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June 2003

39 participants
32 discussions

is read() evil in usermode?
by Raúl Gutiérrez Segalés 02 Jun '03

02 Jun '03

Hi, I am writing, done actually, a littl app that carries on a few things that I ask it to do. There is a point where I need my app to wait till I press any key so it can keep moving. I tried with getchar, even doing fflush(stdin) first, but the app goes right throught it, it seems like something forces a bypass over getchar, so I decided to try read() and wait for 1 character. It works great.. but is it elegant and convenient to use a system call for a usermode app ? Shouldnt I use a library wrapper? What glibc function should I use to wait for a return(enter) or any other key to be pressed? This is C. Thanks, Raul

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Fwd: rdmsr and wrmsr library
by Jung Woon Ho 01 Jun '03

01 Jun '03

Hi, I'm trying to use the instructions rdmsr, wrmsr, rdpmc from the user level. However these instructions have to be run with the previlege level 0. Is there any patch available that installs simple system calls that would allow me to read and write to the msr(model specific register) from the user level? _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus

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