open

• SYNOPSIS
  int open( const char *pathname, int flags);
• DESCRIPTION
  The open() is used to get a file descriptor by passing pathname. The file descriptor will be used for such as read and write system calls. The pathname will be defined as " /dev/ppci0", " /dev/ppci1", " /dev/ppci2" and " /dev/ppci3". The flag is one of O_RDONLY, O_WRONLY or O_RDWR while O_RDWR is usually used and means that the device can be read and written.
• RETURN VALUE
  open() returns the new file descriptor, or -1 if an error occurred, in which case, errno is set appropriately.
• ERRORS