do not mask SIGINT in dc when reading from stdin (#697340)

bc-1.06.95-sigintmasking.patch

@@ -0,0 +1,27 @@
+Binary files bc-1.06.95-orig/dc/.dc.c.swp and bc-1.06.95/dc/.dc.c.swp differ
+diff -urNp bc-1.06.95-orig/dc/eval.c bc-1.06.95/dc/eval.c
+--- bc-1.06.95-orig/dc/eval.c	2006-06-04 13:04:40.000000000 +0200
++++ bc-1.06.95/dc/eval.c	2011-09-08 15:11:48.815060585 +0200
+@@ -661,7 +661,9 @@ dc_evalfile DC_DECLARG((fp))
+ 	int next_negcmp = 0;
+ 	dc_data datum;
+ 
+-	signal(SIGINT, dc_trap_interrupt);
++    /* Do not mask SIGINT when running from stdin */
++	if (fp != stdin)
++      signal(SIGINT, dc_trap_interrupt);
+ 	stdin_lookahead = EOF;
+ 	for (c=getc(fp); c!=EOF; c=peekc){
+ 		peekc = getc(fp);
+diff -urNp bc-1.06.95-orig/doc/dc.texi bc-1.06.95/doc/dc.texi
+--- bc-1.06.95-orig/doc/dc.texi	2006-06-11 10:15:54.000000000 +0200
++++ bc-1.06.95/doc/dc.texi	2011-09-08 15:09:37.032059798 +0200
+@@ -126,6 +126,8 @@ To exit, use @samp{q}.
+ (or whatever other keystroke your system uses to generate a @code{SIGINT})
+ does not exit;
+ it is used to abort macros that are looping, etc.
++This is not true if running on stdin to prevent accidental user confusion
++about @kbd{C-c} unfunctionality.
+ 
+ A reverse-polish calculator stores numbers on a stack.
+ Entering a number pushes it on the stack.

bc.spec

@@ -1,7 +1,7 @@
 Summary: GNU's bc (a numeric processing language) and dc (a calculator)
 Name: bc
 Version: 1.06.95
-Release: 3%{?dist}
+Release: 4%{?dist}
 License: GPLv2+
 URL: http://www.gnu.org/software/bc/
 Group: Applications/Engineering
@@ -9,6 +9,7 @@ Source: ftp://alpha.gnu.org/pub/gnu/bc/bc-%{version}.tar.bz2
 Patch1: bc-1.06-dc_ibase.patch
 Patch2: bc-1.06.95-memleak.patch
 Patch3: bc-1.06.95-matlib.patch
+Patch4: bc-1.06.95-sigintmasking.patch
 Requires(post): /sbin/install-info
 Requires(preun): /sbin/install-info
 Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@@ -28,6 +29,7 @@ if you would like to use its text mode calculator.
 %patch1 -p1 -b .dc_ibase
 %patch2 -p1 -b .memleak
 %patch3 -p1 -b .matlib
+%patch4 -p1 -b .sigintmask
 
 %build
 %configure --with-readline
@@ -67,6 +69,9 @@ fi
 %{_infodir}/*
 
 %changelog
+* Thu Sep 08 2011 Ondrej Vasik <ovasik@redhat.com> 1.06.95-4
+- do not mask SIGINT in dc when reading from stdin (#697340)
+
 * Mon Feb 07 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.06.95-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild