fchown.c raw

   1  #include <unistd.h>
   2  #include <errno.h>
   3  #include <fcntl.h>
   4  #include "syscall.h"
   5  
   6  int fchown(int fd, uid_t uid, gid_t gid)
   7  {
   8  	int ret = __syscall(SYS_fchown, fd, uid, gid);
   9  	if (ret != -EBADF || __syscall(SYS_fcntl, fd, F_GETFD) < 0)
  10  		return __syscall_ret(ret);
  11  
  12  	char buf[15+3*sizeof(int)];
  13  	__procfdname(buf, fd);
  14  #ifdef SYS_chown
  15  	return syscall(SYS_chown, buf, uid, gid);
  16  #else
  17  	return syscall(SYS_fchownat, AT_FDCWD, buf, uid, gid, 0);
  18  #endif
  19  
  20  }
  21