/*
  Copyright 2024 Northern.tech AS

  This file is part of CFEngine 3 - written and maintained by Northern.tech AS.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

  To the extent this program is licensed as part of the Enterprise
  versions of CFEngine, the applicable Commercial Open Source License
  (COSL) may apply to this file if you as a licensee so wish it. See
  included file COSL.txt.
*/

#ifndef CFENGINE_PLATFORM_H
#define CFENGINE_PLATFORM_H

/*
 * Platform-specific definitions and declarations.
 *
 * INCLUDE THIS HEADER ALWAYS FIRST in order to define appropriate macros for
 * including system headers (such as _FILE_OFFSET_BITS).
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#define _GNU_SOURCE 1

#ifdef _WIN32
# define MAX_FILENAME 227
# define WINVER 0x501
# if defined(__CYGWIN__)
#  undef FD_SETSIZE
# endif
  /* Increase select(2) FD limit from 64. It's documented and valid to do it
   * like that provided that we define it *before* including winsock2.h. */
# define FD_SETSIZE 4096
#else
# define MAX_FILENAME 254
#endif

#ifdef __MINGW32__
# include <winsock2.h>
# include <windows.h>
# include <accctrl.h>
# include <aclapi.h>
# include <psapi.h>
# include <wchar.h>
# include <sddl.h>
# include <tlhelp32.h>
# include <iphlpapi.h>
# include <ws2tcpip.h>
# include <objbase.h>           // for disphelper
# ifndef SHUT_RDWR              // for shutdown()
#  define SHUT_RDWR SD_BOTH
# endif
#endif

/* Standard C. */
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <stddef.h>                                     /* offsetof, size_t */

/* POSIX but available in all platforms. */
#include <strings.h>
#include <limits.h>

#ifdef HAVE_SYS_SYSMACROS_H
# include <sys/sysmacros.h>
#endif

#include <sys/types.h>
#include <sys/stat.h>

/* We now require a pthreads implementation. */
#include <pthread.h>

#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif

#ifdef HAVE_UNAME
# include <sys/utsname.h>
#else
# define _SYS_NMLN       257

struct utsname
{
    char sysname[_SYS_NMLN];
    char nodename[_SYS_NMLN];
    char release[_SYS_NMLN];
    char version[_SYS_NMLN];
    char machine[_SYS_NMLN];
};

#endif

#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif

#ifdef HAVE_INTTYPES_H
# include <inttypes.h>
#endif

#ifdef HAVE_SYS_SYSTEMINFO_H
# include <sys/systeminfo.h>
#endif

#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif

#ifdef HAVE_SYS_MOUNT_H
# include <sys/mount.h>
#endif

#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#ifndef WEXITSTATUS
# define WEXITSTATUS(s) ((unsigned)(s) >> 8)
#endif
#ifndef WIFEXITED
# define WIFEXITED(s) (((s) & 255) == 0)
#endif
#ifndef WIFSIGNALED
# define WIFSIGNALED(s) ((s) & 0)       /* Can't use for BSD */
#endif
#ifndef WTERMSIG
# define WTERMSIG(s) ((s) & 0)
#endif

#include <stdbool.h>

#include <errno.h>

#ifdef HAVE_DIRENT_H
# include <dirent.h>
#else
# define dirent direct
# if HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif
# if HAVE_NDIR_H
#  include <ndir.h>
# endif
#endif

#ifndef PATH_MAX
# ifdef _MAX_PATH
#  define PATH_MAX _MAX_PATH
# else
#  define PATH_MAX 4096
# endif
#endif

#include <signal.h>

#ifdef __MINGW32__
# define LOG_LOCAL0      (16<<3)
# define LOG_LOCAL1      (17<<3)
# define LOG_LOCAL2      (18<<3)
# define LOG_LOCAL3      (19<<3)
# define LOG_LOCAL4      (20<<3)
# define LOG_LOCAL5      (21<<3)
# define LOG_LOCAL6      (22<<3)
# define LOG_LOCAL7      (23<<3)
# define LOG_USER        (1<<3)
# define LOG_DAEMON      (3<<3)

/* MinGW added this flag only in latest version. */
# ifndef IPV6_V6ONLY
#  define IPV6_V6ONLY 27
# endif

// Not available in MinGW headers unless you raise WINVER and _WIN32_WINNT, but
// that is very badly supported in MinGW ATM.
ULONGLONG WINAPI GetTickCount64(void);

#else /* !__MINGW32__ */
# include <syslog.h>
#endif

#ifdef _AIX
# ifndef ps2
#  include <sys/statfs.h>
# endif

# include <sys/systemcfg.h>
#endif

#ifdef __sun
# include <sys/statvfs.h>
# undef nfstype

#include <sys/mkdev.h>

#ifndef timersub
# define timersub(a, b, result)                             \
    do                                                      \
    {                                                       \
           (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;    \
           (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
           if ((result)->tv_usec < 0)                       \
           {                                                \
               --(result)->tv_sec;                          \
               (result)->tv_usec += 1000000;                \
           }                                                \
    } while (0)
#endif

#endif

#if !HAVE_DECL_DIRFD
int dirfd(DIR *dirp);
#endif

/* strndup is defined as a macro on many systems */
#if !HAVE_DECL_STRNDUP
# ifndef strndup
char *strndup(const char *s, size_t n);
# endif
#endif

#if !HAVE_DECL_STRNLEN
size_t strnlen(const char *str, size_t maxlen);
#endif

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#if !HAVE_DECL_STRLCPY
size_t strlcpy(char *destination, const char *source, size_t size);
#endif

#if !HAVE_DECL_STRLCAT
size_t strlcat(char *destination, const char *source, size_t size);
#endif

#if !HAVE_DECL_STRSEP
char *strsep(char **stringp, const char *delim);
#endif

#if !HAVE_DECL_SOCKETPAIR
int socketpair(int domain, int type, int protocol, int sv[2]);
#endif

#if !HAVE_DECL_FSYNC
int fsync(int fd);
#endif

#if !HAVE_DECL_GLOB
#define GLOB_NOSPACE 1
#define GLOB_ABORTED 2
#define GLOB_NOMATCH 3
typedef struct {
    size_t   gl_pathc;    /* Count of paths matched so far  */
    char   **gl_pathv;    /* List of matched pathnames.  */
    size_t   gl_offs;
} glob_t;
int glob(const char *pattern,
         int flags,
         int (*errfunc) (const char *epath, int eerrno),
         glob_t *pglob);
void globfree(glob_t *pglob);
#endif

#ifdef __APPLE__
# include <sys/malloc.h>
# include <sys/paths.h>
#endif

#ifdef HAVE_SYS_MALLOC_H
# ifdef __APPLE__
#  include <sys/malloc.h>
#  include <sys/paths.h>
# endif
#else
# ifdef HAVE_MALLOC_H
#  ifndef __OpenBSD__
#   ifdef __FreeBSD__
#    include <stdlib.h>
#   else
#    include <malloc.h>
#   endif
#  endif
# endif
#endif

// from https://www.gnu.org/software/autoconf/manual/autoconf-2.60/html_node/Particular-Functions.html
#if HAVE_ALLOCA_H
# include <alloca.h>
#elif defined __GNUC__
# define alloca __builtin_alloca
#elif defined _AIX
# define alloca __alloca
#elif defined _MSC_VER
# include <malloc.h>
# define alloca _alloca
#else
# include <stddef.h>
# ifdef  __cplusplus
extern "C"
# endif
void *alloca (size_t);
#endif

#include <fcntl.h>

#ifdef HAVE_VFS_H
# include <sys/vfs.h>
#endif

#ifdef __hpux
# include <sys/dirent.h>
#endif

#ifdef HAVE_UTIME_H
# include <utime.h>             /* use utime not utimes for portability */
#else /* HAVE_UTIME_H */
  /* All current systems provide time.h; it need not be checked for.
   * Not all systems provide sys/time.h, but those that do, all allow
   * you to include it and time.h simultaneously. */
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# endif /* HAVE_SYS_TIME_H */
# include <time.h>
#endif /* HAVE_UTIME */

#ifdef HAVE_TIME_H
# include <time.h>
#endif

#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif

#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif

#ifndef __MINGW32__
# include <pwd.h>
# include <grp.h>
#endif

#ifdef HAVE_SYS_SOCKIO_H
# include <sys/sockio.h>
#endif

/*
  Work around bug in HPUX system headers:
  "/usr/include/machine/sys/getppdp.h:65: error: array type has incomplete element type"
*/
#ifdef __hpux
union mpinfou
{
    int dummy;
};
#endif

#ifndef __MINGW32__
# include <sys/socket.h>
# include <sys/ioctl.h>
# include <net/if.h>
# include <netinet/in.h>
# include <netinet/in_systm.h>
# include <netinet/ip.h>
# include <netinet/tcp.h>
# include <arpa/inet.h>
# include <netdb.h>
# if !defined __linux__ && !defined _WIN32
#  include <sys/protosw.h>
#  undef sgi
#  include <net/route.h>
# endif
#endif

#ifdef __linux__
# ifdef HAVE_NET_ROUTE_H
#  include <net/route.h>
# else
#  include <linux/route.h>
# endif

# ifdef HAVE_NETINET_IN_H
#  include <netinet/in.h>
# else
#  include <linux/in.h>
# endif

# ifdef HAVE_NETINET_IP_H
#  include <netinet/ip.h>
# else
#  include <linux/ip.h>
# endif
#endif

#ifdef __linux__
#define ARG_LINUX_ONLY
#else
#define ARG_LINUX_ONLY ARG_UNUSED
#endif

#ifndef CLOCK_REALTIME
# define CLOCK_REALTIME 1
#endif

#include <clockid_t.h>

#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif

# ifndef _SC_THREAD_STACK_MIN
#  define _SC_THREAD_STACK_MIN PTHREAD_STACK_MIN
#endif

#ifndef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
#  define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP PTHREAD_MUTEX_INITIALIZER
#endif

#ifdef HAVE_ENDIAN_H
# include <endian.h>
#endif

#if !HAVE_DECL_LE32TOH
static inline uint32_t ByteSwap32(uint32_t le32uint)
{
    uint32_t be32uint;
    unsigned char *le_ptr = (unsigned char *)&le32uint;
    unsigned char *be_ptr = (unsigned char *)&be32uint;
    be_ptr[0] = le_ptr[3];
    be_ptr[1] = le_ptr[2];
    be_ptr[2] = le_ptr[1];
    be_ptr[3] = le_ptr[0];
    return be32uint;
}
# ifdef WORDS_BIGENDIAN
#  ifndef le32toh
#   define le32toh(x) ByteSwap32(x)
#  endif
#  ifndef htole32
#   define htole32(x) ByteSwap32(x)
#  endif
# else
#  ifndef le32toh
#   define le32toh(x) (x)
#  endif
#  ifndef htole32
#   define htole32(x) (x)
#  endif
# endif
#endif // !HAVE_DECL_LE32TOH

#if !HAVE_DECL_CLOSEFROM
int closefrom(int fd);
#endif

#if !HAVE_DECL_PTHREAD_ATTR_SETSTACKSIZE
int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
#endif

#ifdef HAVE_SCHED_H
# include <sched.h>
#endif

#if defined(HAVE_SYS_XATTR_H)
# include <sys/xattr.h>
#elif defined(HAVE_ATTR_XATTR_H)
# include <attr/xattr.h>
#endif

#ifndef MIN
# define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif

#ifndef MAX
# define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif

#ifndef INADDR_NONE
# define INADDR_NONE ((unsigned long int) 0xffffffff)
#endif
#ifndef HAVE_SETEGID
int setegid(gid_t gid);
#endif
#if !HAVE_DECL_UNAME
int uname(struct utsname *buf);
#endif
#if !HAVE_DECL_GETUID
uid_t getuid(void);
#endif
#if !HAVE_DECL_GETGID
gid_t getgid(void);
#endif
#if !HAVE_DECL_FGETGRENT
struct group *fgetgrent(FILE *stream);
#endif
#if !HAVE_DECL_DRAND48
double drand48(void);
#endif
#if !HAVE_DECL_SRAND48
void srand48(long seed);
#endif
#if !HAVE_DECL_CLOCK_GETTIME
int clock_gettime(clockid_t clock_id, struct timespec *tp);
#endif

#if !HAVE_DECL_REALPATH
    /**
     * WARNING realpath() has varying behaviour among platforms.
     *  - Do not use it to convert relative paths to absolute
     *    (Solaris under certain conditions will return relative path).
     *  - Do not use it to check existence of file
     *    (on *BSD the last component of the path may not exist).
     * Use it only to resolve all symlinks and canonicalise filename,
     * i.e. remove double '/' and "/./" and "/../".
     *
     * @TODO what we need is a resolvepath(2) cross-platform implementation.
     */
#    if defined (__MINGW32__)
#        define realpath(N,R) _fullpath((R), (N), PATH_MAX)
#    endif
#endif

#if !HAVE_DECL_LSTAT
int lstat(const char *file_name, struct stat *buf);
#endif
#if !HAVE_DECL_SLEEP
unsigned int sleep(unsigned int seconds);
#endif
#if !HAVE_DECL_ROUND
double round(double x);
#endif
#if !HAVE_DECL_NANOSLEEP
int nanosleep(const struct timespec *req, struct timespec *rem);
#endif
#if !HAVE_DECL_CHOWN
int chown(const char *path, uid_t owner, gid_t group);
#endif
#if !HAVE_DECL_FCHMOD
int fchmod(int fd, mode_t mode);
#endif

#if !HAVE_DECL_GETNETGRENT
int getnetgrent(char **host, char **user, char **domain);
#endif

#if !HAVE_DECL_SETNETGRENT
#if SETNETGRENT_RETURNS_INT
int setnetgrent(const char *netgroup);
#else
void setnetgrent(const char *netgroup);
#endif
#endif

#if !HAVE_DECL_ENDNETGRENT
#if ENDNETGRENT_RETURNS_INT
int endnetgrent(void);
#else
void endnetgrent(void);
#endif
#endif

#if !HAVE_DECL_STRSTR
char *strstr(const char *haystack, const char *needle);
#endif
#if !HAVE_DECL_STRCASESTR
char *strcasestr(const char *haystack, const char *needle);
#endif
#if !HAVE_DECL_STRCASECMP
int strcasecmp(const char *s1, const char *s2);
#endif
#if !HAVE_DECL_STRNCASECMP
int strncasecmp(const char *s1, const char *s2, size_t n);
#endif
#if !HAVE_DECL_STRSIGNAL
char *strsignal(int sig);
#endif
#if !HAVE_DECL_STRDUP
char *strdup(const char *str);
#endif
#if !HAVE_DECL_MEMRCHR
void *memrchr(const void *s, int c, size_t n);
#endif
#if !HAVE_DECL_MEMDUP
void *memdup(const void *mem, size_t size);
#endif
#if !HAVE_DECL_MEMMEM
void *memmem(const void *haystack, size_t haystacklen,
             const void *needle, size_t needlelen);
#endif
#if !HAVE_DECL_STRERROR
char *strerror(int err);
#endif
#if !HAVE_DECL_UNSETENV
int unsetenv(const char *name);
#endif
#ifndef HAVE_SETEUID
int seteuid(uid_t euid);
#endif
#ifndef HAVE_SETEUID
int setegid(gid_t egid);
#endif
#if !HAVE_DECL_SETLINEBUF
void setlinebuf(FILE *stream);
#endif

#if HAVE_STDARG_H
# include <stdarg.h>
# if !HAVE_VSNPRINTF
int rpl_vsnprintf(char *, size_t, const char *, va_list);
/* If [v]snprintf() does not exist or is not C99 compatible, then we assume
 * that [v]printf() and [v]fprintf() need to be provided as well. */
int rpl_vprintf(const char *format, va_list ap);
int rpl_vfprintf(FILE *stream, const char *format, va_list ap);
# endif
# if !HAVE_SNPRINTF
int rpl_snprintf(char *, size_t, const char *, ...);
int rpl_printf(const char *format, ...);
int rpl_fprintf(FILE *stream, const char *format, ...);
# endif
# if !HAVE_VASPRINTF
int rpl_vasprintf(char **, const char *, va_list);
# endif
# if !HAVE_ASPRINTF
int rpl_asprintf(char **, const char *, ...);
# endif
#endif /* HAVE_STDARG_H */

/* For example Solaris, does not have isfinite() in <math.h>. */
#if !HAVE_DECL_ISFINITE && defined(HAVE_IEEEFP_H)
# include <ieeefp.h>
# define isfinite(x) finite(x)
#endif

#if !HAVE_DECL_GETLINE
ssize_t getline(char **lineptr, size_t *n, FILE *stream);
#endif
#if !HAVE_DECL_STRCHRNUL
char *strchrnul(const char *s, int c);
#endif
#if !HAVE_DECL_GMTIME_R
struct tm *gmtime_r(const time_t *timep, struct tm *result);
#endif
#if !HAVE_DECL_LOCALTIME_R
struct tm *localtime_r(const time_t *timep, struct tm *result);
#endif
#if !HAVE_DECL_CHMOD
int chmod(const char *path, mode_t mode);
#endif
#if !HAVE_DECL_ALARM
unsigned int alarm(unsigned int seconds);
#endif
#if !HAVE_DECL_MKDTEMP
char *mkdtemp(char *template);
#endif
#if !HAVE_DECL_STRRSTR
char *strrstr(const char *haystack, const char *needle);
#endif
#if !HAVE_DECL_STPNCPY
char *stpncpy(char *dst, const char *src, size_t len);
#endif
#if !HAVE_DECL_INET_NTOP
const char *inet_ntop(int af, const void *src, char *dst, socklen_t size);
#endif
#if !HAVE_DECL_INET_PTON
int inet_pton(int af, const char *src, void *dst);
#endif
#if !HAVE_DECL_GETADDRINFO
int getaddrinfo(const char *node, const char *service,
                const struct addrinfo *hints, struct addrinfo **res);
void freeaddrinfo(struct addrinfo *res);
int getnameinfo(const struct sockaddr *sa, socklen_t salen,
                char *node, socklen_t nodelen,
                char *service, socklen_t servicelen, int flags);
const char *gai_strerror(int errcode);
#endif
#if !HAVE_STRUCT_SOCKADDR_STORAGE
    #ifdef AF_INET6
        #define sockaddr_storage sockaddr_in6
    #else
        #define sockaddr_storage sockaddr
    #endif
#endif
#ifndef AF_INET6
    /* if the platform doesn't have it, it's useless, but define it as -1
     * since we need it in our code... */
    #define AF_INET6 -1
#endif
#ifndef AI_NUMERICSERV
    /* Not portable to MinGW so don't use it. */
    #define AI_NUMERICSERV -1
#endif

#if !defined(HAVE_MKDIR_PROPER)
int rpl_mkdir(const char *pathname, mode_t mode);
#endif

#if !defined(HAVE_STAT_PROPER)
int rpl_stat(const char *path, struct stat *buf);
#define _stat64(name, st) rpl_stat(name, st)
#endif

#if !defined(HAVE_RENAME_PROPER)
int rpl_rename(const char *oldpath, const char *newpath);
#endif

#if !defined(HAVE_CTIME_PROPER)
char *rpl_ctime(const time_t *t);
#endif

#ifndef NGROUPS
# define NGROUPS 20
#endif

#if !HAVE_DECL_OPENAT
int openat(int dirfd, const char *pathname, int flags, ...);
#endif
#if !HAVE_DECL_FSTATAT
int fstatat(int dirfd, const char *pathname, struct stat *buf, int flags);
#endif
#if !HAVE_DECL_FCHOWNAT
int fchownat(int dirfd, const char *pathname, uid_t owner, gid_t group, int flags);
#endif
#if !HAVE_DECL_FCHMODAT
int fchmodat(int dirfd, const char *pathname, mode_t mode, int flags);
#endif
#if !HAVE_DECL_READLINKAT
int readlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz);
#endif
#ifndef AT_SYMLINK_NOFOLLOW
#define AT_SYMLINK_NOFOLLOW 0x1000
#endif
#ifndef AT_FDCWD
#define AT_FDCWD (-2)
#endif

#if !HAVE_DECL_LOG2
double log2(double x);
#endif

/*******************************************************************/
/*  Windows                                                        */
/*******************************************************************/

#ifdef __MINGW32__
# define MAXHOSTNAMELEN 256     // always adequate: http://msdn.microsoft.com/en-us/library/ms738527(VS.85).aspx

// as seen in in_addr struct in winsock.h
typedef u_long in_addr_t;

// shold be in winnt.h, but is not in current MinGW version
# ifndef VER_SUITE_WH_SERVER
#  define VER_SUITE_WH_SERVER 0x00008000
# endif

/* Dummy signals, can be set to anything below 23 but
 * 2, 4, 8, 11, 15, 21, 22 which are taken.
 * Calling signal() with anything from below causes SIG_ERR
 * to be returned.                                         */

# define SIGALRM 1
# define SIGHUP 3
# define SIGTRAP 5
# define SIGKILL 6
# define SIGPIPE 7
# define SIGCONT 9
# define SIGSTOP 10
# define SIGQUIT 12
# define SIGCHLD 13
# define SIGUSR1 14
# define SIGUSR2 16
# define SIGBUS 17

# if !defined( _TIMESPEC_DEFINED) && !defined(HAVE_STRUCT_TIMESPEC)
#  define HAVE_STRUCT_TIMESPEC 1
struct timespec
{
    long tv_sec;
    long tv_nsec;
};
# endif/* NOT _TIMESPEC_DEFINED */

#endif /* __MINGW32__ */

#ifndef ERESTARTSYS
# define ERESTARTSYS EINTR
#endif

#ifndef EOPNOTSUPP
# define EOPNOTSUPP EINVAL
#endif

#ifndef ENOTSUPP
# define ENOTSUPP EINVAL
#endif

#ifndef ENOLINK
// Should be well outside the range of any errno value.
// Will never actually be returned by any function on a platform that doesn't support it.
# define ENOLINK 123456
#endif

/*******************************************************************/
/* Copy file defines                                               */
/*******************************************************************/

/**
 * DEV_BSIZE is 512 for most common platforms
 *           (Linux, AIX on Power, Solaris etc).
 *
 * Exceptions:
 *             HP-UX:       1024
 *             AIX on PS/2: 4096
 *             Windows:     undefined
 */
#ifndef DEV_BSIZE                       /* usually defined in <sys/param.h> */
# ifdef BSIZE
#  define DEV_BSIZE BSIZE
# else
#  define DEV_BSIZE 512
# endif
#endif

/**
   Extract or fake data from a `struct stat'.
   ST_BLKSIZE: Optimal I/O blocksize for the file, in bytes.
               This is tightly coupled to ST_NBLOCKS, i.e it must stand that
               (s.st_size <= ST_NBLOCKS(s) * ST_BLKSIZE(s))
   ST_NBLOCKS: Number of blocks in the file, **in ST_BLKSIZE units**
               WARNING this is different than "stat.st_nblocks" on most systems
   ST_NBYTES : "disk usage" of the file on the disk, **in bytes**.

   TODO on Windows here is how to get the "cluster size" i.e. the block size:
   - send IOCTL_DISK_GET_DRIVE_GEOMETRY_EX and use Geometry.BytesPerSector
     from DISK_GEOMETRY_EX structure
   - To check if a file is sparse: File.GetAttributes().SparseFile
*/

/*
 * Known platforms that don't have stat.st_blocks:
 *   Windows (MinGW)
 */
#ifndef HAVE_STRUCT_STAT_ST_BLOCKS


# define ST_BLKSIZE(statbuf)    DEV_BSIZE
# define ST_NBLOCKS(statbuf)    (((statbuf).st_size + DEV_BSIZE - 1) / DEV_BSIZE)
# define ST_NBYTES(statbuf)     (ST_NBLOCKS(statbuf) * DEV_BSIZE)


#else  /* HAVE_STRUCT_STAT_ST_BLOCKS */
  /* Some systems, like Sequents, return st_blksize of 0 on pipes. */
# define ST_BLKSIZE(statbuf) ((statbuf).st_blksize > 0 \
                               ? (statbuf).st_blksize : DEV_BSIZE)
# define ST_NBLOCKS(statbuf) ((ST_NBYTES(statbuf) + ST_BLKSIZE(statbuf) - 1) \
                              / ST_BLKSIZE(statbuf))

# if defined(_CRAY)
#  define ST_NBYTES(statbuf) ((statbuf).st_blocks * ST_BLKSIZE(statbuf))
# else
   /* ======= DEFAULT ============================== */
   /* Most OS give stat.st_blocks in DEV_BSIZE units */
#  define ST_NBYTES(statbuf) ((statbuf).st_blocks * DEV_BSIZE)
   /* ============================================== */
# endif /* CRAY */


#endif /* HAVE_STRUCT_STAT_ST_BLOCKS */


#ifndef SEEK_CUR
# define SEEK_CUR 1
#endif

/*******************************************************************/
/* Ultrix/BSD don't have all these from sys/stat.h                 */
/*******************************************************************/

#ifndef S_IFBLK
# define S_IFBLK 0060000
#endif
#ifndef S_IFCHR
# define S_IFCHR 0020000
#endif
#ifndef S_IFDIR
# define S_IFDIR 0040000
#endif
#ifndef S_IFIFO
# define S_IFIFO 0010000
#endif
#ifndef S_IFREG
# define S_IFREG 0100000
#endif
#ifndef S_IFLNK
# define S_IFLNK 0120000
#endif
#ifndef S_IFSOCK
# define S_IFSOCK 0140000
#endif
#ifndef S_IFMT
# define S_IFMT  00170000
#endif

#ifndef S_ISREG
# define S_ISREG(m)      (((m) & S_IFMT) == S_IFREG)
#endif
#ifndef S_ISDIR
# define S_ISDIR(m)      (((m) & S_IFMT) == S_IFDIR)
#endif
#ifndef S_ISLNK
# define S_ISLNK(m)      (((m) & S_IFMT) == S_IFLNK)
#endif
#ifndef S_ISFIFO
# define S_ISFIFO(m)     (((m) & S_IFMT) == S_IFIFO)
#endif
#ifndef S_ISCHR
# define S_ISCHR(m)      (((m) & S_IFMT) == S_IFCHR)
#endif
#ifndef S_ISBLK
# define S_ISBLK(m)      (((m) & S_IFMT) == S_IFBLK)
#endif
#ifndef S_ISSOCK
# define S_ISSOCK(m)     (((m) & S_IFMT) == S_IFSOCK)
#endif

#ifndef S_IRUSR
# define S_IRWXU 00700
# define S_IRUSR 00400
# define S_IWUSR 00200
# define S_IXUSR 00100
#endif

#ifndef S_IRGRP
# define S_IRWXG 00070
# define S_IRGRP 00040
# define S_IWGRP 00020
# define S_IXGRP 00010
#endif

#ifndef S_IROTH
# define S_IRWXO 00007
# define S_IROTH 00004
# define S_IWOTH 00002
# define S_IXOTH 00001
#endif

/* kill(2) on OS X returns ETIMEDOUT instead of ESRCH */
#ifndef ETIMEDOUT
# define ETIMEDOUT ESRCH
#endif

/* For getnameinfo(). */
#ifndef  NI_MAXHOST
# define NI_MAXHOST 1025
#endif

/********************************************************************/
/* *BSD chflags stuff -                                             */
/********************************************************************/

#if !defined UF_NODUMP
# define UF_NODUMP 0
#endif
#if !defined UF_IMMUTABLE
# define UF_IMMUTABLE 0
#endif
#if !defined UF_APPEND
# define UF_APPEND 0
#endif
#if !defined UF_OPAQUE
# define UF_OPAQUE 0
#endif
#if !defined UF_NOUNLINK
# define UF_NOUNLINK 0
#endif
#if !defined SF_ARCHIVED
# define SF_ARCHIVED 0
#endif
#if !defined SF_IMMUTABLE
# define SF_IMMUTABLE 0
#endif
#if !defined SF_APPEND
# define SF_APPEND 0
#endif
#if !defined SF_NOUNLINK
# define SF_NOUNLINK 0
#endif
#define CHFLAGS_MASK  ( UF_NODUMP | UF_IMMUTABLE | UF_APPEND | UF_OPAQUE | UF_NOUNLINK | SF_ARCHIVED | SF_IMMUTABLE | SF_APPEND | SF_NOUNLINK )

/* For cygwin32 */

#if !defined O_BINARY
# define O_BINARY 0
#endif

#if !defined O_TEXT
# define O_TEXT 0
#endif

#if defined(__MINGW32__)
/* _mkdir(3) */
# include <direct.h>
#endif


/* Some shorthands. */

# if defined(__sun) && !defined(sun)
#  define sun
# endif

# if defined(__SVR4) && !defined(SVR4)
#  define SVR4
# endif

# if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
#  define SUNOS_5
# endif

#include <condition_macros.h>

/* Must be always the last one! */
#include <deprecated.h>
#include <config.post.h>


#endif  /* CFENGINE_PLATFORM_H */
