diff options
| -rw-r--r-- | Makefile | 1 | ||||
| -rw-r--r-- | autorotate.c | 163 |
2 files changed, 164 insertions, 0 deletions
diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..abb7686 --- /dev/null +++ b/Makefile @@ -0,0 +1 @@ +autorotate: autorotate.c diff --git a/autorotate.c b/autorotate.c new file mode 100644 index 0000000..7cdfddf --- /dev/null +++ b/autorotate.c @@ -0,0 +1,163 @@ +#define _XOPEN_SOURCE 700 +#include <sys/select.h> +#include <sys/socket.h> +#include <sys/un.h> +#include <unistd.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> + +#define ACPID_SOCK_PATH "/var/run/acpid.socket" + +/* once to go into tablet mode, twice to come out */ +#define ACPI_ROTATE "ibm/hotkey LEN0068:00 00000080 000060c0\n" + +/* once on keydown, once on keyup */ +#define ACPI_ROTATELOCK "ibm/hotkey LEN0068:00 00000080 00006020\n" + +#define FIXME_HARDCODED_DEV_NUMBER 4 + +#define GRAVITY_CUTOFF (7.0) +#define DEV_PATH "/sys/bus/iio/devices/iio:device%d" +#define SCALE_FILE "in_accel_scale" +#define X_RAW_FILE "in_accel_x_raw" +#define Y_RAW_FILE "in_accel_y_raw" + +int tabletmode = 0; +int rotatelock = 0; +enum { NORMAL, LEFT, INVERTED, RIGHT } rotation = NORMAL; + +int openacpi(const char *path) +{ + struct sockaddr_un sun = {0}; + int sock = socket(AF_UNIX, SOCK_STREAM, 0); + if (sock == -1) { + return -1; + } + + sun.sun_family = AF_UNIX; + strcpy(sun.sun_path, path ? path : ACPID_SOCK_PATH); + if (connect(sock, (const struct sockaddr*)&sun, sizeof(sun)) == -1) { + close(sock); + return -1; + } + + return sock; +} + +void checkacpi(int acpi) +{ + static int nrotate = 0; + static int nlock = 0; + + char buf[BUFSIZ]; + ssize_t n = read(acpi, buf, sizeof(buf)); + if (n <= 0) { + return; + } + + if (!strcmp(buf, ACPI_ROTATE)) { + nrotate++; + if (nrotate == 1) { + printf("Entering tablet mode\n"); + tabletmode = 1; + } else if (nrotate == 3) { + printf("Leaving tablet mode\n"); + tabletmode = 0; + nrotate = 0; + } + } else if (!strcmp(buf, ACPI_ROTATELOCK)) { + nlock++; + if (nlock == 2) { + nlock = 0; + rotatelock = ! rotatelock; + printf("Set rotate lock to %d\n", rotatelock); + } + } +} + +FILE *opendevfile(const char *file) +{ + static char devdir[sizeof(DEV_PATH) + 5] = { '\0' }; + char *path = NULL; + if (devdir[0] == '\0') { + sprintf(devdir, DEV_PATH, FIXME_HARDCODED_DEV_NUMBER); + } + path = malloc(strlen(devdir) + strlen(file) + 4); + sprintf(path, "%s/%s", devdir, file); + FILE *dev = fopen(path, "r"); + free(path); + return dev; +} + + +double getgravity(double cutoff) +{ + FILE *scale = opendevfile(SCALE_FILE); + + if (scale == NULL) { + return cutoff; + } + + double scalefactor; + fscanf(scale, "%lf", &scalefactor); + fclose(scale); + + return cutoff / scalefactor; +} + +double getraw(const char *file) +{ + double value = 0.0; + FILE *raw = opendevfile(file); + if (raw) { + fscanf(raw, "%lg", &value); + fclose(raw); + } + return value; +} + +int main(void) +{ + double gravity = getgravity(GRAVITY_CUTOFF); + + printf("Grativational cutoff is %lf\n", gravity); + int acpi = openacpi(NULL); + if (acpi == -1) { + tabletmode = 1; + rotatelock = 0; + rotation = NORMAL; + } + + for (;;) { + int nfds = 0; + fd_set fds = acpi + 1; + FD_ZERO(&fds); + struct timeval to = {0}; + to.tv_usec = 5000; + int forever = 0; + + if (acpi != -1) { + FD_SET(acpi, &fds); + if (tabletmode == 0 || rotatelock == 1) { + forever = 1; + } + } + + select(nfds, &fds, NULL, NULL, forever ? NULL : &to); + + if (acpi != -1 && FD_ISSET(acpi, &fds)) { + checkacpi(acpi); + } + + if (tabletmode == 1 && rotatelock == 0) { + double x = getraw(X_RAW_FILE); + double y = getraw(Y_RAW_FILE); + printf("X: %lg; Y: %lg\n", x, y); + } else { + printf("Not rotating because tabletmode is %d and rotatelock is %d\n", tabletmode, rotatelock); + } + } + + return 1; +} |