From 60e8720fc68b78dda97d68ba497fd01a8ee8a49e Mon Sep 17 00:00:00 2001
From: bdrewery <bdrewery@FreeBSD.org>
Date: Sat, 3 Oct 2015 18:57:15 +0000
Subject: Add decoding for struct statfs.

Reviewed by:	jhb (briefly)
---
 usr.bin/truss/syscall.h  |  3 ++-
 usr.bin/truss/syscalls.c | 28 ++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)

(limited to 'usr.bin')

diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
index ee35214..18dd33f 100644
--- a/usr.bin/truss/syscall.h
+++ b/usr.bin/truss/syscall.h
@@ -10,6 +10,7 @@
  * BinString -- pointer to an array of chars, printed via strvisx().
  * Ptr -- pointer to some unspecified structure.  Just print as hex for now.
  * Stat -- a pointer to a stat buffer.  Prints a couple fields.
+ * StatFs -- a pointer to a statfs buffer.  Prints a few fields.
  * Ioctl -- an ioctl command.  Woefully limited.
  * Quad -- a double-word value.  e.g., lseek(int, offset_t, int)
  * Signal -- a signal number.  Prints the signal name (SIGxxx)
@@ -38,7 +39,7 @@
 enum Argtype { None = 1, Hex, Octal, Int, LongHex, Name, Ptr, Stat, Ioctl, Quad,
 	Signal, Sockaddr, StringArray, Timespec, Timeval, Itimerval, Pollfd,
 	Fd_set, Sigaction, Fcntl, Mprot, Mmapflags, Whence, Readlinkres,
-	Sigset, Sigprocmask, Kevent, Sockdomain, Socktype, Open,
+	Sigset, Sigprocmask, StatFs, Kevent, Sockdomain, Socktype, Open,
 	Fcntlflag, Rusage, BinString, Shutdown, Resource, Rlimit, Timeval2,
 	Pathconf, Rforkflags, ExitStatus, Waitoptions, Idtype, Procctl,
 	LinuxSockArgs, Umtxop, Atfd, Atflags, Timespec2, Accessmode, Long,
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index ab163d8..1af6d35 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/event.h>
 #include <sys/ioccom.h>
 #include <sys/mman.h>
+#include <sys/mount.h>
 #include <sys/procctl.h>
 #include <sys/ptrace.h>
 #include <sys/resource.h>
@@ -182,6 +183,10 @@ static struct syscall syscalls[] = {
 		    { Atflags, 3 } } },
 	{ .name = "stat", .ret_type = 1, .nargs = 2,
 	  .args = { { Name | IN, 0 }, { Stat | OUT, 1 } } },
+	{ .name = "statfs", .ret_type = 1, .nargs = 2,
+	  .args = { { Name | IN, 0 }, { StatFs | OUT, 1 } } },
+	{ .name = "fstatfs", .ret_type = 1, .nargs = 2,
+	  .args = { { Int, 0 }, { StatFs | OUT, 1 } } },
 	{ .name = "lstat", .ret_type = 1, .nargs = 2,
 	  .args = { { Name | IN, 0 }, { Stat | OUT, 1 } } },
 	{ .name = "linux_newstat", .ret_type = 1, .nargs = 2,
@@ -1444,6 +1449,29 @@ print_arg(struct syscall_args *sc, unsigned long *args, long *retval,
 		}
 		break;
 	}
+	case StatFs: {
+		unsigned int i;
+		struct statfs buf;
+		if (get_struct(pid, (void *)args[sc->offset], &buf,
+		    sizeof(buf)) != -1) {
+			char fsid[17];
+
+			bzero(fsid, sizeof(fsid));
+			if (buf.f_fsid.val[0] != 0 || buf.f_fsid.val[1] != 0) {
+			        for (i = 0; i < sizeof(buf.f_fsid); i++)
+					snprintf(&fsid[i*2],
+					    sizeof(fsid) - (i*2), "%02x",
+					    ((u_char *)&buf.f_fsid)[i]);
+			}
+			fprintf(fp,
+			    "{ fstypename=%s,mntonname=%s,mntfromname=%s,"
+			    "fsid=%s }", buf.f_fstypename, buf.f_mntonname,
+			    buf.f_mntfromname, fsid);
+		} else
+			fprintf(fp, "0x%lx", args[sc->offset]);
+		break;
+	}
+
 	case Rusage: {
 		struct rusage ru;
 
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