簡単なcpコマンドを実現

#include
#include
#include
#include
#include
#include
#include

int copyAFileToAnother(char* oFile,char* tFile)
{
	struct stat oFileStat;
	int fileSize;
	int oFileHandle,tFileHandle;
	char* buffer;

	stat(oFile,&oFileStat);
	fileSize=oFileStat.st_size;
	
	buffer = (char *)malloc(fileSize+1);

	oFileHandle = open(oFile,O_RDONLY);
	read(oFileHandle,buffer,fileSize);

	tFileHandle = open(tFile,O_RDWR|O_CREAT,0644);
	write(tFileHandle,buffer,fileSize);

	close(tFileHandle);
	free(buffer);
	close(oFileHandle);
}

int copyFileToDirectory(char* file,char* directory)
{
	int dirLen = strlen(directory);	
	int fileNameLen = strlen(file);
	char* tFile;

	if(directory[dirLen-1]!='/')
	{
		tFile = (char *)malloc(fileNameLen+dirLen+2);
		strcpy(tFile,directory);
		tFile[dirLen]='/';
		strcpy(tFile+dirLen+1,file);
	}else
	{
		tFile = (char *)malloc(fileNameLen+dirLen+1);
		strcpy(tFile,directory);
		strcpy(tFile+dirLen,file);
	}
	printf("%s

%s

",file,tFile);
	copyAFileToAnother(file,tFile);
}

int main(int argc,char* argv[])
{
	struct stat tFileStat;

	stat(argv[2],&tFileStat);

	if((tFileStat.st_mode&S_IFMT)==S_IFREG)
		copyAFileToAnother(argv[1],argv[2]);	
	else if((tFileStat.st_mode&S_IFMT)==S_IFDIR)
		copyFileToDirectory(argv[1],argv[2]);
	else printf("This file can not be handled.
");

}

#include
#include
#include
#include
#include
#include
#include
#include
#include

#define NAME_MAX_LENGTH=100;

void getLastSlashElement(const char * path,char * element)
{
	int len = strlen(path);
	int headIndex=len-2,tailIndex=(path[len-1]=='/'?len-1:len);

	while(headIndex>=0 && path[headIndex]!='/')
		headIndex--;
	
	headIndex++;
	int index;

	for(index=0;index+headIndexd_name,".")&&strcmp(dp->d_name,".."))
			{
				strcpy(newOName+oDirLen+1,dp->d_name);
				printf("newOName:%s  newTDir:%s
",newOName,newTDir);
				recursiveDemo(newOName,newTDir);
			}

		free(newOName);
		closedir(oFile);
		free(newTDir);
		free(simpleDirName);
	}
}

void recursiveCopy(char* arg1,char* arg2)
{
	struct stat tFileStat;
	stat(arg2,&tFileStat);

	if((tFileStat.st_mode&S_IFMT)!=S_IFDIR)
	{
		printf("The target must be a directory! exit
");
		return;
	}
	
	recursiveDemo(arg1,arg2);
}

int main(int argc,char* argv[])
{
	if(strcmp(argv[1],"-r")==0)
		recursiveCopy(argv[2],argv[3]);
	else 
		nonRecursiveCopy(argv[1],argv[2]);
}