int show_sysfs(const char *seat, const char *prefix, unsigned n_columns) {
struct udev *udev;
struct udev_list_entry *first = NULL;
struct udev_enumerate *e;
int r;
if (n_columns <= 0)
n_columns = columns();
if (!prefix)
prefix = "";
if (isempty(seat))
seat = "seat0";
udev = udev_new();
if (!udev)
return -ENOMEM;
e = udev_enumerate_new(udev);
if (!e) {
r = -ENOMEM;
goto finish;
}
if (!streq(seat, "seat0"))
r = udev_enumerate_add_match_tag(e, seat);
else
r = udev_enumerate_add_match_tag(e, "seat");
if (r < 0)
goto finish;
r = udev_enumerate_scan_devices(e);
if (r < 0)
goto finish;
first = udev_enumerate_get_list_entry(e);
if (first)
show_sysfs_one(udev, seat, &first, "/", prefix, n_columns);
finish:
if (e)
udev_enumerate_unref(e);
if (udev)
udev_unref(udev);
return r;
}
/* add or remove a ACL for a given uid from all matching devices */
static void apply_acl_to_devices(uid_t uid, int add)
{
struct udev *udev;
struct udev_enumerate *enumerate;
struct udev_list_entry *list_entry;
/* iterate over all devices tagged with ACL_SET */
udev = udev_new();
enumerate = udev_enumerate_new(udev);
udev_enumerate_add_match_tag(enumerate, "udev-acl");
udev_enumerate_scan_devices(enumerate);
udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
struct udev_device *device;
const char *node;
device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
udev_list_entry_get_name(list_entry));
if (device == NULL)
continue;
node = udev_device_get_devnode(device);
if (node == NULL) {
udev_device_unref(device);
continue;
}
set_facl(node, uid, add);
udev_device_unref(device);
}
udev_enumerate_unref(enumerate);
udev_unref(udev);
}
int show_sysfs(const char *seat, const char *prefix, unsigned n_columns) {
_cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
_cleanup_udev_unref_ struct udev *udev = NULL;
struct udev_list_entry *first = NULL;
int r;
if (n_columns <= 0)
n_columns = columns();
if (!prefix)
prefix = "";
if (isempty(seat))
seat = "seat0";
udev = udev_new();
if (!udev)
return -ENOMEM;
e = udev_enumerate_new(udev);
if (!e)
return -ENOMEM;
if (!streq(seat, "seat0"))
r = udev_enumerate_add_match_tag(e, seat);
else
r = udev_enumerate_add_match_tag(e, "seat");
if (r < 0)
return r;
r = udev_enumerate_add_match_is_initialized(e);
if (r < 0)
return r;
r = udev_enumerate_scan_devices(e);
if (r < 0)
return r;
first = udev_enumerate_get_list_entry(e);
if (first)
show_sysfs_one(udev, seat, &first, "/", prefix, n_columns);
else
printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT), "(none)");
return r;
}
static int manager_enumerate_devices(Manager *m) {
struct udev_list_entry *item = NULL, *first = NULL;
_cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
int r;
assert(m);
/* Loads devices from udev and creates seats for them as
* necessary */
e = udev_enumerate_new(m->udev);
if (!e)
return -ENOMEM;
r = udev_enumerate_add_match_tag(e, "master-of-seat");
if (r < 0)
return r;
r = udev_enumerate_add_match_is_initialized(e);
if (r < 0)
return r;
r = udev_enumerate_scan_devices(e);
if (r < 0)
return r;
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
_cleanup_udev_device_unref_ struct udev_device *d = NULL;
int k;
d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
if (!d)
return -ENOMEM;
k = manager_process_seat_device(m, d);
if (k < 0)
r = k;
}
int devnode_acl_all(struct udev *udev,
const char *seat,
bool flush,
bool del, uid_t old_uid,
bool add, uid_t new_uid) {
_cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
struct udev_list_entry *item = NULL, *first = NULL;
_cleanup_set_free_free_ Set *nodes = NULL;
_cleanup_closedir_ DIR *dir = NULL;
struct dirent *dent;
Iterator i;
char *n;
int r;
assert(udev);
nodes = set_new(&string_hash_ops);
if (!nodes)
return -ENOMEM;
e = udev_enumerate_new(udev);
if (!e)
return -ENOMEM;
if (isempty(seat))
seat = "seat0";
/* We can only match by one tag in libudev. We choose
* "uaccess" for that. If we could match for two tags here we
* could add the seat name as second match tag, but this would
* be hardly optimizable in libudev, and hence checking the
* second tag manually in our loop is a good solution. */
r = udev_enumerate_add_match_tag(e, "uaccess");
if (r < 0)
return r;
r = udev_enumerate_add_match_is_initialized(e);
if (r < 0)
return r;
r = udev_enumerate_scan_devices(e);
if (r < 0)
return r;
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
_cleanup_udev_device_unref_ struct udev_device *d = NULL;
const char *node, *sn;
d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
if (!d)
return -ENOMEM;
sn = udev_device_get_property_value(d, "ID_SEAT");
if (isempty(sn))
sn = "seat0";
if (!streq(seat, sn))
continue;
node = udev_device_get_devnode(d);
/* In case people mistag devices with nodes, we need to ignore this */
if (!node)
continue;
n = strdup(node);
if (!n)
return -ENOMEM;
log_debug("Found udev node %s for seat %s", n, seat);
r = set_consume(nodes, n);
if (r < 0)
return r;
}
int devnode_acl_all(struct udev *udev,
const char *seat,
bool flush,
bool del, uid_t old_uid,
bool add, uid_t new_uid) {
struct udev_list_entry *item = NULL, *first = NULL;
struct udev_enumerate *e;
int r;
assert(udev);
if (isempty(seat))
seat = "seat0";
e = udev_enumerate_new(udev);
if (!e)
return -ENOMEM;
/* We can only match by one tag in libudev. We choose
* "uaccess" for that. If we could match for two tags here we
* could add the seat name as second match tag, but this would
* be hardly optimizable in libudev, and hence checking the
* second tag manually in our loop is a good solution. */
r = udev_enumerate_add_match_tag(e, "uaccess");
if (r < 0)
goto finish;
r = udev_enumerate_scan_devices(e);
if (r < 0)
goto finish;
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
struct udev_device *d;
const char *node, *sn;
d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
if (!d) {
r = -ENOMEM;
goto finish;
}
sn = udev_device_get_property_value(d, "ID_SEAT");
if (isempty(sn))
sn = "seat0";
if (!streq(seat, sn)) {
udev_device_unref(d);
continue;
}
node = udev_device_get_devnode(d);
if (!node) {
/* In case people mistag devices with nodes, we need to ignore this */
udev_device_unref(d);
continue;
}
log_debug("Fixing up %s for seat %s...", node, sn);
r = devnode_acl(node, flush, del, old_uid, add, new_uid);
udev_device_unref(d);
if (r < 0)
goto finish;
}
finish:
if (e)
udev_enumerate_unref(e);
return r;
}
