diplodocus.org Git - nmh/blob - docs/historical/mh-6.8.5/mts/sendmail/RCS/hosts.c,v

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   9 date    92.12.15.00.20.22;      author jromine; state Exp;
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  14 date    92.01.31.21.37.07;      author jromine; state Exp;
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  19 date    90.04.05.15.30.14;      author sources; state Exp;
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  39 date    90.02.05.14.52.05;      author sources; state Exp;
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  50 @endif sugar
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  52 text
  53 @/* hosts.c - find out the official name of a host */
  54 #ifndef lint
  55 static char ident[] = "@@(#)$Id: hosts.c,v 1.6 1992/01/31 21:37:07 jromine Exp jromine $";
  56 #endif  /* lint */
  57
  58 /* LINTLIBRARY */
  59
  60 /* In the SendMail world, we really don't know what the valid hosts are.
  61    We could poke around in the sendmail.cf file, but that still isn't a
  62    guarantee.  As a result, we'll say that everything is a valid host, and
  63    let SendMail worry about it. */
  64
  65
  66 #include "../h/strings.h"
  67 #include <stdio.h>
  68 #include "../zotnet/mts.h"
  69 #include <ctype.h>
  70 #if     defined(BSD42) || defined(SOCKETS)
  71 #include <netdb.h>
  72 #endif  /* BSD42 or SOCKETS */
  73
  74
  75 #define NOTOK   (-1)
  76
  77
  78 static struct host {
  79     char   *h_name;
  80     char  **h_aliases;
  81     struct host   *h_next;
  82 }                   hosts;
  83
  84 char   *getcpy ();
  85
  86 static int      init_hs();
  87
  88 /* \f */
  89
  90 char   *OfficialName (name)
  91 register char   *name;
  92 {
  93     register char  *p;
  94     char   *q,
  95             site[BUFSIZ];
  96 #if     defined(BSD42) || defined(SOCKETS)
  97     register struct hostent *hp;
  98 #endif  /* BSD42 or SOCKETS */
  99     static char buffer[BUFSIZ];
 100     register char **r;
 101     register struct host   *h;
 102
 103     for (p = name, q = site; *p; p++, q++)
 104         *q = isupper (*p) ? tolower (*p) : *p;
 105     *q = 0;
 106     q = site;
 107
 108     if (uleq (LocalName (), site))
 109         return LocalName ();
 110
 111 #ifdef  BSD41A
 112     if (rhost (&q) != NOTOK) {
 113         (void) strcpy (buffer, q);
 114         free (q);
 115         return buffer;
 116     }
 117 #endif  /* BSD41A */
 118 #if     defined(BSD42) || defined(SOCKETS)
 119 #ifndef BIND
 120     sethostent (1);
 121 #endif
 122     if (hp = gethostbyname (q)) {
 123         (void) strcpy (buffer, hp -> h_name);
 124         return buffer;
 125     }
 126 #endif  /* BSD42 or SOCKETS */
 127
 128     if (hosts.h_name || init_hs ())
 129         for (h = hosts.h_next; h; h = h -> h_next)
 130             if (uleq (h -> h_name, q))
 131                 return h -> h_name;
 132             else
 133                 for (r = h -> h_aliases; *r; r++)
 134                     if (uleq (*r, q))
 135                         return h -> h_name;
 136
 137     (void) strcpy (buffer, site);
 138     return buffer;
 139 }
 140
 141 /* \f */
 142
 143 /* Use hostable as an exception file for those hosts that aren't on the
 144    Internet (listed in /etc/hosts).  These are usually PhoneNet and UUCP
 145    sites. */
 146
 147
 148 #define NALIASES        50
 149
 150 static int  init_hs () {
 151     register char  *cp,
 152                    *dp,
 153                   **q,
 154                   **r;
 155     char    buffer[BUFSIZ],
 156            *aliases[NALIASES];
 157     register struct host   *h;
 158     register FILE  *fp;
 159
 160     if ((fp = fopen (hostable, "r")) == NULL)
 161         return 0;
 162
 163     h = &hosts;
 164     while (fgets (buffer, sizeof buffer, fp) != NULL) {
 165         if (cp = index (buffer, '#'))
 166             *cp = 0;
 167         if (cp = index (buffer, '\n'))
 168             *cp = 0;
 169         for (cp = buffer; *cp; cp++)
 170             if (isspace (*cp))
 171                 *cp = ' ';
 172         for (cp = buffer; isspace (*cp); cp++)
 173             continue;
 174         if (*cp == 0)
 175             continue;
 176
 177         q = aliases;
 178         if (cp = index (dp = cp, ' ')) {
 179             *cp = 0;
 180             for (cp++; *cp; cp++) {
 181                 while (isspace (*cp))
 182                     cp++;
 183                 if (*cp == 0)
 184                     break;
 185                 if (cp = index (*q++ = cp, ' '))
 186                     *cp = 0;
 187                 else
 188                     break;
 189                 if (q >= aliases + NALIASES)
 190                     break;
 191             }
 192         }
 193
 194         *q = 0;
 195
 196         h -> h_next = (struct host *) calloc (1, sizeof *h);
 197         h = h -> h_next;
 198         h -> h_name = getcpy (dp);
 199         r = h -> h_aliases =
 200                 (char **) calloc ((unsigned) (q - aliases + 1), sizeof *q);
 201         for (q = aliases; *q; q++)
 202             *r++ = getcpy (*q);
 203         *r = 0;
 204     }
 205
 206     (void) fclose (fp);
 207     return 1;
 208 }
 209 @
 210
 211
 212 1.6
 213 log
 214 @kerberos
 215 @
 216 text
 217 @d3 2
 218 a4 2
 219 static char ident[] = "@@(#)$Id: hosts.c,v 1.5 1990/04/05 15:30:14 sources Exp jromine $";
 220 #endif  lint
 221 d20 1
 222 a20 1
 223 #endif  BSD42 or SOCKETS
 224 d46 1
 225 a46 1
 226 #endif  BSD42 or SOCKETS
 227 d65 1
 228 a65 1
 229 #endif  BSD41A
 230 d74 1
 231 a74 1
 232 #endif  BSD42 or SOCKETS
 233 @
 234
 235
 236 1.5
 237 log
 238 @add ID
 239 @
 240 text
 241 @d3 1
 242 a3 1
 243 static char ident[] = "@@(#)$Id:$";
 244 d53 1
 245 a53 1
 246     *q = NULL;
 247 d114 1
 248 a114 1
 249             *cp = NULL;
 250 d116 1
 251 a116 1
 252             *cp = NULL;
 253 d122 1
 254 a122 1
 255         if (*cp == NULL)
 256 d127 1
 257 a127 1
 258             *cp = NULL;
 259 d131 1
 260 a131 1
 261                 if (*cp == NULL)
 262 d134 1
 263 a134 1
 264                     *cp = NULL;
 265 d142 1
 266 a142 1
 267         *q = NULL;
 268 d151 1
 269 a151 1
 270         *r = NULL;
 271 @
 272
 273
 274 1.4
 275 log
 276 @add ID
 277 @
 278 text
 279 @d3 1
 280 a3 1
 281 static char ident[] = "$Id:";
 282 @
 283
 284
 285 1.3
 286 log
 287 @ANSI Compilance
 288 @
 289 text
 290 @d2 3
 291 @
 292
 293
 294 1.2
 295 log
 296 @SOCKETS
 297 @
 298 text
 299 @d31 2
 300 @
 301
 302
 303 1.1
 304 log
 305 @Initial revision
 306 @
 307 text
 308 @d15 1
 309 a15 1
 310 #ifdef  BSD42
 311 d17 1
 312 a17 1
 313 #endif  BSD42
 314 d39 1
 315 a39 1
 316 #ifdef  BSD42
 317 d41 1
 318 a41 1
 319 #endif  BSD42
 320 d61 1
 321 a61 1
 322 #ifdef  BSD42
 323 d69 1
 324 a69 1
 325 #endif  BSD42
 326 @