globalvar: add support to set a value to of all globalvars beginning with 'match'

via c global_set_match and global -r

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

commands/global.c

@@ -24,39 +24,68 @@
 #include <command.h>
 #include <globalvar.h>
 #include <environment.h>
+#include <getopt.h>
 
-static int do_global(int argc, char *argv[])
+static int globalvar_set(char* name, char* value)
 {
 	int ret;
-	char *value;
 
-	if (argc != 2)
-		return COMMAND_ERROR_USAGE;
-
-	value = strchr(argv[1], '=');
-	if (value) {
-		*value = 0;
-		value++;
-	}
-
-	ret = globalvar_add_simple(argv[1]);
+	ret = globalvar_add_simple(name);
 
 	if (value) {
-		char *name = asprintf("global.%s", argv[1]);
-		ret = setenv(name, value);
-		free(name);
+		char *tmp = asprintf("global.%s", name);
+		ret = setenv(tmp, value);
+		free(tmp);
 	}
 
 	return ret ? 1 : 0;
 }
 
+static int do_global(int argc, char *argv[])
+{
+	int opt;
+	int do_set_match = 0;
+	char *value;
+
+	while ((opt = getopt(argc, argv, "r")) > 0) {
+		switch (opt) {
+		case 'r':
+			do_set_match = 1;
+			break;
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 1)
+		return COMMAND_ERROR_USAGE;
+
+	value = strchr(argv[0], '=');
+	if (value) {
+		*value = 0;
+		value++;
+	}
+
+	if (do_set_match) {
+		if (!value)
+			value = "";
+
+		globalvar_set_match(argv[0], value);
+		return 0;
+	}
+
+	return globalvar_set(argv[0], value);
+}
+
 BAREBOX_CMD_HELP_START(global)
-BAREBOX_CMD_HELP_USAGE("global <var>[=<value]\n")
+BAREBOX_CMD_HELP_USAGE("global [-r] <var>[=<value]\n")
 BAREBOX_CMD_HELP_SHORT("add a new global variable named <var>, optionally set to <value>\n")
+BAREBOX_CMD_HELP_SHORT("-r to set a value to of all globalvars beginning with 'match'")
 BAREBOX_CMD_HELP_END
 
 BAREBOX_CMD_START(global)
 	.cmd		= do_global,
-	.usage		= "create global variables",
+	.usage		= "create or set global variables",
 	BAREBOX_CMD_HELP(cmd_global_help)
 BAREBOX_CMD_END

common/globalvar.c

@@ -46,6 +46,16 @@ char *globalvar_get_match(const char *match, const char *seperator)
 	return val;
 }
 
+void globalvar_set_match(const char *match, const char *val)
+{
+	struct param_d *param;
+
+	list_for_each_entry(param, &global_device.parameters, list) {
+		if (!strncmp(match, param->name, strlen(match)))
+			dev_set_param(&global_device, param->name, val);
+	}
+}
+
 /*
  * globalvar_add_simple
  *

include/globalvar.h

@@ -9,6 +9,7 @@ int globalvar_add(const char *name,
 		const char *(*get)(struct device_d *, struct param_d *p),
 		unsigned long flags);
 char *globalvar_get_match(const char *match, const char *seperator);
+void globalvar_set_match(const char *match, const char *val);
 #else
 static inline int globalvar_add_simple(const char *name)
 {
@@ -27,6 +28,8 @@ static inline char *globalvar_get_match(const char *match, const char *seperator
 {
 	return NULL;
 }
+
+static inline void globalvar_set_match(const char *match, const char *val) {}
 #endif
 
 #endif /* __GLOBALVAR_H */