diff options
Diffstat (limited to 'modutils')
| -rw-r--r-- | modutils/Config.src | 2 | ||||
| -rw-r--r-- | modutils/Kbuild.src | 1 | ||||
| -rw-r--r-- | modutils/modinfo.c | 150 |
3 files changed, 153 insertions, 0 deletions
diff --git a/modutils/Config.src b/modutils/Config.src index 3d02f87..2ced9b3 100644 --- a/modutils/Config.src +++ b/modutils/Config.src @@ -5,6 +5,8 @@ menu "Linux Module Utilities" +INSERT + config MODPROBE_SMALL bool "Simplified modutils" default y diff --git a/modutils/Kbuild.src b/modutils/Kbuild.src index 31f7cbf..fc0808d 100644 --- a/modutils/Kbuild.src +++ b/modutils/Kbuild.src @@ -5,6 +5,7 @@ # Licensed under the GPL v2, see the file LICENSE in this tarball. lib-y:= +INSERT lib-$(CONFIG_MODPROBE_SMALL) += modprobe-small.o lib-$(CONFIG_DEPMOD) += depmod.o modutils.o lib-$(CONFIG_INSMOD) += insmod.o modutils.o diff --git a/modutils/modinfo.c b/modutils/modinfo.c new file mode 100644 index 0000000..c68d2e9 --- /dev/null +++ b/modutils/modinfo.c @@ -0,0 +1,150 @@ +/* vi: set sw=4 ts=4: */ +/* + * modinfo - retrieve module info + * Copyright (c) 2008 Pascal Bellard + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +//applet:IF_MODINFO(APPLET(modinfo, _BB_DIR_SBIN, _BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_MODINFO) += modinfo.o + +//config:config MODINFO +//config: bool "modinfo" +//config: default y +//config: help +//config: Show information about a Linux Kernel module + +#include <fnmatch.h> +#include <sys/utsname.h> /* uname() */ +#include "libbb.h" +#include "modutils.h" + + +enum { + OPT_TAGS = (1 << 6) - 1, + OPT_F = (1 << 6), /* field name */ + OPT_0 = (1 << 7), /* \0 as separator */ +}; + +struct modinfo_env { + char *field; + int tags; +}; + +static int display(const char *data, const char *pattern, int flag) +{ + if (flag) { + int n = printf("%s:", pattern); + while (n++ < 16) + bb_putchar(' '); + } + return printf("%s%c", data, (option_mask32 & OPT_0) ? '\0' : '\n'); +} + +static void modinfo(const char *path, struct modinfo_env *env) +{ + static const char *const shortcuts[] = { + "filename", + "description", + "author", + "license", + "vermagic", + "parm", + }; + size_t len; + int j, length; + char *ptr, *the_module; + const char *field = env->field; + int tags = env->tags; + + if (tags & 1) { /* filename */ + display(path, shortcuts[0], 1 != tags); + } + len = MAXINT(ssize_t); + the_module = xmalloc_open_zipped_read_close(path, &len); + if (!the_module) + return; + if (field) + tags |= OPT_F; + for (j = 1; (1<<j) & (OPT_TAGS + OPT_F); j++) { + const char *pattern = field; + if ((1<<j) & OPT_TAGS) + pattern = shortcuts[j]; + if (!((1<<j) & tags)) + continue; + length = strlen(pattern); + ptr = the_module; + while (1) { + ptr = memchr(ptr, *pattern, len - (ptr - (char*)the_module)); + if (ptr == NULL) /* no occurance left, done */ + break; + if (strncmp(ptr, pattern, length) == 0 && ptr[length] == '=') { + ptr += length + 1; + ptr += display(ptr, pattern, (1<<j) != tags); + } + ++ptr; + } + } + free(the_module); +} + +//usage:#define modinfo_trivial_usage +//usage: "[-adlp0] [-F keyword] MODULE" +//usage:#define modinfo_full_usage "\n\n" +//usage: "Options:" +//usage: "\n -a Shortcut for '-F author'" +//usage: "\n -d Shortcut for '-F description'" +//usage: "\n -l Shortcut for '-F license'" +//usage: "\n -p Shortcut for '-F parm'" +//usage: "\n -F keyword Keyword to look for" +//usage: "\n -0 Separate output with NULs" +//usage:#define modinfo_example_usage +//usage: "$ modinfo -F vermagic loop\n" + +int modinfo_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int modinfo_main(int argc UNUSED_PARAM, char **argv) +{ + struct modinfo_env env; + char name[MODULE_NAME_LEN]; + struct utsname uts; + parser_t *p; + char *colon, *tokens[2]; + unsigned opts; + unsigned i; + + env.field = NULL; + opt_complementary = "-1"; /* minimum one param */ + opts = getopt32(argv, "fdalvpF:0", &env.field); + env.tags = opts & OPT_TAGS ? opts & OPT_TAGS : OPT_TAGS; + argv += optind; + + uname(&uts); + p = config_open2( + concat_path_file( + concat_path_file(CONFIG_DEFAULT_MODULES_DIR, uts.release), + CONFIG_DEFAULT_DEPMOD_FILE), + xfopen_for_read + ); + + while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) { + colon = last_char_is(tokens[0], ':'); + if (colon == NULL) + continue; + *colon = '\0'; + filename2modname(tokens[0], name); + for (i = 0; argv[i]; i++) { + if (fnmatch(argv[i], name, 0) == 0) { + modinfo(tokens[0], &env); + argv[i] = (char *) ""; + } + } + } + for (i = 0; argv[i]; i++) { + if (argv[i][0]) { + modinfo(argv[i], &env); + } + } + return 0; +} |