Linux系統命令ls -l的代碼實現

Linux系統下，對ls -l命令的代碼實現
就剩文件的顏色沒弄好，基本的功能已經實現了

#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>
#include <grp.h>
#include <pwd.h>
#include <time.h>
#include <stdlib.h>
#include "list_wan.h"				//自己寫的一個鏈表

//$blue = -e "\033[1;32mHello Linux\033[0m"

typedef struct Node
{
	char arr[100];
	char name[20];
}Node;

void get_stat(const char* name,Node* node)
{
	struct stat sta;
	stat(name,&sta);

	mode_t m = sta.st_mode;
	strcat(node->arr,S_IRUSR&m?"r":"-");
	strcat(node->arr,S_IWUSR&m?"w":"-");
	strcat(node->arr,S_IXUSR&m?"x":"-");
	
	strcat(node->arr,S_IRGRP&m?"r":"-");
	strcat(node->arr,S_IWGRP&m?"w":"-");
	strcat(node->arr,S_IXGRP&m?"x":"-");
							
	strcat(node->arr,S_IROTH&m?"r":"-");
	strcat(node->arr,S_IWOTH&m?"w":"-");
	strcat(node->arr,S_IXOTH&m?"x":"-");

	if(S_ISDIR(m))
	{
		int flag = 2;
		DIR* fl = opendir(name);
		for(struct dirent* dir = readdir(fl); NULL!=dir;)
		{
			if(dir->d_type==DT_DIR && dir->d_name[0]!='.')
			{
				flag++;
			}
			dir = readdir(fl);
		}
		char arr[5]={};
		sprintf(arr," %d",flag);
		strcat(node->arr,arr);
		closedir(fl);
	}
	else
	{
		strcat(node->arr," 1");
	}
	
	char arr[30]={};
	struct passwd* pas = getpwuid(sta.st_uid);
	sprintf(arr," %s",pas->pw_name);
	strcat(node->arr,arr);
	struct group* gro = getgrgid(sta.st_gid);
	sprintf(arr," %s",gro->gr_name);
	strcat(node->arr,arr);
	
	sprintf(arr," %5ld",sta.st_size);
	strcat(node->arr,arr);
	struct tm* temp = localtime(&sta.st_mtime);
	sprintf(arr," %2d月 %2d %02d:%02d ",temp->tm_mon+1,temp->tm_mday,temp->tm_hour,temp->tm_min);
	strcat(node->arr,arr);
}

void get_dir(struct dirent* dir,List* list)
{
	if(dir->d_name[0] == '.') return;

	Node* node = malloc(sizeof(Node));

	switch(dir->d_type)
	{
		case DT_BLK:
			sprintf(node->arr,"%s","b");break;
		case DT_CHR:
			sprintf(node->arr,"%s","c");break;
		case DT_DIR:
			sprintf(node->arr,"%s","d");break;
		case DT_FIFO:
			sprintf(node->arr,"%s","q");break;
		case DT_LNK:
			sprintf(node->arr,"%s","l");break;
		case DT_REG:
			sprintf(node->arr,"%s","-");break;
		case DT_SOCK:
			sprintf(node->arr,"%s","s");break;
		case DT_UNKNOWN:
			sprintf(node->arr,"%s","?");break;
	}
	get_stat(dir->d_name,node);
	sprintf(node->name,"%s",dir->d_name);
	add_tail_list(list,node);
}

int main(int argc,char *argv[])
{
	List* list = create_list();

	if(argc != 2 || strcmp("-l",argv[1]))
	{
		printf("User:./ls -l\n");
		return -1;
	}
	
	int temp = open("./",O_RDONLY);
	if(0 > temp)
	{
		perror("open");
		return -1;
	}
	
	DIR *fl = fdopendir(temp);
	
	for(struct dirent *dir=readdir(fl); NULL!=dir;)
	{
		get_dir(dir,list);
		dir = readdir(fl);
	}
	closedir(fl);
	
	int cmp(const void* ptr1,const void* ptr2)
	{
		const Node* node1 = ptr1;
		const Node* node2 = ptr2;
		return strcmp(node1->name,node2->name);
	}
	sort_list(list,cmp);

	void show(const void* ptr)
	{
		const Node* node = ptr;
		printf("%s",node->arr);
//		system("echo blue");
		printf("%s\n",node->name);
	}
	show_list(list,show);
}