#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
+#include <sys/stat.h>
#include "udev.h"
#include "udev_version.h"
#include "namedev.h"
+#include "udevdb.h"
#include "libsysfs/libsysfs.h"
-
-static char sysfs_path[SYSFS_PATH_MAX];
-
/*
* Right now the major/minor of a device is stored in a file called
* "dev" in sysfs.
* The number is stored as:
- * MMmm
+ * MM:mm
* MM is the major
* mm is the minor
- * The value is in hex.
- * Yes, this will probably change when we go to a bigger major/minor
- * range, and will have to be changed at that time.
+ * The value is in decimal.
*/
-static int get_major_minor(struct sysfs_class_device *class_dev, int *major, int *minor)
+static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
{
int retval = -ENODEV;
dbg("dev = %s", dev);
- if (sscanf(dev, "%u:%u", major, minor) != 2)
+ if (sscanf(dev, "%u:%u", &udev->major, &udev->minor) != 2)
goto exit;
- dbg("found major = %d, minor = %d", *major, *minor);
+ dbg("found major = %d, minor = %d", udev->major, udev->minor);
retval = 0;
exit:
}
/*
- * We also want to add some permissions here, and possibly some symlinks
+ * we possibly want to add some symlinks here
+ * only numeric owner/group id's are supported
*/
-static int create_node(char *name, char type, int major, int minor, int mode)
+static int create_node(struct udevice *dev)
{
- char *argv[7];
- char mode_string[100];
- char type_string[3];
- char major_string[20];
- char minor_string[20];
char filename[255];
int retval = 0;
+ uid_t uid = 0;
+ gid_t gid = 0;
+ dev_t res;
+
+ strncpy(filename, udev_root, sizeof(filename));
+ strncat(filename, dev->name, sizeof(filename));
+
+#ifdef __KLIBC__
+ res = (dev->major << 8) | (dev->minor);
+#else
+ res = makedev(dev->major, dev->minor);
+#endif
+
+ switch (dev->type) {
+ case 'b':
+ dev->mode |= S_IFBLK;
+ break;
+ case 'c':
+ case 'u':
+ dev->mode |= S_IFCHR;
+ break;
+ case 'p':
+ dev->mode |= S_IFIFO;
+ break;
+ default:
+ dbg("unknown node type %c\n", dev->type);
+ return -EINVAL;
+ }
+
+ /* create subdirectories if requested */
+ if (strchr(dev->name, '/')) {
+ char path[255];
+ char *pos;
+ struct stat stats;
+
+ strncpy(path, filename, sizeof(path));
+ pos = strchr(path+1, '/');
+ while (1) {
+ pos = strchr(pos+1, '/');
+ if (pos == NULL)
+ break;
+ *pos = 0x00;
+ if (stat(path, &stats)) {
+ retval = mkdir(path, 0755);
+ if (retval) {
+ dbg("mkdir(%s) failed with error '%s'",
+ path, strerror(errno));
+ return retval;
+ }
+ dbg("created %s", path);
+ }
+ *pos = '/';
+ }
+ }
+
+ dbg("mknod(%s, %#o, %u, %u)", filename, dev->mode, dev->major, dev->minor);
+ retval = mknod(filename, dev->mode, res);
+ if (retval)
+ dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
+ filename, dev->mode, dev->major, dev->minor, strerror(errno));
+
+ if (*dev->owner) {
+ char *endptr;
+ unsigned long id = strtoul(dev->owner, &endptr, 10);
+ if (*endptr == 0x00)
+ uid = (uid_t) id;
+ else
+ dbg("only numeric owner id supported: %s", dev->owner);
+ }
- strncpy(filename, UDEV_ROOT, sizeof(filename));
- strncat(filename, name, sizeof(filename));
-
- snprintf(mode_string, sizeof(mode_string), "--mode=%#o", mode);
- snprintf(type_string, sizeof(type_string), "%c", type);
- snprintf(major_string, sizeof(major_string), "%d", major);
- snprintf(minor_string, sizeof(minor_string), "%d", minor);
-
- argv[0] = MKNOD;
- argv[1] = mode_string;
- argv[2] = filename;
- argv[3] = type_string;
- argv[4] = major_string;
- argv[5] = minor_string;
- argv[6] = NULL;
- dbg ("executing %s %s %s %s %s %s",
- argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
- switch (fork()) {
- case 0:
- /* we are the child, so lets run the program */
- execv (MKNOD, argv);
- exit(0);
- break;
- case (-1):
- dbg ("fork failed.");
- retval = -EFAULT;
- break;
- default:
- break;
+ if (*dev->group) {
+ char *endptr;
+ unsigned long id = strtoul(dev->group, &endptr, 10);
+ if (*endptr == 0x00)
+ gid = (gid_t) id;
+ else
+ dbg("only numeric group id supported: %s", dev->group);
}
+
+ if (uid || gid) {
+ dbg("chown(%s, %u, %u)", filename, uid, gid);
+ retval = chown(filename, uid, gid);
+ if (retval)
+ dbg("chown(%s, %u, %u) failed with error '%s'", filename,
+ uid, gid, strerror(errno));
+ }
+
return retval;
}
-struct sysfs_class_device *get_class_dev(char *device_name)
+static struct sysfs_class_device *get_class_dev(char *device_name)
{
char dev_path[SYSFS_PATH_MAX];
- struct sysfs_class_device *class_dev;
+ struct sysfs_class_device *class_dev = NULL;
strcpy(dev_path, sysfs_path);
strcat(dev_path, device_name);
class_dev = sysfs_open_class_device(dev_path);
if (class_dev == NULL) {
dbg ("sysfs_open_class_device failed");
- return NULL;
+ goto exit;
}
dbg("class_dev->name = %s", class_dev->name);
+exit:
return class_dev;
}
-static int udev_init(void)
+/* wait for the "dev" file to show up in the directory in sysfs.
+ * If it doesn't happen in about 10 seconds, give up.
+ */
+#define SECONDS_TO_WAIT_FOR_DEV 10
+static int sleep_for_dev(char *path)
{
+ char filename[SYSFS_PATH_MAX + 6];
+ int loop = SECONDS_TO_WAIT_FOR_DEV;
int retval;
- retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
- dbg("sysfs_path = %s", sysfs_path);
+ strcpy(filename, sysfs_path);
+ strcat(filename, path);
+ strcat(filename, "/dev");
+
+ while (loop--) {
+ struct stat buf;
+
+ dbg("looking for %s", filename);
+ retval = stat(filename, &buf);
+ if (!retval)
+ goto exit;
+
+ /* sleep for a second or two to give the kernel a chance to
+ * create the dev file */
+ sleep(1);
+ }
+ retval = -ENODEV;
+exit:
return retval;
}
-int udev_add_device(char *device, char *subsystem)
+int udev_add_device(char *path, char *subsystem)
{
- struct sysfs_class_device *class_dev;
- struct device_attr attr;
- //char *name;
- int major;
- int minor;
- char type;
- //int mode;
+ struct sysfs_class_device *class_dev = NULL;
+ struct udevice dev;
int retval = -EINVAL;
- /* sleep for a second or two to give the kernel a chance to
- * create the dev file
- */
- sleep(1);
-
- udev_init();
-
/* for now, the block layer is the only place where block devices are */
if (strcmp(subsystem, "block") == 0)
- type = 'b';
+ dev.type = 'b';
else
- type = 'c';
+ dev.type = 'c';
- class_dev = get_class_dev(device);
- if (class_dev == NULL)
+ retval = sleep_for_dev(path);
+ if (retval)
goto exit;
- retval = namedev_name_device(class_dev, &attr);
- if (retval)
- return retval;
+ class_dev = get_class_dev(path);
+ if (class_dev == NULL)
+ goto exit;
- retval = get_major_minor(class_dev, &major, &minor);
+ retval = get_major_minor(class_dev, &dev);
if (retval) {
- dbg ("get_major_minor failed");
+ dbg("get_major_minor failed");
goto exit;
}
- sysfs_close_class_device(class_dev);
+ retval = namedev_name_device(class_dev, &dev);
+ if (retval)
+ goto exit;
+
+ retval = udevdb_add_dev(path, &dev);
+ if (retval != 0)
+ dbg("udevdb_add_dev failed, but we are going to try to create the node anyway. "
+ "But remove might not work properly for this device.");
- return create_node(attr.name, type, major, minor, attr.mode);
+ dbg("name = %s", dev.name);
+ retval = create_node(&dev);
exit:
+ if (class_dev)
+ sysfs_close_class_device(class_dev);
+
return retval;
}
~ianmdlvl / elogind.git / blobdiff