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 <peff@peff.net>

1 files changed, 1 insertions, 55 deletions

diff --git a/lib/easy.c b/lib/easy.c
index 1e718abcb..1dbdcb768 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -50,11 +50,6 @@
 #include <sys/param.h>
 #endif
 
-#if defined(HAVE_SIGNAL_H) && defined(HAVE_SIGACTION) && defined(USE_OPENSSL)
-#define SIGPIPE_IGNORE 1
-#include <signal.h>
-#endif
-
 #include "strequal.h"
 #include "urldata.h"
 #include <curl/curl.h>
@@ -78,6 +73,7 @@
 #include "warnless.h"
 #include "conncache.h"
 #include "multiif.h"
+#include "sigpipe.h"
 
 #define _MPRINTF_REPLACE /* use our functions only */
 #include <curl/mprintf.h>
@@ -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)