Linux system programming

• Process management
• File I/O
• Directory I/O
• Device I/O
• Pipes

• Signals
• POSIX IPC
• Sockets
• Daemonising
• POSIX pthreads

Bekijk meer onderwerpenBekijk minder onderwerpen

• Process management
  • Process creation, process transformation and process synchronisation. Influencing scheduling priority. Enquire and modify process limits. Enquire and modify process capabilities. Safe use of setuid bit and capabilities on executable file. System calls: fork, execl, execv, exit, wait, waitpid, sched_setscheduler, nice, setpriority, getrlimit, setrlimit, getpid, getppid, cap_get_proc, cap_set_proc, cap_free, cap_set_flag, getuid, setuid, seteuid.
• File I/O
  • System calls to create, open, read and write files, and system call to manipulate with the current offset of an opened file. Influence of various options when opening a file. Manipulate with file descriptors. Alternative access on files via memory mapping. Enquire and modify file properties. Monitor modifications on files and directories. File and record locking. System calls: open, creat, close, umask, read, write, lseek, fcntl, dup, mmap, munmap, stat, access, truncate, link, unlink, symlink, readlink, chmod, chown, utime, inotify_init, inotify_add_watch.
• Directory I/O
  • Enquire file names from directories. Enquire and modify current directory. Create and remove directories. System calls and functions: opendir, readdir, rewinddir, mkdir, rmdir, chdir, getcwd.
• Device I/O
  • Enquire and modify device properties. I/O multiplexing (monitor multiple file descriptors simultaneously). System calls: ioctl, select.
• Pipes
  • Setup new pipes. Properties of pipes. Communication via pipes. Pipes with more than one reader and/or writer. Properties and use of named pipes (fifo files) System calls and functions: pipe, mknod, mkfifo.

• Signals
  • Signal types. Sending conventional signals and realtime signals. Use of timers. Signal handling in a conventional way. Block and release signals by receiveing process (reliable). System calls: kill, signal, pause, alarm, getitimer, setitimer, sigprocmask, sigaction, sigpending, sigsuspend.
• POSIX IPC
  • Setup and gain access to shared memory segments. Synchronise processes/threads with semaphores. Send en receive messages between processes via message queues. System calls: shm_open, shm_unlink, sem_open, sem_close, sem_unlink, sem_post, sem_wait, sem_post, sem_init, sem_destroy, mq_open, mq_close, mq_send, mq_receive, mq_setattr, mq_getattr.
• Sockets
  • The socket API. Streams sockets versus datagram sockets. Client-server model. Setup of active socket from client process. Setup of passive socket from server proces. Socket domains and addresses. UNIX domain sockets. TCP/IP sockets (TCP and UDP communication). Translate host names and service names to address info (for IPv4 and for IPv6). Sending broadcasts. System calls and functions: socket, connect, bind, listen, accept, getaddrinfo, recvfrom, sendto.
• Daemonising
  • Relations between processes (sessions, process groups, controlling tty). Sequence of actions that allow permanently active processes to run autonomously. System calls and functions: getsid, setsid, getpgrp, setpgid.
• POSIX pthreads
  • Thread model used by Linux (tasks, thread group). Thread creation and termination (voluntary or forced). Synchronisation of threads with help of mutexes and condition variables. Use of global variables. Use of thread-safe system calls and functions. Attributes of a thread. Per-thread variables. Threads and signals. Consequences for specific Linux system calls. System calls and functions: clone, pthread_create, pthread_self, pthread_equal, pthread_exit, pthread_cancel, pthread_setcancelstate, pthread_testcancel, pthread_join, pthread_detach, pthread_mutex_lock, pthread_mutex_unlock, pthread_mutex_trylock, pthread_cond_wait, pthread_cond_timedwait, pthread_cond_signal, pthread_cond_broadcast, pthread_attr_…, pthread_sigmask, pthread_cleanup_push, pthread_cleanup_pop, pthread_key_create, pthread_key_getspecific, pthread_key_setspecific..