2 * Copyright (c) 1997-2014 Erez Zadok
3 * Copyright (c) 1990 Jan-Simon Pendry
4 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1990 The Regents of the University of California.
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * File: am-utils/amd/info_passwd.c
41 * Get info from password "file"
43 * This is experimental and probably doesn't do what you expect.
48 #endif /* HAVE_CONFIG_H */
52 #define PASSWD_MAP "/etc/passwd"
54 /* forward declarations */
55 int passwd_init(mnt_map *m, char *map, time_t *tp);
56 int passwd_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
60 * Nothing to probe - check the map name is PASSWD_MAP.
63 passwd_init(mnt_map *m, char *map, time_t *tp)
68 * Recognize the old format "PASSWD_MAP"
69 * Uses default return string
70 * "type:=nfs;rfs:=/${var0}/${var1};rhost:=${var1};sublink:=${var2};fs:=${autodir}${var3}"
72 if (STREQ(map, PASSWD_MAP))
75 * Recognize the new format "PASSWD_MAP:pval-format"
77 if (!NSTREQ(map, PASSWD_MAP, sizeof(PASSWD_MAP) - 1))
79 if (map[sizeof(PASSWD_MAP)-1] != ':')
87 * Grab the entry via the getpwname routine
88 * Modify time is ignored by passwd - XXX
91 passwd_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
96 if (STREQ(key, "/defaults")) {
97 *pval = xstrdup("type:=nfs");
104 * We chop the home directory up as follows:
105 * /anydir/dom1/dom2/dom3/user
108 * rfs:=/anydir/dom3;rhost:=dom3.dom2.dom1;sublink:=user
110 * var0:=pw-prefix:=anydir
111 * var1:=pw-rhost:=dom3.dom2.dom1
112 * var2:=pw-user:=user
113 * var3:=pw-home:=/anydir/dom1/dom2/dom3/user
115 * This allows cross-domain entries in your passwd file.
116 * ... but forget about security!
120 char val[MAXPATHLEN];
121 char rhost[MAXHOSTNAMELEN];
122 dir = xstrdup(pw->pw_dir);
125 * Find user name. If no / then Invalid...
127 user = strrchr(dir, '/');
133 * Find start of host "path". If no / then Invalid...
135 p = strchr(dir + 1, '/');
141 * At this point, p is dom1/dom2/dom3
142 * Copy, backwards, into rhost replacing
149 xstrlcat(rhost, q + 1, sizeof(rhost));
150 xstrlcat(rhost, ".", sizeof(rhost));
153 xstrlcat(rhost, p, sizeof(rhost));
160 if (*rhost == '\0' || *user == '\0' || *dir == '\0')
164 * Make up return string
166 q = strchr(rhost, '.');
169 p = strchr(map, ':');
173 p = "type:=nfs;rfs:=/${var0}/${var1};rhost:=${var1};sublink:=${var2};fs:=${autodir}${var3}";
174 xsnprintf(val, sizeof(val), "var0:=%s;var1:=%s;var2:=%s;var3:=%s;%s",
175 dir+1, rhost, user, pw->pw_dir, p);
176 dlog("passwd_search: map=%s key=%s -> %s", map, key, val);
179 *pval = xstrdup(val);