Imported from util-linux-2.2 tarball.

1 files changed, 508 insertions, 0 deletions

diff --git a/text-utils/ul.c b/text-utils/ul.c
new file mode 100644
index 000000000..75e6f95cb
--- /dev/null
+++ b/text-utils/ul.c
@@ -0,0 +1,508 @@
+/*
+ * Copyright (c) 1980, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)ul.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <stdio.h>
+
+#define	IESC	'\033'
+#define	SO	'\016'
+#define	SI	'\017'
+#define	HFWD	'9'
+#define	HREV	'8'
+#define	FREV	'7'
+#define	MAXBUF	512
+
+#define	NORMAL	000
+#define	ALTSET	001	/* Reverse */
+#define	SUPERSC	002	/* Dim */
+#define	SUBSC	004	/* Dim | Ul */
+#define	UNDERL	010	/* Ul */
+#define	BOLD	020	/* Bold */
+
+int	must_use_uc, must_overstrike;
+char	*CURS_UP, *CURS_RIGHT, *CURS_LEFT,
+	*ENTER_STANDOUT, *EXIT_STANDOUT, *ENTER_UNDERLINE, *EXIT_UNDERLINE,
+	*ENTER_DIM, *ENTER_BOLD, *ENTER_REVERSE, *UNDER_CHAR, *EXIT_ATTRIBUTES;
+
+struct	CHAR	{
+	char	c_mode;
+	char	c_char;
+} ;
+
+struct	CHAR	obuf[MAXBUF];
+int	col, maxcol;
+int	mode;
+int	halfpos;
+int	upln;
+int	iflag;
+
+int	outchar();
+#define	PRINT(s)	if (s == NULL) /* void */; else tputs(s, 1, outchar)
+
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	extern int optind;
+	extern char *optarg;
+	int c;
+	char *termtype;
+	FILE *f;
+	char termcap[1024];
+	char *getenv(), *strcpy();
+
+	termtype = getenv("TERM");
+	if (termtype == NULL || (argv[0][0] == 'c' && !isatty(1)))
+		termtype = "lpr";
+	while ((c=getopt(argc, argv, "it:T:")) != EOF)
+		switch(c) {
+
+		case 't':
+		case 'T': /* for nroff compatibility */
+				termtype = optarg;
+			break;
+		case 'i':
+			iflag = 1;
+			break;
+
+		default:
+			fprintf(stderr,
+				"usage: %s [ -i ] [ -tTerm ] file...\n",
+				argv[0]);
+			exit(1);
+		}
+
+	switch(tgetent(termcap, termtype)) {
+
+	case 1:
+		break;
+
+	default:
+		fprintf(stderr,"trouble reading termcap");
+		/* fall through to ... */
+
+	case 0:
+		/* No such terminal type - assume dumb */
+		(void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:");
+		break;
+	}
+	initcap();
+	if (    (tgetflag("os") && ENTER_BOLD==NULL ) ||
+		(tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL))
+			must_overstrike = 1;
+	initbuf();
+	if (optind == argc)
+		filter(stdin);
+	else for (; optind<argc; optind++) {
+		f = fopen(argv[optind],"r");
+		if (f == NULL) {
+			perror(argv[optind]);
+			exit(1);
+		} else
+			filter(f);
+	}
+	exit(0);
+}
+
+filter(f)
+	FILE *f;
+{
+	register c;
+
+	while ((c = getc(f)) != EOF) switch(c) {
+
+	case '\b':
+		if (col > 0)
+			col--;
+		continue;
+
+	case '\t':
+		col = (col+8) & ~07;
+		if (col > maxcol)
+			maxcol = col;
+		continue;
+
+	case '\r':
+		col = 0;
+		continue;
+
+	case SO:
+		mode |= ALTSET;
+		continue;
+
+	case SI:
+		mode &= ~ALTSET;
+		continue;
+
+	case IESC:
+		switch (c = getc(f)) {
+
+		case HREV:
+			if (halfpos == 0) {
+				mode |= SUPERSC;
+				halfpos--;
+			} else if (halfpos > 0) {
+				mode &= ~SUBSC;
+				halfpos--;
+			} else {
+				halfpos = 0;
+				reverse();
+			}
+			continue;
+
+		case HFWD:
+			if (halfpos == 0) {
+				mode |= SUBSC;
+				halfpos++;
+			} else if (halfpos < 0) {
+				mode &= ~SUPERSC;
+				halfpos++;
+			} else {
+				halfpos = 0;
+				fwd();
+			}
+			continue;
+
+		case FREV:
+			reverse();
+			continue;
+
+		default:
+			fprintf(stderr,
+				"Unknown escape sequence in input: %o, %o\n",
+				IESC, c);
+			exit(1);
+		}
+		continue;
+
+	case '_':
+		if (obuf[col].c_char)
+			obuf[col].c_mode |= UNDERL | mode;
+		else
+			obuf[col].c_char = '_';
+	case ' ':
+		col++;
+		if (col > maxcol)
+			maxcol = col;
+		continue;
+
+	case '\n':
+		flushln();
+		continue;
+
+	case '\f':
+		flushln();
+		putchar('\f');
+		continue;
+
+	default:
+		if (c < ' ')	/* non printing */
+			continue;
+		if (obuf[col].c_char == '\0') {
+			obuf[col].c_char = c;
+			obuf[col].c_mode = mode;
+		} else if (obuf[col].c_char == '_') {
+			obuf[col].c_char = c;
+			obuf[col].c_mode |= UNDERL|mode;
+		} else if (obuf[col].c_char == c)
+			obuf[col].c_mode |= BOLD|mode;
+		else
+			obuf[col].c_mode = mode;
+		col++;
+		if (col > maxcol)
+			maxcol = col;
+		continue;
+	}
+	if (maxcol)
+		flushln();
+}
+
+flushln()
+{
+	register lastmode;
+	register i;
+	int hadmodes = 0;
+
+	lastmode = NORMAL;
+	for (i=0; i<maxcol; i++) {
+		if (obuf[i].c_mode != lastmode) {
+			hadmodes++;
+			setmode(obuf[i].c_mode);
+			lastmode = obuf[i].c_mode;
+		}
+		if (obuf[i].c_char == '\0') {
+			if (upln)
+				PRINT(CURS_RIGHT);
+			else
+				outc(' ');
+		} else
+			outc(obuf[i].c_char);
+	}
+	if (lastmode != NORMAL) {
+		setmode(0);
+	}
+	if (must_overstrike && hadmodes)
+		overstrike();
+	putchar('\n');
+	if (iflag && hadmodes)
+		iattr();
+	(void)fflush(stdout);
+	if (upln)
+		upln--;
+	initbuf();
+}
+
+/*
+ * For terminals that can overstrike, overstrike underlines and bolds.
+ * We don't do anything with halfline ups and downs, or Greek.
+ */
+overstrike()
+{
+	register int i;
+	char lbuf[256];
+	register char *cp = lbuf;
+	int hadbold=0;
+
+	/* Set up overstrike buffer */
+	for (i=0; i<maxcol; i++)
+		switch (obuf[i].c_mode) {
+		case NORMAL:
+		default:
+			*cp++ = ' ';
+			break;
+		case UNDERL:
+			*cp++ = '_';
+			break;
+		case BOLD:
+			*cp++ = obuf[i].c_char;
+			hadbold=1;
+			break;
+		}
+	putchar('\r');
+	for (*cp=' '; *cp==' '; cp--)
+		*cp = 0;
+	for (cp=lbuf; *cp; cp++)
+		putchar(*cp);
+	if (hadbold) {
+		putchar('\r');
+		for (cp=lbuf; *cp; cp++)
+			putchar(*cp=='_' ? ' ' : *cp);
+		putchar('\r');
+		for (cp=lbuf; *cp; cp++)
+			putchar(*cp=='_' ? ' ' : *cp);
+	}
+}
+
+iattr()
+{
+	register int i;
+	char lbuf[256];
+	register char *cp = lbuf;
+
+	for (i=0; i<maxcol; i++)
+		switch (obuf[i].c_mode) {
+		case NORMAL:	*cp++ = ' '; break;
+		case ALTSET:	*cp++ = 'g'; break;
+		case SUPERSC:	*cp++ = '^'; break;
+		case SUBSC:	*cp++ = 'v'; break;
+		case UNDERL:	*cp++ = '_'; break;
+		case BOLD:	*cp++ = '!'; break;
+		default:	*cp++ = 'X'; break;
+		}
+	for (*cp=' '; *cp==' '; cp--)
+		*cp = 0;
+	for (cp=lbuf; *cp; cp++)
+		putchar(*cp);
+	putchar('\n');
+}
+
+initbuf()
+{
+
+	bzero((char *)obuf, sizeof (obuf));	/* depends on NORMAL == 0 */
+	col = 0;
+	maxcol = 0;
+	mode &= ALTSET;
+}
+
+fwd()
+{
+	register oldcol, oldmax;
+
+	oldcol = col;
+	oldmax = maxcol;
+	flushln();
+	col = oldcol;
+	maxcol = oldmax;
+}
+
+reverse()
+{
+	upln++;
+	fwd();
+	PRINT(CURS_UP);
+	PRINT(CURS_UP);
+	upln++;
+}
+
+initcap()
+{
+	static char tcapbuf[512];
+	char *bp = tcapbuf;
+	char *getenv(), *tgetstr();
+
+	/* This nonsense attempts to work with both old and new termcap */
+	CURS_UP =		tgetstr("up", &bp);
+	CURS_RIGHT =		tgetstr("ri", &bp);
+	if (CURS_RIGHT == NULL)
+		CURS_RIGHT =	tgetstr("nd", &bp);
+	CURS_LEFT =		tgetstr("le", &bp);
+	if (CURS_LEFT == NULL)
+		CURS_LEFT =	tgetstr("bc", &bp);
+	if (CURS_LEFT == NULL && tgetflag("bs"))
+		CURS_LEFT =	"\b";
+
+	ENTER_STANDOUT =	tgetstr("so", &bp);
+	EXIT_STANDOUT =		tgetstr("se", &bp);
+	ENTER_UNDERLINE =	tgetstr("us", &bp);
+	EXIT_UNDERLINE =	tgetstr("ue", &bp);
+	ENTER_DIM =		tgetstr("mh", &bp);
+	ENTER_BOLD =		tgetstr("md", &bp);
+	ENTER_REVERSE =		tgetstr("mr", &bp);
+	EXIT_ATTRIBUTES =	tgetstr("me", &bp);
+
+	if (!ENTER_BOLD && ENTER_REVERSE)
+		ENTER_BOLD = ENTER_REVERSE;
+	if (!ENTER_BOLD && ENTER_STANDOUT)
+		ENTER_BOLD = ENTER_STANDOUT;
+	if (!ENTER_UNDERLINE && ENTER_STANDOUT) {
+		ENTER_UNDERLINE = ENTER_STANDOUT;
+		EXIT_UNDERLINE = EXIT_STANDOUT;
+	}
+	if (!ENTER_DIM && ENTER_STANDOUT)
+		ENTER_DIM = ENTER_STANDOUT;
+	if (!ENTER_REVERSE && ENTER_STANDOUT)
+		ENTER_REVERSE = ENTER_STANDOUT;
+	if (!EXIT_ATTRIBUTES && EXIT_STANDOUT)
+		EXIT_ATTRIBUTES = EXIT_STANDOUT;
+	
+	/*
+	 * Note that we use REVERSE for the alternate character set,
+	 * not the as/ae capabilities.  This is because we are modelling
+	 * the model 37 teletype (since that's what nroff outputs) and
+	 * the typical as/ae is more of a graphics set, not the greek
+	 * letters the 37 has.
+	 */
+
+	UNDER_CHAR =		tgetstr("uc", &bp);
+	must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
+}
+
+outchar(c)
+	int c;
+{
+	putchar(c & 0177);
+}
+
+static int curmode = 0;
+
+outc(c)
+	int c;
+{
+	putchar(c);
+	if (must_use_uc && (curmode&UNDERL)) {
+		PRINT(CURS_LEFT);
+		PRINT(UNDER_CHAR);
+	}
+}
+
+setmode(newmode)
+	int newmode;
+{
+	if (!iflag) {
+		if (curmode != NORMAL && newmode != NORMAL)
+			setmode(NORMAL);
+		switch (newmode) {
+		case NORMAL:
+			switch(curmode) {
+			case NORMAL:
+				break;
+			case UNDERL:
+				PRINT(EXIT_UNDERLINE);
+				break;
+			default:
+				/* This includes standout */
+				PRINT(EXIT_ATTRIBUTES);
+				break;
+			}
+			break;
+		case ALTSET:
+			PRINT(ENTER_REVERSE);
+			break;
+		case SUPERSC:
+			/*
+			 * This only works on a few terminals.
+			 * It should be fixed.
+			 */
+			PRINT(ENTER_UNDERLINE);
+			PRINT(ENTER_DIM);
+			break;
+		case SUBSC:
+			PRINT(ENTER_DIM);
+			break;
+		case UNDERL:
+			PRINT(ENTER_UNDERLINE);
+			break;
+		case BOLD:
+			PRINT(ENTER_BOLD);
+			break;
+		default:
+			/*
+			 * We should have some provision here for multiple modes
+			 * on at once.  This will have to come later.
+			 */
+			PRINT(ENTER_STANDOUT);
+			break;
+		}
+	}
+	curmode = newmode;
+}