1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Common environment functions
*
* (C) Copyright 2000-2009
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#ifndef __ENV_H
#define __ENV_H
#include <stdbool.h>
#include <linux/types.h>
/**
* env_get_id() - Gets a sequence number for the environment
*
* This value increments every time the environment changes, so can be used an
* an indication of this
*
* @return environment ID
*/
int env_get_id(void);
/**
* env_init() - Set up the pre-relocation environment
*
* This locates the environment or uses the default if nothing is available.
* This must be called before env_get() will work.
*
* @return 0 if OK, -ENODEV if no environment drivers are enabled
*/
int env_init(void);
/**
* env_relocate() - Set up the post-relocation environment
*
* This loads the environment into RAM so that it can be modified. This is
* called after relocation, before the environment is used
*/
void env_relocate(void);
/**
* env_match() - Match a name / name=value pair
*
* This is used prior to relocation for finding envrionment variables
*
* @name: A simple 'name', or a 'name=value' pair.
* @index: The environment index for a 'name2=value2' pair.
* @return index for the value if the names match, else -1.
*/
int env_match(unsigned char *name, int index);
/**
* env_get_f() - Look up the value of an environment variable (early)
*
* This function is called from env_get() if the environment has not been
* loaded yet (GD_FLG_ENV_READY flag is 0). Some environment locations will
* support reading the value (slowly) and some will not.
*
* @varname: Variable to look up
* @return value of variable, or NULL if not found
*/
int env_get_f(const char *name, char *buf, unsigned int len);
/**
* env_set_hex() - set an environment variable to a hex value
*
* @varname: Variable to adjust
* @value: Value to set for the variable (will be converted to a hex string)
* @return 0 if OK, 1 on error
*/
int env_set_hex(const char *varname, ulong value);
/**
* env_set_addr - Set an environment variable to an address in hex
*
* @varname: Environment variable to set
* @addr: Value to set it to
* @return 0 if ok, 1 on error
*/
static inline int env_set_addr(const char *varname, const void *addr)
{
return env_set_hex(varname, (ulong)addr);
}
/**
* env_complete() - return an auto-complete for environment variables
*
* @var: partial name to auto-complete
* @maxv: Maximum number of matches to return
* @cmdv: Returns a list of possible matches
* @maxsz: Size of buffer to use for matches
* @buf: Buffer to use for matches
* @dollar_comp: non-zero to wrap each match in ${...}
* @return number of matches found (in @cmdv)
*/
int env_complete(char *var, int maxv, char *cmdv[], int maxsz, char *buf,
bool dollar_comp);
#endif
|
