1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdlib.h>
#include <stdbool.h>
#include <errno.h>
#include <string.h>
#include <ftw.h>
#include <stdio.h>
#include <limits.h>
#include "log.h"
#include "util.h"
#define PROC_SYS_PREFIX "/proc/sys/"
static int exit_code = 0;
static void apply_sysctl(const char *property, const char *value) {
char *p, *n;
int r;
log_debug("Setting '%s' to '%s'", property, value);
if (!(p = new(char, sizeof(PROC_SYS_PREFIX) + strlen(property)))) {
log_error("Out of memory");
exit_code = -ENOMEM;
}
n = stpcpy(p, PROC_SYS_PREFIX);
strcpy(n, property);
for (; *n; n++)
if (*n == '.')
*n = '/';
if ((r = write_one_line_file(p, value)) < 0) {
log_full(r == -ENOENT ? LOG_DEBUG : LOG_WARNING,
"Failed to write '%s' to '%s': %s", value, p, strerror(-r));
if (r != -ENOENT)
exit_code = r;
}
free(p);
}
static void apply_file(const char *path) {
FILE *f;
assert(path);
if (!(f = fopen(path, "re"))) {
log_error("Failed to open file '%s', ignoring: %m", path);
exit_code = -errno;
return;
}
while (!feof(f)) {
char l[LINE_MAX], *p, *value;
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
log_error("Failed to read file '%s', ignoring: %m", path);
exit_code = -errno;
goto finish;
}
p = strstrip(l);
if (!*p)
continue;
if (strchr(COMMENTS, *p))
continue;
if (!(value = strchr(p, '='))) {
log_error("Line is not an assignment in file '%s': %s", path, value);
exit_code = -EINVAL;
continue;
}
*value = 0;
value++;
apply_sysctl(strstrip(p), strstrip(value));
}
finish:
fclose(f);
}
static int nftw_cb(
const char *fpath,
const struct stat *sb,
int tflag,
struct FTW *ftwbuf) {
if (tflag != FTW_F)
return 0;
if (ignore_file(fpath + ftwbuf->base))
return 0;
if (!endswith(fpath, ".conf"))
return 0;
apply_file(fpath);
return 0;
};
int main(int argc, char *argv[]) {
if (argc > 2) {
log_error("This program expects one or no arguments.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
if (argc > 1)
nftw(argv[1], nftw_cb, 64, FTW_MOUNT|FTW_PHYS);
else {
nftw("/etc/sysctl.conf", nftw_cb, 64, FTW_MOUNT|FTW_PHYS);
nftw("/etc/sysctl.d", nftw_cb, 64, FTW_MOUNT|FTW_PHYS);
}
return exit_code < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
|
