diff --git a/TODO b/TODO
index eb123b1..5336dad 100644
--- a/TODO
+++ b/TODO
@@ -1,7 +1,6 @@
 With "micro-" prefix
 
 *Todo:
-*echo
 tail
 expr
 uniq
@@ -54,7 +53,7 @@ Modutils (linux only):
 Findutils:
  grep
  find
- *xargs (-r flag)
+
 Shell:
  rc - run command (1 2 3 ~ | <> <<>> & * " parsing) (sig handler)
 
@@ -63,3 +62,4 @@ Init:
 
 BUGS:
 	ls (unicode strlen, -l flag col)
+	xargs (getopt with glibc)
diff --git a/config.h b/config.h
index 2053327..e462d79 100644
--- a/config.h
+++ b/config.h
@@ -31,6 +31,8 @@
 
 /* Max args (xargs) */
 #define NARGS 1024
+
+/* Arg size (xargs) */
 #define ARG_SIZE 1024
 
 /* Default cmd (xargs) */
diff --git a/coreutils/cat.c b/coreutils/cat.c
index 30528a9..33da0b5 100644
--- a/coreutils/cat.c
+++ b/coreutils/cat.c
@@ -19,7 +19,10 @@ int cat(const char *path) {
 	char buf[BUF_SIZE + 1];
 	off_t len = 0;
 	while ((len = read(fd, buf, sizeof(buf))) > 0)
-		write(STDOUT_FILENO, buf, len);
+		if (write(STDOUT_FILENO, buf, len) != len) {
+			fprintf(stderr, "cat: %s\n", strerror(errno));
+			return 1;
+		}
 
 	if (strcmp(path, "-"))
 		close(fd);
diff --git a/coreutils/chroot.c b/coreutils/chroot.c
index 99a5910..93d08b6 100644
--- a/coreutils/chroot.c
+++ b/coreutils/chroot.c
@@ -15,7 +15,7 @@ int main(const int argc, char **argv) {
 		return 1;
 	}
 
-	chdir("/");
+	(void)chdir("/");
 	if (execvp(argv[2], argv + 2) < 0) {
 		fprintf(stderr, "chroot: %s\n", strerror(errno));
 		return 1;
diff --git a/coreutils/shred.c b/coreutils/shred.c
index 235b402..70c7116 100644
--- a/coreutils/shred.c
+++ b/coreutils/shred.c
@@ -26,7 +26,7 @@ int shred(int rand_fd, int fd) {
 	}
 
 	for (unsigned int n = 0; n < n_loops; n++) {
-		read(rand_fd, buf, size);
+		(void)read(rand_fd, buf, size);
 		fsync(fd);
 	}
 
diff --git a/coreutils/tee.c b/coreutils/tee.c
index fbf2403..3146854 100644
--- a/coreutils/tee.c
+++ b/coreutils/tee.c
@@ -42,10 +42,10 @@ int main(int argc, char **argv) {
 	char buf[BUF_SIZE + 1];
 	off_t bytes = 0;
 	while ((bytes = read(STDIN_FILENO, buf, sizeof(buf)))) {
-		write(STDOUT_FILENO, buf, bytes);
+		(void)write(STDOUT_FILENO, buf, bytes);
 
 		if (argc > 0)
-			write(fd, buf, bytes);
+			(void)write(fd, buf, bytes);
 	}
 
 	if (argc > 0)
diff --git a/sysutils/nologin.c b/loginutils/nologin.c
similarity index 100%
rename from sysutils/nologin.c
rename to loginutils/nologin.c
diff --git a/sysutils-linux/dmesg.c b/sysutils-linux/dmesg.c
index 9e79c98..f353da2 100644
--- a/sysutils-linux/dmesg.c
+++ b/sysutils-linux/dmesg.c
@@ -57,7 +57,7 @@ int main(int argc, char **argv) {
 
 
 	/* Print */
-	write(STDOUT_FILENO, buf, n);
+	(void)write(STDOUT_FILENO, buf, n);
 	putchar('\n');
 
 	free(buf);