on second thought, an AWK script is fine

2 files changed, 12 insertions, 45 deletions

diff --git a/tac b/tac
new file mode 100755
index 0000000..d4261a7
--- /dev/null
+++ b/tac
@@ -0,0 +1,12 @@
+cat "$@" | awk "$(tail -n +3 $0)"
+exit $?
+
+{
+	lines[NR] = $0;
+}
+
+END {
+	for (i = NR; i > 0; i--) {
+		print lines[i]
+	}
+}
diff --git a/tac.c b/tac.c
deleted file mode 100644
index 088ebda..0000000
--- a/tac.c
+++ /dev/null
@@ -1,45 +0,0 @@
-#define _POSIX_C_SOURCE 200809L
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-struct line {
-	struct line *prev;
-	struct line *next;
-	char *line;
-};
-
-int tac(const char *path)
-{
-	FILE *f = stdin;
-	if (path && strcmp(path, "-") != 0) {
-		f = fopen(path, "r");
-		if (f == NULL) {
-			perror("tac:fopen");
-		}
-	}
-
-	/* read lines into doubly-linked list */
-	/* print lines in reverse order */
-
-	if (f != stdin) {
-		fclose(f);
-	}
-
-	return 0;
-}
-
-int main(int argc, char *argv[])
-{
-	while (getopt(argc, argv, "") != -1) {
-		/* no options supported */
-		return 1;
-	}
-
-	int ret = 0;
-	do {
-		ret |= tac(argv[optind]);
-	} while (argv[++optind]);
-	return 1;
-}