alema/btor
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works kinda

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This commit is contained in:
Alessandro Mauri 2022-02-16 17:58:17 +01:00
parent dc1bf3a4b3
commit e02bde2201
2 changed files with 9 additions and 16 deletions
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2
Makefile
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@ -1,7 +1,7 @@
.POSIX: .POSIX:
CC = gcc CC = gcc
CFLAGS = -Wall -Werror -Wextra -pedantic -std=c11 CFLAGS = -Wall -Werror -Wextra -pedantic -std=c11 -O2
btor: btor.c btor: btor.c
${CC} ${LDFLAGS} ${CFLAGS} btor.c -o btor ${CC} ${LDFLAGS} ${CFLAGS} btor.c -o btor

23
btor.c
View File

@ -38,7 +38,8 @@ int main(int argc, char **argv)
if ((st.st_mode & S_IFMT) != S_IFCHR) if ((st.st_mode & S_IFMT) != S_IFCHR)
continue; continue;
int tmp_fd = openat(dirfd(dir), dp->d_name, O_RDWR | O_NONBLOCK); // blocking io
int tmp_fd = openat(dirfd(dir), dp->d_name, O_RDWR);
if (tmp_fd < 0) if (tmp_fd < 0)
err(1, "openat:"); err(1, "openat:");
union { union {
@ -47,12 +48,12 @@ int main(int argc, char **argv)
} vec; } vec;
if (ioctl(tmp_fd, EVIOCGBIT(0, EV_MAX), vec.b) < 0) if (ioctl(tmp_fd, EVIOCGBIT(0, EV_MAX), vec.b) < 0)
err(1, "ioctl:"); err(1, "ioctl:");
if (!test_bit(EV_KEY, vec.b)) if (!test_bit(EV_KEY, vec.b) || !test_bit(EV_ABS, vec.b))
continue; continue;
if (ioctl(tmp_fd, EVIOCGBIT(EV_KEY, KEY_MAX), vec.k) < 0) if (ioctl(tmp_fd, EVIOCGBIT(EV_KEY, KEY_MAX), vec.k) < 0)
err(1, "ioctl:"); err(1, "ioctl:");
if (test_bit(BTN_STYLUS, vec.k) && test_bit(EV_ABS, vec.k)) { if (test_bit(BTN_STYLUS, vec.k) && test_bit(BTN_TOOL_RUBBER, vec.k)) {
stylus = tmp_fd; stylus = tmp_fd;
break; break;
} }
@ -65,28 +66,20 @@ int main(int argc, char **argv)
int poll_set = epoll_create(1); int poll_set = epoll_create(1);
if (poll_set < 0) if (poll_set < 0)
err(1, "epoll_create:"); err(1, "epoll_create:");
struct epoll_event poll_ev = { .events = EPOLLIN | EPOLLOUT | EPOLLET }; struct epoll_event poll_ev = { .events = EPOLLIN };
if (epoll_ctl(poll_set, EPOLL_CTL_ADD, stylus, &poll_ev) < 0) if (epoll_ctl(poll_set, EPOLL_CTL_ADD, stylus, &poll_ev) < 0)
err(1, "epoll_ctl:"); err(1, "epoll_ctl:");
unsigned char button_recived = 0;
struct input_event in_ev, out_ev; struct input_event in_ev, out_ev;
while (epoll_wait(poll_set, &poll_ev, 1, -1) != -1) { while (epoll_wait(poll_set, &poll_ev, 1, -1) != -1) {
switch (poll_ev.events) { switch (poll_ev.events) {
case EPOLLIN: case EPOLLIN:
if (read(stylus, &in_ev, sizeof(struct input_event)) < 0) if (read(stylus, &in_ev, sizeof(struct input_event)) < 0)
err(1, "read:"); err(1, "read:");
if (in_ev.type != BTN_STYLUS) if (in_ev.code != BTN_STYLUS)
break; break;
out_ev.type = BTN_TOOL_RUBBER; out_ev = in_ev;
out_ev.value = in_ev.value; out_ev.code = BTN_TOOL_RUBBER;
button_recived = 1;
break;
case EPOLLOUT:
if (!button_recived)
break;
button_recived = 0;
if (write(stylus, &out_ev, sizeof(struct input_event)) < 0) if (write(stylus, &out_ev, sizeof(struct input_event)) < 0)
err(1, "write:"); err(1, "write:");
break; break;