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 * gid name -> number
28 */
29
30#if defined(__STDPP__directive) && defined(__STDPP__hide)
31__STDPP__directive pragma pp:hide getgrgid getgrnam getpwnam
32#else
33#define getgrgid	______getgrgid
34#define getgrnam	______getgrnam
35#define getpwnam	______getpwnam
36#endif
37
38#include <ast.h>
39#include <cdt.h>
40#include <pwd.h>
41#include <grp.h>
42
43#if defined(__STDPP__directive) && defined(__STDPP__hide)
44__STDPP__directive pragma pp:nohide getgrgid getgrnam getpwnam
45#else
46#undef	getgrgid
47#undef	getgrnam
48#undef	getpwnam
49#endif
50
51extern struct group*	getgrgid(gid_t);
52extern struct group*	getgrnam(const char*);
53extern struct passwd*	getpwnam(const char*);
54
55typedef struct Id_s
56{
57	Dtlink_t	link;
58	int		id;
59	char		name[1];
60} Id_t;
61
62/*
63 * return gid number given gid/uid name
64 * gid attempted first, then uid->pw_gid
65 * -1 on first error for a given name
66 * -2 on subsequent errors for a given name
67 */
68
69int
70strgid(const char* name)
71{
72	register Id_t*		ip;
73	register struct group*	gr;
74	register struct passwd*	pw;
75	int			id;
76	char*			e;
77
78	static Dt_t*		dict;
79	static Dtdisc_t		disc;
80
81	if (!dict)
82	{
83		disc.key = offsetof(Id_t, name);
84		dict = dtopen(&disc, Dthash);
85	}
86	else if (ip = (Id_t*)dtmatch(dict, name))
87		return ip->id;
88	if (gr = getgrnam(name))
89		id = gr->gr_gid;
90	else if (pw = getpwnam(name))
91		id = pw->pw_gid;
92	else
93	{
94		id = strtol(name, &e, 0);
95#if _WINIX
96		if (!*e)
97		{
98			if (!getgrgid(id))
99				id = -1;
100		}
101		else if (!streq(name, "sys"))
102			id = -1;
103		else if (gr = getgrnam("Administrators"))
104			id = gr->gr_gid;
105		else if (pw = getpwnam("Administrator"))
106			id = pw->pw_gid;
107		else
108			id = -1;
109#else
110		if (*e || !getgrgid(id))
111			id = -1;
112#endif
113	}
114	if (dict && (ip = newof(0, Id_t, 1, strlen(name))))
115	{
116		strcpy(ip->name, name);
117		ip->id = id >= 0 ? id : -2;
118		dtinsert(dict, ip);
119	}
120	return id;
121}
122