234 lines
6.5 KiB
C
Executable File
234 lines
6.5 KiB
C
Executable File
/*
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* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2014 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "command-line.h"
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#include "daemon.h"
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#include "dirs.h"
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#include "dynamic-string.h"
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#include "jsonrpc.h"
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#include "process.h"
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#include "timeval.h"
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#include "unixctl.h"
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#include "util.h"
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#include "openvswitch/vlog.h"
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static void usage(void);
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static const char *parse_command_line(int argc, char *argv[]);
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static struct jsonrpc *connect_to_target(const char *target);
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int
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main(int argc, char *argv[])
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{
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char *cmd_result, *cmd_error;
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struct jsonrpc *client;
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char *cmd, **cmd_argv;
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const char *target;
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int cmd_argc;
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int error;
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set_program_name(argv[0]);
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/* Parse command line and connect to target. */
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target = parse_command_line(argc, argv);
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client = connect_to_target(target);
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/* Transact request and process reply. */
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cmd = argv[optind++];
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cmd_argc = argc - optind;
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cmd_argv = cmd_argc ? argv + optind : NULL;
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error = unixctl_client_transact(client, cmd, cmd_argc, cmd_argv,
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&cmd_result, &cmd_error);
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if (error) {
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ovs_fatal(error, "%s: transaction error", target);
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}
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if (cmd_error) {
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jsonrpc_close(client);
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fputs(cmd_error, stderr);
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ovs_error(0, "%s: server returned an error", target);
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exit(2);
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} else if (cmd_result) {
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fputs(cmd_result, stdout);
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} else {
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OVS_NOT_REACHED();
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}
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jsonrpc_close(client);
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free(cmd_result);
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free(cmd_error);
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return 0;
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}
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static void
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usage(void)
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{
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printf("\
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%s, for querying and controlling Open vSwitch daemon\n\
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usage: %s [TARGET] COMMAND [ARG...]\n\
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Targets:\n\
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-t, --target=TARGET pidfile or socket to contact\n\
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Common commands:\n\
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list-commands List commands supported by the target\n\
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version Print version of the target\n\
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vlog/list List current logging levels\n\
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vlog/list-pattern List logging patterns for each destination.\n\
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vlog/set [SPEC]\n\
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Set log levels as detailed in SPEC, which may include:\n\
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A valid module name (all modules, by default)\n\
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'syslog', 'console', 'file' (all destinations, by default))\n\
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'off', 'emer', 'err', 'warn', 'info', or 'dbg' ('dbg', bydefault)\n\
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vlog/reopen Make the program reopen its log file\n\
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Other options:\n\
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--timeout=SECS wait at most SECS seconds for a response\n\
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-h, --help Print this helpful information\n\
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-V, --version Display ovs-appctl version information\n",
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program_name, program_name);
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exit(EXIT_SUCCESS);
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}
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static const char *
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parse_command_line(int argc, char *argv[])
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{
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enum {
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OPT_START = UCHAR_MAX + 1,
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VLOG_OPTION_ENUMS
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};
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static const struct option long_options[] = {
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{"target", required_argument, NULL, 't'},
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{"execute", no_argument, NULL, 'e'},
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{"help", no_argument, NULL, 'h'},
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{"option", no_argument, NULL, 'o'},
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{"version", no_argument, NULL, 'V'},
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{"timeout", required_argument, NULL, 'T'},
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VLOG_LONG_OPTIONS,
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{NULL, 0, NULL, 0},
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};
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char *short_options_ = ovs_cmdl_long_options_to_short_options(long_options);
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char *short_options = xasprintf("+%s", short_options_);
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const char *target;
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int e_options;
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target = NULL;
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e_options = 0;
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for (;;) {
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int option;
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option = getopt_long(argc, argv, short_options, long_options, NULL);
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if (option == -1) {
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break;
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}
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switch (option) {
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case 't':
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if (target) {
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ovs_fatal(0, "-t or --target may be specified only once");
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}
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target = optarg;
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break;
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case 'e':
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/* We ignore -e for compatibility. Older versions specified the
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* command as the argument to -e. Since the current version takes
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* the command as non-option arguments and we say that -e has no
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* arguments, this just works in the common case. */
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if (e_options++) {
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ovs_fatal(0, "-e or --execute may be speciifed only once");
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}
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break;
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case 'h':
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usage();
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break;
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case 'o':
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ovs_cmdl_print_options(long_options);
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exit(EXIT_SUCCESS);
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case 'T':
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time_alarm(atoi(optarg));
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break;
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case 'V':
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ovs_print_version(0, 0);
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exit(EXIT_SUCCESS);
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VLOG_OPTION_HANDLERS
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case '?':
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exit(EXIT_FAILURE);
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default:
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OVS_NOT_REACHED();
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}
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}
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free(short_options_);
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free(short_options);
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if (optind >= argc) {
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ovs_fatal(0, "at least one non-option argument is required "
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"(use --help for help)");
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}
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return target ? target : "ovs-vswitchd";
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}
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static struct jsonrpc *
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connect_to_target(const char *target)
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{
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struct jsonrpc *client;
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char *socket_name;
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int error;
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#ifndef _WIN32
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if (target[0] != '/') {
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char *pidfile_name;
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pid_t pid;
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pidfile_name = xasprintf("%s/%s.pid", ovs_rundir(), target);
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pid = read_pidfile(pidfile_name);
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if (pid < 0) {
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ovs_fatal(-pid, "cannot read pidfile \"%s\"", pidfile_name);
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}
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free(pidfile_name);
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socket_name = xasprintf("%s/%s.%ld.ctl",
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ovs_rundir(), target, (long int) pid);
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#else
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/* On windows, if the 'target' contains ':', we make an assumption that
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* it is an absolute path. */
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if (!strchr(target, ':')) {
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socket_name = xasprintf("%s/%s.ctl", ovs_rundir(), target);
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#endif
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} else {
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socket_name = xstrdup(target);
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}
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error = unixctl_client_create(socket_name, &client);
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if (error) {
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ovs_fatal(error, "cannot connect to \"%s\"", socket_name);
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}
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free(socket_name);
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return client;
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}
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