Re: use ftok to access shared memory

You may be interested in this thread which uses ftok from the module IPC::SysV.

As your code stands it can not possibly work - function calls don't interpolate. open( F, "./ftok $file_shmem 1 |" ); will attempt to open a file called "./ftok /tmp/IPC/shared_memory1 1 |", which is probably not what you expect.

DWIM is Perl's answer to Gödel

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Re^2: use ftok to access shared memory by polettix (Vicar) on Feb 15, 2006 at 10:04 UTC
The OP is using the pipe variant of `open()`. I presume that `./ftok` is a C program that reads (via `key_t ftok(const char pathname, int proj_id);`) the shared memory for `pathname` `/tmp/ICP/shared_memory` and `proj_id` `1`, sending stuff on STDOUT. Flavio perl -ple'$_=reverse' <<<ti.xittelop@oivalf Don't fool yourself.*	[reply] [d/l] [select]
Re^3: use ftok to access shared memory by earlati2 (Beadle) on Feb 15, 2006 at 11:00 UTC
It is as you guess. enzo@P0101222 shared_memory$ ./ftok /prd/b_BCM/dat/IPC/shared_memory1 1 101a3ce I read the value 101a3ce from the stdout But I'm looking for a better solution	[reply]