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glibc  2.9
Functions
faccessat.c File Reference
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <unistd.h>
#include <sys/types.h>
#include <hurd.h>
#include <hurd/fd.h>

Go to the source code of this file.

Functions

int faccessat (int fd, const char *file, int type, int flag)

Function Documentation

int faccessat ( int  fd,
const char *  file,
int  type,
int  flag 
)

Definition at line 29 of file faccessat.c.

{
  error_t err;
  file_t port;
  int allowed, flags;

  if ((flag & AT_EACCESS) == 0)
    {
      if (fd == AT_FDCWD || file[0] == '/')
       return __access (file, type);
      __set_errno (ENOTSUP);       /* XXX later */
      return -1;
    }

  port = __file_name_lookup_at (fd, flag &~ AT_EACCESS, file, 0, 0);
  if (port == MACH_PORT_NULL)
    return -1;

  /* Find out what types of access we are allowed to this file.  */
  err = __file_check_access (port, &allowed);
  __mach_port_deallocate (__mach_task_self (), port);
  if (err)
    return __hurd_fail (err);

  flags = 0;
  if (type & R_OK)
    flags |= O_READ;
  if (type & W_OK)
    flags |= O_WRITE;
  if (type & X_OK)
    flags |= O_EXEC;

  if (flags & ~allowed)
    /* We are not allowed all the requested types of access.  */
    return __hurd_fail (EACCES);

  return 0;
}

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