text: /*
   * Copyright (c) 2008 - 2010 Kungliga Tekniska Högskolan
   * (Royal Institute of Technology, Stockholm, Sweden).
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * 3. Neither the name of the Institute nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include "kuser_locl.h"
  #include "kcc-commands.h"
  
  #ifdef HAVE_READLINE
  char *readline(const char *prompt);
  #else
  
  static char *
  readline(const char *prompt)
  {
      char buf[BUFSIZ];
      printf ("%s", prompt);
      fflush (stdout);
      if(fgets(buf, sizeof(buf), stdin) == NULL)
  	return NULL;
      buf[strcspn(buf, "\r\n")] = '\0';
      return strdup(buf);
  }
  
  #endif
  
  /*
   *
   */
  
  int
  kswitch(struct kswitch_options *opt, int argc, char **argv)
  {
      krb5_error_code ret;
      krb5_ccache id = NULL;
  
      if (opt->cache_string && opt->principal_string)
  	krb5_errx(kcc_context, 1,
  		  N_("Both --cache and --principal given, choose one", ""));
  
      if (opt->interactive_flag) {
  	krb5_cc_cache_cursor cursor;
  	krb5_ccache *ids = NULL;
  	size_t i, len = 0;
  	char *name;
  	rtbl_t ct;
  
  	ct = rtbl_create();
  
  	rtbl_add_column_by_id(ct, 0, "#", 0);
  	rtbl_add_column_by_id(ct, 1, "Principal", 0);
  	rtbl_set_column_affix_by_id(ct, 1, "    ", "");
          rtbl_add_column_by_id(ct, 2, "Type", 0);
          rtbl_set_column_affix_by_id(ct, 2, "  ", "");
  
  	ret = krb5_cc_cache_get_first(kcc_context, NULL, &cursor);
  	if (ret)
  	    krb5_err(kcc_context, 1, ret, "krb5_cc_cache_get_first");
  
  	while (krb5_cc_cache_next(kcc_context, cursor, &id) == 0) {
  	    krb5_principal p;
  	    char num[10];
  
  	    ret = krb5_cc_get_principal(kcc_context, id, &p);
  	    if (ret)
  		continue;
  
  	    ret = krb5_unparse_name(kcc_context, p, &name);
  	    krb5_free_principal(kcc_context, p);
  
  	    snprintf(num, sizeof(num), "%d", (int)(len + 1));
  	    rtbl_add_column_entry_by_id(ct, 0, num);
  	    rtbl_add_column_entry_by_id(ct, 1, name);
              rtbl_add_column_entry_by_id(ct, 2, krb5_cc_get_type(kcc_context, id));
  	    free(name);
  
  	    ids = erealloc(ids, (len + 1) * sizeof(ids[0]));
  	    ids[len] = id;
  	    len++;
  	}
  	krb5_cc_cache_end_seq_get(kcc_context, cursor);
  
  	rtbl_format(ct, stdout);
  	rtbl_destroy(ct);
  
  	name = readline("Select number: ");
  	if (name) {
  	    i = atoi(name);
  	    if (i == 0)
  		krb5_errx(kcc_context, 1, "Cache number '%s' is invalid", name);
  	    if (i > len)
  		krb5_errx(kcc_context, 1, "Cache number '%s' is too large", name);
  
  	    id = ids[i - 1];
  	    ids[i - 1] = NULL;
  	} else
  	    krb5_errx(kcc_context, 1, "No cache selected");
  	for (i = 0; i < len; i++)
  	    if (ids[i])
  		krb5_cc_close(kcc_context, ids[i]);
  
      } else if (opt->principal_string) {
  	krb5_principal p;
  
  	ret = krb5_parse_name(kcc_context, opt->principal_string, &p);
  	if (ret)
  	    krb5_err(kcc_context, 1, ret, "krb5_parse_name: %s",
  		     opt->principal_string);
  
  	ret = krb5_cc_cache_match(kcc_context, p, &id);
  	if (ret)
  	    krb5_err(kcc_context, 1, ret,
  		     N_("Did not find principal: %s", ""),
  		     opt->principal_string);
  
  	krb5_free_principal(kcc_context, p);
  
      } else if (opt->cache_string) {
  	const krb5_cc_ops *ops;
  	char *str;
  
  	ops = krb5_cc_get_prefix_ops(kcc_context, opt->type_string);
  	if (ops == NULL)
  	    krb5_err(kcc_context, 1, 0, "krb5_cc_get_prefix_ops");
  
  	asprintf(&str, "%s:%s", ops->prefix, opt->cache_string);
  	if (str == NULL)
  	    krb5_errx(kcc_context, 1, N_("out of memory", ""));
  
  	ret = krb5_cc_resolve(kcc_context, str, &id);
  	if (ret)
  	    krb5_err(kcc_context, 1, ret, "krb5_cc_resolve: %s", str);
  
  	free(str);
      } else {
  	krb5_errx(kcc_context, 1, "missing option for kswitch");
      }
  
      ret = krb5_cc_switch(kcc_context, id);
      if (ret)
  	krb5_err(kcc_context, 1, ret, "krb5_cc_switch");
  
      return 0;
  }
  