Signal handling cleanup and improved safety

Fixes issue where you couldn't control-C out of a loop (https://github.com/ridiculousfish/fishfish/issues/13)
Also stops doing memory allocation in the signal handler (oops) https://github.com/ridiculousfish/fishfish/issues/27

1 files changed, 3 insertions, 1 deletions

diff --git a/proc.h b/proc.h
index ae8a8543..a52a1995 100644
--- a/proc.h
+++ b/proc.h
@@ -433,7 +433,9 @@ typedef std::list<job_t *> job_list_t;
 
 bool job_list_is_empty(void);
 
-/** A class to aid iteration over jobs list */
+/** A class to aid iteration over jobs list.
+    Note this is used from a signal handler, so it must be careful to not allocate memory.
+*/
 class job_iterator_t {
     job_list_t * const job_list;
     job_list_t::iterator current, end;