710                                 st.st_nlink == 1 &&
 711                                 (unlink(altpath) == NOTOK ||
 712                                 link(linkpath, altpath) == NOTOK)))
 713                         advise(linkpath, "unable to update %s from", altmsg);
 714 #else /* HAVE_LSTAT */
 715                 if (altmsg && mp && !is_readonly(mp) &&
 716                                 stat(linkpath, &st) != NOTOK &&
 717                                 st.st_nlink == 1 &&
 718                                 (unlink(altpath) == NOTOK ||
 719                                 link(linkpath, altpath) == NOTOK))
 720                         advise(linkpath, "unable to update %s from", altmsg);
 721 #endif /* HAVE_LSTAT */
 722         }
 723
 724         /* normally, we remember which editor we used */
 725         if (save_editor)
 726                 edsave = getcpy(*ed);
 727
 728         *ed = NULL;
 729         if (altmsg)
 730                 unlink(linkpath);
 731
 732         return status;
 733 }
 734
 735
 736 #ifdef HAVE_LSTAT
 737 static int
 738 copyf(char *ifile, char *ofile)
 739 {
 740         int i, in, out;
 741         char buffer[BUFSIZ];
 742
 743         if ((in = open(ifile, O_RDONLY)) == NOTOK)
 744                 return NOTOK;
 745         if ((out = open(ofile, O_WRONLY | O_TRUNC)) == NOTOK) {
 746                 admonish(ofile, "unable to open and truncate");
 747                 close(in);
 748                 return NOTOK;
 749         }
 750
 751         while ((i = read(in, buffer, sizeof(buffer))) > OK)
 752                 if (write(out, buffer, i) != i) {
 753                         advise(ofile, "may have damaged");
 754                         i = NOTOK;
 755                         break;
 756                 }
 757
 758         close(in);
 759         close(out);
 760         return i;
 761 }
 762 #endif /* HAVE_LSTAT */
 763
 764
 765 /*
 766 ** SEND
 767 */
 768
 769 static int
 770 sendfile(char **arg, char *file, int pushsw)
 771 {
 772         pid_t child_id;
 773         int i, vecp;
 774         char *vec[MAXARGS];
 775
 776         context_save();  /* save the context file */
 777         fflush(stdout);
 778
 779         for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 780                 sleep(5);
 781         switch (child_id) {
 782         case NOTOK:
 783                 advise(NULL, "unable to fork, so sending directly...");
 784                 /* fall */
 785         case OK:
 786                 vecp = 0;
 787                 vec[vecp++] = invo_name;
 788                 if (pushsw)
 789                         vec[vecp++] = "-push";
 790                 if (arg)
 791                         while (*arg)
 792                                 vec[vecp++] = *arg++;
 793                 vec[vecp++] = file;
 794                 vec[vecp] = NULL;
 795
 796                 execvp(sendproc, vec);
 797                 fprintf(stderr, "unable to exec ");
 798                 perror(sendproc);
 799                 _exit(-1);
 800
 801         default:
 802                 if (pidwait(child_id, OK) == 0)
 803                         done(0);
 804                 return 1;
 805         }
 806 }
 807
 808
 809 /*
 810 ** Remove the draft file
 811 */
 812
 813 static int
 814 removefile(char *drft)
 815 {
 816         if (unlink(drft) == NOTOK)
 817                 adios(drft, "unable to unlink");
 818
 819         return OK;
 820 }