[code]unix advanced programing 获取文件类型

/*==========================================================

DESCRIPTION:print type of file for each commond-line argument

============================================================*/

#include<sys/stat.h>
#include<stdio.h>

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

  if( argc<2 ){
    printf( " argument is not enough\n " );
    return;
  }

  for( i=1; i<argc ; i++){
      printf( "%s:" , argv[i] );
      if( stat(argv[i] , &statbuffer)<0 ){
          perror( "stat function failed:" );
      }

      if( S_ISREG(statbuffer.st_mode) ){
          puts( "regular file\n" );
      }
      else if( S_ISDIR(statbuffer.st_mode) ){
          puts( "directory\n" );
      }
      else if( S_ISLNK(statbuffer.st_mode)){
          puts( "link file\n" );
      }
      else if( S_ISCHR(statbuffer.st_mode) ){
         puts( "character file\n" );
      }
      else if( S_ISBLK(statbuffer.st_mode) ){
         puts( "block device\n" );
      }
      else if( S_ISFIFO(statbuffer.st_mode) ){
         puts( "FIFO file\n" );
      }
      else if( S_ISSOCK(statbuffer.st_mode) ){
         puts( "socket file \n" );
      }
      else{
         puts( "unknown mode" );
      }

  }
  return 0;

}