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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #include "util.h" | |
26 | #include "special.h" | |
27 | #include "mkdir.h" | |
28 | #include "unit-name.h" | |
29 | #include "generator.h" | |
30 | #include "path-util.h" | |
31 | #include "dropin.h" | |
32 | ||
33 | int generator_write_fsck_deps( | |
34 | FILE *f, | |
35 | const char *dest, | |
36 | const char *what, | |
37 | const char *where, | |
38 | const char *fstype) { | |
39 | ||
40 | assert(f); | |
41 | assert(dest); | |
42 | assert(what); | |
43 | assert(where); | |
44 | ||
45 | if (!is_device_path(what)) { | |
46 | log_warning("Checking was requested for \"%s\", but it is not a device.", what); | |
47 | return 0; | |
48 | } | |
49 | ||
50 | if (!isempty(fstype) && !streq(fstype, "auto")) { | |
51 | int r; | |
52 | r = fsck_exists(fstype); | |
53 | if (r == -ENOENT) { | |
54 | /* treat missing check as essentially OK */ | |
55 | log_debug_errno(r, "Checking was requested for %s, but fsck.%s does not exist: %m", what, fstype); | |
56 | return 0; | |
57 | } else if (r < 0) | |
58 | return log_warning_errno(r, "Checking was requested for %s, but fsck.%s cannot be used: %m", what, fstype); | |
59 | } | |
60 | ||
61 | if (streq(where, "/")) { | |
62 | char *lnk; | |
63 | ||
64 | lnk = strappenda(dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service"); | |
65 | ||
66 | mkdir_parents(lnk, 0755); | |
67 | if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-fsck-root.service", lnk) < 0) { | |
68 | log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
69 | return -errno; | |
70 | } | |
71 | ||
72 | } else { | |
73 | _cleanup_free_ char *fsck = NULL; | |
74 | ||
75 | fsck = unit_name_from_path_instance("systemd-fsck", what, ".service"); | |
76 | if (!fsck) | |
77 | return log_oom(); | |
78 | ||
79 | fprintf(f, | |
80 | "RequiresOverridable=%s\n" | |
81 | "After=%s\n", | |
82 | fsck, | |
83 | fsck); | |
84 | } | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | int generator_write_timeouts(const char *dir, const char *what, const char *where, | |
90 | const char *opts, char **filtered) { | |
91 | ||
92 | /* Allow configuration how long we wait for a device that | |
93 | * backs a mount point to show up. This is useful to support | |
94 | * endless device timeouts for devices that show up only after | |
95 | * user input, like crypto devices. */ | |
96 | ||
97 | _cleanup_free_ char *node = NULL, *unit = NULL, *t = NULL; | |
98 | char *start, *timeout; | |
99 | usec_t u; | |
100 | int r; | |
101 | size_t len; | |
102 | ||
103 | if ((start = mount_test_option(opts, "comment=systemd.device-timeout"))) | |
104 | timeout = start + 31; | |
105 | else if ((start = mount_test_option(opts, "x-systemd.device-timeout"))) | |
106 | timeout = start + 25; | |
107 | else { | |
108 | if (filtered) { | |
109 | *filtered = strdup(opts ?: ""); | |
110 | if (!*filtered) | |
111 | return log_oom(); | |
112 | } | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | len = strcspn(timeout, ",;" WHITESPACE); | |
118 | t = strndup(timeout, len); | |
119 | if (!t) | |
120 | return -ENOMEM; | |
121 | ||
122 | if (filtered) { | |
123 | char *prefix, *postfix; | |
124 | ||
125 | prefix = strndupa(opts, start - opts - (start != opts)); | |
126 | postfix = timeout + len + (start == opts && timeout[len] != '\0'); | |
127 | *filtered = strjoin(prefix, *postfix ? postfix : NULL, NULL); | |
128 | if (!*filtered) | |
129 | return log_oom(); | |
130 | } | |
131 | ||
132 | r = parse_sec(t, &u); | |
133 | if (r < 0) { | |
134 | log_warning("Failed to parse timeout for %s, ignoring: %s", | |
135 | where, timeout); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | node = fstab_node_to_udev_node(what); | |
140 | if (!node) | |
141 | return log_oom(); | |
142 | ||
143 | unit = unit_name_from_path(node, ".device"); | |
144 | if (!unit) | |
145 | return -ENOMEM; | |
146 | ||
147 | return write_drop_in_format(dir, unit, 50, "device-timeout", | |
148 | "# Automatically generated by %s\n\n" | |
149 | "[Unit]\nJobTimeoutSec=" USEC_FMT, | |
150 | program_invocation_short_name, | |
151 | u / USEC_PER_SEC); | |
152 | } |