cgi-fcgi-interp: Fix logger buffer-handling bugs.

2 files changed, 13 insertions, 3 deletions

diff --git a/cprogs/cgi-fcgi-interp.c b/cprogs/cgi-fcgi-interp.c
index 2c157d2..7a5a5db 100644
--- a/cprogs/cgi-fcgi-interp.c
+++ b/cprogs/cgi-fcgi-interp.c
@@ -789,12 +789,19 @@ static void errpipe_readable(void) {
   static char buf[1024];
   static int pending;
 
+  /* %: does not contain newlines
+   * _: empty (garbage)
+   */ 
+
+  /*           %%%%%%%%%%%__________________ */
+  /*                      ^ pending          */
+
   for (;;) {
     int avail = sizeof(buf) - pending;
     ssize_t got = read(errpipe, buf+pending, avail);
     if (got==-1) {
       if (errno==EINTR) continue;
-      else if (errno==EWOULDBLOCK || errno==EAGAIN) /*ok*/;
+      else if (errno==EWOULDBLOCK || errno==EAGAIN) return;
       else diee("(stage2) errpipe read");
       got = 0;
     } else if (got==0) {
@@ -819,6 +826,7 @@ static void errpipe_readable(void) {
       }
       syslog(LOG_ERR,"stderr: %.*s", printupto-eaten, buf+eaten);
       eaten += eat;
+      scanned = eaten;
     }
     pending -= eaten;
     memmove(buf, buf+eaten, pending);
diff --git a/cprogs/cgi-fcgi-test b/cprogs/cgi-fcgi-test
index 4c8d7b7..3d5f0ed 100755
--- a/cprogs/cgi-fcgi-test
+++ b/cprogs/cgi-fcgi-test
@@ -23,13 +23,15 @@ print STDERR "[$$ stderr starting]\n";
 print REALSTDERR "[$$ real-stderr starting]\n";
 
 while ($request->Accept >= 0) {
+    my $ua = $ENV{HTTP_USER_AGENT} // '<none>';
     print <<END;
 Content-Type; text/plain
 
 success
 count=$count
+$ua
 END
-    print STDERR "[$$ stderr] serviced $count.\n";
-    print REALSTDERR "[$$ real-stderr] serviced $count.\n";
+    print STDERR "[$$ stderr] serviced $count ($ua).\n";
+    print REALSTDERR "[$$ real-stderr] serviced $count ($ua).\n";
     $count++;
 }