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*                  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 name -> number
28 */
29
30#if defined(__STDPP__directive) && defined(__STDPP__hide)
31__STDPP__directive pragma pp:hide getpwnam getpwuid
32#else
33#define getpwnam	______getpwnam
34#define getpwuid	______getpwuid
35#endif
36
37#include <ast.h>
38#include <cdt.h>
39#include <pwd.h>
40
41#if defined(__STDPP__directive) && defined(__STDPP__hide)
42__STDPP__directive pragma pp:nohide getpwnam getpwuid
43#else
44#undef	getpwnam
45#undef	getpwuid
46#endif
47
48extern struct passwd*	getpwnam(const char*);
49extern struct passwd*	getpwuid(uid_t);
50
51typedef struct Id_s
52{
53	Dtlink_t	link;
54	int		id;
55	char		name[1];
56} Id_t;
57
58/*
59 * return uid number given uid name
60 * -1 on first error for a given name
61 * -2 on subsequent errors for a given name
62 */
63
64int
65struid(const char* name)
66{
67	register Id_t*		ip;
68	register struct passwd*	pw;
69	int			id;
70	char*			e;
71
72	static Dt_t*		dict;
73	static Dtdisc_t		disc;
74
75	if (!dict)
76	{
77		disc.key = offsetof(Id_t, name);
78		dict = dtopen(&disc, Dthash);
79	}
80	else if (ip = (Id_t*)dtmatch(dict, name))
81		return ip->id;
82	if (pw = getpwnam(name))
83		id = pw->pw_uid;
84	else
85	{
86		id = strtol(name, &e, 0);
87#if _WINIX
88		if (!*e)
89		{
90			if (!getpwuid(id))
91				id = -1;
92		}
93		else if (streq(name, "root") && (pw = getpwnam("Administrator")))
94			id = pw->pw_uid;
95		else
96			id = -1;
97#else
98		if (*e || !getpwuid(id))
99			id = -1;
100#endif
101	}
102	if (dict && (ip = newof(0, Id_t, 1, strlen(name))))
103	{
104		strcpy(ip->name, name);
105		ip->id = id >= 0 ? id : -2;
106		dtinsert(dict, ip);
107	}
108	return id;
109}
110