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 <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
51 extern struct group* getgrgid(gid_t);
52 extern struct group* getgrnam(const char*);
53 extern struct passwd* getpwnam(const char*);
54
55 typedef 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
69 int
strgid(const char * name)70 strgid(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, Dtset);
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