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	tgrep: update from Plan 9 - plan9port - [fork] Plan 9 from user space
	git clone git://src.adamsgaard.dk/plan9port
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	---
	commit 93c75d2bad341af383520409fd354dcff3f2c279
	parent de3b6d5848d5361490ed049154985d01dd5068f9
	Author: David du Colombier <[email protected]>
	Date: Mon, 1 Oct 2018 17:20:35 +0200

	grep: update from Plan 9

	This change fixes a segfault in grep -e when no argument
	has been provided. Thanks to Sean Hinchee for reporting
	tthis issue.

	Fixes #186.

	Diffstat:
	M src/cmd/grep/main.c \| 6 +++---

	1 file changed, 3 insertions(+), 3 deletions(-)
	---
	diff --git a/src/cmd/grep/main.c b/src/cmd/grep/main.c
	t@@ -5,7 +5,7 @@ char *validflags = "bchiLlnsv";
	void
	usage(void)
	{
	- fprint(2, "usage: grep [-%s] [-f file] [-e expr] [file ...]\n", validf…
	+ fprint(2, "usage: grep [-%s] [-e pattern] [-f patternfile] [file ...]\…
	exits("usage");
	}

	t@@ -31,12 +31,12 @@ main(int argc, char *argv[])
	case 'e':
	flags['e']++;
	lineno = 0;
	- str2top(ARGF());
	+ str2top(EARGF(usage()));
	break;

	case 'f':
	flags['f']++;
	- filename = ARGF();
	+ filename = EARGF(usage());
	rein = Bopen(filename, OREAD);
	if(rein == 0) {
	fprint(2, "grep: can't open %s: %r\n", filename);