#include <sys/statvfs.h>
#include <sys/statfs.h>
#include "syscall.h"
#include "libc.h"

int __statfs(const char* path, struct statfs* buf) {
  *buf = (struct statfs){0};
#ifdef SYS_statfs64
  return syscall(SYS_statfs64, path, sizeof *buf, buf);
#else
  return syscall(SYS_statfs, path, buf);
#endif
}

int __fstatfs(int fd, struct statfs* buf) {
  *buf = (struct statfs){0};
#ifdef SYS_fstatfs64
  return syscall(SYS_fstatfs64, fd, sizeof *buf, buf);
#else
  return syscall(SYS_fstatfs, fd, buf);
#endif
}

weak_alias(__statfs, statfs);
weak_alias(__fstatfs, fstatfs);

static void fixup(struct statvfs* out, const struct statfs* in) {
  *out = (struct statvfs){0};
  out->f_bsize = in->f_bsize;
  out->f_frsize = in->f_frsize ? in->f_frsize : in->f_bsize;
  out->f_blocks = in->f_blocks;
  out->f_bfree = in->f_bfree;
  out->f_bavail = in->f_bavail;
  out->f_files = in->f_files;
  out->f_ffree = in->f_ffree;
  out->f_favail = in->f_ffree;
  out->f_fsid = in->f_fsid.__val[0];
  out->f_flag = in->f_flags;
  out->f_namemax = in->f_namelen;
}

int statvfs(const char* restrict path, struct statvfs* restrict buf) {
  struct statfs kbuf;
  if (__statfs(path, &kbuf) < 0)
    return -1;
  fixup(buf, &kbuf);
  return 0;
}

int fstatvfs(int fd, struct statvfs* buf) {
  struct statfs kbuf;
  if (__fstatfs(fd, &kbuf) < 0)
    return -1;
  fixup(buf, &kbuf);
  return 0;
}

weak_alias(__statfs, statfs64);
weak_alias(__fstatfs, fstatfs64);