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Command: kvm_write | Section: 3 | Source: MINIX | File: kvm_write.3
KVM_READ(3) FreeBSD Library Functions Manual KVM_READ(3)
NAME
kvm_read, kvm_write - read or write kernel virtual memory
LIBRARY
Kernel Data Access Library (libkvm, -lkvm)
SYNOPSIS
#include <kvm.h>
ssize_t
kvm_read(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
ssize_t
kvm_write(kvm_t *kd, u_long addr, const void *buf, size_t nbytes);
DESCRIPTION
The kvm_read() and kvm_write() functions are used to read and write
kernel virtual memory (or a crash dump file). See kvm_open(3) or
kvm_openfiles(3) for information regarding opening kernel virtual memory
and crash dumps.
The kvm_read() function transfers nbytes bytes of data from the kernel
space address addr to buf. Conversely, kvm_write() transfers data from
buf to addr. Unlike their SunOS counterparts, these functions cannot be
used to read or write process address spaces.
RETURN VALUES
Upon success, the number of bytes actually transferred is returned.
Otherwise, -1 is returned.
SEE ALSO
kvm(3), kvm_close(3), kvm_getargv(3), kvm_getenvv(3), kvm_geterr(3),
kvm_getprocs(3), kvm_nlist(3), kvm_open(3), kvm_openfiles(3)
FreeBSD 14.1-RELEASE-p8 June 4, 1993 FreeBSD 14.1-RELEASE-p8