void ForkSplit(char* fileName, long chunksize, int nchunks, int numOfProc){
FILE* srcFile;
FILE* destFile;
int currentChunk;
int numberActive = 0;
pid_t process;
process = 1;
int status;
for (currentChunk=0; currentChunk < nchunks; currentChunk++, numberActive++){
for (;numberActive>=numOfProc;--numberActive)
wait(&status);
if (process!=0)
//only for from parent
process = fork();
//child
if (process == 0){
srcFile = fopen(fileName, "r");
if (!srcFile){
perror("Can't open file");
exit(EXIT_FAILURE);
}
fseek(srcFile, currentChunk*chunksize, SEEK_SET);
char destFileName[MAX_FILENAME_LENGTH];
snprintf(destFileName, MAX_FILENAME_LENGTH, "%s.0%d", fileName, currentChunk);
destFile = fopen(destFileName, "w+");
if (!destFile){
perror("Can't open file");
exit(EXIT_FAILURE);
}
readAndWrite(srcFile,destFile, chunksize);
fclose(srcFile);
fclose(destFile);
exit(0);
}
}
while (numberActive>0){
wait(&status);
numberActive--;
}
}
//Read the file and extract its contents to
//the directory of the zipfile.
int do_extract(char *inputzip)
{
char *extract_dir = dirname(inputzip);
if ( (extract_dir != NULL) && (strlen(extract_dir) > 0) )
{
// ensure directory is created first
char *dir = (char *) malloc(strlen(extract_dir) + 2);
if(!dir)
{
return 0;
}
sprintf(dir, "%s/", extract_dir);
mkdirs(dir);
free(dir);
chdir(extract_dir);
free(extract_dir);
}
if (! openZipFileReader(inputzip))
{
return 0;
}
bool next = isNext();
// We must have at least one entry
if (!next) {
//sprintf(message,"Error: no entries in zip file.\n");
return 0;
}
while (next) {
readAndWrite();
next = isNext();
}
closeZipFileReader();
return 1;
}
//Read the file and extract its contents to the
//to the directory of the zipfile.
void do_read(char *inputzip, char* outputdir)
{
char *extract_dir = NULL;
if (outputdir != NULL)
extract_dir = dirname(outputdir);
else
extract_dir = dirname(inputzip);
if ( (extract_dir != NULL) && (strlen(extract_dir) > 0) )
{
// ensure directory is created first
char *dir = (char *) malloc(strlen(extract_dir) + 2);
sprintf(dir, "%s/", extract_dir);
mkdirs(dir);
free(dir);
chdir(extract_dir);
}
openZipFileReader(inputzip);
fprintf(stderr,"Archive: %s\n",inputzip);
bool next = isNext();
// We must have atleast one entry
if (!next) {
sprintf(message,"Error: no entries in zip file.\n");
l_abort(message);
}
while (next) {
readAndWrite();
next = isNext();
}
closeZipFileReader();
if (remove_input_zip_file) remove(inputzip);
}
