1 mike 1.1.2.1 /*
2 //%2006////////////////////////////////////////////////////////////////////////
3 //
4 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
5 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
6 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
7 // IBM Corp.; EMC Corporation, The Open Group.
8 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
9 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
10 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
11 // EMC Corporation; VERITAS Software Corporation; The Open Group.
12 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
13 // EMC Corporation; Symantec Corporation; The Open Group.
14 //
15 // Permission is hereby granted, free of charge, to any person obtaining a copy
16 // of this software and associated documentation files (the "Software"), to
17 // deal in the Software without restriction, including without limitation the
18 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
19 // sell copies of the Software, and to permit persons to whom the Software is
20 // furnished to do so, subject to the following conditions:
21 //
22 mike 1.1.2.1 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
23 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
24 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
25 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
26 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
27 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 //
31 //%/////////////////////////////////////////////////////////////////////////////
32 */
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 #include <unistd.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <stdio.h>
39 #include "Defines.h"
40 #include "Fatal.h"
41 #include "Path.h"
42 #include "File.h"
43 mike 1.1.2.1 #include "Log.h"
44 #include "User.h"
45
46 /*
47 **==============================================================================
48 **
49 ** Child
50 **
51 ** The child process.
52 **
53 **==============================================================================
54 */
55
56 void Child(
57 int argc,
58 char** argv,
59 char path[EXECUTOR_BUFFER_SIZE],
60 int uid,
61 int gid,
62 int sock)
63 {
64 mike 1.1.2.1 char sockStr[EXECUTOR_BUFFER_SIZE];
65 char repositoryDir[EXECUTOR_BUFFER_SIZE];
66 char username[EXECUTOR_BUFFER_SIZE];
67 char** execArgv;
68
69 /* Build argument list, adding "-x <sock>" option if sock non-negative. */
70
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79 mike 1.1.2.1
80 /* Locate repository directory. */
81
82 if (LocateRepositoryDirectory(argc, argv, repositoryDir) != 0)
83 Fatal(FL, "failed to locate repository directory");
84
85 /* Check whether repository directory exists. */
86
87 if (AccessDir(repositoryDir) != 0)
88 Fatal(FL,
89 "failed to access repository directory: %s", repositoryDir);
90
91 /*
92 * Change ownership of Pegasus repository directory (it should be owned
93 * by same user that owns CIMSERVERMAIN).
94 */
95
96 ChangeDirOwnerRecursive(repositoryDir, uid, gid);
97
98 Log(LL_TRACE, "Pegasus repositoryDir is \"%s\"", repositoryDir);
99
100 mike 1.1.2.1 /*
101 * Downgrade privileges by setting the UID and GID of this process. Use
102 * the owner of the CIMSERVERMAIN program obtained above.
103 */
104
105 if (uid == 0 || gid == 0)
106 {
107 Fatal(FL, "root may not own %s since the program is run as owner",
108 path);
109 }
110
111 if (setgid(gid) != 0)
112 {
113 Fatal(FL, "Failed to set gid to %d", gid);
114 }
115
116 if (setuid(uid) != 0)
117 {
118 Fatal(FL, "Failed to set uid to %d", uid);
119 }
120
121 mike 1.1.2.1 if ((int)getuid() != uid ||
122 (int)geteuid() != uid ||
123 (int)getgid() != gid ||
124 (int)getegid() != gid)
125 {
126 Fatal(FL, "setuid/setgid verification failed\n");
127 }
128
129 /* Log user info. */
130
131 if (GetUserName(uid, username) != 0)
132 Fatal(FL, "cannot resolve user from uid=%d", uid);
133
134 Log(LL_TRACE, "%s running as %s (uid=%d, gid=%d)", CIMSERVERMAIN,
135 username, uid, gid);
136
137 /*
138 * Precheck that cimxml.socket is owned by cimservermain process. If
139 * not, then the bind would fail in the cimservermain process much
140 * later and the cause of the error would be difficult to determine.
141 */
142 mike 1.1.2.1
143 /* Flawfinder: ignore */
144 if (access(PEGASUS_LOCAL_DOMAIN_SOCKET_PATH, F_OK) == 0)
145 {
146 struct stat st;
147
148 if (stat(PEGASUS_LOCAL_DOMAIN_SOCKET_PATH, &st) != 0 ||
149 (int)st.st_uid != uid ||
150 (int)st.st_gid != gid)
151 {
152 Fatal(FL,
153 "cimservermain process cannot stat or does not own %s",
154 PEGASUS_LOCAL_DOMAIN_SOCKET_PATH);
155 }
156 }
157
158 /* Exec child process. */
159
160 /* Flawfinder: ignore */
161 if (execv(path, execArgv) != 0)
162 Fatal(FL, "failed to exec %s", path);
163 mike 1.1.2.1
164 exit(0);
165 }
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Child.c
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