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libudev: enumerate - add lookup by property

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This commit is contained in:
Kay Sievers 2008-12-29 07:42:19 +01:00
parent 109d114578
commit f089350234
4 changed files with 73 additions and 0 deletions
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1
udev/lib/exported_symbols
View File

@ -42,6 +42,7 @@ udev_enumerate_add_match_subsystem
udev_enumerate_add_nomatch_subsystem
udev_enumerate_add_match_sysattr
udev_enumerate_add_nomatch_sysattr
udev_enumerate_add_match_property
udev_enumerate_scan_devices
udev_enumerate_scan_subsystems
udev_enumerate_add_syspath

62
udev/lib/libudev-enumerate.c
View File

@ -39,6 +39,7 @@ struct udev_enumerate {
struct udev_list_node sysattr_nomatch_list;
struct udev_list_node subsystem_match_list;
struct udev_list_node subsystem_nomatch_list;
struct udev_list_node properties_match_list;
struct udev_list_node devices_list;
int devices_sorted;
};
@ -63,6 +64,7 @@ struct udev_enumerate *udev_enumerate_new(struct udev *udev)
udev_list_init(&udev_enumerate->sysattr_nomatch_list);
udev_list_init(&udev_enumerate->subsystem_match_list);
udev_list_init(&udev_enumerate->subsystem_nomatch_list);
udev_list_init(&udev_enumerate->properties_match_list);
return udev_enumerate;
}
@ -86,6 +88,7 @@ void udev_enumerate_unref(struct udev_enumerate *udev_enumerate)
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->sysattr_nomatch_list);
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->subsystem_match_list);
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->subsystem_nomatch_list);
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->properties_match_list);
free(udev_enumerate);
}
@ -178,6 +181,18 @@ exit:
return match;
}
int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value)
{
if (udev_enumerate == NULL)
return -EINVAL;
if (property == NULL)
return 0;
if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate),
&udev_enumerate->properties_match_list, property, value, 1, 0) == NULL)
return -ENOMEM;
return 0;
}
static int match_sysattr(struct udev_enumerate *udev_enumerate, const char *syspath)
{
struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
@ -204,6 +219,51 @@ static int match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysp
return 1;
}
static int match_property(struct udev_enumerate *udev_enumerate, const char *syspath)
{
struct udev_device *dev;
struct udev_list_entry *list_entry;
int match = 0;
/* no match always matches */
if (udev_list_get_entry(&udev_enumerate->properties_match_list) == NULL)
return 1;
/* no device does not match */
dev = udev_device_new_from_syspath(udev_enumerate->udev, syspath);
if (dev == NULL)
return 0;
/* loop over matches */
udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->properties_match_list)) {
struct udev_list_entry *property_entry;
/* loop over device properties */
udev_list_entry_foreach(property_entry, udev_device_get_properties_list_entry(dev)) {
if (fnmatch(udev_list_entry_get_name(list_entry), udev_list_entry_get_name(property_entry), 0) == 0) {
const char *match_value;
const char *dev_value;
match_value = udev_list_entry_get_value(list_entry);
dev_value = udev_list_entry_get_value(property_entry);
if (match_value == NULL && dev_value == NULL) {
match = 1;
goto out;
}
if (match_value == NULL || dev_value == NULL)
continue;
if (fnmatch(match_value, dev_value, 0) == 0) {
match = 1;
goto out;
}
}
}
}
out:
udev_device_unref(dev);
return match;
}
static int scan_dir_and_add_devices(struct udev_enumerate *udev_enumerate,
const char *basedir, const char *subdir1, const char *subdir2)
{
@ -248,6 +308,8 @@ static int scan_dir_and_add_devices(struct udev_enumerate *udev_enumerate,
continue;
if (!match_sysattr(udev_enumerate, syspath))
continue;
if (!match_property(udev_enumerate, syspath))
continue;
udev_list_entry_add(udev, &udev_enumerate->devices_list, syspath, NULL, 1, 1);
}
closedir(dir);

1
udev/lib/libudev.h
View File

@ -101,6 +101,7 @@ extern int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumer
extern int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem);
extern int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value);
extern int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value);
extern int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value);
extern int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath);
extern int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate);
extern int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate);

9
udev/lib/test-libudev.c
View File

@ -359,6 +359,15 @@ static int test_enumerate(struct udev *udev, const char *subsystem)
udev_enumerate_scan_subsystems(udev_enumerate);
test_enumerate_print_list(udev_enumerate);
udev_enumerate_unref(udev_enumerate);
printf("enumerate 'property IF_FS_*=filesystem'\n");
udev_enumerate = udev_enumerate_new(udev);
if (udev_enumerate == NULL)
return -1;
udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem");
udev_enumerate_scan_devices(udev_enumerate);
test_enumerate_print_list(udev_enumerate);
udev_enumerate_unref(udev_enumerate);
return 0;
}