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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
*
*/
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include "trace-local.h"
static struct tracecmd_output *create_output(const char *file,
const char *tracing_dir, const char *kallsyms)
{
struct tracecmd_output *out;
out = tracecmd_output_create(file);
if (!out)
goto error;
if (tracing_dir && tracecmd_output_set_trace_dir(out, tracing_dir))
goto error;
if (kallsyms && tracecmd_output_set_kallsyms(out, kallsyms))
goto error;
if (tracecmd_output_write_headers(out, NULL))
goto error;
return out;
error:
if (out)
tracecmd_output_close(out);
unlink(file);
return NULL;
}
void trace_restore (int argc, char **argv)
{
struct tracecmd_output *handle;
const char *output_file = DEFAULT_INPUT_FILE;
const char *output = NULL;
const char *input = NULL;
const char *tracing_dir = NULL;
const char *kallsyms = NULL;
struct stat st1;
struct stat st2;
int first_arg;
int create_only = 0;
int args;
int c;
if (argc < 2)
usage(argv);
if (strcmp(argv[1], "restore") != 0)
usage(argv);
while ((c = getopt(argc-1, argv+1, "+hco:i:t:k:")) >= 0) {
switch (c) {
case 'h':
usage(argv);
break;
case 'c':
if (input)
die("-c and -i are incompatible");
create_only = 1;
/* make output default to partial */
output_file = "trace-partial.dat";
break;
case 't':
tracing_dir = optarg;
break;
case 'k':
kallsyms = optarg;
break;
case 'o':
if (output)
die("only one output file allowed");
output = optarg;
break;
case 'i':
if (input)
die("only one input file allowed");
if (create_only)
die("-c and -i are incompatible");
input = optarg;
break;
default:
usage(argv);
}
}
if (!output)
output = output_file;
if ((argc - optind) <= 1) {
if (!create_only) {
warning("No data files found");
usage(argv);
}
handle = create_output(output, tracing_dir, kallsyms);
if (!handle)
die("Unabled to create output file %s", output);
if (tracecmd_write_cmdlines(handle) < 0)
die("Failed to write command lines");
tracecmd_output_close(handle);
exit(0);
}
first_arg = optind + 1;
args = argc - first_arg;
printf("first = %d %s args=%d\n", first_arg, argv[first_arg], args);
/* Make sure input and output are not the same file */
if (input && output) {
if (stat(input, &st1) < 0)
die("%s:", input);
/* output exists? otherwise we don't care */
if (stat(output, &st2) == 0) {
if (st1.st_ino == st2.st_ino &&
st1.st_dev == st2.st_dev)
die("input and output file are the same");
}
}
if (input) {
struct tracecmd_input *ihandle;
ihandle = tracecmd_alloc(input, 0);
if (!ihandle)
die("error reading file %s", input);
/* make sure headers are ok */
if (tracecmd_read_headers(ihandle, TRACECMD_FILE_CMD_LINES) < 0)
die("error reading file %s headers", input);
handle = tracecmd_copy(ihandle, output, TRACECMD_FILE_CMD_LINES, 0, NULL);
tracecmd_close(ihandle);
} else {
handle = tracecmd_output_create(output);
tracecmd_output_write_headers(handle, NULL);
}
if (!handle)
die("error writing to %s", output);
if (tracecmd_append_cpu_data(handle, args, &argv[first_arg]) < 0)
die("failed to append data");
return;
}
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