BSD 4.4 Lite Usr.bin Sources

3 files changed, 221 insertions, 0 deletions

diff --git a/usr.bin/fold/Makefile b/usr.bin/fold/Makefile
new file mode 100644
index 0000000..4d80007
--- /dev/null
+++ b/usr.bin/fold/Makefile
@@ -0,0 +1,5 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+
+PROG=	fold
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/fold/fold.1 b/usr.bin/fold/fold.1
new file mode 100644
index 0000000..1ebb523
--- /dev/null
+++ b/usr.bin/fold/fold.1
@@ -0,0 +1,64 @@
+.\" 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.
+.\"
+.\"	@(#)fold.1	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt FOLD 1
+.Os
+.Sh NAME
+.Nm fold
+.Nd "fold long lines for finite width output device"
+.Sh SYNOPSIS
+.Nm fold
+.Op Fl w Ar width
+.Ar
+.Sh DESCRIPTION
+.Nm Fold
+is a filter which folds the contents of the specified files,
+or the standard input if no files are specified,
+breaking the lines to have maximum of 80 characters.
+.Pp
+The options are as follows:
+.Bl -tag -width indent
+.It Fl w
+Specifies a line width to use instead of the default 80 characters.
+.Ar Width
+should be a multiple of 8 if tabs are present, or the tabs should
+be expanded using
+.Xr expand 1
+before using
+.Nm fold .
+.El
+.Sh SEE ALSO
+.Xr expand 1
+.Sh BUGS
+If underlining is present it may be messed up by folding.
diff --git a/usr.bin/fold/fold.c b/usr.bin/fold/fold.c
new file mode 100644
index 0000000..983a492
--- /dev/null
+++ b/usr.bin/fold/fold.c
@@ -0,0 +1,152 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kevin Ruddy.
+ *
+ * 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) 1990, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)fold.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <stdio.h>
+#include <string.h>
+
+#define	DEFLINEWIDTH	80
+
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	extern int errno, optind;
+	extern char *optarg;
+	register int ch;
+	int width;
+	char *p;
+
+	width = -1;
+	while ((ch = getopt(argc, argv, "0123456789w:")) != EOF)
+		switch (ch) {
+		case 'w':
+			if ((width = atoi(optarg)) <= 0) {
+				(void)fprintf(stderr,
+				    "fold: illegal width value.\n");
+				exit(1);
+			}
+			break;
+		case '0': case '1': case '2': case '3': case '4':
+		case '5': case '6': case '7': case '8': case '9':
+			if (width == -1) {
+				p = argv[optind - 1];
+				if (p[0] == '-' && p[1] == ch && !p[2])
+					width = atoi(++p);
+				else
+					width = atoi(argv[optind] + 1);
+			}
+			break;
+		default:
+			(void)fprintf(stderr,
+			    "usage: fold [-w width] [file ...]\n");
+			exit(1);
+		}
+	argv += optind;
+	argc -= optind;
+
+	if (width == -1)
+		width = DEFLINEWIDTH;
+	if (!*argv)
+		fold(width);
+	else for (; *argv; ++argv)
+		if (!freopen(*argv, "r", stdin)) {
+			(void)fprintf(stderr,
+			    "fold: %s: %s\n", *argv, strerror(errno));
+			exit(1);
+		} else
+			fold(width);
+	exit(0);
+}
+
+fold(width)
+	register int width;
+{
+	register int ch, col, new;
+
+	for (col = 0;;) {
+		switch (ch = getchar()) {
+		case EOF:
+			return;
+		case '\b':
+			new = col ? col - 1 : 0;
+			break;
+		case '\n':
+		case '\r':
+			new = 0;
+			break;
+		case '\t':
+			new = (col + 8) & ~7;
+			break;
+		default:
+			new = col + 1;
+			break;
+		}
+
+		if (new > width) {
+			putchar('\n');
+			col = 0;
+		}
+		putchar(ch);
+
+		switch (ch) {
+		case '\b':
+			if (col > 0)
+				--col;
+			break;
+		case '\n':
+		case '\r':
+			col = 0;
+			break;
+		case '\t':
+			col += 8;
+			col &= ~7;
+			break;
+		default:
+			++col;
+			break;
+		}
+	}
+}