Config iteration

config_ini/conf.c

@@ -57,6 +57,13 @@ Config *config_load(const char *filename) {
     return cfg;
 }
 
+ConfigEntry *config_get_next(ConfigEntry *entry, int *index) {
+    if (!entry)
+        return NULL;
+
+    return (0 == (*index)++) ? entry : entry->next;
+}
+
 /* Get value for a key */
 const char *config_get(Config *cfg, const char *key) {
     for (ConfigEntry *e = cfg->head; e; e = e->next) {

config_ini/conf.h

@@ -11,8 +11,9 @@ typedef struct {
     ConfigEntry *head;
 } Config;
 
-Config     *config_load(const char *filename);
-const char *config_get(Config *cfg, const char *key);
-void        config_free(Config *cfg);
+Config      *config_load(const char *filename);
+const char  *config_get(Config *cfg, const char *key);
+ConfigEntry *config_get_next(ConfigEntry *entry, int *index);
+void         config_free(Config *cfg);
 
 #endif // CONF_H

config_ini/main.c

@@ -1,8 +1,53 @@
 #include "conf.h"
+#include <fcntl.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
-// Example usage
 int main(void) {
+    const char *home = getenv("HOME");
+    if (!home) {
+        perror("home");
+        exit(EXIT_FAILURE);
+    }
+
+    /* Potentially scope this to preserve stack if thats an issue */
+    char config_dir[256];
+    char config_file[512];
+
+    {
+        snprintf(config_dir, sizeof(config_dir), "%s/.config", home);
+        snprintf(config_file, sizeof(config_file), "%s/mytool.ini", config_dir);
+
+        /* Ensure ~/.config exists */
+        struct stat st;
+        if (stat(config_dir, &st) == 0) {
+            if (!S_ISDIR(st.st_mode)) {
+                printf("Creating config directory\n");
+                mkdir(config_dir, 0700);
+                perror("mkdir ~/.config");
+            }
+        }
+
+        /* Create config file */
+        int fd = open(config_file, O_RDWR | O_CREAT, 0600);
+        if (fd < 0) {
+            perror("open mytool.ini");
+            return 1;
+        }
+        close(fd);
+    }
+
+    FILE *f = fopen(config_file, "r");
+    if (!f) {
+        perror("fopen");
+        return 1;
+    }
+    /* Parsing here ... */
+    fclose(f);
+    unlink(config_file);
+
     Config *cfg = config_load("config.ini");
     if (!cfg) {
         fprintf(stderr, "Failed to load config.ini\n");
@@ -15,6 +60,15 @@ int main(void) {
     printf("Username: %s\n", user ? user : "(not set)");
     printf("Password: %s\n", pass ? pass : "(not set)");
 
+    printf("-----\n");
+
+    /* Iterate over config values */
+    ConfigEntry *c = cfg->head;
+    int          idx = 0;
+    while ((c = config_get_next(c, &idx)) != NULL) {
+        printf("%s = %s\n", c->key, c->value);
+    }
+
     config_free(cfg);
     return 0;
 }