/usr/src/blcr-0.8.5/tests/reloc_aux.c is in blcr-dkms 0.8.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Berkeley Lab Checkpoint/Restart (BLCR) for Linux is Copyright (c)
* 2008, The Regents of the University of California, through Lawrence
* Berkeley National Laboratory (subject to receipt of any required
* approvals from the U.S. Dept. of Energy). All rights reserved.
*
* Portions may be copyrighted by others, as may be noted in specific
* copyright notices within specific files.
*
* 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
*
* $Id: reloc_aux.c,v 1.8 2008/07/26 06:38:15 phargrov Exp $
*
* Simple program for testing --relocate
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#define FILENAME_FMT "%s/reloc_tmp"
#define UFILENAME_FMT "%s/reloc_utmp"
#define FIFONAME_FMT "%s/reloc_fifo"
#define UFIFONAME_FMT "%s/reloc_ufifo"
#define DIRNAME_FMT "%s/reloc_dir"
#include "crut_util.h" /* For crut_find_cmd() */
static const char *chkpt_cmd;
void checkpoint_self(const char *filename)
{
char *cmd = NULL;
int ret;
cmd = crut_aprintf("exec %s --file %s %d", chkpt_cmd, filename, (int)getpid());
ret = system(cmd);
if (!WIFEXITED(ret) || WEXITSTATUS(ret)) {
fprintf(stderr, "'%s' failed %d\n", cmd, ret);
exit(1);
}
free(cmd);
}
static const char msg[] = "This is just fine.";
static int prep_file(const char *name) {
int fd = open(name, O_CREAT|O_RDWR|O_TRUNC, S_IREAD|S_IWRITE);
if (fd < 0) {
perror("open(file)");
exit(-1);
}
if (write(fd, msg, sizeof(msg)) < 0) {
perror("write(file)");
exit(-1);
}
return fd;
}
static void check_file(int fd) {
int rc;
char buf[1024];
if (lseek(fd, 0, SEEK_SET) == (loff_t)(-1)) {
perror("lseek(file)");
exit(-1);
}
rc = read(fd, buf, sizeof(msg));
if (rc != sizeof(msg)) {
perror("read(file)");
exit(-1);
}
if (strcmp(msg, buf)) {
fprintf(stderr, "Compare of file to original failed\n");
exit(-1);
}
close(fd);
}
static int prep_fifo(const char *name) {
int fd;
if (mknod(name, 0600 | S_IFIFO, 0)) {
perror("mknod(fifo)");
exit(-1);
}
fd = open(name, O_RDWR);
if (fd < 0) {
perror("open(fifo)");
exit(-1);
}
return fd;
}
static void check_fifo(int fd) {
int rc;
char buf[1024];
rc = write(fd, msg, sizeof(msg));
if (rc != sizeof(msg)) {
perror("write(fifo)");
exit(-1);
}
rc = read(fd, buf, sizeof(msg));
if (rc != sizeof(msg)) {
perror("read(fifo)");
exit(-1);
}
if (strcmp(msg, buf)) {
fprintf(stderr, "Data in fifo is incorrect\n");
exit(-1);
}
close(fd);
}
int main(int argc, const char *argv[]) {
int file_fd = -1;
int ufile_fd = -1;
int fifo_fd = -1;
int ufifo_fd = -1;
char *filename;
const char *dirname;
const char *context;
if (argc != 3) {
fprintf(stderr, "%s expects exactly 2 arguments: DIR CONTEXTFILE\n", argv[0]);
exit(-1);
}
chkpt_cmd = crut_find_cmd(argv[0], "cr_checkpoint");
dirname = argv[1];
context = argv[2];
/* Create and write a file */
filename = crut_aprintf(FILENAME_FMT, dirname);
file_fd = prep_file(filename);
free(filename);
/* Create and write a filem, then unlink */
filename = crut_aprintf(UFILENAME_FMT, dirname);
ufile_fd = prep_file(filename);
if (unlink(filename)) {
perror("unlink(file)");
exit(-1);
}
free(filename);
/* mknod() and open() a FIFO */
filename = crut_aprintf(FIFONAME_FMT, dirname);
fifo_fd = prep_fifo(filename);
free(filename);
/* mknod() and open() a FIFO, then unlink */
filename = crut_aprintf(UFIFONAME_FMT, dirname);
ufifo_fd = prep_fifo(filename);
if (unlink(filename)) {
perror("unlink(fifo)");
exit(-1);
}
free(filename);
/* MKDIR and CD to the working directory */
filename = crut_aprintf(DIRNAME_FMT, dirname);
if (mkdir(filename, 0755)) {
perror("mkdir()");
exit(-1);
}
if (chdir(filename)) {
perror("chdir()");
exit(-1);
}
free(filename);
/* Take the checkpoint */
checkpoint_self(context);
/* Seek, read and compare open() files */
check_file(file_fd);
check_file(ufile_fd);
/* write, read and compare open() fifos */
check_fifo(fifo_fd);
check_fifo(ufifo_fd);
return 0;
}
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