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/* cvm/cvm-v1checkpassword.c - Checkpassword emulator for CVM
* Copyright (C)2006 Bruce Guenter <bruce@untroubled.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <misc/ucspi.h>
#include <msg/msg.h>
#include "v1client.h"
const char program[] = "cvm-v1checkpassword";
const int msg_show_pid = 0;
static char buffer[513];
static char* pass;
void get_data(void)
{
unsigned buflen;
unsigned rd;
for (buflen = 0; buflen < sizeof buffer; buflen += rd) {
do
rd = read(3, buffer+buflen, sizeof buffer - buflen);
while ((rd == (unsigned)-1) && (errno == EINTR));
if (rd == (unsigned)-1) exit(111); /* Read error */
if (rd == 0) break;
}
close(3);
if (buflen >= sizeof buffer) exit(2); /* Buffer too long */
if ((pass = memchr(buffer, 0, buflen)) == 0) exit(2); /* No password */
++pass;
if (memchr(pass, 0, buflen-(pass-buffer)) == 0) exit(2); /* No terminator */
}
int main(int argc, char** argv)
{
int i;
const char* tokens[2];
if (argc < 3)
die3(111, "usage: ", program, " cvmodule program [args ...]");
get_data();
tokens[0] = pass;
tokens[1] = 0;
if ((i = cvm_client_authenticate(argv[1], buffer, ucspi_localhost(),
tokens, 1)) != 0) return i;
if (!cvm_client_setugid()) return 111;
if (!cvm_client_setenv()) return 111;
execvp(argv[2], argv+2);
return 111;
}
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