1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
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
46extern struct passwd*	getpwuid(uid_t);
47
48typedef 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
59char*
60fmtuid(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, Dthash);
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