From: Charles McGarvey <cmcgarvey@bluehost.com>
Date: Sun, 17 Jun 2018 21:58:06 +0000 (-0600)
Subject: add SIGPIPE slides
X-Git-Url: https://git.dogcows.com/gitweb?a=commitdiff_plain;h=309c1da6df9319b3bcd760fd3073bafeda9faf09;p=chaz%2Ftalk-event-driven-programming-in-perl

add SIGPIPE slides
---

diff --git a/css/slides.css b/css/slides.css
index abeeb12..e32cb10 100644
--- a/css/slides.css
+++ b/css/slides.css
@@ -60,3 +60,11 @@
     font-size: 38px;
 }
 
+.sigpipe ul {
+    font-size: 34px;
+}
+.ex-sigpipe .perl {
+    font-size: 38px;
+}
+
+
diff --git a/notes.txt b/notes.txt
index 0d32c72..6b732a6 100644
--- a/notes.txt
+++ b/notes.txt
@@ -27,10 +27,10 @@ X kernel facilities (poll, select, etc.)
 - Mojo::IOLoop
 
 6. Special considerations
-- Exceptions in event-driven code.
-- SIGPIPE, EPIPE - might have more to do with long-lived processes rather than
+X Exceptions in event-driven code.
+X SIGPIPE, EPIPE - might have more to do with long-lived processes rather than
   just event-driven programming, but still something to watch out for...
-- You should almost always check the return code of your syscalls to see if they succeeded or not.
+X You should almost always check the return code of your syscalls to see if they succeeded or not.
 
 7. Promises:
 - Future
diff --git a/slides.html b/slides.html
index 6d589b4..51f9101 100644
--- a/slides.html
+++ b/slides.html
@@ -498,6 +498,39 @@ $promise->on_fail(sub { ... });
 ---
 class: center, middle
 
+## `SIGPIPE`
+
+---
+class: sigpipe
+## `SIGPIPE`
+
+- Sent to your program when it writes to a pipe that was closed.
+
+--
+- Default signal handler terminates the program.
+
+---
+class: ex-sigpipe
+
+## Solution: Ignore `SIGPIPE`
+
+```perl
+$SIG{PIPE} = 'IGNORE';
+```
+
+???
+Some event loops do this for you.
+
+--
+.big[
+Look for `EPIPE` from syscalls (like [`write`](http://man.he.net/man2/write)) instead.
+
+(You *are* checking return codes from your system calls... right?)
+]
+
+---
+class: center, middle
+
 ## Use [`Future::AsyncAwait`](https://metacpan.org/pod/Future::AsyncAwait).
 
 ???