/*
* rfkill userspace tool
*
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
*/
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/poll.h>
#include "rfkill.h"
#include "core.h"
static void rfkill_event(void)
{
unsigned char buf[32];
struct rfkill_event *event = (void *) buf;
struct pollfd p;
ssize_t len;
int fd, n;
fd = open("/dev/rfkill", O_RDONLY);
if (fd < 0) {
perror("Can't open RFKILL control device");
return;
}
memset(&p, 0, sizeof(p));
p.fd = fd;
p.events = POLLIN | POLLHUP;
while (1) {
n = poll(&p, 1, -1);
if (n < 0) {
perror("Failed to poll RFKILL control device");
break;
}
if (n == 0)
continue;
len = read(fd, buf, sizeof(buf));
if (len < 0) {
perror("Reading of RFKILL events failed");
break;
}
if (len != sizeof(struct rfkill_event)) {
fprintf(stderr, "Wrong size of RFKILL event\n");
continue;
}
printf("RFKILL event: idx %u type %u op %u soft %u hard %u\n",
event->idx, event->type, event->op,
event->soft, event->hard);
}
close(fd);
}
static const char *get_name(__u32 idx)
{
static char name[128];
ssize_t len;
char *pos, filename[64];
int fd;
snprintf(filename, sizeof(filename) - 1,
"/sys/class/rfkill/rfkill%u/name", idx);
fd = open(filename, O_RDONLY);
if (fd < 0)
return NULL;
memset(name, 0, sizeof(name));
len = read(fd, name, sizeof(name) - 1);
pos = strchr(name, '\n');
if (pos)
*pos = '\0';
close(fd);
return name;
}
static const char *type2string(enum rfkill_type type)
{
switch (type) {
case RFKILL_TYPE_ALL:
return "All";
case RFKILL_TYPE_WLAN:
return "Wireless LAN";
case RFKILL_TYPE_BLUETOOTH:
return "Bluetooth";
case RFKILL_TYPE_UWB:
return "Ultra-Wideband";
case RFKILL_TYPE_WIMAX:
return "WiMAX";
case RFKILL_TYPE_WWAN:
return "Wireless WAN";
case NUM_RFKILL_TYPES:
return NULL;
}
return NULL;
}
static void rfkill_list(void)
{
unsigned char buf[32];
struct rfkill_event *event = (void *) buf;
const char *name;
ssize_t len;
int fd;
fd = open("/dev/rfkill", O_RDONLY);
if (fd < 0) {
perror("Can't open RFKILL control device");
return;
}
if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
perror("Can't set RFKILL control device to non-blocking");
close(fd);
}
while (1) {
len = read(fd, buf, sizeof(buf));
if (len < 0) {
if (errno == EAGAIN)
break;
perror("Reading of RFKILL events failed");
break;
}
if (len != sizeof(struct rfkill_event)) {
fprintf(stderr, "Wrong size of RFKILL event\n");
continue;
}
if (event->op != RFKILL_OP_ADD)
continue;
name = get_name(event->idx);
printf("%u: %s: %s\n", event->idx, name,
type2string(event->type));
printf("\tSoft blocked: %s\n", event->soft ? "yes" : "no");
printf("\tHard blocked: %s\n", event->hard ? "yes" : "no");
}
close(fd);
}
static void rfkill_block(__u32 idx, __u8 block)
{
struct rfkill_event event;
ssize_t len;
int fd;
fd = open("/dev/rfkill", O_RDWR);
if (fd < 0) {
perror("Can't open RFKILL control device");
return;
}
memset(&event, 0, sizeof(event));
event.idx = idx;
event.op = RFKILL_OP_CHANGE;
event.soft = block;
len = write(fd, &event, sizeof(event));
if (len < 0)
perror("Failed to change RFKILL state");
close(fd);
}
static const char *argv0;
static void usage(void)
{
fprintf(stderr, "Usage:\t%s [options] command\n", argv0);
fprintf(stderr, "Options:\n");
fprintf(stderr, "\t--version\tshow version (%s)\n", rfkill_version);
fprintf(stderr, "Commands:\n");
fprintf(stderr, "\thelp\n");
fprintf(stderr, "\tevent\n");
fprintf(stderr, "\tlist\n");
fprintf(stderr, "\tblock <idx>\n");
fprintf(stderr, "\tunblock <idx>\n");
}
static void version(void)
{
printf("rfkill %s\n", rfkill_version);
}
int main(int argc, char **argv)
{
/* strip off self */
argc--;
argv0 = *argv++;
if (argc > 0 && strcmp(*argv, "--version") == 0) {
version();
return 0;
}
if (argc == 0 || strcmp(*argv, "help") == 0) {
usage();
return 0;
}
if (strcmp(*argv, "event") == 0) {
rfkill_event();
} else if (strcmp(*argv, "list") == 0) {
rfkill_list();
} else if (strcmp(*argv, "block") == 0 && argc > 1) {
argc--;
argv++;
__u32 idx = atoi(*argv);
rfkill_block(idx, 1);
} else if (strcmp(*argv, "unblock") == 0 && argc > 1) {
argc--;
argv++;
__u32 idx = atoi(*argv);
rfkill_block(idx, 0);
} else {
usage();
return 1;
}
return 0;
}