Oh, the problem appears to be that read(2) and write(2) do not
abort with EINTR if the respective devices are fast enough ☹
Please try this patch:
Index: funcs.c
===================================================================
RCS file: /cvs/src/bin/mksh/funcs.c,v
retrieving revision 1.305
diff -u -p -r1.305 funcs.c
--- funcs.c 1 Aug 2016 21:38:02 -0000 1.305
+++ funcs.c 25 Aug 2016 16:19:19 -0000
@@ -3776,12 +3776,15 @@ c_cat(const char **wp)
/* end of file reached */
break;
while (n) {
+ if (intrsig)
+ goto has_intrsig;
if ((w = write(STDOUT_FILENO, cp, n)) != -1) {
n -= w;
cp += w;
continue;
}
if (errno == EINTR) {
+ has_intrsig:
restore_pipe(opipe);
/* give the user a chance to ^C out */
intrcheck();
** Changed in: mksh
Importance: Undecided => Low
** Changed in: mksh
Status: Confirmed => Fix Committed
** Changed in: mksh
Assignee: (unassigned) => Thorsten Glaser (mirabilos)
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https://bugs.launchpad.net/bugs/1616692
Title:
^C doesn't interrupt cat builtin when reading from /dev/zero
Status in mksh:
Fix Committed
Bug description:
bash$ ./mksh
$ cat < /dev/zero > /dev/null
^C^C^C^C^C^C^C
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