Linux 下文件操作

 

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<fcntl.h>
#include<unistd.h>
#include<sys/stat.h>
#include<sys/dir.h>
#include<dirent.h>
#include <sys/types.h>
#define s 100

void treedisplay();
void treecreat();
void filecreatopen();
void fileread(char pathname[]);
void filewrite(char pathname[]);
void treeopen();
void treeback();
long treefilecopy(char copybuf[],char copyname[]);
void treefilepaste(int len,char pastebuf[],char copyname[]);
void treedelete();
void filedelete();
void treefileproperty();
void displayproperty();
void modifypurview(char pathname[]);
void treefilerename();
void changesize();
 
main()
{
  char copybuf[s],pastebuf[s],copyname[s];
  int len=0,tag=0,cord,i;

  do {printf("/n          mainmenu         /n");
      printf("    1     tree-display       /n");/*显示目录*/
      printf("    2     tree-creat         /n");/*目录创建*/
      printf("    3     file-creat/open    /n");/*打开文件进行读写*/
      printf("    4     tree-open          /n");/*改变当前目录*/
      printf("    5     tree-back          /n");/*返回上一级目录*/
      printf("    6     tree/file-copy     /n");
      printf("    7     tree/file-paste    /n");
      printf("    8     tree-delete        /n");
      printf("    9     file-delete        /n");
      printf("   10     tree/file-property /n");/*文件属性*/
      printf("   11     end                /n");
      printf("------------------------------/n");
      printf("input your choice(1-11)");
      scanf("%d",&cord);
      switch(cord)
 {case 1:{treedisplay();
                }break;
  case 2:{treecreat();
  }break;
  case 3:{filecreatopen();
  }break;
   case 4:{treeopen();
  }break;
   case 5:{treeback();
  }break;
  case 6:{len=treefilecopy(copybuf,copyname); tag=1;
   for(i=0;i<len;i++)pastebuf[i]=copybuf[i];
  }break;
  case 7:{if(tag&&len)treefilepaste(len,pastebuf,copyname);
   else   printf("paste failed/n");
  }break;
   case 8:{treedelete();
  }break;
   case 9:{filedelete();
  }break;
  case 10:{treefileproperty();
  }break;
  case 11:{system("clear");exit(0);
  }break;
 }
    }while(cord<=11);
}

void treedisplay()
{
 DIR *dir;char buf[s];
 struct dirent *ent;
 getcwd(buf,s);
 dir=opendir(buf);
 if( NULL == dir )
  return;
 while((ent=readdir(dir))!=NULL)
 puts(ent->d_name);
 closedir(dir);
}

void treecreat()
{
 int fd;char pathname[s];
 do{
 printf("new tree=");scanf("%s",pathname);
 fd=mkdir(pathname,O_CREAT);
 if(fd==-1)
  perror("creat failed,try again,the error");
 else
  {chmod(pathname,0777);
  printf("creat success!/n");
  }
 }while(fd==-1);
}

void filecreatopen()
{
 int fd;char ch,choose,pathname[s];
 printf("new/open file=");scanf("%s",pathname);
 fd=open(pathname,O_CREAT|O_APPEND|O_RDWR);
 if(fd==-1)
  {perror("filecreat/open failed,try again,the error");
  close(fd);return;
  }
 else
  {chmod(pathname,0777);
  printf("creat/open success!/n");
         fileread(pathname);
  }
 printf("/ninput the text?(y/n)");
 scanf("%c",&choose);
 scanf("%c",&choose);
 
 if(choose=='y')filewrite(pathname);
 fileread(pathname);
 close(fd);
}

void fileread(char pathname[])
{
 char ch;FILE *fp;
 fp=fopen(pathname,"r");
 ch=fgetc(fp);
 while(ch!=EOF)
  {putchar(ch);
  ch=fgetc(fp);
  }
 fclose(fp);
}

void filewrite(char pathname[])
{
 char ch;FILE *fp;long where;
 fp=fopen(pathname,"rb+");
 printf("input the where of write=");
 scanf("%ld",&where);
 fseek(fp,where,SEEK_SET);
 printf("'#' for the EOF,begin:/n");
 ch=getchar();
 while(ch!='#')
    {
    fwrite(&ch,1,1,fp);
  ch=getchar();
         }
 fclose(fp);
}

void treeopen()
{
 int fd;char pathname[s],buf[s];
 system("ls -l");
 printf("open tree=");scanf("%s",pathname);
 fd=chdir(pathname);
 if(fd==-1)
  {perror("treeopen failed,try again,the error");
   close(fd);return;
  }
 else     {
          system("ls -l");
          getcwd(buf,s);
          printf("%s/n",buf);
          printf("treeopen success!/n");
          }
}

void treeback()
{
 char buf[s];
 chdir("..");
 system("ls -l");
 getcwd(buf,s);
 printf("%s/n",buf);
}

long treefilecopy(char copybuf[],char copyname[])
{
 struct stat buf;int fd;
 long  size;/*off_t*/
 system("ls -l");
 printf("copy file/tree=");scanf("%s",copyname);
 fd=open(copyname,O_RDONLY);
 if(fd==-1)
  {perror("failed,try again,the error");
   return 0;
  }
 stat(copyname,&buf);
 size=buf.st_size;
 read(fd,copybuf,size);
 return  size;
}

void treefilepaste(int len,char pastebuf[],char copyname[])
{
 int fd;char pastename[]={"re-"};
 strcat(pastename,copyname);
 fd=open(pastename,O_CREAT|O_APPEND|O_RDWR);
 if(fd==-1)
  {perror("failed,try again,the error");
   return;
  }
 write(fd,pastebuf,len);
 system("ls -l");
}

void treedelete()
{
 int fd;char pathname[s];
 system("ls -l");
 printf("delete tree=");scanf("%s",pathname);
 fd=rmdir(pathname);
 if(fd==-1)
  {perror("treedelete failed,try again,the error");
   return;
  }
 else     {
          system("ls -l");
          printf("treedelete success!/n");
          }
}

void filedelete()
{
 int fd;char pathname[s];
 system("ls -l");
 printf("delete file=");scanf("%s",pathname);
 fd=unlink(pathname);
 if(fd==-1)
  {perror("filedelete failed,try again,the error");
   return;
  }
 else     {
          system("ls -l");
          printf("filedelete success!/n");
          }
}

void treefileproperty()
{
  int cord;char choose;
  do { printf("/n          treefileproperty /n");
       printf("    1     display-property   /n");
       printf("    2     tree/file-rename   /n");
       printf("    3     file-chsize        /n");
       printf("    4     back mainmenu      /n");
       printf("------------------------------/n");
       printf("input your choice(1-4)");
       scanf("%d",&cord);
       switch(cord)
  {case 1:{displayproperty();
   }break;
          case 2:{treefilerename();
   }break;
      case 3:{changesize();
   }break;
    case 4:{system("clear");return;
   }break;
      }
     }while(cord<=3);
}

void displayproperty()
{
 struct stat buf;
 mode_t mode;
 int fd;char pathname[s],choose;
 system("ls -l");
 printf("file/tree=");scanf("%s",pathname);
 fd=open(pathname,O_RDWR);
 if(fd==-1)
  {perror("failed,try again,the error");
   return;
  }
 stat(pathname,&buf);
 mode=buf.st_mode;
 printf("%-10s","mode:");
 printf("%10s","read");printf("%10s","write");
 printf("%10s","execute/n");printf("%10s","all user");
 if((mode&0400)==S_IRUSR)printf("%10s","true");
 else printf("%10s","false");
 if((mode&0200)==S_IWUSR)printf("%10s","true");
 else printf("%10s","false");
 if((mode&0100)==S_IXUSR)printf("%10s","true/n");
 else printf("%10s","false/n");
 printf("%10s","group");
 if((mode&040)==S_IRGRP)printf("%10s","true");
 else printf("%10s","false");
 if((mode&020)==S_IWGRP)printf("%10s","true");
 else printf("%10s","false");
 if((mode&010)==S_IXGRP)printf("%10s","true/n");
 else printf("%10s","false/n");
 printf("%10s","other user");
 if((mode&04)==S_IROTH)printf("%10s","true");
 else printf("%10s","false");
 if((mode&02)==S_IWOTH)printf("%10s","true");
 else printf("%10s","false");
 if((mode&01)==S_IXOTH)printf("%10s","true/n");
 else printf("%10s","false/n");
 printf("sizeld/n",buf.st_size);
 printf("BLK sizeld/n",buf.st_blksize);
 
 printf("modify the purview?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y')modifypurview(pathname);
}

void modifypurview(char pathname[])
{
 char choose;int c=0;
 printf("all user read?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+0400;chmod(pathname,c);}
 printf("all user write?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+0200;chmod(pathname,c);}
 printf("all user execute?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+0100;chmod(pathname,c);}
 printf("group read?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+040;chmod(pathname,c);}
 printf("group write?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+020;chmod(pathname,c);}
 printf("group execute?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+010;chmod(pathname,c);}
 printf("other user read?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+04;chmod(pathname,c);}
 printf("other user write?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+02;chmod(pathname,c);}
 printf("other user execute?(y/n)");
 scanf("%c",&choose);scanf("%c",&choose);
 if(choose=='y'){c=c+01;chmod(pathname,c);}
 if(!c)chmod(pathname,c);
 displayproperty();
}

void treefilerename()
{
 char oldname[s],newname[s];int fd;
 system("ls -l");
 printf("old name=");scanf("%s",oldname);
 printf("new name=");scanf("%s",newname);
 fd=rename(oldname,newname);
 if(fd==-1)
  {perror("rename failed,try again,the error");
  return;
  }
 else     {
          system("ls -l");
          printf("rename success!/n");
          }
}

void changesize()
{ 
  int fd,size;char pathname[s];
   printf("change file=");scanf("%s",pathname);
   printf("change size=");scanf("%d",&size);
   fd=truncate(pathname, size);
   if(fd==-1)perror("failed,try again,the error");
   else    printf("success!/n");
}