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

   1
   2 /*
   3  * msgchk.c -- check for mail
   4  *
   5  * $Id$
   6  */
   7
   8 #include <h/mh.h>
   9 #include <zotnet/mts/mts.h>
  10 #include <zotnet/tws/tws.h>
  11 #include <pwd.h>
  12
  13 #ifdef POP
  14 # include <h/popsbr.h>
  15 #endif
  16
  17 #ifdef HESIOD
  18 # include <hesiod.h>
  19 #endif
  20
  21 #ifndef POP
  22 # define POPminc(a) (a)
  23 #else
  24 # define POPminc(a)  0
  25 #endif
  26
  27 #ifndef RPOP
  28 # define RPOPminc(a) (a)
  29 #else
  30 # define RPOPminc(a)  0
  31 #endif
  32
  33 #ifndef APOP
  34 # define APOPminc(a) (a)
  35 #else
  36 # define APOPminc(a)  0
  37 #endif
  38
  39 static struct swit switches[] = {
  40 #define DATESW                   0
  41     { "date", 0 },
  42 #define NDATESW                  1
  43     { "nodate", 0 },
  44 #define NOTESW                   2
  45     { "notify type", 0 },
  46 #define NNOTESW                  3
  47     { "nonotify type", 0 },
  48 #define HOSTSW                   4
  49     { "host hostname", POPminc (-4) },
  50 #define USERSW                   5
  51     { "user username", POPminc (-4) },
  52 #define APOPSW                   6
  53     { "apop", APOPminc (-4) },
  54 #define NAPOPSW                  7
  55     { "noapop", APOPminc (-6) },
  56 #define RPOPSW                   8
  57     { "rpop", RPOPminc (-4) },
  58 #define NRPOPSW                  9
  59     { "norpop", RPOPminc (-6) },
  60 #define VERSIONSW               10
  61     { "version", 0 },
  62 #define HELPSW                  11
  63     { "help", 4 },
  64 #define SNOOPSW                 12
  65     { "snoop", -5 },
  66     { NULL, 0 }
  67 };
  68
  69 /*
  70  * Maximum numbers of users we can check (plus
  71  * one for the NULL vector at the end).
  72  */
  73 #define MAXVEC  51
  74
  75 #define NT_NONE 0x0
  76 #define NT_MAIL 0x1
  77 #define NT_NMAI 0x2
  78 #define NT_ALL  (NT_MAIL | NT_NMAI)
  79
  80 #define NONEOK  0x0
  81 #define UUCPOLD 0x1
  82 #define UUCPNEW 0x2
  83 #define UUCPOK  (UUCPOLD | UUCPNEW)
  84 #define MMDFOLD 0x4
  85 #define MMDFNEW 0x8
  86 #define MMDFOK  (MMDFOLD | MMDFNEW)
  87
  88
  89 /*
  90  * static prototypes
  91  */
  92 static int donote (char *, int);
  93 static int checkmail (char *, char *, int, int, int);
  94
  95 #ifdef POP
  96 static int remotemail (char *, char *, int, int, int, int);
  97 #endif
  98
  99
 100 int
 101 main (int argc, char **argv)
 102 {
 103     int datesw = 1, notifysw = NT_ALL;
 104     int rpop, status = 0;
 105     int snoop = 0, vecp = 0;
 106     uid_t uid;
 107     char *cp, *host = NULL, *user, buf[BUFSIZ];
 108     char **argp, **arguments, *vec[MAXVEC];
 109     struct passwd *pw;
 110
 111 #ifdef HESIOD
 112     struct hes_postoffice *po;
 113     char *tmphost;
 114 #endif
 115
 116 #ifdef LOCALE
 117     setlocale(LC_ALL, "");
 118 #endif
 119     invo_name = r1bindex (argv[0], '/');
 120
 121     /* read user profile/context */
 122     context_read();
 123
 124     mts_init (invo_name);
 125     uid = getuid ();
 126     user = getusername();
 127
 128     arguments = getarguments (invo_name, argc, argv, 1);
 129     argp = arguments;
 130
 131 #ifdef POP
 132     if ((cp = getenv ("MHPOPDEBUG")) && *cp)
 133         snoop++;
 134 #endif
 135
 136 #ifdef KPOP
 137     rpop = 1;
 138 #else
 139     rpop = 0;
 140 #endif
 141
 142     while ((cp = *argp++)) {
 143         if (*cp == '-') {
 144             switch (smatch (++cp, switches)) {
 145                 case AMBIGSW:
 146                     ambigsw (cp, switches);
 147                     done (1);
 148                 case UNKWNSW:
 149                     adios (NULL, "-%s unknown", cp);
 150
 151                 case HELPSW:
 152                     snprintf (buf, sizeof(buf), "%s [switches] [users ...]",
 153                         invo_name);
 154                     print_help (buf, switches, 1);
 155                     done (1);
 156                 case VERSIONSW:
 157                     print_version(invo_name);
 158                     done (1);
 159
 160                 case DATESW:
 161                     datesw++;
 162                     continue;
 163                 case NDATESW:
 164                     datesw = 0;
 165                     continue;
 166
 167                 case NOTESW:
 168                     if (!(cp = *argp++) || *cp == '-')
 169                         adios (NULL, "missing argument to %s", argp[-2]);
 170                     notifysw |= donote (cp, 1);
 171                     continue;
 172                 case NNOTESW:
 173                     if (!(cp = *argp++) || *cp == '-')
 174                         adios (NULL, "missing argument to %s", argp[-2]);
 175                     notifysw &= ~donote (cp, 0);
 176                     continue;
 177
 178                 case HOSTSW:
 179                     if (!(host = *argp++) || *host == '-')
 180                         adios (NULL, "missing argument to %s", argp[-2]);
 181                     continue;
 182                 case USERSW:
 183                     if (!(cp = *argp++) || *cp == '-')
 184                         adios (NULL, "missing argument to %s", argp[-2]);
 185                     if (vecp >= MAXVEC-1)
 186                         adios (NULL, "you can only check %d users at a time", MAXVEC-1);
 187                     else
 188                         vec[vecp++] = cp;
 189                     continue;
 190
 191                 case APOPSW:
 192                     rpop = -1;
 193                     continue;
 194                 case NAPOPSW:
 195                     rpop = 0;
 196                     continue;
 197
 198                 case RPOPSW:
 199                     rpop = 1;
 200                     continue;
 201                 case NRPOPSW:
 202                     rpop = 0;
 203                     continue;
 204
 205                 case SNOOPSW:
 206                     snoop++;
 207                     continue;
 208             }
 209         }
 210         if (vecp >= MAXVEC-1)
 211             adios (NULL, "you can only check %d users at a time", MAXVEC-1);
 212         else
 213             vec[vecp++] = cp;
 214     }
 215
 216 #ifdef POP
 217     /*
 218      * If -host is not specified by user
 219      */
 220     if (!host || !*host) {
 221 # ifdef HESIOD
 222         /*
 223          * Scheme is:
 224          *        use MAILHOST environment variable if present,
 225          *  else try Hesiod.
 226          *  If that fails, use the default (if any)
 227          *  provided by mts.conf in mts_init()
 228          */
 229         if ((tmphost = getenv("MAILHOST")) != NULL)
 230             pophost = tmphost;
 231         else if ((po = hes_getmailhost(vecp ? vec[0] : user)) != NULL &&
 232                 strcmp(po->po_type, "POP") == 0)
 233             pophost = po->po_host;
 234 # endif /* HESIOD */
 235         /*
 236          * If "pophost" is specified in mts.conf,
 237          * use it as default value.
 238          */
 239         if (pophost && *pophost)
 240             host = pophost;
 241     }
 242     if (!host || !*host)
 243         host = NULL;
 244     if (!host || rpop <= 0)
 245         setuid (uid);
 246 #endif /* POP */
 247
 248     if (vecp != 0)
 249         vec[vecp] = NULL;
 250
 251 #ifdef POP
 252     if (host) {
 253         if (vecp == 0) {
 254             status = remotemail (host, user, rpop, notifysw, 1, snoop);
 255         } else {
 256             for (vecp = 0; vec[vecp]; vecp++)
 257                 status += remotemail (host, vec[vecp], rpop, notifysw, 0, snoop);
 258         }
 259     } else {
 260 #endif /* POP */
 261
 262     if (vecp == 0) {
 263         char *home;
 264
 265         home = (uid = geteuid()) ? home = getenv ("HOME") : NULL;
 266         if (home == NULL) {
 267             pw = getpwnam (user);
 268             if (pw == NULL)
 269                 adios (NULL, "unable to get information about user");
 270             if (home == NULL)
 271                 home = pw->pw_dir;
 272         }
 273         status = checkmail (user, home, datesw, notifysw, 1);
 274     } else {
 275         for (vecp = 0; vec[vecp]; vecp++) {
 276             if ((pw = getpwnam (vec[vecp])))
 277                 status += checkmail (pw->pw_name, pw->pw_dir, datesw, notifysw, 0);
 278             else
 279                 advise (NULL, "no such user as %s", vec[vecp]);
 280         }
 281     }
 282 #ifdef POP
 283     }           /* host == NULL */
 284 #endif
 285
 286     done (status);
 287 }
 288
 289
 290 static struct swit ntswitches[] = {
 291 #define NALLSW     0
 292     { "all", 0 },
 293 #define NMAISW     1
 294     { "mail", 0 },
 295 #define NNMAISW    2
 296     { "nomail", 0 },
 297     { NULL, 0 }
 298 };
 299
 300
 301 static int
 302 donote (char *cp, int ntflag)
 303 {
 304     switch (smatch (cp, ntswitches)) {
 305         case AMBIGSW:
 306             ambigsw (cp, ntswitches);
 307             done (1);
 308         case UNKWNSW:
 309             adios (NULL, "-%snotify %s unknown", ntflag ? "" : "no", cp);
 310
 311         case NALLSW:
 312             return NT_ALL;
 313         case NMAISW:
 314             return NT_MAIL;
 315         case NNMAISW:
 316             return NT_NMAI;
 317     }
 318 }
 319
 320
 321 static int
 322 checkmail (char *user, char *home, int datesw, int notifysw, int personal)
 323 {
 324     int mf, status;
 325     char buffer[BUFSIZ];
 326     struct stat st;
 327
 328     snprintf (buffer, sizeof(buffer), "%s/%s", mmdfldir[0] ? mmdfldir : home, mmdflfil[0] ? mmdflfil : user);
 329     if (datesw) {
 330         st.st_size = 0;
 331         st.st_atime = st.st_mtime = 0;
 332     }
 333     mf = (stat (buffer, &st) == NOTOK || st.st_size == 0) ? NONEOK
 334         : st.st_atime <= st.st_mtime ? MMDFNEW : MMDFOLD;
 335
 336     if ((mf & UUCPOK) || (mf & MMDFOK)) {
 337         if (notifysw & NT_MAIL) {
 338             printf (personal ? "You have " : "%s has ", user);
 339             if (mf & UUCPOK)
 340                 printf ("%s old-style bell", mf & UUCPOLD ? "old" : "new");
 341             if ((mf & UUCPOK) && (mf & MMDFOK))
 342                 printf (" and ");
 343             if (mf & MMDFOK)
 344                 printf ("%s%s", mf & MMDFOLD ? "old" : "new",
 345                         mf & UUCPOK ? " Internet" : "");
 346             printf (" mail waiting");
 347         } else {
 348             notifysw = 0;
 349         }
 350         status = 0;
 351     }
 352     else {
 353         if (notifysw & NT_NMAI)
 354             printf (personal ? "You don't %s%s" : "%s doesn't %s",
 355                     personal ? "" : user, "have any mail waiting");
 356         else
 357             notifysw = 0;
 358
 359         status = 1;
 360     }
 361
 362     if (notifysw)
 363         if (datesw && st.st_atime)
 364             printf ("; last read on %s", dtime (&st.st_atime, 1));
 365     if (notifysw)
 366         printf ("\n");
 367
 368     return status;
 369 }
 370
 371
 372 #ifdef POP
 373 extern char response[];
 374
 375 static int
 376 remotemail (char *host, char *user, int rpop, int notifysw, int personal, int snoop)
 377 {
 378     int nmsgs, nbytes, status;
 379     char *pass = NULL;
 380
 381     if (user == NULL)
 382         user = getusername ();
 383     if (rpop > 0)
 384         pass = getusername ();
 385     else
 386         ruserpass (host, &user, &pass);
 387
 388     /* open the POP connection */
 389     if (pop_init (host, user, pass, snoop, rpop) == NOTOK
 390             || pop_stat (&nmsgs, &nbytes) == NOTOK      /* check for messages  */
 391             || pop_quit () == NOTOK) {                  /* quit POP connection */
 392         advise (NULL, "%s", response);
 393         return 1;
 394     }
 395
 396     if (nmsgs) {
 397         if (notifysw & NT_MAIL) {
 398             printf (personal ? "You have " : "%s has ", user);
 399             printf ("%d message%s (%d bytes)",
 400                     nmsgs, nmsgs != 1 ? "s" : "", nbytes);
 401         }
 402         else
 403             notifysw = 0;
 404
 405         status = 0;
 406     } else {
 407         if (notifysw & NT_NMAI)
 408             printf (personal ? "You don't %s%s" : "%s doesn't %s",
 409                     personal ? "" : user, "have any mail waiting");
 410         else
 411             notifysw = 0;
 412         status = 1;
 413     }
 414     if (notifysw)
 415         printf (" on %s\n", host);
 416
 417     return status;
 418 }
 419 #endif /* POP */