check for and use C library provided strlcpy and strlcat

The musl-libc library provides implementations of strlcpy and strlcat,
so introduce a feature check for it and only use the kvmtool
implement

check for and use C library provided strlcpy and strlcat

The musl-libc library provides implementations of strlcpy and strlcat,
so introduce a feature check for it and only use the kvmtool
implementation if there is no library support for it.
This avoids clashes with the public definition.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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kvm tools: Use safe string handling functions

Use str[n|l] functions to make sure destination is
not overflowed.

Seems socket path generation should be moved into
a separate helper, but it's for an

kvm tools: Use safe string handling functions

Use str[n|l] functions to make sure destination is
not overflowed.

Seems socket path generation should be moved into
a separate helper, but it's for another patch.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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kvm tools: move strlcat() to util/strbuf.c

strlcat() is a string related function.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm tools: Use code from perf for argument processing

- parse-options.[ch] has argument processing code.

- types.h: Additional types for argument processing.

- strbuf.[ch]: Added a function prefix

kvm tools: Use code from perf for argument processing

- parse-options.[ch] has argument processing code.

- types.h: Additional types for argument processing.

- strbuf.[ch]: Added a function prefixcmp to compare string prefix

Signed-off-by: Prasad Joshi <prasadjoshi124@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

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