diff --git a/include/libmu/get_string.h b/include/libmu/get_string.h
deleted file mode 100644
index 2568ef2..0000000
--- a/include/libmu/get_string.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#ifndef _GET_STRING_H
-#define _GET_STRING_H
-
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-
-int mu_get_string(const char *prog_name, char *buf, const size_t len) {
-	off_t rbytes = read(STDIN_FILENO, buf, len);
-
-	if (rbytes <= 0) {
-		if (prog_name != NULL)
-			fprintf(stderr, "%s: %s\n", prog_name, strerror(errno));
-
-		return 0;
-	}
-
-	if (rbytes > 0)
-		buf[rbytes - 1] = '\0';
-
-	buf[rbytes] = '\0';
-	return rbytes;
-}
-
-#endif
diff --git a/include/libmu/human.h b/include/libmu/human.h
index c74f5b9..7b4192e 100644
--- a/include/libmu/human.h
+++ b/include/libmu/human.h
@@ -22,7 +22,7 @@ char *mu_humansize(off_t n, off_t block) {
 		snprintf(buf, sizeof(buf), "%.1f%c", size, postfixes[i]);
 
 	else
-		snprintf(buf, sizeof(buf), "%ju", (uintmax_t)n);
+		snprintf(buf, sizeof(buf), "%ju", n);
 
 	return buf;
 }
diff --git a/src/coreutils/cp/cp.c b/src/coreutils/cp/cp.c
index 2f7c3c9..bcb9a61 100644
--- a/src/coreutils/cp/cp.c
+++ b/src/coreutils/cp/cp.c
@@ -53,7 +53,7 @@ int copy(int mode, const char *src, const char *dst) {
 		return 1;
 
 	/* test ./testdir/ -> test ./testdir/test */
-	char *dup = NULL;
+	char *str_dup = NULL;
 	char *new_path = (char *)dst;
 	int flag = 0;
 	int ret = 0;
@@ -62,14 +62,14 @@ int copy(int mode, const char *src, const char *dst) {
 	if (ofd < 0) {
 		ret = 1;
 
-		dup = strdup(src);
-		if (dup == NULL)
+		str_dup = strdup(src);
+		if (str_dup == NULL)
 			goto CLOSE;
 
 		flag = 1;
 		new_path = NULL;
 
-		new_path = mu_make_path(f_flag, dst, basename(dup));
+		new_path = mu_make_path(f_flag, dst, basename(str_dup));
 		if (new_path == NULL)
 			goto CLOSE;
 
@@ -93,8 +93,8 @@ int copy(int mode, const char *src, const char *dst) {
 CLOSE:
 	close(ifd);
 	if (flag) {
-		if (dup != NULL)
-			free(dup);
+		if (str_dup != NULL)
+			free(str_dup);
 
 		if (new_path != NULL)
 			free(new_path);
diff --git a/src/coreutils/dd/dd.c b/src/coreutils/dd/dd.c
index a0dcf23..ac99d85 100644
--- a/src/coreutils/dd/dd.c
+++ b/src/coreutils/dd/dd.c
@@ -12,8 +12,8 @@ off_t outfull, outpart;
 off_t tbytes;
 
 void summary(void) {
-	fprintf(stderr, "%zu+%zu records in\n", infull, inpart);
-	fprintf(stderr, "%zu+%zu records out\n", outfull, outpart);
+	fprintf(stderr, "%jd+%jd records in\n", infull, inpart);
+	fprintf(stderr, "%jd+%jd records out\n", outfull, outpart);
 
 	fprintf(stderr, "%s total bytes copied\n", mu_humansize(tbytes, 1024));
 }
diff --git a/src/coreutils/df/df.c b/src/coreutils/df/df.c
index ea7f61b..b5d988d 100644
--- a/src/coreutils/df/df.c
+++ b/src/coreutils/df/df.c
@@ -69,7 +69,7 @@ int main(int argc, char **argv) {
 		off_t capacity = (used * 100 + 1) / (avail + used + 1);
 
 		if (!h_flag)
-			printf("%-20s %12ju %12ju %12ju %12ju%% %s\n", me->mnt_fsname, total, used, avail, capacity, me->mnt_dir);
+			printf("%-20s %12jd %12jd %12jd %12jd%% %s\n", me->mnt_fsname, total, used, avail, capacity, me->mnt_dir);
 
 		else {
 			char total_s[MU_HUMAN_BUF_SIZE + 1];
@@ -80,7 +80,7 @@ int main(int argc, char **argv) {
 			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);
+			printf("%-20s %10s %9s %9s %3jd%% %s\n", me->mnt_fsname, total_s, used_s, avail_s, capacity, me->mnt_dir);
 		}
 	}
 
diff --git a/src/coreutils/head/head.c b/src/coreutils/head/head.c
index 9c7d90a..5928409 100644
--- a/src/coreutils/head/head.c
+++ b/src/coreutils/head/head.c
@@ -33,9 +33,10 @@ void print(const char *file, FILE *fp, long lines, long bytes) {
 		if (c == '\n')
 			lcount++;
 
-		putchar(c);
 		if (c == EOF || lcount == lines || (c_flag && bcount == bytes))
 			break;
+
+		putchar(c);
 	}
 }
 
diff --git a/src/coreutils/id/id.c b/src/coreutils/id/id.c
index 77a9e70..c6e3d5d 100644
--- a/src/coreutils/id/id.c
+++ b/src/coreutils/id/id.c
@@ -32,7 +32,7 @@ int print_groups(const struct passwd *pwd, const char *fmt, const int flag) {
 	for (int i = 0; i < ngroups; i++) {
 		struct group *grp = getgrgid(groups[i]);
 		if (grp && !n_flag)
-			printf("%d", groups[i]);
+			printf("%u", groups[i]);
 
 		if ((!r_flag && n_flag) || flag)
 			printf(fmt, grp->gr_name);
@@ -53,7 +53,7 @@ int ids(uid_t uid, struct passwd *pwd) {
 			printf("%s", pwd->pw_name);
 
 		else
-			printf("%d", uid);
+			printf("%u", uid);
 	}
 
 	else if (G_flag || g_flag)
diff --git a/src/coreutils/ls/ls.c b/src/coreutils/ls/ls.c
index 033f68b..0ae1d24 100644
--- a/src/coreutils/ls/ls.c
+++ b/src/coreutils/ls/ls.c
@@ -80,6 +80,8 @@ struct d_node **list(const char *path, size_t *nfiles, int *ret) {
 
 	DIR *dp = opendir(path);
 	if (dp == NULL) {
+		free(dir);
+
 		fprintf(stderr, "ls: %s: %s\n", path, strerror(errno));
 		return NULL;
 	}
@@ -145,11 +147,11 @@ void dfree(struct d_node **dir, size_t files) {
 }
 
 char *get_date(time_t mtime) {
-	static char time[100];
+	static char date[100];
 
-	strftime(time, sizeof(time), "%b %d %H:%M", localtime(&mtime));
+	strftime(date, sizeof(date), "%b %d %H:%M", localtime(&mtime));
 
-	return time;
+	return date;
 }
 
 /* Print */
@@ -196,7 +198,7 @@ int print(const struct d_node *node) {
 
 	int ret = 0;
 	if (i_flag)
-		ret += printf("%7ju ", (uintmax_t)node->stats.st_ino);
+		ret += printf("%7jd ", node->stats.st_ino);
 
 	if (s_flag) {
 		off_t size = 512 * node->stats.st_blocks;
@@ -204,7 +206,7 @@ int print(const struct d_node *node) {
 			ret += printf("%7s ", mu_humansize(size, 1024));
 
 		else
-			ret += printf("%7ju ", (uintmax_t)size / 1024);
+			ret += printf("%7jd ", size / 1024);
 	}
 
 	if (l_flag) {
@@ -216,10 +218,10 @@ int print(const struct d_node *node) {
 		char *gr_name = (gr != 0) ? gr->gr_name : "nobody";
 		char *pw_name = (pw != 0) ? pw->pw_name : "nobody";
 		if (h_flag)
-			ret += printf(" %4ju %4s %6s %6s %s ", (uintmax_t)node->stats.st_nlink, pw_name, gr_name, mu_humansize(node->stats.st_size, 1024), get_date(node->stats.st_mtime));
+			ret += printf(" %4u %4s %6s %6s %s ", node->stats.st_nlink, pw_name, gr_name, mu_humansize(node->stats.st_size, 1024), get_date(node->stats.st_mtime));
 
 		else
-			ret += printf(" %4ju %4s %6s %10jd %s ", (uintmax_t)node->stats.st_nlink, pw_name, gr_name, (uintmax_t)node->stats.st_size, get_date(node->stats.st_mtime));
+			ret += printf(" %4u %4s %6s %10ld %s ", node->stats.st_nlink, pw_name, gr_name, node->stats.st_size, get_date(node->stats.st_mtime));
 	}
 
 	if (c_flag && p_flag)
diff --git a/src/coreutils/mkdir/mkdir.c b/src/coreutils/mkdir/mkdir.c
index 2d34675..d3b1c1e 100644
--- a/src/coreutils/mkdir/mkdir.c
+++ b/src/coreutils/mkdir/mkdir.c
@@ -21,7 +21,7 @@ int do_mkdir(const char *path) {
 	}
 
 	else if (v_flag)
-		printf("mkdir: %s created with mode %d\n", path, mode);
+		printf("mkdir: %s created with mode %u\n", path, mode);
 
 	return 0;
 }
diff --git a/src/coreutils/nl/nl.c b/src/coreutils/nl/nl.c
index 5f9cd6a..0115edd 100644
--- a/src/coreutils/nl/nl.c
+++ b/src/coreutils/nl/nl.c
@@ -24,7 +24,7 @@ int nl(const char *path) {
 	size_t size = 0;
 	while (getline(&buf, &size, fp) != EOF) {
 		if (strlen(buf) > 1)
-			fprintf(stdout, "%*u\t%s", w_flag, lines++, buf);
+			fprintf(stdout, "%*d\t%s", w_flag, lines++, buf);
 
 		else
 			fprintf(stdout, "%*s\t%s", w_flag, " ", buf);
diff --git a/src/coreutils/rm/rm.c b/src/coreutils/rm/rm.c
index 7ebd56a..616b269 100644
--- a/src/coreutils/rm/rm.c
+++ b/src/coreutils/rm/rm.c
@@ -17,9 +17,7 @@ char v_flag;
 int verbose(const char *path) {
 	if (v_flag) {
 		fprintf(stderr, "rm: remove %s? [y/n] ", path);
-
 		fflush(stderr);
-		fflush(stdin);
 
 		int c = 0;
 		int key = 0;
diff --git a/src/coreutils/setsid/setsid.c b/src/coreutils/setsid/setsid.c
index 87580c8..09d5bb1 100644
--- a/src/coreutils/setsid/setsid.c
+++ b/src/coreutils/setsid/setsid.c
@@ -13,8 +13,7 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
-	pid_t pid;
-	if ((pid = fork()) != 0)
+	if (fork() != 0)
 		return 0;
 
 	setsid();
diff --git a/src/coreutils/split/split.c b/src/coreutils/split/split.c
index e2d3270..8b2243d 100644
--- a/src/coreutils/split/split.c
+++ b/src/coreutils/split/split.c
@@ -52,15 +52,17 @@ int main(int argc, char **argv) {
 			case 'b':
 				switch (optarg[strlen(optarg) - 1]) {
 					case 'm':
-						size = atoi(optarg) * 1048576;
+						sscanf(optarg, "%ld", &size);
+						size *= 1048576;
 						break;
 
 					case 'k':
-						size = atoi(optarg) * 1024;
+						sscanf(optarg, "%ld", &size);
+						size *= 1024;
 						break;
 
 					default:
-						size = atoi(optarg);
+						sscanf(optarg, "%ld", &size);
 						break;
 				}
 
diff --git a/src/init/init/init.c b/src/init/init/init.c
index 0274f8e..ac4ff31 100644
--- a/src/init/init/init.c
+++ b/src/init/init/init.c
@@ -23,8 +23,7 @@ void poweroff(int sig) {
 }
 
 void execute(char *argv[]) {
-	pid_t pid;
-	if ((pid = fork()) == 0) {
+	if (fork() == 0) {
 		setsid();
 		execvp(argv[0], argv);
 
diff --git a/src/loginutils/login/login.c b/src/loginutils/login/login.c
index 44123de..fc27859 100644
--- a/src/loginutils/login/login.c
+++ b/src/loginutils/login/login.c
@@ -7,7 +7,6 @@
 #include <unistd.h>
 #include <signal.h>
 #include <termios.h>
-#include "get_string.h"
 #include "pw_check.h"
 
 #define ECHOFLAGS (ECHO | ECHOE | ECHOK | ECHONL)
@@ -53,9 +52,13 @@ struct passwd *proccess_input(char *hostname) {
 	/* Username */
 	printf("Login on %s: ", hostname);
 	fflush(stdout);
-	if (!mu_get_string("login", user, sizeof(user)))
+
+	off_t ret = 0;
+	if ((ret = read(STDIN_FILENO, user, sizeof(user))) <= 0)
 		return NULL;
 
+	user[ret - 1] = '\0';
+
 	struct passwd *pw = getpwnam(user);
 	if (!pw) {
 		fprintf(stderr, "login: Incorrent username\n");
@@ -68,9 +71,10 @@ struct passwd *proccess_input(char *hostname) {
 	if (hide_input(STDIN_FILENO, 1))
 		return NULL;
 
-	if (!mu_get_string("login", psswd, sizeof(psswd)))
+	if ((ret = read(STDIN_FILENO, psswd, sizeof(psswd))) <= 0)
 		return NULL;
 
+	psswd[ret - 1] = '\0';
 	printf("\n");
 	if (pw_check("login", pw, psswd)) {
 		memset(psswd, '\0', sizeof(psswd));
diff --git a/src/procps/uptime/uptime.c b/src/procps/uptime/uptime.c
index 80574c0..4ff0b24 100644
--- a/src/procps/uptime/uptime.c
+++ b/src/procps/uptime/uptime.c
@@ -20,7 +20,7 @@ int main(void) {
 	time(&current_secs);
 
 	struct tm *current_time = localtime(&current_secs);
-	printf("%02u:%02u:%02u  ", current_time->tm_hour, current_time->tm_min, current_time->tm_sec);
+	printf("%02d:%02d:%02d  ", current_time->tm_hour, current_time->tm_min, current_time->tm_sec);
 
 	/* How long system has beep up */
 	struct timespec uptime;