From e64f91feb7075fe30a179fba71f75409f962b685 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Mon, 25 Nov 2013 15:35:37 +0100 Subject: [PATCH] sigpipe: factor out sigpipe_reset from easy.c Commit 7d80ed64e43515 introduced some helpers to handle sigpipe in easy.c. However, that fix was incomplete, and we need to add more callers in other files. The first step is making the helpers globally accessible. Since the functions are small and should generally end up inlined anyway, we simply define them in the header as static functions. Signed-off-by: Jeff King --- lib/Makefile.inc | 2 +- lib/easy.c | 56 +--------------------------------- lib/sigpipe.h | 78 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 80 insertions(+), 56 deletions(-) create mode 100644 lib/sigpipe.h diff --git a/lib/Makefile.inc b/lib/Makefile.inc index ec71770f33..62bc0b3d56 100644 --- a/lib/Makefile.inc +++ b/lib/Makefile.inc @@ -46,4 +46,4 @@ HHEADERS = arpa_telnet.h netrc.h file.h timeval.h qssl.h hostip.h \ curl_ntlm_msgs.h curl_sasl.h curl_schannel.h curl_multibyte.h \ curl_darwinssl.h hostcheck.h bundles.h conncache.h curl_setup_once.h \ multihandle.h setup-vms.h pipeline.h dotdot.h x509asn1.h gskit.h \ - http2.h + http2.h sigpipe.h diff --git a/lib/easy.c b/lib/easy.c index 1e718abcba..1dbdcb7688 100644 --- a/lib/easy.c +++ b/lib/easy.c @@ -50,11 +50,6 @@ #include #endif -#if defined(HAVE_SIGNAL_H) && defined(HAVE_SIGACTION) && defined(USE_OPENSSL) -#define SIGPIPE_IGNORE 1 -#include -#endif - #include "strequal.h" #include "urldata.h" #include @@ -78,6 +73,7 @@ #include "warnless.h" #include "conncache.h" #include "multiif.h" +#include "sigpipe.h" #define _MPRINTF_REPLACE /* use our functions only */ #include @@ -85,56 +81,6 @@ /* The last #include file should be: */ #include "memdebug.h" -#ifdef SIGPIPE_IGNORE -struct sigpipe_ignore { - struct sigaction old_pipe_act; - bool no_signal; -}; - -#define SIGPIPE_VARIABLE(x) struct sigpipe_ignore x - -/* - * sigpipe_ignore() makes sure we ignore SIGPIPE while running libcurl - * internals, and then sigpipe_restore() will restore the situation when we - * return from libcurl again. - */ -static void sigpipe_ignore(struct SessionHandle *data, - struct sigpipe_ignore *ig) -{ - /* get a local copy of no_signal because the SessionHandle might not be - around when we restore */ - ig->no_signal = data->set.no_signal; - if(!data->set.no_signal) { - struct sigaction action; - /* first, extract the existing situation */ - memset(&ig->old_pipe_act, 0, sizeof(struct sigaction)); - sigaction(SIGPIPE, NULL, &ig->old_pipe_act); - action = ig->old_pipe_act; - /* ignore this signal */ - action.sa_handler = SIG_IGN; - sigaction(SIGPIPE, &action, NULL); - } -} - -/* - * sigpipe_restore() puts back the outside world's opinion of signal handler - * and SIGPIPE handling. It MUST only be called after a corresponding - * sigpipe_ignore() was used. - */ -static void sigpipe_restore(struct sigpipe_ignore *ig) -{ - if(!ig->no_signal) - /* restore the outside state */ - sigaction(SIGPIPE, &ig->old_pipe_act, NULL); -} - -#else -/* for systems without sigaction */ -#define sigpipe_ignore(x,y) Curl_nop_stmt -#define sigpipe_restore(x) Curl_nop_stmt -#define SIGPIPE_VARIABLE(x) -#endif - /* win32_cleanup() is for win32 socket cleanup functionality, the opposite of win32_init() */ static void win32_cleanup(void) diff --git a/lib/sigpipe.h b/lib/sigpipe.h new file mode 100644 index 0000000000..e8d2acd6ee --- /dev/null +++ b/lib/sigpipe.h @@ -0,0 +1,78 @@ +#ifndef HEADER_CURL_SIGPIPE_H +#define HEADER_CURL_SIGPIPE_H +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2013, Daniel Stenberg, , et al. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at http://curl.haxx.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ***************************************************************************/ +#include "curl_setup.h" + +#if defined(HAVE_SIGNAL_H) && defined(HAVE_SIGACTION) && defined(USE_OPENSSL) +#include + +struct sigpipe_ignore { + struct sigaction old_pipe_act; + bool no_signal; +}; + +#define SIGPIPE_VARIABLE(x) struct sigpipe_ignore x + +/* + * sigpipe_ignore() makes sure we ignore SIGPIPE while running libcurl + * internals, and then sigpipe_restore() will restore the situation when we + * return from libcurl again. + */ +static void sigpipe_ignore(struct SessionHandle *data, + struct sigpipe_ignore *ig) +{ + /* get a local copy of no_signal because the SessionHandle might not be + around when we restore */ + ig->no_signal = data->set.no_signal; + if(!data->set.no_signal) { + struct sigaction action; + /* first, extract the existing situation */ + memset(&ig->old_pipe_act, 0, sizeof(struct sigaction)); + sigaction(SIGPIPE, NULL, &ig->old_pipe_act); + action = ig->old_pipe_act; + /* ignore this signal */ + action.sa_handler = SIG_IGN; + sigaction(SIGPIPE, &action, NULL); + } +} + +/* + * sigpipe_restore() puts back the outside world's opinion of signal handler + * and SIGPIPE handling. It MUST only be called after a corresponding + * sigpipe_ignore() was used. + */ +static void sigpipe_restore(struct sigpipe_ignore *ig) +{ + if(!ig->no_signal) + /* restore the outside state */ + sigaction(SIGPIPE, &ig->old_pipe_act, NULL); +} + +#else +/* for systems without sigaction */ +#define sigpipe_ignore(x,y) Curl_nop_stmt +#define sigpipe_restore(x) Curl_nop_stmt +#define SIGPIPE_VARIABLE(x) +#endif + +#endif /* HEADER_CURL_SIGPIPE_H */