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/* |
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* Copyright (c) 1990 Jan-Simon Pendry |
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine |
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* Copyright (c) 1990, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Jan-Simon Pendry at Imperial College, London. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* from: @(#)info_passwd.c 8.1 (Berkeley) 6/6/93 |
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* $Id: info_passwd.c,v 1.10 2015/12/05 21:15:01 mmcc Exp $ |
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*/ |
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/* |
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* Get info from password "file" |
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* |
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* This is experimental and probably doesn't |
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* do what you expect. |
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*/ |
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#include "am.h" |
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#include <pwd.h> |
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#define PASSWD_MAP "/etc/passwd" |
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/* |
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* Nothing to probe - check the map name is PASSWD_MAP. |
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*/ |
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int |
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passwd_init(char *map, time_t *tp) |
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{ |
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*tp = 0; |
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return strcmp(map, PASSWD_MAP) == 0 ? 0 : ENOENT; |
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} |
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/* |
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* Grab the entry via the getpwname routine |
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* Modify time is ignored by passwd - XXX |
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*/ |
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int |
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passwd_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp) |
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{ |
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struct passwd *pw; |
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char *dir = 0; |
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if (strcmp(key, "/defaults") == 0) { |
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*pval = strdup("type:=nfs"); |
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return 0; |
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} |
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pw = getpwnam(key); |
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if (pw) { |
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/* |
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* We chop the home directory up as follows: |
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* /anydir/dom1/dom2/dom3/user |
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* |
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* and return |
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* rfs:=/anydir/dom3;rhost:=dom3.dom2.dom1;sublink:=user |
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* |
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* This allows cross-domain entries in your passwd file. |
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* ... but forget about security! |
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*/ |
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char val[MAXPATHLEN], rhost[MAXHOSTNAMELEN]; |
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char *user, *p, *q; |
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dir = strdup(pw->pw_dir); |
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/* |
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* Find user name. If no / then Invalid... |
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*/ |
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user = strrchr(dir, '/'); |
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if (!user) |
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goto enoent; |
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*user++ = '\0'; |
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/* |
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* Find start of host "path". If no / then Invalid... |
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*/ |
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p = strchr(dir+1, '/'); |
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if (!p) |
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goto enoent; |
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*p++ = '\0'; |
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/* |
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* At this point, p is dom1/dom2/dom3 |
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* Copy, backwards, into rhost replacing |
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* / with . |
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*/ |
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rhost[0] = '\0'; |
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do { |
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q = strrchr(p, '/'); |
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if (q) { |
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strlcat(rhost, q + 1, sizeof(rhost)); |
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strlcat(rhost, ".", sizeof(rhost)); |
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*q = '\0'; |
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} else { |
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strlcat(rhost, p, sizeof(rhost)); |
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} |
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} while (q); |
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/* |
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* Sanity check |
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*/ |
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if (*rhost == '\0' || *user == '\0' || *dir == '\0') |
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goto enoent; |
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/* |
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* Make up return string |
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*/ |
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q = strchr(rhost, '.'); |
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if (q) |
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*q = '\0'; |
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snprintf(val, sizeof(val), |
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"rfs:=%s/%s;rhost:=%s;sublink:=%s;fs:=${autodir}%s", |
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dir, rhost, rhost, user, pw->pw_dir); |
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free(dir); |
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if (q) |
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*q = '.'; |
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*pval = strdup(val); |
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return 0; |
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} |
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enoent: |
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free(dir); |
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return ENOENT; |
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} |