*/
#include <common.h>
+#include <bootstage.h>
#include <command.h>
-#include <environment.h>
+#include <env.h>
+#include <env_internal.h>
+#include <log.h>
+#include <sort.h>
#include <linux/stddef.h>
#include <search.h>
#include <errno.h>
#include <malloc.h>
+#include <u-boot/crc.h>
DECLARE_GLOBAL_DATA_PTR;
return ret_val;
}
-void set_default_env(const char *s, int flags)
+void env_set_default(const char *s, int flags)
{
if (sizeof(default_environment) > ENV_SIZE) {
puts("*** Error - default environment is too large\n\n");
debug("Using default environment\n");
}
+ flags |= H_DEFAULT;
if (himport_r(&env_htab, (char *)default_environment,
sizeof(default_environment), '\0', flags, 0,
0, NULL) == 0)
/* [re]set individual variables to their value in the default environment */
-int set_default_vars(int nvars, char * const vars[], int flags)
+int env_set_default_vars(int nvars, char * const vars[], int flags)
{
/*
* Special use-case: import from default environment
* (and use \0 as a separator)
*/
- flags |= H_NOCLEAR;
+ flags |= H_NOCLEAR | H_DEFAULT;
return himport_r(&env_htab, (const char *)default_environment,
sizeof(default_environment), '\0',
flags, 0, nvars, vars);
* Check if CRC is valid and (if yes) import the environment.
* Note that "buf" may or may not be aligned.
*/
-int env_import(const char *buf, int check)
+int env_import(const char *buf, int check, int flags)
{
env_t *ep = (env_t *)buf;
memcpy(&crc, &ep->crc, sizeof(crc));
if (crc32(0, ep->data, ENV_SIZE) != crc) {
- set_default_env("bad CRC", 0);
- return -EIO;
+ env_set_default("bad CRC", 0);
+ return -ENOMSG; /* needed for env_load() */
}
}
- if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', 0, 0,
+ if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', flags, 0,
0, NULL)) {
gd->flags |= GD_FLG_ENV_READY;
return 0;
pr_err("Cannot import environment: errno = %d\n", errno);
- set_default_env("import failed", 0);
+ env_set_default("import failed", 0);
return -EIO;
}
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
static unsigned char env_flags;
-int env_import_redund(const char *buf1, int buf1_read_fail,
- const char *buf2, int buf2_read_fail)
+int env_check_redund(const char *buf1, int buf1_read_fail,
+ const char *buf2, int buf2_read_fail)
{
int crc1_ok, crc2_ok;
- env_t *ep, *tmp_env1, *tmp_env2;
+ env_t *tmp_env1, *tmp_env2;
tmp_env1 = (env_t *)buf1;
tmp_env2 = (env_t *)buf2;
}
if (buf1_read_fail && buf2_read_fail) {
- set_default_env("bad env area", 0);
return -EIO;
} else if (!buf1_read_fail && buf2_read_fail) {
gd->env_valid = ENV_VALID;
- return env_import((char *)tmp_env1, 1);
+ return -EINVAL;
} else if (buf1_read_fail && !buf2_read_fail) {
gd->env_valid = ENV_REDUND;
- return env_import((char *)tmp_env2, 1);
+ return -ENOENT;
}
crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
tmp_env2->crc;
if (!crc1_ok && !crc2_ok) {
- set_default_env("bad CRC", 0);
- return -EIO;
+ return -ENOMSG; /* needed for env_load() */
} else if (crc1_ok && !crc2_ok) {
gd->env_valid = ENV_VALID;
} else if (!crc1_ok && crc2_ok) {
gd->env_valid = ENV_VALID;
}
+ return 0;
+}
+
+int env_import_redund(const char *buf1, int buf1_read_fail,
+ const char *buf2, int buf2_read_fail,
+ int flags)
+{
+ env_t *ep;
+ int ret;
+
+ ret = env_check_redund(buf1, buf1_read_fail, buf2, buf2_read_fail);
+
+ if (ret == -EIO) {
+ env_set_default("bad env area", 0);
+ return -EIO;
+ } else if (ret == -EINVAL) {
+ return env_import((char *)buf1, 1, flags);
+ } else if (ret == -ENOENT) {
+ return env_import((char *)buf2, 1, flags);
+ } else if (ret == -ENOMSG) {
+ env_set_default("bad CRC", 0);
+ return -ENOMSG;
+ }
+
if (gd->env_valid == ENV_VALID)
- ep = tmp_env1;
+ ep = (env_t *)buf1;
else
- ep = tmp_env2;
+ ep = (env_t *)buf2;
env_flags = ep->flags;
- return env_import((char *)ep, 0);
+
+ return env_import((char *)ep, 0, flags);
}
#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */
if (gd->env_valid == ENV_INVALID) {
#if defined(CONFIG_ENV_IS_NOWHERE) || defined(CONFIG_SPL_BUILD)
/* Environment not changable */
- set_default_env(NULL, 0);
+ env_set_default(NULL, 0);
#else
bootstage_error(BOOTSTAGE_ID_NET_CHECKSUM);
- set_default_env("bad CRC", 0);
+ env_set_default("bad CRC", 0);
#endif
} else {
env_load();
}
}
-#if defined(CONFIG_AUTO_COMPLETE) && !defined(CONFIG_SPL_BUILD)
-int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf)
+#ifdef CONFIG_AUTO_COMPLETE
+int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf,
+ bool dollar_comp)
{
- ENTRY *match;
+ struct env_entry *match;
int found, idx;
+ if (dollar_comp) {
+ /*
+ * When doing $ completion, the first character should
+ * obviously be a '$'.
+ */
+ if (var[0] != '$')
+ return 0;
+
+ var++;
+
+ /*
+ * The second one, if present, should be a '{', as some
+ * configuration of the u-boot shell expand ${var} but not
+ * $var.
+ */
+ if (var[0] == '{')
+ var++;
+ else if (var[0] != '\0')
+ return 0;
+ }
+
idx = 0;
found = 0;
cmdv[0] = NULL;
+
while ((idx = hmatch_r(var, idx, &match, &env_htab))) {
int vallen = strlen(match->key) + 1;
- if (found >= maxv - 2 || bufsz < vallen)
+ if (found >= maxv - 2 ||
+ bufsz < vallen + (dollar_comp ? 3 : 0))
break;
cmdv[found++] = buf;
+
+ /* Add the '${' prefix to each var when doing $ completion. */
+ if (dollar_comp) {
+ strcpy(buf, "${");
+ buf += 2;
+ bufsz -= 3;
+ }
+
memcpy(buf, match->key, vallen);
buf += vallen;
bufsz -= vallen;
+
+ if (dollar_comp) {
+ /*
+ * This one is a bit odd: vallen already contains the
+ * '\0' character but we need to add the '}' suffix,
+ * hence the buf - 1 here. strcpy() will add the '\0'
+ * character just after '}'. buf is then incremented
+ * to account for the extra '}' we just added.
+ */
+ strcpy(buf - 1, "}");
+ buf++;
+ }
}
qsort(cmdv, found, sizeof(cmdv[0]), strcmp_compar);
if (idx)
- cmdv[found++] = "...";
+ cmdv[found++] = dollar_comp ? "${...}" : "...";
cmdv[found] = NULL;
return found;