crypto/heimdal-0.6.3/appl/afsutil/pagsh.c

   1 /*
   2  * Copyright (c) 1995 - 2002 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: pagsh.c,v 1.6 2002/08/23 17:54:20 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 #include <getarg.h>
  66
  67 static int help_flag;
  68 static int version_flag;
  69 static int c_flag;
  70
  71 struct getargs getargs[] = {
  72     { NULL,     'c', arg_flag, &c_flag },
  73     { "version", 0,  arg_flag, &version_flag },
  74     { "help",   'h', arg_flag, &help_flag },
  75 };
  76
  77 static int num_args = sizeof(getargs) / sizeof(getargs[0]);
  78
  79 static void
  80 usage(int ecode)
  81 {
  82     arg_printusage(getargs, num_args, NULL, "command [args...]");
  83     exit(ecode);
  84 }
  85
  86 /*
  87  * Run command with a new ticket file / credentials cache / token
  88  */
  89
  90 int
  91 main(int argc, char **argv)
  92 {
  93   int f;
  94   char tf[1024];
  95   char *p;
  96
  97   char *path;
  98   char **args;
  99   int i;
 100   int optind = 0;
 101
 102   set_progname(argv[0]);
 103   if(getarg(getargs, num_args, argc, argv, &optind))
 104       usage(1);
 105   if(help_flag)
 106       usage(0);
 107   if(version_flag) {
 108       print_version(NULL);
 109       exit(0);
 110   }
 111
 112   argc -= optind;
 113   argv += optind;
 114
 115 #ifdef KRB5
 116   snprintf (tf, sizeof(tf), "%sXXXXXX", KRB5_DEFAULT_CCROOT);
 117   f = mkstemp (tf + 5);
 118   close (f);
 119   unlink (tf + 5);
 120   esetenv("KRB5CCNAME", tf, 1);
 121 #endif
 122
 123 #ifdef KRB4
 124   snprintf (tf, sizeof(tf), "%s_XXXXXX", TKT_ROOT);
 125   f = mkstemp (tf);
 126   close (f);
 127   unlink (tf);
 128   esetenv("KRBTKFILE", tf, 1);
 129 #endif
 130
 131   i = 0;
 132
 133   args = (char **) malloc((argc + 10)*sizeof(char *));
 134   if (args == NULL)
 135       errx (1, "Out of memory allocating %lu bytes",
 136             (unsigned long)((argc + 10)*sizeof(char *)));
 137
 138   if(*argv == NULL) {
 139     path = getenv("SHELL");
 140     if(path == NULL){
 141       struct passwd *pw = k_getpwuid(geteuid());
 142       path = strdup(pw->pw_shell);
 143     }
 144   } else {
 145     path = strdup(*argv++);
 146   }
 147   if (path == NULL)
 148       errx (1, "Out of memory copying path");
 149
 150   p=strrchr(path, '/');
 151   if(p)
 152     args[i] = strdup(p+1);
 153   else
 154     args[i] = strdup(path);
 155
 156   if (args[i++] == NULL)
 157       errx (1, "Out of memory copying arguments");
 158
 159   while(*argv)
 160     args[i++] = *argv++;
 161
 162   args[i++] = NULL;
 163
 164   if(k_hasafs())
 165     k_setpag();
 166
 167   unsetenv("PAGPID");
 168   execvp(path, args);
 169   if (errno == ENOENT) {
 170       char **sh_args = malloc ((i + 2) * sizeof(char *));
 171       int j;
 172
 173       if (sh_args == NULL)
 174           errx (1, "Out of memory copying sh arguments");
 175       for (j = 1; j < i; ++j)
 176           sh_args[j + 2] = args[j];
 177       sh_args[0] = "sh";
 178       sh_args[1] = "-c";
 179       sh_args[2] = path;
 180       execv ("/bin/sh", sh_args);
 181   }
 182   err (1, "execvp");
 183 }