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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | ||
3 | #include <errno.h> | |
4 | #include <getopt.h> | |
5 | #include <libkmod.h> | |
6 | #include <limits.h> | |
7 | #include <string.h> | |
8 | #include <sys/stat.h> | |
9 | ||
10 | #include "conf-files.h" | |
11 | #include "def.h" | |
12 | #include "fd-util.h" | |
13 | #include "fileio.h" | |
14 | #include "log.h" | |
15 | #include "module-util.h" | |
16 | #include "proc-cmdline.h" | |
17 | #include "string-util.h" | |
18 | #include "strv.h" | |
19 | #include "terminal-util.h" | |
20 | #include "util.h" | |
21 | ||
22 | static char **arg_proc_cmdline_modules = NULL; | |
23 | ||
24 | static const char conf_file_dirs[] = CONF_PATHS_NULSTR("modules-load.d"); | |
25 | ||
26 | static void systemd_kmod_log(void *data, int priority, const char *file, int line, | |
27 | const char *fn, const char *format, va_list args) { | |
28 | ||
29 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
30 | log_internalv(priority, 0, file, line, fn, format, args); | |
31 | REENABLE_WARNING; | |
32 | } | |
33 | ||
34 | static int add_modules(const char *p) { | |
35 | _cleanup_strv_free_ char **k = NULL; | |
36 | ||
37 | k = strv_split(p, ","); | |
38 | if (!k) | |
39 | return log_oom(); | |
40 | ||
41 | if (strv_extend_strv(&arg_proc_cmdline_modules, k, true) < 0) | |
42 | return log_oom(); | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { | |
48 | int r; | |
49 | ||
50 | if (proc_cmdline_key_streq(key, "modules_load")) { | |
51 | ||
52 | if (proc_cmdline_value_missing(key, value)) | |
53 | return 0; | |
54 | ||
55 | r = add_modules(value); | |
56 | if (r < 0) | |
57 | return r; | |
58 | } | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) { | |
64 | _cleanup_fclose_ FILE *f = NULL; | |
65 | int r; | |
66 | ||
67 | assert(ctx); | |
68 | assert(path); | |
69 | ||
70 | r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f); | |
71 | if (r < 0) { | |
72 | if (ignore_enoent && r == -ENOENT) | |
73 | return 0; | |
74 | ||
75 | return log_error_errno(r, "Failed to open %s, ignoring: %m", path); | |
76 | } | |
77 | ||
78 | log_debug("apply: %s", path); | |
79 | for (;;) { | |
80 | char line[LINE_MAX], *l; | |
81 | int k; | |
82 | ||
83 | if (!fgets(line, sizeof(line), f)) { | |
84 | if (feof(f)) | |
85 | break; | |
86 | ||
87 | return log_error_errno(errno, "Failed to read file '%s', ignoring: %m", path); | |
88 | } | |
89 | ||
90 | l = strstrip(line); | |
91 | if (!*l) | |
92 | continue; | |
93 | if (strchr(COMMENTS "\n", *l)) | |
94 | continue; | |
95 | ||
96 | k = module_load_and_warn(ctx, l, true); | |
97 | if (k < 0 && r == 0) | |
98 | r = k; | |
99 | } | |
100 | ||
101 | return r; | |
102 | } | |
103 | ||
104 | static int help(void) { | |
105 | _cleanup_free_ char *link = NULL; | |
106 | int r; | |
107 | ||
108 | r = terminal_urlify_man("systemd-modules-load.service", "8", &link); | |
109 | if (r < 0) | |
110 | return log_oom(); | |
111 | ||
112 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" | |
113 | "Loads statically configured kernel modules.\n\n" | |
114 | " -h --help Show this help\n" | |
115 | " --version Show package version\n" | |
116 | "\nSee the %s for details.\n" | |
117 | , program_invocation_short_name | |
118 | , link | |
119 | ); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static int parse_argv(int argc, char *argv[]) { | |
125 | ||
126 | enum { | |
127 | ARG_VERSION = 0x100, | |
128 | }; | |
129 | ||
130 | static const struct option options[] = { | |
131 | { "help", no_argument, NULL, 'h' }, | |
132 | { "version", no_argument, NULL, ARG_VERSION }, | |
133 | {} | |
134 | }; | |
135 | ||
136 | int c; | |
137 | ||
138 | assert(argc >= 0); | |
139 | assert(argv); | |
140 | ||
141 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
142 | ||
143 | switch (c) { | |
144 | ||
145 | case 'h': | |
146 | return help(); | |
147 | ||
148 | case ARG_VERSION: | |
149 | return version(); | |
150 | ||
151 | case '?': | |
152 | return -EINVAL; | |
153 | ||
154 | default: | |
155 | assert_not_reached("Unhandled option"); | |
156 | } | |
157 | ||
158 | return 1; | |
159 | } | |
160 | ||
161 | int main(int argc, char *argv[]) { | |
162 | int r, k; | |
163 | _cleanup_(kmod_unrefp) struct kmod_ctx *ctx = NULL; | |
164 | ||
165 | r = parse_argv(argc, argv); | |
166 | if (r <= 0) | |
167 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
168 | ||
169 | log_set_target(LOG_TARGET_AUTO); | |
170 | log_parse_environment(); | |
171 | log_open(); | |
172 | ||
173 | umask(0022); | |
174 | ||
175 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); | |
176 | if (r < 0) | |
177 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); | |
178 | ||
179 | ctx = kmod_new(NULL, NULL); | |
180 | if (!ctx) { | |
181 | log_error("Failed to allocate memory for kmod."); | |
182 | goto finish; | |
183 | } | |
184 | ||
185 | kmod_load_resources(ctx); | |
186 | kmod_set_log_fn(ctx, systemd_kmod_log, NULL); | |
187 | ||
188 | r = 0; | |
189 | ||
190 | if (argc > optind) { | |
191 | int i; | |
192 | ||
193 | for (i = optind; i < argc; i++) { | |
194 | k = apply_file(ctx, argv[i], false); | |
195 | if (k < 0 && r == 0) | |
196 | r = k; | |
197 | } | |
198 | ||
199 | } else { | |
200 | _cleanup_strv_free_ char **files = NULL; | |
201 | char **fn, **i; | |
202 | ||
203 | STRV_FOREACH(i, arg_proc_cmdline_modules) { | |
204 | k = module_load_and_warn(ctx, *i, true); | |
205 | if (k < 0 && r == 0) | |
206 | r = k; | |
207 | } | |
208 | ||
209 | k = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs); | |
210 | if (k < 0) { | |
211 | log_error_errno(k, "Failed to enumerate modules-load.d files: %m"); | |
212 | if (r == 0) | |
213 | r = k; | |
214 | goto finish; | |
215 | } | |
216 | ||
217 | STRV_FOREACH(fn, files) { | |
218 | k = apply_file(ctx, *fn, true); | |
219 | if (k < 0 && r == 0) | |
220 | r = k; | |
221 | } | |
222 | } | |
223 | ||
224 | finish: | |
225 | strv_free(arg_proc_cmdline_modules); | |
226 | ||
227 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
228 | } |