cat fix

TODO

@@ -3,7 +3,6 @@ With "micro-" prefix
 *Todo:
 **dmesg (portable)
 **head
-**cat
 tail
 expr
 uniq

config.h

@@ -1,7 +1,7 @@
 #ifndef _CONFIG_H
 #define _CONFIG_H
 
-/* (tee wc) */
+/* (cat tee wc) */
 #define BUF_SIZE 4096
 
 /* Random source (shred) */

coreutils/cat.c

@@ -3,50 +3,34 @@
 #include <errno.h>
 #include <string.h>
 #include <unistd.h>
-
-unsigned int n_flag;
+#include "config.h"
 
 int cat(const char *path) {
-	FILE *fp = NULL;
+	int fd = STDIN_FILENO;
 
-	if (!strcmp(path, "-"))
-		fp = stdin;
+	if (strcmp(path, "-"))
+		fd = open(path, O_RDONLY);
 
-	else
-		fp = fopen(path, "r");
-
-	if (fp == NULL) {
+	if (fd < 0) {
 		fprintf(stderr, "cat: %s: %s\n", path, strerror(errno));
 		return 1;
 	}
 
-	char *buf = NULL;
-	size_t len = 0;
+	char buf[BUF_SIZE + 1];
+	off_t len = 0;
+	while ((len = read(fd, buf, sizeof(buf))) > 0)
+		write(STDOUT_FILENO, buf, len);
 
-	size_t line = 0;
-	while (getline(&buf, &len, fp) != EOF) {
-		line++;
-		if (n_flag)
-			printf("\t%zu\t%s", line, buf);
-
-		else
-			printf("%s", buf);
-	}
-
-	free(buf);
+	close(fd);
 	return 0;
 }
 
 int main(int argc, char **argv) {
 	int opt;
-	while ((opt = getopt(argc, argv, "n")) != -1) {
+	while ((opt = getopt(argc, argv, "")) != -1) {
 		switch (opt) {
-			case 'n':
-				n_flag = 1;
-				break;
-
 			default:
-				printf("cat [file1 file2]\n\t[-n number all output lines]\n");
+				printf("cat [file1 file2]\n");
 				return 0;
 		}
 	}

coreutils/truncate.c

@@ -21,7 +21,7 @@ int main(int argc, char **argv) {
 				break;
 
 			default:
-				printf("truncate [file]\n\t[-c Do not create files] [-s=SIZE]\n");
+				printf("truncate [file]\n\t[-c Do not create files] [-s SIZE]\n");
 				return 0;
 		}
 	}