rev fix, nl add

coreutils/nl.c

@@ -0,0 +1,66 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include "config.h"
+
+unsigned int w_flag = 2;
+unsigned int lines = 1;
+
+int nl(const char *path) {
+	FILE *fp = stdin;
+
+	if (strcmp(path, "-"))
+		fp = fopen(path, "r");
+
+	if (fp == NULL) {
+		fprintf(stderr, "rev: %s: %s\n", path, strerror(errno));
+		return 1;
+	}
+
+	char buf[BUF_SIZE + 1];
+	while (fgets(buf, sizeof(buf), fp))
+		if (strlen(buf) > 1)
+			fprintf(stdout, "%*u\t%s", w_flag, lines++, buf);
+
+	putchar('\n');
+	if (strcmp(path, "-"))
+		fclose(fp);
+
+	return 0;
+}
+
+int main(int argc, char **argv) {
+	int opt;
+	while ((opt = getopt(argc, argv, "w:v:")) != -1) {
+		switch (opt) {
+			case 'w':
+				w_flag = atoi(optarg);
+				break;
+
+			case 'v':
+				lines = atoi(optarg);
+				break;
+
+			default:
+				printf("nl [file1 file2...]\n\t[-w N Width of line numbers]\n\t[-v N Start from N]\n");
+				return 0;
+		}
+	}
+
+	argv += optind;
+	argc -= optind;
+
+	if (argc == 0)
+		return nl("-");
+
+	else {
+		int ret = 0;
+		for (int i = 0; i < argc; i++)
+			if (nl(argv[i]))
+				ret = 1;
+
+		return ret;
+	}
+}

sysutils/nologin.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(void) {
+	printf("nologin: shell disabled\n");
+	return 0;
+}

sysutils/rev.c

@@ -16,7 +16,7 @@ void strrev(char *str, off_t len) {
 	}
 }
 
-int cat(const char *path) {
+int rev(const char *path) {
 	FILE *fp = stdin;
 
 	if (strcmp(path, "-"))
@@ -51,8 +51,8 @@ int main(int argc, char **argv) {
 	argc -= optind;
 
 	if (argc == 0)
-		return cat("-");
+		return rev("-");
 
 	else
-		return cat(argv[0]);
+		return rev(argv[0]);
 }