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<H1><A NAME="SECTION001140000000000000000">10.4 Process information and control</A></H1>
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Programs such as <EM>ps</EM>, <EM>top</EM>, and <TT>free</TT> must have some way
to obtain information from the kernel about a processes and system
resources. Similarly, debuggers and other like tools need the ability
to control and inspect a running process. These features have been
provided by a number of interfaces by different versions of UNIX,
and nearly all of them are either machine-specific or tied to a
particular kernel design. So far, there has been no universally-accepted
interface for this kind of process-kernel interaction.
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<LI> <A NAME="tex2html2135" HREF="node145.html#SECTION001141000000000000000">10.4.1 <EM>kvm</EM> routines</A>
<LI> <A NAME="tex2html2136" HREF="node146.html#SECTION001142000000000000000">10.4.2 <EM>ptrace</EM> and the <EM>/proc</EM> filesystem</A>
<LI> <A NAME="tex2html2137" HREF="node147.html#SECTION001143000000000000000">10.4.3 Process control under Linux</A>
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