file manager

file_manager.c

#include <stdio.h>
#include <stdlib.h> // for system xxx

#include <string.h>

#include <sys/stat.h> // for int mkdir(const char *path, mode_t mode);

#define MATCH(a,b) (strcmp(a,b) == 0)
void fdel(const char * name);
void fadd(const char * name);
void frname(const char * dest , const char * src);
int dadd(const char * name);

void fdel(const char * name)
{
	unlink(name);
}

//EACCES Search permission is denied on a component of the path prefix, or write permission is denied on the parent directory of the directory to be created.
//EEXIST The named file exists.
//ELOOP  A loop exists in symbolic links encountered during resolution of the path argument.
//EMLINK The link count of the parent directory would exceed {LINK_MAX}.
//ENAMETOOLONG The length of the path argument exceeds {PATH_MAX} or a pathname component is longer than {NAME_MAX}.
//ENOENT A component of the path prefix specified by path does not name an existing directory or path is an empty string.
//ENOSPC The file system does not contain enough space to hold the contents of the new directory or to extend the parent directory of the new directory.
//ENOTDIR A component of the path prefix is not a directory.
//EROFS  The parent directory resides on a read-only file system.
//The mkdir() function may fail if:
//ELOOP  More than {SYMLOOP_MAX} symbolic links were encountered during resolution of the path argument.
//ENAMETOOLONG As a result of encountering a symbolic link in resolution of the path argument, the length of the substituted pathname string exceeded {PATH_MAX}.
int dadd(const char * name)
{
	int nameLen = strlen(name);
	if(nameLen == 0 ) return;
	char * dir = (char * )malloc(sizeof(char) * (nameLen+1));
	memcpy(dir,name,sizeof(char) * (nameLen+1));
	int i = nameLen - 1;
	for(;i > 0 ; i --)
	{
		if(dir[i] == '/' || dir[i] == '\\')
		{
			dir[i] = '\0';
			int status = dadd(dir);
			if(status != 0)
			{
				fprintf(stderr,"ERROR : %d",status);
			}
			break;	
		}
	}
	free(dir);	
	printf("add :[%s]\n",name);
	return mkdir(name,S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
}


void fadd(const char * name)
{
	int nameLen = strlen(name);
	if(nameLen == 0 ) return;
	char * dir = (char * )malloc(sizeof(char) * (nameLen+1));
	memcpy(dir,name,sizeof(char) * (nameLen+1));
	int i = nameLen - 1;
	for(;i > 0 ; i --)
	{
		if(dir[i] == '/' || dir[i] == '\\')
		{
			dir[i] = '\0';
			int status = dadd(dir);
			if(status != 0)
			{
				fprintf(stderr,"ERROR : %d",status);
			}
			break;	
		}
	}
	free(dir);
	
	FILE *fp = fopen(name,"r");
	if(fp == NULL)
	{
		fp = fopen(name,"w");
	}
	if(fp != NULL) fclose(fp);
}

void frname(const char * dest , const char * src)
{
	rename(src,dest);
}


////////////////////////////////////////////////////////////////////////////////
void remove_file()
{
	fdel("x/dir/abc.txt");
	fdel("x/dir/def.txt");
}

void touch_file()
{
	fadd("x/dir/abc.txt");
}
void do_rename()
{
	frname("x/dir/def.txt","x/dir/abc.txt");
	
}

int main(int argc ,char *argv[])
{
	int i;
	if(argc == 1)
	{
		touch_file();
		do_rename();
		remove_file();
	}else
	{
			
		for(i=0;i<argc;i++)
		{
			if(MATCH(argv[i],"remove")) remove_file();
			if(MATCH(argv[i],"touch")) touch_file();
			if(MATCH(argv[i],"rename")) do_rename(); 
		}
	
	}
	return 0;
}