text: #define _POSIX_C_SOURCE 200809L
  #include <string.h>
  #include <strings.h>
  #include "sway/commands.h"
  #include "log.h"
  
  struct cmd_results *bar_cmd_position(int argc, char **argv) {
  	struct cmd_results *error = NULL;
  	if ((error = checkarg(argc, "position", EXPECTED_EQUAL_TO, 1))) {
  		return error;
  	}
  	if (!config->current_bar) {
  		return cmd_results_new(CMD_FAILURE, "position", "No bar defined.");
  	}
  	char *valid[] = { "top", "bottom", "left", "right" };
  	for (size_t i = 0; i < sizeof(valid) / sizeof(valid[0]); ++i) {
  		if (strcasecmp(valid[i], argv[0]) == 0) {
  			wlr_log(WLR_DEBUG, "Setting bar position '%s' for bar: %s",
  					argv[0], config->current_bar->id);
  			free(config->current_bar->position);
  			config->current_bar->position = strdup(argv[0]);
  			return cmd_results_new(CMD_SUCCESS, NULL, NULL);
  		}
  	}
  	return cmd_results_new(CMD_INVALID,
  			"position", "Invalid value %s", argv[0]);
  }
  