machine: make sure unpriviliged "machinectl status" can show the machine's OS version

[elogind.git] / src / udev / accelerometer / accelerometer.c

diff --git a/src/udev/accelerometer/accelerometer.c b/src/udev/accelerometer/accelerometer.c
index 21f51936eebbb6c13c071ff49ee1763331f69753..32adf277777dcdb38a54295fdcc4a55afb1de12f 100644 (file)
--- a/src/udev/accelerometer/accelerometer.c
+++ b/src/udev/accelerometer/accelerometer.c
@@ -46,6 +46,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <stdbool.h>
 #include <math.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -70,6 +71,7 @@
 
 static int debug = 0;
 
+_printf_(6,0)
 static void log_fn(struct udev *udev, int priority,
                    const char *file, int line, const char *fn,
                    const char *format, va_list args)
@@ -122,7 +124,7 @@ string_to_orientation (const char *orientation)
         if (orientation == NULL)
                 return ORIENTATION_UNDEFINED;
         for (i = 0; orientations[i] != NULL; i++) {
-                if (strcmp (orientation, orientations[i]) == 0)
+                if (streq (orientation, orientations[i]))
                         return i;
         }
         return ORIENTATION_UNDEFINED;
@@ -178,7 +180,7 @@ get_prev_orientation(struct udev_device *dev)
         return string_to_orientation(value);
 }
 
-#define SET_AXIS(axis, code_) if (ev[i].code == code_) { if (got_##axis == 0) { axis = ev[i].value; got_##axis = 1; } }
+#define READ_AXIS(axis, var) { memzero(&abs_info, sizeof(abs_info)); r = ioctl(fd, EVIOCGABS(axis), &abs_info); if (r < 0) return; var = abs_info.value; }
 
 /* accelerometers */
 static void test_orientation(struct udev *udev,
@@ -186,54 +188,25 @@ static void test_orientation(struct udev *udev,
                              const char *devpath)
 {
         OrientationUp old, new;
-        int fd, r;
-        struct input_event ev[64];
-        int got_syn = 0;
-        int got_x, got_y, got_z;
+        _cleanup_close_ int fd = -1;
+        struct input_absinfo abs_info;
         int x = 0, y = 0, z = 0;
+        int r;
         char text[64];
 
         old = get_prev_orientation(dev);
 
-        if ((fd = open(devpath, O_RDONLY)) < 0)
+        fd = open(devpath, O_RDONLY|O_CLOEXEC);
+        if (fd < 0)
                 return;
 
-        got_x = got_y = got_z = 0;
-
-        while (1) {
-                int i;
-
-                r = read(fd, ev, sizeof(struct input_event) * 64);
-
-                if (r < (int) sizeof(struct input_event)) {
-                        close(fd);
-                        return;
-                }
-
-                for (i = 0; i < r / (int) sizeof(struct input_event); i++) {
-                        if (got_syn == 1) {
-                                if (ev[i].type == EV_ABS) {
-                                        SET_AXIS(x, ABS_X);
-                                        SET_AXIS(y, ABS_Y);
-                                        SET_AXIS(z, ABS_Z);
-                                }
-                        }
-                        if (ev[i].type == EV_SYN && ev[i].code == SYN_REPORT) {
-                                got_syn = 1;
-                        }
-                        if (got_x && got_y && got_z)
-                                goto read_dev;
-                }
-        }
-
-read_dev:
-        close(fd);
-
-        if (!got_x || !got_y || !got_z)
-                return;
+        READ_AXIS(ABS_X, x);
+        READ_AXIS(ABS_Y, y);
+        READ_AXIS(ABS_Z, z);
 
         new = orientation_calc(old, x, y, z);
-        snprintf(text, sizeof(text), "ID_INPUT_ACCELEROMETER_ORIENTATION=%s", orientation_to_string(new));
+        snprintf(text, sizeof(text),
+                 "ID_INPUT_ACCELEROMETER_ORIENTATION=%s", orientation_to_string(new));
         puts(text);
 }
 
@@ -257,7 +230,6 @@ int main (int argc, char** argv)
 
         char devpath[PATH_MAX];
         char *devnode;
-        const char *id_path;
         struct udev_enumerate *enumerate;
         struct udev_list_entry *list_entry;
 
@@ -303,18 +275,10 @@ int main (int argc, char** argv)
                 return 1;
         }
 
-        id_path = udev_device_get_property_value(dev, "ID_PATH");
-        if (id_path == NULL) {
-                fprintf (stderr, "unable to get property ID_PATH for '%s'", devpath);
-                return 0;
-        }
-
         /* Get the children devices and find the devnode */
-        /* FIXME: use udev_enumerate_add_match_parent() instead */
         devnode = NULL;
         enumerate = udev_enumerate_new(udev);
-        udev_enumerate_add_match_property(enumerate, "ID_PATH", id_path);
-        udev_enumerate_add_match_subsystem(enumerate, "input");
+        udev_enumerate_add_match_parent(enumerate, dev);
         udev_enumerate_scan_devices(enumerate);
         udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
                 struct udev_device *device;
@@ -350,7 +314,7 @@ int main (int argc, char** argv)
                 return 0;
         }
 
-        log_debug("opening accelerometer device %s\n", devnode);
+        log_debug("opening accelerometer device %s", devnode);
         test_orientation(udev, dev, devnode);
         free(devnode);
         log_close();