/*
 * Minimal portability layer for system call differences between
 * Capsicum OSes.
 */
#ifndef __SYSCALLS_H__
#define __SYSCALLS_H__

/* Map umount2 (Linux) syscall to unmount (FreeBSD) syscall */
#define umount2(T, F) unmount(T, F)

/* Map sighandler_y (Linux) to sig_t (FreeBSD) */
#define sighandler_t sig_t

/* profil(2) has a first argument of char* */
#define profil_arg1_t char

/* FreeBSD has getdents(2) available */
#include <sys/types.h>
#include <dirent.h>
inline int getdents_(unsigned int fd, void *dirp, unsigned int count) {
  return getdents(fd, (char*)dirp, count);
}
#include <sys/mman.h>
inline int mincore_(void *addr, size_t length, unsigned char *vec) {
  return mincore(addr, length, (char*)vec);
}
#define getpid_ getpid

/* Map Linux-style sendfile to FreeBSD sendfile */
#include <sys/socket.h>
#include <sys/uio.h>
inline ssize_t sendfile_(int out_fd, int in_fd, off_t *offset, size_t count) {
  return sendfile(in_fd, out_fd, *offset, count, NULL, offset, 0);
}

/* A sample mount(2) call */
#include <sys/param.h>
#include <sys/mount.h>
inline int bogus_mount_() {
  return mount("procfs", "/not_mounted", 0, NULL);
}

/* Mappings for extended attribute functions */
#include <sys/extattr.h>
#include <errno.h>
static const char *fbsd_extattr_skip_prefix(const char *p) {
  if (*p++ == 'u' && *p++ == 's' && *p++ == 'e' && *p++ == 'r' && *p++ == '.')
    return p;
  errno = EINVAL;
  return NULL;
}
inline ssize_t flistxattr_(int fd, char *list, size_t size) {
  return extattr_list_fd(fd, EXTATTR_NAMESPACE_USER, list, size);
}
inline ssize_t fgetxattr_(int fd, const char *name, void *value, size_t size) {
  if (!(name = fbsd_extattr_skip_prefix(name)))
    return -1;
  return extattr_get_fd(fd, EXTATTR_NAMESPACE_USER, name, value, size);
}
inline int fsetxattr_(int fd, const char *name, const void *value, size_t size, int) {
  if (!(name = fbsd_extattr_skip_prefix(name)))
    return -1;
  return extattr_set_fd(fd, EXTATTR_NAMESPACE_USER, name, value, size);
}
inline int fremovexattr_(int fd, const char *name) {
  if (!(name = fbsd_extattr_skip_prefix(name)))
    return -1;
  return extattr_delete_fd(fd, EXTATTR_NAMESPACE_USER, name);
}

/* mq_* functions are wrappers in FreeBSD so go through to underlying syscalls */
#include <sys/syscall.h>
extern "C" {
extern int __sys_kmq_notify(int, const struct sigevent *);
extern int __sys_kmq_open(const char *, int, mode_t, const struct mq_attr *);
extern int __sys_kmq_setattr(int, const struct mq_attr *__restrict, struct mq_attr *__restrict);
extern ssize_t __sys_kmq_timedreceive(int, char *__restrict, size_t,
                                      unsigned *__restrict, const struct timespec *__restrict);
extern int __sys_kmq_timedsend(int, const char *, size_t, unsigned,
                               const struct timespec *);
extern int  __sys_kmq_unlink(const char *);
}
#define mq_notify_ __sys_kmq_notify
#define mq_open_ __sys_kmq_open
#define mq_setattr_ __sys_kmq_setattr
#define mq_getattr_(A, B) __sys_kmq_setattr(A, NULL, B)
#define mq_timedreceive_ __sys_kmq_timedreceive
#define mq_timedsend_ __sys_kmq_timedsend
#define mq_unlink_ __sys_kmq_unlink
#define mq_close_ close
#include <sys/ptrace.h>
inline long ptrace_(int request, pid_t pid, void *addr, void *data) {
  return ptrace(request, pid, (caddr_t)addr, static_cast<int>((long)data));
}
#define PTRACE_PEEKDATA_ PT_READ_D
#define getegid_ getegid
#define getgid_ getgid
#define geteuid_ geteuid
#define getuid_ getuid
#define getgroups_ getgroups
#define getrlimit_ getrlimit
#define bind_ bind
#define connect_ connect

/* Features available */
#define HAVE_CHFLAGSAT
#define HAVE_BINDAT
#define HAVE_CONNECTAT
#define HAVE_CHFLAGS
#define HAVE_GETFSSTAT
#define HAVE_REVOKE
#define HAVE_GETLOGIN
#define HAVE_MKFIFOAT
#define HAVE_SYSARCH
#include <machine/sysarch.h>
#define HAVE_STAT_BIRTHTIME
#define HAVE_SYSCTL
#define HAVE_FPATHCONF
#define HAVE_F_DUP2FD
#define HAVE_PSELECT
#define HAVE_SCTP

/* FreeBSD only allows root to call mlock[all]/munlock[all] */
#define MLOCK_REQUIRES_ROOT 1
/* FreeBSD effectively only allows root to call sched_setscheduler */
#define SCHED_SETSCHEDULER_REQUIRES_ROOT 1

#endif /*__SYSCALLS_H__*/