1 files changed, 124 insertions, 0 deletions

diff --git a/busybox/modutils/rmmod.c b/busybox/modutils/rmmod.c
new file mode 100644
index 000000000..f4e65d0ce
--- /dev/null
+++ b/busybox/modutils/rmmod.c
@@ -0,0 +1,124 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini rmmod implementation for busybox
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/syscall.h>
+#include "busybox.h"
+
+#ifdef CONFIG_FEATURE_2_6_MODULES
+static inline void filename2modname(char *modname, const char *filename)
+{
+        const char *afterslash;
+        unsigned int i;
+
+        afterslash = strrchr(filename, '/');
+        if (!afterslash)
+                afterslash = filename;
+        else
+                afterslash++;
+
+        /* Convert to underscores, stop at first . */
+        for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
+                if (afterslash[i] == '-')
+                        modname[i] = '_';
+                else
+                        modname[i] = afterslash[i];
+        }
+        modname[i] = '\0';
+}
+#endif
+
+extern int rmmod_main(int argc, char **argv)
+{
+        int n, ret = EXIT_SUCCESS;
+        size_t nmod = 0; /* number of modules */
+        size_t pnmod = -1; /* previous number of modules */
+        unsigned int flags = O_NONBLOCK|O_EXCL;
+#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
+        void *buf; /* hold the module names which we ignore but must get */
+        size_t bufsize = 0;
+#endif
+
+        /* Parse command line. */
+        while ((n = getopt(argc, argv, "a")) != EOF) {
+                switch (n) {
+                        case 'w':       // --wait
+                                flags &= ~O_NONBLOCK;
+                                break;
+                        case 'f':       // --force
+                                flags |= O_TRUNC;
+                                break;
+                        case 'a':
+                                /* Unload _all_ unused modules via NULL delete_module() call */
+                                /* until the number of modules does not change */
+#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
+                                buf = xmalloc(bufsize = 256);
+#endif
+                                while (nmod != pnmod) {
+                                        if (syscall(__NR_delete_module, NULL, flags) < 0) {
+                                                if (errno==EFAULT)
+                                                        return(ret);
+                                                bb_perror_msg_and_die("rmmod");
+                                        }
+                                        pnmod = nmod;
+#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
+                                        /* 1 == QM_MODULES */
+                                        if (my_query_module(NULL, 1, &buf, &bufsize, &nmod)) {
+                                                bb_perror_msg_and_die("QM_MODULES");
+                                        }
+#endif
+                                }
+#if defined CONFIG_FEATURE_CLEAN_UP && CONFIG_FEATURE_QUERY_MODULE_INTERFACE
+                                free(buf);
+#endif
+                                return EXIT_SUCCESS;
+                        default:
+                                bb_show_usage();
+                }
+        }
+
+        if (optind == argc)
+                bb_show_usage();
+
+        {
+                for (n = optind; n < argc; n++) {
+#ifdef CONFIG_FEATURE_2_6_MODULES
+                        char module_name[strlen(argv[n]) + 1];
+                        filename2modname(module_name, argv[n]);
+#else
+#define module_name             argv[n]
+#endif
+                        if (syscall(__NR_delete_module, module_name, flags) < 0) {
+                                bb_perror_msg("%s", argv[n]);
+                                ret = EXIT_FAILURE;
+                        }
+                }
+        }
+
+        return(ret);
+}