Prompt username/password on stderr so:
Prompt username/password on stderr so:

     pg_dump -o -u some_db >dump_file

works.

foyzur/gpdb,rubikloud/gpdb,techdragon/Postgres-XL,cjcjameson/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,cjcjameson/gpdb,chrishajas/gpdb,ashwinstar/gpdb,Postgres-XL/Postgres-XL,zaksoup/gpdb,rvs/gpdb,zaksoup/gpdb,Chibin/gpdb,chrishajas/gpdb,chrishajas/gpdb,oberstet/postgres-xl,xinzweb/gpdb,Quikling/gpdb,kaknikhil/gpdb,postmind-net/postgres-xl,atris/gpdb,lintzc/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,50wu/gpdb,rvs/gpdb,50wu/gpdb,0x0FFF/gpdb,Quikling/gpdb,edespino/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,0x0FFF/gpdb,lisakowen/gpdb,arcivanov/postgres-xl,ahachete/gpdb,jmcatamney/gpdb,tangp3/gpdb,royc1/gpdb,tpostgres-projects/tPostgres,lintzc/gpdb,lpetrov-pivotal/gpdb,lpetrov-pivotal/gpdb,Quikling/gpdb,ahachete/gpdb,jmcatamney/gpdb,rvs/gpdb,foyzur/gpdb,0x0FFF/gpdb,snaga/postgres-xl,randomtask1155/gpdb,xuegang/gpdb,edespino/gpdb,atris/gpdb,xinzweb/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,50wu/gpdb,janebeckman/gpdb,techdragon/Postgres-XL,rvs/gpdb,arcivanov/postgres-xl,chrishajas/gpdb,rvs/gpdb,lisakowen/gpdb,ashwinstar/gpdb,postmind-net/postgres-xl,royc1/gpdb,janebeckman/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,tangp3/gpdb,rvs/gpdb,tangp3/gpdb,royc1/gpdb,Chibin/gpdb,chrishajas/gpdb,50wu/gpdb,foyzur/gpdb,50wu/gpdb,kmjungersen/PostgresXL,atris/gpdb,oberstet/postgres-xl,tangp3/gpdb,Postgres-XL/Postgres-XL,edespino/gpdb,arcivanov/postgres-xl,kaknikhil/gpdb,jmcatamney/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,jmcatamney/gpdb,cjcjameson/gpdb,atris/gpdb,kaknikhil/gpdb,lintzc/gpdb,postmind-net/postgres-xl,chrishajas/gpdb,rvs/gpdb,foyzur/gpdb,edespino/gpdb,xinzweb/gpdb,xuegang/gpdb,50wu/gpdb,greenplum-db/gpdb,ovr/postgres-xl,janebeckman/gpdb,lpetrov-pivotal/gpdb,randomtask1155/gpdb,techdragon/Postgres-XL,50wu/gpdb,ovr/postgres-xl,rubikloud/gpdb,rubikloud/gpdb,janebeckman/gpdb,kaknikhil/gpdb,kmjungersen/PostgresXL,cjcjameson/gpdb,oberstet/postgres-xl,randomtask1155/gpdb,yazun/postgres-xl,lisakowen/gpdb,Quikling/gpdb,janebeckman/gpdb,lintzc/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,atris/gpdb,chrishajas/gpdb,yuanzhao/gpdb,foyzur/gpdb,0x0FFF/gpdb,techdragon/Postgres-XL,adam8157/gpdb,randomtask1155/gpdb,lintzc/gpdb,tpostgres-projects/tPostgres,zaksoup/gpdb,foyzur/gpdb,randomtask1155/gpdb,CraigHarris/gpdb,yuanzhao/gpdb,lintzc/gpdb,zaksoup/gpdb,atris/gpdb,snaga/postgres-xl,kaknikhil/gpdb,xinzweb/gpdb,jmcatamney/gpdb,Chibin/gpdb,Quikling/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,janebeckman/gpdb,Postgres-XL/Postgres-XL,kaknikhil/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,tangp3/gpdb,CraigHarris/gpdb,snaga/postgres-xl,zaksoup/gpdb,rvs/gpdb,lintzc/gpdb,edespino/gpdb,Quikling/gpdb,adam8157/gpdb,rubikloud/gpdb,edespino/gpdb,xinzweb/gpdb,edespino/gpdb,royc1/gpdb,ahachete/gpdb,tangp3/gpdb,Chibin/gpdb,rvs/gpdb,Quikling/gpdb,0x0FFF/gpdb,Chibin/gpdb,CraigHarris/gpdb,kmjungersen/PostgresXL,greenplum-db/gpdb,Chibin/gpdb,yazun/postgres-xl,zaksoup/gpdb,kaknikhil/gpdb,rvs/gpdb,Chibin/gpdb,ovr/postgres-xl,yazun/postgres-xl,tangp3/gpdb,edespino/gpdb,pavanvd/postgres-xl,lpetrov-pivotal/gpdb,lisakowen/gpdb,xuegang/gpdb,ovr/postgres-xl,ashwinstar/gpdb,yuanzhao/gpdb,xuegang/gpdb,postmind-net/postgres-xl,lisakowen/gpdb,tangp3/gpdb,oberstet/postgres-xl,yazun/postgres-xl,janebeckman/gpdb,ashwinstar/gpdb,edespino/gpdb,greenplum-db/gpdb,ahachete/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,snaga/postgres-xl,tpostgres-projects/tPostgres,janebeckman/gpdb,kaknikhil/gpdb,zeroae/postgres-xl,ashwinstar/gpdb,tpostgres-projects/tPostgres,xinzweb/gpdb,techdragon/Postgres-XL,ahachete/gpdb,rubikloud/gpdb,adam8157/gpdb,adam8157/gpdb,foyzur/gpdb,rubikloud/gpdb,lisakowen/gpdb,ahachete/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,oberstet/postgres-xl,xuegang/gpdb,arcivanov/postgres-xl,zaksoup/gpdb,xuegang/gpdb,atris/gpdb,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,randomtask1155/gpdb,cjcjameson/gpdb,CraigHarris/gpdb,zaksoup/gpdb,randomtask1155/gpdb,xinzweb/gpdb,royc1/gpdb,greenplum-db/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,ovr/postgres-xl,pavanvd/postgres-xl,yazun/postgres-xl,50wu/gpdb,xuegang/gpdb,edespino/gpdb,ahachete/gpdb,lisakowen/gpdb,tpostgres-projects/tPostgres,jmcatamney/gpdb,foyzur/gpdb,rubikloud/gpdb,lintzc/gpdb,adam8157/gpdb,zeroae/postgres-xl,ahachete/gpdb,randomtask1155/gpdb,xinzweb/gpdb,janebeckman/gpdb,zeroae/postgres-xl,adam8157/gpdb,lisakowen/gpdb,kaknikhil/gpdb,royc1/gpdb,CraigHarris/gpdb,Chibin/gpdb,snaga/postgres-xl,janebeckman/gpdb,atris/gpdb,cjcjameson/gpdb,Quikling/gpdb,cjcjameson/gpdb,zeroae/postgres-xl,Chibin/gpdb,Quikling/gpdb,zeroae/postgres-xl,royc1/gpdb,Quikling/gpdb,CraigHarris/gpdb,ashwinstar/gpdb,royc1/gpdb,chrishajas/gpdb,0x0FFF/gpdb,yuanzhao/gpdb,postmind-net/postgres-xl,CraigHarris/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,lpetrov-pivotal/gpdb,CraigHarris/gpdb,arcivanov/postgres-xl,lpetrov-pivotal/gpdb,Chibin/gpdb,rubikloud/gpdb,lintzc/gpdb,0x0FFF/gpdb,lpetrov-pivotal/gpdb,xuegang/gpdb,xuegang/gpdb