1 files changed, 26 insertions, 0 deletions
diff --git a/ios-bootstrap/ib-log.h b/ios-bootstrap/ib-log.h
new file mode 100644
index 0000000..f4b0b35
--- /dev/null
+++ b/ios-bootstrap/ib-log.h
@@ -0,0 +1,26 @@
+#pragma once
+#include <dispatch/dispatch.h>
+#include <stdio.h>
+#include <unistd.h>
+
+static FILE *logfp;
+static void open_logfp_if_necessary() {
+    /* syslog() doesn't seem to work from launchd... */
+    static dispatch_once_t pred;
+    dispatch_once(&pred, ^{
+        char filename[128];
+        sprintf(filename, "/tmp/substitute-" IB_LOG_NAME "-log.%ld",
+                (long) getpid());
+        logfp = fopen(filename, "w");
+        if (!logfp) {
+            /* Ack... */
+            logfp = stderr;
+        }
+    });
+}
+#define ib_log(fmt, args...) do { \
+    open_logfp_if_necessary(); \
+    fprintf(logfp, fmt "\n", ##args); \
+    fflush(logfp); \
+} while(0)
+