Use g_get_user_config_dir

Instead of opencoding rely on glib which handles XDG_CONFIG_HOME and
such. This also prevents xdg_config from leaking.

src/camera_config.c

@@ -3,7 +3,6 @@
 #include "ini.h"
 #include "config.h"
 #include "matrix.h"
-#include <wordexp.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -21,18 +20,8 @@ static bool
 find_config(char *conffile)
 {
 	char buf[512];
-	char *xdg_config_home;
-	wordexp_t exp_result;
 	FILE *fp;
 
-	// Resolve XDG stuff
-	if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL) {
-		xdg_config_home = "~/.config";
-	}
-	wordexp(xdg_config_home, &exp_result, 0);
-	xdg_config_home = strdup(exp_result.we_wordv[0]);
-	wordfree(&exp_result);
-
 	if (access("/proc/device-tree/compatible", F_OK) != -1) {
 		// Reads to compatible string of the current device tree, looks like:
 		// pine64,pinephone-1.2\0allwinner,sun50i-a64\0
@@ -48,7 +37,7 @@ find_config(char *conffile)
 		}
 
 		// Check for a config file in XDG_CONFIG_HOME
-		sprintf(conffile, "%s/megapixels/config/%s.ini", xdg_config_home,
+		sprintf(conffile, "%s/megapixels/config/%s.ini", g_get_user_config_dir (),
 			buf);
 		if (access(conffile, F_OK) != -1) {
 			printf("Found config file at %s\n", conffile);

src/process_pipeline.c

@@ -9,7 +9,6 @@
 #include <tiffio.h>
 #include <assert.h>
 #include <math.h>
-#include <wordexp.h>
 #include <gtk/gtk.h>
 
 #include "gl_util.h"
@@ -70,20 +69,10 @@ register_custom_tiff_tags(TIFF *tif)
 static bool
 find_processor(char *script)
 {
-	char *xdg_config_home;
 	char filename[] = "postprocess.sh";
-	wordexp_t exp_result;
 
-	// Resolve XDG stuff
-	if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL) {
-		xdg_config_home = "~/.config";
-	}
-	wordexp(xdg_config_home, &exp_result, 0);
-	xdg_config_home = strdup(exp_result.we_wordv[0]);
-	wordfree(&exp_result);
-
-	// Check postprocess.h in the current working directory
-	sprintf(script, "data/%s", filename);
+	// Check postprocess.sh in the current working directory
+	sprintf(script, "./data/%s", filename);
 	if (access(script, F_OK) != -1) {
 		sprintf(script, "./data/%s", filename);
 		printf("Found postprocessor script at %s\n", script);
@@ -91,7 +80,7 @@ find_processor(char *script)
 	}
 
 	// Check for a script in XDG_CONFIG_HOME
-	sprintf(script, "%s/megapixels/%s", xdg_config_home, filename);
+	sprintf(script, "%s/megapixels/%s", g_get_user_config_dir(), filename);
 	if (access(script, F_OK) != -1) {
 		printf("Found postprocessor script at %s\n", script);
 		return true;