Annotation of /trunk/mkinitrd-magellan/busybox/modutils/rmmod.c
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Revision 532 -
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 2381 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | niro | 532 | /* 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 <sys/syscall.h> | ||
12 | |||
13 | #ifdef CONFIG_FEATURE_2_6_MODULES | ||
14 | static inline void filename2modname(char *modname, const char *afterslash) | ||
15 | { | ||
16 | unsigned int i; | ||
17 | int kr_chk = 1; | ||
18 | |||
19 | if (ENABLE_FEATURE_2_4_MODULES | ||
20 | && get_linux_version_code() <= KERNEL_VERSION(2,6,0)) | ||
21 | kr_chk = 0; | ||
22 | |||
23 | /* Convert to underscores, stop at first . */ | ||
24 | for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) { | ||
25 | if (kr_chk && (afterslash[i] == '-')) | ||
26 | modname[i] = '_'; | ||
27 | else | ||
28 | modname[i] = afterslash[i]; | ||
29 | } | ||
30 | modname[i] = '\0'; | ||
31 | } | ||
32 | #else | ||
33 | void filename2modname(char *modname, const char *afterslash); | ||
34 | #endif | ||
35 | |||
36 | // There really should be a header file for this... | ||
37 | |||
38 | int query_module(const char *name, int which, void *buf, | ||
39 | size_t bufsize, size_t *ret); | ||
40 | |||
41 | int rmmod_main(int argc, char **argv) | ||
42 | { | ||
43 | int n, ret = EXIT_SUCCESS; | ||
44 | unsigned int flags = O_NONBLOCK|O_EXCL; | ||
45 | |||
46 | /* Parse command line. */ | ||
47 | n = getopt32(argc, argv, "wfa"); | ||
48 | if((n & 1)) // --wait | ||
49 | flags &= ~O_NONBLOCK; | ||
50 | if((n & 2)) // --force | ||
51 | flags |= O_TRUNC; | ||
52 | if((n & 4)) { | ||
53 | /* Unload _all_ unused modules via NULL delete_module() call */ | ||
54 | /* until the number of modules does not change */ | ||
55 | size_t nmod = 0; /* number of modules */ | ||
56 | size_t pnmod = -1; /* previous number of modules */ | ||
57 | |||
58 | while (nmod != pnmod) { | ||
59 | if (syscall(__NR_delete_module, NULL, flags) != 0) { | ||
60 | if (errno == EFAULT) | ||
61 | return ret; | ||
62 | bb_perror_msg_and_die("rmmod"); | ||
63 | } | ||
64 | pnmod = nmod; | ||
65 | // the 1 here is QM_MODULES. | ||
66 | if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL, | ||
67 | 1, bb_common_bufsiz1, sizeof(bb_common_bufsiz1), | ||
68 | &nmod)) | ||
69 | { | ||
70 | bb_perror_msg_and_die("QM_MODULES"); | ||
71 | } | ||
72 | } | ||
73 | return EXIT_SUCCESS; | ||
74 | } | ||
75 | |||
76 | if (optind == argc) | ||
77 | bb_show_usage(); | ||
78 | |||
79 | for (n = optind; n < argc; n++) { | ||
80 | if (ENABLE_FEATURE_2_6_MODULES) { | ||
81 | const char *afterslash; | ||
82 | |||
83 | afterslash = strrchr(argv[n], '/'); | ||
84 | if (!afterslash) afterslash = argv[n]; | ||
85 | else afterslash++; | ||
86 | filename2modname(bb_common_bufsiz1, afterslash); | ||
87 | } | ||
88 | |||
89 | if (syscall(__NR_delete_module, ENABLE_FEATURE_2_6_MODULES ? bb_common_bufsiz1 : argv[n], flags)) { | ||
90 | bb_perror_msg("%s", argv[n]); | ||
91 | ret = EXIT_FAILURE; | ||
92 | } | ||
93 | } | ||
94 | |||
95 | return ret; | ||
96 | } |