From cd591dbccd185c8c271f5ee5e01bf7325e370582 Mon Sep 17 00:00:00 2001 From: Helmut Eller Date: Thu, 25 Mar 2010 17:48:52 +0900 Subject: [PATCH] Call `select' for interrupted `connect' rather than creating new socket (Bug#5173). --- src/ChangeLog | 5 +++++ src/process.c | 37 ++++++++++++++++++++++++++++++++----- 2 files changed, 37 insertions(+), 5 deletions(-) diff --git a/src/ChangeLog b/src/ChangeLog index a2e5262c02b..870c805a92c 100644 --- a/src/ChangeLog +++ b/src/ChangeLog @@ -1,3 +1,8 @@ +2010-03-25 Helmut Eller + + * process.c (Fmake_network_process): Call `select' for interrupted + `connect' rather than creating new socket (Bug#5173). + 2010-03-24 Jan Djärv * frame.c (x_get_arg): Handle RES_TYPE_BOOLEAN_NUMBER (bug #5736). diff --git a/src/process.c b/src/process.c index 5d2d64e3ddc..789befc2a6b 100644 --- a/src/process.c +++ b/src/process.c @@ -3534,8 +3534,6 @@ usage: (make-network-process &rest ARGS) */) { int optn, optbits; - retry_connect: - s = socket (lres->ai_family, lres->ai_socktype, lres->ai_protocol); if (s < 0) { @@ -3652,6 +3650,38 @@ usage: (make-network-process &rest ARGS) */) #endif #endif #endif + if (xerrno == EINTR) + { + /* Unlike most other syscalls connect() cannot be called + again. (That would return EALREADY.) The proper way to + wait for completion is select(). */ + int sc; + SELECT_TYPE fdset; + retry_select: + FD_ZERO (&fdset); + FD_SET (s, &fdset); + QUIT; + sc = select (s + 1, (SELECT_TYPE *)0, &fdset, (SELECT_TYPE *)0, + (EMACS_TIME *)0); + if (sc == -1) + { + if (errno == EINTR) + goto retry_select; + else + report_file_error ("select failed", Qnil); + } + eassert (sc > 0); + { + int len = sizeof xerrno; + eassert (FD_ISSET (s, &fdset)); + if (getsockopt (s, SOL_SOCKET, SO_ERROR, &xerrno, &len) == -1) + report_file_error ("getsockopt failed", Qnil); + if (xerrno != 0) + errno = xerrno, report_file_error ("error during connect", Qnil); + else + break; + } + } immediate_quit = 0; @@ -3659,9 +3689,6 @@ usage: (make-network-process &rest ARGS) */) specpdl_ptr = specpdl + count1; emacs_close (s); s = -1; - - if (xerrno == EINTR) - goto retry_connect; } if (s >= 0) -- 2.39.2