hush/modutils/rmmod.c
Denys Vlasenko cd13974b20 rmmod: fix bad error message
Before:

    ># busybox_old rmmod gtrhfhdfghdf
    rmmod: can't unload 'gtrhfhdfghdf': unknown symbol in module, or unknown parameter

    After:

    ># busybox rmmod gtrhfhdfghdf
    rmmod: can't unload module 'gtrhfhdfghdf': No such file or directory

function                                             old     new   delta
modprobe_main                                        726     721      -5
do_modprobe                                          599     590      -9
rmmod_main                                           187     169     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-32)             Total: -32 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-10-24 04:17:04 +02:00

70 lines
1.8 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Mini rmmod implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//applet:IF_RMMOD(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP))
//usage:#if !ENABLE_MODPROBE_SMALL
//usage:#define rmmod_trivial_usage
//usage: "[-wfa] [MODULE]..."
//usage:#define rmmod_full_usage "\n\n"
//usage: "Unload kernel modules\n"
//usage: "\n -w Wait until the module is no longer used"
//usage: "\n -f Force unload"
//usage: "\n -a Remove all unused modules (recursively)"
//usage:#define rmmod_example_usage
//usage: "$ rmmod tulip\n"
//usage:#endif
#include "libbb.h"
#include "modutils.h"
int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int rmmod_main(int argc UNUSED_PARAM, char **argv)
{
int n, err;
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
flags |= O_TRUNC;
if (n & 4) {
/* Unload _all_ unused modules via NULL delete_module() call */
err = bb_delete_module(NULL, flags);
if (err && err != EFAULT)
bb_perror_msg_and_die("rmmod");
return EXIT_SUCCESS;
}
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];
const char *bname;
bname = bb_basename(*argv++);
if (n)
safe_strncpy(modname, bname, MODULE_NAME_LEN);
else
filename2modname(bname, modname);
err = bb_delete_module(modname, flags);
if (err)
bb_perror_msg_and_die("can't unload module '%s'",
modname);
}
return EXIT_SUCCESS;
}