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glibc  2.9
seteuid.c File Reference
#include <errno.h>
#include <unistd.h>
#include <hurd.h>
#include <sys/types.h>
#include <hurd/id.h>
#include <string.h>

Go to the source code of this file.


int seteuid (uid_t uid)

Function Documentation

int seteuid ( uid_t  uid)

Definition at line 28 of file seteuid.c.

  auth_t newauth;
  error_t err;

  __mutex_lock (&_hurd_id.lock);
  err = _hurd_check_ids ();

  if (!err)
      /* Make a new auth handle which has EUID as the first element in the
         list of effective uids.  */

      if (_hurd_id.gen.nuids > 0)
         _hurd_id.gen.uids[0] = uid;
         _hurd_id.valid = 0;

      err = __USEPORT (AUTH, __auth_makeauth
                     (port, NULL, MACH_MSG_TYPE_COPY_SEND, 0,
                     _hurd_id.gen.nuids ? _hurd_id.gen.uids : &uid,
                     _hurd_id.gen.nuids ?: 1,
                     _hurd_id.aux.uids, _hurd_id.aux.nuids,
                     _hurd_id.gen.gids, _hurd_id.gen.ngids,
                     _hurd_id.aux.gids, _hurd_id.aux.ngids,
  __mutex_unlock (&_hurd_id.lock);

  if (err)
    return __hurd_fail (err);

  /* Install the new handle and reauthenticate everything.  */
  err = __setauth (newauth);
  __mach_port_deallocate (__mach_task_self (), newauth);
  return err;

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