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/*
* Guillaume Cottenceau (gc@mandrakesoft.com)
*
* Copyright 2000 MandrakeSoft
*
* This software may be freely redistributed under the terms of the GNU
* public license.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* mar - The Mandrake Archiver
*
* An archiver that supports compression (through zlib).
*
*/
/*
* This code includes the extracting and creating features.
*
*/
#include "mar.h"
#include "mar-extract-only.h"
void
list_files(struct mar_stream *s)
{
struct mar_element * elem = s->first_element;
printf("%-20s%8s\n", "FILENAME", "LENGTH");
while (elem)
{
printf("%-20s%8d\n", elem->filename, elem->file_length);
elem = elem->next_element;
}
}
int
file_size(char *filename)
{
struct stat buf;
if (stat(filename, &buf) != 0)
{
perror(filename);
return -1;
}
return buf.st_size;
}
/* Yes I don't use the datastructure I directly write the final fileformat in memory then write down it.
* Yes it's bad.
*/
/* ``files'' is a NULL-terminated array of char* */
int
create_marfile(char *dest_file, char **files)
{
int filenum = 0;
int current_offset_filetable;
int current_offset_rawdata;
char * temp_marfile_buffer;
int total_length;
/* calculate offset of ``raw_files_data'' */
current_offset_rawdata = sizeof(int) + sizeof(char); /* crc32, ``char 0'' */
while (files[filenum])
{
current_offset_rawdata += 2*sizeof(int) /* file_length, data_offset */ + strlen(files[filenum]) + 1;
filenum++;
}
DEBUG_MAR(printf("D: mar::create_marfile number-of-files %d offset-data-start %d\n", filenum, current_offset_rawdata););
/* calculate length of final uncompressed marfile, for malloc */
total_length = current_offset_rawdata; /* first part of the marfile: the crc plus filetable */
filenum = 0;
while (files[filenum])
{
int fsiz = file_size(files[filenum]);
if (fsiz == -1)
return -1;
total_length += fsiz;
filenum++;
}
temp_marfile_buffer = (char *) alloca(total_length); /* create the whole file in-memory */
DEBUG_MAR(printf("D: mar::create_marfile total-length %d\n", total_length););
current_offset_filetable = sizeof(int); /* first file is after the crc */
filenum = 0;
while (files[filenum])
{
FILE * f = fopen(files[filenum], "rb");
int fsize;
if (!f)
{
perror(files[filenum]);
return -1;
}
/* filename */
strcpy(&(temp_marfile_buffer[current_offset_filetable]), files[filenum]);
current_offset_filetable += strlen(files[filenum]) + 1;
/* file_length */
fsize = file_size(files[filenum]);
if (fsize == -1) return -1;
memcpy(&temp_marfile_buffer[current_offset_filetable], &fsize, sizeof(int));
current_offset_filetable += sizeof(int);
/* data_offset */
memcpy(&temp_marfile_buffer[current_offset_filetable], ¤t_offset_rawdata, sizeof(int));
current_offset_filetable += sizeof(int);
/* data_raw_data */
if (fread(&temp_marfile_buffer[current_offset_rawdata], 1, fsize, f) != fsize)
{
perror(files[filenum]);
return -1;
}
fclose(f);
current_offset_rawdata += fsize;
filenum++;
}
/* write down ``char 0'' to terminate file table */
memset(&temp_marfile_buffer[current_offset_filetable], 0, sizeof(char));
/* calculate crc with all the data we now got */
{
int current_crc = 0;
int i;
for (i=sizeof(int); i<total_length ; i++)
current_crc += temp_marfile_buffer[i];
memcpy(&temp_marfile_buffer[0], ¤t_crc, sizeof(int));
DEBUG_MAR(printf("D: mar::create_marfile computed-crc %d\n", current_crc););
}
/* ok, buffer is ready, let's write it on-disk */
{
gzFile f = gzopen(dest_file, "wb");
if (!f)
{
perror(dest_file);
return -1;
}
if (gzwrite(f, temp_marfile_buffer, total_length) != total_length)
{
fprintf(stderr, gzerror(f, &gz_errnum));
return -1;
}
gz_errnum = gzclose(f);
}
return 0;
}
void
print_usage(char *progname)
{
printf("Usage: %s [-lxc] [files..]\n", progname);
exit(0);
}
int
main(int argc, char **argv)
{
if (argc <= 2)
print_usage(argv[0]);
if (argc >= 3)
{
if (strcmp(argv[1], "-l") == 0)
{
struct mar_stream s;
if (open_marfile(argv[2], &s) != 0)
{
fprintf(stderr, "E: open-marfile-failed\n");
exit(-1);
}
list_files(&s);
if (s.crc32 == calc_integrity(&s))
printf("CRC OK\n");
else
printf("CRC FAILED!\n");
exit(0);
}
if ((strcmp(argv[1], "-x") == 0) && argc >= 4)
{
struct mar_stream s;
int i = 3;
if (open_marfile(argv[2], &s) != 0)
exit(-1);
while (i < argc)
{
int res = extract_file(&s, argv[i], "./");
if (res == 1)
fprintf(stderr, "W: file-not-found-in-archive %s\n", argv[i]);
if (res == -1)
exit(-1);
i++;
}
exit(0);
}
if ((strcmp(argv[1], "-c") == 0) && argc >= 4)
{
char **files = (char **) malloc(((argc-3)+1) * sizeof(char *));
int i = 3;
while (i < argc)
{
files[i-3] = strdup(argv[i]);
i++;
}
files[argc-3] = NULL;
{
int results;
results = create_marfile(argv[2], files);
if (results != 0)
fprintf(stderr, "E: create-marfile-failed\n");
exit(results);
}
}
}
return 0;
}
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