From 37c80012f1415bc4ff23def735a87cbd395bca31 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Mon, 4 Mar 2019 23:11:39 -0500 Subject: [PATCH] fetch: avoid calling write_or_die() The write_or_die() function has one quirk that a caller might not expect: when it sees EPIPE from the write() call, it translates that into a death by SIGPIPE. This doesn't change the overall behavior (the program exits either way), but it does potentially confuse test scripts looking for a non-signal exit code. Let's switch away from using write_or_die() in a few code paths, which will give us more consistent exit codes. It also gives us the opportunity to write more descriptive error messages, since we have context that write_or_die() does not. Note that this won't do much by itself, since we'd typically be killed by SIGPIPE before write_or_die() even gets a chance to do its thing. That will be addressed in the next patch. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- fetch-pack.c | 9 ++++++--- pkt-line.c | 6 ++++-- 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/fetch-pack.c b/fetch-pack.c index 9691046e64..1dcb0f7cd7 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -189,8 +189,10 @@ static void send_request(struct fetch_pack_args *args, if (args->stateless_rpc) { send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX); packet_flush(fd); - } else - write_or_die(fd, buf->buf, buf->len); + } else { + if (write_in_full(fd, buf->buf, buf->len) < 0) + die_errno(_("unable to write to remote")); + } } static void insert_one_alternate_object(struct fetch_negotiator *negotiator, @@ -1178,7 +1180,8 @@ static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out, /* Send request */ packet_buf_flush(&req_buf); - write_or_die(fd_out, req_buf.buf, req_buf.len); + if (write_in_full(fd_out, req_buf.buf, req_buf.len) < 0) + die_errno(_("unable to write request to remote")); strbuf_release(&req_buf); return ret; diff --git a/pkt-line.c b/pkt-line.c index 04d10bbd03..9944c7c75d 100644 --- a/pkt-line.c +++ b/pkt-line.c @@ -88,13 +88,15 @@ static void packet_trace(const char *buf, unsigned int len, int write) void packet_flush(int fd) { packet_trace("0000", 4, 1); - write_or_die(fd, "0000", 4); + if (write_in_full(fd, "0000", 4) < 0) + die_errno(_("unable to write flush packet")); } void packet_delim(int fd) { packet_trace("0001", 4, 1); - write_or_die(fd, "0001", 4); + if (write_in_full(fd, "0001", 4) < 0) + die_errno(_("unable to write delim packet")); } int packet_flush_gently(int fd)