From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Ardhan Madras" Subject: Re: Help on pipe Date: Fri, 10 Jul 2009 11:21:22 -0700 Message-ID: <20090710112122.60FA2DF8@resin13.mta.everyone.net> Reply-To: Mime-Version: 1.0 Content-Transfer-Encoding: base64 Return-path: Sender: linux-c-programming-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="windows-1254" To: linux-c-programming@vger.kernel.org TXkgZGVtbyBjYW4gcnVuLiBpIHVzZSAtV2FsbCBmbGFnLCB0aGUgImNvbnN0IGNoYXIgKmFyZ3Zb Ml0gPSB7DQoic29ydCIsIE5VTEwgfSIgYXMgeW91IHNhaWQgd2FybmVkIHdpdGg6DQoNCnBpcGUu YzozNTogd2FybmluZzogcGFzc2luZyBhcmd1bWVudCAyIG9mICdleGVjdmUnIGZyb20gaW5jb21w YXRpYmxlDQpwb2ludGVyIHR5cGUuDQoNCmJ1dCBpdCdzIHBlcmZlY3QgZm9yICAiY2hhciAqIGNv bnN0IGFyZ3ZbMl0gPSB7ICJzb3J0IiwgTlVMTCB9Ig0KDQphbmQgaSBkZWZpbmUgImludCByZXQi IGZvciBib3RoIHByb2Nlc3MsIGJ1dCBpIHVuZGVzdGFuZCBmb3JraW5nDQptZWNoYW5pc20gb24g R05VL0xpbnV4Lg0KDQpzb3JyeSBpIGRvbid0IHdyaXRlIHRoZSBjb2RlIGNsZWFubHkuLiBNeSBw b2ludCBpcyBvbmx5IHRvIG1ha2UgdGhlDQoic29ydCIgd29ya2luZywgaW0gbm93IHVuZGVyc3Rh bmQgdGhhdCAic29ydCIgd2lsbCBhbHdheXMgd2FpdCBmb3INCmlucHV0IHVudGlsIGl0J3MgZW5k IChwZWVyIGNsb3NlZCB0aGUgaW5wdXQpLg0KDQpUaGFuayB5b3UgdmVyeSBtdWNoLg0KDQoNCg0K MjAwOS83LzEwIE1pY2hhxYIgTmF6YXJld2ljeiA8bS5uYXphcmV3aWN6QHNhbXN1bmcuY29tPjoN Cj4gT24gRnJpLCAxMCBKdWwgMjAwOSAwODoyMjo1NCArMDIwMCwgQXJkaGFuIE1hZHJhcyA8bmln aHRkZWNvZGVyQGdtYWlsLmNvbT4NCj4gd3JvdGU6DQo+DQo+PiAjaW5jbHVkZSA8c3lzL3R5cGVz Lmg+DQo+PiAjaW5jbHVkZSA8c3lzL3dhaXQuaD4NCj4+ICNpbmNsdWRlIDx1bmlzdGQuaD4NCj4+ ICNpbmNsdWRlIDxzdGRpby5oPg0KPj4gI2luY2x1ZGUgPHN0cmluZy5oPg0KPj4NCj4+IGludCBt YWluKHZvaWQpDQo+PiB7DQo+PiAgcGlkX3QgcGlkOw0KPj4gIGludCBmZHNbMl0sIHJldDsNCj4+ ICBjb25zdCBjaGFyICpzb3J0ID0gIi91c3IvYmluL3NvcnQiOw0KPg0KPiAic3RhdGljIGNvbnN0 IGNoYXIgc29ydFtdIiB3b3VsZCBiZSBiZXR0ZXIgSU1PLg0KPg0KPj4gIGNoYXIgKmFyZ3ZbMl0g PSB7ICJzb3J0IiwgTlVMTCB9Ow0KPg0KPiAic3RhdGljIGNvbnN0IGNoYXIgKmFyZ3ZbXSIgaXMg ZGVmaW5pdGx5IGJldHRlciBoZXJlIGFuZCBkb2VzIG5vdCBwcm9kdWNlDQo+IHdhcm5pbmdzLiAg WW91ciBjb2RlIGRpc2NhcmRzICJjb25zdCIgZnJvbSBwb2ludGVyIChhIHN0cmluZyBsaXRlcmFs KS4NCj4NCj4+ICByZXQgPSBwaXBlKGZkcyk7DQo+PiAgaWYgKHJldCA9PSAtMSkgew0KPj4gICAg cGVycm9yKCJwaXBlIik7DQo+PiAgICByZXR1cm4gLTE7DQo+PiAgfQ0KPj4gIHBpZCA9IGZvcmso KTsNCj4+ICBpZiAocGlkID09IC0xKSB7DQo+PiAgICBwZXJyb3IoImZvcmsiKTsNCj4+ICAgIHJl dHVybiAtMTsNCj4+ICB9DQo+DQo+IFBlcnNvbmFsbHkgSSBwcmVmZmVyIHNvbWV0aGluZyBsaWtl Og0KPg0KPiAgc3dpdGNoIChmb3JrKCkpIHsNCj4gIGNhc2UgLTE6IC8qIGVycm9yICovICBicmVh azsNCj4gIGNhc2UgIDA6IC8qIGNoaWxkICovICBicmVhazsNCj4gIGRlZmF1bHQ6IC8qIHBhcmVu dCAqLw0KPiAgfQ0KPg0KPiBidXQgc3VpdCB5b3Vyc2VsZi4NCj4NCj4+ICBpZiAocGlkID09IDAp IHsNCj4+ICAgIGludCByZXQ7DQo+DQo+IE5vIG5lZWQgdG8gZGVmaW5lIHRoaXMgdmFyaWFibGUg aGVyZS4gIFlvdSBhbHJlYWR5IGhhdmUgc3VjaCB2YXJpYWJsZS4NCj4NCj4+DQo+PiAgICBjbG9z ZShmZHNbMV0pOw0KPj4gICAgZHVwMihmZHNbMF0sIFNURElOX0ZJTEVOTyk7DQo+Pg0KPj4gICAg cmV0ID0gZXhlY3ZlKHNvcnQsIGFyZ3YsIE5VTEwpOw0KPj4gICAgaWYgKHJldCA9PSAtMSkgew0K Pj4gICAgICBwZXJyb3IoImV4ZWN2ZSIpOw0KPj4gICAgfQ0KPj4gICAgY2xvc2UoZmRzWzBdKTsN Cj4+ICAgIF9leGl0KDApOw0KPg0KPiBObyBuZWVkIHRvIGNsb3NlKCksIGFuZCBfZXhpdCgwKSBz aG91bGQgYmUgX2V4aXQoMSkgKG9yIC0xIGlmIHlvdSB3aWxsKQ0KPiBzaW5jZSB0aGUgY2hpbGVk IGZpbmlzaGVkIHdpdGggZXJyb3IuDQo+DQo+PiAgfQ0KPj4gIGVsc2Ugew0KPj4gICAgRklMRSAq c3RyZWFtOw0KPj4NCj4+ICAgIGNsb3NlKGZkc1swXSk7DQo+PiAgICBzdHJlYW0gPSBmZG9wZW4o ZmRzWzFdLCAidyIpOw0KPj4gICAgaWYgKCFzdHJlYW0pIHsNCj4+ICAgICAgcGVycm9yKCJmZG9w ZW4iKTsNCj4+ICAgICAgcmV0dXJuIC0xOw0KPj4gICAgfQ0KPj4gICAgZnByaW50ZihzdHJlYW0s ICJ0aGlzXG4iKTsNCj4+ICAgIGZwcmludGYoc3RyZWFtLCAibWVhbnNcbiIpOw0KPj4gICAgZnBy aW50ZihzdHJlYW0sICJ3YXJcbiIpOw0KPj4gICAgZmZsdXNoKHN0cmVhbSk7DQo+DQo+IEFuZCBo ZXJlLCByZXBsYWNlIGZmbHVzaCgpIHdpdGggZmNsb3NlKCkuICBJdCBzZWVtcywgZGF0YSBpcyBi dWZmZXJlZCBvbg0KPiBrZXJuZWwgbGV2ZWwsIG5vdCBvbmx5IGxpYmMgbGV2ZWwgYW5kIGZmbHVz aCgpIGNhbm5vdCBoYW5kbGUgdGhhdC4NCj4NCj4+ICAgIHdhaXRwaWQocGlkLCAmcmV0LCAwKTsN Cj4+ICAgIGNsb3NlKGZkc1sxXSk7DQo+DQo+IE5vIG5lZWQgdG8gY2xvc2UuDQo+DQo+PiAgfQ0K Pj4gIHJldHVybiAwOw0KPj4gfQ0KPg0KPiAtLQ0KPiBCZXN0IHJlZ2FyZHMsICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBfICAgICBfDQo+ICAuby4gfCBMaWVnZSBv ZiBTZXJlbmx5IEVubGlnaHRlbmVkIE1hamVzdHkgb2YgICAgICAgICBvJyBcLD0uLyBgbw0KPiAg Li5vIHwgQ29tcHV0ZXIgU2NpZW5jZSwgIE1pY2hhxYIgIm1pbmE4NiIgTmF6YXJld2ljeiAgICAg IChvIG8pDQo+ICBvb28gKy08bS5uYXphcmV3aWN6QHNhbXN1bmcuY29tPi08bWluYTg2QGphYmJl ci5vcmc+LW9vTy0tKF8pLS1Pb28tLQ0KPg0KPg0KLS0NClRvIHVuc3Vic2NyaWJlIGZyb20gdGhp cyBsaXN0OiBzZW5kIHRoZSBsaW5lICJ1bnN1YnNjcmliZSBsaW51eC1jLXByb2dyYW1taW5nIiBp bg0KdGhlIGJvZHkgb2YgYSBtZXNzYWdlIHRvIG1ham9yZG9tb0B2Z2VyLmtlcm5lbC5vcmcNCk1v cmUgbWFqb3Jkb21vIGluZm8gYXQgIGh0dHA6Ly92Z2VyLmtlcm5lbC5vcmcvbWFqb3Jkb21vLWlu Zm8uaHRtbA0KDQoNCg0KDQpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fDQpMaXN0ZW4gdG8gS05BQywgSGl0IHRoZSBIb21lIHBhZ2Ug YW5kIFR1bmUgSW4gTGl2ZSEgLS0tPiBodHRwOi8vd3d3LmtuYWMuY29t