1 /* 2 * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska H�gskolan 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: pagsh.c,v 1.4 2000/10/02 05:05:53 assar Exp $"); 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 #ifdef KRB4 59 #include <krb.h> 60 #endif 61 #include <kafs.h> 62 63 #include <err.h> 64 #include <roken.h> 65 66 /* 67 * Run command with a new ticket file / credentials cache / token 68 */ 69 70 int 71 main(int argc, char **argv) 72 { 73 int f; 74 char tf[1024]; 75 char *p; 76 77 char *path; 78 char **args; 79 int i; 80 81 #ifdef KRB5 82 snprintf (tf, sizeof(tf), "%sXXXXXX", KRB5_DEFAULT_CCROOT); 83 f = mkstemp (tf + 5); 84 close (f); 85 unlink (tf + 5); 86 esetenv("KRB5CCNAME", tf, 1); 87 #endif 88 89 #ifdef KRB4 90 snprintf (tf, sizeof(tf), "%s_XXXXXX", TKT_ROOT); 91 f = mkstemp (tf); 92 close (f); 93 unlink (tf); 94 esetenv("KRBTKFILE", tf, 1); 95 #endif 96 97 i = 0; 98 99 args = (char **) malloc((argc + 10)*sizeof(char *)); 100 if (args == NULL) 101 errx (1, "Out of memory allocating %lu bytes", 102 (unsigned long)((argc + 10)*sizeof(char *))); 103 104 argv++; 105 106 if(*argv == NULL) { 107 path = getenv("SHELL"); 108 if(path == NULL){ 109 struct passwd *pw = k_getpwuid(geteuid()); 110 path = strdup(pw->pw_shell); 111 } 112 } else { 113 if(strcmp(*argv, "-c") == 0) argv++; 114 path = strdup(*argv++); 115 } 116 if (path == NULL) 117 errx (1, "Out of memory copying path"); 118 119 p=strrchr(path, '/'); 120 if(p) 121 args[i] = strdup(p+1); 122 else 123 args[i] = strdup(path); 124 125 if (args[i++] == NULL) 126 errx (1, "Out of memory copying arguments"); 127 128 while(*argv) 129 args[i++] = *argv++; 130 131 args[i++] = NULL; 132 133 if(k_hasafs()) 134 k_setpag(); 135 136 unsetenv("PAGPID"); 137 execvp(path, args); 138 if (errno == ENOENT) { 139 char **sh_args = malloc ((i + 2) * sizeof(char *)); 140 int j; 141 142 if (sh_args == NULL) 143 errx (1, "Out of memory copying sh arguments"); 144 for (j = 1; j < i; ++j) 145 sh_args[j + 2] = args[j]; 146 sh_args[0] = "sh"; 147 sh_args[1] = "-c"; 148 sh_args[2] = path; 149 execv ("/bin/sh", sh_args); 150 } 151 err (1, "execvp"); 152 } 153