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sd-device: introduce sd_device_set_sysattr_valuef()

This commit is contained in:
Yu Watanabe 2020-09-11 17:41:10 +09:00
parent f8bff7805e
commit ea2bc25762
3 changed files with 25 additions and 0 deletions
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1
src/libsystemd/libsystemd.sym
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@ -732,4 +732,5 @@ global:
sd_device_get_current_tag_first;
sd_device_get_current_tag_next;
sd_device_has_current_tag;
sd_device_set_sysattr_valuef;
} LIBSYSTEMD_246;

23
src/libsystemd/sd-device/sd-device.c
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@ -1979,3 +1979,26 @@ _public_ int sd_device_set_sysattr_value(sd_device *device, const char *sysattr,
return 0;
}
_public_ int sd_device_set_sysattr_valuef(sd_device *device, const char *sysattr, const char *format, ...) {
_cleanup_free_ char *value = NULL;
va_list ap;
int r;
assert_return(device, -EINVAL);
assert_return(sysattr, -EINVAL);
if (!format) {
device_remove_sysattr_value(device, sysattr);
return 0;
}
va_start(ap, format);
r = vasprintf(&value, format, ap);
va_end(ap);
if (r < 0)
return -ENOMEM;
return sd_device_set_sysattr_value(device, sysattr, value);
}

1
src/systemd/sd-device.h
View File

@ -79,6 +79,7 @@ int sd_device_get_property_value(sd_device *device, const char *key, const char
int sd_device_get_sysattr_value(sd_device *device, const char *sysattr, const char **_value);
int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, const char *value);
int sd_device_set_sysattr_valuef(sd_device *device, const char *sysattr, const char *format, ...) _sd_printf_(3, 4);
/* device enumerator */