1 files changed, 114 insertions, 0 deletions
diff --git a/util/ttyio.c b/util/ttyio.c
new file mode 100644
index 000000000..39ad5a666
--- /dev/null
+++ b/util/ttyio.c
@@ -0,0 +1,114 @@
+/* ttyio.c -  tty i/O functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *
+ * This file is part of G10.
+ *
+ * G10 is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * G10 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <ctype.h>
+#include "util.h"
+#include "memory.h"
+#include "ttyio.h"
+
+static int last_prompt_len;
+
+static FILE *
+open_tty(void)
+{
+    FILE *tty = fopen("/dev/tty", "r");
+    if( !tty )
+	log_fatal("cannot open /dev/tty: %s\n", strerror(errno) );
+    return tty;
+}
+
+static void
+close_tty( FILE *tty )
+{
+    fclose(tty);
+}
+
+
+
+void
+tty_printf( const char *fmt, ... )
+{
+    va_list arg_ptr;
+
+    va_start( arg_ptr, fmt ) ;
+    last_prompt_len += vfprintf(stderr,fmt,arg_ptr) ;
+    va_end(arg_ptr);
+    fflush(stderr);
+}
+
+
+char *
+tty_get( const char *prompt )
+{
+    char *buf;
+    int c, n, i;
+    FILE *fp;
+
+    last_prompt_len = 0;
+    tty_printf( prompt );
+    buf = m_alloc(n=50);
+    i = 0;
+    fp = open_tty();
+    while( (c=getc(fp)) != EOF && c != '\n' ) {
+	last_prompt_len++;
+	if( c == '\t' )
+	    c = ' ';
+	else if( iscntrl(c) )
+	    continue;
+	if( !(i < n-1) ) {
+	    n += 50;
+	    buf = m_realloc( buf, n );
+	}
+	buf[i++] = c;
+    }
+    close_tty(fp);
+    buf[i] = 0;
+    return buf;
+}
+
+char *
+tty_get_hidden( const char *prompt )
+{
+    return tty_get( prompt ); /* fixme */
+}
+
+
+void
+tty_kill_prompt()
+{
+    int i;
+#if 0
+    for(i=0; i < last_prompt_len; i ++ )
+	fputc('\b', stderr);
+    for(i=0; i < last_prompt_len; i ++ )
+	fputc(' ', stderr);
+    for(i=0; i < last_prompt_len; i ++ )
+	fputc('\b', stderr);
+#endif
+    last_prompt_len = 0;
+    fflush(stderr);
+}
+