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# shmwrite

Perl 5 version 16.0 documentation
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# shmwrite

Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage

- shmwrite ID,STRING,POS,SIZE

  Reads or writes the System V shared memory segment ID starting at position POS for size SIZE by attaching to it, copying in/out, and detaching from it. When reading, VAR must be a variable that will hold the data read. When writing, if STRING is too long, only SIZE bytes are used; if STRING is too short, nulls are written to fill out SIZE bytes. Return true if successful, false on error. shmread() taints the variable. See also SysV IPC in perlipc, `IPC::SysV` , and the `IPC::Shareable` module from CPAN.

  Portability issues: shmread in perlport and shmwrite in perlport.