From 2e5aeeb9c1988c20bd235103a0134a36e2c73fbe Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Sat, 28 Oct 2023 09:11:02 +0300
Subject: [PATCH] chown test

---
 coreutils/chown.c | 51 ++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 44 insertions(+), 7 deletions(-)

diff --git a/coreutils/chown.c b/coreutils/chown.c
index a317a62..3d64c26 100644
--- a/coreutils/chown.c
+++ b/coreutils/chown.c
@@ -1,5 +1,3 @@
-//TODO
-
 #include <pwd.h>
 #include <grp.h>
 #include <stdio.h>
@@ -9,18 +7,51 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <sys/stat.h>
+unsigned int r_flag;
 
 int (*chown_func)(const char *pathname, uid_t owner, gid_t group);
+int (*stat_func)(const char *restrict pathname, struct stat *restrict statbuf);
 long gid;
 long uid;
 
-int cntree(const char *dst) {
-	if (chown_func(dst, uid, gid) == 0)
-		puts("changed");
+int get_stat(const char *path, struct stat *stat_path) {
+	if (stat_func(path, stat_path)) {
+		fprintf(stderr, "chown: unable to stat %s: %s\n", path, strerror(errno));
+		return 1;
+	}
 
 	return 0;
 }
 
+int change(const char *file) {
+	struct stat old_file;
+	if (get_stat(file, &old_file))
+		return 1;
+
+	if (chown_func(file, uid, gid) == 0) {
+		struct stat new_file;
+		if (get_stat(file, &new_file))
+			return 1;
+
+		if (old_file.st_gid != new_file.st_gid || old_file.st_uid != new_file.st_uid)
+			return 0;
+
+		fprintf(stderr, "chown: %s unchanged\n", file);
+	}
+
+	else
+		fprintf(stderr, "chown: unable to stat %s: %s\n", file, strerror(errno));
+
+	return 1;
+}
+
+int cntree(const char *dst) {
+	change(dst);
+
+	//Recurs
+	return 0;
+}
+
 void get_owner(const char *arg) {
 	char *group = strchr(arg, ':');
 
@@ -58,17 +89,23 @@ void get_owner(const char *arg) {
 
 int main(const int argc, char **argv) {
 	chown_func = lchown;
+	stat_func = stat;
 
 	int i;
 	for (i = 1; i < argc; i++) {
 		if (argv[i][0] != '-')
 			break;
 
-		else if (!strcmp(argv[i], "-H"))
+		else if (!strcmp(argv[i], "-r"))
+			r_flag = 1;
+
+		else if (!strcmp(argv[i], "-H")) {
 			chown_func = chown;
+			stat_func = stat;
+		}
 
 		else if (!strcmp(argv[i], "--help")) {
-			printf("chown [-H (if a command line argument is a symbolic link)] [owner]:[group] [file file2...]\n");
+			printf("chown [-H (if a command line argument is a symbolic link)] [-r (recursive)] [owner]:[group] [file file2...]\n");
 			return 0;
 		}
 	}