Document that kvm_open(3) also accepts "/dev/null" as a special
"corefile" argument, to access the running system via sysctl(3) if possible, thus not requring special setgid privileges.
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=127439
@ -36,7 +36,7 @@
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.\" @(#)kvm_open.3 8.3 (Berkeley) 4/19/94
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.\" $FreeBSD$
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.\"
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.Dd April 19, 1994
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.Dd January 29, 2004
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.Dt KVM_OPEN 3
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.Os
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.Sh NAME
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@ -78,7 +78,9 @@ as determined from
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.Pp
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The
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.Fa corefile
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argument is the kernel memory device file. It can be either /dev/mem
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argument is the kernel memory device file.
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It can be either
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.Pa /dev/mem
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or a crash dump core generated by
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.Xr savecore 8 .
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If
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@ -87,7 +89,14 @@ is
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.Dv NULL ,
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the default indicated by
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.Dv _PATH_MEM
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from <paths.h> is used.
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from
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.In paths.h
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is used.
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It can also be set to a special value
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.Pa /dev/null
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by utilities like
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.Xr ps 1
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that do not directly access kernel memory.
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.Pp
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The
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.Fa swapfile
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@ -190,4 +199,6 @@ left little choice.
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.Xr kvm_getprocs 3 ,
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.Xr kvm_nlist 3 ,
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.Xr kvm_read 3 ,
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.Xr kvm_write 3
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.Xr kvm_write 3 ,
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.Xr kmem 4 ,
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.Xr mem 4
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