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env: Simplify env_get_default()

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Instead of pretending that we don't have environment to force searching
default environment in env_get_default(), get the data from the
default_environment[] buffer directly.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Marek Behún 2021-11-04 00:23:23 +01:00 committed by Simon Glass
parent e8459c12fd
commit 4e7c8b2a1c
1 changed files with 23 additions and 20 deletions
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43
env/common.c vendored
View file

@ -148,12 +148,10 @@ char *from_env(const char *envvar)
return ret;
}
/*
* Look up variable from environment for restricted C runtime env.
*/
int env_get_f(const char *name, char *buf, unsigned len)
static int env_get_from_linear(const char *env, const char *name, char *buf,
unsigned len)
{
const char *env, *p, *end;
const char *p, *end;
size_t name_len;
if (name == NULL || *name == '\0')
@ -161,11 +159,6 @@ int env_get_f(const char *name, char *buf, unsigned len)
name_len = strlen(name);
if (gd->env_valid == ENV_INVALID)
env = default_environment;
else
env = (const char *)gd->env_addr;
for (p = env; *p != '\0'; p = end + 1) {
const char *value;
unsigned res;
@ -193,6 +186,21 @@ int env_get_f(const char *name, char *buf, unsigned len)
return -1;
}
/*
* Look up variable from environment for restricted C runtime env.
*/
int env_get_f(const char *name, char *buf, unsigned len)
{
const char *env;
if (gd->env_valid == ENV_INVALID)
env = default_environment;
else
env = (const char *)gd->env_addr;
return env_get_from_linear(env, name, buf, len);
}
/**
* Decode the integer value of an environment variable and return it.
*
@ -232,17 +240,12 @@ int env_get_yesno(const char *var)
*/
char *env_get_default(const char *name)
{
char *ret_val;
unsigned long really_valid = gd->env_valid;
unsigned long real_gd_flags = gd->flags;
if (env_get_from_linear(default_environment, name,
(char *)(gd->env_buf),
sizeof(gd->env_buf)) >= 0)
return (char *)(gd->env_buf);
/* Pretend that the image is bad. */
gd->flags &= ~GD_FLG_ENV_READY;
gd->env_valid = ENV_INVALID;
ret_val = env_get(name);
gd->env_valid = really_valid;
gd->flags = real_gd_flags;
return ret_val;
return NULL;
}
void env_set_default(const char *s, int flags)