initial population

2 files changed, 269 insertions, 0 deletions

diff --git a/usr.bin/expand/expand.1 b/usr.bin/expand/expand.1
new file mode 100644
index 0000000..5f36025
--- /dev/null
+++ b/usr.bin/expand/expand.1
@@ -0,0 +1,87 @@
+.\"	$NetBSD: expand.1,v 1.12 2012/05/12 14:52:57 reed Exp $
+.\"
+.\" Copyright (c) 1980, 1990, 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. 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.
+.\"
+.\"	@(#)expand.1	8.1 (Berkeley) 6/9/93
+.\"
+.Dd December 20, 2008
+.Dt EXPAND 1
+.Os
+.Sh NAME
+.Nm expand ,
+.Nm unexpand
+.Nd expand tabs to spaces, and vice versa
+.Sh SYNOPSIS
+.Nm
+.Op Fl t Ar tabstop
+.Op Fl t Ar tab1,tab2,...,tabn
+.Op Ar
+.Nm unexpand
+.Op Fl a
+.Op Fl t Ar tab1,tab2,...,tabn
+.Op Ar
+.Sh DESCRIPTION
+.Nm
+processes the named files or the standard input writing
+the standard output with tabs changed into blanks.
+Backspace characters are preserved into the output and decrement
+the column count for tab calculations.
+.Nm
+is useful for pre-processing character files
+(before sorting, looking at specific columns, etc.) that
+contain tabs.
+.Pp
+If a single
+.Ar tabstop
+argument is given, then tabs are set
+.Ar tabstop
+spaces apart instead of the default 8.
+If multiple tabstops are given then the tabs are set at those
+specific columns.
+.Pp
+.Nm unexpand
+puts tabs back into the data from the standard input or the named
+files and writes the result on the standard output.
+.Pp
+Option (with
+.Nm unexpand
+only):
+.Bl -tag -width flag
+.It Fl a
+By default, only leading blanks and tabs
+are reconverted to maximal strings of tabs.
+If the
+.Fl a
+option is given, then tabs are inserted whenever they would compress the
+resultant file by replacing two or more characters.
+.El
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 1 .
diff --git a/usr.bin/expand/expand.c b/usr.bin/expand/expand.c
new file mode 100644
index 0000000..c69fda1
--- /dev/null
+++ b/usr.bin/expand/expand.c
@@ -0,0 +1,182 @@
+/*	$NetBSD: expand.c,v 1.14 2016/09/05 00:40:28 sevan Exp $	*/
+
+/*
+ * 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. 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
+ The Regents of the University of California.  All rights reserved.");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)expand.c	8.1 (Berkeley) 6/9/93";
+#endif
+__RCSID("$NetBSD: expand.c,v 1.14 2016/09/05 00:40:28 sevan Exp $");
+#endif /* not lint */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <err.h>
+
+/*
+ * expand - expand tabs to equivalent spaces
+ */
+size_t	nstops;
+size_t	tabstops[100];
+
+static	void	getstops(const char *);
+static	void	usage(void) __dead;
+
+int
+main(int argc, char *argv[])
+{
+	int c;
+	size_t n, column;
+
+	setprogname(argv[0]);
+
+	/* handle obsolete syntax */
+	while (argc > 1 &&
+	    argv[1][0] == '-' && isdigit((unsigned char)argv[1][1])) {
+		getstops(&argv[1][1]);
+		argc--; argv++;
+	}
+
+	while ((c = getopt (argc, argv, "t:")) != -1) {
+		switch (c) {
+		case 't':
+			getstops(optarg);
+			break;
+		case '?':
+		default:
+			usage();
+			/* NOTREACHED */
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	do {
+		if (argc > 0) {
+			if (freopen(argv[0], "r", stdin) == NULL)
+				err(EXIT_FAILURE, "Cannot open `%s'", argv[0]);
+			argc--, argv++;
+		}
+		column = 0;
+		while ((c = getchar()) != EOF) {
+			switch (c) {
+			case '\t':
+				if (nstops == 0) {
+					do {
+						putchar(' ');
+						column++;
+					} while (column & 07);
+					continue;
+				}
+				if (nstops == 1) {
+					do {
+						putchar(' ');
+						column++;
+					} while (((column - 1) % tabstops[0])
+					    != (tabstops[0] - 1));
+					continue;
+				}
+				for (n = 0; n < nstops; n++)
+					if (tabstops[n] > column)
+						break;
+				if (n == nstops) {
+					putchar(' ');
+					column++;
+					continue;
+				}
+				while (column < tabstops[n]) {
+					putchar(' ');
+					column++;
+				}
+				continue;
+
+			case '\b':
+				if (column)
+					column--;
+				putchar('\b');
+				continue;
+
+			default:
+				putchar(c);
+				column++;
+				continue;
+
+			case '\n':
+				putchar(c);
+				column = 0;
+				continue;
+			}
+		}
+	} while (argc > 0);
+	return EXIT_SUCCESS;
+}
+
+static void
+getstops(const char *spec)
+{
+	int i;
+	const char *cp = spec;
+
+	nstops = 0;
+	for (;;) {
+		i = 0;
+		while (*cp >= '0' && *cp <= '9')
+			i = i * 10 + *cp++ - '0';
+		if (i <= 0 || i > 256)
+			errx(EXIT_FAILURE, "Too large tab stop spec `%d'", i);
+		if (nstops > 0 && (size_t)i <= tabstops[nstops-1])
+			errx(EXIT_FAILURE, "Out of order tabstop spec `%d'", i);
+		if (nstops == sizeof(tabstops) / sizeof(tabstops[0]) - 1)
+			errx(EXIT_FAILURE, "Too many tabstops");
+		tabstops[nstops++] = i;
+		if (*cp == '\0')
+			break;
+		if (*cp != ',' && *cp != ' ')
+			errx(EXIT_FAILURE, "Illegal tab stop spec `%s'", spec);
+		cp++;
+	}
+}
+
+static void
+usage(void)
+{
+
+	(void)fprintf(stderr, "Usage: %s [-t tablist] [file ...]\n",
+	    getprogname());
+	exit(EXIT_FAILURE);
+}