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/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "command-line.h"
#include "daemon.h"
#include "dirs.h"
#include "openvswitch/dynamic-string.h"
#include "jsonrpc.h"
#include "process.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
#include "openvswitch/vlog.h"
static void usage(void);
static const char *parse_command_line(int argc, char *argv[]);
static struct jsonrpc *connect_to_target(const char *target);
int
main(int argc, char *argv[])
{
char *cmd_result, *cmd_error;
struct jsonrpc *client;
char *cmd, **cmd_argv;
const char *target;
int cmd_argc;
int error;
set_program_name(argv[0]);
/* Parse command line and connect to target. */
target = parse_command_line(argc, argv);
client = connect_to_target(target);
/* Transact request and process reply. */
cmd = argv[optind++];
cmd_argc = argc - optind;
cmd_argv = cmd_argc ? argv + optind : NULL;
error = unixctl_client_transact(client, cmd, cmd_argc, cmd_argv,
&cmd_result, &cmd_error);
if (error) {
ovs_fatal(error, "%s: transaction error", target);
}
if (cmd_error) {
jsonrpc_close(client);
fputs(cmd_error, stderr);
ovs_error(0, "%s: server returned an error", target);
exit(2);
} else if (cmd_result) {
fputs(cmd_result, stdout);
} else {
OVS_NOT_REACHED();
}
jsonrpc_close(client);
free(cmd_result);
free(cmd_error);
return 0;
}
static void
usage(void)
{
printf("\
%s, for querying and controlling Open vSwitch daemon\n\
usage: %s [TARGET] COMMAND [ARG...]\n\
Targets:\n\
-t, --target=TARGET pidfile or socket to contact\n\
Common commands:\n\
list-commands List commands supported by the target\n\
version Print version of the target\n\
vlog/list List current logging levels\n\
vlog/list-pattern List logging patterns for each destination.\n\
vlog/set [SPEC]\n\
Set log levels as detailed in SPEC, which may include:\n\
A valid module name (all modules, by default)\n\
'syslog', 'console', 'file' (all destinations, by default))\n\
'off', 'emer', 'err', 'warn', 'info', or 'dbg' ('dbg', bydefault)\n\
vlog/reopen Make the program reopen its log file\n\
Other options:\n\
--timeout=SECS wait at most SECS seconds for a response\n\
-h, --help Print this helpful information\n\
-V, --version Display ovs-appctl version information\n",
program_name, program_name);
exit(EXIT_SUCCESS);
}
static const char *
parse_command_line(int argc, char *argv[])
{
enum {
OPT_START = UCHAR_MAX + 1,
VLOG_OPTION_ENUMS
};
static const struct option long_options[] = {
{"target", required_argument, NULL, 't'},
{"execute", no_argument, NULL, 'e'},
{"help", no_argument, NULL, 'h'},
{"option", no_argument, NULL, 'o'},
{"version", no_argument, NULL, 'V'},
{"timeout", required_argument, NULL, 'T'},
VLOG_LONG_OPTIONS,
{NULL, 0, NULL, 0},
};
char *short_options_ = ovs_cmdl_long_options_to_short_options(long_options);
char *short_options = xasprintf("+%s", short_options_);
const char *target;
int e_options;
unsigned int timeout = 0;
target = NULL;
e_options = 0;
for (;;) {
int option;
option = getopt_long(argc, argv, short_options, long_options, NULL);
if (option == -1) {
break;
}
switch (option) {
case 't':
if (target) {
ovs_fatal(0, "-t or --target may be specified only once");
}
target = optarg;
break;
case 'e':
/* We ignore -e for compatibility. Older versions specified the
* command as the argument to -e. Since the current version takes
* the command as non-option arguments and we say that -e has no
* arguments, this just works in the common case. */
if (e_options++) {
ovs_fatal(0, "-e or --execute may be speciifed only once");
}
break;
case 'h':
usage();
break;
case 'o':
ovs_cmdl_print_options(long_options);
exit(EXIT_SUCCESS);
case 'T':
if (!str_to_uint(optarg, 10, &timeout) || !timeout) {
ovs_fatal(0, "value %s on -T or --timeout is invalid", optarg);
}
break;
case 'V':
ovs_print_version(0, 0);
exit(EXIT_SUCCESS);
VLOG_OPTION_HANDLERS
case '?':
exit(EXIT_FAILURE);
default:
OVS_NOT_REACHED();
}
}
free(short_options_);
free(short_options);
ctl_timeout_setup(timeout);
if (optind >= argc) {
ovs_fatal(0, "at least one non-option argument is required "
"(use --help for help)");
}
return target ? target : "ovs-vswitchd";
}
static struct jsonrpc *
connect_to_target(const char *target)
{
struct jsonrpc *client;
char *socket_name;
int error;
#ifndef _WIN32
if (target[0] != '/') {
char *pidfile_name;
pid_t pid;
pidfile_name = xasprintf("%s/%s.pid", ovs_rundir(), target);
pid = read_pidfile(pidfile_name);
if (pid < 0) {
ovs_fatal(-pid, "cannot read pidfile \"%s\"", pidfile_name);
}
free(pidfile_name);
socket_name = xasprintf("%s/%s.%ld.ctl",
ovs_rundir(), target, (long int) pid);
#else
/* On windows, if the 'target' contains ':', we make an assumption that
* it is an absolute path. */
if (!strchr(target, ':')) {
socket_name = xasprintf("%s/%s.ctl", ovs_rundir(), target);
#endif
} else {
socket_name = xstrdup(target);
}
error = unixctl_client_create(socket_name, &client);
if (error) {
ovs_fatal(error, "cannot connect to \"%s\"", socket_name);
}
free(socket_name);
return client;
}
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