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/* See LICENSE file for copyright and license details. */
#include "common.h"
int
libgamepad_get_attachment_event(LIBGAMEPAD_ATTACHMENT_MONITOR *monitor, char **syspathp, size_t *sizep,
enum libgamepad_attachment_event_type *typep)
{
struct udev_device *device;
const char *action;
const char *syspath;
size_t len;
void *new;
char *syspath_end;
int saved_errno;
device = udev_monitor_receive_device(monitor->monitor);
if (!device)
return -1;
action = udev_device_get_action(device);
if (!strcmp(action, "bind"))
*typep = LIBGAMEPAD_ADDED;
else if (!strcmp(action, "unbind"))
*typep = LIBGAMEPAD_REMOVED;
else
goto suppress;
syspath = udev_device_get_syspath(device);
if (!syspath || !*syspath)
goto suppress;
len = strlen(syspath) + sizeof("/hidraw");
if (len > *sizep) {
new = realloc(*syspathp, len);
if (!new) {
udev_device_unref(device);
return -1;
}
*syspathp = new;
*sizep = len;
}
syspath_end = stpcpy(*syspathp, syspath);
if (*typep == LIBGAMEPAD_ADDED) {
stpcpy(syspath_end, "/hidraw");
saved_errno = errno;
if (access(*syspathp, F_OK)) {
errno = saved_errno;
goto suppress;
}
*syspath_end = '\0';
}
udev_device_unref(device);
return 1;
suppress:
udev_device_unref(device);
return 0;
}
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