kernel: move nsec to libc

qa/lib/c/asmscall.c

@@ -27,9 +27,9 @@ main(void)
 	uint64_t start, end;
 	char *msg;
 
-	start = sys_nsec();
+	start = sys_remove("#c/time");
 	sleep(1);
-	end = sys_nsec();
+	end = sys_remove("#c/time");
 
 	if (end <= start)
 		ret = 1;

sys/include/libc.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2015 Giacomo Tesio <giacomo@tesio.it>
+ * Copyright (C) 2015-2017 Giacomo Tesio <giacomo@tesio.it>
  *
  * This file is part of the UCB release of Plan 9. It is subject to the license
  * terms in the LICENSE file found in the top-level directory of this
@@ -396,6 +396,7 @@ extern	void	longjmp(jmp_buf, int);
 extern	char*	mktemp(char*);
 extern	double	modf(double, double*);
 extern	void	notejmp(void*, jmp_buf, int);
+extern 	unsigned long nsec(void);
 extern	int	dup(int oldfd, int newfd);
 extern	int	ocreate(const char* path, unsigned int omode, unsigned int perm);
 extern	void	perror(const char*);

sys/src/kern/port/devcons.c

@@ -1039,6 +1039,17 @@ consread(Chan *c, void *buf, long n, int64_t off)
 	return -1;		/* never reached */
 }
 
+static void
+consremove(Chan* c)
+{
+	switch((uint32_t)c->qid.path){
+	default:
+		error(Eperm);
+	case Qtime:
+		errorl("fugit irreparabile tempus", todget(nil));
+	}
+}
+
 static long
 conswrite(Chan *c, void *va, long n, int64_t off)
 {
@@ -1198,7 +1209,7 @@ Dev consdevtab = {
 	devbread,
 	conswrite,
 	devbwrite,
-	devremove,
+	consremove,
 	devwstat,
 };
 

sys/src/kern/port/sysproc.c

@@ -1163,9 +1163,3 @@ syssemrelease(int* addr, int delta)
 
 	return semrelease(s, addr, delta);
 }
-
-long
-sysnsec(void)
-{
-	return todget(nil);
-}

sys/src/lib/c/9sys/nsec.c

@@ -0,0 +1,30 @@
+/*
+ * This file is part of Jehanne.
+ *
+ * Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
+ *
+ * Jehanne is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * Jehanne is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#define PORTABLE_SYSCALLS
+#include <u.h>
+#include <libc.h>
+
+unsigned long
+nsec(void)
+{
+	long r;
+	r = remove("/dev/time");
+	if(r == -1)
+		r = remove("#c/time");
+	return r;
+}

sys/src/lib/c/build.json

@@ -59,6 +59,7 @@
 			"9sys/getppid.c",
 			"9sys/getwd.c",
 			"9sys/iounit.c",
+			"9sys/nsec.c",
 			"9sys/nulldir.c",
 			"9sys/ocreate.c",
 			"9sys/pipe.c",

sys/src/sysconf.json

@@ -202,19 +202,12 @@
 				"int"
 			]
 		},
-		{
-			"Id": 16,
-			"Name": "nsec",
-			"Ret": [
-				"long"
-			]
-		},
 		{
 			"Args": [
 				"const char*",
 				"uint32_t"
 			],
-			"Id": 17,
+			"Id": 16,
 			"Name": "open",
 			"Ret": [
 				"long"
@@ -227,7 +220,7 @@
 				"long",
 				"long"
 			],
-			"Id": 18,
+			"Id": 17,
 			"Name": "pread",
 			"Ret": [
 				"long"
@@ -240,7 +233,7 @@
 				"long",
 				"long"
 			],
-			"Id": 19,
+			"Id": 18,
 			"Name": "pwrite",
 			"Ret": [
 				"long"
@@ -250,7 +243,7 @@
 			"Args": [
 				"const char*"
 			],
-			"Id": 20,
+			"Id": 19,
 			"Name": "remove",
 			"Ret": [
 				"long"
@@ -261,7 +254,7 @@
 				"const void*",
 				"void*"
 			],
-			"Id": 21,
+			"Id": 20,
 			"Name": "rendezvous",
 			"Ret": [
 				"void*"
@@ -271,7 +264,7 @@
 			"Args": [
 				"uint32_t"
 			],
-			"Id": 22,
+			"Id": 21,
 			"Name": "rfork",
 			"Ret": [
 				"int"
@@ -283,7 +276,7 @@
 				"long",
 				"int"
 			],
-			"Id": 23,
+			"Id": 22,
 			"Name": "seek",
 			"Ret": [
 				"long"
@@ -294,7 +287,7 @@
 				"int*",
 				"int"
 			],
-			"Id": 24,
+			"Id": 23,
 			"Name": "semacquire",
 			"Ret": [
 				"int"
@@ -305,7 +298,7 @@
 				"int*",
 				"int"
 			],
-			"Id": 25,
+			"Id": 24,
 			"Name": "semrelease",
 			"Ret": [
 				"int"
@@ -316,7 +309,7 @@
 				"int*",
 				"uint64_t"
 			],
-			"Id": 26,
+			"Id": 25,
 			"Name": "tsemacquire",
 			"Ret": [
 				"int"
@@ -327,7 +320,7 @@
 				"const char*",
 				"const char*"
 			],
-			"Id": 27,
+			"Id": 26,
 			"Name": "unmount",
 			"Ret": [
 				"int"
@@ -337,7 +330,7 @@
 			"Args": [
 				"unsigned long"
 			],
-			"Id": 28,
+			"Id": 27,
 			"Name": "alarm",
 			"Ret": [
 				"long"