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These headers are not available on Windows. <bsd/sys/cdefs.h> ensures
that __has_include() and __has_include_next() are defined.
Signed-off-by: Guillem Jover <guillem@hadrons.org>

Signed-off-by: Guillem Jover <guillem@hadrons.org>

<io.h> provides the necessary file I/O functions.

[guillem@hadrons.org: Move include before <hashinc>. ]
Signed-off-by: Guillem Jover <guillem@hadrons.org>

This is only used in the overlay test and Windows does not provide it.
Signed-off-by: Guillem Jover <guillem@hadrons.org>

Windows doesn't provide S_ISVTX. Prefer not defining it rather than
defining it to something invalid.
Signed-off-by: Guillem Jover <guillem@hadrons.org>

<sys/param.h> is not available on Windows.
Signed-off-by: Guillem Jover <guillem@hadrons.org>

This fixes a regression caused by 2d7de186. These types are not available
on all systems.

Fixes: commit 2d7de186Signed-off-by: Guillem Jover <guillem@hadrons.org>

The loop only executes while len > 0, and the trinary operator in the
function argument is checking against len >= 1 which will always be
true.

Warned-by: coverity

The code uses an internal helper function to avoid code repetition. But
to get there, the function takes a pointer to a pointer, so that the few
functions that require returning an allocated buffer can get hold of it
this way.

The problem is that the user might pass a NULL pointer and trigger an
internal allocation even if the functions are not expected to do so.

Add a new internal helper for non-allocations, that will assert that
condition, and make any other function that requires this behavior call
this one instead.

Warned-by: coverity

Commit 993828d8 (Add flopenat() function from FreeBSD) dropped the
fcntl.h header. This breaks the build with musl libc:

flopen.c: In function ‘vflopenat’:
flopen.c:60:14: error: ‘O_CREAT’ undeclared (first use in this function)
  if (flags & O_CREAT) {
              ^~~~~~~

Restore the fcntl.h header include to fix the build.

Fixes: commit 993828d8Submitted-also-by: parazyd <parazyd@dyne.org>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Guillem Jover <guillem@hadrons.org>

Merge all stages so that we do not need to pass artifacts around.
Quiesce «apt install».

Run «apt install» in non-interactive mode, and do not install
Recommends. Replace build-essential, which is rather fat, with gcc
and make. Execute autogen instead of autoreconf directly.

Signed-off-by: Guillem Jover <guillem@hadrons.org>

Signed-off-by: Guillem Jover <guillem@hadrons.org>

The NetBSD implementations have different prototypes to the ones coming
from OpenBSD, which will break builds, and have caused segfaults at
run-time. We provide now both interfaces with different prototypes as
different version nodes allow selecting them at compile-time, defaulting
for now to the OpenBSD one to avoid build-time breakage, while emitting
a compile-time warning. Later on, in 0.10.0, we will be switching the
compile-time default to the NetBSD version.

Ref: http://gnats.netbsd.org/44977
Fixes: https://bugs.debian.org/899282

We need this to be able to select different version symbols at
compile-time.

We cannot refer to a License short-name if that is not on its own
License paragraph. Split several other common License fields into
their own paragraphs to avoid this problem in the future.

This function has the same problems as fgetln() which is already marked
as deprecated.

Import from OpenBSD.

Import from NetBSD.

This will slightly reduce the delta, and makes it easier to compare the
sources.

Implements HN_IEC_PREFIXES.

Use EINVAL instead of EDOOFUS. Add a missing synopsis for
pidfile_fileno() in the man page. Move the definition of struct pidfh
from libutil.h into pidfile.c following upstream change.

Split Linux support into its own header separate from the generic Unix
to fix a Linux-specific issue with clone(). Reset rsp to NULL on failure.

Includes changes to handle the Linux syscall blocking when there is not
enough entropy during boot, by switching it to non-blocking mode and
falling back to the alternative implementations. Man page URL reference
fixes. Build fixes for Mac OS X.

Fixes: https://bugs.debian.org/898088

uClibc defines EM_OR1K instead of EM_OPENRISC for the OpenRISC ELF
e_machine ID. Use EM_OR1K when EM_OPENRISC is not defined.

This fixes the following build failure:

In file included from nlist.c:44:0:
nlist.c: In function ‘__elf_is_okay__’:
local-elf.h:224:23: error: ‘EM_OPENRISC’ undeclared (first use in this function)
 #define ELF_TARG_MACH EM_OPENRISC
                       ^
nlist.c:77:26: note: in expansion of macro ‘ELF_TARG_MACH’
   if (ehdr->e_machine == ELF_TARG_MACH &&
                          ^
Signed-off-by: Guillem Jover <guillem@hadrons.org>

On non-glibc based systems we cannot unconditionally use the
__GLIBC_PREREQ macro as it gets expanded before evaluation. Instead,
if it is undefined, define it to 0.

We should also always declare these functions on non-glibc based
systems. And on systems with a new enough glibc, which provides these
functions, we should still provide the declarations if _GNU_SOURCE
is *not* defined.
Reported-by: Jörg Krause <joerg.krause@embedded.rocks>

This is a non-portable header, and we should not assume it is present.
Let the first system header pull it in if needed.