telemetrics-client/tests/read_oopsfile.c

/*
 * This program is part of the Clear Linux Project
 *
 * Copyright 2015 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms and conditions of the GNU Lesser General Public License, as
 * published by the Free Software Foundation; either version 2.1 of the License,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>

#include "log.h"
#include "read_oopsfile.h"

unsigned long buflen = 0;

char *readfile(char *filepath)
{
        char *bufp = NULL;
        long ret = 0;

        buflen = 0;
        FILE *fp = fopen(filepath, "r");
        if (fp != NULL) {
                if (fseek(fp, 0L, SEEK_END)) {
                        telem_log(LOG_ERR, "error finding end of file\n");
                } else {
                        // Get buffer size
                        ret = ftell(fp);
                        if (ret == -1) {
                                telem_log(LOG_ERR, "Error reading buffer size\n");
                        } else {
                                buflen = (unsigned long)ret;
                        }
                        // Read entire file to Buffer
                        if (fseek(fp, 0L, SEEK_SET)) {
                                telem_log(LOG_ERR, "Error going back to beginning of file\n");
                        }
                        bufp = (char *)malloc(sizeof(char) * (buflen + 1));
                        if (!bufp) {
                                telem_log(LOG_ERR, "Memory Error\n");
                        }
                        if (fread(bufp, sizeof(char), buflen, fp) != buflen) {
                                telem_log(LOG_ERR, "Error reading file\n");
                        } else {
                                bufp[buflen] = '\0';
                        }
                }
                if (fclose(fp) != 0) {
                        printf("Error closing file: %s\n", strerror(errno));
                }
        } else {
                telem_log(LOG_ERR, "Wrong file pathname: %s", filepath);
        }

        return bufp;
}

unsigned long getbuflen()
{
        return buflen;
}

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