diff options
Diffstat (limited to 'busybox/modutils/rmmod.c')
| -rw-r--r-- | busybox/modutils/rmmod.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/busybox/modutils/rmmod.c b/busybox/modutils/rmmod.c new file mode 100644 index 0000000..f4e65d0 --- /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); +} |