core/head: Fix a tiny typo (that introduced a bug) and a segmentation fault

Those bugs were basically introduced by typos...

First bug
---------
`head` was checking if argc was less than 2, which is incorrect because
after getopt() is ran, argc would be equal to 1 if ran this way:

    $ head file

As such, it would read standard input, then the file, which is a bug.

Second bug
----------
The file got closed after the first line was read. When trying to read
the (now closed) file it returns a segmentation fault.

Signed-off-by: Ferass El Hafidi <vitali64pmemail@protonmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/core/head.c b/core/head.c
index 8dd19e8..76bb9d9 100644
--- a/core/head.c
+++ b/core/head.c
@@ -29,7 +29,7 @@ int main(int argc, char *const argv[]) {
 		else
 			lines = 10;
 	} argc -= optind; argv += optind;
-	if (argc < 2) {
+	if (argc < 1) {
 		while (read(STDIN_FILENO, s, 4096) > 0)
 			printf("%s", s);
 	}
@@ -44,8 +44,8 @@ int main(int argc, char *const argv[]) {
 				printf("%s", s);
 			else if (errno)
 				return errprint(argv0, "fgets()", errno);
-			fclose(file);
 		}
+		fclose(file);
 	}
 	return 0;
 }