source: rtems/cpukit/libcsupport/src/getlogin.c @ 1c6926c1

5
Last change on this file since 1c6926c1 was a2e3f33, checked in by Sebastian Huber <sebastian.huber@…>, on 07/24/13 at 11:50:54

score: Create object implementation header

Move implementation specific parts of object.h and object.inl into new
header file objectimpl.h. The object.h contains now only the
application visible API.
  • Property mode set to 100644
File size: 1.0 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief Get User Name
5 *  @ingroup libcsupport
6 */
7
8#if HAVE_CONFIG_H
9#include "config.h"
10#endif
11
12#include <limits.h>
13#include <string.h>
14#include <sys/types.h>
15#include <errno.h>
16
17#include <rtems/system.h>
18#include <rtems/seterr.h>
19#include <rtems/userenv.h>
20
21#include <unistd.h>
22#include <pwd.h>
23
24/**
25 *  4.2.4 Get User Name, P1003.1b-1993, p. 87
26 *
27 *  @note P1003.1c/D10, p. 49 adds getlogin_r().
28 */
29char *getlogin( void )
30{
31  (void) getlogin_r( _POSIX_types_Getlogin_buffer, LOGIN_NAME_MAX );
32  return _POSIX_types_Getlogin_buffer;
33}
34
35/**
36 *  4.2.4 Get User Name, P1003.1b-1993, p. 87
37 *
38 *  @note P1003.1c/D10, p. 49 adds getlogin_r().
39 */
40int getlogin_r(
41  char   *name,
42  size_t  namesize
43)
44{
45  struct passwd *pw;
46  char          *pname;
47
48  if ( !name )
49    return EFAULT;
50
51  if ( namesize < LOGIN_NAME_MAX )
52    return ERANGE;
53
54  /* Set the pointer to a default name */
55  pname = "";
56
57  pw = getpwuid(getuid());
58  if ( pw )
59   pname = pw->pw_name;
60
61  strncpy( name, pname, LOGIN_NAME_MAX );
62  return 0;
63}
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