Contents of /trunk/mkinitrd-magellan/busybox/modutils/rmmod.c
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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 | /* 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 | } |