1 files changed, 168 insertions, 0 deletions

diff --git a/libblkid/include/ttyutils.h b/libblkid/include/ttyutils.h
new file mode 100644
index 000000000..e842f9f0d
--- /dev/null
+++ b/libblkid/include/ttyutils.h
@@ -0,0 +1,168 @@
+/*
+ * No copyright is claimed.  This code is in the public domain; do with
+ * it what you wish.
+ *
+ * Written by Karel Zak <kzak@redhat.com>
+ */
+#ifndef UTIL_LINUX_TTYUTILS_H
+#define UTIL_LINUX_TTYUTILS_H
+
+#include <stdlib.h>
+#include <termios.h>
+#include <limits.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_SYS_TTYDEFAULTS_H
+#include <sys/ttydefaults.h>
+#endif
+
+/* Some shorthands for control characters. */
+#define CTL(x)		((x) ^ 0100)	/* Assumes ASCII dialect */
+#define CR		CTL('M')	/* carriage return */
+#define NL		CTL('J')	/* line feed */
+#define BS		CTL('H')	/* back space */
+#define DEL		CTL('?')	/* delete */
+
+/* Defaults for line-editing etc. characters; you may want to change these. */
+#define DEF_ERASE	DEL		/* default erase character */
+#define DEF_INTR	CTL('C')	/* default interrupt character */
+#define DEF_QUIT	CTL('\\')	/* default quit char */
+#define DEF_KILL	CTL('U')	/* default kill char */
+#define DEF_EOF		CTL('D')	/* default EOF char */
+#define DEF_EOL		0
+#define DEF_SWITCH	0		/* default switch char */
+
+/* Storage for things detected while the login name was read. */
+struct chardata {
+	int erase;		/* erase character */
+	int kill;		/* kill character */
+	int eol;		/* end-of-line character */
+	int parity;		/* what parity did we see */
+	int capslock;		/* upper case without lower case */
+};
+
+#define INIT_CHARDATA(ptr) do {              \
+		(ptr)->erase    = DEF_ERASE; \
+		(ptr)->kill     = DEF_KILL;  \
+		(ptr)->eol      = CTRL('r'); \
+	        (ptr)->parity   = 0;         \
+	        (ptr)->capslock = 0;         \
+	} while (0)
+
+extern int get_terminal_width(void);
+extern int get_terminal_name(int fd, const char **path, const char **name,
+			     const char **number);
+
+#define UL_TTY_KEEPCFLAGS	(1 << 1)
+#define UL_TTY_UTF8		(1 << 2)
+
+static inline void reset_virtual_console(struct termios *tp, int flags)
+{
+	/* Use defaults of <sys/ttydefaults.h> for base settings */
+	tp->c_iflag |= TTYDEF_IFLAG;
+	tp->c_oflag |= TTYDEF_OFLAG;
+	tp->c_lflag |= TTYDEF_LFLAG;
+
+	if ((flags & UL_TTY_KEEPCFLAGS) == 0) {
+#ifdef CBAUD
+		tp->c_lflag &= ~CBAUD;
+#endif
+		tp->c_cflag |= (B38400 | TTYDEF_CFLAG);
+	}
+
+	/* Sane setting, allow eight bit characters, no carriage return delay
+	 * the same result as `stty sane cr0 pass8'
+	 */
+#ifndef IUCLC
+# define IUCLC 0
+#endif
+#ifndef NL0
+# define NL0 0
+#endif
+#ifndef CR0
+# define CR0 0
+#endif
+#ifndef BS0
+# define BS0 0
+#endif
+#ifndef VT0
+# define VT0 0
+#endif
+#ifndef FF0
+# define FF0 0
+#endif
+#ifndef OLCUC
+# define OLCUC 0
+#endif
+#ifndef OFILL
+# define OFILL 0
+#endif
+#ifndef NLDLY
+# define NLDLY 0
+#endif
+#ifndef CRDLY
+# define CRDLY 0
+#endif
+#ifndef BSDLY
+# define BSDLY 0
+#endif
+#ifndef VTDLY
+# define VTDLY 0
+#endif
+#ifndef FFDLY
+# define FFDLY 0
+#endif
+
+	tp->c_iflag |=  (BRKINT | ICRNL | IMAXBEL);
+	tp->c_iflag &= ~(IGNBRK | INLCR | IGNCR | IXOFF | IUCLC | IXANY | ISTRIP);
+	tp->c_oflag |=  (OPOST | ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0);
+	tp->c_oflag &= ~(OLCUC | OCRNL | ONOCR | ONLRET | OFILL | \
+			    NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
+	tp->c_lflag |=  (ISIG | ICANON | IEXTEN | ECHO|ECHOE|ECHOK|ECHOKE|ECHOCTL);
+	tp->c_lflag &= ~(ECHONL|ECHOPRT | NOFLSH | TOSTOP);
+
+	if ((flags & UL_TTY_KEEPCFLAGS) == 0) {
+		tp->c_cflag |=  (CREAD | CS8 | HUPCL);
+		tp->c_cflag &= ~(PARODD | PARENB);
+	}
+#ifdef OFDEL
+	tp->c_oflag &= ~OFDEL;
+#endif
+#ifdef XCASE
+	tp->c_lflag &= ~XCASE;
+#endif
+#ifdef IUTF8
+	if (flags & UL_TTY_UTF8)
+		tp->c_iflag |= IUTF8;	    /* Set UTF-8 input flag */
+	else
+		tp->c_iflag &= ~IUTF8;
+#endif
+	/* VTIME and VMIN can overlap with VEOF and VEOL since they are
+	 * only used for non-canonical mode. We just set the at the
+	 * beginning, so nothing bad should happen.
+	 */
+	tp->c_cc[VTIME]    = 0;
+	tp->c_cc[VMIN]     = 1;
+	tp->c_cc[VINTR]    = CINTR;
+	tp->c_cc[VQUIT]    = CQUIT;
+	tp->c_cc[VERASE]   = CERASE; /* ASCII DEL (0177) */
+	tp->c_cc[VKILL]    = CKILL;
+	tp->c_cc[VEOF]     = CEOF;
+#ifdef VSWTC
+	tp->c_cc[VSWTC]    = _POSIX_VDISABLE;
+#elif defined(VSWTCH)
+	tp->c_cc[VSWTCH]   = _POSIX_VDISABLE;
+#endif
+	tp->c_cc[VSTART]   = CSTART;
+	tp->c_cc[VSTOP]    = CSTOP;
+	tp->c_cc[VSUSP]    = CSUSP;
+	tp->c_cc[VEOL]     = _POSIX_VDISABLE;
+	tp->c_cc[VREPRINT] = CREPRINT;
+	tp->c_cc[VDISCARD] = CDISCARD;
+	tp->c_cc[VWERASE]  = CWERASE;
+	tp->c_cc[VLNEXT]   = CLNEXT;
+	tp->c_cc[VEOL2]    = _POSIX_VDISABLE;
+}
+
+#endif /* UTIL_LINUX_TTYUTILS_H */