#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <grp.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <linux/sockios.h>
+#ifndef __KLIBC__
+#include <pwd.h>
+#include <utmp.h>
+#endif
+#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
+#include "udev_lib.h"
#include "udev_version.h"
+#include "logging.h"
#include "namedev.h"
#include "udevdb.h"
-#include "libsysfs/libsysfs.h"
+#include "klibc_fixups.h"
+#define LOCAL_USER "$local"
/*
* 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;
+ struct sysfs_attribute *attr = NULL;
- char *dev;
+ attr = sysfs_get_classdev_attr(class_dev, "dev");
+ if (attr == NULL)
+ goto error;
+ dbg("dev='%s'", attr->value);
- dev = sysfs_get_value_from_attributes(class_dev->directory->attributes, "dev");
- if (dev == NULL)
- goto exit;
+ if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
+ goto error;
+ dbg("found major=%d, minor=%d", udev->major, udev->minor);
+
+ return 0;
+error:
+ return -1;
+}
+
+static int create_path(char *file)
+{
+ char p[NAME_SIZE];
+ char *pos;
+ int retval;
+ struct stat stats;
+
+ strfieldcpy(p, file);
+ pos = strchr(p+1, '/');
+ while (1) {
+ pos = strchr(pos+1, '/');
+ if (pos == NULL)
+ break;
+ *pos = 0x00;
+ if (stat(p, &stats)) {
+ retval = mkdir(p, 0755);
+ if (retval != 0) {
+ dbg("mkdir(%s) failed with error '%s'",
+ p, strerror(errno));
+ return retval;
+ }
+ dbg("created '%s'", p);
+ }
+ *pos = '/';
+ }
+ return 0;
+}
+
+static int make_node(char *filename, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
+{
+ int retval;
- dbg("dev = %s", dev);
+ retval = mknod(filename, mode, makedev(major, minor));
+ if (retval != 0) {
+ dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
+ filename, mode, major, minor, strerror(errno));
+ goto exit;
+ }
- if (sscanf(dev, "%u:%u", major, minor) != 2)
+ dbg("chmod(%s, %#o)", filename, mode);
+ if (chmod(filename, mode) != 0) {
+ dbg("chmod(%s, %#o) failed with error '%s'",
+ filename, mode, strerror(errno));
goto exit;
+ }
- dbg("found major = %d, minor = %d", *major, *minor);
+ if (uid != 0 || gid != 0) {
+ dbg("chown(%s, %u, %u)", filename, uid, gid);
+ if (chown(filename, uid, gid) != 0) {
+ dbg("chown(%s, %u, %u) failed with error '%s'",
+ filename, uid, gid, strerror(errno));
+ goto exit;
+ }
+ }
- retval = 0;
exit:
return retval;
}
-/*
- * We also want to add some permissions here, and possibly some symlinks
- */
-static int create_node(char *name, char type, int major, int minor, int mode)
+/* get the local logged in user */
+static void set_to_local_user(char *user)
+{
+ struct utmp *u;
+ time_t recent = 0;
+
+ strfieldcpymax(user, default_owner_str, OWNER_SIZE);
+ setutent();
+ while (1) {
+ u = getutent();
+ if (u == NULL)
+ break;
+
+ /* is this a user login ? */
+ if (u->ut_type != USER_PROCESS)
+ continue;
+
+ /* is this a local login ? */
+ if (strcmp(u->ut_host, ""))
+ continue;
+
+ if (u->ut_time > recent) {
+ recent = u->ut_time;
+ strfieldcpymax(user, u->ut_user, OWNER_SIZE);
+ dbg("local user is '%s'", user);
+ break;
+ }
+ }
+ endutent();
+}
+
+static int unlink_entry(char *filename)
{
- char filename[255];
+ struct stat stats;
int retval = 0;
- strncpy(filename, UDEV_ROOT, sizeof(filename));
- strncat(filename, name, sizeof(filename));
- switch (type) {
+
+ if (lstat(filename, &stats) == 0) {
+ if ((stats.st_mode & S_IFMT) != S_IFDIR) {
+ retval = unlink(filename);
+ if (retval) {
+ dbg("unlink(%s) failed with error '%s'",
+ filename, strerror(errno));
+ }
+ }
+ }
+ return retval;
+}
+
+static int create_node(struct udevice *dev, int fake)
+{
+ char filename[NAME_SIZE];
+ char linkname[NAME_SIZE];
+ char linktarget[NAME_SIZE];
+ char partitionname[NAME_SIZE];
+ uid_t uid = 0;
+ gid_t gid = 0;
+ int i;
+ int tail;
+ char *pos;
+ int len;
+
+ strfieldcpy(filename, udev_root);
+ strfieldcat(filename, dev->name);
+
+ switch (dev->type) {
case 'b':
- mode |= S_IFBLK;
+ dev->mode |= S_IFBLK;
break;
case 'c':
case 'u':
- mode |= S_IFCHR;
+ dev->mode |= S_IFCHR;
break;
case 'p':
- mode |= S_IFIFO;
+ dev->mode |= S_IFIFO;
break;
default:
- dbg("unknown node type %c\n", type);
+ dbg("unknown node type %c\n", dev->type);
return -EINVAL;
}
- retval = mknod(filename,mode,makedev(major,minor));
- if (retval)
- dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
- filename, mode, major, minor, strerror(errno));
- return retval;
-}
+ /* create parent directories if needed */
+ if (strrchr(dev->name, '/'))
+ create_path(filename);
-struct sysfs_class_device *get_class_dev(char *device_name)
-{
- char sysfs_path[SYSFS_PATH_MAX];
- char dev_path[SYSFS_PATH_MAX];
- int retval;
- struct sysfs_class_device *class_dev = NULL;
+ if (dev->owner[0] != '\0') {
+ char *endptr;
+ unsigned long id = strtoul(dev->owner, &endptr, 10);
+ if (endptr[0] == '\0')
+ uid = (uid_t) id;
+ else {
+ struct passwd *pw;
+ if (strncmp(dev->owner, LOCAL_USER, sizeof(LOCAL_USER)) == 0)
+ set_to_local_user(dev->owner);
+ pw = getpwnam(dev->owner);
+ if (pw == NULL)
+ dbg("specified user unknown '%s'", dev->owner);
+ else
+ uid = pw->pw_uid;
+ }
+ }
- retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
- dbg("sysfs_path = %s", sysfs_path);
- if (retval) {
- dbg("sysfs_get_mnt_path failed");
- goto exit;
+ if (dev->group[0] != '\0') {
+ char *endptr;
+ unsigned long id = strtoul(dev->group, &endptr, 10);
+ if (endptr[0] == '\0')
+ gid = (gid_t) id;
+ else {
+ struct group *gr = getgrnam(dev->group);
+ if (gr == NULL)
+ dbg("specified group unknown '%s'", dev->group);
+ else
+ gid = gr->gr_gid;
+ }
+ }
+
+ if (!fake) {
+ unlink_entry(filename);
+ info("creating device node '%s'", filename);
+ if (make_node(filename, dev->major, dev->minor, dev->mode, uid, gid) != 0)
+ goto error;
+ } else {
+ info("creating device node '%s', major = '%d', minor = '%d', "
+ "mode = '%#o', uid = '%d', gid = '%d'", filename,
+ dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
}
- strcpy(dev_path, sysfs_path);
- strcat(dev_path, device_name);
+ /* create all_partitions if requested */
+ if (dev->partitions > 0) {
+ info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
+ if (!fake) {
+ for (i = 1; i <= dev->partitions; i++) {
+ strfieldcpy(partitionname, filename);
+ strintcat(partitionname, i);
+ unlink_entry(partitionname);
+ make_node(partitionname, dev->major,
+ dev->minor + i, dev->mode, uid, gid);
+ }
+ }
+ }
+
+ /* create symlink(s) if requested */
+ foreach_strpart(dev->symlink, " ", pos, len) {
+ strfieldcpymax(linkname, pos, len+1);
+ strfieldcpy(filename, udev_root);
+ strfieldcat(filename, linkname);
+ dbg("symlink '%s' to node '%s' requested", filename, dev->name);
+ if (!fake)
+ if (strrchr(linkname, '/'))
+ create_path(filename);
+
+ /* optimize relative link */
+ linktarget[0] = '\0';
+ i = 0;
+ tail = 0;
+ while ((dev->name[i] == linkname[i]) && dev->name[i]) {
+ if (dev->name[i] == '/')
+ tail = i+1;
+ i++;
+ }
+ while (linkname[i] != '\0') {
+ if (linkname[i] == '/')
+ strfieldcat(linktarget, "../");
+ i++;
+ }
+
+ strfieldcat(linktarget, &dev->name[tail]);
+
+ if (!fake)
+ unlink_entry(filename);
+
+ dbg("symlink(%s, %s)", linktarget, filename);
+ if (!fake) {
+ if (symlink(linktarget, filename) != 0)
+ dbg("symlink(%s, %s) failed with error '%s'",
+ linktarget, filename, strerror(errno));
+ }
+ }
+
+ return 0;
+error:
+ return -1;
+}
+
+static struct sysfs_class_device *get_class_dev(char *device_name)
+{
+ char dev_path[SYSFS_PATH_MAX];
+ struct sysfs_class_device *class_dev = NULL;
- dbg("looking at %s", dev_path);
+ strfieldcpy(dev_path, sysfs_path);
+ strfieldcat(dev_path, device_name);
+ dbg("looking at '%s'", dev_path);
/* open up the sysfs class device for this thing... */
- class_dev = sysfs_open_class_device(dev_path);
+ class_dev = sysfs_open_class_device_path(dev_path);
if (class_dev == NULL) {
- dbg ("sysfs_open_class_device failed");
+ dbg ("sysfs_open_class_device_path failed");
goto exit;
}
- dbg("class_dev->name = %s", class_dev->name);
+ dbg("class_dev->name='%s'", class_dev->name);
exit:
return class_dev;
}
-int udev_add_device(char *device, char *subsystem)
+/* 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_FILE 10
+static int sleep_for_file(char *path, char* file)
{
- struct sysfs_class_device *class_dev;
- struct device_attr attr;
- struct udevice dbdev;
- int major;
- int minor;
- char type;
- int retval = -EINVAL;
-
- /* for now, the block layer is the only place where block devices are */
- if (strcmp(subsystem, "block") == 0)
- type = 'b';
- else
- type = 'c';
-
- /* sleep for a second or two to give the kernel a chance to
- * create the dev file
- */
- sleep(1);
-
- class_dev = get_class_dev(device);
- if (class_dev == NULL)
- goto exit;
+ char filename[SYSFS_PATH_MAX + 6];
+ int loop = SECONDS_TO_WAIT_FOR_FILE;
+ int retval;
- retval = namedev_name_device(class_dev, &attr);
- if (retval)
- return retval;
+ strfieldcpy(filename, sysfs_path);
+ strfieldcat(filename, path);
+ strfieldcat(filename, file);
- retval = get_major_minor(class_dev, &major, &minor);
- if (retval) {
- dbg ("get_major_minor failed");
- goto exit;
+ while (loop--) {
+ struct stat buf;
+
+ dbg("looking for '%s'", filename);
+ retval = stat(filename, &buf);
+ if (retval == 0)
+ goto exit;
+
+ /* sleep to give the kernel a chance to create the dev file */
+ sleep(1);
+ }
+ retval = -ENODEV;
+exit:
+ return retval;
+}
+
+static int rename_net_if(struct udevice *dev, int fake)
+{
+ int sk;
+ struct ifreq ifr;
+ int retval;
+
+ dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
+ if (fake)
+ return 0;
+
+ sk = socket(PF_INET, SOCK_DGRAM, 0);
+ if (sk < 0) {
+ dbg("error opening socket");
+ return -1;
}
- memset(&dbdev, 0, sizeof(dbdev));
- strncpy(dbdev.name, attr.name, NAME_SIZE);
- strncpy(dbdev.sysfs_path, class_dev->sysdevice->directory->path,
- PATH_SIZE);
- strncpy(dbdev.class_dev_name, class_dev->name, NAME_SIZE);
- if ((sysfs_get_name_from_path(subsystem, dbdev.class_name, NAME_SIZE))
- != 0)
- strcpy(dbdev.class_name, "unkown");
- strncpy(dbdev.bus_id, class_dev->sysdevice->bus_id, ID_SIZE);
- strcpy(dbdev.bus_name, "unknown");
- if (class_dev->driver != NULL)
- strncpy(dbdev.driver, class_dev->driver->name, NAME_SIZE);
- else
- strcpy(dbdev.driver, "unkown");
- dbdev.type = type;
- dbdev.major = major;
- dbdev.minor = minor;
- dbdev.mode = attr.mode;
- sysfs_close_class_device(class_dev);
+ memset(&ifr, 0x00, sizeof(struct ifreq));
+ strfieldcpy(ifr.ifr_name, dev->kernel_name);
+ strfieldcpy(ifr.ifr_newname, dev->name);
- retval = udevdb_add_udevice(&dbdev);
+ retval = ioctl(sk, SIOCSIFNAME, &ifr);
if (retval != 0)
+ dbg("error changing net interface name");
+ close(sk);
+
+ return retval;
+}
+
+int udev_add_device(char *path, char *subsystem, int fake)
+{
+ struct sysfs_class_device *class_dev;
+ struct udevice dev;
+ char key[DEVPATH_SIZE];
+ char *pos;
+ int retval;
+
+ memset(&dev, 0x00, sizeof(dev));
+
+ dev.type = get_device_type(path, subsystem);
+ switch (dev.type) {
+ case 'b':
+ case 'c':
+ retval = sleep_for_file(path, "/dev");
+ break;
+
+ case 'n':
+ retval = sleep_for_file(path, "/address");
+ break;
+
+ default:
+ dbg("unknown device type '%c'", dev.type);
+ return -1;
+ }
+
+ class_dev = get_class_dev(path);
+ if (class_dev == NULL)
+ return -1;
+
+ if (dev.type == 'b' || dev.type == 'c') {
+ retval = get_major_minor(class_dev, &dev);
+ if (retval != 0) {
+ dbg("get_major_minor failed");
+ goto exit;
+ }
+ }
+
+ if (namedev_name_device(class_dev, &dev) != 0)
goto exit;
- return create_node(attr.name, type, major, minor, attr.mode);
+ dbg("name='%s'", dev.name);
+
+ switch (dev.type) {
+ case 'b':
+ case 'c':
+ retval = create_node(&dev, fake);
+ if (fake || retval != 0)
+ goto exit;
+ if (udevdb_add_dev(path, &dev) != 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.");
+ break;
+
+ case 'n':
+ strfieldcpy(key, path);
+ if (strcmp(dev.name, dev.kernel_name) != 0) {
+ retval = rename_net_if(&dev, fake);
+ if (fake || retval != 0)
+ goto exit;
+ /* netif's are keyed with the configured name, cause
+ * the original kernel name sleeps with the fishes
+ */
+ pos = strrchr(key, '/');
+ if (pos != NULL) {
+ pos[1] = '\0';
+ strfieldcat(key, dev.name);
+ }
+ }
+ if (udevdb_add_dev(key, &dev) != 0)
+ dbg("udevdb_add_dev failed");
+ break;
+ }
+
+ /* execute programs in dev.d/ with the name in the environment */
+ dev_d_send(&dev, subsystem);
exit:
+ sysfs_close_class_device(class_dev);
+
return retval;
}
-
~ianmdlvl / elogind.git / blobdiff