* Mini lsmod implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
*
- * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
- * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels
- * (which lack the query_module() interface).
- *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
-#include "busybox.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stddef.h>
-#include <errno.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <ctype.h>
-#include <assert.h>
-#include <getopt.h>
-#include <sys/utsname.h>
-#include <sys/file.h>
-
-
-#ifndef CONFIG_FEATURE_CHECK_TAINTED_MODULE
-static inline void check_tainted(void) { printf("\n"); }
-#else
-#define TAINT_FILENAME "/proc/sys/kernel/tainted"
-#define TAINT_PROPRIETORY_MODULE (1<<0)
-#define TAINT_FORCED_MODULE (1<<1)
-#define TAINT_UNSAFE_SMP (1<<2)
+//config:config LSMOD
+//config: bool "lsmod (1.9 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: lsmod is used to display a list of loaded modules.
+//config:
+//config:config FEATURE_LSMOD_PRETTY_2_6_OUTPUT
+//config: bool "Pretty output"
+//config: default y
+//config: depends on LSMOD && !MODPROBE_SMALL
+//config: help
+//config: This option makes output format of lsmod adjusted to
+//config: the format of module-init-tools for Linux kernel 2.6.
+//config: Increases size somewhat.
+
+//applet:IF_LSMOD(IF_NOT_MODPROBE_SMALL(APPLET_NOEXEC(lsmod, lsmod, BB_DIR_SBIN, BB_SUID_DROP, lsmod)))
+
+//kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y)
+//kbuild:lib-$(CONFIG_LSMOD) += lsmod.o modutils.o
+//kbuild:endif
+
+//usage:#if !ENABLE_MODPROBE_SMALL
+//usage:#define lsmod_trivial_usage
+//usage: ""
+//usage:#define lsmod_full_usage "\n\n"
+//usage: "List loaded kernel modules"
+//usage:#endif
+
+#include "libbb.h"
+#include "unicode.h"
+
+#if ENABLE_FEATURE_CHECK_TAINTED_MODULE
+enum {
+ TAINT_PROPRIETORY_MODULE = (1 << 0),
+ TAINT_FORCED_MODULE = (1 << 1),
+ TAINT_UNSAFE_SMP = (1 << 2),
+};
static void check_tainted(void)
{
- int tainted;
- FILE *f;
-
- tainted = 0;
- if ((f = fopen(TAINT_FILENAME, "r"))) {
- fscanf(f, "%d", &tainted);
- fclose(f);
+ int tainted = 0;
+ char *buf = xmalloc_open_read_close("/proc/sys/kernel/tainted", NULL);
+ if (buf) {
+ tainted = atoi(buf);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(buf);
}
- if (f && tainted) {
+
+ if (tainted) {
printf(" Tainted: %c%c%c\n",
tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
- }
- else {
- printf(" Not tainted\n");
+ } else {
+ puts(" Not tainted");
}
}
-#endif
-
-#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
-
-struct module_info
+#else
+static ALWAYS_INLINE void check_tainted(void)
{
- unsigned long addr;
- unsigned long size;
- unsigned long flags;
- long usecount;
-};
-
-
-int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
-
-enum {
-/* Values for query_module's which. */
- QM_MODULES = 1,
- QM_DEPS = 2,
- QM_REFS = 3,
- QM_SYMBOLS = 4,
- QM_INFO = 5,
-
-/* Bits of module.flags. */
- NEW_MOD_RUNNING = 1,
- NEW_MOD_DELETED = 2,
- NEW_MOD_AUTOCLEAN = 4,
- NEW_MOD_VISITED = 8,
- NEW_MOD_USED_ONCE = 16,
- NEW_MOD_INITIALIZING = 64
-};
+ putchar('\n');
+}
+#endif
-int lsmod_main(int argc, char **argv)
+int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
- struct module_info info;
- char *module_names, *mn, *deps, *dn;
- size_t bufsize, depsize, nmod, count, i, j;
-
- module_names = xmalloc(bufsize = 256);
- if (my_query_module(NULL, QM_MODULES, (void **)&module_names, &bufsize,
- &nmod)) {
- bb_perror_msg_and_die("QM_MODULES");
- }
+#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
+ char *token[4];
+ parser_t *parser = config_open("/proc/modules");
+ init_unicode();
- deps = xmalloc(depsize = 256);
- printf("Module Size Used by");
+ printf("%-24sSize Used by", "Module");
check_tainted();
- for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
- if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
- if (errno == ENOENT) {
- /* The module was removed out from underneath us. */
- continue;
+ if (ENABLE_FEATURE_2_4_MODULES
+ && get_linux_version_code() < KERNEL_VERSION(2,6,0)
+ ) {
+ while (config_read(parser, token, 4, 3, "# \t", PARSE_NORMAL)) {
+ if (token[3] != NULL && token[3][0] == '[') {
+ token[3]++;
+ token[3][strlen(token[3])-1] = '\0';
+ } else
+ token[3] = (char *) "";
+# if ENABLE_UNICODE_SUPPORT
+ {
+ uni_stat_t uni_stat;
+ char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]);
+ unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width;
+ printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]);
+ free(uni_name);
}
- /* else choke */
- bb_perror_msg_and_die("module %s: QM_INFO", mn);
+# else
+ printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
+# endif
}
- if (my_query_module(mn, QM_REFS, (void **)&deps, &depsize, &count)) {
- if (errno == ENOENT) {
- /* The module was removed out from underneath us. */
- continue;
+ } else {
+ while (config_read(parser, token, 4, 4, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
+ // N.B. token[3] is either '-' (module is not used by others)
+ // or comma-separated list ended by comma
+ // so trimming the trailing char is just what we need!
+ if (token[3][0])
+ token[3][strlen(token[3]) - 1] = '\0';
+# if ENABLE_UNICODE_SUPPORT
+ {
+ uni_stat_t uni_stat;
+ char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]);
+ unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width;
+ printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]);
+ free(uni_name);
}
- bb_perror_msg_and_die("module %s: QM_REFS", mn);
+# else
+ printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
+# endif
}
- printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
- if (info.flags & NEW_MOD_DELETED)
- printf(" (deleted)");
- else if (info.flags & NEW_MOD_INITIALIZING)
- printf(" (initializing)");
- else if (!(info.flags & NEW_MOD_RUNNING))
- printf(" (uninitialized)");
- else {
- if (info.flags & NEW_MOD_AUTOCLEAN)
- printf(" (autoclean) ");
- if (!(info.flags & NEW_MOD_USED_ONCE))
- printf(" (unused)");
- }
- if (count) printf(" [");
- for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
- printf("%s%s", dn, (j==count-1)? "":" ");
- }
- if (count) printf("]");
-
- printf("\n");
}
-
-#ifdef CONFIG_FEATURE_CLEAN_UP
- free(module_names);
-#endif
-
- return( 0);
-}
-
-#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
-
-int lsmod_main(int argc, char **argv)
-{
- printf("Module Size Used by");
+ if (ENABLE_FEATURE_CLEAN_UP)
+ config_close(parser);
+#else
check_tainted();
-#if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT)
- {
- FILE *file;
- char line[4096];
-
- file = bb_xfopen("/proc/modules", "r");
-
- while (fgets(line, sizeof(line), file)) {
- char *tok;
-
- tok = strtok(line, " \t");
- printf("%-19s", tok);
- tok = strtok(NULL, " \t\n");
- printf(" %8s", tok);
- tok = strtok(NULL, " \t\n");
- /* Null if no module unloading support. */
- if (tok) {
- printf(" %s", tok);
- tok = strtok(NULL, "\n");
- if (!tok)
- tok = "";
- /* New-style has commas, or -. If so,
- truncate (other fields might follow). */
- else if (strchr(tok, ',')) {
- tok = strtok(tok, "\t ");
- /* Strip trailing comma. */
- if (tok[strlen(tok)-1] == ',')
- tok[strlen(tok)-1] = '\0';
- } else if (tok[0] == '-'
- && (tok[1] == '\0' || isspace(tok[1])))
- tok = "";
- printf(" %s", tok);
- }
- printf("\n");
- }
- fclose(file);
- }
+ xprint_and_close_file(xfopen_for_read("/proc/modules"));
+#endif
return EXIT_SUCCESS;
-#else
- if (bb_xprint_file_by_name("/proc/modules") == 0)
- return EXIT_SUCCESS;
-#endif /* CONFIG_FEATURE_2_6_MODULES */
-
- return EXIT_FAILURE;
}
-
-#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
projects / oweals / busybox.git / blobdiff