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/* vi: set sw=4 ts=4: */
/*
* Mini lsmod implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* 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.
*/
#include "libbb.h"
#if !ENABLE_FEATURE_CHECK_TAINTED_MODULE
static void check_tainted(void) { bb_putchar('\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)
static void check_tainted(void)
{
int tainted;
FILE *f;
tainted = 0;
f = fopen_for_read(TAINT_FILENAME);
if (f) {
fscanf(f, "%d", &tainted);
fclose(f);
}
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");
}
}
#endif
#if ENABLE_FEATURE_QUERY_MODULE_INTERFACE
struct module_info
{
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
};
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 = deps = NULL;
bufsize = depsize = 0;
while (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) {
if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES");
module_names = xmalloc(bufsize = nmod);
}
deps = xmalloc(depsize = 256);
printf("Module\t\t\tSize Used by");
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;
}
/* else choke */
bb_perror_msg_and_die("module %s: QM_INFO", mn);
}
while (query_module(mn, QM_REFS, deps, depsize, &count)) {
if (errno == ENOENT) {
/* The module was removed out from underneath us. */
continue;
} else if (errno != ENOSPC)
bb_perror_msg_and_die("module %s: QM_REFS", mn);
deps = xrealloc(deps, count);
}
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)
bb_putchar(']');
bb_putchar('\n');
}
#if ENABLE_FEATURE_CLEAN_UP
free(module_names);
#endif
return 0;
}
#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
FILE *file = xfopen_for_read("/proc/modules");
printf("Module Size Used by");
check_tainted();
#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
{
char *line;
while ((line = xmalloc_fgets(file)) != NULL) {
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 = (char*)"";
/* 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 = (char*)"";
}
printf(" %s", tok);
}
bb_putchar('\n');
free(line);
}
fclose(file);
}
#else
xprint_and_close_file(file);
#endif /* CONFIG_FEATURE_2_6_MODULES */
return EXIT_SUCCESS;
}
#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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