1 /*
2 * Copyright (c) 1995 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifdef HAVE_CONFIG_H
35 #include <config.h>
36 #endif
37
38 RCSID("$Id$");
39
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <unistd.h>
44 #ifdef HAVE_SYS_TYPES_H
45 #include <sys/types.h>
46 #endif
47 #include <time.h>
48 #ifdef HAVE_FCNTL_H
49 #include <fcntl.h>
50 #endif
51 #ifdef HAVE_PWD_H
52 #include <pwd.h>
53 #endif
54
55 #ifdef KRB5
56 #include <krb5.h>
57 #endif
58 #include <kafs.h>
59
60 #include <err.h>
61 #include <roken.h>
62 #include <getarg.h>
63
64 #ifndef TKT_ROOT
65 #define TKT_ROOT "/tmp/tkt"
66 #endif
67
68 static int help_flag;
69 static int version_flag;
70 static int c_flag;
71 #ifdef KRB5
72 static char *typename_arg;
73 #endif
74
75 struct getargs getargs[] = {
76 { NULL, 'c', arg_flag, &c_flag },
77 #ifdef KRB5
78 { "cache-type", 0, arg_string, &typename_arg },
79 #endif
80 { "version", 0, arg_flag, &version_flag },
81 { "help", 'h', arg_flag, &help_flag },
82 };
83
84 static int num_args = sizeof(getargs) / sizeof(getargs[0]);
85
86 static void
usage(int ecode)87 usage(int ecode)
88 {
89 arg_printusage(getargs, num_args, NULL, "command [args...]");
90 exit(ecode);
91 }
92
93 /*
94 * Run command with a new ticket file / credentials cache / token
95 */
96
97 int
main(int argc,char ** argv)98 main(int argc, char **argv)
99 {
100 int f;
101 char tf[1024];
102 char *p;
103
104 char *path;
105 char **args;
106 unsigned int i;
107 int optind = 0;
108
109 setprogname(argv[0]);
110 if(getarg(getargs, num_args, argc, argv, &optind))
111 usage(1);
112 if(help_flag)
113 usage(0);
114 if(version_flag) {
115 print_version(NULL);
116 exit(0);
117 }
118
119 argc -= optind;
120 argv += optind;
121
122 #ifdef KRB5
123 {
124 krb5_error_code ret;
125 krb5_context context;
126 krb5_ccache id;
127 const char *name;
128
129 ret = krb5_init_context(&context);
130 if (ret) /* XXX should this really call exit ? */
131 errx(1, "no kerberos 5 support");
132
133 ret = krb5_cc_new_unique(context, typename_arg, NULL, &id);
134 if (ret)
135 krb5_err(context, 1, ret, "Failed generating credential cache");
136
137 name = krb5_cc_get_name(context, id);
138 if (name == NULL)
139 krb5_errx(context, 1, "Generated credential cache have no name");
140
141 snprintf(tf, sizeof(tf), "%s:%s", krb5_cc_get_type(context, id), name);
142
143 ret = krb5_cc_close(context, id);
144 if (ret)
145 krb5_err(context, 1, ret, "Failed closing credential cache");
146
147 krb5_free_context(context);
148
149 esetenv("KRB5CCNAME", tf, 1);
150 }
151 #endif
152
153 snprintf (tf, sizeof(tf), "%s_XXXXXX", TKT_ROOT);
154 f = mkstemp (tf);
155 if (f < 0)
156 err(1, "mkstemp failed");
157 close (f);
158 unlink (tf);
159 esetenv("KRBTKFILE", tf, 1);
160
161 i = 0;
162
163 args = (char **) malloc((argc + 10)*sizeof(char *));
164 if (args == NULL)
165 errx (1, "Out of memory allocating %lu bytes",
166 (unsigned long)((argc + 10)*sizeof(char *)));
167
168 if(*argv == NULL) {
169 path = getenv("SHELL");
170 if(path == NULL){
171 struct passwd *pw = k_getpwuid(geteuid());
172 if (pw == NULL)
173 errx(1, "no such user: %d", (int)geteuid());
174 path = strdup(pw->pw_shell);
175 }
176 } else {
177 path = strdup(*argv++);
178 }
179 if (path == NULL)
180 errx (1, "Out of memory copying path");
181
182 p=strrchr(path, '/');
183 if(p)
184 args[i] = strdup(p+1);
185 else
186 args[i] = strdup(path);
187
188 if (args[i++] == NULL)
189 errx (1, "Out of memory copying arguments");
190
191 while(*argv)
192 args[i++] = *argv++;
193
194 args[i++] = NULL;
195
196 if(k_hasafs())
197 k_setpag();
198
199 unsetenv("PAGPID");
200 execvp(path, args);
201 if (errno == ENOENT || c_flag) {
202 char **sh_args = malloc ((i + 2) * sizeof(char *));
203 unsigned int j;
204
205 if (sh_args == NULL)
206 errx (1, "Out of memory copying sh arguments");
207 for (j = 1; j < i; ++j)
208 sh_args[j + 2] = args[j];
209 sh_args[0] = "sh";
210 sh_args[1] = "-c";
211 sh_args[2] = path;
212 execv ("/bin/sh", sh_args);
213 }
214 err (1, "execvp");
215 }
216