initial import of NetBSD tree

7 files changed, 594 insertions, 0 deletions

diff --git a/usr.bin/cmp/Makefile b/usr.bin/cmp/Makefile
new file mode 100644
index 00000000000..32bdfb03727
--- /dev/null
+++ b/usr.bin/cmp/Makefile
@@ -0,0 +1,7 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+#       $NetBSD: Makefile,v 1.3 1995/09/08 03:22:54 tls Exp $
+
+PROG=	cmp
+SRCS=	cmp.c misc.c regular.c special.c
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/cmp/cmp.1 b/usr.bin/cmp/cmp.1
new file mode 100644
index 00000000000..4d3fd05ac40
--- /dev/null
+++ b/usr.bin/cmp/cmp.1
@@ -0,0 +1,109 @@
+.\"     $NetBSD: cmp.1,v 1.4 1995/09/08 03:22:55 tls Exp $
+.\"
+.\" Copyright (c) 1987, 1990, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Institute of Electrical and Electronics Engineers, Inc.
+.\"
+.\" 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.
+.\"
+.\"     @(#)cmp.1	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt CMP 1
+.Os
+.Sh NAME
+.Nm cmp
+.Nd compare two files
+.Sh SYNOPSIS
+.Nm cmp
+.Op Fl l | Fl s
+.Ar file1 file2
+.Op Ar skip1 Op Ar skip2
+.Sh DESCRIPTION
+The cmp utility compares two files of any type and writes the results
+to the standard output.
+By default,
+.Nm
+is silent if the files are the same; if they differ, the byte
+and line number at which the first difference occurred is reported.
+.Pp
+Bytes and lines are numbered beginning with one.
+.Pp
+The following options are available:
+.Bl -tag -width flag
+.It Fl l
+Print the byte number (decimal) and the differing
+byte values (octal) for each difference.
+.It Fl s
+Print nothing for differing files; return exit
+status only.
+.El
+.Pp
+The optional arguments
+.Ar skip1
+and 
+.Ar skip2
+are the byte offsets from the beginning of
+.Ar file1
+and
+.Ar file2 ,
+respectively, where the comparison will begin.
+The offset is decimal by default, but may be expressed as an hexadecimal
+or octal value by preceding it with a leading ``0x'' or ``0''.
+.Pp
+The
+.Nm cmp
+utility exits with one of the following values:
+.Bl -tag -width 4n
+.It 0
+The files are identical.
+.It 1
+The files are different; this includes the case
+where one file is identical to the first part of
+the other.
+In the latter case, if the
+.Fl s
+option has not been specified,
+.Nm cmp
+writes to standard output that EOF was reached in the shorter
+file (before any differences were found).
+.It >1
+An error occurred.
+.El
+.Sh SEE ALSO
+.Xr diff 1 ,
+.Xr diff3 1
+.Sh STANDARDS
+The
+.Nm cmp
+utility is expected to be
+.St -p1003.2
+compatible.
diff --git a/usr.bin/cmp/cmp.c b/usr.bin/cmp/cmp.c
new file mode 100644
index 00000000000..51d17f8186c
--- /dev/null
+++ b/usr.bin/cmp/cmp.c
@@ -0,0 +1,152 @@
+/*      $NetBSD: cmp.c,v 1.7 1995/09/08 03:22:56 tls Exp $      */
+
+/*
+ * Copyright (c) 1987, 1990, 1993, 1994
+ *	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) 1987, 1990, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)cmp.c	8.3 (Berkeley) 4/2/94";
+#else
+static char rcsid[] = "$NetBSD: cmp.c,v 1.7 1995/09/08 03:22:56 tls Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <locale.h>
+
+#include "extern.h"
+
+int	lflag, sflag;
+
+static void usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	struct stat sb1, sb2;
+	off_t skip1, skip2;
+	int ch, fd1, fd2, special;
+	char *file1, *file2;
+
+	setlocale(LC_ALL, "");
+
+	while ((ch = getopt(argc, argv, "ls")) != EOF)
+		switch (ch) {
+		case 'l':		/* print all differences */
+			lflag = 1;
+			break;
+		case 's':		/* silent run */
+			sflag = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+endargs:
+	argv += optind;
+	argc -= optind;
+
+	if (lflag && sflag)
+		errx(ERR_EXIT, "only one of -l and -s may be specified");
+
+	if (argc < 2 || argc > 4)
+		usage();
+
+	/* Backward compatibility -- handle "-" meaning stdin. */
+	special = 0;
+	if (strcmp(file1 = argv[0], "-") == 0) {
+		special = 1;
+		fd1 = 0;
+		file1 = "stdin";
+	}
+	else if ((fd1 = open(file1, O_RDONLY, 0)) < 0)
+		err(ERR_EXIT, "%s", file1);
+	if (strcmp(file2 = argv[1], "-") == 0) {
+		if (special)
+			errx(ERR_EXIT,
+				"standard input may only be specified once");
+		special = 1;
+		fd2 = 0;
+		file2 = "stdin";
+	}
+	else if ((fd2 = open(file2, O_RDONLY, 0)) < 0)
+		err(ERR_EXIT, "%s", file2);
+
+	skip1 = argc > 2 ? strtoq(argv[2], NULL, 10) : 0;
+	skip2 = argc == 4 ? strtoq(argv[3], NULL, 10) : 0;
+
+	if (!special) {
+		if (fstat(fd1, &sb1))
+			err(ERR_EXIT, "%s", file1);
+		if (!S_ISREG(sb1.st_mode))
+			special = 1;
+		else {
+			if (fstat(fd2, &sb2))
+				err(ERR_EXIT, "%s", file2);
+			if (!S_ISREG(sb2.st_mode))
+				special = 1;
+		}
+	}
+
+	if (special)
+		c_special(fd1, file1, skip1, fd2, file2, skip2);
+	else
+		c_regular(fd1, file1, skip1, sb1.st_size,
+		    fd2, file2, skip2, sb2.st_size);
+	exit(0);
+}
+
+static void
+usage()
+{
+
+	(void)fprintf(stderr,
+	    "usage: cmp [-l | s] file1 file2 [skip1 [skip2]]\n");
+	exit(ERR_EXIT);
+}
diff --git a/usr.bin/cmp/extern.h b/usr.bin/cmp/extern.h
new file mode 100644
index 00000000000..ca02c60020d
--- /dev/null
+++ b/usr.bin/cmp/extern.h
@@ -0,0 +1,47 @@
+/*      $NetBSD: extern.h,v 1.2 1995/09/08 03:22:57 tls Exp $      */
+
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	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.
+ *
+ *	@(#)extern.h	8.3 (Berkeley) 4/2/94
+ */
+
+#define OK_EXIT		0
+#define DIFF_EXIT	1
+#define ERR_EXIT	2	/* error exit code */
+
+void	c_regular __P((int, char *, off_t, off_t, int, char *, off_t, off_t));
+void	c_special __P((int, char *, off_t, int, char *, off_t));
+void	diffmsg __P((char *, char *, off_t, off_t));
+void	eofmsg __P((char *));
+
+extern int lflag, sflag;
diff --git a/usr.bin/cmp/misc.c b/usr.bin/cmp/misc.c
new file mode 100644
index 00000000000..a6c83495c7e
--- /dev/null
+++ b/usr.bin/cmp/misc.c
@@ -0,0 +1,70 @@
+/*      $NetBSD: misc.c,v 1.2 1995/09/08 03:22:58 tls Exp $      */
+
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	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
+#if 0
+static char sccsid[] = "@(#)misc.c	8.3 (Berkeley) 4/2/94";
+#else
+static char rcsid[] = "$NetBSD: misc.c,v 1.2 1995/09/08 03:22:58 tls Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/types.h>
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "extern.h"
+
+void
+eofmsg(file)
+	char *file;
+{
+	if (!sflag)
+		warnx("EOF on %s", file);
+	exit(DIFF_EXIT);
+}
+
+void
+diffmsg(file1, file2, byte, line)
+	char *file1, *file2;
+	off_t byte, line;
+{
+	if (!sflag)
+		(void)printf("%s %s differ: char %qd, line %qd\n",
+		    file1, file2, byte, line);
+	exit(DIFF_EXIT);
+}
diff --git a/usr.bin/cmp/regular.c b/usr.bin/cmp/regular.c
new file mode 100644
index 00000000000..d1e8ceae8b4
--- /dev/null
+++ b/usr.bin/cmp/regular.c
@@ -0,0 +1,104 @@
+/*      $NetBSD: regular.c,v 1.2 1995/09/08 03:22:59 tls Exp $      */
+
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	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
+#if 0
+static char sccsid[] = "@(#)regular.c	8.3 (Berkeley) 4/2/94";
+#else
+static char rcsid[] = "$NetBSD: regular.c,v 1.2 1995/09/08 03:22:59 tls Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include <err.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "extern.h"
+
+void
+c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2)
+	int fd1, fd2;
+	char *file1, *file2;
+	off_t skip1, len1, skip2, len2;
+{
+	u_char ch, *p1, *p2;
+	off_t byte, length, line;
+	int dfound;
+
+	if (sflag && len1 != len2)
+		exit(1);
+
+	if (skip1 > len1)
+		eofmsg(file1);
+	len1 -= skip1;
+	if (skip2 > len2)
+		eofmsg(file2);
+	len2 -= skip2;
+
+	length = MIN(len1, len2);
+	if (length > SIZE_T_MAX)
+		return (c_special(fd1, file1, skip1, fd2, file2, skip2));
+
+	if ((p1 = (u_char *)mmap(NULL,
+	    (size_t)length, PROT_READ, 0, fd1, skip1)) == (u_char *)-1)
+		err(ERR_EXIT, "%s", file1);
+	if ((p2 = (u_char *)mmap(NULL,
+	    (size_t)length, PROT_READ, 0, fd2, skip2)) == (u_char *)-1)
+		err(ERR_EXIT, "%s", file2);
+
+	dfound = 0;
+	for (byte = line = 1; length--; ++p1, ++p2, ++byte) {
+		if ((ch = *p1) != *p2)
+			if (lflag) {
+				dfound = 1;
+				(void)printf("%6qd %3o %3o\n", byte, ch, *p2);
+			} else
+				diffmsg(file1, file2, byte, line);
+				/* NOTREACHED */
+		if (ch == '\n')
+			++line;
+	}
+
+	if (len1 != len2)
+		eofmsg (len1 > len2 ? file2 : file1);
+	if (dfound)
+		exit(DIFF_EXIT);
+}
diff --git a/usr.bin/cmp/special.c b/usr.bin/cmp/special.c
new file mode 100644
index 00000000000..4a25bb246e0
--- /dev/null
+++ b/usr.bin/cmp/special.c
@@ -0,0 +1,105 @@
+/*      $NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $      */
+
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	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
+#if 0
+static char sccsid[] = "@(#)special.c	8.3 (Berkeley) 4/2/94";
+#else
+static char rcsid[] = "$NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/types.h>
+
+#include <err.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "extern.h"
+
+void
+c_special(fd1, file1, skip1, fd2, file2, skip2)
+	int fd1, fd2;
+	char *file1, *file2;
+	off_t skip1, skip2;
+{
+	int ch1, ch2;
+	off_t byte, line;
+	FILE *fp1, *fp2;
+	int dfound;
+
+	if ((fp1 = fdopen(fd1, "r")) == NULL)
+		err(ERR_EXIT, "%s", file1);
+	if ((fp2 = fdopen(fd2, "r")) == NULL)
+		err(ERR_EXIT, "%s", file2);
+
+	while (skip1--)
+		if (getc(fp1) == EOF)
+			goto eof;
+	while (skip2--)
+		if (getc(fp2) == EOF)
+			goto eof;
+
+	dfound = 0;
+	for (byte = line = 1;; ++byte) {
+		ch1 = getc(fp1);
+		ch2 = getc(fp2);
+		if (ch1 == EOF || ch2 == EOF)
+			break;
+		if (ch1 != ch2)
+			if (lflag) {
+				dfound = 1;
+				(void)printf("%6qd %3o %3o\n", byte, ch1, ch2);
+			} else
+				diffmsg(file1, file2, byte, line);
+				/* NOTREACHED */
+		if (ch1 == '\n')
+			++line;
+	}
+
+eof:	if (ferror(fp1))
+		err(ERR_EXIT, "%s", file1);
+	if (ferror(fp2))
+		err(ERR_EXIT, "%s", file2);
+	if (feof(fp1)) {
+		if (!feof(fp2))
+			eofmsg(file1);
+	} else
+		if (feof(fp2))
+			eofmsg(file2);
+	if (dfound)
+		exit(DIFF_EXIT);
+}