include/environment.h

   1 /*
   2  * (C) Copyright 2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #ifndef _ENVIRONMENT_H_
  25 #define _ENVIRONMENT_H_
  26
  27
  28 #ifdef __U_BOOT__
  29 /**
  30  * Managment of a environment variable
  31  */
  32 struct variable_d {
  33         struct variable_d *next;        /**< List management */
  34         char data[0];                   /**< variable length data */
  35 };
  36
  37 struct env_context {
  38         struct env_context *parent;     /**< FIXME */
  39         struct variable_d *local;       /**< FIXME */
  40         struct variable_d *global;      /**< FIXME */
  41 };
  42
  43 struct env_context *get_current_context(void);
  44 char *var_val(struct variable_d *);
  45 char *var_name(struct variable_d *);
  46
  47 const char *getenv(const char *);
  48 int setenv(const char *, const char *);
  49
  50 int env_pop_context(void);
  51 int env_push_context(void);
  52
  53 int envfs_load(char *filename, char *dirname);
  54 int envfs_save(char *filename, char *dirname);
  55
  56 int export(const char *);
  57
  58 struct stat;
  59 int file_size_action(const char *, struct stat *, void *, int);
  60 int file_save_action(const char *, struct stat *, void *, int);
  61
  62 #endif /* __U_BOOT__ */
  63
  64 /* This part is used for the host and the target */
  65 struct action_data {
  66         int fd;
  67         const char *base;
  68         void *writep;
  69 };
  70 #define PAD4(x) ((x + 3) & ~3)
  71
  72 #endif  /* _ENVIRONMENT_H_ */
  73
  74 /**
  75  * @file
  76  * @brief Environment handling
  77  *
  78  * Important: This file will also be used on the host to create
  79  * the default environment when building the U-Boot binary.
  80  */