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Diffstat (limited to 'i/pc104/initrd/conf/busybox/modutils/rmmod.c')
-rw-r--r--i/pc104/initrd/conf/busybox/modutils/rmmod.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/modutils/rmmod.c b/i/pc104/initrd/conf/busybox/modutils/rmmod.c
new file mode 100644
index 0000000..0a67b89
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/modutils/rmmod.c
@@ -0,0 +1,97 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini rmmod implementation for busybox
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "busybox.h"
+#include <sys/syscall.h>
+
+#ifdef CONFIG_FEATURE_2_6_MODULES
+static inline void filename2modname(char *modname, const char *afterslash)
+{
+ unsigned int i;
+ int kr_chk = 1;
+
+ if (ENABLE_FEATURE_2_4_MODULES
+ && get_linux_version_code() <= KERNEL_VERSION(2,6,0))
+ kr_chk = 0;
+
+ /* Convert to underscores, stop at first . */
+ for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
+ if (kr_chk && (afterslash[i] == '-'))
+ modname[i] = '_';
+ else
+ modname[i] = afterslash[i];
+ }
+ modname[i] = '\0';
+}
+#else
+void filename2modname(char *modname, const char *afterslash);
+#endif
+
+// There really should be a header file for this...
+
+int query_module(const char *name, int which, void *buf,
+ size_t bufsize, size_t *ret);
+
+int rmmod_main(int argc, char **argv);
+int rmmod_main(int argc, char **argv)
+{
+ int n, ret = EXIT_SUCCESS;
+ unsigned int flags = O_NONBLOCK|O_EXCL;
+
+ /* Parse command line. */
+ n = getopt32(argc, argv, "wfa");
+ 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 */
+ /* until the number of modules does not change */
+ size_t nmod = 0; /* number of modules */
+ size_t pnmod = -1; /* previous number of modules */
+
+ while (nmod != pnmod) {
+ if (syscall(__NR_delete_module, NULL, flags) != 0) {
+ if (errno == EFAULT)
+ return ret;
+ bb_perror_msg_and_die("rmmod");
+ }
+ pnmod = nmod;
+ // the 1 here is QM_MODULES.
+ if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL,
+ 1, bb_common_bufsiz1, sizeof(bb_common_bufsiz1),
+ &nmod))
+ {
+ bb_perror_msg_and_die("QM_MODULES");
+ }
+ }
+ return EXIT_SUCCESS;
+ }
+
+ if (optind == argc)
+ bb_show_usage();
+
+ for (n = optind; n < argc; n++) {
+ if (ENABLE_FEATURE_2_6_MODULES) {
+ const char *afterslash;
+
+ afterslash = strrchr(argv[n], '/');
+ if (!afterslash) afterslash = argv[n];
+ else afterslash++;
+ filename2modname(bb_common_bufsiz1, afterslash);
+ }
+
+ if (syscall(__NR_delete_module, ENABLE_FEATURE_2_6_MODULES ? bb_common_bufsiz1 : argv[n], flags)) {
+ bb_perror_msg("%s", argv[n]);
+ ret = EXIT_FAILURE;
+ }
+ }
+
+ return ret;
+}