mirror of
https://github.com/systemd/systemd.git
synced 2024-10-27 18:55:40 +03:00
[PATCH] major database cleanups
Now we standardise on a struct udevice to pass around, and store in the database. This cleaned up the database code a lot.
This commit is contained in:
parent
c8c47999ff
commit
5840bc63e2
57
udev-add.c
57
udev-add.c
@ -70,33 +70,37 @@ exit:
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/*
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* We also want to add some permissions here, and possibly some symlinks
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*/
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static int create_node(char *name, char type, int major, int minor, mode_t mode)
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static int create_node(struct udevice *dev)
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{
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char filename[255];
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int retval = 0;
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strncpy(filename, UDEV_ROOT, sizeof(filename));
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strncat(filename, name, sizeof(filename));
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switch (type) {
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strncat(filename, dev->name, sizeof(filename));
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switch (dev->type) {
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case 'b':
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mode |= S_IFBLK;
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dev->mode |= S_IFBLK;
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break;
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case 'c':
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case 'u':
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mode |= S_IFCHR;
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dev->mode |= S_IFCHR;
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break;
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case 'p':
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mode |= S_IFIFO;
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dev->mode |= S_IFIFO;
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break;
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default:
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dbg("unknown node type %c\n", type);
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dbg("unknown node type %c\n", dev->type);
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return -EINVAL;
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}
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dbg("mknod(%s, %#o, %u, %u)", filename, mode, major, minor);
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retval = mknod(filename, mode, makedev(major, minor));
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dbg("mknod(%s, %#o, %u, %u)", filename, dev->mode, dev->major, dev->minor);
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retval = mknod(filename, dev->mode, makedev(dev->major, dev->minor));
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if (retval)
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dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
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filename, mode, major, minor, strerror(errno));
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filename, dev->mode, dev->major, dev->minor, strerror(errno));
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// FIXME set the ownership of the node
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return retval;
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}
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@ -126,7 +130,7 @@ exit:
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* If it doesn't happen in about 10 seconds, give up.
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*/
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#define SECONDS_TO_WAIT_FOR_DEV 10
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int sleep_for_dev(char *device)
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int sleep_for_dev(char *path)
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{
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char filename[SYSFS_PATH_MAX + 6];
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struct stat buf;
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@ -134,7 +138,7 @@ int sleep_for_dev(char *device)
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int retval = -ENODEV;
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strcpy(filename, sysfs_path);
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strcat(filename, device);
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strcat(filename, path);
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strcat(filename, "/dev");
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while (loop < SECONDS_TO_WAIT_FOR_DEV) {
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@ -154,20 +158,18 @@ exit:
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return retval;
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}
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int udev_add_device(char *device, char *subsystem)
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int udev_add_device(char *path, char *subsystem)
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{
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struct sysfs_class_device *class_dev;
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struct udevice dev;
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struct device_attr attr;
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int major;
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int minor;
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char type;
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int retval = -EINVAL;
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/* for now, the block layer is the only place where block devices are */
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if (strcmp(subsystem, "block") == 0)
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type = 'b';
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dev.type = 'b';
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else
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type = 'c';
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dev.type = 'c';
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retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
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dbg("sysfs_path = %s", sysfs_path);
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@ -176,11 +178,11 @@ int udev_add_device(char *device, char *subsystem)
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goto exit;
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}
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retval = sleep_for_dev(device);
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retval = sleep_for_dev(path);
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if (retval)
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goto exit;
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class_dev = get_class_dev(device);
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class_dev = get_class_dev(path);
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if (class_dev == NULL)
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goto exit;
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@ -188,21 +190,26 @@ int udev_add_device(char *device, char *subsystem)
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if (retval)
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return retval;
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retval = get_major_minor(class_dev, &major, &minor);
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retval = get_major_minor(class_dev, &dev.major, &dev.minor);
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if (retval) {
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dbg("get_major_minor failed");
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goto exit;
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}
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retval = udevdb_add_device(device, class_dev, attr.name, type, major, minor, attr.mode);
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strcpy(dev.name, attr.name);
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strcpy(dev.owner, attr.owner);
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strcpy(dev.group, attr.group);
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dev.mode = attr.mode;
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retval = udevdb_add_dev(path, &dev);
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if (retval != 0)
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dbg("udevdb_add_device failed, but we are going to try to create the node anyway. "
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dbg("udevdb_add_dev failed, but we are going to try to create the node anyway. "
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"But remove might not work properly for this device.");
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sysfs_close_class_device(class_dev);
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return create_node(attr.name, type, major, minor, attr.mode);
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dbg("name = %s", dev.name);
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retval = create_node(&dev);
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exit:
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return retval;
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@ -40,15 +40,20 @@
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* something different from the kernel name. If we have, us it. If not, use
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* the default kernel name for lack of anything else to know to do.
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*/
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static char *get_name(char *dev, int major, int minor)
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static char *get_name(char *path, int major, int minor)
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{
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static char name[100];
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struct udevice *dev;
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char *temp;
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if (udevdb_get_dev(dev, &name[0], sizeof(name)) == 0)
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dev = udevdb_get_dev(path);
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if (dev != NULL) {
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strcpy(name, dev->name);
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goto exit;
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}
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temp = strrchr(dev, '/');
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dbg("%s not found in database, falling back on default name", path);
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temp = strrchr(path, '/');
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if (temp == NULL)
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return NULL;
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strncpy(name, &temp[1], sizeof(name));
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@ -84,7 +89,6 @@ int udev_remove_device(char *device, char *subsystem)
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goto exit;
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}
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udevdb_delete_udevice(name);
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udevdb_delete_dev(device);
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return delete_node(name);
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15
udev.h
15
udev.h
@ -23,6 +23,7 @@
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#ifndef UDEV_H
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#define UDEV_H
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#include "libsysfs/libsysfs.h"
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#ifdef DEBUG
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#include <syslog.h>
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@ -62,8 +63,18 @@ struct device_attr {
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mode_t mode;
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};
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extern int udev_add_device(char *device, char *subsystem);
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extern int udev_remove_device(char *device, char *subsystem);
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struct udevice {
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char name[NAME_SIZE];
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char owner[OWNER_SIZE];
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char group[GROUP_SIZE];
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char type;
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int major;
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int minor;
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mode_t mode;
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};
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extern int udev_add_device(char *path, char *subsystem);
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extern int udev_remove_device(char *path, char *subsystem);
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extern char **main_argv;
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extern char **main_envp;
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335
udevdb.c
335
udevdb.c
@ -41,212 +41,58 @@
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static TDB_CONTEXT *udevdb;
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struct sysfsdb_record {
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char name[PATH_SIZE];
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};
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/**
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* namedb_record - device name is key, remaining udevice info stored here.
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*/
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struct namedb_record {
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char sysfs_dev_path[PATH_SIZE];
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char class_dev_name[NAME_SIZE];
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char class_name[NAME_SIZE];
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char id[ID_SIZE];
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char type;
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int major;
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int minor;
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mode_t mode;
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};
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/**
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* udevdb_close: close udev database
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*/
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static void udevdb_close(void)
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{
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if (udevdb != NULL) {
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tdb_close(udevdb);
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udevdb = NULL;
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}
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}
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/**
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* udevdb_open: opens udev's database
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* @method: database can either be in memory - UDEVDB_INTERNAL - or
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* written to a file with UDEVDB_DEFAULT.
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*/
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static int udevdb_open(int method)
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{
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udevdb = tdb_open(UDEV_CONFIG_DIR UDEV_DB, 0, method, O_RDWR | O_CREAT, 0644);
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if (udevdb == NULL) {
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if (method == UDEVDB_INTERNAL)
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dbg("Unable to initialize in-memory database");
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else
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dbg("Unable to initialize database at %s", UDEV_CONFIG_DIR UDEV_DB);
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return -EINVAL;
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}
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return 0;
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}
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static struct sysfsdb_record *sysfsdb_fetch(const char *path)
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int udevdb_add_dev(const char *path, const struct udevice *dev)
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{
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TDB_DATA key, data;
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char keystr[PATH_SIZE+2];
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struct sysfsdb_record *rec = NULL;
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char keystr[SYSFS_PATH_MAX];
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if (strlen(path) >= PATH_SIZE)
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return NULL;
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if ((path == NULL) || (dev == NULL))
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return -ENODEV;
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memset(keystr, 0, sizeof(keystr));
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memset(keystr, 0, NAME_SIZE);
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strcpy(keystr, path);
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dbg("keystr = %s", keystr);
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key.dptr = (void *)keystr;
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key.dptr = keystr;
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key.dsize = strlen(keystr) + 1;
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data = tdb_fetch(udevdb, key);
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if (data.dptr == NULL || data.dsize == 0) {
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dbg("tdb_fetch did not work :(");
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return NULL;
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}
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rec = (struct sysfsdb_record *)malloc(sizeof(struct sysfsdb_record));
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if (rec == NULL) {
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free(data.dptr);
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return NULL;
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}
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data.dptr = (void *)dev;
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data.dsize = sizeof(*dev);
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memcpy(rec, data.dptr, sizeof(struct sysfsdb_record));
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free(data.dptr);
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return rec;
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return tdb_store(udevdb, key, data, TDB_REPLACE);
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}
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/**
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* namedb_fetch
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*/
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static struct namedb_record *namedb_fetch(const char *name)
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struct udevice *udevdb_get_dev(const char *path)
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{
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TDB_DATA key, data;
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char nm_keystr[NAME_SIZE];
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struct namedb_record *nrec = NULL;
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struct udevice *dev;
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if (name == NULL)
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return NULL;
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if (strlen(name) >= NAME_SIZE)
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if (path == NULL)
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return NULL;
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memset(nm_keystr, 0, NAME_SIZE);
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strcpy(nm_keystr, name);
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key.dptr = (void *)nm_keystr;
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key.dsize = strlen(nm_keystr) + 1;
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key.dptr = (void *)path;
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key.dsize = strlen(path) + 1;
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data = tdb_fetch(udevdb, key);
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if (data.dptr == NULL || data.dsize == 0)
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return NULL;
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nrec = (struct namedb_record *)malloc(sizeof(struct namedb_record));
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if (nrec == NULL) {
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free(data.dptr);
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return NULL;
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}
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dev = malloc(sizeof(*dev));
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if (dev == NULL)
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goto exit;
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memcpy(nrec, data.dptr, sizeof(struct namedb_record));
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memcpy(dev, data.dptr, sizeof(*dev));
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exit:
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free(data.dptr);
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return nrec;
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return dev;
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}
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static int sysfs_store(const char *path, const struct udevice *dev)
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{
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TDB_DATA key, data;
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char keystr[PATH_SIZE+2];
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struct sysfsdb_record rec;
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int retval = 0;
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if (dev == NULL)
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return -ENODEV;
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memset(keystr, 0, sizeof(keystr));
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strcpy(keystr, path);
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key.dptr = (void *)keystr;
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key.dsize = strlen(keystr) + 1;
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strcpy(rec.name, dev->name);
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data.dptr = (void *) &rec;
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data.dsize = sizeof(rec);
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retval = tdb_store(udevdb, key, data, TDB_REPLACE);
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return retval;
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}
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/**
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* namedb_store
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*/
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static int namedb_store(const struct udevice *dev)
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{
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TDB_DATA key, data;
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char keystr[NAME_SIZE];
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struct namedb_record rec;
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int retval = 0;
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if (dev == NULL)
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return -1;
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memset(keystr, 0, NAME_SIZE);
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strcpy(keystr, dev->name);
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key.dptr = (void *)keystr;
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key.dsize = strlen(keystr) + 1;
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strcpy(rec.sysfs_dev_path, dev->sysfs_dev_path);
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strcpy(rec.id, dev->bus_id);
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strcpy(rec.class_dev_name, dev->class_dev_name);
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strcpy(rec.class_name, dev->class_name);
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rec.type = dev->type;
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rec.major = dev->major;
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rec.minor = dev->minor;
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rec.mode = dev->mode;
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data.dptr = (void *) &rec;
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data.dsize = sizeof(rec);
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retval = tdb_store(udevdb, key, data, TDB_REPLACE);
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return retval;
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}
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/**
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* namedb_delete
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*/
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static int namedb_delete(const char *name)
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int udevdb_delete_dev(const char *path)
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{
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TDB_DATA key;
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char keystr[NAME_SIZE];
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int retval = 0;
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char keystr[SYSFS_PATH_MAX];
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if (name == NULL)
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return -1;
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if (strlen(name) >= NAME_SIZE)
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return -1;
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memset(keystr, 0, NAME_SIZE);
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strcpy(keystr, name);
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key.dptr = (void *)keystr;
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key.dsize = strlen(keystr) + 1;
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retval = tdb_delete(udevdb, key);
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return retval;
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}
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static int sysfs_delete(const char *path)
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{
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TDB_DATA key;
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char keystr[PATH_SIZE];
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if (path == NULL)
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return -EINVAL;
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memset(keystr, 0, sizeof(keystr));
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strcpy(keystr, path);
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@ -257,135 +103,34 @@ static int sysfs_delete(const char *path)
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return tdb_delete(udevdb, key);
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}
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/**
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* udevdb_delete_udevice
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*/
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int udevdb_delete_udevice(const char *name)
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{
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struct namedb_record *nrec = NULL;
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if (name == NULL)
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return -1;
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nrec = namedb_fetch(name);
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if (nrec == NULL)
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return -1;
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namedb_delete(name);
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free(nrec);
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return 0;
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}
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/**
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* udevdb_add_device: adds class device to database
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*/
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int udevdb_add_device(const char *device, const struct sysfs_class_device *class_dev, const char *name, char type, int major, int minor, int mode)
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{
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struct udevice dbdev;
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if (class_dev == NULL)
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return -ENODEV;
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memset(&dbdev, 0, sizeof(dbdev));
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strncpy(dbdev.name, name, NAME_SIZE);
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if (class_dev->sysdevice) {
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strncpy(dbdev.sysfs_dev_path, class_dev->sysdevice->directory->path, PATH_SIZE);
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strncpy(dbdev.bus_id, class_dev->sysdevice->bus_id, ID_SIZE);
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}
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strncpy(dbdev.class_dev_name, class_dev->name, NAME_SIZE);
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// if ((sysfs_get_name_from_path(subsystem, dbdev.class_name, NAME_SIZE)) != 0)
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// strcpy(dbdev.class_name, "unknown");
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dbdev.type = type;
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dbdev.major = major;
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dbdev.minor = minor;
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dbdev.mode = mode;
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if ((sysfs_store(device, &dbdev)) != 0)
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return -1;
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// if ((namedb_store(&dbdev)) != 0)
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// return -1;
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return 0;
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}
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/**
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* udevdb_get_device: grab's device by name
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*/
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struct udevice *udevdb_get_udevice(const char *name)
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||||
{
|
||||
struct namedb_record *nrec = NULL;
|
||||
struct udevice *dev = NULL;
|
||||
|
||||
if (name == NULL)
|
||||
return NULL;
|
||||
|
||||
nrec = namedb_fetch(name);
|
||||
if (nrec == NULL)
|
||||
return NULL;
|
||||
|
||||
dev = (struct udevice *)malloc(sizeof(struct udevice));
|
||||
if (dev == NULL) {
|
||||
free(nrec);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
strcpy(dev->name, name);
|
||||
strcpy(dev->sysfs_dev_path, nrec->sysfs_dev_path);
|
||||
strcpy(dev->class_dev_name, nrec->class_dev_name);
|
||||
strcpy(dev->class_name, nrec->class_name);
|
||||
strcpy(dev->bus_id, nrec->id);
|
||||
dev->type = nrec->type;
|
||||
dev->major = nrec->major;
|
||||
dev->minor = nrec->minor;
|
||||
dev->mode = nrec->mode;
|
||||
|
||||
free(nrec);
|
||||
|
||||
return dev;
|
||||
}
|
||||
|
||||
int udevdb_get_dev(const char *path, char *name, size_t name_size)
|
||||
{
|
||||
struct sysfsdb_record *rec = NULL;
|
||||
|
||||
if ((path == NULL) || (name == NULL) || (name_size < 1))
|
||||
return -EINVAL;
|
||||
|
||||
rec = sysfsdb_fetch(path);
|
||||
if (rec == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
if (strlen(rec->name) >= name_size)
|
||||
return -EINVAL;
|
||||
|
||||
strncpy(name, rec->name, name_size);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int udevdb_delete_dev(const char *path)
|
||||
{
|
||||
if (path == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
return sysfs_delete(path);
|
||||
}
|
||||
|
||||
/**
|
||||
* udevdb_exit: closes database
|
||||
*/
|
||||
void udevdb_exit(void)
|
||||
{
|
||||
udevdb_close();
|
||||
if (udevdb != NULL) {
|
||||
tdb_close(udevdb);
|
||||
udevdb = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* udevdb_init: initializes database
|
||||
* @init_flag: database can either be in memory - UDEVDB_INTERNAL - or
|
||||
* written to a file with UDEVDB_DEFAULT.
|
||||
*/
|
||||
int udevdb_init(int init_flag)
|
||||
{
|
||||
if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
|
||||
return -1;
|
||||
return -EINVAL;
|
||||
|
||||
return udevdb_open(init_flag);
|
||||
udevdb = tdb_open(UDEV_CONFIG_DIR UDEV_DB, 0, init_flag, O_RDWR | O_CREAT, 0644);
|
||||
if (udevdb == NULL) {
|
||||
if (init_flag == UDEVDB_INTERNAL)
|
||||
dbg("Unable to initialize in-memory database");
|
||||
else
|
||||
dbg("Unable to initialize database at %s", UDEV_CONFIG_DIR UDEV_DB);
|
||||
return -EINVAL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
25
udevdb.h
25
udevdb.h
@ -6,35 +6,16 @@
|
||||
|
||||
#define UDEV_DB "udevdb.tdb"
|
||||
|
||||
#define PATH_SIZE 256
|
||||
|
||||
#define UDEVDB_DEL "#"
|
||||
|
||||
/* Udevdb initialization flags */
|
||||
#define UDEVDB_DEFAULT 0 /* Defaults database to use file */
|
||||
#define UDEVDB_INTERNAL 1 /* Don't store db on disk, use in memory */
|
||||
|
||||
struct udevice {
|
||||
char name[NAME_SIZE];
|
||||
char sysfs_dev_path[PATH_SIZE];
|
||||
char class_dev_name[NAME_SIZE];
|
||||
char class_name[NAME_SIZE];
|
||||
char bus_id[NAME_SIZE];
|
||||
char bus_name[NAME_SIZE];
|
||||
char type;
|
||||
int major;
|
||||
int minor;
|
||||
mode_t mode;
|
||||
};
|
||||
|
||||
/* Function Prototypes */
|
||||
extern void udevdb_exit(void);
|
||||
extern int udevdb_init(int init_flag);
|
||||
extern int udevdb_delete_udevice(const char *name);
|
||||
extern int udevdb_add_device(const char *device, const struct sysfs_class_device *class_dev, const char *name, char type, int major, int minor, int mode);
|
||||
extern struct udevice *udevdb_get_udevice(const char *name);
|
||||
extern char *udevdb_get_udevice_by_sysfs(const char *path);
|
||||
extern int udevdb_get_dev(const char *path, char *name, size_t name_size);
|
||||
|
||||
extern int udevdb_add_dev(const char *path, const struct udevice *dev);
|
||||
extern struct udevice *udevdb_get_dev(const char *path);
|
||||
extern int udevdb_delete_dev(const char *path);
|
||||
|
||||
#endif /* _UDEVDB_H_ */
|
||||
|
Loading…
Reference in New Issue
Block a user