chiark / gitweb /
libudev: add monitor documentation
[elogind.git] / udev / lib / test-libudev.c
index e86c660..3c38600 100644 (file)
 
 #include <stdio.h>
 #include <stdarg.h>
 
 #include <stdio.h>
 #include <stdarg.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/select.h>
+
 #include "libudev.h"
 
 static void log_fn(struct udev *udev,
 #include "libudev.h"
 
 static void log_fn(struct udev *udev,
@@ -31,9 +36,49 @@ static void log_fn(struct udev *udev,
        vprintf(format, args);
 }
 
        vprintf(format, args);
 }
 
-static int devlinks_cb(struct udev_device *udev_device, const char *value, void *data)
+static int print_devlinks_cb(struct udev_device *udev_device, const char *value, void *data)
 {
 {
-       printf("link: %s\n", value);
+       printf("link:      '%s'\n", value);
+       return 0;
+}
+
+static int print_properties_cb(struct udev_device *udev_device, const char *key, const char *value, void *data)
+{
+       printf("property:  '%s=%s'\n", key, value);
+       return 0;
+}
+
+static void print_device(struct udev_device *device)
+{
+       const char *str;
+       int count;
+
+       printf("*** device: %p ***\n", device);
+       str = udev_device_get_devpath(device);
+       printf("devpath:   '%s'\n", str);
+       str = udev_device_get_subsystem(device);
+       printf("subsystem: '%s'\n", str);
+       str = udev_device_get_devname(device);
+       printf("devname:   '%s'\n", str);
+       count = udev_device_get_devlinks(device, print_devlinks_cb, NULL);
+       printf("found %i links\n", count);
+       count = udev_device_get_properties(device, print_properties_cb, NULL);
+       printf("found %i properties\n", count);
+       printf("\n");
+}
+
+static int test_device(struct udev *udev, const char *devpath)
+{
+       struct udev_device *device;
+
+       printf("looking at device: %s\n", devpath);
+       device = udev_device_new_from_devpath(udev, devpath);
+       if (device == NULL) {
+               printf("no device\n");
+               return -1;
+       }
+       print_device(device);
+       udev_device_unref(device);
        return 0;
 }
 
        return 0;
 }
 
@@ -41,28 +86,79 @@ static int devices_enum_cb(struct udev *udev,
                           const char *devpath, const char *subsystem, const char *name,
                           void *data)
 {
                           const char *devpath, const char *subsystem, const char *name,
                           void *data)
 {
-       printf("device: %s (%s) %s\n", devpath, subsystem, name);
+       printf("device:    '%s' (%s) '%s'\n", devpath, subsystem, name);
        return 0;
 }
 
        return 0;
 }
 
-static int properties_cb(struct udev_device *udev_device, const char *key, const char *value, void *data)
+static int test_enumerate(struct udev *udev, const char *subsystem)
 {
 {
-       printf("property: %s=%s\n", key, value);
+       int count;
+
+       count = udev_devices_enumerate(udev, subsystem, devices_enum_cb, NULL);
+       printf("found %i devices\n\n", count);
+       return count;
+}
+
+static int test_monitor(struct udev *udev, const char *socket_path)
+{
+       struct udev_monitor *udev_monitor;
+       fd_set readfds;
+       int fd;
+
+       udev_monitor = udev_monitor_new_from_socket(udev, socket_path);
+       if (udev_monitor == NULL) {
+               printf("no socket\n");
+               return -1;
+       }
+
+       fd = udev_monitor_get_fd(udev_monitor);
+       FD_ZERO(&readfds);
+
+       while (1) {
+               struct udev_device *device;
+               int fdcount;
+
+               FD_SET(STDIN_FILENO, &readfds);
+               FD_SET(fd, &readfds);
+
+               printf("waiting for events on %s, press ENTER to exit\n", socket_path);
+               fdcount = select(fd+1, &readfds, NULL, NULL, NULL);
+               printf("select fd count: %i\n", fdcount);
+
+               if (FD_ISSET(fd, &readfds)) {
+                       device = udev_monitor_get_device(udev_monitor);
+                       if (device == NULL) {
+                               printf("no device from socket\n");
+                               continue;
+                       }
+                       print_device(device);
+                       udev_device_unref(device);
+               }
+
+               if (FD_ISSET(STDIN_FILENO, &readfds)) {
+                       printf("exiting loop\n");
+                       break;
+               }
+       }
+
+       udev_monitor_unref(udev_monitor);
        return 0;
 }
 
 int main(int argc, char *argv[], char *envp[])
 {
        struct udev *udev;
        return 0;
 }
 
 int main(int argc, char *argv[], char *envp[])
 {
        struct udev *udev;
-       struct udev_device *device;
-       const char *str;
        const char *devpath = "/devices/virtual/mem/null";
        const char *subsystem = NULL;
        const char *devpath = "/devices/virtual/mem/null";
        const char *subsystem = NULL;
+       const char *socket = "@/org/kernel/udev/monitor";
+       const char *str;
 
        if (argv[1] != NULL) {
                devpath = argv[1];
                if (argv[2] != NULL)
                        subsystem = argv[2];
 
        if (argv[1] != NULL) {
                devpath = argv[1];
                if (argv[2] != NULL)
                        subsystem = argv[2];
+                       if (argv[3] != NULL)
+                               socket = argv[3];
        }
 
        udev = udev_new();
        }
 
        udev = udev_new();
@@ -75,32 +171,13 @@ int main(int argc, char *argv[], char *envp[])
        printf("set log: %p\n", log_fn);
 
        str = udev_get_sys_path(udev);
        printf("set log: %p\n", log_fn);
 
        str = udev_get_sys_path(udev);
-       printf("sys_path: %s\n", str);
+       printf("sys_path: '%s'\n", str);
        str = udev_get_dev_path(udev);
        str = udev_get_dev_path(udev);
-       printf("dev_path: %s\n", str);
-
-       printf("looking at device: %s\n", devpath);
-       device = udev_device_new_from_devpath(udev, devpath);
-       printf("device: %p\n", device);
-       if (device == NULL) {
-               printf("no device\n");
-               return 1;
-       }
-       str = udev_device_get_devpath(device);
-       printf("devpath: %s\n", str);
-       str = udev_device_get_subsystem(device);
-       printf("subsystem: %s\n", str);
-       str = udev_device_get_devname(device);
-       printf("devname: %s\n", str);
-       udev_device_get_devlinks(device, devlinks_cb, NULL);
-       udev_device_get_properties(device, properties_cb, NULL);
-       udev_device_unref(device);
+       printf("dev_path: '%s'\n", str);
 
 
-       if (subsystem == NULL)
-               printf("enumerating devices from all subsystems\n");
-       else
-               printf("enumerating devices from subsystem: %s\n", subsystem);
-       udev_devices_enumerate(udev, subsystem, devices_enum_cb, NULL);
+       test_device(udev, devpath);
+       test_enumerate(udev, subsystem);
+       test_monitor(udev, socket);
 
        udev_unref(udev);
        return 0;
 
        udev_unref(udev);
        return 0;