env: Distinguish finer between source of env change

We already could tell the difference in the callback between an import
and "other" which we called interactive. Now add further distinction
between interactive (i.e. running env set / env edit / env ask / etc.
from the U-Boot command line) and programmatic (i.e. when u-boot source
calls any variant of setenv() ).

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

common/cmd_nvedit.c

@@ -208,12 +208,11 @@ DONE:
  * Set a new environment variable,
  * or replace or delete an existing one.
  */
-static int _do_env_set(int flag, int argc, char * const argv[])
+static int _do_env_set(int flag, int argc, char * const argv[], int env_flag)
 {
 	int   i, len;
 	char  *name, *value, *s;
 	ENTRY e, *ep;
-	int env_flag = H_INTERACTIVE;
 
 	debug("Initial value for argc=%d\n", argc);
 	while (argc > 1 && **(argv + 1) == '-') {
@@ -291,9 +290,9 @@ int setenv(const char *varname, const char *varvalue)
 		return 1;
 
 	if (varvalue == NULL || varvalue[0] == '\0')
-		return _do_env_set(0, 2, (char * const *)argv);
+		return _do_env_set(0, 2, (char * const *)argv, H_PROGRAMMATIC);
 	else
-		return _do_env_set(0, 3, (char * const *)argv);
+		return _do_env_set(0, 3, (char * const *)argv, H_PROGRAMMATIC);
 }
 
 /**
@@ -347,7 +346,7 @@ static int do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	if (argc < 2)
 		return CMD_RET_USAGE;
 
-	return _do_env_set(flag, argc, argv);
+	return _do_env_set(flag, argc, argv, H_INTERACTIVE);
 }
 
 /*
@@ -422,7 +421,7 @@ int do_env_ask(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	}
 
 	/* Continue calling setenv code */
-	return _do_env_set(flag, len, local_args);
+	return _do_env_set(flag, len, local_args, H_INTERACTIVE);
 }
 #endif
 
@@ -588,6 +587,10 @@ static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (argc < 2)
 		return CMD_RET_USAGE;
 
+	/* before import into hashtable */
+	if (!(gd->flags & GD_FLG_ENV_READY))
+		return 1;
+
 	/* Set read buffer to initial value or empty sting */
 	init_val = getenv(argv[1]);
 	if (init_val)
@@ -598,7 +601,16 @@ static int do_env_edit(cmd_tbl_t *cmdtp, int flag, int argc,
 	if (cli_readline_into_buffer("edit: ", buffer, 0) < 0)
 		return 1;
 
-	return setenv(argv[1], buffer);
+	if (buffer[0] == '\0') {
+		const char * const _argv[3] = { "setenv", argv[1], NULL };
+
+		return _do_env_set(0, 2, (char * const *)_argv, H_INTERACTIVE);
+	} else {
+		const char * const _argv[4] = { "setenv", argv[1], buffer,
+			NULL };
+
+		return _do_env_set(0, 3, (char * const *)_argv, H_INTERACTIVE);
+	}
 }
 #endif /* CONFIG_CMD_EDITENV */
 #endif /* CONFIG_SPL_BUILD */

include/search.h

@@ -120,5 +120,7 @@ extern int hwalk_r(struct hsearch_data *__htab, int (*callback)(ENTRY *));
 #define H_MATCH_SUBSTR	(1 << 7) /* search for substring matches	     */
 #define H_MATCH_REGEX	(1 << 8) /* search for regular expression matches    */
 #define H_MATCH_METHOD	(H_MATCH_IDENT | H_MATCH_SUBSTR | H_MATCH_REGEX)
+#define H_PROGRAMMATIC	(1 << 9) /* indicate that an import is from setenv() */
+#define H_ORIGIN_FLAGS	(H_INTERACTIVE | H_PROGRAMMATIC)
 
 #endif /* search.h */