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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Environment variable subroutines File: env_subr.c
*
* This module contains routines to muck with environment variables
* (manage the list, read/write to nvram, etc.)
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
#include "lib_types.h"
#include "lib_string.h"
#include "lib_queue.h"
#include "lib_malloc.h"
#include "lib_printf.h"
#include "env_subr.h"
///#include "nvram_subr.h"
#include "cfe_error.h"
#include "cfe.h"
/* *********************************************************************
* Types
********************************************************************* */
typedef struct cfe_envvar_s {
queue_t qb;
int flags;
char *name;
char *value;
/* name and value go here */
} cfe_envvar_t;
/* *********************************************************************
* Globals
********************************************************************* */
queue_t env_envvars = {&env_envvars,&env_envvars};
extern unsigned int cfe_startflags;
/* *********************************************************************
* env_findenv(name)
*
* Locate an environment variable in the in-memory list
*
* Input parameters:
* name - name of env var to find
*
* Return value:
* cfe_envvar_t pointer, or NULL if not found
********************************************************************* */
static cfe_envvar_t *env_findenv(const char *name)
{
queue_t *qb;
cfe_envvar_t *env;
for (qb = env_envvars.q_next; qb != &env_envvars; qb = qb->q_next) {
env = (cfe_envvar_t *) qb;
if (strcmp(env->name,name) == 0) break;
}
if (qb == &env_envvars) return NULL;
return (cfe_envvar_t *) qb;
}
/* *********************************************************************
* env_enum(idx,name,namelen,val,vallen)
*
* Enumerate environment variables. This routine locates
* the nth environment variable and copies its name and value
* to user buffers.
*
* The namelen and vallen variables must be preinitialized to
* the maximum size of the output buffer.
*
* Input parameters:
* idx - variable index to find (starting with zero)
* name,namelen - name buffer and length
* val,vallen - value buffer and length
*
* Return value:
* 0 if ok
* else error code
********************************************************************* */
int env_enum(int idx,char *name,int *namelen,char *val,int *vallen)
{
queue_t *qb;
cfe_envvar_t *env;
for (qb = env_envvars.q_next; qb != &env_envvars; qb = qb->q_next) {
if (idx == 0) break;
idx--;
}
if (qb == &env_envvars) return CFE_ERR_ENVNOTFOUND;
env = (cfe_envvar_t *) qb;
*namelen = xstrncpy(name,env->name,*namelen);
*vallen = xstrncpy(val,env->value,*vallen);
return 0;
}
/* *********************************************************************
* env_envtype(name)
*
* Return the type of the environment variable
*
* Input parameters:
* name - name of environment variable
*
* Return value:
* flags, or <0 if error occured
********************************************************************* */
int env_envtype(const char *name)
{
cfe_envvar_t *env;
env = env_findenv(name);
if (env) {
return env->flags;
}
return CFE_ERR_ENVNOTFOUND;
}
/* *********************************************************************
* env_delenv(name)
*
* Delete an environment variable
*
* Input parameters:
* name - environment variable to delete
*
* Return value:
* 0 if ok
* else error code
********************************************************************* */
int env_delenv(const char *name)
{
cfe_envvar_t *env;
env = env_findenv(name);
if (!env) return 0;
if (!(env->flags & ENV_FLG_READONLY)) {
q_dequeue((queue_t *) env);
KFREE(env);
return 0;
}
return CFE_ERR_ENVNOTFOUND;
}
/* *********************************************************************
* env_getenv(name)
*
* Retrieve the value of an environment variable
*
* Input parameters:
* name - name of environment variable to find
*
* Return value:
* value, or NULL if variable is not found
********************************************************************* */
char *env_getenv(const char *name)
{
cfe_envvar_t *env;
env = env_findenv(name);
if (env) {
return env->value;
}
return NULL;
}
/* *********************************************************************
* env_setenv(name,value,flags)
*
* Set the value of an environment variable
*
* Input parameters:
* name - name of variable
* value - value of variable
* flags - flags for variable (ENV_FLG_xxx)
*
* Return value:
* 0 if ok
* else error code
********************************************************************* */
int env_setenv(const char *name,char *value,int flags)
{
cfe_envvar_t *env;
int namelen;
env = env_findenv(name);
if (env) {
if (!(flags & ENV_FLG_ADMIN)) {
if (env->flags & ENV_FLG_READONLY) return CFE_ERR_ENVREADONLY;
}
q_dequeue((queue_t *) env);
KFREE(env);
}
namelen = strlen(name);
env = KMALLOC(sizeof(cfe_envvar_t) + namelen + 1 + strlen(value) + 1,0);
if (!env) return CFE_ERR_NOMEM;
env->name = (char *) (env+1);
env->value = env->name + namelen + 1;
env->flags = (flags & ENV_FLG_MASK);
strcpy(env->name,name);
strcpy(env->value,value);
q_enqueue(&env_envvars,(queue_t *) env);
return 0;
}
int env_save(void)
{
return 0;
}
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