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-rw-r--r--toys/other/rmmod.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/toys/other/rmmod.c b/toys/other/rmmod.c
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+/* vi: set sw=4 ts=4:
+ *
+ * rmmod.c - Remove a module from the Linux kernel.
+ *
+ * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
+ *
+ * Not in SUSv4.
+
+USE_RMMOD(NEWTOY(rmmod, "<1wf", TOYFLAG_BIN|TOYFLAG_NEEDROOT))
+
+config RMMOD
+ bool "rmmod"
+ default y
+ help
+ usage: rmmod [-wf] [MODULE]
+
+ Unload the module named MODULE from the Linux kernel.
+ -f Force unload of a module
+ -w Wait until the module is no longer used.
+
+*/
+
+#include "toys.h"
+
+#include <sys/syscall.h>
+#define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags)
+
+void rmmod_main(void)
+{
+ unsigned int flags = O_NONBLOCK|O_EXCL;
+ char * mod_name;
+ int len;
+
+ // Basename
+ mod_name = strrchr(toys.optargs[0],'/');
+ if (mod_name)
+ mod_name++;
+ else
+ mod_name = toys.optargs[0];
+
+ // Remove .ko if present
+ len = strlen(mod_name);
+ if (len > 3 && !strcmp(&mod_name[len-3], ".ko" ))
+ mod_name[len-3] = 0;
+
+ if (toys.optflags & 1) flags |= O_TRUNC;
+ if (toys.optflags & 2) flags &= ~O_NONBLOCK;
+
+ if (delete_module(mod_name, flags))
+ perror_exit("failed to unload %s", mod_name);
+}