NetBSD/sbin/luactl/luactl.c

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2013-10-29 20:11:15 +04:00
/* $NetBSD: luactl.c,v 1.2 2013/10/29 16:11:15 joerg Exp $ */
/*
* Copyright (c) 2011, Marc Balmer <mbalmer@NetBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the Author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Program to control Lua devices.
*/
#include <stdbool.h>
#include <sys/param.h>
#include <sys/lua.h>
#include <sys/ioctl.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int devfd = -1;
int quiet = 0;
int docreate = 0;
static void getinfo(void);
static void create(char *, char *);
static void destroy(char *);
static void require(char *, char *);
static void load(char *, char *);
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static void usage(void) __dead;
#define _PATH_DEV_LUA "/dev/lua"
int
main(int argc, char *argv[])
{
int ch;
while ((ch = getopt(argc, argv, "cq")) != -1)
switch (ch) {
case 'c':
docreate = 1;
break;
case 'q':
quiet = 1;
break;
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
if ((devfd = open(_PATH_DEV_LUA, O_RDWR)) == -1)
err(EXIT_FAILURE, "%s", _PATH_DEV_LUA);
if (argc == 0)
getinfo();
else if (!strcmp(argv[0], "create")) {
if (argc == 2)
create(argv[1], NULL);
else if (argc == 3)
create(argv[1], argv[2]);
else
usage();
} else if (!strcmp(argv[0], "destroy")) {
if (argc != 2)
usage();
destroy(argv[1]);
} else if (!strcmp(argv[0], "require")) {
if (argc != 3)
usage();
if (docreate)
create(argv[1], NULL);
require(argv[1], argv[2]);
} else if (!strcmp(argv[0], "load")) {
if (argc != 3)
usage();
if (docreate)
create(argv[1], NULL);
load(argv[1], argv[2]);
} else
usage();
return EXIT_SUCCESS;
}
static void
getinfo(void)
{
struct lua_info info;
int n;
info.states = NULL;
if (ioctl(devfd, LUAINFO, &info) == -1)
err(EXIT_FAILURE, "LUAINFO");
if (info.num_states > 0) {
info.states = calloc(info.num_states,
sizeof(struct lua_state_info));
if (info.states == NULL)
err(EXIT_FAILURE, "calloc");
if (ioctl(devfd, LUAINFO, &info) == -1)
err(EXIT_FAILURE, "LUAINFO");
}
printf("%d active state%s:\n", info.num_states,
info.num_states == 1 ? "" : "s");
if (info.num_states > 0)
printf("%-16s %-8s Description\n", "Name", "Creator");
for (n = 0; n < info.num_states; n++)
printf("%-16s %-8s %s\n", info.states[n].name,
info.states[n].user == true ? "user" : "kernel",
info.states[n].desc);
}
static void
create(char *name, char *desc)
{
struct lua_create cr;
strlcpy(cr.name, name, sizeof(cr.name));
if (desc != NULL)
strlcpy(cr.desc, desc, sizeof(cr.desc));
else
cr.desc[0] = '\0';
if (ioctl(devfd, LUACREATE, &cr) == -1)
err(EXIT_FAILURE, "LUACREATE");
if (quiet)
return;
printf("%s created\n", name);
}
static void
destroy(char *name)
{
struct lua_create cr;
strlcpy(cr.name, name, sizeof(cr.name));
if (ioctl(devfd, LUADESTROY, &cr) == -1)
err(EXIT_FAILURE, "LUADESTROY");
if (quiet)
return;
printf("%s destroyed\n", name);
}
static void
require(char *name, char *module)
{
struct lua_require r;
strlcpy(r.state, name, sizeof(r.state));
strlcpy(r.module, module, sizeof(r.module));
if (ioctl(devfd, LUAREQUIRE, &r) == -1)
err(EXIT_FAILURE, "LUAREQUIRE");
if (quiet)
return;
printf("%s required by %s\n", module, name);
}
static void
load(char *name, char *path)
{
struct lua_load l;
strlcpy(l.state, name, sizeof(l.state));
strlcpy(l.path, path, sizeof(l.path));
if (ioctl(devfd, LUALOAD, &l) == -1)
err(EXIT_FAILURE, "LUALOAD");
if (quiet)
return;
printf("%s loaded into %s\n", path, name);
}
static void
usage(void)
{
const char *p;
p = getprogname();
fprintf(stderr, "usage: %s [-cq]\n", p);
fprintf(stderr, " %s [-cq] create name [desc]\n", p);
fprintf(stderr, " %s [-cq] destroy name\n", p);
fprintf(stderr, " %s [-cq] require name module\n", p);
fprintf(stderr, " %s [-cq] load name path\n", p);
exit(EXIT_FAILURE);
}