Fix proxy launcher error in chromedriver posix when chrome is closed.

The proxy launcher couldn't determine chrome's exit code because chromedriver
was ignoring SIGCHLD.
BUG=none
TEST=none


Review URL: http://codereview.chromium.org/8929013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114365 0039d316-1c4b-4281-b951-d872f2087c98

third_party/mongoose/README.chromium

@@ -2,7 +2,8 @@ Name: Mongoose webserver
 Short Name: mongoose
 URL: http://code.google.com/p/mongoose/
 LICENSE: MIT
-Version: Revision 55cf8bf30cd9 (between 3.0 and 3.1)
+Version: 55cf8bf30cd9
+Release: between 3.0 and 3.1
 Security Critical: no
 
 Description:
@@ -20,4 +21,6 @@ the chrome versoin of webdriver found under the directory:
 Local modifications (all detailed in chrome-mongoose-modifications.diff,
 pending upstreaming by danielwh):
 * Fixed a couple of Windows/VS2010 compiler warnings/errors
-* Fixed linger code to apply to sockets from bind, rather than shutdown
+* Fixed linger code to apply to sockets from bind, rather than shutdown
+* Don't ignore SIGCHLD, since the proxy launcher depends on it for determining
+  chrome's exit code.

third_party/mongoose/chrome-mongoose-modifications.diff

@@ -1,6 +1,6 @@
-diff -r 55cf8bf30cd9 mongoose.c
---- a/mongoose.c	Fri Aug 26 21:30:20 2011 +0100
-+++ b/mongoose.c	Thu Nov 03 02:16:22 2011 +0000
+diff --git a/third_party/mongoose/mongoose.c b/third_party/mongoose/mongoose.c
+--- a/third_party/mongoose/mongoose.c
++++ b/third_party/mongoose/mongoose.c
 @@ -23,7 +23,9 @@
  #else
  #define _XOPEN_SOURCE 600 // For flockfile() on Linux
@@ -32,7 +32,7 @@ diff -r 55cf8bf30cd9 mongoose.c
  #define NO_CGI // WinCE has no pipes
 
  typedef long off_t;
-@@ -849,7 +854,9 @@
+@@ -849,7 +854,9 @@ static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
  }
 
  static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
@@ -43,7 +43,7 @@ diff -r 55cf8bf30cd9 mongoose.c
    ReleaseMutex(*mutex);
    WaitForMultipleObjects(2, handles, FALSE, INFINITE);
    return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
-@@ -3424,6 +3431,10 @@
+@@ -3424,6 +3431,10 @@ static int set_ports_option(struct mg_context *ctx) {
    struct vec vec;
    struct socket so, *listener;
 
@@ -54,7 +54,7 @@ diff -r 55cf8bf30cd9 mongoose.c
    while (success && (list = next_option(list, &vec, NULL)) != NULL) {
      if (!parse_port_string(&vec, &so)) {
        cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
-@@ -3448,6 +3459,8 @@
+@@ -3448,6 +3459,8 @@ static int set_ports_option(struct mg_context *ctx) {
                 // Thanks to Igor Klopov who suggested the patch.
                 setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *) &on,
                            sizeof(on)) != 0 ||
@@ -63,7 +63,7 @@ diff -r 55cf8bf30cd9 mongoose.c
                 bind(sock, &so.lsa.u.sa, so.lsa.len) != 0 ||
                 listen(sock, 100) != 0) {
        closesocket(sock);
-@@ -3768,15 +3781,8 @@
+@@ -3768,15 +3781,8 @@ static void reset_per_request_attributes(struct mg_connection *conn) {
 
  static void close_socket_gracefully(SOCKET sock) {
    char buf[BUFSIZ];
@@ -79,3 +79,12 @@ diff -r 55cf8bf30cd9 mongoose.c
    // Send FIN to the client
    (void) shutdown(sock, SHUT_WR);
    set_non_blocking_mode(sock);
+@@ -4233,8 +4239,6 @@ struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
+   // Ignore SIGPIPE signal, so if browser cancels the request, it
+   // won't kill the whole process.
+   (void) signal(SIGPIPE, SIG_IGN);
+-  // Also ignoring SIGCHLD to let the OS to reap zombies properly.
+-  (void) signal(SIGCHLD, SIG_IGN);
+ #endif // !_WIN32
+
+   (void) pthread_mutex_init(&ctx->mutex, NULL);

third_party/mongoose/mongoose.c

@@ -4239,8 +4239,6 @@ struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
   // Ignore SIGPIPE signal, so if browser cancels the request, it
   // won't kill the whole process.
   (void) signal(SIGPIPE, SIG_IGN);
-  // Also ignoring SIGCHLD to let the OS to reap zombies properly.
-  (void) signal(SIGCHLD, SIG_IGN);
 #endif // !_WIN32
 
   (void) pthread_mutex_init(&ctx->mutex, NULL);