1 /*
2 * Copyright (c) 1990 Jan-Simon Pendry
3 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Jan-Simon Pendry at Imperial College, London.
9 *
10 * %sccs.include.redist.c%
11 *
12 * @(#)info_passwd.c 8.1 (Berkeley) 06/06/93
13 *
14 * $Id: info_passwd.c,v 5.2.2.1 1992/02/09 15:08:33 jsp beta $
15 *
16 */
17
18 /*
19 * Get info from password "file"
20 *
21 * This is experimental and probably doesn't
22 * do what you expect.
23 */
24
25 #include "am.h"
26
27 #ifdef HAS_PASSWD_MAPS
28 #include <pwd.h>
29
30 #define PASSWD_MAP "/etc/passwd"
31
32 /*
33 * Nothing to probe - check the map name is PASSWD_MAP.
34 */
35 int passwd_init P((char *map, time_t *tp));
passwd_init(map,tp)36 int passwd_init(map, tp)
37 char *map;
38 time_t *tp;
39 {
40 *tp = 0;
41 return strcmp(map, PASSWD_MAP) == 0 ? 0 : ENOENT;
42 }
43
44
45 /*
46 * Grab the entry via the getpwname routine
47 * Modify time is ignored by passwd - XXX
48 */
49 int passwd_search P((mnt_map *m, char *map, char *key, char **pval, time_t *tp));
passwd_search(m,map,key,pval,tp)50 int passwd_search(m, map, key, pval, tp)
51 mnt_map *m;
52 char *map;
53 char *key;
54 char **pval;
55 time_t *tp;
56 {
57 char *dir = 0;
58 struct passwd *pw;
59 if (strcmp(key, "/defaults") == 0) {
60 *pval = strdup("type:=nfs");
61 return 0;
62 }
63
64 pw = getpwnam(key);
65 if (pw) {
66 /*
67 * We chop the home directory up as follows:
68 * /anydir/dom1/dom2/dom3/user
69 *
70 * and return
71 * rfs:=/anydir/dom3;rhost:=dom3.dom2.dom1;sublink:=user
72 *
73 * This allows cross-domain entries in your passwd file.
74 * ... but forget about security!
75 */
76 char *user;
77 char *p, *q;
78 char val[MAXPATHLEN];
79 char rhost[MAXHOSTNAMELEN];
80 dir = strdup(pw->pw_dir);
81 /*
82 * Find user name. If no / then Invalid...
83 */
84 user = strrchr(dir, '/');
85 if (!user)
86 goto enoent;
87 *user++ = '\0';
88 /*
89 * Find start of host "path". If no / then Invalid...
90 */
91 p = strchr(dir+1, '/');
92 if (!p)
93 goto enoent;
94 *p++ = '\0';
95 /*
96 * At this point, p is dom1/dom2/dom3
97 * Copy, backwards, into rhost replacing
98 * / with .
99 */
100 rhost[0] = '\0';
101 do {
102 q = strrchr(p, '/');
103 if (q) {
104 strcat(rhost, q + 1);
105 strcat(rhost, ".");
106 *q = '\0';
107 } else {
108 strcat(rhost, p);
109 }
110 } while (q);
111 /*
112 * Sanity check
113 */
114 if (*rhost == '\0' || *user == '\0' || *dir == '\0')
115 goto enoent;
116 /*
117 * Make up return string
118 */
119 q = strchr(rhost, '.');
120 if (q)
121 *q = '\0';
122 sprintf(val, "rfs:=%s/%s;rhost:=%s;sublink:=%s;fs:=${autodir}%s",
123 dir, rhost, rhost, user, pw->pw_dir);
124 if (q)
125 *q = '.';
126 *pval = strdup(val);
127 return 0;
128 }
129
130 enoent:
131 if (dir)
132 free(dir);
133
134 return ENOENT;
135 }
136 #endif /* HAS_PASSWD_MAPS */
137