fetch-pack: isolate sigpipe in demuxer thread

In commit 9ff18fa (fetch-pack: ignore SIGPIPE in sideband
demuxer, 2016-02-24), we started using sigchain_push() to
ignore SIGPIPE in the async demuxer thread. However, this is
rather clumsy, as it ignores SIGPIPE for the entire process,
including the main thread. At the time we didn't have any
per-thread signal support, but we now we do. Let's use it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/fetch-pack.c b/fetch-pack.c
index f96f6dfb35afb419ac38fcec9b4013fbf0e6d36d..b501d5c320a5117020a934a50fce2a356b0c2f0e 100644 (file)
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -15,7 +15,6 @@
 #include "version.h"
 #include "prio-queue.h"
 #include "sha1-array.h"
-#include "sigchain.h"
 
 static int transfer_unpack_limit = -1;
 static int fetch_unpack_limit = -1;
@@ -674,10 +673,8 @@ static int sideband_demux(int in, int out, void *data)
        int *xd = data;
        int ret;
 
-       sigchain_push(SIGPIPE, SIG_IGN);
        ret = recv_sideband("fetch-pack", xd[0], out);
        close(out);
-       sigchain_pop(SIGPIPE);
        return ret;
 }
 
@@ -701,6 +698,7 @@ static int get_pack(struct fetch_pack_args *args,
                demux.proc = sideband_demux;
                demux.data = xd;
                demux.out = -1;
+               demux.isolate_sigpipe = 1;
                if (start_async(&demux))
                        die("fetch-pack: unable to fork off sideband"
                            " demultiplexer");