11-10-2008
Script to monitor forum
Hello. I am attempting to write a pretty complex script that monitors a forum and alerts me whenever a new post is made (this part of the script is done). I then want to have the script auto reply to the post with a predetermined message. The one catch here is this is a VERY popular forum. Within 10 seconds there will already be a reply to this post on the forums. I don't mind if I'm not the first post but when the order of the links change on the forum it makes it harder for me to conceptually script this. The script currently looks like this:
The first command, lynx -dump ...... monitors the forum so that it checks for a 0 followed by a space and then any number. This allows it to search for a reply count of 0 and and view count of 0-9. When it finds this it sends mail to myself, makes a pc tower sound, and makes a speaker sound. If it doesn't find a new post it simply prints the date and sleeps for 2 seconds. My problem is that I now need to have this auto reply a response to the new thread made. The output of the above statement (when a new post is found) looks like:
with no hyperlink given to follow. The first new thread on the forums is always the 36th link. My problem is that if someone responds to a thread that isn't the newest thread it then moves up to the 36th link (and the thread i want to respond to moves to 37. I need to find a way for my script to both check the forum and reply to the post (if there is a new one) without having to reload the webpage risking the link order to change.
Is this clear? Please help me!
Rob
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postwait(2) System Calls Manual postwait(2)
NAME
postwait: pw_getukid(), pw_wait(), pw_post(), pw_postv(), pw_getvmax() - lightweight synchronization mechanism
SYNOPSIS
DESCRIPTION
Postwait is a fast, lightweight sleep/wakeup mechanism that can be used for synchronization by cooperating kernel threads within a single
process or between separate processes.
A thread calls to block. It resumes execution when it is posted by another thread, the call expires, or is signaled. If one or more posts
are already pending, returns immediately.
Threads using postwait are identified by their ukid. A thread retrieves its ukid by calling It shares this ukid with anyone it chooses by
any means it considers appropriate (for example, shared memory).
is called with a timeout ts. If ts is NULL, the thread will not timeout. It will remain blocked until posted or a signal wakes it up.
If ts points to a zero-valued timespec, will return immediately with a value (and indicating whether or not it was posted.
If ts points to a timespec whose value is greater than zero, the thread will block for that amount of time unless it is posted or inter-
rupted by a signal, in which case the timespec pointed to by ts is updated with the remaining time. The return value and are set to indi-
cate the reason the call returned.
is used to post many threads with a single call. It posts to all threads in the targets array. An value for each target is returned in
the errors array. (0 indicates success.) If the errors pointer is zero, no target-specific errors are copied out.
There is a maximum number of threads that can be posted with a single call. This value is returned by
Posts sent to a kernel thread that already has a post pending against it are discarded.
RETURN VALUE
returns 0 if it succeeds, -1 otherwise.
returns 0 if posted, -1 otherwise.
returns 0 if the post succeeds, -1 otherwise.
returns 0 if every post succeeds, -1 otherwise.
returns the maximum number of kernel threads that can be posted with a single call to
ERRORS
sets to one of the following values if it fails:
ukid points to an illegal address. The reliable detection of this error is implementation dependent.
sets to one of the following values if it fails:
was called with a timeout of 0 but the caller has no post(s) pending.
was called with a timeout that expired.
ts points to an illegal address. The reliable detection of this error is implementation dependent.
was interrupted
by a signal.
The timespec pointed to by ts is invalid.
sets to one of the following values if it fails:
The ukid refers to a non-existent kernel thread.
sets to one of the following values if it fails:
targets points to an illegal address. The reliable detection of this error is implementation dependent.
errors points to an illegal address. The reliable detection of this error is implementation dependent.
count is less than 0.
count exceeds the maximum value (as returned by
A ukid refers to a non-existent kernel thread.
postwait(2)