From 27459358ed4d9060525ff02148eba0939ab4dc04 Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Sat, 18 Mar 2017 18:21:41 +0000
Subject: [PATCH] Decode file flags passed to *chflags*().

While here, decode arguments passed to fchflags() and chflagsat().
---
 usr.bin/truss/syscall.h  |  2 +-
 usr.bin/truss/syscalls.c | 18 ++++++++++++++++--
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
index 0bd96b3373a..878e85f7fc6 100644
--- a/usr.bin/truss/syscall.h
+++ b/usr.bin/truss/syscall.h
@@ -45,7 +45,7 @@ enum Argtype { None = 1, Hex, Octal, Int, UInt, LongHex, Name, Ptr, Stat, Ioctl,
 	Pathconf, Rforkflags, ExitStatus, Waitoptions, Idtype, Procctl,
 	LinuxSockArgs, Umtxop, Atfd, Atflags, Timespec2, Accessmode, Long,
 	Sysarch, ExecArgs, ExecEnv, PipeFds, QuadHex, Utrace, IntArray, Pipe2,
-	CapFcntlRights, Fadvice,
+	CapFcntlRights, Fadvice, FileFlags,
 
 	CloudABIAdvice, CloudABIClockID, ClouduABIFDSFlags,
 	CloudABIFDStat, CloudABIFileStat, CloudABIFileType,
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index c9d6c1314d4..7207ba68f6f 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -99,7 +99,10 @@ static struct syscall decoded_syscalls[] = {
 	{ .name = "chdir", .ret_type = 1, .nargs = 1,
 	  .args = { { Name, 0 } } },
 	{ .name = "chflags", .ret_type = 1, .nargs = 2,
-	  .args = { { Name | IN, 0 }, { Hex, 1 } } },
+	  .args = { { Name | IN, 0 }, { FileFlags, 1 } } },
+	{ .name = "chflagsat", .ret_type = 1, .nargs = 4,
+	  .args = { { Atfd, 0 }, { Name | IN, 1 }, { FileFlags, 2 },
+		    { Atflags, 3 } } },
 	{ .name = "chmod", .ret_type = 1, .nargs = 2,
 	  .args = { { Name, 0 }, { Octal, 1 } } },
 	{ .name = "chown", .ret_type = 1, .nargs = 3,
@@ -125,6 +128,8 @@ static struct syscall decoded_syscalls[] = {
 	{ .name = "faccessat", .ret_type = 1, .nargs = 4,
 	  .args = { { Atfd, 0 }, { Name | IN, 1 }, { Accessmode, 2 },
 		    { Atflags, 3 } } },
+	{ .name = "fchflags", .ret_type = 1, .nargs = 2,
+	  .args = { { Int, 0 }, { FileFlags, 1 } } },
 	{ .name = "fchmod", .ret_type = 1, .nargs = 2,
 	  .args = { { Int, 0 }, { Octal, 1 } } },
 	{ .name = "fchmodat", .ret_type = 1, .nargs = 4,
@@ -189,7 +194,7 @@ static struct syscall decoded_syscalls[] = {
 	{ .name = "kse_release", .ret_type = 0, .nargs = 1,
 	  .args = { { Timespec, 0 } } },
 	{ .name = "lchflags", .ret_type = 1, .nargs = 2,
-	  .args = { { Name | IN, 0 }, { Hex, 1 } } },
+	  .args = { { Name | IN, 0 }, { FileFlags, 1 } } },
 	{ .name = "lchmod", .ret_type = 1, .nargs = 2,
 	  .args = { { Name, 0 }, { Octal, 1 } } },
 	{ .name = "lchown", .ret_type = 1, .nargs = 3,
@@ -1868,6 +1873,15 @@ print_arg(struct syscall_args *sc, unsigned long *args, long *retval,
 	case Fadvice:
 		print_integer_arg(sysdecode_fadvice, fp, args[sc->offset]);
 		break;
+	case FileFlags: {
+		fflags_t rem;
+
+		if (!sysdecode_fileflags(fp, args[sc->offset], &rem))
+			fprintf(fp, "0x%x", rem);
+		else if (rem != 0)
+			fprintf(fp, "|0x%x", rem);
+		break;
+	}
 
 	case CloudABIAdvice:
 		fputs(xlookup(cloudabi_advice, args[sc->offset]), fp);