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device: look for all possible device names on udev events

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This commit is contained in:
Lennart Poettering 2010-04-08 04:34:21 +02:00
parent 16f6025e70
commit aab14b13b4
1 changed files with 69 additions and 25 deletions
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94
device.c
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@ -114,11 +114,34 @@ static int device_add_escaped_name(Unit *u, const char *dn, bool make_id) {
return 0;
}
static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) {
char *e;
Unit *u;
assert(m);
assert(dn);
assert(dn[0] == '/');
assert(_u);
if (!(e = unit_name_escape_path(dn+1, ".device")))
return -ENOMEM;
u = manager_get_unit(m, e);
free(e);
if (u) {
*_u = u;
return 1;
}
return 0;
}
static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) {
const char *dn, *names, *wants, *sysfs, *expose;
const char *dn, *names, *wants, *sysfs, *expose, *model;
Unit *u = NULL;
int r;
char *e, *w, *state;
char *w, *state;
size_t l;
bool delete;
struct udev_list_entry *item = NULL, *first = NULL;
@ -151,24 +174,39 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u
/* Ok, seems kinda interesting. Now, let's see if this one
* already exists. */
assert(sysfs[0] == '/');
if (!(e = unit_name_escape_path(sysfs+1, ".device")))
return -ENOMEM;
if ((r = device_find_escape_name(m, sysfs, &u)) < 0)
return r;
if (!(u = manager_get_unit(m, e))) {
const char *model;
if (r == 0 && dn)
if ((r = device_find_escape_name(m, dn, &u)) < 0)
return r;
if (r == 0) {
first = udev_device_get_devlinks_list_entry(dev);
udev_list_entry_foreach(item, first) {
if ((r = device_find_escape_name(m, udev_list_entry_get_name(item), &u)) < 0)
return r;
if (r > 0)
break;
}
}
/* FIXME: this needs proper merging */
assert((r > 0) == !!u);
/* If this is a different unit, then let's not merge things */
if (u && DEVICE(u)->sysfs && !streq(DEVICE(u)->sysfs, sysfs))
u = NULL;
if (!u) {
delete = true;
if (!(u = unit_new(m))) {
free(e);
if (!(u = unit_new(m)))
return -ENOMEM;
}
r = unit_add_name(u, e);
free(e);
if (r < 0)
if ((r = device_add_escaped_name(u, sysfs, true)) < 0)
goto fail;
if (!(DEVICE(u)->sysfs = strdup(sysfs))) {
@ -176,19 +214,9 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u
goto fail;
}
if ((model = udev_device_get_property_value(dev, "ID_MODEL_FROM_DATABASE")) ||
(model = udev_device_get_property_value(dev, "ID_MODEL"))) {
if ((r = unit_set_description(u, model)) < 0)
goto fail;
} else if (dn)
if ((r = unit_set_description(u, dn)) < 0)
goto fail;
unit_add_to_load_queue(u);
} else {
} else
delete = false;
free(e);
}
if (dn)
if ((r = device_add_escaped_name(u, dn, true)) < 0)
@ -199,8 +227,22 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u
if ((r = device_add_escaped_name(u, udev_list_entry_get_name(item), false)) < 0)
goto fail;
if ((model = udev_device_get_property_value(dev, "ID_MODEL_FROM_DATABASE")) ||
(model = udev_device_get_property_value(dev, "ID_MODEL"))) {
if ((r = unit_set_description(u, model)) < 0)
goto fail;
} else if (dn)
if ((r = unit_set_description(u, dn)) < 0)
goto fail;
/* We don't remove names that are gone. But that should be
* fine and should probably be fixed only on a configuration
* refresh. */
if (names) {
FOREACH_WORD(w, l, names, state) {
char *e;
if (!(e = strndup(w, l))) {
r = -ENOMEM;
goto fail;
@ -216,6 +258,8 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u
if (wants) {
FOREACH_WORD(w, l, wants, state) {
char *e;
if (!(e = strndup(w, l))) {
r = -ENOMEM;
goto fail;