httpd: fix proxy mode bug (annoying but harmless), better help text

function                                             old     new   delta
cgi_io_loop_and_exit                                 594     635     +41
packed_usage                                       26815   26841     +26
handle_incoming_and_exit                            2745    2739      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/networking/httpd.c b/networking/httpd.c
index 8834c1c71..6dbc219e7 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -1145,13 +1145,14 @@ static NOINLINE void cgi_io_loop_and_exit(int fromCgi_rd, int toCgi_wr, int post
                                 /* post_len <= 0 && hdr_cnt <= 0:
                                  * no more POST data to CGI,
                                  * let CGI see EOF on CGI's stdin */
-                                close(toCgi_wr);
+                                if (toCgi_wr != fromCgi_rd)
+                                        close(toCgi_wr);
                                 toCgi_wr = 0;
                         }
                 }
 
                 /* Now wait on the set of sockets */
-                count = safe_poll(pfd, 3, -1);
+                count = safe_poll(pfd, toCgi_wr ? TO_CGI+1 : FROM_CGI+1, -1);
                 if (count <= 0) {
 #if 0
                         if (safe_waitpid(pid, &status, WNOHANG) <= 0) {
@@ -2103,8 +2104,7 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
                 header_ptr += 2;
                 write(proxy_fd, header_buf, header_ptr - header_buf);
                 free(header_buf); /* on the order of 8k, free it */
-                /* cgi_io_loop_and_exit needs to have two distinct fds */
-                cgi_io_loop_and_exit(proxy_fd, dup(proxy_fd), length);
+                cgi_io_loop_and_exit(proxy_fd, proxy_fd, length);
         }
 #endif