view release on metacpan or  search on metacpan

lib/POSIX/Overview.pod  view on Meta::CPAN

  abort        perlvar/%SIG
  alarm        perlfunc
  kill         perlfunc           ::Signals
  pause                           ::Signals
  psiginfo     not supported
  psignal      not supported
  raise                           ::Signals
  sigaction                       ::Signals
  sigaddset                       ::Signals
  sigdelset                       ::Signals
  sigemptyset                     ::Signals
  sigfillset                      ::Signals
  sigismember                     ::Signals
  signal       perlvar/%SIG       ::Signals
  sigpending                      ::Signals
  sigprocmask                     ::Signals
  sigsuspend                      ::Signals
  sigwait      not supported
  strsignal                       ::Signals

B<Warning>, parameter order in POSIX.pm

  CORE::kill($signal, $pid);
  ::Signals::kill($signal, $pid);
  POSIX::kill($pid, $signal);

=head2 Single Process Interfaces

  confstr                         ::Confstr
  environ     perlvar/%ENV
  errno       perlvar/$ERRNO      $!+0
  getenv      perlvar/%ENV        $ENV{PATH}
  setenv      perlvar/%ENV        $ENV{HOME} = '/tmp'
  sysconf                         ::Sysconf
  uname                           ::OS
  unsetenv    perlvar/%ENV        delete $ENV{PS1}

The error constants are provided by L<Errno|Errno>.

=head2 Symbolic Link Interfaces

  lchown                          ::FS
  lstat       perlfunc
  readlinkat  not supported
  readlink    perlfunc
  symlinkat   not supported
  symlink     perlfunc

B<Warning,> POSIX.pm accepts only one filename

  CORE::chown($uid, $gid, @filename);
  ::FS::lchown($uid, $gid, @symlinks);
  POSIX::lchown($uid, $gid, $symlink); # !!!

=head2 System Database Interfaces

  getgrgid    perlfunc            User::grent
  getgrnam    perlfunc            User::grent
  getpwnam    perlfunc            User::pwent
  getpwuid    perlfunc            User::pwent

=head2 Timer Interfaces

  clock_getres                    Time::HiRes POSIX::RT::Clock
  clock_gettime                   Time::HiRes POSIX::RT::Clock
  clock_settime                   Time::HiRes POSIX::RT::Clock
  nanosleep                       Time::HiRes POSIX::RT::Clock
  timer_create                    POSIX::RT::Timer
  timer_delete                    POSIX::RT::Timer
  timer_getoverrun                POSIX::RT::Timer
  timer_gettime                   POSIX::RT::Timer
  timer_settime                   POSIX::RT::Timer

=head2 User and Group Interfaces

Expect portability issues on this subject.  Better B<not use any of
these>, but use the abstract L<POSIX::1003::User> instead!

  cuserid                         ::Proc
  getegid     perlvar/$EGID $)    ::User
  geteuid     perlvar/$EUID $>    ::User
  getgid      perlvar/$GID  $(    ::User
  getgroups   perlvar/$GID  $(    ::User
  getlogin    perlfunc            ::User
  getuid      perlvar/$UID  $<    ::User    # warning
  setegid     perlvar/$EGID $)    ::User    # warning
  seteuid     perlvar/$EUID $>    ::User    # warning
  setgid      perlvar/$GID  $(    ::User    # warning
  setuid      perlvar/$UID  $<    ::User    # warning

B<Warning:> The special variables for user- and group-ids try to be smart:
they are implemented using C<getreuid> and/or friends.  POSIX.pm provides
C<setuid> and C<setgid> which simply call the special variables. So:
both do not offer access to the system functions with that name.

=head2 Wide Character Device Input and Output Interfaces

No useful support for wide characters, so no

  fgetwc, fgetws, fputwc, fputws, fwide, fwprintf, fwscanf,
  getwc, getwchar, putwc, putwchar, ungetwc, vfwprintf, vfwscanf,
  vwprintf, vwscanf, wprintf, wscanf

=head2 Process CPU-Time Clocks Interfaces

Probably unsupported:

  clock_getcpuclockid             POSIX::RT::Clock/get_cpuclock

=head2 File Synchronization Interfaces

  fsync                           IO::Handle/sync File::Sync

=head2 Memory Locking Interfaces

  mlockall                        IO::AIO
  munlockall                      IO::AIO
  mlock                           IO::AIO
  munlock                         IO::AIO