Move terminal setting bits from tgetpass.c to term.c

term.c

@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2009 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.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.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>
+#else
+# ifdef HAVE_STRINGS_H
+#  include <strings.h>
+# endif
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_TERMIOS_H
+# include <termios.h>
+#else
+# ifdef HAVE_TERMIO_H
+#  include <termio.h>
+# else
+#  include <sgtty.h>
+#  include <sys/ioctl.h>
+# endif /* HAVE_TERMIO_H */
+#endif /* HAVE_TERMIOS_H */
+
+#include "sudo.h"
+
+#ifndef lint
+__unused static const char rcsid[] = "$Sudo$";
+#endif /* lint */
+
+#ifndef TCSASOFT
+# define TCSASOFT	0
+#endif
+#ifndef ECHONL
+# define ECHONL		0
+#endif
+#ifndef IEXTEN
+# define IEXTEN		0
+#endif
+
+#ifndef _POSIX_VDISABLE
+# ifdef VDISABLE
+#  define _POSIX_VDISABLE	VDISABLE
+# else
+#  define _POSIX_VDISABLE	0
+# endif
+#endif
+
+/*
+ * Compat macros for non-termios systems.
+ */
+#ifndef HAVE_TERMIOS_H
+# ifdef HAVE_TERMIO_H
+#  undef termios
+#  define termios		termio
+#  define tcgetattr(f, t)	ioctl(f, TCGETA, t)
+#  define tcsetattr(f, a, t)	ioctl(f, a, t)
+#  undef TCSAFLUSH
+#  define TCSAFLUSH		TCSETAF
+# else /* SGTTY */
+#  undef termios
+#  define termios		sgttyb
+#  define c_lflag		sg_flags
+#  define tcgetattr(f, t)	ioctl(f, TIOCGETP, t)
+#  define tcsetattr(f, a, t)	ioctl(f, a, t)
+#  undef TCSAFLUSH
+#  define TCSAFLUSH		TIOCSETP
+# endif /* HAVE_TERMIO_H */
+#endif /* HAVE_TERMIOS_H */
+
+typedef struct termios sudo_term_t;
+
+static sudo_term_t term, oterm;
+static int changed;
+int term_erase;
+int term_kill;
+
+int
+term_restore(fd)
+    int fd;
+{
+    if (changed) {
+	if (tcsetattr(fd, TCSAFLUSH|TCSASOFT, &term) != 0)
+	    return(0);
+	changed = 0;
+    }
+    return(1);
+}
+
+int
+term_noecho(fd)
+    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, TCSAFLUSH|TCSASOFT, &term) == 0) {
+	changed = 1;
+	return(1);
+    }
+    return(0);
+}
+
+#if defined(HAVE_TERMIOS_H) || defined(HAVE_TERMIO_H)
+int
+term_raw(fd)
+    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, TCSAFLUSH|TCSASOFT, &term) == 0) {
+	term_erase = term.c_cc[VERASE];
+	term_kill = term.c_cc[VKILL];
+	changed = 1;
+	return(1);
+    }
+    return(0);
+}
+
+#else /* SGTTY */
+
+int
+term_raw(fd)
+    int fd;
+{
+    if (!changed && ioctl(fd, TIOCGETP, &oterm) != 0)
+	return(0);
+    (void) memcpy(&term, &oterm, sizeof(term));
+    /* Set terminal to half-cooked mode */
+    CLR(term.c_lflag, ECHO);
+    SET(term.sg_flags, CBREAK);
+    if (ioctl(fd, TIOCSETP, &term) == 0) {
+	term_erase = term.sg_erase;
+	term_kill = term.sg_kill;
+	changed = 1;
+	return(1);
+    }
+    return(0);
+}
+
+#endif