path: root/sigchain.h
AgeCommit message (Collapse)Author
2019-11-18sigchain: move doc to sigchain.hHeba Waly
Move the documentation from Documentation/technical/api-sigchain.txt to sigchain.h as it's easier for the developers to find the usage information beside the code instead of looking for it in another doc file. Also documentation/technical/api-sigchain.txt is removed because the information it has is now redundant and it'll be hard to keep it up to date and synchronized with the documentation in the header file. Signed-off-by: Heba Waly <> Signed-off-by: Junio C Hamano <>
2015-12-16sigchain: add command to pop all common signalsStefan Beller
The new method removes all common signal handlers that were installed by sigchain_push. CC: Jeff King <> Signed-off-by: Stefan Beller <> Signed-off-by: Junio C Hamano <>
2009-01-22refactor signal handling for cleanup functionsJeff King
The current code is very inconsistent about which signals are caught for doing cleanup of temporary files and lock files. Some callsites checked only SIGINT, while others checked a variety of death-dealing signals. This patch factors out those signals to a single function, and then calls it everywhere. For some sites, that means this is a simple clean up. For others, it is an improvement in that they will now properly clean themselves up after a larger variety of signals. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
2009-01-22chain kill signals for cleanup functionsJeff King
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 <> Signed-off-by: Junio C Hamano <>