2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/param.h>
37 #include <sys/mount.h>
38 #include <sys/types.h>
44 static void config_get(const char *dirpath, struct hammer_ioc_config *config);
45 static void config_set(const char *dirpath, struct hammer_ioc_config *config);
46 static void config_remove_path(void);
51 * hammer config [<fs> [configfile]]
53 * Prints out the hammer cleanup configuration for the specified HAMMER
54 * filesystem(s) or the current filesystem.
57 hammer_cmd_config(char **av, int ac)
59 struct hammer_ioc_config config;
64 bzero(&config, sizeof(config));
66 config_get(".", &config);
67 if (config.head.error == 0) {
68 printf("%s", config.config.text);
70 errx(2, "hammer config: no configuration found");
77 config_get(dirpath, &config);
78 if (config.head.error == 0) {
79 printf("%s", config.config.text);
81 errx(2, "hammer config: no configuration found");
86 config_get(dirpath, &config); /* ignore errors */
87 config.head.error = 0;
89 fd = open(av[1], O_RDONLY);
90 n = read(fd, config.config.text, sizeof(config.config.text) - 1);
91 if (n == sizeof(config.config.text) - 1) {
92 err(2, "hammer config: config file too big, limit %zu bytes",
93 sizeof(config.config.text) - 1);
96 bzero(config.config.text + n, sizeof(config.config.text) - n);
97 config_set(dirpath, &config);
102 * hammer viconfig [<fs>]
105 hammer_cmd_viconfig(char **av, int ac)
107 struct hammer_ioc_config config;
108 struct timeval times[2];
117 errx(1, "hammer viconfig: 0 or 1 argument (<fs>) only");
124 config_get(dirpath, &config);
125 if (config.head.error == ENOENT) {
126 snprintf(config.config.text, sizeof(config.config.text),
128 "# No configuration present, here are some defaults\n"
129 "# you can uncomment. Also remove these instructions\n"
131 "#snapshots 1d 60d\n"
136 "#rebalance 1d 5m\n");
137 config.head.error = 0;
139 if (config.head.error) {
140 errx(2, "hammer viconfig: read config failed error: %s",
141 strerror(config.head.error));
146 * Edit a temporary file and write back if it was modified.
147 * Adjust the mtime back one second so a quick edit is not
148 * improperly detected as not having been modified.
150 snprintf(path, sizeof(path), "/tmp/configXXXXXXXXXX");
153 atexit(config_remove_path);
155 fd = open(path, O_RDWR|O_CREAT|O_TRUNC, 0600);
157 err(2, "hammer viconfig: creating temporary file %s", path);
158 write(fd, config.config.text, strlen(config.config.text));
159 if (fstat(fd, &st) < 0)
160 err(2, "hammer viconfig");
161 times[0].tv_sec = st.st_mtime - 1;
162 times[0].tv_usec = 0;
167 asprintf(&runcmd, "vi %s", path);
170 if (stat(path, &st) < 0)
171 err(2, "hammer viconfig: unable to stat file after vi");
172 if (times[0].tv_sec == st.st_mtime) {
173 printf("hammer viconfig: no changes were made\n");
177 fd = open(path, O_RDONLY);
179 err(2, "hammer viconfig: unable to read %s", path);
181 n = read(fd, config.config.text, sizeof(config.config.text) - 1);
183 err(2, "hammer viconfig: unable to read %s", path);
184 if (n == sizeof(config.config.text) - 1) {
185 err(2, "hammer config: config file too big, limit %zu bytes",
186 sizeof(config.config.text) - 1);
189 bzero(config.config.text + n, sizeof(config.config.text) - n);
190 config_set(dirpath, &config);
194 config_get(const char *dirpath, struct hammer_ioc_config *config)
196 struct hammer_ioc_version version;
199 bzero(&version, sizeof(version));
200 if ((fd = open(dirpath, O_RDONLY)) < 0)
201 err(2, "hammer config: unable to open directory %s", dirpath);
202 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0)
203 errx(2, "hammer config: not a HAMMER filesystem!");
205 if (ioctl(fd, HAMMERIOC_GET_CONFIG, config) < 0)
206 errx(2, "hammer config: config_get");
211 config_set(const char *dirpath, struct hammer_ioc_config *config)
213 struct hammer_ioc_version version;
216 bzero(&version, sizeof(version));
217 if ((fd = open(dirpath, O_RDONLY)) < 0)
218 errx(2, "hammer config: unable to open directory %s", dirpath);
219 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0)
220 errx(2, "hammer config: not a HAMMER filesystem!");
221 if (ioctl(fd, HAMMERIOC_SET_CONFIG, config) < 0)
222 errx(2, "hammer config: config_set");
227 config_remove_path(void)