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8e1bd70d LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <stdbool.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
8e1bd70d LP |
26 | #include <stdio.h> |
27 | #include <limits.h> | |
28 | ||
29 | #include "log.h" | |
30 | #include "util.h" | |
31 | ||
32 | #define PROC_SYS_PREFIX "/proc/sys/" | |
33 | ||
c1b664d0 | 34 | static int apply_sysctl(const char *property, const char *value) { |
8e1bd70d | 35 | char *p, *n; |
c1b664d0 | 36 | int r = 0, k; |
8e1bd70d LP |
37 | |
38 | log_debug("Setting '%s' to '%s'", property, value); | |
39 | ||
40 | if (!(p = new(char, sizeof(PROC_SYS_PREFIX) + strlen(property)))) { | |
41 | log_error("Out of memory"); | |
c1b664d0 | 42 | return -ENOMEM; |
8e1bd70d LP |
43 | } |
44 | ||
45 | n = stpcpy(p, PROC_SYS_PREFIX); | |
46 | strcpy(n, property); | |
47 | ||
48 | for (; *n; n++) | |
49 | if (*n == '.') | |
50 | *n = '/'; | |
51 | ||
c1b664d0 | 52 | if ((k = write_one_line_file(p, value)) < 0) { |
5707631e | 53 | |
c1b664d0 LP |
54 | log_full(k == -ENOENT ? LOG_DEBUG : LOG_WARNING, |
55 | "Failed to write '%s' to '%s': %s", value, p, strerror(-k)); | |
24a35973 | 56 | |
c1b664d0 LP |
57 | if (k != -ENOENT && r == 0) |
58 | r = k; | |
8e1bd70d LP |
59 | } |
60 | ||
61 | free(p); | |
c1b664d0 LP |
62 | |
63 | return r; | |
8e1bd70d LP |
64 | } |
65 | ||
c1b664d0 | 66 | static int apply_file(const char *path, bool ignore_enoent) { |
8e1bd70d | 67 | FILE *f; |
c1b664d0 | 68 | int r = 0; |
8e1bd70d LP |
69 | |
70 | assert(path); | |
71 | ||
72 | if (!(f = fopen(path, "re"))) { | |
c1b664d0 LP |
73 | if (ignore_enoent && errno == ENOENT) |
74 | return 0; | |
75 | ||
8e1bd70d | 76 | log_error("Failed to open file '%s', ignoring: %m", path); |
c1b664d0 | 77 | return -errno; |
8e1bd70d LP |
78 | } |
79 | ||
80 | while (!feof(f)) { | |
81 | char l[LINE_MAX], *p, *value; | |
c1b664d0 | 82 | int k; |
8e1bd70d LP |
83 | |
84 | if (!fgets(l, sizeof(l), f)) { | |
85 | if (feof(f)) | |
86 | break; | |
87 | ||
88 | log_error("Failed to read file '%s', ignoring: %m", path); | |
c1b664d0 | 89 | r = -errno; |
8e1bd70d LP |
90 | goto finish; |
91 | } | |
92 | ||
93 | p = strstrip(l); | |
94 | ||
95 | if (!*p) | |
96 | continue; | |
97 | ||
98 | if (strchr(COMMENTS, *p)) | |
99 | continue; | |
100 | ||
101 | if (!(value = strchr(p, '='))) { | |
102 | log_error("Line is not an assignment in file '%s': %s", path, value); | |
c1b664d0 LP |
103 | |
104 | if (r == 0) | |
105 | r = -EINVAL; | |
8e1bd70d LP |
106 | continue; |
107 | } | |
108 | ||
109 | *value = 0; | |
110 | value++; | |
111 | ||
c1b664d0 LP |
112 | if ((k = apply_sysctl(strstrip(p), strstrip(value))) < 0 && r == 0) |
113 | r = k; | |
8e1bd70d LP |
114 | } |
115 | ||
116 | finish: | |
117 | fclose(f); | |
c1b664d0 LP |
118 | |
119 | return r; | |
8e1bd70d LP |
120 | } |
121 | ||
c1b664d0 LP |
122 | static int scandir_filter(const struct dirent *d) { |
123 | assert(d); | |
8e1bd70d | 124 | |
c1b664d0 | 125 | if (ignore_file(d->d_name)) |
8e1bd70d LP |
126 | return 0; |
127 | ||
c1b664d0 LP |
128 | if (d->d_type != DT_REG && |
129 | d->d_type != DT_LNK && | |
130 | d->d_type != DT_UNKNOWN) | |
8e1bd70d LP |
131 | return 0; |
132 | ||
c1b664d0 LP |
133 | return endswith(d->d_name, ".conf"); |
134 | } | |
135 | ||
136 | static int apply_tree(const char *path) { | |
137 | struct dirent **de = NULL; | |
138 | int n, i, r = 0; | |
139 | ||
140 | if ((n = scandir(path, &de, scandir_filter, alphasort)) < 0) { | |
141 | ||
142 | if (errno == ENOENT) | |
143 | return 0; | |
144 | ||
145 | log_error("Failed to enumerate %s files: %m", path); | |
146 | return -errno; | |
147 | } | |
8e1bd70d | 148 | |
c1b664d0 LP |
149 | for (i = 0; i < n; i++) { |
150 | char *fn; | |
151 | int k; | |
152 | ||
153 | k = asprintf(&fn, "%s/%s", path, de[i]->d_name); | |
154 | free(de[i]); | |
155 | ||
156 | if (k < 0) { | |
157 | log_error("Failed to allocate file name."); | |
158 | ||
159 | if (r == 0) | |
160 | r = -ENOMEM; | |
161 | continue; | |
162 | } | |
163 | ||
164 | if ((k = apply_file(fn, true)) < 0 && r == 0) | |
165 | r = k; | |
166 | } | |
167 | ||
168 | free(de); | |
169 | ||
170 | return r; | |
171 | } | |
8e1bd70d LP |
172 | |
173 | int main(int argc, char *argv[]) { | |
c1b664d0 | 174 | int r = 0; |
8e1bd70d LP |
175 | |
176 | if (argc > 2) { | |
177 | log_error("This program expects one or no arguments."); | |
178 | return EXIT_FAILURE; | |
179 | } | |
180 | ||
181 | log_set_target(LOG_TARGET_AUTO); | |
182 | log_parse_environment(); | |
183 | log_open(); | |
184 | ||
185 | if (argc > 1) | |
c1b664d0 | 186 | r = apply_file(argv[1], false); |
8e1bd70d | 187 | else { |
c1b664d0 LP |
188 | int k; |
189 | ||
190 | r = apply_file("/etc/sysctl.conf", true); | |
191 | ||
192 | if ((k = apply_tree("/etc/sysctl.d")) < 0 && r == 0) | |
193 | r = k; | |
8e1bd70d LP |
194 | } |
195 | ||
c1b664d0 | 196 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
8e1bd70d | 197 | } |