1 files changed, 105 insertions, 0 deletions
diff --git a/lib/et/com_err.c b/lib/et/com_err.c
new file mode 100644
index 0000000..7294c6d
--- /dev/null
+++ b/lib/et/com_err.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright 1987, 1988 by MIT Student Information Processing Board.
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose is hereby granted, provided that
+ * the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  M.I.T. and the
+ * M.I.T. S.I.P.B. make no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without
+ * express or implied warranty.
+ */
+
+#include "config.h"
+#include <stdio.h>
+#ifdef HAVE_TERMIOS_H
+#include <termios.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include "com_err.h"
+#include "error_table.h"
+#include "internal.h"
+
+static void
+default_com_err_proc (const char *whoami, errcode_t code, const
+		      char *fmt, va_list args)
+	COM_ERR_ATTR((format(printf, 3, 0)));
+
+static void
+default_com_err_proc (const char *whoami, errcode_t code, const
+		      char *fmt, va_list args)
+{
+    int do_cr = 1, fd = fileno(stderr);
+
+    if (whoami) {
+	fputs(whoami, stderr);
+	fputs(": ", stderr);
+    }
+    if (code) {
+	fputs(error_message(code), stderr);
+	fputs(" ", stderr);
+    }
+    if (fmt) {
+        vfprintf (stderr, fmt, args);
+    }
+    if (!isatty(fd))
+	do_cr = 0;
+#ifdef HAVE_TERMIOS_H
+    else {
+	struct termios t;
+
+	if ((tcgetattr(fd, &t)) == 0 &&
+	    (t.c_oflag & OPOST) && (t.c_oflag & ONLCR))
+	do_cr = 0;
+    }
+#endif
+    if (do_cr)
+	fputc('\r', stderr);
+    fputc('\n', stderr);
+    fflush(stderr);
+}
+
+typedef void (*errf) (const char *, errcode_t, const char *, va_list)
+        COM_ERR_ATTR((format(printf, 3, 0)));
+
+errf com_err_hook = default_com_err_proc;
+
+void com_err_va (const char *whoami, errcode_t code, const char *fmt,
+		 va_list args)
+{
+    (*com_err_hook) (whoami, code, fmt, args);
+}
+
+void com_err (const char *whoami,
+	      errcode_t code,
+	      const char *fmt, ...)
+{
+    va_list pvar;
+
+    if (!com_err_hook)
+	com_err_hook = default_com_err_proc;
+    va_start(pvar, fmt);
+    com_err_va (whoami, code, fmt, pvar);
+    va_end(pvar);
+}
+
+errf set_com_err_hook(errf new_proc)
+{
+    errf x = com_err_hook;
+
+    if (new_proc)
+	com_err_hook = new_proc;
+    else
+	com_err_hook = default_com_err_proc;
+
+    return x;
+}
+
+errf reset_com_err_hook(void) {
+    errf x = com_err_hook;
+    com_err_hook = default_com_err_proc;
+    return x;
+}