source: MondoRescue/trunk/mindi-busybox/modutils/rmmod.c@ 929

Last change on this file since 929 was 821, checked in by Bruno Cornec, 18 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 2.5 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini rmmod implementation for busybox
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 */
9
10#include "busybox.h"
11#include <stdio.h>
12#include <errno.h>
13#include <unistd.h>
14#include <stdlib.h>
15#include <getopt.h>
16#include <fcntl.h>
17#include <string.h>
18#include <sys/utsname.h>
19#include <sys/syscall.h>
20
21#ifdef CONFIG_FEATURE_2_6_MODULES
22static inline void filename2modname(char *modname, const char *afterslash)
23{
24 unsigned int i;
25
26#if ENABLE_FEATURE_2_4_MODULES
27 int kr_chk = 1;
28 if (get_linux_version_code() <= KERNEL_VERSION(2,6,0))
29 kr_chk = 0;
30#else
31#define kr_chk 1
32#endif
33
34 /* Convert to underscores, stop at first . */
35 for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
36 if (kr_chk && (afterslash[i] == '-'))
37 modname[i] = '_';
38 else
39 modname[i] = afterslash[i];
40 }
41 modname[i] = '\0';
42}
43#endif
44
45int rmmod_main(int argc, char **argv)
46{
47 int n, ret = EXIT_SUCCESS;
48 unsigned int flags = O_NONBLOCK|O_EXCL;
49#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
50 /* bb_common_bufsiz1 hold the module names which we ignore
51 but must get */
52 size_t bufsize = sizeof(bb_common_bufsiz1);
53#endif
54
55 /* Parse command line. */
56 n = bb_getopt_ulflags(argc, argv, "wfa");
57 if((n & 1)) // --wait
58 flags &= ~O_NONBLOCK;
59 if((n & 2)) // --force
60 flags |= O_TRUNC;
61 if((n & 4)) {
62 /* Unload _all_ unused modules via NULL delete_module() call */
63 /* until the number of modules does not change */
64 size_t nmod = 0; /* number of modules */
65 size_t pnmod = -1; /* previous number of modules */
66
67 while (nmod != pnmod) {
68 if (syscall(__NR_delete_module, NULL, flags) != 0) {
69 if (errno==EFAULT)
70 return(ret);
71 bb_perror_msg_and_die("rmmod");
72 }
73 pnmod = nmod;
74#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
75 /* 1 == QM_MODULES */
76 if (my_query_module(NULL, 1, &bb_common_bufsiz1, &bufsize, &nmod)) {
77 bb_perror_msg_and_die("QM_MODULES");
78 }
79#endif
80 }
81 return EXIT_SUCCESS;
82 }
83
84 if (optind == argc)
85 bb_show_usage();
86
87 for (n = optind; n < argc; n++) {
88#ifdef CONFIG_FEATURE_2_6_MODULES
89 const char *afterslash;
90 char *module_name;
91
92 afterslash = strrchr(argv[n], '/');
93 if (!afterslash)
94 afterslash = argv[n];
95 else
96 afterslash++;
97 module_name = alloca(strlen(afterslash) + 1);
98 filename2modname(module_name, afterslash);
99#else
100#define module_name argv[n]
101#endif
102 if (syscall(__NR_delete_module, module_name, flags) != 0) {
103 bb_perror_msg("%s", argv[n]);
104 ret = EXIT_FAILURE;
105 }
106 }
107
108 return(ret);
109}
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