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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
326bb68c | 2 | |
ca78ad1d ZJS |
3 | #include <unistd.h> |
4 | ||
b5efdb8a | 5 | #include "alloc-util.h" |
afe44c8f | 6 | #include "generator.h" |
326bb68c | 7 | #include "mkdir.h" |
6bedfcbb | 8 | #include "parse-util.h" |
4e731273 | 9 | #include "proc-cmdline.h" |
7dcc5671 | 10 | #include "special.h" |
4e731273 LP |
11 | #include "string-util.h" |
12 | #include "strv.h" | |
13 | #include "unit-name.h" | |
326bb68c | 14 | |
7a44c7e3 | 15 | static const char *arg_dest = NULL; |
7dcc5671 | 16 | static char *arg_default_unit = NULL; |
326bb68c | 17 | static char **arg_mask = NULL; |
3c5a87a8 | 18 | static char **arg_wants = NULL; |
326bb68c LP |
19 | static bool arg_debug_shell = false; |
20 | ||
4197fde5 LP |
21 | STATIC_DESTRUCTOR_REGISTER(arg_default_unit, freep); |
22 | STATIC_DESTRUCTOR_REGISTER(arg_mask, strv_freep); | |
23 | STATIC_DESTRUCTOR_REGISTER(arg_wants, strv_freep); | |
24 | ||
96287a49 | 25 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
326bb68c LP |
26 | int r; |
27 | ||
3c5a87a8 LP |
28 | assert(key); |
29 | ||
326bb68c | 30 | if (streq(key, "systemd.mask")) { |
1d84ad94 | 31 | char *n; |
326bb68c | 32 | |
1d84ad94 LP |
33 | if (proc_cmdline_value_missing(key, value)) |
34 | return 0; | |
326bb68c | 35 | |
37cbc1d5 | 36 | r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); |
1d84ad94 LP |
37 | if (r < 0) |
38 | return log_error_errno(r, "Failed to glob unit name: %m"); | |
326bb68c | 39 | |
1d84ad94 LP |
40 | r = strv_consume(&arg_mask, n); |
41 | if (r < 0) | |
42 | return log_oom(); | |
3c5a87a8 LP |
43 | |
44 | } else if (streq(key, "systemd.wants")) { | |
1d84ad94 | 45 | char *n; |
3c5a87a8 | 46 | |
1d84ad94 LP |
47 | if (proc_cmdline_value_missing(key, value)) |
48 | return 0; | |
3c5a87a8 | 49 | |
37cbc1d5 | 50 | r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); |
1d84ad94 LP |
51 | if (r < 0) |
52 | return log_error_errno(r, "Failed to glob unit name: %m"); | |
3c5a87a8 | 53 | |
1d84ad94 LP |
54 | r = strv_consume(&arg_wants, n); |
55 | if (r < 0) | |
56 | return log_oom(); | |
3c5a87a8 | 57 | |
1d84ad94 | 58 | } else if (proc_cmdline_key_streq(key, "systemd.debug_shell")) { |
326bb68c LP |
59 | |
60 | if (value) { | |
61 | r = parse_boolean(value); | |
62 | if (r < 0) | |
1d84ad94 | 63 | log_error("Failed to parse systemd.debug_shell= argument '%s', ignoring.", value); |
326bb68c LP |
64 | else |
65 | arg_debug_shell = r; | |
66 | } else | |
67 | arg_debug_shell = true; | |
1d84ad94 | 68 | |
7dcc5671 EV |
69 | } else if (streq(key, "systemd.unit")) { |
70 | ||
1d84ad94 LP |
71 | if (proc_cmdline_value_missing(key, value)) |
72 | return 0; | |
73 | ||
74 | r = free_and_strdup(&arg_default_unit, value); | |
75 | if (r < 0) | |
76 | return log_error_errno(r, "Failed to set default unit %s: %m", value); | |
77 | ||
7dcc5671 EV |
78 | } else if (!value) { |
79 | const char *target; | |
80 | ||
81 | target = runlevel_to_target(key); | |
82 | if (target) { | |
83 | r = free_and_strdup(&arg_default_unit, target); | |
84 | if (r < 0) | |
85 | return log_error_errno(r, "Failed to set default unit %s: %m", target); | |
86 | } | |
326bb68c LP |
87 | } |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | static int generate_mask_symlinks(void) { | |
93 | char **u; | |
94 | int r = 0; | |
95 | ||
96 | if (strv_isempty(arg_mask)) | |
97 | return 0; | |
98 | ||
99 | STRV_FOREACH(u, arg_mask) { | |
3c5a87a8 | 100 | _cleanup_free_ char *p = NULL; |
326bb68c | 101 | |
605405c6 | 102 | p = strjoin(arg_dest, "/", *u); |
326bb68c LP |
103 | if (!p) |
104 | return log_oom(); | |
105 | ||
1f6b4113 | 106 | if (symlink("/dev/null", p) < 0) |
94c156cd LP |
107 | r = log_error_errno(errno, |
108 | "Failed to create mask symlink %s: %m", | |
109 | p); | |
326bb68c LP |
110 | } |
111 | ||
112 | return r; | |
113 | } | |
114 | ||
3c5a87a8 LP |
115 | static int generate_wants_symlinks(void) { |
116 | char **u; | |
117 | int r = 0; | |
326bb68c | 118 | |
3c5a87a8 | 119 | if (strv_isempty(arg_wants)) |
326bb68c LP |
120 | return 0; |
121 | ||
3c5a87a8 LP |
122 | STRV_FOREACH(u, arg_wants) { |
123 | _cleanup_free_ char *p = NULL, *f = NULL; | |
3a8a0ace | 124 | const char *target = arg_default_unit ?: SPECIAL_DEFAULT_TARGET; |
3c5a87a8 | 125 | |
3a8a0ace | 126 | p = strjoin(arg_dest, "/", target, ".wants/", *u); |
3c5a87a8 LP |
127 | if (!p) |
128 | return log_oom(); | |
129 | ||
130 | f = strappend(SYSTEM_DATA_UNIT_PATH "/", *u); | |
131 | if (!f) | |
132 | return log_oom(); | |
326bb68c | 133 | |
3c5a87a8 | 134 | mkdir_parents_label(p, 0755); |
326bb68c | 135 | |
1f6b4113 | 136 | if (symlink(f, p) < 0) |
94c156cd LP |
137 | r = log_error_errno(errno, |
138 | "Failed to create wants symlink %s: %m", | |
139 | p); | |
326bb68c LP |
140 | } |
141 | ||
3c5a87a8 | 142 | return r; |
326bb68c LP |
143 | } |
144 | ||
7a44c7e3 | 145 | static int run(const char *dest, const char *dest_early, const char *dest_late) { |
326bb68c LP |
146 | int r, q; |
147 | ||
7a44c7e3 | 148 | assert_se(arg_dest = dest_early); |
326bb68c | 149 | |
a7dd6d04 | 150 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_RD_STRICT | PROC_CMDLINE_STRIP_RD_PREFIX); |
b5884878 | 151 | if (r < 0) |
da927ba9 | 152 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
326bb68c | 153 | |
3c5a87a8 LP |
154 | if (arg_debug_shell) { |
155 | r = strv_extend(&arg_wants, "debug-shell.service"); | |
4197fde5 LP |
156 | if (r < 0) |
157 | return log_oom(); | |
3c5a87a8 LP |
158 | } |
159 | ||
326bb68c | 160 | r = generate_mask_symlinks(); |
3c5a87a8 | 161 | q = generate_wants_symlinks(); |
326bb68c | 162 | |
4197fde5 | 163 | return r < 0 ? r : q; |
326bb68c | 164 | } |
f60947d9 | 165 | |
7a44c7e3 | 166 | DEFINE_MAIN_GENERATOR_FUNCTION(run); |