mirror of
https://github.com/topjohnwu/ndk-busybox.git
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80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini rmmod implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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* Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config RMMOD
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//config: bool "rmmod"
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//config: default y
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//config: select PLATFORM_LINUX
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//config: help
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//config: rmmod is used to unload specified modules from the kernel.
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//applet:IF_RMMOD(IF_NOT_MODPROBE_SMALL(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP)))
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//kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y)
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//kbuild:lib-$(CONFIG_RMMOD) += rmmod.o modutils.o
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//kbuild:endif
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//usage:#if !ENABLE_MODPROBE_SMALL
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//usage:#define rmmod_trivial_usage
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//usage: "[-wfa] [MODULE]..."
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//usage:#define rmmod_full_usage "\n\n"
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//usage: "Unload kernel modules\n"
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//usage: "\n -w Wait until the module is no longer used"
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//usage: "\n -f Force unload"
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//usage: "\n -a Remove all unused modules (recursively)"
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//usage:#define rmmod_example_usage
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//usage: "$ rmmod tulip\n"
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//usage:#endif
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#include "libbb.h"
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#include "modutils.h"
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int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int rmmod_main(int argc UNUSED_PARAM, char **argv)
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{
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int n, err;
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unsigned flags = O_NONBLOCK | O_EXCL;
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/* Parse command line. */
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n = getopt32(argv, "wfas"); // -s ignored
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argv += optind;
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if (n & 1) // --wait
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flags &= ~O_NONBLOCK;
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if (n & 2) // --force
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flags |= O_TRUNC;
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if (n & 4) {
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/* Unload _all_ unused modules via NULL delete_module() call */
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err = bb_delete_module(NULL, flags);
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if (err && err != EFAULT)
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bb_perror_msg_and_die("rmmod");
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return EXIT_SUCCESS;
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}
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if (!*argv)
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bb_show_usage();
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n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
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while (*argv) {
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char modname[MODULE_NAME_LEN];
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const char *bname;
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bname = bb_basename(*argv++);
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if (n)
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safe_strncpy(modname, bname, MODULE_NAME_LEN);
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else
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filename2modname(bname, modname);
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err = bb_delete_module(modname, flags);
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if (err)
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bb_perror_msg_and_die("can't unload module '%s'",
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modname);
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}
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return EXIT_SUCCESS;
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}
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