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ltunify: automatically detect hidraw device

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This commit is contained in:
Peter Wu
2013-04-08 18:10:25 +02:00
parent 30f8961be0
commit 515235530e
1 changed files with 59 additions and 12 deletions
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71
ltunify.c
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@@ -28,6 +28,7 @@
#include <stdlib.h> /* strtoul */
#include <stdint.h> /* uint16_t */
#include <arpa/inet.h> /* ntohs, ntohl */
#include <glob.h> /* for /dev/hidrawX discovery */
// Set DEBUG envvar to enable printing extra verbose details
static bool debug_enabled;
@@ -834,7 +835,7 @@ static void install_sighandlers(void) {
// end signal functions
static void print_usage(const char *program_name) {
fprintf(stderr, "Usage: %s /dev/hidrawX cmd [cmd options]\n"
fprintf(stderr, "Usage: %s cmd [cmd options]\n"
"Logitech Unifying tool\n"
"Copyright (C) 2013 Peter Wu <lekensteyn@gmail.com>\n"
"\n"
@@ -852,11 +853,11 @@ static void print_usage(const char *program_name) {
static bool validate_args(int argc, char **argv) {
char *cmd;
if (argc < 3) {
if (argc < 2) {
return false;
}
cmd = argv[2];
cmd = argv[1];
if (!strcmp(cmd, "list")) {
return true;
} else if (!strcmp(cmd, "pair")) {
@@ -864,10 +865,10 @@ static bool validate_args(int argc, char **argv) {
return true;
} else if (!strcmp(cmd, "unpair") || !strcmp(cmd, "info")) {
u8 device_index;
if (argc < 4) {
if (argc < 3) {
return false;
}
device_index = (u8) strtoul(argv[3], NULL, 0);
device_index = (u8) strtoul(argv[2], NULL, 0);
if (device_index < 1 || device_index > DEVICES_MAX) {
fprintf(stderr, "Device index must be between 1 and 6.\n");
return false;
@@ -879,6 +880,53 @@ static bool validate_args(int argc, char **argv) {
return false;
}
#define RECEIVER_NAME "logitech-djreceiver"
int open_hidraw(void) {
int fd = -1;
glob_t matches;
char *hiddev_name = NULL;
if (!glob("/sys/class/hidraw/hidraw*/device/driver", 0, NULL, &matches)) {
size_t i;
char buf[1024];
for (i = 0; i < matches.gl_pathc; i++) {
ssize_t r;
char *name = matches.gl_pathv[i];
r = readlink(name, buf, sizeof buf);
if (r < 0) {
perror(name);
} else if ((size_t) r >= sizeof RECEIVER_NAME &&
!memcmp(buf + r - sizeof RECEIVER_NAME + 1, RECEIVER_NAME, sizeof RECEIVER_NAME - 1)) {
hiddev_name = name + sizeof "/sys/class/hidraw" - sizeof "/dev";
memcpy(hiddev_name, "/dev", sizeof "/dev" - 1);
name[strlen(name) - sizeof "/device/driver" + 1] = '\0';
fd = open(hiddev_name, O_RDWR);
if (fd < 0) {
perror(hiddev_name);
} else {
break;
}
}
}
}
if (fd < 0) {
if (hiddev_name) {
fprintf(stderr, "Logitech Unifying Receiver device is not accessible.\n"
"Try running this program as root or enable read/write permissions\n"
"for %s\n", hiddev_name);
} else {
fprintf(stderr, "No Logitech Unifying Receiver device found\n");
}
}
globfree(&matches);
return fd;
}
int main(int argc, char **argv) {
int fd;
struct msg_enable_notifs notifs;
@@ -890,11 +938,10 @@ int main(int argc, char **argv) {
print_usage(*argv);
return 1;
}
cmd = argv[2];
cmd = argv[1];
fd = open(argv[1], O_RDWR);
fd = open_hidraw();
if (fd < 0) {
perror(argv[1]);
return 1;
}
@@ -922,13 +969,13 @@ int main(int argc, char **argv) {
if (!strcmp(cmd, "pair")) {
u8 timeout = 0;
if (argc >= 4) {
timeout = (u8) strtoul(argv[3], NULL, 0);
if (argc >= 3) {
timeout = (u8) strtoul(argv[2], NULL, 0);
}
perform_pair(fd, timeout);
} else if (!strcmp(cmd, "unpair")) {
u8 device_index;
device_index = (u8) strtoul(argv[3], NULL, 0);
device_index = (u8) strtoul(argv[2], NULL, 0);
if (!get_all_devices(fd)) {
fprintf(stderr, "Unable to request a list of paired devices\n");
}
@@ -952,7 +999,7 @@ int main(int argc, char **argv) {
get_and_print_recv_fw(fd);
device_index = (u8) strtoul(argv[3], NULL, 0);
device_index = (u8) strtoul(argv[2], NULL, 0);
gather_device_info(fd, device_index);
print_detailed_device(device_index);
} else {