/*
* Copyright (c) 1999-2001 Proofpoint, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
*/
/*
** This program checks to see if your version of seteuid works.
** Compile it, make it set-user-ID root, and run it as yourself (NOT as
** root). If it won't compile or outputs any MAYDAY messages, don't
** define USESETEUID in conf.h.
**
** NOTE: It is not sufficient to have seteuid in your library.
** You must also have saved uids that function properly.
**
** Compilation is trivial -- just "cc t_seteuid.c". Make it set-user-ID
** root and then execute it as a non-root user.
*/
#include <unistd.h>
#include <stdio.h>
#ifndef lint
#endif /* ! lint */
#ifdef __hpux
#endif /* __hpux */
static void
char *str;
uid_t r, e;
{
}
int
int argc;
char **argv;
{
int fail = 0;
if (geteuid() != 0)
{
printf("SETUP ERROR: re-run set-user-ID root\n");
exit(1);
}
if (getuid() == 0)
{
printf("SETUP ERROR: must be run by a non-root user\n");
exit(1);
}
if (seteuid(1) < 0)
printf("seteuid(1) failure\n");
if (geteuid() != 1)
{
fail++;
printf("MAYDAY! Wrong effective uid\n");
}
/* do activity here */
if (seteuid(0) < 0)
{
fail++;
printf("seteuid(0) failure\n");
}
if (geteuid() != 0)
{
fail++;
printf("MAYDAY! Wrong effective uid\n");
}
{
fail++;
printf("MAYDAY! Wrong real uid\n");
}
printf("\n");
if (seteuid(2) < 0)
{
fail++;
printf("seteuid(2) failure\n");
}
if (geteuid() != 2)
{
fail++;
printf("MAYDAY! Wrong effective uid\n");
}
/* do activity here */
if (seteuid(0) < 0)
{
fail++;
printf("seteuid(0) failure\n");
}
if (geteuid() != 0)
{
fail++;
printf("MAYDAY! Wrong effective uid\n");
}
{
fail++;
printf("MAYDAY! Wrong real uid\n");
}
if (fail)
{
printf("\nThis system cannot use seteuid\n");
exit(1);
}
printf("\nIt is safe to define USESETEUID on this system\n");
exit(0);
}