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/*
* Copyright (c) 2008, 2009, 2010 Nicira Networks.
*
* 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 "dynamic-string.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
static void usage(void);
static const char *parse_command_line(int argc, char *argv[]);
static struct unixctl_client *connect_to_target(const char *target);
int
main(int argc, char *argv[])
{
struct unixctl_client *client;
const char *target;
struct ds request;
int code, error;
char *reply;
int i;
set_program_name(argv[0]);
/* Parse command line and connect to target. */
target = parse_command_line(argc, argv);
client = connect_to_target(target);
/* Compose request. */
ds_init(&request);
for (i = optind; i < argc; i++) {
if (i != optind) {
ds_put_char(&request, ' ');
}
ds_put_cstr(&request, argv[i]);
}
/* Transact request and process reply. */
error = unixctl_client_transact(client, ds_cstr(&request), &code, &reply);
if (error) {
ovs_fatal(error, "%s: transaction error", target);
}
if (code / 100 != 2) {
ovs_error(0, "%s: server returned reply code %03d", target, code);
exit(2);
}
fputs(reply, stdout);
unixctl_client_destroy(client);
free(reply);
ds_destroy(&request);
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:"
" help List commands supported by the target\n"
" vlog/list List current logging levels\n"
" vlog/set MODULE[:FACILITY[:LEVEL]]\n"
" Set MODULE and FACILITY log level to LEVEL\n"
" MODULE may be any valid module name or 'ANY'\n"
" FACILITY may be 'syslog', 'console', 'file', or 'ANY' (default)\n"
" LEVEL may be 'emer', 'err', 'warn', 'info', or 'dbg' (default)\n"
" vlog/reopen Make the program reopen its log file\n"
"Other options:\n"
" -h, --help Print this helpful information\n"
" -V, --version Display version information\n",
program_name, program_name);
exit(EXIT_SUCCESS);
}
static const char *
parse_command_line(int argc, char *argv[])
{
static const struct option long_options[] = {
{"target", required_argument, NULL, 't'},
{"execute", no_argument, NULL, 'e'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{0, 0, 0, 0},
};
const char *target;
int e_options;
target = NULL;
e_options = 0;
for (;;) {
int option;
option = getopt_long(argc, argv, "+t:hVe", 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 'V':
OVS_PRINT_VERSION(0, 0);
exit(EXIT_SUCCESS);
case '?':
exit(EXIT_FAILURE);
default:
NOT_REACHED();
}
}
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 unixctl_client *
connect_to_target(const char *target)
{
struct unixctl_client *client;
char *socket_name;
int error;
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 {
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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