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authorPascal Bellard <pascal.bellard@ads-lu.com>2010-06-06 02:55:13 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2010-06-06 02:55:13 (GMT)
commit22bdf90334515e047fcccf36ae80a543b6a056de (patch)
tree96e10780f25e2ba2d10df3d17418fe9100deb521
parent2f32bf8be63f70125049402ba43101d8c6083d46 (diff)
downloadbusybox-22bdf90334515e047fcccf36ae80a543b6a056de.tar.gz
busybox-22bdf90334515e047fcccf36ae80a543b6a056de.tar.bz2
modinfo: new applet
function old new delta modinfo_main - 307 +307 modinfo - 280 +280 packed_usage 27037 27131 +94 display - 74 +74 static.shortcuts - 24 +24 applet_names 2254 2262 +8 applet_main 1324 1328 +4 applet_nameofs 662 664 +2 ------------------------------------------------------------------------------ (add/remove: 5/0 grow/shrink: 4/0 up/down: 793/0) Total: 793 bytes Signed-off-by: Pascal Bellard <pascal.bellard@ads-lu.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--modutils/Config.src2
-rw-r--r--modutils/Kbuild.src1
-rw-r--r--modutils/modinfo.c150
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;
+}