usr/src/cmd/ypcmd/yp_getalias.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  *
  22  * Copyright 1996 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
  27 /*        All Rights Reserved   */
  28
  29 /*
  30  * Portions of this source code were derived from Berkeley
  31  * under license from the Regents of the University of
  32  * California.
  33  */
  34
  35 #pragma ident   "%Z%%M% %I%     %E% SMI"
  36
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <sys/types.h>
  40 #include <sys/statvfs.h>
  41 #include "ypsym.h"
  42 /* this is 14 less the space for temps pids and .pag more or less */
  43
  44 #ifdef DEBUG
  45 #define YPDBDIR         "/var/ypnew"
  46 #define ALIASLIST       "/var/ypnew/aliases"
  47 #else
  48 #define YPDBDIR         "/var/yp"
  49 #define ALIASLIST       "/var/yp/aliases"
  50 #endif
  51 #define issep(c) (c == ' ' || c == '\t')
  52
  53 #ifdef SYSVCONFIG
  54 #define isvar_sysv() (wasitsysv)
  55
  56 static int wasitsysv = TRUE;
  57 static int first_time = TRUE;
  58 static listofnames *list = NULL;
  59 #endif
  60
  61 void sysv_exit();
  62 extern listofnames *names();
  63 extern void exit();
  64 extern void free_listofnames();
  65
  66 /*
  67  * Setup alias file, check /var/yp filesystem type
  68  * Note: The *never* checks for aliases under Solaris, so there is no need
  69  *       for this function.  As of 1.1 beta 4, I will ifdef it out (cause
  70  *       you never know...).  Should go away completely soon.
  71  */
  72
  73 #ifdef SYSVCONFIG
  74 void
  75 sysvconfig(void)
  76 {
  77         struct statvfs statbuf;
  78
  79         sigset(SIGCHLD, SIG_IGN);
  80         /*
  81          * if neccesary free previous list, then read in aliaslist
  82          */
  83
  84         if (!first_time)
  85                 free_listofnames(list);
  86         else
  87                 first_time = FALSE;
  88
  89         list = names(ALIASLIST);
  90
  91         /*
  92          *      Check if YP database directory is in a system v filesystem
  93          */
  94
  95         if (statvfs(YPDBDIR, &statbuf) != 0) {
  96                 fprintf(stderr, "Cannot stat %s\n", YPDBDIR);
  97                 exit(-1);
  98         } else {
  99                 /* if (strcmp(statbuf.f_basetype,"s5")) (doesn't work in k13) */
 100                 if (statbuf.f_namemax == 14)
 101                         wasitsysv = TRUE;
 102                 else
 103                         wasitsysv = FALSE;
 104         }
 105         sigset(SIGCHLD, (void (*)())sysvconfig);
 106 }
 107 #endif
 108
 109 /*
 110  * Match key to alias
 111  */
 112 int
 113 yp_getalias(key, key_alias, maxlen)
 114         char *key;
 115         char *key_alias;
 116         int maxlen;
 117 {
 118         listofnames *entry;
 119         char *longname;
 120         char *alias;
 121         char name[256];
 122
 123 #ifndef SYSVCONFIG
 124         strcpy(key_alias, key);
 125         return (0);
 126 #else
 127         /* sysvconfig must be run before this routine */
 128         if (key == NULL || first_time)
 129                 return (-1);
 130
 131         if (!isvar_sysv()) {
 132                 strcpy(key_alias, key);
 133                 return (0);
 134         }
 135
 136         for (entry = list, strcpy(name, entry->name); entry;
 137                 entry = entry->nextname, strcpy(name, entry->name)) {
 138
 139                 longname = strtok(name, " \t");
 140                 alias = strtok(NULL, " \t\n");
 141                 if (longname == NULL || alias == NULL) {
 142                         continue;
 143                 }
 144                 if (strcmp(longname, key) == 0) {
 145                         if ((int)strlen(alias) > (maxlen)) {
 146                                 strncpy(key_alias, alias, (maxlen));
 147                                 key_alias[maxlen] = '\0';
 148                         } else {
 149                                 strcpy(key_alias, alias);
 150                         }
 151                         return (0);
 152                 }
 153         }
 154         /* alias not found */
 155         return (-1);
 156 #endif
 157 }
 158
 159 /*
 160  * Match alias to key
 161  */
 162 int
 163 yp_getkey(key_alias, key, maxlen)
 164         char *key_alias;
 165         char *key;
 166         int maxlen;
 167 {
 168         listofnames *entry;
 169         char *longname;
 170         char *alias;
 171         char name[256];
 172
 173 #ifndef SYSVCONFIG
 174         strcpy(key, key_alias);
 175         return (0);
 176 #else
 177         if (key_alias == NULL || first_time) {
 178                 return (-1);
 179         }
 180
 181         if (!isvar_sysv()) {
 182                 strcpy(key, key_alias);
 183                 return (0);
 184         }
 185
 186         for (entry = list, strcpy(name, entry->name);
 187                 entry; entry = entry->nextname, strcpy(name, entry->name)) {
 188
 189                 longname = strtok(name, " \t");
 190                 alias = strtok(NULL, " \t\n");
 191                 if (alias == NULL || longname == NULL) {
 192                         continue;
 193                 }
 194                 if ((strcmp(alias, key_alias) == 0) ||
 195                     (strncmp(alias, key_alias, maxlen) == 0)) {
 196                         strcpy(key, longname);
 197                         return (0);
 198                 }
 199         }
 200         /* key not found */
 201         return (-1);
 202 #endif
 203 }