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authorJeff King <peff@peff.net>2009-01-22 06:02:35 (GMT)
committerJunio C Hamano <gitster@pobox.com>2009-01-22 06:46:52 (GMT)
commit4a16d072723b48699ea162da24eff05eba298834 (patch)
tree04d834214e8448f254118278ec057c77e3f8f1f1 /.gitignore
parent479b0ae81c9291a8bb8d7b2347cc58eeaa701304 (diff)
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chain kill signals for cleanup functions
If a piece of code wanted to do some cleanup before exiting (e.g., cleaning up a lockfile or a tempfile), our usual strategy was to install a signal handler that did something like this: do_cleanup(); /* actual work */ signal(signo, SIG_DFL); /* restore previous behavior */ raise(signo); /* deliver signal, killing ourselves */ For a single handler, this works fine. However, if we want to clean up two _different_ things, we run into a problem. The most recently installed handler will run, but when it removes itself as a handler, it doesn't put back the first handler. This patch introduces sigchain, a tiny library for handling a stack of signal handlers. You sigchain_push each handler, and use sigchain_pop to restore whoever was before you in the stack. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to '.gitignore')
-rw-r--r--.gitignore1
1 files changed, 1 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
index d9adce5..f28a54d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -152,6 +152,7 @@ test-match-trees
test-parse-options
test-path-utils
test-sha1
+test-sigchain
common-cmds.h
*.tar.gz
*.dsc