Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/string/fmtuid.c
1810 views
1
/***********************************************************************

2
*                                                                      *

3
*               This software is part of the ast package               *

4
*          Copyright (c) 1985-2011 AT&T Intellectual Property          *

5
*                      and is licensed under the                       *

6
*                 Eclipse Public License, Version 1.0                  *

7
*                    by AT&T Intellectual Property                     *

8
*                                                                      *

9
*                A copy of the License is available at                 *

10
*          http://www.eclipse.org/org/documents/epl-v10.html           *

11
*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

12
*                                                                      *

13
*              Information and Software Systems Research               *

14
*                            AT&T Research                             *

15
*                           Florham Park NJ                            *

16
*                                                                      *

17
*                 Glenn Fowler <[email protected]>                  *

18
*                  David Korn <[email protected]>                   *

19
*                   Phong Vo <[email protected]>                    *

20
*                                                                      *

21
***********************************************************************/

22
#pragma prototyped

23
/*

24
 * Glenn Fowler

25
 * AT&T Bell Laboratories

26
 *

27
 * uid number -> name

28
 */

29


30
#if defined(__STDPP__directive) && defined(__STDPP__hide)

31
__STDPP__directive pragma pp:hide getpwuid

32
#else

33
#define getpwuid	______getpwuid

34
#endif

35


36
#include <ast.h>

37
#include <cdt.h>

38
#include <pwd.h>

39


40
#if defined(__STDPP__directive) && defined(__STDPP__hide)

41
__STDPP__directive pragma pp:nohide getpwuid

42
#else

43
#undef	getpwuid

44
#endif

45


46
extern struct passwd*	getpwuid(uid_t);

47


48
typedef struct Id_s

49
{

50
	Dtlink_t	link;

51
	int		id;

52
	char		name[1];

53
} Id_t;

54


55
/*

56
 * return uid name given uid number

57
 */

58


59
char*

60
fmtuid(int uid)

61
{

62
	register Id_t*		ip;

63
	register char*		name;

64
	register struct passwd*	pw;

65
	int			z;

66


67
	static Dt_t*		dict;

68
	static Dtdisc_t		disc;

69


70
	if (!dict)

71
	{

72
		disc.key = offsetof(Id_t, id);

73
		disc.size = sizeof(int);

74
		dict = dtopen(&disc, Dtset);

75
	}

76
	else if (ip = (Id_t*)dtmatch(dict, &uid))

77
		return ip->name;

78
	if (pw = getpwuid(uid))

79
	{

80
		name = pw->pw_name;

81
#if _WINIX

82
		if (streq(name, "Administrator"))

83
			name = "root";

84
#endif

85
	}

86
	else if (uid == 0)

87
		name = "root";

88
	else

89
	{

90
		name = fmtbuf(z = sizeof(uid) * 3 + 1);

91
		sfsprintf(name, z, "%I*d", sizeof(uid), uid);

92
	}

93
	if (dict && (ip = newof(0, Id_t, 1, strlen(name))))

94
	{

95
		ip->id = uid;

96
		strcpy(ip->name, name);

97
		dtinsert(dict, ip);

98
		return ip->name;

99
	}

100
	return name;

101
}

102


103