* src/interact.h: New file.

* src/interact.c: New file.

Rev: src/interact.c:1.1
Rev: src/interact.h:1.1

src/interact.c

+/* interact.c
+ *
+ * Interact with the user.
+ *
+ * $Id$ */
+
+/* lsh, an implementation of the ssh protocol
+ *
+ * Copyright (C) 1999 Niels Mller
+ *
+ * This program 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.
+ *
+ * This program 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 "interact.h"
+
+#include "io.h"
+#include "werror.h"
+#include "xalloc.h"
+
+#include <string.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+
+
+int tty_fd = -1;
+
+int lsh_open_tty(void)
+{
+#if HAVE_STDTTY_FILENO
+
+  tty_fd = STDTTY_FILENO;
+  return 1;
+
+#else /* !HAVE_STDTTY_FILENO */
+
+  int fd = open("/dev/tty", O_RDWR);
+  if (fd < 0)
+    return 0;
+  tty_fd = fd;
+  return 1;
+  
+#endif /* !HAVE_STDTTY_FILENO */
+}
+
+/* Depends on the tty being line buffered */
+int tty_read_line(UINT32 size, UINT8 *buffer)
+{
+  UINT32 i = 0;
+
+  while (i < size)
+    {
+      int res = read(tty_fd, buffer + i, size - i);
+      if (!res)
+	/* User pressed EOF (^D) */
+	return i;
+      else if (res < 0)
+	switch(errno)
+	  {
+	  case EAGAIN:
+	  case EINTR:
+	    break;
+	  default:
+	    /* I/O error */
+	    werror("tty_read_line: %z (errno = %i)\n",
+		   errno, STRERROR(errno));
+	    return 0;
+	  }
+      else
+	{
+	  UINT32 j;
+	  for (j = 0; j < (unsigned) res; j++, i++)
+	    if (buffer[i] == '\n')
+	      return i;
+	}
+    }
+  /* We have filled our buffer already; continue reading until end of line */
+#define BUFSIZE 512
+  for (;;)
+    {
+      UINT8 b[BUFSIZE];
+      int res = read(tty_fd, b, BUFSIZE);
+      if (!res)
+	/* EOF */
+	return size;
+      else if (res < 0)
+	switch(errno)
+	  {
+	  case EAGAIN:
+	  case EINTR:
+	    break;
+	  default:
+	    /* I/O error */
+	    werror("tty_read_line: %z (errno = %i)\n",
+		   errno, strerror(errno));
+	    return 0;
+	  }
+      else
+	{
+	  UINT32 j;
+	  for (j = 0; j < (unsigned) res; j++)
+	    if (b[j] == '\n')
+	      return res;
+	}
+    }
+#undef BUFSIZE
+}
+
+#define TTY_BUFSIZE 10
+
+int yes_or_no(struct lsh_string *s, int def, int free)
+{
+  UINT8 buffer[TTY_BUFSIZE];
+  const struct exception *e;
+  
+  if ( (tty_fd < 0) || quiet_flag)
+    {
+      if (free)
+	lsh_string_free(s);
+      return def;
+    }
+
+  e = write_raw(tty_fd, s->length, s->data);
+
+  if (free)
+    lsh_string_free(s);
+
+  if (e)
+    return def;
+
+  if (!tty_read_line(TTY_BUFSIZE, buffer))
+    return def;
+
+  switch (buffer[0])
+    {
+    case 'y':
+    case 'Y':
+      return 1;
+    default:
+      return 0;
+    }
+}
+  

src/interact.h

+/* interact.h
+ *
+ * Interact with the user.
+ *
+ * $Id$*/
+
+/* lsh, an implementation of the ssh protocol
+ *
+ * Copyright (C) 1999 Niels Möller
+ *
+ * This program 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.
+ *
+ * This program 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
+ */
+
+#ifndef LSH_INTERACT_H_INCLUDED
+#define LSH_INTERACT_H_INCLUDED
+
+#include "lsh.h"
+
+extern int tty_fd;
+
+int lsh_open_tty(void);
+int tty_read_line(UINT32 size, UINT8 *buffer);
+int yes_or_no(struct lsh_string *s, int def, int free);
+
+#endif /* LSH_INTERACT_H_INCLUDED */