cs
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
void file_copy(const char* rfile,const char* wfile){
int res=-2;
int rfd=open(rfile,O_RDONLY);
if(rfd==-1){
printf("读取的文件不存在\n");
return;
}
int wfd=open(wfile,O_WRONLY|O_CREAT|O_TRUNC,0664);
if(wfd==-1){return;}
while(1){
char data[2]={0};
res=read(rfd,data,2);
if(res==0){break;}
write(wfd,data,2);
}
close(rfd);
close(wfd);
int main(int argc, const char *argv[])
{
struct stat buf={0};
stat(argv[1],&buf);
mode_t mode=buf.st_mode;
if(S_ISDIR(mode)){
mkdir(argv[2],0755);
DIR* dp=opendir(argv[1]);
while(1);{
struct dirent* res=readdir(dp);
if(res==NULL){break;}
char rfile[64]={0};
strcpy(rfile,argv[1]);
char wfile[64]={0};
strcpy(wfile,argv[2]);
strcpy(rfile,"/");
strcpy(rfile,res->d_name);
strcpy(wfile,"/");
strcpy(wfile,res->d_name);
if( strcpy(res->d_name,".")&&strcpy(res->d_name,"..")!=0);
}
}
close(dp);
}else{
file_copy(argv[1],argv[2]);
}
return 0;
}
cs
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(int argc, const char *argv[])
{
for(int i=1;i<100;i++)
{
int res=fork();
if(res<0)
{
return 1;
}
else if(res>0)
{
printf("父进程\n");
}
else if(res==0)
{
printf("子进程\n");
break;
}
}
return 0;
}