Index: usr.bin/grep/file.c
===================================================================
--- usr.bin/grep/file.c
+++ usr.bin/grep/file.c
@@ -197,7 +197,7 @@
 	}
 
 	/* Look for a newline in the remaining part of the buffer */
-	if ((p = memchr(bufpos, '\n', bufrem)) != NULL) {
+	if ((p = memchr(bufpos, fileeol, bufrem)) != NULL) {
 		++p; /* advance over newline */
 		ret = bufpos;
 		len = p - bufpos;
@@ -219,7 +219,7 @@
 		if (bufrem == 0)
 			/* EOF: return partial line */
 			break;
-		if ((p = memchr(bufpos, '\n', bufrem)) == NULL &&
+		if ((p = memchr(bufpos, fileeol, bufrem)) == NULL &&
 		    filebehave != FILE_MMAP)
 			continue;
 		if (p == NULL) {
@@ -322,7 +322,7 @@
 		goto error2;
 
 	/* Check for binary stuff, if necessary */
-	if (binbehave != BINFILE_TEXT && memchr(bufpos, '\0', bufrem) != NULL)
+	if (binbehave != BINFILE_TEXT && fileeol != '\0' && memchr(bufpos, '\0', bufrem) != NULL)
 	f->binary = true;
 
 	return (f);
Index: usr.bin/grep/grep.h
===================================================================
--- usr.bin/grep/grep.h
+++ usr.bin/grep/grep.h
@@ -116,6 +116,7 @@
 extern unsigned long long Aflag, Bflag;
 extern long long mcount;
 extern long long mlimit;
+extern char fileeol;
 extern char	*label;
 extern const char *color;
 extern int	 binbehave, devbehave, dirbehave, filebehave, grepbehave, linkbehave;
Index: usr.bin/grep/grep.1
===================================================================
--- usr.bin/grep/grep.1
+++ usr.bin/grep/grep.1
@@ -40,7 +40,7 @@
 .Sh SYNOPSIS
 .Nm grep
 .Bk -words
-.Op Fl abcdDEFGHhIiJLlmnOopqRSsUVvwxZ
+.Op Fl abcdDEFGHhIiJLlmnOopqRSsUVvwxZz
 .Op Fl A Ar num
 .Op Fl B Ar num
 .Op Fl C Ns Op Ar num
@@ -374,7 +374,10 @@
 Equivalent to
 .Fl i .
 Obsoleted.
-.It Fl Z , Fl z , Fl Fl decompress
+.It Fl z , Fl Fl null-data
+Treat input and output data as sequences of lines terminated by a
+zero-byte instead of a newline.
+.It Fl Z , Fl Fl decompress
 Force
 .Nm grep
 to behave as
Index: usr.bin/grep/grep.c
===================================================================
--- usr.bin/grep/grep.c
+++ usr.bin/grep/grep.c
@@ -66,7 +66,7 @@
 /* 1*/	"(standard input)",
 /* 2*/	"cannot read bzip2 compressed file",
 /* 3*/	"unknown %s option",
-/* 4*/	"usage: %s [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZ] [-A num] [-B num] [-C[num]]\n",
+/* 4*/	"usage: %s [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZz] [-A num] [-B num] [-C[num]]\n",
 /* 5*/	"\t[-e pattern] [-f file] [--binary-files=value] [--color=when]\n",
 /* 6*/	"\t[--context[=num]] [--directories=action] [--label] [--line-buffered]\n",
 /* 7*/	"\t[--null] [pattern] [file ...]\n",
@@ -109,6 +109,7 @@
 bool	 mflag;		/* -m x: stop reading the files after x matches */
 long long mcount;	/* count for -m */
 long long mlimit;	/* requested value for -m */
+char     fileeol;	/* indicator for eol */
 bool	 nflag;		/* -n: show line numbers in front of matching lines */
 bool	 oflag;		/* -o: print only matching part */
 bool	 qflag;		/* -q: quiet mode (don't output anything) */
@@ -165,7 +166,7 @@
 	exit(2);
 }
 
-static const char	*optstr = "0123456789A:B:C:D:EFGHIJMLOPSRUVZabcd:e:f:hilm:nopqrsuvwxXy";
+static const char	*optstr = "0123456789A:B:C:D:EFGHIJMLOPSRUVZabcd:e:f:hilm:nopqrsuvwxXyz";
 
 static const struct option long_options[] =
 {
@@ -215,6 +216,7 @@
 	{"word-regexp",		no_argument,		NULL, 'w'},
 	{"line-regexp",		no_argument,		NULL, 'x'},
 	{"xz",			no_argument,		NULL, 'X'},
+	{"null-data",          no_argument,            NULL, 'z'},
 	{"decompress",          no_argument,            NULL, 'Z'},
 	{NULL,			no_argument,		NULL, 0}
 };
@@ -377,6 +379,7 @@
 	newarg = 1;
 	prevoptind = 1;
 	needpattern = 1;
+	fileeol = '\n';
 
 	eopts = getenv("GREP_OPTIONS");
 
@@ -598,6 +601,9 @@
 		case 'X':
 			filebehave = FILE_XZ;
 			break;
+		case 'z':
+			fileeol = '\0';
+			break;
 		case 'Z':
 			filebehave = FILE_GZIP;
 			break;
Index: usr.bin/grep/util.c
===================================================================
--- usr.bin/grep/util.c
+++ usr.bin/grep/util.c
@@ -221,7 +221,7 @@
 			else
 				break;
 		}
-		if (ln.len > 0 && ln.dat[ln.len - 1] == '\n')
+		if (ln.len > 0 && ln.dat[ln.len - 1] == fileeol)
 			--ln.len;
 		ln.line_no++;
 
@@ -492,6 +492,6 @@
 		}
 	} else {
 		fwrite(line->dat, line->len, 1, stdout);
-		putchar('\n');
+		putchar(fileeol);
 	}
 }