03-31-2013
That you can see their output means they're not being redirected properly.
You must dup2 the read-end of the previous pipe over the stdin of the process, and dup2 the write-end of the next pipe over the stdout of the process, for it to be part of the pipe chain. Otherwise its output will go direct to the terminal like everything else.
You must also close all original pipes in the child, leaving only the duplicates, or they may freeze when they're done instead of quitting.
Try simplifying your example. Right now it's very large and complex. Try something that just uses arrays for input instead of a full parser, then add it back on once you get it to work.
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LEARN ABOUT CENTOS
drop_text_search_template
DROP TEXT SEARCH
TEMPLATE(7) PostgreSQL 9.2.7 Documentation DROP TEXT SEARCH TEMPLATE(7)
NAME
DROP_TEXT_SEARCH_TEMPLATE - remove a text search template
SYNOPSIS
DROP TEXT SEARCH TEMPLATE [ IF EXISTS ] name [ CASCADE | RESTRICT ]
DESCRIPTION
DROP TEXT SEARCH TEMPLATE drops an existing text search template. You must be a superuser to use this command.
PARAMETERS
IF EXISTS
Do not throw an error if the text search template does not exist. A notice is issued in this case.
name
The name (optionally schema-qualified) of an existing text search template.
CASCADE
Automatically drop objects that depend on the text search template.
RESTRICT
Refuse to drop the text search template if any objects depend on it. This is the default.
EXAMPLES
Remove the text search template thesaurus:
DROP TEXT SEARCH TEMPLATE thesaurus;
This command will not succeed if there are any existing text search dictionaries that use the template. Add CASCADE to drop such
dictionaries along with the template.
COMPATIBILITY
There is no DROP TEXT SEARCH TEMPLATE statement in the SQL standard.
SEE ALSO
ALTER TEXT SEARCH TEMPLATE (ALTER_TEXT_SEARCH_TEMPLATE(7)), CREATE TEXT SEARCH TEMPLATE (CREATE_TEXT_SEARCH_TEMPLATE(7))
PostgreSQL 9.2.7 2014-02-17 DROP TEXT SEARCH TEMPLATE(7)