Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Processus et démons sous Unix/Linux

Processus et démons sous Unix/Linux

Jérémy Lecour

April 04, 2014
Tweet

More Decks by Jérémy Lecour

Other Decks in Technology

Transcript

  1. processus Signal Value Action Comment ------------------------------------------------------------------------- SIGHUP 1 Term Hangup

    detected on controlling terminal or death of controlling process SIGINT 2 Term Interrupt from keyboard SIGQUIT 3 Core Quit from keyboard SIGILL 4 Core Illegal Instruction SIGABRT 6 Core Abort signal from abort(3) SIGFPE 8 Core Floating point exception SIGKILL 9 Term Kill signal SIGSEGV 11 Core Invalid memory reference SIGPIPE 13 Term Broken pipe: write to pipe with no readers SIGALRM 14 Term Timer signal from alarm(2) SIGTERM 15 Term Termination signal SIGUSR1 30,10,16 Term User-defined signal 1 SIGUSR2 31,12,17 Term User-defined signal 2 SIGCHLD 20,17,18 Ign Child stopped or terminated SIGCONT 19,18,25 Cont Continue if stopped SIGSTOP 17,19,23 Stop Stop process SIGTSTP 18,20,24 Stop Stop typed at tty SIGTTIN 21,21,26 Stop tty input for background process SIGTTOU 22,22,27 Stop tty output for background process
  2. 1. exit if fork 2. Process.setsid 3. exit if fork

    4. Dir.chdir "/" 5. STDIN.reopen "/dev/null" 6. STDOUT.reopen "/dev/null", "a" 7. STDERR.reopen "/dev/null", "a"
  3. 1. exit if fork 2. Process.setsid 3. exit if fork

    4. Dir.chdir "/" 5. STDIN.reopen "/dev/null" 6. STDOUT.reopen "/dev/null", "a" 7. STDERR.reopen "/dev/null", "a"
  4. 1. exit if fork 2. Process.setsid 3. exit if fork

    4. Dir.chdir "/" 5. STDIN.reopen "/dev/null" 6. STDOUT.reopen "/dev/null", "a" 7. STDERR.reopen "/dev/null", "a"
  5. 1. exit if fork 2. Process.setsid 3. exit if fork

    4. Dir.chdir "/" 5. STDIN.reopen "/dev/null" 6. STDOUT.reopen "/dev/null", "a" 7. STDERR.reopen "/dev/null", "a"
  6. 1. exit if fork 2. Process.setsid 3. exit if fork

    4. Dir.chdir "/" 5. STDIN.reopen "/dev/null" 6. STDOUT.reopen "/dev/null", "a" 7. STDERR.reopen "/dev/null", "a"
  7. 1. exit if fork 2. Process.setsid 3. exit if fork

    4. Dir.chdir "/" 5. STDIN.reopen "/dev/null" 6. STDOUT.reopen "/dev/null", "a" 7. STDERR.reopen "/dev/null", "a"