1 /*
2 * kmod-lsmod - list modules from linux kernel using libkmod.
3 *
4 * Copyright (C) 2011-2013 ProFUSION embedded systems
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include <errno.h>
21 #include <stddef.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <unistd.h>
26
27 #include <libkmod/libkmod.h>
28
29 #include "kmod.h"
30
do_lsmod(int argc,char * argv[])31 static int do_lsmod(int argc, char *argv[])
32 {
33 struct kmod_ctx *ctx;
34 const char *null_config = NULL;
35 struct kmod_list *list, *itr;
36 int err;
37
38 if (argc != 1) {
39 fprintf(stderr, "Usage: %s\n", argv[0]);
40 return EXIT_FAILURE;
41 }
42
43 ctx = kmod_new(NULL, &null_config);
44 if (ctx == NULL) {
45 fputs("Error: kmod_new() failed!\n", stderr);
46 return EXIT_FAILURE;
47 }
48
49 err = kmod_module_new_from_loaded(ctx, &list);
50 if (err < 0) {
51 fprintf(stderr, "Error: could not get list of modules: %s\n",
52 strerror(-err));
53 kmod_unref(ctx);
54 return EXIT_FAILURE;
55 }
56
57 puts("Module Size Used by");
58
59 kmod_list_foreach(itr, list) {
60 struct kmod_module *mod = kmod_module_get_module(itr);
61 const char *name = kmod_module_get_name(mod);
62 int use_count = kmod_module_get_refcnt(mod);
63 long size = kmod_module_get_size(mod);
64 struct kmod_list *holders, *hitr;
65 int first = 1;
66
67 printf("%-19s %8ld %d", name, size, use_count);
68 holders = kmod_module_get_holders(mod);
69 kmod_list_foreach(hitr, holders) {
70 struct kmod_module *hm = kmod_module_get_module(hitr);
71
72 if (!first) {
73 putchar(',');
74 } else {
75 putchar(' ');
76 first = 0;
77 }
78
79 fputs(kmod_module_get_name(hm), stdout);
80 kmod_module_unref(hm);
81 }
82 putchar('\n');
83 kmod_module_unref_list(holders);
84 kmod_module_unref(mod);
85 }
86 kmod_module_unref_list(list);
87 kmod_unref(ctx);
88
89 return EXIT_SUCCESS;
90 }
91
92 const struct kmod_cmd kmod_cmd_compat_lsmod = {
93 .name = "lsmod",
94 .cmd = do_lsmod,
95 .help = "compat lsmod command",
96 };
97
98 const struct kmod_cmd kmod_cmd_list = {
99 .name = "list",
100 .cmd = do_lsmod,
101 .help = "list currently loaded modules",
102 };
103