Walk

walk.c

@@ -0,0 +1,70 @@
+#include <dirent.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+void walk_dir(const char *path, int follow_symlinks, int ignore_hidden) {
+    DIR *dir = opendir(path);
+    if (!dir) {
+        perror(path);
+        return;
+    }
+
+    struct dirent *entry;
+    while ((entry = readdir(dir)) != NULL) {
+        if (strncmp(entry->d_name, ".", 1) == 0)
+            continue;
+
+        if (strncmp(entry->d_name, "..", 2) == 0)
+            continue;
+
+        // Skip hidden files if requested
+        if (ignore_hidden && entry->d_name[0] == '.')
+            continue;
+
+        char fullpath[4096];
+        snprintf(fullpath, sizeof(fullpath), "%s/%s", path, entry->d_name);
+
+        struct stat st;
+        int         ret;
+        if (follow_symlinks)
+            ret = stat(fullpath, &st);
+        else
+            ret = lstat(fullpath, &st);
+
+        if (ret != 0) {
+            /* Permission denied ends up here */
+            perror(fullpath);
+            continue;
+        }
+
+        /* There are a bunch of macros in <sys/stat.h> like S_ISDIR for checking */
+        printf("FILE: %s\n", fullpath);
+        if (S_ISDIR(st.st_mode)) {
+            walk_dir(fullpath, follow_symlinks, ignore_hidden);
+        } 
+    }
+
+    closedir(dir);
+}
+
+int main(int argc, char *argv[]) {
+    if (argc < 2) {
+        fprintf(stderr, "Usage: %s <dir> [--follow-symlinks] [--ignore-hidden]\n", argv[0]);
+        return 1;
+    }
+
+    int follow_symlinks = 0;
+    int ignore_hidden = 0;
+
+    for (int i = 2; i < argc; i++) {
+        if (strcmp(argv[i], "--follow-symlinks") == 0)
+            follow_symlinks = 1;
+        if (strcmp(argv[i], "--ignore-hidden") == 0)
+            ignore_hidden = 1;
+    }
+
+    walk_dir(argv[1], follow_symlinks, ignore_hidden);
+    return 0;
+}