| Revision | 36c6e87c8308ac979de7d861bf2f64d26aa1b198 (tree) |
|---|---|
| Time | 2011-07-12 16:06:24 |
| Author | Chih-Wei Huang <cwhuang@linu...> |
| Commiter | Chih-Wei Huang |
add powerbtnd to simulate long press of power button.
On x86 PC, power button usually generates key press and release events
simultaneously. However, the android framework expects a long press
of power button to invoke the power off dialog.
The daemon simulates a long press of power button in 2 seconds.
A target needs to add excluded-input-devices.xml to exclude
'Power Button' from processing by EventHub.
Android.mk (diff)
power/powerbtnd.c (diff)| @@ -40,3 +40,14 @@ LOCAL_MODULE:= libpower | ||
| 40 | 40 | LOCAL_SRC_FILES += power/power.c |
| 41 | 41 | |
| 42 | 42 | include $(BUILD_STATIC_LIBRARY) |
| 43 | + | |
| 44 | +# powerbtn executable | |
| 45 | +include $(CLEAR_VARS) | |
| 46 | + | |
| 47 | +LOCAL_SRC_FILES := power/powerbtnd.c | |
| 48 | + | |
| 49 | +LOCAL_MODULE := powerbtnd | |
| 50 | +LOCAL_MODULE_TAGS := optional | |
| 51 | +LOCAL_SHARED_LIBRARIES := liblog | |
| 52 | + | |
| 53 | +include $(BUILD_EXECUTABLE) |
| @@ -0,0 +1,118 @@ | ||
| 1 | +/** | |
| 2 | + * A daemon to simulate power button of Android | |
| 3 | + * | |
| 4 | + * Copyright (C) 2011 The Android-x86 Open Source Project | |
| 5 | + * | |
| 6 | + * by Chih-Wei Huang <cwhuang@linux.org.tw> | |
| 7 | + * | |
| 8 | + * Licensed under GPLv2 or later | |
| 9 | + * | |
| 10 | + **/ | |
| 11 | + | |
| 12 | +#define LOG_TAG "powerbtn" | |
| 13 | + | |
| 14 | +#include <sys/stat.h> | |
| 15 | +#include <poll.h> | |
| 16 | +#include <fcntl.h> | |
| 17 | +#include <errno.h> | |
| 18 | +#include <dirent.h> | |
| 19 | +#include <cutils/log.h> | |
| 20 | +#include <linux/input.h> | |
| 21 | +#include <linux/uinput.h> | |
| 22 | + | |
| 23 | +const int MAX_POWERBTNS = 3; | |
| 24 | + | |
| 25 | +int openfds(struct pollfd pfds[]) | |
| 26 | +{ | |
| 27 | + int cnt = 0; | |
| 28 | + const char *dirname = "/dev/input"; | |
| 29 | + DIR *dir; | |
| 30 | + if ((dir = opendir(dirname))) { | |
| 31 | + int fd; | |
| 32 | + struct dirent *de; | |
| 33 | + while ((de = readdir(dir))) { | |
| 34 | + if (de->d_name[0] != 'e') // eventX | |
| 35 | + continue; | |
| 36 | + char name[PATH_MAX]; | |
| 37 | + snprintf(name, PATH_MAX, "%s/%s", dirname, de->d_name); | |
| 38 | + fd = open(name, O_RDWR); | |
| 39 | + if (fd < 0) { | |
| 40 | + LOGE("could not open %s, %s", name, strerror(errno)); | |
| 41 | + continue; | |
| 42 | + } | |
| 43 | + name[sizeof(name) - 1] = '\0'; | |
| 44 | + if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) { | |
| 45 | + LOGE("could not get device name for %s, %s\n", name, strerror(errno)); | |
| 46 | + name[0] = '\0'; | |
| 47 | + } | |
| 48 | + | |
| 49 | + // TODO: parse /etc/excluded-input-devices.xml | |
| 50 | + if (!strcmp(name, "Power Button")) { | |
| 51 | + LOGI("open %s(%s) ok", de->d_name, name); | |
| 52 | + pfds[cnt].events = POLLIN; | |
| 53 | + pfds[cnt++].fd = fd; | |
| 54 | + if (cnt < MAX_POWERBTNS) | |
| 55 | + continue; | |
| 56 | + else | |
| 57 | + break; | |
| 58 | + } | |
| 59 | + close(fd); | |
| 60 | + } | |
| 61 | + closedir(dir); | |
| 62 | + } | |
| 63 | + | |
| 64 | + return cnt; | |
| 65 | +} | |
| 66 | + | |
| 67 | +int main() | |
| 68 | +{ | |
| 69 | + struct pollfd pfds[MAX_POWERBTNS]; | |
| 70 | + int cnt = openfds(pfds); | |
| 71 | + int pollres; | |
| 72 | + | |
| 73 | + int ufd = open("/dev/uinput", O_WRONLY | O_NDELAY); | |
| 74 | + if (ufd >= 0) { | |
| 75 | + struct uinput_user_dev ud; | |
| 76 | + memset(&ud, 0, sizeof(ud)); | |
| 77 | + strcpy(ud.name, "Android Power Button"); | |
| 78 | + write(ufd, &ud, sizeof(ud)); | |
| 79 | + ioctl(ufd, UI_SET_EVBIT, EV_KEY); | |
| 80 | + ioctl(ufd, UI_SET_KEYBIT, KEY_POWER); | |
| 81 | + ioctl(ufd, UI_DEV_CREATE, 0); | |
| 82 | + } else { | |
| 83 | + LOGE("could not open uinput device: %s", strerror(errno)); | |
| 84 | + return -1; | |
| 85 | + } | |
| 86 | + | |
| 87 | + while ((pollres = poll(pfds, cnt, -1))) { | |
| 88 | + int i; | |
| 89 | + if (pollres < 0) { | |
| 90 | + LOGE("poll error: %s", strerror(errno)); | |
| 91 | + break; | |
| 92 | + } | |
| 93 | + for (i = 0; i < cnt; ++i) { | |
| 94 | + if (pfds[i].revents & POLLIN) { | |
| 95 | + struct input_event iev; | |
| 96 | + size_t res = read(pfds[i].fd, &iev, sizeof(iev)); | |
| 97 | + if (res < sizeof(iev)) { | |
| 98 | + LOGW("insufficient input data(%d)? fd=%d", res, pfds[i].fd); | |
| 99 | + continue; | |
| 100 | + } | |
| 101 | + LOGV("type=%d scancode=%d value=%d from fd=%d", iev.type, iev.code, iev.value, pfds[i].fd); | |
| 102 | + if (iev.type == EV_KEY) { | |
| 103 | + switch (iev.code) | |
| 104 | + { | |
| 105 | + case KEY_POWER: | |
| 106 | + if (!iev.value) | |
| 107 | + sleep(2); | |
| 108 | + break; | |
| 109 | + } | |
| 110 | + } | |
| 111 | + | |
| 112 | + write(ufd, &iev, sizeof(iev)); | |
| 113 | + } | |
| 114 | + } | |
| 115 | + } | |
| 116 | + | |
| 117 | + return 0; | |
| 118 | +} |
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