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aux/kbdfs: accept names for layers in writes to kbmap

--- a/sys/src/cmd/aux/kbdfs/kbdfs.c

+++ b/sys/src/cmd/aux/kbdfs/kbdfs.c

@@ -135,6 +135,19 @@

 Channel *kbdchan;	/* chan(char*) */

 Channel *intchan;	/* chan(int) */

+char *layertab[Nlayers] = {

+	[Lnone]		"none",

+	[Lshift]	"shift",

+	[Lesc1]		"esc",

+	[Laltgr]	"altgr",

+	[Lctl]		"ctl",

+	[Lctrlesc1]	"ctlesc",

+	[Lshiftesc1]	"shiftesc",

+	[Lshiftaltgr]	"shiftaltgr",

+	[Lmod4]		"mod4",

+	[Laltgrmod4]	"altgrmod4",

+};

+

 /* /sys/lib/kbmap/ascii defaults */

 Rune ascii[Nlayers][Nscan] = {

@@ -1208,7 +1221,7 @@

 void

 kbmapwrite(Req *req)

 {

-	char line[100], *lp, *b;

+	char line[100], *lp, *b, *e;

 	Rune r, *rp;

 	int sc, t, l;

 	Fid *f;

@@ -1232,14 +1245,24 @@

 				respond(req, Ebadarg);

 				return;

 			}

-			if(*line == '\n' || *line == '#'){

-				lp = line;

-				continue;

-			}

 			lp = line;

+			if(*line == '\n' || *line == '#')

+				continue;

 			while(*lp == ' ' || *lp == '\t')

 				lp++;

-			t = strtoul(line, &lp, 0);

+			for(e = lp; strchr("\t ", *e) == nil; e++)

+				;

+			if(e == lp)

+				goto Badarg;

+			*e = '\0';

+			for(t = 0; t < nelem(layertab); t++){

+				if(strcmp(lp, layertab[t]) != 0)

+					continue;

+				break;

+			}

+			if(t == nelem(layertab))

+				t = strtoul(lp, nil, 0);

+			lp = e + 1;

 			sc = strtoul(lp, &lp, 0);

 			while(*lp == ' ' || *lp == '\t')

 				lp++;