busybox/modutils/lsmod.c
Denis Vlasenko ba1315d0fb modutils/*: rewrite by Timo Teras <timo.teras AT iki.fi>
- a lot faster (linear algorithmic complexity, smaller memory foot print)
- a lot smaller (the old code was overly complicated)
- loading of aliases is now module-init-tools compliant
- blacklisting is done correctly (-b option added)
- module argument quoting done right
- depmod now correctly generates modules.symbols and modules.alias

add/remove: 16/21 grow/shrink: 4/6 up/down: 6930/-9316 Total: -2386 bytes
   text    data     bss     dec     hex filename
 806039     592    6680  813311   c68ff busybox_old
 803498     592    6676  810766   c5f0e busybox_unstripped
2008-09-13 14:59:38 +00:00

80 lines
2.2 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Mini lsmod implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.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 = 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 (tainted) {
printf(" Tainted: %c%c%c\n",
tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
} else {
puts(" Not tainted");
}
}
#else
static void check_tainted(void) { putchar('\n'); }
#endif
int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
#if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
char *token[4];
parser_t *parser = config_open("/proc/modules");
printf("Module Size Used by"); //vda!
check_tainted();
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 *) "";
printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
}
} 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!
token[3][strlen(token[3])-1] = '\0';
printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
}
}
if (ENABLE_FEATURE_CLEAN_UP)
config_close(parser);
#else
check_tainted();
xprint_and_close_file(xfopen_for_read("/proc/modules"));
#endif
return EXIT_SUCCESS;
}