crypto/dist/heimdal/appl/afsutil/pagsh.c

   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("$Heimdal: pagsh.c 14574 2005-02-12 14:23:28Z lha $"
  39         "$NetBSD$");
  40
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #ifdef HAVE_SYS_TYPES_H
  46 #include <sys/types.h>
  47 #endif
  48 #include <time.h>
  49 #ifdef HAVE_FCNTL_H
  50 #include <fcntl.h>
  51 #endif
  52 #ifdef HAVE_PWD_H
  53 #include <pwd.h>
  54 #endif
  55
  56 #ifdef KRB5
  57 #include <krb5.h>
  58 #endif
  59 #ifdef KRB4
  60 #include <krb.h>
  61 #endif
  62 #include <kafs.h>
  63
  64 #include <err.h>
  65 #include <roken.h>
  66 #include <getarg.h>
  67
  68 #ifndef TKT_ROOT
  69 #define TKT_ROOT "/tmp/tkt"
  70 #endif
  71
  72 static int help_flag;
  73 static int version_flag;
  74 static int c_flag;
  75 #ifdef KRB5
  76 static char *typename_arg;
  77 #endif
  78
  79 struct getargs getargs[] = {
  80     { NULL,     'c', arg_flag, &c_flag },
  81 #ifdef KRB5
  82     { "cache-type", 0,  arg_string, &typename_arg },
  83 #endif
  84     { "version", 0,  arg_flag, &version_flag },
  85     { "help",   'h', arg_flag, &help_flag },
  86 };
  87
  88 static int num_args = sizeof(getargs) / sizeof(getargs[0]);
  89
  90 static void
  91 usage(int ecode)
  92 {
  93     arg_printusage(getargs, num_args, NULL, "command [args...]");
  94     exit(ecode);
  95 }
  96
  97 /*
  98  * Run command with a new ticket file / credentials cache / token
  99  */
 100
 101 int
 102 main(int argc, char **argv)
 103 {
 104     int f;
 105     char tf[1024];
 106     char *p;
 107
 108     char *path;
 109     char **args;
 110     int i;
 111     int optind = 0;
 112
 113     setprogname(argv[0]);
 114     if(getarg(getargs, num_args, argc, argv, &optind))
 115         usage(1);
 116     if(help_flag)
 117         usage(0);
 118     if(version_flag) {
 119         print_version(NULL);
 120         exit(0);
 121     }
 122
 123     argc -= optind;
 124     argv += optind;
 125
 126 #ifdef KRB5
 127     {
 128         const krb5_cc_ops *type;
 129         krb5_error_code ret;
 130         krb5_context context;
 131         krb5_ccache id;
 132         const char *name;
 133
 134         ret = krb5_init_context(&context);
 135         if (ret) /* XXX should this really call exit ? */
 136             errx(1, "no kerberos 5 support");
 137
 138         if (typename_arg == NULL) {
 139             char *s;
 140
 141             name = krb5_cc_default_name(context);
 142             if (name == NULL)
 143                 krb5_errx(context, 1, "Failed getting default "
 144                           "credential cache type");
 145
 146             typename_arg = strdup(name);
 147             if (typename_arg == NULL)
 148                 errx(1, "strdup");
 149
 150             s = strchr(typename_arg, ':');
 151             if (s)
 152                 *s = '\0';
 153         }
 154
 155         type = krb5_cc_get_prefix_ops(context, typename_arg);
 156         if (type == NULL)
 157             krb5_err(context, 1, ret, "Failed getting ops for %s "
 158                      "credential cache", typename_arg);
 159
 160         ret = krb5_cc_gen_new(context, type, &id);
 161         if (ret)
 162             krb5_err(context, 1, ret, "Failed generating credential cache");
 163
 164         name = krb5_cc_get_name(context, id);
 165         if (name == NULL)
 166             krb5_errx(context, 1, "Generated credential cache have no name");
 167
 168         snprintf(tf, sizeof(tf), "%s:%s", typename_arg, name);
 169
 170         ret = krb5_cc_close(context, id);
 171         if (ret)
 172             krb5_err(context, 1, ret, "Failed closing credential cache");
 173
 174         krb5_free_context(context);
 175
 176         esetenv("KRB5CCNAME", tf, 1);
 177     }
 178 #endif
 179
 180     snprintf (tf, sizeof(tf), "%s_XXXXXX", TKT_ROOT);
 181     f = mkstemp (tf);
 182     if (f < 0)
 183         err(1, "mkstemp failed");
 184     close (f);
 185     unlink (tf);
 186     esetenv("KRBTKFILE", tf, 1);
 187
 188     i = 0;
 189
 190     args = (char **) malloc((argc + 10)*sizeof(char *));
 191     if (args == NULL)
 192         errx (1, "Out of memory allocating %lu bytes",
 193               (unsigned long)((argc + 10)*sizeof(char *)));
 194
 195     if(*argv == NULL) {
 196         path = getenv("SHELL");
 197         if(path == NULL){
 198             struct passwd *pw = k_getpwuid(geteuid());
 199             path = strdup(pw->pw_shell);
 200         }
 201     } else {
 202         path = strdup(*argv++);
 203     }
 204     if (path == NULL)
 205         errx (1, "Out of memory copying path");
 206
 207     p=strrchr(path, '/');
 208     if(p)
 209         args[i] = strdup(p+1);
 210     else
 211         args[i] = strdup(path);
 212
 213     if (args[i++] == NULL)
 214         errx (1, "Out of memory copying arguments");
 215
 216     while(*argv)
 217         args[i++] = *argv++;
 218
 219     args[i++] = NULL;
 220
 221     if(k_hasafs())
 222         k_setpag();
 223
 224     unsetenv("PAGPID");
 225     execvp(path, args);
 226     if (errno == ENOENT || c_flag) {
 227         char **sh_args = malloc ((i + 2) * sizeof(char *));
 228         int j;
 229
 230         if (sh_args == NULL)
 231             errx (1, "Out of memory copying sh arguments");
 232         for (j = 1; j < i; ++j)
 233             sh_args[j + 2] = args[j];
 234         sh_args[0] = "sh";
 235         sh_args[1] = "-c";
 236         sh_args[2] = path;
 237         execv ("/bin/sh", sh_args);
 238     }
 239     err (1, "execvp");
 240 }