Add rmmod(8)

No manpage yet.

Makefile

@@ -18,7 +18,8 @@ SRC = \
 
 ifeq ($(OS),linux)
 SRC += \
-	insmod.c
+	insmod.c            \
+	rmmod.c
 endif
 
 OBJ = $(SRC:.c=.o) $(LIB)

rmmod.c

@@ -0,0 +1,47 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <libgen.h>
+#include "util.h"
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-fw] modulename...\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	char *mod, *p;
+	int i;
+	int flags = O_NONBLOCK;
+
+	ARGBEGIN {
+	case 'f':
+		flags |= O_TRUNC;
+		break;
+	case 'w':
+		flags &= ~O_NONBLOCK;
+		break;
+	default:
+		usage();
+	} ARGEND;
+
+	if (argc < 1)
+		usage();
+
+	for (i = 0; i < argc; i++) {
+		mod = argv[i];
+		p = strrchr(mod, '.');
+		if (strlen(p) == 3 && !strcmp(p, ".ko"))
+			*p = '\0';
+		if (syscall(__NR_delete_module, mod, flags) < 0)
+			eprintf("delete_module:");
+	}
+
+	return 0;
+}