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https://github.com/sheumann/hush.git
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modinfo: fix "-F firmware", add "intree" field display
function old new delta shortcuts - 52 +52 modinfo 317 330 +13 display 77 87 +10 packed_usage 30752 30761 +9 modinfo_main 351 345 -6 static.shortcuts 48 - -48 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 3/1 up/down: 84/-54) Total: 30 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
4840325351
commit
4c8576fea1
@ -5,11 +5,6 @@
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//applet:IF_MODINFO(APPLET(modinfo, BB_DIR_SBIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_MODINFO) += modinfo.o modutils.o
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//config:config MODINFO
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//config: bool "modinfo"
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//config: default y
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@ -17,26 +12,46 @@
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//config: help
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//config: Show information about a Linux Kernel module
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//applet:IF_MODINFO(APPLET(modinfo, BB_DIR_SBIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_MODINFO) += modinfo.o modutils.o
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#include <fnmatch.h>
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#include <sys/utsname.h> /* uname() */
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#include "libbb.h"
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#include "modutils.h"
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static const char *const shortcuts[] = {
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"filename", // -n
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"author", // -a
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"description", // -d
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"license", // -l
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"parm", // -p
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"version", // the rest has no shortcut options
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"alias",
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"srcversion",
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"depends",
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"uts_release",
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"intree",
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"vermagic",
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"firmware",
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};
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enum {
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OPT_TAGS = (1 << 12) - 1, /* shortcut count */
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OPT_F = (1 << 12), /* field name */
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OPT_0 = (1 << 13), /* \0 as separator */
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OPT_0 = (1 << 0), /* \0 as separator */
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OPT_F = (1 << 1), /* field name */
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/* first bits are for -nadlp options, the rest are for
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* fields not selectable with "shortcut" options
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*/
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OPT_n = (1 << 2),
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OPT_TAGS = ((1 << ARRAY_SIZE(shortcuts)) - 1) << 2,
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};
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struct modinfo_env {
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char *field;
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int tags;
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};
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static void display(const char *data, const char *pattern, int flag)
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static void display(const char *data, const char *pattern)
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{
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if (flag) {
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int flag = option_mask32 >> 1; /* shift out -0 bit */
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if (flag & (flag-1)) {
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/* more than one field to show: print "FIELD:" pfx */
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int n = printf("%s:", pattern);
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while (n++ < 16)
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bb_putchar(' ');
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@ -45,55 +60,45 @@ static void display(const char *data, const char *pattern, int flag)
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}
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static void modinfo(const char *path, const char *version,
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const struct modinfo_env *env)
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const char *field)
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{
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static const char *const shortcuts[] = {
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"filename",
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"license",
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"author",
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"description",
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"version",
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"alias",
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"srcversion",
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"depends",
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"uts_release",
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"vermagic",
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"parm",
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"firmware",
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};
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size_t len;
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int j;
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char *ptr, *the_module;
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const char *field = env->field;
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int tags = env->tags;
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if (tags & 1) { /* filename */
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display(path, shortcuts[0], 1 != tags);
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}
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char *allocated;
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int tags = option_mask32;
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allocated = NULL;
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len = MAXINT(ssize_t);
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the_module = xmalloc_open_zipped_read_close(path, &len);
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if (!the_module) {
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if (path[0] == '/')
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return;
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/* Newer depmod puts relative paths in modules.dep */
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path = xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR, version, path);
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path = allocated = xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR, version, path);
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the_module = xmalloc_open_zipped_read_close(path, &len);
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free((char*)path);
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if (!the_module)
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return;
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if (!the_module) {
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bb_error_msg("module '%s' not found", path);
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goto ret;
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}
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}
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if (field)
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tags |= OPT_F;
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for (j = 1; (1<<j) & (OPT_TAGS + OPT_F); j++) {
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for (j = 1; (1<<j) & (OPT_TAGS|OPT_F); j++) {
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const char *pattern;
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if (!((1<<j) & tags))
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continue;
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pattern = field;
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if ((1<<j) & OPT_TAGS)
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pattern = shortcuts[j];
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pattern = shortcuts[j-2];
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if (strcmp(pattern, shortcuts[0]) == 0) {
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/* "-n" or "-F filename" */
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display(path, shortcuts[0]);
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continue;
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}
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ptr = the_module;
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while (1) {
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char *after_pattern;
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@ -106,7 +111,7 @@ static void modinfo(const char *path, const char *version,
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/* field prefixes are 0x80 or 0x00 */
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if ((ptr[-1] & 0x7F) == 0x00) {
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ptr = after_pattern + 1;
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display(ptr, pattern, (1<<j) != tags);
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display(ptr, pattern);
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ptr += strlen(ptr);
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}
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}
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@ -114,15 +119,18 @@ static void modinfo(const char *path, const char *version,
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}
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}
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free(the_module);
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ret:
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free(allocated);
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}
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//usage:#define modinfo_trivial_usage
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//usage: "[-adlp0] [-F keyword] MODULE"
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//usage: "[-adlpn0] [-F keyword] MODULE"
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//usage:#define modinfo_full_usage "\n\n"
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//usage: " -a Shortcut for '-F author'"
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//usage: "\n -d Shortcut for '-F description'"
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//usage: "\n -l Shortcut for '-F license'"
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//usage: "\n -p Shortcut for '-F parm'"
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////usage: "\n -n Shortcut for '-F filename'"
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//usage: "\n -F keyword Keyword to look for"
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//usage: "\n -0 Separate output with NULs"
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//usage:#define modinfo_example_usage
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@ -131,7 +139,7 @@ static void modinfo(const char *path, const char *version,
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int modinfo_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int modinfo_main(int argc UNUSED_PARAM, char **argv)
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{
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struct modinfo_env env;
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const char *field;
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char name[MODULE_NAME_LEN];
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struct utsname uts;
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parser_t *parser;
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@ -139,10 +147,12 @@ int modinfo_main(int argc UNUSED_PARAM, char **argv)
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unsigned opts;
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unsigned i;
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env.field = NULL;
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field = NULL;
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opt_complementary = "-1"; /* minimum one param */
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opts = getopt32(argv, "nladvAsDumpF:0", &env.field);
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env.tags = opts & OPT_TAGS ? opts & OPT_TAGS : OPT_TAGS;
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opts = getopt32(argv, "0F:nadlp", &field);
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/* If no field selected, show all */
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if (!(opts & (OPT_TAGS|OPT_F)))
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option_mask32 |= OPT_TAGS;
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argv += optind;
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uname(&uts);
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@ -159,7 +169,7 @@ int modinfo_main(int argc UNUSED_PARAM, char **argv)
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filename2modname(bb_basename(tokens[0]), name);
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for (i = 0; argv[i]; i++) {
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if (fnmatch(argv[i], name, 0) == 0) {
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modinfo(tokens[0], uts.release, &env);
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modinfo(tokens[0], uts.release, field);
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argv[i] = (char *) "";
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}
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}
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@ -169,7 +179,7 @@ int modinfo_main(int argc UNUSED_PARAM, char **argv)
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for (i = 0; argv[i]; i++) {
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if (argv[i][0]) {
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modinfo(argv[i], uts.release, &env);
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modinfo(argv[i], uts.release, field);
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}
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}
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