sed: n cmd must reset "we had successful subst" flag. closes bug 1214.

[oweals/busybox.git] / modutils / rmmod.c

diff --git a/modutils/rmmod.c b/modutils/rmmod.c
index 7d3eac51ee1d58f36e9544d1f8f758716ca1b20f..61cfbd1473ae6bfcd7e488c96d3240667c9f1f2f 100644 (file)
--- a/modutils/rmmod.c
+++ b/modutils/rmmod.c
@@ -1,73 +1,94 @@
+/* vi: set sw=4 ts=4: */
 /*
  * Mini rmmod implementation for busybox
  *
- * Copyright (C) 1999 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.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
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include "internal.h"
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
+#include "libbb.h"
 #include <sys/syscall.h>
 
+#if ENABLE_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;
 
-/* And the system call of the day is...  */
-extern int delete_module (const char * __name);
+       /* 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...
 
-static const char rmmod_usage[] =
-    "rmmod [OPTION]... [MODULE]...\n\n"
-    "Unloads the specified kernel modules from the kernel.\n\n"
-    "Options:\n"
-    "\t-a\tTry to remove all unused kernel modules.\n";
+int query_module(const char *name, int which, void *buf,
+                       size_t bufsize, size_t *ret);
 
+int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int rmmod_main(int argc, char **argv)
+{
+       int n, ret = EXIT_SUCCESS;
+       unsigned int flags = O_NONBLOCK|O_EXCL;
 
+#define misc_buf bb_common_bufsiz1
 
-extern int rmmod_main(int argc, char **argv)
-{
-    if (argc<=1) {
-       usage(rmmod_usage);
-    }
+       /* Parse command line. */
+       n = getopt32(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 */
 
-    /* Parse any options */
-    while (--argc > 0 && **(++argv) == '-') {
-       while (*(++(*argv))) {
-           switch (**argv) {
-           case 'a':
-               /* Unload _all_ modules via NULL delete_module() call */
-               if (delete_module(NULL)) {
-                   perror("rmmod");
-                   exit( FALSE);
+               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, misc_buf, sizeof(misc_buf),
+                                       &nmod))
+                       {
+                               bb_perror_msg_and_die("QM_MODULES");
+                       }
                }
-               exit( TRUE);
-           default:
-               usage(rmmod_usage);
-           }
+               return EXIT_SUCCESS;
        }
-    }
 
-    while (argc-- > 0 ) {
-       if (delete_module(*argv) < 0) {
-           perror(*argv);
+       if (optind == argc)
+               bb_show_usage();
+
+       for (n = optind; n < argc; n++) {
+               if (ENABLE_FEATURE_2_6_MODULES) {
+                       filename2modname(misc_buf, bb_basename(argv[n]));
+               }
+
+               if (syscall(__NR_delete_module, ENABLE_FEATURE_2_6_MODULES ? misc_buf : argv[n], flags)) {
+                       bb_simple_perror_msg(argv[n]);
+                       ret = EXIT_FAILURE;
+               }
        }
-       argv++;
-    }
-    exit( TRUE);
+
+       return ret;
 }