#include "global.h"
#include "ub_env.h"
env_t *env;
static int
ub_flash_io(const char *csSec, int mode)
{
int f, l, rlen;
const char *str;
size_t siz;
ait_val_t v;
FTRACE(4);
str = cfg_getAttribute(&cfg, csSec, "size");
siz = strtol(str, NULL, 0);
if (!siz)
return -1;
str = cfg_getAttribute(&cfg, csSec, "drive");
if (!str) {
printf("Error:: drive not found!\n");
return -1;
}
cfg_loadAttribute(&cfg, "ube", "lock", &v, UBE_LOCK);
l = open(AIT_GET_STR(&v), O_CREAT | O_EXCL | O_WRONLY, 0644);
if (l == -1) {
printf("Error:: Locked u-boot-env map %s\n", AIT_GET_STR(&v));
AIT_FREE_VAL(&v);
return -1;
}
f = open(str, mode);
if (f == -1) {
printf("Error:: Can't access u-boot-env device %s\n", str);
close(l);
unlink(AIT_GET_STR(&v));
AIT_FREE_VAL(&v);
return -1;
}
if (mode & O_RDWR) {
rlen = write(f, env, siz);
if (rlen != siz)
printf("Error:: written %d bytes != %d\n", rlen, siz);
else
VERB(3) printf("Written %d bytes\n", rlen);
lseek(f, 0, SEEK_SET);
}
rlen = read(f, env, siz);
if (rlen != siz)
printf("Error:: readed %d bytes != %d\n", rlen, siz);
else
VERB(3) printf("Readed %d bytes\n", rlen);
close(f);
close(l);
unlink(AIT_GET_STR(&v));
AIT_FREE_VAL(&v);
return 0;
}
static inline const char *
ub_envmatch(const char *csName, const char *e)
{
const char *str = NULL;
while (*csName == *e++)
if (*csName++ == '=')
return e;
if (!*csName && *(e - 1) == '=')
return e;
return NULL;
}
int
ub_load(const char *csSec)
{
const char *str;
size_t siz;
FTRACE(4);
str = cfg_getAttribute(&cfg, csSec, "size");
siz = strtol(str, NULL, 0);
if (!siz)
return -1;
env = e_malloc(siz);
if (!env) {
ELIBERR(elwix);
return -1;
}
return ub_flash_io(csSec, O_RDONLY);
}
void
ub_unload()
{
FTRACE(4);
if (env)
e_free(env);
}
const char*
ub_getenv(const char *csSec, const char *csName)
{
char *e, *nxt;
size_t dlen;
const char *str = NULL;
FTRACE(3);
str = cfg_getAttribute(&cfg, csSec, "size");
dlen = strtol(str, NULL, 0);
if (!dlen)
return NULL;
else
dlen--;
for (e = env->env_data; *e; e = nxt + 1) {
for (nxt = e; *nxt; nxt++)
if (nxt >= env->env_data + dlen) {
printf("Error:: environment not terminated\n");
return NULL;
}
str = ub_envmatch(csName, e);
if (str)
break;
}
return str;
}
int
ub_setenv(const char *csSec, const char *csName, const char *csValue)
{
FTRACE(3);
return 0;
}
int
ub_env(const char *csSec)
{
char *e, *nxt;
size_t dlen;
const char *str;
FTRACE(3);
str = cfg_getAttribute(&cfg, csSec, "size");
dlen = strtol(str, NULL, 0);
if (!dlen)
return -1;
else
dlen--;
for (e = env->env_data; *e; e = nxt + 1) {
for (nxt = e; *nxt; nxt++)
if (nxt >= env->env_data + dlen) {
printf("Error:: environment not terminated\n");
return -1;
}
printf("%s\n", e);
}
return 0;
}
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