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e48fdd84 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2014 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
a8fbdf54 | 20 | #include <errno.h> |
e48fdd84 LP |
21 | #include <unistd.h> |
22 | ||
b5efdb8a | 23 | #include "alloc-util.h" |
4f5dd394 LP |
24 | #include "dropin.h" |
25 | #include "escape.h" | |
3ffd4af2 | 26 | #include "fd-util.h" |
4f5dd394 LP |
27 | #include "fileio.h" |
28 | #include "fstab-util.h" | |
3ffd4af2 | 29 | #include "generator.h" |
a8fbdf54 TA |
30 | #include "log.h" |
31 | #include "macro.h" | |
e48fdd84 | 32 | #include "mkdir.h" |
4f5dd394 LP |
33 | #include "path-util.h" |
34 | #include "special.h" | |
07630cea | 35 | #include "string-util.h" |
a8fbdf54 | 36 | #include "time-util.h" |
e48fdd84 | 37 | #include "unit-name.h" |
4f5dd394 | 38 | #include "util.h" |
e48fdd84 | 39 | |
b559616f ZJS |
40 | int generator_add_symlink(const char *root, const char *dst, const char *dep_type, const char *src) { |
41 | /* Adds a symlink from <dst>.<dep_type>.d/ to ../<src> */ | |
42 | ||
43 | const char *from, *to; | |
44 | ||
45 | from = strjoina("../", src); | |
46 | to = strjoina(root, "/", dst, ".", dep_type, "/", src); | |
47 | ||
48 | mkdir_parents_label(to, 0755); | |
49 | if (symlink(from, to) < 0) | |
7f0cc637 ZJS |
50 | if (errno != EEXIST) |
51 | return log_error_errno(errno, "Failed to create symlink \"%s\": %m", to); | |
b559616f ZJS |
52 | |
53 | return 0; | |
54 | } | |
55 | ||
4dda4e63 | 56 | static int write_fsck_sysroot_service(const char *dir, const char *what) { |
85eca92e | 57 | _cleanup_free_ char *device = NULL, *escaped = NULL; |
4dda4e63 | 58 | _cleanup_fclose_ FILE *f = NULL; |
85eca92e | 59 | const char *unit; |
4dda4e63 ZJS |
60 | int r; |
61 | ||
fa05e972 AB |
62 | escaped = cescape(what); |
63 | if (!escaped) | |
64 | return log_oom(); | |
65 | ||
4dda4e63 ZJS |
66 | unit = strjoina(dir, "/systemd-fsck-root.service"); |
67 | log_debug("Creating %s", unit); | |
68 | ||
69 | r = unit_name_from_path(what, ".device", &device); | |
70 | if (r < 0) | |
71 | return log_error_errno(r, "Failed to convert device \"%s\" to unit name: %m", what); | |
72 | ||
73 | f = fopen(unit, "wxe"); | |
74 | if (!f) | |
75 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
76 | ||
77 | fprintf(f, | |
78 | "# Automatically generated by %1$s\n\n" | |
79 | "[Unit]\n" | |
80 | "Documentation=man:systemd-fsck-root.service(8)\n" | |
81 | "Description=File System Check on %2$s\n" | |
82 | "DefaultDependencies=no\n" | |
83 | "BindsTo=%3$s\n" | |
0900593e | 84 | "After=initrd-root-device.target local-fs-pre.target %3$s\n" |
4dda4e63 ZJS |
85 | "Before=shutdown.target\n" |
86 | "\n" | |
87 | "[Service]\n" | |
88 | "Type=oneshot\n" | |
89 | "RemainAfterExit=yes\n" | |
fa05e972 | 90 | "ExecStart=" SYSTEMD_FSCK_PATH " %4$s\n" |
4dda4e63 ZJS |
91 | "TimeoutSec=0\n", |
92 | program_invocation_short_name, | |
93 | what, | |
fa05e972 AB |
94 | device, |
95 | escaped); | |
4dda4e63 | 96 | |
2929b4a6 LP |
97 | r = fflush_and_check(f); |
98 | if (r < 0) | |
99 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
4dda4e63 ZJS |
100 | |
101 | return 0; | |
102 | } | |
103 | ||
e48fdd84 LP |
104 | int generator_write_fsck_deps( |
105 | FILE *f, | |
2e852276 | 106 | const char *dir, |
e48fdd84 LP |
107 | const char *what, |
108 | const char *where, | |
6db615c1 | 109 | const char *fstype) { |
e48fdd84 | 110 | |
7410616c LP |
111 | int r; |
112 | ||
e48fdd84 | 113 | assert(f); |
2e852276 | 114 | assert(dir); |
6db615c1 LP |
115 | assert(what); |
116 | assert(where); | |
e48fdd84 LP |
117 | |
118 | if (!is_device_path(what)) { | |
119 | log_warning("Checking was requested for \"%s\", but it is not a device.", what); | |
120 | return 0; | |
121 | } | |
122 | ||
6db615c1 | 123 | if (!isempty(fstype) && !streq(fstype, "auto")) { |
eb66db55 | 124 | r = fsck_exists(fstype); |
85eca92e LP |
125 | if (r < 0) |
126 | log_warning_errno(r, "Checking was requested for %s, but couldn't detect if fsck.%s may be used, proceeding: %m", what, fstype); | |
127 | else if (r == 0) { | |
e48fdd84 | 128 | /* treat missing check as essentially OK */ |
85eca92e | 129 | log_debug("Checking was requested for %s, but fsck.%s does not exist.", what, fstype); |
571d0134 | 130 | return 0; |
85eca92e | 131 | } |
e48fdd84 LP |
132 | } |
133 | ||
2e852276 | 134 | if (path_equal(where, "/")) { |
85eca92e | 135 | const char *lnk; |
e48fdd84 | 136 | |
2e852276 | 137 | lnk = strjoina(dir, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service"); |
e48fdd84 LP |
138 | |
139 | mkdir_parents(lnk, 0755); | |
4a62c710 MS |
140 | if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-fsck-root.service", lnk) < 0) |
141 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
e48fdd84 LP |
142 | |
143 | } else { | |
4dda4e63 ZJS |
144 | _cleanup_free_ char *_fsck = NULL; |
145 | const char *fsck; | |
146 | ||
147 | if (in_initrd() && path_equal(where, "/sysroot")) { | |
148 | r = write_fsck_sysroot_service(dir, what); | |
149 | if (r < 0) | |
150 | return r; | |
151 | ||
152 | fsck = "systemd-fsck-root.service"; | |
153 | } else { | |
154 | r = unit_name_from_path_instance("systemd-fsck", what, ".service", &_fsck); | |
155 | if (r < 0) | |
156 | return log_error_errno(r, "Failed to create fsck service name: %m"); | |
157 | ||
158 | fsck = _fsck; | |
159 | } | |
e48fdd84 LP |
160 | |
161 | fprintf(f, | |
f32b43bd | 162 | "Requires=%1$s\n" |
2e852276 | 163 | "After=%1$s\n", |
e48fdd84 LP |
164 | fsck); |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
29686440 | 169 | |
2e852276 ZJS |
170 | int generator_write_timeouts( |
171 | const char *dir, | |
172 | const char *what, | |
173 | const char *where, | |
174 | const char *opts, | |
175 | char **filtered) { | |
29686440 ZJS |
176 | |
177 | /* Allow configuration how long we wait for a device that | |
178 | * backs a mount point to show up. This is useful to support | |
179 | * endless device timeouts for devices that show up only after | |
180 | * user input, like crypto devices. */ | |
181 | ||
d15d0333 | 182 | _cleanup_free_ char *node = NULL, *unit = NULL, *timeout = NULL; |
29686440 ZJS |
183 | usec_t u; |
184 | int r; | |
29686440 | 185 | |
0004f698 ZJS |
186 | r = fstab_filter_options(opts, "comment=systemd.device-timeout\0" |
187 | "x-systemd.device-timeout\0", | |
d15d0333 ZJS |
188 | NULL, &timeout, filtered); |
189 | if (r <= 0) | |
190 | return r; | |
b3208b66 | 191 | |
0004f698 | 192 | r = parse_sec_fix_0(timeout, &u); |
29686440 | 193 | if (r < 0) { |
7410616c | 194 | log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); |
29686440 ZJS |
195 | return 0; |
196 | } | |
197 | ||
198 | node = fstab_node_to_udev_node(what); | |
199 | if (!node) | |
200 | return log_oom(); | |
c67bd1f7 N |
201 | if (!is_device_path(node)) { |
202 | log_warning("x-systemd.device-timeout ignored for %s", what); | |
203 | return 0; | |
204 | } | |
29686440 | 205 | |
7410616c LP |
206 | r = unit_name_from_path(node, ".device", &unit); |
207 | if (r < 0) | |
208 | return log_error_errno(r, "Failed to make unit name from path: %m"); | |
29686440 | 209 | |
8eea8687 ZJS |
210 | return write_drop_in_format(dir, unit, 50, "device-timeout", |
211 | "# Automatically generated by %s\n\n" | |
d9732d78 | 212 | "[Unit]\nJobRunningTimeoutSec=%s", |
10c71477 | 213 | program_invocation_short_name, timeout); |
29686440 | 214 | } |
7163e1ca | 215 | |
4195077a MK |
216 | int generator_write_device_deps( |
217 | const char *dir, | |
218 | const char *what, | |
219 | const char *where, | |
220 | const char *opts) { | |
221 | ||
222 | /* fstab records that specify _netdev option should apply the network | |
223 | * ordering on the actual device depending on network connection. If we | |
224 | * are not mounting real device (NFS, CIFS), we rely on _netdev effect | |
225 | * on the mount unit itself. */ | |
226 | ||
227 | _cleanup_free_ char *node = NULL, *unit = NULL; | |
228 | int r; | |
229 | ||
230 | if (!fstab_test_option(opts, "_netdev\0")) | |
231 | return 0; | |
232 | ||
233 | node = fstab_node_to_udev_node(what); | |
234 | if (!node) | |
235 | return log_oom(); | |
236 | ||
237 | /* Nothing to apply dependencies to. */ | |
238 | if (!is_device_path(node)) | |
239 | return 0; | |
240 | ||
241 | r = unit_name_from_path(node, ".device", &unit); | |
242 | if (r < 0) | |
243 | return log_error_errno(r, "Failed to make unit name from path: %m"); | |
244 | ||
245 | /* See mount_add_default_dependencies for explanation why we create such | |
246 | * dependencies. */ | |
247 | return write_drop_in_format(dir, unit, 50, "netdev-dependencies", | |
248 | "# Automatically generated by %s\n\n" | |
249 | "[Unit]\n" | |
250 | "After=" SPECIAL_NETWORK_ONLINE_TARGET " " SPECIAL_NETWORK_TARGET "\n" | |
251 | "Wants=" SPECIAL_NETWORK_ONLINE_TARGET "\n", | |
252 | program_invocation_short_name); | |
253 | } | |
254 | ||
7163e1ca DD |
255 | int generator_write_initrd_root_device_deps(const char *dir, const char *what) { |
256 | _cleanup_free_ char *unit = NULL; | |
257 | int r; | |
258 | ||
259 | r = unit_name_from_path(what, ".device", &unit); | |
260 | if (r < 0) | |
261 | return log_error_errno(r, "Failed to make unit name from path: %m"); | |
262 | ||
263 | return write_drop_in_format(dir, SPECIAL_INITRD_ROOT_DEVICE_TARGET, 50, "root-device", | |
264 | "# Automatically generated by %s\n\n" | |
265 | "[Unit]\nRequires=%s\nAfter=%s", | |
266 | program_invocation_short_name, unit, unit); | |
267 | } |