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Diffstat (limited to 'utilities/ovs-cfg-mod.c')
| -rw-r--r-- | utilities/ovs-cfg-mod.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/utilities/ovs-cfg-mod.c b/utilities/ovs-cfg-mod.c new file mode 100644 index 000000000..53ebd00a9 --- /dev/null +++ b/utilities/ovs-cfg-mod.c @@ -0,0 +1,239 @@ +/* Copyright (c) 2008, 2009 Nicira Networks + * + * This program 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 3 of the License, or + * (at your option) any later version. + * + * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. + * + * In addition, as a special exception, Nicira Networks gives permission + * to link the code of its release of vswitchd with the OpenSSL project's + * "OpenSSL" library (or with modified versions of it that use the same + * license as the "OpenSSL" library), and distribute the linked + * executables. You must obey the GNU General Public License in all + * respects for all of the code used other than "OpenSSL". If you modify + * this file, you may extend this exception to your version of the file, + * but you are not obligated to do so. If you do not wish to do so, + * delete this exception statement from your version. + */ +#include <config.h> + +#include <dirent.h> +#include <errno.h> +#include <getopt.h> +#include <stdarg.h> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> + +#include "cfg.h" +#include "command-line.h" +#include "svec.h" +#include "timeval.h" +#include "util.h" + +#define THIS_MODULE VLM_cfg_mod +#include "vlog.h" + +/* Configuration when we first read the configuration file. */ +static struct svec orig_cfg = SVEC_EMPTY_INITIALIZER; + +static void +usage(char *prog_name, int exit_code) +{ + printf("Usage: %s --config-file=FILE ACTIONS\n" + "\nConfig:\n" + " -T, --timeout=MS wait at most MS milliseconds for lock\n" + " -F, --config-file=FILE use configuration FILE\n" + "\nActions:\n" + " -a, --add=ENTRY add ENTRY\n" + " -d, --del-entry=ENTRY delete ENTRY\n" + " -D, --del-section=KEY delete section matching KEY\n" + " --del-match=PATTERN delete entries matching shell PATTERN\n" + " -q, --query=KEY return all entries matching KEY\n" + " -c, --log-changes log changes up to this point\n" + "\nOther options:\n" + " -h, --help display this help message\n" + " -V, --version display version information\n", + prog_name); + exit(exit_code); +} + +static void +open_config(char *config_file, int timeout) +{ + int error; + + error = cfg_set_file(config_file); + if (error) { + ovs_fatal(error, "failed to add configuration file \"%s\"", + config_file); + } + + error = cfg_lock(NULL, timeout); + if (error) { + ovs_fatal(error, "could not lock configuration file\n"); + } + + cfg_get_all(&orig_cfg); +} + +static void +print_vals(char *key) +{ + struct svec vals; + int i; + + svec_init(&vals); + cfg_get_all_strings(&vals, "%s", key); + + for (i=0; i<vals.n; i++) { + printf("%s\n", vals.names[i]); + } +} + +static void +log_diffs(void) +{ + struct svec new_cfg, removed, added; + size_t i; + + svec_init(&new_cfg); + cfg_get_all(&new_cfg); + svec_diff(&orig_cfg, &new_cfg, &removed, NULL, &added); + if (removed.n || added.n) { + VLOG_INFO("configuration changes:"); + for (i = 0; i < removed.n; i++) { + VLOG_INFO("-%s", removed.names[i]); + } + for (i = 0; i < added.n; i++) { + VLOG_INFO("+%s", added.names[i]); + } + } else { + VLOG_INFO("configuration unchanged"); + } + svec_destroy(&added); + svec_destroy(&removed); + svec_swap(&new_cfg, &orig_cfg); + svec_destroy(&new_cfg); +} + +int main(int argc, char *argv[]) +{ + enum { + OPT_DEL_MATCH = UCHAR_MAX + 1, + }; + static const struct option long_options[] = { + {"config-file", required_argument, 0, 'F'}, + {"timeout", required_argument, 0, 'T'}, + {"add", required_argument, 0, 'a'}, + {"del-entry", required_argument, 0, 'd'}, + {"del-section", required_argument, 0, 'D'}, + {"del-match", required_argument, 0, OPT_DEL_MATCH}, + {"query", required_argument, 0, 'q'}, + {"changes", no_argument, 0, 'c'}, + {"verbose", optional_argument, 0, 'v'}, + {"help", no_argument, 0, 'h'}, + {"version", no_argument, 0, 'V'}, + {0, 0, 0, 0}, + }; + char *short_options; + bool config_set = false; + int timeout = INT_MAX; + + set_program_name(argv[0]); + time_init(); + vlog_init(); + + short_options = long_options_to_short_options(long_options); + for (;;) { + int option; + + option = getopt_long(argc, argv, short_options, long_options, NULL); + if (option == -1) { + break; + } + + if ((option > UCHAR_MAX || !strchr("FhVv?", option)) + && config_set == false) { + ovs_fatal(0, "no config file specified (use --help for help)"); + } + + switch (option) { + case 'T': + if (config_set) { + ovs_fatal(0, "--timeout or -T must be specified " + "before --file or -F"); + } + timeout = atoi(optarg); + break; + + case 'F': + open_config(optarg, timeout); + config_set = true; + break; + + case 'a': + cfg_add_entry("%s", optarg); + break; + + case 'd': + cfg_del_entry("%s", optarg); + break; + + case 'D': + cfg_del_section("%s", optarg); + break; + + case OPT_DEL_MATCH: + cfg_del_match("%s", optarg); + break; + + case 'q': + print_vals(optarg); + break; + + case 'c': + log_diffs(); + break; + + case 'h': + usage(argv[0], EXIT_SUCCESS); + break; + + case 'V': + OVS_PRINT_VERSION(0, 0); + exit(EXIT_SUCCESS); + + case 'v': + vlog_set_verbosity(optarg); + break; + + case '?': + exit(EXIT_FAILURE); + + default: + NOT_REACHED(); + } + } + free(short_options); + + if (optind != argc) { + ovs_fatal(0, "non-option arguments not accepted " + "(use --help for help)"); + } + + if (cfg_is_dirty()) { + cfg_write(); + } + cfg_unlock(); + + exit(0); +} |