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 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 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