usr/src/cmd/ypcmd/getlist.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 1992 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 <stdlib.h>
  39 #include "ypsym.h"
  40
  41 extern void free();
  42 extern char *strdup();
  43
  44 /*
  45  * Add a name to the list
  46  */
  47 static listofnames *
  48 newname(str)
  49 char *str;
  50 {
  51         listofnames *it;
  52         char *copy;
  53
  54         if (str == NULL)
  55                 return (NULL);
  56         copy = strdup(str);
  57         if (copy == NULL)
  58                 return (NULL);
  59         it = (listofnames *) malloc(sizeof (listofnames));
  60         if (it == NULL) {
  61                 free(copy);
  62                 return (NULL);
  63         }
  64         it->name = copy;
  65         it->nextname = NULL;
  66         return (it);
  67 }
  68
  69 /*
  70  * Assemble the list of names
  71  */
  72 listofnames *
  73 names(filename)
  74 char *filename;
  75 {
  76         listofnames *nameslist;
  77         listofnames *end;
  78         listofnames *nname;
  79         FILE *fyle;
  80         char line[256];
  81         char name[256];
  82
  83         fyle = fopen(filename, "r");
  84         if (fyle == NULL) {
  85                 return (NULL);
  86         }
  87         nameslist = NULL;
  88         while (fgets(line, sizeof (line), fyle)) {
  89                 if (line[0] == '#') continue;
  90                 if (line[0] == '\0') continue;
  91                 if (line[0] == '\n') continue;
  92                 nname = newname(line);
  93                 if (nname) {
  94                         if (nameslist == NULL) {
  95                                         nameslist = nname;
  96                                         end = nname;
  97                         } else {
  98                                 end->nextname = nname;
  99                                 end = nname;
 100                         }
 101                 } else
 102                         fprintf(stderr,
 103                 "file %s bad malloc %s\n", filename, name);
 104         }
 105         fclose(fyle);
 106         return (nameslist);
 107 }
 108
 109 void
 110 free_listofnames(locallist)
 111 listofnames *locallist;
 112 {
 113         listofnames *next = (listofnames *)NULL;
 114
 115         for (; locallist; locallist = next) {
 116                 next = locallist->nextname;
 117                 if (locallist->name)
 118                         free(locallist->name);
 119                 free((char *)locallist);
 120         }
 121 }
 122
 123
 124 #ifdef MAIN
 125 main(argc, argv)
 126 char **argv;
 127 {
 128         listofnames *list;
 129         list = names(argv[1]);
 130 #ifdef DEBUG
 131         print_listofnames(list);
 132 #endif
 133         free_listofnames(list);
 134 #ifdef DEBUG
 135         printf("Done\n");
 136 #endif
 137 }
 138 #endif
 139
 140 #ifdef DEBUG
 141 void
 142 print_listofnames(list)
 143 listofnames *list;
 144 {
 145         if (list == NULL)
 146                 printf("NULL\n");
 147         for (; list; list = list->nextname)
 148                 printf("%s\n", list->name);
 149 }
 150 #endif