]>
Commit | Line | Data |
---|---|---|
db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
326bb68c | 2 | |
ca78ad1d ZJS |
3 | #include <unistd.h> |
4 | ||
b5efdb8a | 5 | #include "alloc-util.h" |
93912e87 | 6 | #include "dropin.h" |
afe44c8f | 7 | #include "generator.h" |
326bb68c | 8 | #include "mkdir.h" |
6bedfcbb | 9 | #include "parse-util.h" |
657ee2d8 | 10 | #include "path-util.h" |
4e731273 | 11 | #include "proc-cmdline.h" |
7dcc5671 | 12 | #include "special.h" |
4e731273 LP |
13 | #include "string-util.h" |
14 | #include "strv.h" | |
da33cba0 | 15 | #include "unit-file.h" |
4e731273 | 16 | #include "unit-name.h" |
326bb68c | 17 | |
7a44c7e3 | 18 | static const char *arg_dest = NULL; |
7dcc5671 | 19 | static char *arg_default_unit = NULL; |
326bb68c | 20 | static char **arg_mask = NULL; |
3c5a87a8 | 21 | static char **arg_wants = NULL; |
93912e87 | 22 | static char *arg_debug_shell = NULL; |
326bb68c | 23 | |
4197fde5 LP |
24 | STATIC_DESTRUCTOR_REGISTER(arg_default_unit, freep); |
25 | STATIC_DESTRUCTOR_REGISTER(arg_mask, strv_freep); | |
26 | STATIC_DESTRUCTOR_REGISTER(arg_wants, strv_freep); | |
93912e87 | 27 | STATIC_DESTRUCTOR_REGISTER(arg_debug_shell, freep); |
4197fde5 | 28 | |
96287a49 | 29 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
326bb68c LP |
30 | int r; |
31 | ||
3c5a87a8 LP |
32 | assert(key); |
33 | ||
326bb68c | 34 | if (streq(key, "systemd.mask")) { |
1d84ad94 | 35 | char *n; |
326bb68c | 36 | |
1d84ad94 LP |
37 | if (proc_cmdline_value_missing(key, value)) |
38 | return 0; | |
326bb68c | 39 | |
37cbc1d5 | 40 | r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); |
1d84ad94 LP |
41 | if (r < 0) |
42 | return log_error_errno(r, "Failed to glob unit name: %m"); | |
326bb68c | 43 | |
1d84ad94 LP |
44 | r = strv_consume(&arg_mask, n); |
45 | if (r < 0) | |
46 | return log_oom(); | |
3c5a87a8 LP |
47 | |
48 | } else if (streq(key, "systemd.wants")) { | |
1d84ad94 | 49 | char *n; |
3c5a87a8 | 50 | |
1d84ad94 LP |
51 | if (proc_cmdline_value_missing(key, value)) |
52 | return 0; | |
3c5a87a8 | 53 | |
37cbc1d5 | 54 | r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); |
1d84ad94 LP |
55 | if (r < 0) |
56 | return log_error_errno(r, "Failed to glob unit name: %m"); | |
3c5a87a8 | 57 | |
1d84ad94 LP |
58 | r = strv_consume(&arg_wants, n); |
59 | if (r < 0) | |
60 | return log_oom(); | |
3c5a87a8 | 61 | |
1d84ad94 | 62 | } else if (proc_cmdline_key_streq(key, "systemd.debug_shell")) { |
93912e87 | 63 | const char *t = NULL; |
326bb68c | 64 | |
93912e87 JS |
65 | r = value ? parse_boolean(value) : 1; |
66 | if (r < 0) | |
67 | t = skip_dev_prefix(value); | |
68 | else if (r > 0) | |
69 | t = skip_dev_prefix(DEBUGTTY); | |
70 | ||
71 | if (free_and_strdup(&arg_debug_shell, t) < 0) | |
72 | return log_oom(); | |
1d84ad94 | 73 | |
7dcc5671 EV |
74 | } else if (streq(key, "systemd.unit")) { |
75 | ||
1d84ad94 LP |
76 | if (proc_cmdline_value_missing(key, value)) |
77 | return 0; | |
78 | ||
79 | r = free_and_strdup(&arg_default_unit, value); | |
80 | if (r < 0) | |
81 | return log_error_errno(r, "Failed to set default unit %s: %m", value); | |
82 | ||
7dcc5671 EV |
83 | } else if (!value) { |
84 | const char *target; | |
85 | ||
86 | target = runlevel_to_target(key); | |
87 | if (target) { | |
88 | r = free_and_strdup(&arg_default_unit, target); | |
89 | if (r < 0) | |
90 | return log_error_errno(r, "Failed to set default unit %s: %m", target); | |
91 | } | |
326bb68c LP |
92 | } |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | static int generate_mask_symlinks(void) { | |
98 | char **u; | |
99 | int r = 0; | |
100 | ||
101 | if (strv_isempty(arg_mask)) | |
102 | return 0; | |
103 | ||
104 | STRV_FOREACH(u, arg_mask) { | |
3c5a87a8 | 105 | _cleanup_free_ char *p = NULL; |
326bb68c | 106 | |
657ee2d8 | 107 | p = path_join(empty_to_root(arg_dest), *u); |
326bb68c LP |
108 | if (!p) |
109 | return log_oom(); | |
110 | ||
1f6b4113 | 111 | if (symlink("/dev/null", p) < 0) |
94c156cd LP |
112 | r = log_error_errno(errno, |
113 | "Failed to create mask symlink %s: %m", | |
114 | p); | |
326bb68c LP |
115 | } |
116 | ||
117 | return r; | |
118 | } | |
119 | ||
3c5a87a8 LP |
120 | static int generate_wants_symlinks(void) { |
121 | char **u; | |
122 | int r = 0; | |
326bb68c | 123 | |
3c5a87a8 | 124 | if (strv_isempty(arg_wants)) |
326bb68c LP |
125 | return 0; |
126 | ||
3c5a87a8 LP |
127 | STRV_FOREACH(u, arg_wants) { |
128 | _cleanup_free_ char *p = NULL, *f = NULL; | |
23e5e79a ZJS |
129 | const char *target; |
130 | ||
131 | /* This should match what do_queue_default_job() in core/main.c does. */ | |
132 | if (arg_default_unit) | |
133 | target = arg_default_unit; | |
134 | else if (in_initrd()) | |
135 | target = SPECIAL_INITRD_TARGET; | |
136 | else | |
137 | target = SPECIAL_DEFAULT_TARGET; | |
3c5a87a8 | 138 | |
3a8a0ace | 139 | p = strjoin(arg_dest, "/", target, ".wants/", *u); |
3c5a87a8 LP |
140 | if (!p) |
141 | return log_oom(); | |
142 | ||
b910cc72 | 143 | f = path_join(SYSTEM_DATA_UNIT_PATH, *u); |
3c5a87a8 LP |
144 | if (!f) |
145 | return log_oom(); | |
326bb68c | 146 | |
3c5a87a8 | 147 | mkdir_parents_label(p, 0755); |
326bb68c | 148 | |
1f6b4113 | 149 | if (symlink(f, p) < 0) |
94c156cd LP |
150 | r = log_error_errno(errno, |
151 | "Failed to create wants symlink %s: %m", | |
152 | p); | |
326bb68c LP |
153 | } |
154 | ||
3c5a87a8 | 155 | return r; |
326bb68c LP |
156 | } |
157 | ||
93912e87 JS |
158 | static void install_debug_shell_dropin(const char *dir) { |
159 | int r; | |
160 | ||
161 | if (streq(arg_debug_shell, skip_dev_prefix(DEBUGTTY))) | |
162 | return; | |
163 | ||
164 | r = write_drop_in_format(dir, "debug-shell.service", 50, "tty", | |
165 | "[Unit]\n" | |
166 | "Description=Early root shell on /dev/%s FOR DEBUGGING ONLY\n" | |
167 | "ConditionPathExists=\n" | |
168 | "[Service]\n" | |
169 | "TTYPath=/dev/%s", | |
170 | arg_debug_shell, arg_debug_shell); | |
171 | if (r < 0) | |
172 | log_warning_errno(r, "Failed to write drop-in for debug-shell.service, ignoring: %m"); | |
173 | } | |
174 | ||
7a44c7e3 | 175 | static int run(const char *dest, const char *dest_early, const char *dest_late) { |
326bb68c LP |
176 | int r, q; |
177 | ||
7a44c7e3 | 178 | assert_se(arg_dest = dest_early); |
326bb68c | 179 | |
a7dd6d04 | 180 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_RD_STRICT | PROC_CMDLINE_STRIP_RD_PREFIX); |
b5884878 | 181 | if (r < 0) |
da927ba9 | 182 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
326bb68c | 183 | |
3c5a87a8 LP |
184 | if (arg_debug_shell) { |
185 | r = strv_extend(&arg_wants, "debug-shell.service"); | |
4197fde5 LP |
186 | if (r < 0) |
187 | return log_oom(); | |
93912e87 JS |
188 | |
189 | install_debug_shell_dropin(arg_dest); | |
3c5a87a8 LP |
190 | } |
191 | ||
326bb68c | 192 | r = generate_mask_symlinks(); |
3c5a87a8 | 193 | q = generate_wants_symlinks(); |
326bb68c | 194 | |
4197fde5 | 195 | return r < 0 ? r : q; |
326bb68c | 196 | } |
f60947d9 | 197 | |
7a44c7e3 | 198 | DEFINE_MAIN_GENERATOR_FUNCTION(run); |