From 4152441f440f4a5a34fdf32b9c1e572cd4769f1c Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Sat, 10 Jun 2017 01:22:40 +0000
Subject: [PATCH] Decode the 'howto' argument to reboot().

---
 usr.bin/truss/syscall.h  | 2 +-
 usr.bin/truss/syscalls.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
index e3737ccbfa1d..5b4fb4d61629 100644
--- a/usr.bin/truss/syscall.h
+++ b/usr.bin/truss/syscall.h
@@ -50,7 +50,7 @@ enum Argtype { None = 1, Hex, Octal, Int, UInt, LongHex, Name, Ptr, Stat, Ioctl,
 	Kldunloadflags, Sizet, Madvice, Socklent, Sockprotocol, Sockoptlevel,
 	Sockoptname, Msgflags, CapRights, PUInt, PQuadHex, Acltype,
 	Extattrnamespace, Minherit, Mlockall, Mountflags, Msync, Priowhich,
-	Ptraceop, Quotactlcmd,
+	Ptraceop, Quotactlcmd, Reboothowto,
 
 	CloudABIAdvice, CloudABIClockID, ClouduABIFDSFlags,
 	CloudABIFDStat, CloudABIFileStat, CloudABIFileType,
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index 9373f70625c5..befb2a701fbf 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -375,6 +375,8 @@ static struct syscall decoded_syscalls[] = {
 	{ .name = "readlinkat", .ret_type = 1, .nargs = 4,
 	  .args = { { Atfd, 0 }, { Name, 1 }, { Readlinkres | OUT, 2 },
 		    { Sizet, 3 } } },
+	{ .name = "reboot", .ret_type = 1, .nargs = 1,
+	  .args = { { Reboothowto, 0 } } },
 	{ .name = "recvfrom", .ret_type = 1, .nargs = 6,
 	  .args = { { Int, 0 }, { BinString | OUT, 1 }, { Sizet, 2 },
 	            { Msgflags, 3 }, { Sockaddr | OUT, 4 },
@@ -2142,6 +2144,9 @@ print_arg(struct syscall_args *sc, unsigned long *args, long *retval,
 		if (!sysdecode_quotactl_cmd(fp, args[sc->offset]))
 			fprintf(fp, "%#x", (int)args[sc->offset]);
 		break;
+	case Reboothowto:
+		print_mask_arg(sysdecode_reboot_howto, fp, args[sc->offset]);
+		break;
 
 	case CloudABIAdvice:
 		fputs(xlookup(cloudabi_advice, args[sc->offset]), fp);