diplodocus.org Git - nmh/blob - uip/conflict.c

   1
   2 /*
   3  * conflict.c -- check for conflicts in mail system
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13 #include <fcntl.h>
  14 #include <h/aliasbr.h>
  15 #include <h/mts.h>
  16 #include <h/utils.h>
  17 #include <grp.h>
  18 #include <pwd.h>
  19
  20 /*
  21  * maximum number of directories that can
  22  * be specified using -search switch.
  23  */
  24 #define NDIRS   100
  25
  26 /*
  27  * Add space for group names, 100 at a time
  28  */
  29 #define NGRPS   100
  30
  31 static struct swit switches[] = {
  32 #define MAILSW         0
  33     { "mail name", 0 },
  34 #define SERCHSW        1
  35     { "search directory", 0 },
  36 #define VERSIONSW      2
  37     { "version", 0 },
  38 #define HELPSW         3
  39     { "help", 0 },
  40     { NULL, 0 }
  41 };
  42
  43 static char *mail = NULL;
  44 static char *dirs[NDIRS];
  45 static FILE *out = NULL;
  46
  47 extern struct aka  *akahead;
  48 extern struct home *homehead;
  49
  50 /*
  51  * prototypes
  52  */
  53 void alias_files (int, char **);
  54 void pwd_names (void);
  55 void grp_names (void);
  56 void grp_members (void);
  57 void grp_ids (void);
  58 void maildrops (void);
  59 void mdrop(char *);
  60 int check (char *);
  61 void setup (void);
  62
  63
  64 int
  65 main (int argc, char **argv)
  66 {
  67     int akp = 0, dp = 0;
  68     char *cp, **argp, **arguments;
  69     char buf[BUFSIZ], *akv[50];
  70
  71 #ifdef LOCALE
  72     setlocale(LC_ALL, "");
  73 #endif
  74     invo_name = r1bindex (argv[0], '/');
  75
  76     /* foil search of user profile/context */
  77     if (context_foil (NULL) == -1)
  78         done (1);
  79
  80     mts_init (invo_name);
  81     arguments = getarguments (invo_name, argc, argv, 0);
  82     argp = arguments;
  83
  84     while ((cp = *argp++)) {
  85         if (*cp == '-') {
  86             switch (smatch (++cp, switches)) {
  87                 case AMBIGSW:
  88                     ambigsw (cp, switches);
  89                     done (1);
  90                 case UNKWNSW:
  91                     adios (NULL, "-%s unknown", cp);
  92
  93                 case HELPSW:
  94                     snprintf (buf, sizeof(buf), "%s [switches] [aliasfiles ...]",
  95                         invo_name);
  96                     print_help (buf, switches, 0);
  97                     done (1);
  98                 case VERSIONSW:
  99                     print_version(invo_name);
 100                     done (1);
 101
 102                 case MAILSW:
 103                     if (!(cp = *argp++) || *cp == '-')
 104                         adios (NULL, "missing argument to %s", argp[-2]);
 105                     if (mail)
 106                         adios (NULL, "mail to one address only");
 107                     else
 108                         mail = cp;
 109                     continue;
 110
 111                 case SERCHSW:
 112                     if (!(cp = *argp++) || *cp == '-')
 113                         adios (NULL, "missing argument to %s", argp[-2]);
 114                     if (dp >= NDIRS)
 115                         adios (NULL, "more than %d directories", NDIRS);
 116                     dirs[dp++] = cp;
 117                     continue;
 118             }
 119         }
 120         akv[akp++] = cp;
 121     }
 122
 123     if (akp == 0)
 124         akv[akp++] = AliasFile;
 125     if (!homehead)
 126         init_pw ();
 127     if (!mail)
 128         out = stdout;
 129     dirs[dp] = NULL;
 130
 131     alias_files (akp, akv);
 132     pwd_names ();
 133     grp_names ();
 134     grp_members ();
 135     grp_ids ();
 136 #ifdef  UCI
 137     ldr_names ();
 138     ldr_ship ();
 139 #endif  /* UCI */
 140     maildrops ();
 141
 142     done (0);
 143     return 1;
 144 }
 145
 146
 147 void
 148 alias_files (int akp, char **akv)
 149 {
 150     register int i, err;
 151
 152     for (i = 0; i < akp; i++)
 153         if ((err = alias (akv[i])) != AK_OK) {
 154             setup ();
 155             fprintf (out, "aliasing error in %s - %s\n", akv[i], akerror (err));
 156         }
 157         else
 158             if (out && !mail)
 159                 fprintf (out, "alias file %s is ok\n", akv[i]);
 160 }
 161
 162
 163 void
 164 pwd_names (void)
 165 {
 166     int hit = 0;
 167     register struct home *hm, *lm;
 168
 169     for (hm = homehead; hm; hm = hm->h_next)
 170         for (lm = hm->h_next; lm; lm = lm->h_next)
 171             if (strcmp (hm->h_name, lm->h_name) == 0) {
 172                 setup ();
 173                 fprintf (out, "duplicate user %s(uid=%d)\n",
 174                         lm->h_name, (int) lm->h_uid);
 175                 hit++;
 176             }
 177
 178     if (!hit && out && !mail)
 179         fprintf (out, "no duplicate users\n");
 180 }
 181
 182
 183 void
 184 grp_names (void)
 185 {
 186     int numgroups, maxgroups;
 187     int i, hit = 0;
 188     char **grps;
 189     struct group *gr;
 190
 191     /* allocate space NGRPS at a time */
 192     numgroups = 0;
 193     maxgroups = NGRPS;
 194     grps = (char **) mh_xmalloc((size_t) (maxgroups * sizeof(*grps)));
 195
 196     setgrent ();
 197     while ((gr = getgrent ())) {
 198         for (i = 0; i < numgroups; i++)
 199             if (!strcmp (grps[i], gr->gr_name)) {
 200                 setup ();
 201                 fprintf (out, "duplicate group %s(gid=%d)\n",
 202                         gr->gr_name, (int) gr->gr_gid);
 203                 hit++;
 204                 break;
 205             }
 206         if (i >= numgroups) {
 207             if (numgroups >= maxgroups) {
 208                 maxgroups += NGRPS;
 209                 grps = (char **) mh_xrealloc(grps,
 210                     (size_t) (maxgroups * sizeof(*grps)));
 211             }
 212             grps[numgroups++] = getcpy (gr->gr_name);
 213         }
 214     }
 215     endgrent ();
 216
 217     for (i = 0; i < numgroups; i++)
 218         free (grps[i]);
 219     free (grps);
 220
 221     if (!hit && out && !mail)
 222         fprintf (out, "no duplicate groups\n");
 223 }
 224
 225
 226 void
 227 grp_members (void)
 228 {
 229     register int hit = 0;
 230     register char **cp, **dp;
 231     register struct group *gr;
 232     register struct home  *hm;
 233
 234     setgrent ();
 235     while ((gr = getgrent ())) {
 236         for (cp = gr->gr_mem; *cp; cp++) {
 237             for (hm = homehead; hm; hm = hm->h_next)
 238                 if (!strcmp (*cp, hm->h_name))
 239                     break;
 240             if (hm == NULL) {
 241                 setup ();
 242                 fprintf (out, "group %s(gid=%d) has unknown member %s\n",
 243                         gr->gr_name, (int) gr->gr_gid, *cp);
 244                 hit++;
 245             } else {
 246                 hm->h_ngrps++;
 247             }
 248
 249             for (dp = cp + 1; *dp; dp++)
 250                 if (strcmp (*cp, *dp) == 0) {
 251                     setup ();
 252                     fprintf (out, "group %s(gid=%d) has duplicate member %s\n",
 253                             gr->gr_name, (int) gr->gr_gid, *cp);
 254                     hit++;
 255                 }
 256         }
 257     }
 258     endgrent ();
 259
 260     for (hm = homehead; hm; hm = hm->h_next)
 261         if (hm->h_ngrps > NGROUPS_MAX) {
 262             setup ();
 263             fprintf (out, "user %s is a member of %d groups (max %d)\n",
 264                     hm->h_name, hm->h_ngrps, NGROUPS_MAX);
 265             hit++;
 266         }
 267
 268     if (!hit && out && !mail)
 269         fprintf (out, "all group members accounted for\n");
 270 }
 271
 272
 273 void
 274 grp_ids (void)
 275 {               /* -DRAND not implemented at most places */
 276     register int hit = 0;
 277     register struct home *hm;
 278
 279     for (hm = homehead; hm; hm = hm->h_next)
 280         if (getgrgid (hm->h_gid) == NULL) {
 281             setup ();
 282             fprintf (out, "user %s(uid=%d) has unknown group-id %d\n",
 283                     hm->h_name, (int) hm->h_uid, (int) hm->h_gid);
 284             hit++;
 285         }
 286
 287     if (!hit && out && !mail)
 288         fprintf (out, "all group-id users accounted for\n");
 289 }
 290
 291
 292 void
 293 maildrops (void)
 294 {
 295     register int i;
 296
 297     if (mmdfldir && *mmdfldir)
 298         mdrop (mmdfldir);
 299     if (uucpldir && *uucpldir)
 300         mdrop (uucpldir);
 301     for (i = 0; dirs[i]; i++)
 302         mdrop (dirs[i]);
 303 }
 304
 305
 306 void
 307 mdrop(char *drop)
 308 {
 309     register int hit = 0;
 310     register struct dirent *dp;
 311     register DIR *dd = opendir (drop);
 312
 313     if (!dd) {
 314         setup ();
 315         fprintf (out, "unable to open maildrop area %s\n", drop);
 316         return;
 317     }
 318
 319     while ((dp = readdir (dd)))
 320         if (dp->d_name[0] != '.' && !check (dp->d_name)) {
 321             setup ();
 322             fprintf (out,
 323                     "there is a maildrop for the unknown user %s in %s\n",
 324                     dp->d_name, drop);
 325             hit++;
 326         }
 327
 328     closedir (dd);
 329     if (!hit && out && !mail)
 330         fprintf (out, "all maildrops accounted for in %s\n", drop);
 331 }
 332
 333
 334 int
 335 check (char *s)
 336 {
 337     register struct home *hm;
 338
 339     for (hm = homehead; hm; hm = hm->h_next)
 340         if (!strcmp (s, hm->h_name))
 341             return 1;
 342     return 0;
 343 }
 344
 345 void
 346 setup (void)
 347 {
 348     int fd, pd[2];
 349
 350     if (out)
 351         return;
 352
 353     if (mail) {
 354         if (pipe (pd) == NOTOK)
 355             adios ("pipe", "unable to");
 356
 357         switch (fork ()) {
 358             case NOTOK:
 359                 adios ("fork", "unable to");
 360
 361             case OK:
 362                 close (pd[1]);
 363                 if (pd[0] != 0) {
 364                     dup2 (pd[0], 0);
 365                     close (pd[0]);
 366                 }
 367                 if ((fd = open ("/dev/null", O_WRONLY)) != NOTOK)
 368                     if (fd != 1) {
 369                         dup2 (fd, 1);
 370                         close (fd);
 371                     }
 372                 execlp (mailproc, r1bindex (mailproc, '/'),
 373                         mail, "-subject", invo_name, NULL);
 374                 adios (mailproc, "unable to exec ");
 375
 376             default:
 377                 close (pd[0]);
 378                 out = fdopen (pd[1], "w");
 379                 fprintf (out, "%s: the following is suspicious\n\n",
 380                         invo_name);
 381         }
 382     }
 383 }
 384
 385 #ifdef UCI
 386 /*
 387  * UCI specific stuff for conflict
 388  */
 389
 390 /* taken from <grpldr.h> */
 391
 392 #define GLDRS   "/admin/etc/GroupLeaders"
 393
 394 struct grpldr {
 395     char *gl_name;
 396     char **gl_ldr;
 397 };
 398
 399 int setglent (), endglent ();
 400 struct grpldr *getglent (), *getglnam ();
 401
 402
 403 /* taken from the getglent() routines */
 404
 405 #define MAXGLS  100
 406
 407 static FILE *glp = NULL;
 408 static char line[BUFSIZ+1];
 409 static struct grpldr grpldr;
 410 static char *gl_ldr[MAXGLS + 1];
 411
 412
 413 setglent() {
 414     if (glp == NULL)
 415         glp = fopen (GLDRS, "r");
 416     else
 417         rewind (glp);
 418
 419     return (glp != NULL);
 420 }
 421
 422
 423 endglent() {
 424     if (glp != NULL) {
 425         fclose (glp);
 426         glp = NULL;
 427     }
 428
 429     return 1;
 430 }
 431
 432 struct grpldr  *getglent () {
 433     register char  *cp,
 434                   **q;
 435
 436     if (glp == NULL && !setglent ())
 437         return NULL;
 438     if ((cp = fgets (line, BUFSIZ, glp)) == NULL)
 439         return NULL;
 440
 441     grpldr.gl_name = cp;
 442     grpldr.gl_ldr = q = gl_ldr;
 443
 444     while (*cp) {
 445         while (*cp && !isspace (*cp))
 446             cp++;
 447         while (*cp && isspace (*cp))
 448             *cp++ = '\0';
 449         if (*cp == '\0')
 450             break;
 451         if (q < gl_ldr + MAXGLS)
 452             *q++ = cp;
 453         else
 454             break;
 455     }
 456     *q = NULL;
 457
 458     return (&grpldr);
 459 }
 460
 461 struct grpldr  *getglnam (name)
 462 char   *name;
 463 {
 464     register struct grpldr  *gl = NULL;
 465
 466     setglent ();
 467     while (gl = getglent ())
 468         if (strcmp (name, gl->gl_name) == 0)
 469             break;
 470     endglent ();
 471
 472     return gl;
 473 }
 474
 475 ldr_names () {
 476     register int     gp,
 477                      hit = 0;
 478     char   *gldrs[NGRPS];
 479     register struct grpldr  *gl;
 480
 481     gldrs[0] = NULL;
 482     setglent ();
 483     while (gl = getglent ()) {
 484         if (getgrnam (gl->gl_name) == NULL) {
 485             setup ();
 486             fprintf (out, "unknown group %s in group leaders file\n",
 487                     gl->gl_name);
 488             hit++;
 489         }
 490         for (gp = 0; gldrs[gp]; gp++)
 491             if (strcmp (gldrs[gp], gl->gl_name) == 0) {
 492                 setup ();
 493                 fprintf (out, "duplicate group %s in group leaders file\n",
 494                         gl->gl_name);
 495                 hit++;
 496                 break;
 497             }
 498         if (gldrs[gp] == NULL)
 499             if (gp < NGRPS) {
 500                 gldrs[gp++] = getcpy (gl->gl_name);
 501                 gldrs[gp] = NULL;
 502             }
 503             else {
 504                 setup ();
 505                 fprintf (out, "more than %d groups in group leaders file%s\n",
 506                         " (time to recompile)", NGRPS - 1);
 507                 hit++;
 508             }
 509     }
 510     endglent ();
 511
 512     for (gp = 0; gldrs[gp]; gp++)
 513         free (gldrs[gp]);
 514
 515     if (!hit && out && !mail)
 516         fprintf (out, "all groups in group leaders file accounted for\n");
 517 }
 518
 519
 520 ldr_ship () {
 521     register int     hit = 0;
 522     register char  **cp,
 523                    **dp;
 524     register struct grpldr  *gl;
 525
 526     setglent ();
 527     while (gl = getglent ())
 528         for (cp = gl->gl_ldr; *cp; cp++) {
 529             if (!check (*cp)) {
 530                 setup ();
 531                 fprintf (out, "group %s has unknown leader %s\n",
 532                         gl->gl_name, *cp);
 533                 hit++;
 534             }
 535
 536             for (dp = cp + 1; *dp; dp++)
 537                 if (strcmp (*cp, *dp) == 0) {
 538                     setup ();
 539                     fprintf (out, "group %s had duplicate leader %s\n",
 540                             gl->gl_name, *cp);
 541                     hit++;
 542                 }
 543         }
 544     endglent ();
 545
 546     if (!hit && out && !mail)
 547         fprintf (out, "all group leaders accounted for\n");
 548 }
 549 #endif  /* UCI */