Imported Upstream version 1.8.1p2

[debian/sudo] / common / term.c

diff --git a/common/term.c b/common/term.c
new file mode 100644 (file)
index 0000000..b8f03db
--- /dev/null
+++ b/common/term.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2011 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
+#  include <memory.h>
+# endif
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <termios.h>
+
+#include "missing.h"
+
+#ifndef TCSASOFT
+# define TCSASOFT      0
+#endif
+#ifndef ECHONL
+# define ECHONL                0
+#endif
+#ifndef IEXTEN
+# define IEXTEN                0
+#endif
+#ifndef IUCLC
+# define IUCLC         0
+#endif
+
+#ifndef _POSIX_VDISABLE
+# ifdef VDISABLE
+#  define _POSIX_VDISABLE      VDISABLE
+# else
+#  define _POSIX_VDISABLE      0
+# endif
+#endif
+
+static struct termios term, oterm;
+static int changed;
+int term_erase;
+int term_kill;
+
+int
+term_restore(int fd, int flush)
+{
+    if (changed) {
+       int flags = TCSASOFT;
+       flags |= flush ? TCSAFLUSH : TCSADRAIN;
+       if (tcsetattr(fd, flags, &oterm) != 0)
+           return 0;
+       changed = 0;
+    }
+    return 1;
+}
+
+int
+term_noecho(int fd)
+{
+    if (!changed && tcgetattr(fd, &oterm) != 0)
+       return 0;
+    (void) memcpy(&term, &oterm, sizeof(term));
+    CLR(term.c_lflag, ECHO|ECHONL);
+#ifdef VSTATUS
+    term.c_cc[VSTATUS] = _POSIX_VDISABLE;
+#endif
+    if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
+       changed = 1;
+       return 1;
+    }
+    return 0;
+}
+
+int
+term_raw(int fd, int isig)
+{
+    struct termios term;
+
+    if (!changed && tcgetattr(fd, &oterm) != 0)
+       return 0;
+    (void) memcpy(&term, &oterm, sizeof(term));
+    /* Set terminal to raw mode */
+    term.c_cc[VMIN] = 1;
+    term.c_cc[VTIME] = 0;
+    CLR(term.c_iflag, ICRNL | IGNCR | INLCR | IUCLC | IXON);
+    CLR(term.c_oflag, OPOST);
+    CLR(term.c_lflag, ECHO | ICANON | ISIG | IEXTEN);
+    if (isig)
+       SET(term.c_lflag, ISIG);
+    if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
+       changed = 1;
+       return 1;
+    }
+    return 0;
+}
+
+int
+term_cbreak(int fd)
+{
+    if (!changed && tcgetattr(fd, &oterm) != 0)
+       return 0;
+    (void) memcpy(&term, &oterm, sizeof(term));
+    /* Set terminal to half-cooked mode */
+    term.c_cc[VMIN] = 1;
+    term.c_cc[VTIME] = 0;
+    CLR(term.c_lflag, ECHO | ECHONL | ICANON | IEXTEN);
+    SET(term.c_lflag, ISIG);
+#ifdef VSTATUS
+    term.c_cc[VSTATUS] = _POSIX_VDISABLE;
+#endif
+    if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
+       term_erase = term.c_cc[VERASE];
+       term_kill = term.c_cc[VKILL];
+       changed = 1;
+       return 1;
+    }
+    return 0;
+}
+
+int
+term_copy(int src, int dst)
+{
+    struct termios tt;
+
+    if (tcgetattr(src, &tt) != 0)
+       return 0;
+    if (tcsetattr(dst, TCSANOW|TCSASOFT, &tt) != 0)
+       return 0;
+    return 1;
+}