int statvfs (const char *file, struct statvfs *buf)
{
struct statfs fsbuf;
struct stat st;
/* Get as much information as possible from the system. */
if (__libc_statfs (file, &fsbuf) < 0)
return -1;
#define STAT(st) stat (file, st)
#include "internal_statvfs.c"
/* We signal success if the statfs call succeeded. */
return 0;
}
/* Change the ownership and access permission of the slave pseudo
terminal associated with the master pseudo terminal specified
by FD. */
int grantpt (int fd)
{
struct statfs fsbuf;
char _buf[PATH_MAX];
char *buf = _buf;
if (pts_name (fd, &buf, sizeof (_buf)))
return -1;
if (__libc_statfs (buf, &fsbuf) < 0)
return -1;
/* If the slave pseudo terminal lives on a `devpts' filesystem, the
ownership and access permission are already set. */
if (fsbuf.f_type != DEVPTS_SUPER_MAGIC && fsbuf.f_type != DEVFS_SUPER_MAGIC)
return __unix_grantpt (fd);
return 0;
}
/* Open a master pseudo terminal and return its file descriptor. */
int
posix_openpt (int flags)
{
#define have_no_dev_ptmx (1<<0)
#define devpts_mounted (1<<1)
#if !defined __UNIX98PTY_ONLY__
static smallint _state;
#endif
int fd;
#if !defined __UNIX98PTY_ONLY__
if (!(_state & have_no_dev_ptmx))
#endif
{
fd = open (_PATH_DEVPTMX, flags);
if (fd != -1)
{
#if defined __ASSUME_DEVPTS__
return fd;
#else
struct statfs fsbuf;
/* Check that the /dev/pts filesystem is mounted
or if /dev is a devfs filesystem (this implies /dev/pts). */
if (
#if !defined __UNIX98PTY_ONLY__
(_state & devpts_mounted) ||
#endif
(__libc_statfs (_PATH_DEVPTS, &fsbuf) == 0
&& fsbuf.f_type == DEVPTS_SUPER_MAGIC)
|| (__libc_statfs (_PATH_DEV, &fsbuf) == 0
&& fsbuf.f_type == DEVFS_SUPER_MAGIC))
{
/* Everything is ok. */
#if !defined __UNIX98PTY_ONLY__
_state |= devpts_mounted;
#endif
return fd;
}
/* If /dev/pts is not mounted then the UNIX98 pseudo terminals
are not usable. */
close (fd);
#if !defined __UNIX98PTY_ONLY__
_state |= have_no_dev_ptmx;
#endif
#endif
}
else
{
#if !defined __UNIX98PTY_ONLY__
if (errno == ENOENT || errno == ENODEV)
_state |= have_no_dev_ptmx;
else
#endif
return -1;
}
}
#if !defined __UNIX98PTY_ONLY__ && defined __UCLIBC_HAS_GETPT__
/* If we have no ptmx then ignore flags and use the fallback. */
if (_state & have_no_dev_ptmx)
return __bsd_getpt();
#endif
return -1;
}
