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72 lines
1.9 KiB
72 lines
1.9 KiB
--- a/src/libudev.c
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+++ b/src/libudev.c
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@@ -26,6 +26,7 @@ struct udev_device {
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struct udev *udev;
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int refcount;
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char syspath[32];
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+ char sysfspath[64];
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dev_t devnum;
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char const *sysname;
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char const *action;
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@@ -115,6 +116,29 @@ udev_device_new_from_devnum(struct udev
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return NULL;
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}
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+struct udev_device *
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+udev_device_new_from_subsystem_sysname(
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+ struct udev *udev, const char *subsystem, const char *sysname)
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+{
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+ struct udev_device *u;
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+ char sysfsname[64];
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+ struct stat st;
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+
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+ snprintf(sysfsname, sizeof(sysfsname), "/sys/bus/%s/devices/%s/", subsystem, sysname);
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+ if (stat(sysfsname, &st) == 0)
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+ {
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+ char sysfsdev[64];
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+ u = calloc(1, sizeof(struct udev_device));
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+ strncpy(u->sysfspath, sysfsname, sizeof(u->sysfspath));
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+
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+ return u;
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+ }
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+ else
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+ {
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+ return NULL;
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+ }
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+}
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+
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char const *
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udev_device_get_devnode(struct udev_device *udev_device)
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{
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@@ -132,6 +156,20 @@ udev_device_get_devnum(struct udev_devic
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char const *
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udev_device_get_driver(struct udev_device *udev_device)
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{
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+ if (udev_device->sysfspath)
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+ {
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+ char driverlnp[64];
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+ char driverlnk[32];
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+ snprintf(driverlnp, sizeof(driverlnp), "%s/driver",
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+ udev_device->sysfspath);
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+ if (readlink(driverlnp, driverlnk, sizeof(driver)))
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+ {
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+ char *drivernm;
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+ drivernm = strrchr(driverlnk, '/');
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+ if (drivernm)
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+ return ++drivernm;
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+ }
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+ }
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return NULL;
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}
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--- a/src/libudev.h
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+++ b/src/libudev.h
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@@ -30,6 +30,8 @@ struct udev_device *udev_device_new_from
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struct udev *udev, char const *syspath);
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struct udev_device *udev_device_new_from_devnum(
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struct udev *udev, char type, dev_t devnum);
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+struct udev_device *udev_device_new_from_subsystem_sysname(
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+ struct udev *udev, const char *subsystem, const char *sysname);
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char const *udev_device_get_driver(struct udev_device *udev_device);
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char const *udev_device_get_syspath(struct udev_device *udev_device);
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char const *udev_device_get_sysname(struct udev_device *udev_device);
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