usr/src/cmd/sgs/link_audit/common/env.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28 #include <sys/types.h>
  29 #include <env.h>
  30
  31 static const char       *token = ":";
  32
  33 void
  34 build_env_list(Elist **list, const char *env)
  35 {
  36         char    *envstr;
  37         char    *tok;
  38         char    *lasts;
  39
  40         if ((envstr = getenv(env)) == NULL)
  41                 return;
  42         envstr = strdup(envstr);
  43         tok = strtok_r(envstr, token, &lasts);
  44         while (tok) {
  45                 Elist   *lp;
  46                 if ((lp = (Elist *)malloc(sizeof (Elist))) == NULL) {
  47                         (void) printf("build_list: malloc failed\n");
  48                         exit(1);
  49                 }
  50                 lp->l_libname = strdup(tok);
  51                 lp->l_next = *list;
  52                 *list = lp;
  53                 tok = strtok_r(NULL, token, &lasts);
  54         }
  55         free(envstr);
  56 }
  57
  58
  59 Elist *
  60 check_list(Elist *list, const char *str)
  61 {
  62         const char      *basestr;
  63
  64         if (list == NULL)
  65                 return (NULL);
  66
  67         /*
  68          * Is this a basename or a relative path name
  69          */
  70         if ((basestr = strrchr(str, '/')) != NULL)
  71                 basestr++;
  72         else
  73                 basestr = str;
  74
  75
  76         for (; list; list = list->l_next) {
  77                 if (strchr(list->l_libname, '/') == NULL) {
  78                         if (strcmp(basestr, list->l_libname) == 0)
  79                                 return (list);
  80                 } else {
  81                         if (strcmp(str, list->l_libname) == 0)
  82                                 return (list);
  83                 }
  84         }
  85         return (NULL);
  86 }
  87
  88 char *
  89 checkenv(const char *env)
  90 {
  91         char    *envstr;
  92         if ((envstr = getenv(env)) == NULL)
  93                 return (NULL);
  94         while (*envstr == ' ')
  95                 envstr++;
  96         if (*envstr == '\0')
  97                 return (NULL);
  98         return (envstr);
  99 }