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-rw-r--r--include/ttyutils.h212
1 files changed, 212 insertions, 0 deletions
diff --git a/include/ttyutils.h b/include/ttyutils.h
new file mode 100644
index 0000000..e28a2b0
--- /dev/null
+++ b/include/ttyutils.h
@@ -0,0 +1,212 @@
+/*
+ * 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
+
+#ifdef USE_TTY_GROUP
+# define TTY_MODE 0620
+#else
+# define TTY_MODE 0600
+#endif
+#define TTYGRPNAME "tty" /* name of group to own ttys */
+
+/* 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 */
+
+/* Fallback for termios->c_cc[] */
+#ifndef CREPRINT
+# define CREPRINT ('r' & 037)
+#endif
+#ifndef CDISCARD
+# define CDISCARD ('o' & 037)
+#endif
+
+/* Default termios->iflag */
+#ifndef TTYDEF_IFLAG
+# define TTYDEF_IFLAG (BRKINT | ICRNL | IMAXBEL | IXON | IXANY)
+#endif
+
+/* Default termios->oflag */
+#ifndef TTYDEF_OFLAG
+# define TTYDEF_OFLAG (OPOST | ONLCR /*| OXTABS*/)
+#endif
+
+/* Default termios->lflag */
+#ifndef TTYDEF_LFLAG
+# define TTYDEF_LFLAG (ECHO | ICANON | ISIG | IEXTEN | ECHOE|ECHOKE|ECHOCTL)
+#endif
+
+/* Default termios->cflag */
+#ifndef TTYDEF_CFLAG
+# define TTYDEF_CFLAG (CREAD | CS8 | HUPCL)
+#endif
+
+/* 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 = CR; \
+ (ptr)->parity = 0; \
+ (ptr)->capslock = 0; \
+ } while (0)
+
+extern int get_terminal_dimension(int *cols, int *lines);
+extern int get_terminal_width(int default_width);
+extern int get_terminal_type(const char **type);
+extern int get_terminal_stdfd(void);
+extern int get_terminal_name(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
+#ifndef TAB0
+# define TAB0 0
+#endif
+#ifndef TABDLY
+# define TABDLY 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 */