diff --git a/include/libmu/human.h b/include/libmu/human.h
index 00bd0ab..1248b42 100644
--- a/include/libmu/human.h
+++ b/include/libmu/human.h
@@ -1,12 +1,15 @@
 #ifndef _HUMAN_H
 #define _HUMAN_H
 
+#include <stdlib.h>
 #include <stdint.h>
 
 #define MU_HUMAN_BUF_SIZE 16
 
 char *mu_humansize(off_t n, off_t block) {
 	static char buf[MU_HUMAN_BUF_SIZE + 1];
+	memset(buf, '\0', sizeof(buf));
+
 	char *postfixes = "BKMGTPE";
 
 	double size = n;
diff --git a/include/libmu/parse_mode.h b/include/libmu/parse_mode.h
index 1c1133e..66877c8 100644
--- a/include/libmu/parse_mode.h
+++ b/include/libmu/parse_mode.h
@@ -12,7 +12,6 @@
 #define WR_PERM (S_IWUSR | S_IWGRP | S_IWOTH)
 #define EX_PERM (S_IXUSR | S_IXGRP | S_IXOTH)
 #define RD_PERM (S_IRUSR | S_IRGRP | S_IROTH)
-#define S_PERM  (S_ISUID | S_ISGID | S_ISVTX)
 #define FULL_PERM (WR_PERM | EX_PERM | RD_PERM)
 
 mode_t mu_parse_mode(const char *s, mode_t cur_mode) {
@@ -33,10 +32,6 @@ mode_t mu_parse_mode(const char *s, mode_t cur_mode) {
 
 	for (size_t i = 0; i < strlen(s); i++) {
 		switch (s[i]) {
-			case 's':
-				mode |= S_PERM;
-				break;
-
 			case 'r':
 				mode |= RD_PERM;
 				break;
diff --git a/src/coreutils/cp/cp.c b/src/coreutils/cp/cp.c
index e41db0a..7e32794 100644
--- a/src/coreutils/cp/cp.c
+++ b/src/coreutils/cp/cp.c
@@ -187,11 +187,17 @@ int main(int argc, char **argv) {
 	}
 
 	int ret = 0;
+	if (!access(argv[argc - 1], F_OK))
+		goto IF_EXSIST;
+
 	if (argc == 2)
 		ret = cptree(argv[0], argv[argc - 1]);
 
+
 	else {
-		for (int i = 1; i < argc - 1; i++) {
+
+IF_EXSIST:
+		for (int i = 0; i < argc - 1; i++) {
 			char *new_path = mu_make_path(f_flag, argv[argc - 1], basename(argv[i]));
 			if (new_path == NULL)
 				return 1;
diff --git a/src/coreutils/df/df.c b/src/coreutils/df/df.c
index e9e7c4c..ea7f61b 100644
--- a/src/coreutils/df/df.c
+++ b/src/coreutils/df/df.c
@@ -13,18 +13,6 @@ char a_flag;
 char h_flag;
 off_t block = 1024;
 
-void print_human(const char *src, const off_t total, const off_t used, const off_t avail, const off_t capacity, const char *dst) {
-	char total_s[MU_HUMAN_BUF_SIZE + 1];
-	char used_s[MU_HUMAN_BUF_SIZE + 1];
-	char avail_s[MU_HUMAN_BUF_SIZE + 1];
-
-	snprintf(total_s, sizeof(total_s), "%s", mu_humansize(total * block, block));
-	snprintf(used_s, sizeof(used_s), "%s", mu_humansize(used * block, block));
-	snprintf(avail_s, sizeof(avail_s), "%s", mu_humansize(avail * block, block));
-
-	printf("%-20s %5s %5s %5s %7ju%% %s\n", src, total_s, used_s, avail_s, capacity, dst);
-}
-
 int main(int argc, char **argv) {
 
 	int opt;
@@ -55,35 +43,45 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
-	printf("[Filesystem]           [Size]  [Used]  [Avail]  [Capacity]  [Mounted on]\n");
+	puts("Filesystem                 Size      Used Available Use% Mounted on");
 
 	int ret = 0;
 	struct mntent *me;
 	struct statvfs disk;
+
 	while ((me = getmntent(fp)) != NULL) {
 		if (!strcmp(me->mnt_fsname, "none"))
 			continue;
 
-		if (!a_flag)
-			if (!strncmp(me->mnt_fsname, "fs", 2))
-				continue;
-
 		if (statvfs(me->mnt_dir, &disk) < 0) {
 			ret = 1;
 			continue;
 		}
 
+		if (!a_flag)
+			if (!strcmp(me->mnt_fsname, "/dev/root") || disk.f_blocks == 0)
+				continue;
+
 		off_t bs = disk.f_frsize / block;
 		off_t total = disk.f_blocks * bs;
 		off_t avail = disk.f_bfree * bs;
 		off_t used = total - avail;
-		off_t capacity = (used * 100) / (avail + used) + 1;
+		off_t capacity = (used * 100 + 1) / (avail + used + 1);
 
-		if (h_flag)
-			print_human(me->mnt_fsname, total, used, avail, capacity, me->mnt_dir);
+		if (!h_flag)
+			printf("%-20s %12ju %12ju %12ju %12ju%% %s\n", me->mnt_fsname, total, used, avail, capacity, me->mnt_dir);
 
-		else
-			printf("%-20s %7ju %7ju %7ju %7ju%% %s\n", me->mnt_fsname, total, used, avail, capacity, me->mnt_dir);
+		else {
+			char total_s[MU_HUMAN_BUF_SIZE + 1];
+			char used_s[MU_HUMAN_BUF_SIZE + 1];
+			char avail_s[MU_HUMAN_BUF_SIZE + 1];
+
+			snprintf(total_s, sizeof(total_s), "%s", mu_humansize(total * block, block));
+			snprintf(used_s, sizeof(used_s), "%s", mu_humansize(used * block, block));
+			snprintf(avail_s, sizeof(avail_s), "%s", mu_humansize(avail * block, block));
+
+			printf("%-20s %10s %9s %9s %3ju%% %s\n", me->mnt_fsname, total_s, used_s, avail_s, capacity, me->mnt_dir);
+		}
 	}
 
 	endmntent(fp);