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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
326bb68c LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2014 Lennart Poettering | |
326bb68c LP |
6 | ***/ |
7 | ||
b5efdb8a | 8 | #include "alloc-util.h" |
326bb68c | 9 | #include "mkdir.h" |
6bedfcbb | 10 | #include "parse-util.h" |
4e731273 | 11 | #include "proc-cmdline.h" |
7dcc5671 | 12 | #include "special.h" |
4e731273 LP |
13 | #include "string-util.h" |
14 | #include "strv.h" | |
15 | #include "unit-name.h" | |
16 | #include "util.h" | |
326bb68c | 17 | |
7dcc5671 | 18 | static char *arg_default_unit = NULL; |
326bb68c LP |
19 | static const char *arg_dest = "/tmp"; |
20 | static char **arg_mask = NULL; | |
3c5a87a8 | 21 | static char **arg_wants = NULL; |
326bb68c LP |
22 | static bool arg_debug_shell = false; |
23 | ||
96287a49 | 24 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
326bb68c LP |
25 | int r; |
26 | ||
3c5a87a8 LP |
27 | assert(key); |
28 | ||
326bb68c | 29 | if (streq(key, "systemd.mask")) { |
1d84ad94 | 30 | char *n; |
326bb68c | 31 | |
1d84ad94 LP |
32 | if (proc_cmdline_value_missing(key, value)) |
33 | return 0; | |
326bb68c | 34 | |
37cbc1d5 | 35 | r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); |
1d84ad94 LP |
36 | if (r < 0) |
37 | return log_error_errno(r, "Failed to glob unit name: %m"); | |
326bb68c | 38 | |
1d84ad94 LP |
39 | r = strv_consume(&arg_mask, n); |
40 | if (r < 0) | |
41 | return log_oom(); | |
3c5a87a8 LP |
42 | |
43 | } else if (streq(key, "systemd.wants")) { | |
1d84ad94 | 44 | char *n; |
3c5a87a8 | 45 | |
1d84ad94 LP |
46 | if (proc_cmdline_value_missing(key, value)) |
47 | return 0; | |
3c5a87a8 | 48 | |
37cbc1d5 | 49 | r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); |
1d84ad94 LP |
50 | if (r < 0) |
51 | return log_error_errno(r, "Failed to glob unit name: %m"); | |
3c5a87a8 | 52 | |
1d84ad94 LP |
53 | r = strv_consume(&arg_wants, n); |
54 | if (r < 0) | |
55 | return log_oom(); | |
3c5a87a8 | 56 | |
1d84ad94 | 57 | } else if (proc_cmdline_key_streq(key, "systemd.debug_shell")) { |
326bb68c LP |
58 | |
59 | if (value) { | |
60 | r = parse_boolean(value); | |
61 | if (r < 0) | |
1d84ad94 | 62 | log_error("Failed to parse systemd.debug_shell= argument '%s', ignoring.", value); |
326bb68c LP |
63 | else |
64 | arg_debug_shell = r; | |
65 | } else | |
66 | arg_debug_shell = true; | |
1d84ad94 | 67 | |
7dcc5671 EV |
68 | } else if (streq(key, "systemd.unit")) { |
69 | ||
1d84ad94 LP |
70 | if (proc_cmdline_value_missing(key, value)) |
71 | return 0; | |
72 | ||
73 | r = free_and_strdup(&arg_default_unit, value); | |
74 | if (r < 0) | |
75 | return log_error_errno(r, "Failed to set default unit %s: %m", value); | |
76 | ||
7dcc5671 EV |
77 | } else if (!value) { |
78 | const char *target; | |
79 | ||
80 | target = runlevel_to_target(key); | |
81 | if (target) { | |
82 | r = free_and_strdup(&arg_default_unit, target); | |
83 | if (r < 0) | |
84 | return log_error_errno(r, "Failed to set default unit %s: %m", target); | |
85 | } | |
326bb68c LP |
86 | } |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static int generate_mask_symlinks(void) { | |
92 | char **u; | |
93 | int r = 0; | |
94 | ||
95 | if (strv_isempty(arg_mask)) | |
96 | return 0; | |
97 | ||
98 | STRV_FOREACH(u, arg_mask) { | |
3c5a87a8 | 99 | _cleanup_free_ char *p = NULL; |
326bb68c | 100 | |
605405c6 | 101 | p = strjoin(arg_dest, "/", *u); |
326bb68c LP |
102 | if (!p) |
103 | return log_oom(); | |
104 | ||
1f6b4113 | 105 | if (symlink("/dev/null", p) < 0) |
94c156cd LP |
106 | r = log_error_errno(errno, |
107 | "Failed to create mask symlink %s: %m", | |
108 | p); | |
326bb68c LP |
109 | } |
110 | ||
111 | return r; | |
112 | } | |
113 | ||
3c5a87a8 LP |
114 | static int generate_wants_symlinks(void) { |
115 | char **u; | |
116 | int r = 0; | |
326bb68c | 117 | |
3c5a87a8 | 118 | if (strv_isempty(arg_wants)) |
326bb68c LP |
119 | return 0; |
120 | ||
3c5a87a8 LP |
121 | STRV_FOREACH(u, arg_wants) { |
122 | _cleanup_free_ char *p = NULL, *f = NULL; | |
3a8a0ace | 123 | const char *target = arg_default_unit ?: SPECIAL_DEFAULT_TARGET; |
3c5a87a8 | 124 | |
3a8a0ace | 125 | p = strjoin(arg_dest, "/", target, ".wants/", *u); |
3c5a87a8 LP |
126 | if (!p) |
127 | return log_oom(); | |
128 | ||
129 | f = strappend(SYSTEM_DATA_UNIT_PATH "/", *u); | |
130 | if (!f) | |
131 | return log_oom(); | |
326bb68c | 132 | |
3c5a87a8 | 133 | mkdir_parents_label(p, 0755); |
326bb68c | 134 | |
1f6b4113 | 135 | if (symlink(f, p) < 0) |
94c156cd LP |
136 | r = log_error_errno(errno, |
137 | "Failed to create wants symlink %s: %m", | |
138 | p); | |
326bb68c LP |
139 | } |
140 | ||
3c5a87a8 | 141 | return r; |
326bb68c LP |
142 | } |
143 | ||
144 | int main(int argc, char *argv[]) { | |
145 | int r, q; | |
146 | ||
147 | if (argc > 1 && argc != 4) { | |
148 | log_error("This program takes three or no arguments."); | |
149 | return EXIT_FAILURE; | |
150 | } | |
151 | ||
152 | if (argc > 1) | |
153 | arg_dest = argv[2]; | |
154 | ||
6c347d50 LP |
155 | log_set_prohibit_ipc(true); |
156 | log_set_target(LOG_TARGET_AUTO); | |
326bb68c LP |
157 | log_parse_environment(); |
158 | log_open(); | |
159 | ||
160 | umask(0022); | |
161 | ||
1d84ad94 | 162 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 163 | if (r < 0) |
da927ba9 | 164 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
326bb68c | 165 | |
3c5a87a8 LP |
166 | if (arg_debug_shell) { |
167 | r = strv_extend(&arg_wants, "debug-shell.service"); | |
168 | if (r < 0) { | |
169 | r = log_oom(); | |
170 | goto finish; | |
171 | } | |
172 | } | |
173 | ||
326bb68c LP |
174 | r = generate_mask_symlinks(); |
175 | ||
3c5a87a8 | 176 | q = generate_wants_symlinks(); |
326bb68c LP |
177 | if (q < 0) |
178 | r = q; | |
179 | ||
3c5a87a8 | 180 | finish: |
3a8a0ace | 181 | arg_default_unit = mfree(arg_default_unit); |
326bb68c | 182 | |
3a8a0ace | 183 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
326bb68c | 184 | } |