Merge pull request #44 from janevers-sys/main

Add find() command

src/userland/cli/find.c

@@ -0,0 +1,93 @@
+#include <stdio.h>
+#include <string.h>
+#include "syscall.h"
+
+int type = 0;           // 0 is nothing, 1 is file, 2 is dir
+char *name = NULL;      
+char *dir = "."; // random char bc it needs to have anything in it
+
+// match exact name
+int match(const char *a, const char *b) {
+    return strcmp(a, b) == 0; 
+}
+
+// check if its a file with fopen
+int isfile(const char *path) {
+    FILE *fp = fopen(path, "r");
+    if (fp) { 
+        fclose(fp); 
+        return 1; }
+    return 0;
+}
+
+// recursive find
+void find(const char *path) {
+    FAT32_FileInfo ents[128];
+    int n = sys_list(path, ents, 128);
+    if (n < 0) return;
+
+    for (int i = 0; i < n; i++) {
+        const char *filename = ents[i].name; 
+        if (match(filename, ".") || match(filename, "..")) {
+            continue;
+        }
+        char full[512];
+        strcpy(full, path);
+        strcat(full, "/");
+        strcat(full, filename); 
+        
+        int f = isfile(full); 
+        if (match(filename, name)) {
+            if (type == 0 || (type == 1 && f) || (type == 2 && !f)) {
+                printf("%s\n", full);
+            }
+        }
+        if (!f) {
+            find(full);
+        }
+    }
+}
+
+int main(int argc, char *argv[]) {
+    // check if user needs help 
+    if (argc > 1 && strcmp(argv[1], "--help") == 0) {
+        printf("Usage: find [DIR] [-name] [pattern] [-type] [d/f]\n");
+        printf("Options:\n");
+        printf("-type d:    only read dir\n");
+        printf("-type f:    only read files\n");
+        return 0;
+    }
+    // check for flags
+    for (int i = 1; i < argc; i++) {
+        if (argv[i][0] == '-') {
+            if (match(argv[i], "-name") && i+1 < argc) {
+                name = argv[++i];
+            }
+            else if (match(argv[i], "-type") && i+1 < argc) {
+                i++;
+                if (match(argv[i], "f")) {
+                    type = 1;
+                }
+                else if (match(argv[i], "d")) {
+                    type = 2;
+                }
+                else {
+                    printf("-only type f or d\n");
+                    return 1;
+                }
+            }
+        }
+        // if dir hasnt been set yet
+        else if (dir[0] == '.') {
+            dir = argv[i];
+        }
+    }
+
+    if (!name) {
+        printf("Wrong usage, --help for more info\n");
+        return 1;
+    }
+
+    find(dir);
+    return 0;
+}