rmmod: fix bug 263
"modutils/rmmod can't remove modules with dash in name on 2.4 kernels"

function                                             old     new   delta
rmmod_main                                           187     220     +33

diff --git a/modutils/insmod.c b/modutils/insmod.c
index 2c7f647..90ed87a 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -35,7 +35,7 @@
 
 	rc = bb_init_module(filename, parse_cmdline_module_options(argv));
 	if (rc)
-		bb_error_msg("cannot insert '%s': %s", filename, moderror(rc));
+		bb_error_msg("can't insert '%s': %s", filename, moderror(rc));
 
 	return rc;
 }
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index d3fde0e..6eb950f 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -776,7 +776,7 @@
 			USE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(options ? options : "")
 			SKIP_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE("")
 				) != 0)
-			bb_error_msg_and_die("cannot insert '%s': %s",
+			bb_error_msg_and_die("can't insert '%s': %s",
 					*argv, moderror(errno));
 		return 0;
 	}
diff --git a/modutils/modutils-24.c b/modutils/modutils-24.c
index 4b0e786..a16cb1b 100644
--- a/modutils/modutils-24.c
+++ b/modutils/modutils-24.c
@@ -3803,7 +3803,7 @@
 		if (m_has_modinfo) {
 			int m_version = new_get_module_version(f, m_strversion);
 			if (m_version == -1) {
-				bb_error_msg_and_die("cannot find the kernel version "
+				bb_error_msg_and_die("can't find the kernel version "
 					"the module was compiled for");
 			}
 		}
diff --git a/modutils/rmmod.c b/modutils/rmmod.c
index cdc690a..ee32dfd 100644
--- a/modutils/rmmod.c
+++ b/modutils/rmmod.c
@@ -15,12 +15,11 @@
 int rmmod_main(int argc UNUSED_PARAM, char **argv)
 {
 	int n;
-	unsigned int flags = O_NONBLOCK|O_EXCL;
+	unsigned flags = O_NONBLOCK | O_EXCL;
 
 	/* Parse command line. */
 	n = getopt32(argv, "wfas"); // -s ignored
 	argv += optind;
-
 	if (n & 1)	// --wait
 		flags &= ~O_NONBLOCK;
 	if (n & 2)	// --force
@@ -35,11 +34,18 @@
 	if (!*argv)
 		bb_show_usage();
 
+	n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
 	while (*argv) {
 		char modname[MODULE_NAME_LEN];
-		filename2modname(bb_basename(*argv++), modname);
+		const char *bname;
+
+		bname = bb_basename(*argv++);
+		if (n)
+			safe_strncpy(modname, bname, MODULE_NAME_LEN);
+		else
+			filename2modname(bname, modname);
 		if (bb_delete_module(modname, flags))
-			bb_error_msg_and_die("cannot unload '%s': %s",
+			bb_error_msg_and_die("can't unload '%s': %s",
 					     modname, moderror(errno));
 	}