libc
/* $Id$ */
/* Copyright (c) 2013-2020 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS System libc */
/* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* HOLDER 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 <sys/wait.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <libgen.h>
#include <unistd.h>
#include <errno.h>
/* unistd */
/* private */
/* prototypes */
static int _chroot(char const * progname);
static int _error(char const * progname, char const * message, int ret);
static int _fork(char const * progname);
static int _getgroups(char const * progname);
static int _gethostname(char const * progname);
static int _sleep(char const * progname, unsigned int t);
/* functions */
/* chroot */
static int _chroot(char const * progname)
{
char * p;
char * dir;
int res;
printf("%s: Testing chroot()\n", progname);
if((p = strdup(progname)) == NULL)
return _error(progname, "strdup", 2);
dir = dirname(p);
res = chroot(dir);
free(p);
if(res != 0)
switch(errno)
{
case ENOSYS:
case EPERM:
/* we can ignore these errors */
break;
default:
return _error(progname, "chroot", 3);
}
return 0;
}
/* error */
static int _error(char const * progname, char const * message, int ret)
{
fprintf(stderr, "%s: %s: %s\n", progname, message, strerror(errno));
return ret;
}
/* fork */
static int _fork(char const * progname)
{
pid_t pid;
int res = 42;
pid_t p;
int status;
printf("%s: Testing fork()\n", progname);
if((pid = fork()) == -1)
return _error(progname, "fork", 4);
if(pid == 0)
/* child process */
_exit(res);
/* parent process */
for(;;)
{
if((p = waitpid(pid, &status, 0)) == -1)
break;
if(p != pid)
continue;
if(WIFEXITED(status) && WEXITSTATUS(status) == res)
return 0;
}
return _error(progname, "waitpid", 8);
}
/* getgroups */
static int _getgroups(char const * progname)
{
int n;
gid_t * groups;
int i;
char const * sep = "";
printf("%s: Testing getgroups()\n", progname);
if((n = getgroups(0, NULL)) < 0)
return _error(progname, "getgroups", 16);
if(n == 0)
return 0;
if((groups = malloc(sizeof(*groups) * n)) == NULL)
return _error(progname, "malloc", 16);
if((n = getgroups(n, groups)) < 0)
{
free(groups);
return _error(progname, "getgroups", 16);
}
printf("Groups: ");
for(i = 0; i < n; i++)
{
printf("%s%u", sep, groups[i]);
sep = ", ";
}
printf("\n");
free(groups);
return 0;
}
/* gethostname */
static int _gethostname(char const * progname)
{
char hostname[64];
printf("%s: Testing gethostname()\n", progname);
if(gethostname(hostname, sizeof(hostname)) != 0)
return _error(progname, "gethostname", 32);
else
printf("hostname: %s\n", hostname);
return 0;
}
/* sleep */
static int _sleep(char const * progname, unsigned int t)
{
time_t before;
time_t after;
int res;
printf("%s: Testing sleep()\n", progname);
before = time(NULL);
res = sleep(t);
after = time(NULL);
if(res == 0)
return (after - before == t) ? 0 : 64;
/* XXX ignore other cases (signal deliveries...) */
return 0;
}
/* main */
int main(int argc, char * argv[])
{
int ret;
(void) argc;
ret = _chroot(argv[0]);
ret |= _fork(argv[0]);
ret |= _getgroups(argv[0]);
ret |= _gethostname(argv[0]);
ret |= _sleep(argv[0], 0);
ret |= _sleep(argv[0], 1);
return ret;
}