Targeting more than half a million people displaced by fighting in Iraq.
Four injured in the attack on U.N. barges delivering food aid.
100 countries voted in favor of approving resolution.
The U.N. has restarted its aid mission in the besieged rebel-held Old City of Homs.
U.N. chief's decision to invite Iran - only to withdraw the invitation a day later - proved a diplomatic fiasco.
Deep divisions in the Security Council have kept it from taking more action on civil war that activists say has killed more than 120,000 people.
Will provide some influence before the U.N. top human rights body.
Added that the international community must "prove its seriousness" by forcing Damascus to agree on trust-building measures.
World powers raised hopes for the first face-to-face talks to end the Syrian civil war as the United Nations called the warring parties to the table.
Legislative elections serve as last step in restoring constitutional role following March 2012 coup.