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/*
* Copyright (c) 2002-2004 Abraham vd Merwe <abz@blio.com>
* Copyright (c) 2016 Peter Pentchev <roam@ringlet.net>
* 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.
* 3. Neither the name of the author nor the names of other 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 REGENTS 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 <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/fcntl.h>
#include <unistd.h>
#include <debug/memory.h>
#include <debug/log.h>
#include <debug/hex.h>
#define SIZE 8192
static void *getfile (int fd,size_t *length)
{
size_t size = SIZE;
char *buf;
ssize_t result;
if ((buf = mem_alloc (size)) == NULL)
{
log_printf (LOG_ERROR,"failed to allocate memory: %m\n");
return (NULL);
}
*length = 0;
while ((result = read (fd,buf + *length,size - *length)) > 0)
{
*length += result;
if (*length == size)
{
void *ptr;
size += SIZE;
if ((ptr = mem_realloc (buf,size)) == NULL)
{
log_printf (LOG_ERROR,"failed to allocate memory: %m\n");
mem_free (buf);
return (NULL);
}
buf = ptr;
}
}
if (result < 0)
{
log_printf (LOG_ERROR,"read: %m\n");
mem_free (buf);
return (NULL);
}
return (buf);
}
int main (int argc,char *argv[])
{
void *buf;
size_t length;
int fd;
mem_open (NULL);
log_open (NULL,LOG_NORMAL,0);
atexit (mem_close);
atexit (log_close);
if (argc != 2)
{
const char *progname;
(progname = strrchr (argv[0],'/')) != NULL ? progname++ : (progname = argv[0]);
log_printf (LOG_ERROR,"usage: %s <filename>\n",progname);
exit (EXIT_FAILURE);
}
if (strcmp(argv[1], "-") == 0)
fd = 0;
else if ((fd = open (argv[1],O_RDONLY)) < 0)
{
log_printf (LOG_ERROR,"open %s: %m\n",argv[1]);
exit (EXIT_FAILURE);
}
if ((buf = getfile (fd,&length)) == NULL)
{
close (fd);
exit (EXIT_FAILURE);
}
hexdump (LOG_NORMAL,buf,length);
log_flush ();
mem_free (buf);
close (fd);
exit (EXIT_SUCCESS);
}
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