/*
* Copyright 2014-2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of the copyright holder 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 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
* OWNER 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.
*/
/*
* printlog -- given a log file, print the entries
*
* Usage:
* printlog [-t] /path/to/pm-aware/file
*
* -t option means truncate the file after printing it.
*/
#include <ex_common.h>
#include <stdio.h>
#include <fcntl.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <libpmemlog.h>
#include "logentry.h"
/*
* printlog -- callback function called when walking the log
*/
static int
printlog(const void *buf, size_t len, void *arg)
{
/* first byte after log contents */
const void *endp = (char *)buf + len;
/* for each entry in the log... */
while (buf < endp) {
struct logentry *headerp = (struct logentry *)buf;
buf = (char *)buf + sizeof(struct logentry);
/* print the header */
printf("Entry from pid: %d\n", headerp->pid);
printf(" Created: %s", ctime(&headerp->timestamp));
printf(" Contents:\n");
/* print the log data itself, it is NUL-terminated */
printf("%s", (char *)buf);
buf = (char *)buf + headerp->len;
}
return 0;
}
int
main(int argc, char *argv[])
{
int ind = 1;
int tflag = 0;
PMEMlogpool *plp;
if (argc > 2) {
if (strcmp(argv[1], "-t") == 0) {
tflag = 1;
ind++;
} else {
fprintf(stderr, "usage: %s [-t] file\n", argv[0]);
exit(1);
}
}
const char *path = argv[ind];
if ((plp = pmemlog_open(path)) == NULL) {
perror(path);
exit(1);
}
/* the rest of the work happens in printlog() above */
pmemlog_walk(plp, 0, printlog, NULL);
if (tflag)
pmemlog_rewind(plp);
pmemlog_close(plp);
}