Decode the "wence" arg to lseek and linux_lseek.

2 files changed, 16 insertions, 2 deletions

diff --git a/usr.bin/truss/syscall.h b/usr.bin/truss/syscall.h
index a6cdbec..ff57f72 100644
--- a/usr.bin/truss/syscall.h
+++ b/usr.bin/truss/syscall.h
@@ -32,7 +32,7 @@
 
 enum Argtype { None = 1, Hex, Octal, Int, String, Ptr, Stat, Ioctl, Quad,
 	Signal, Sockaddr, StringArray, Timespec, Timeval, Itimerval, Pollfd, 
-	Fd_set, Sigaction, Fcntl, Mprot, Mmapflags };
+	Fd_set, Sigaction, Fcntl, Mprot, Mmapflags, Whence };
 
 #define ARG_MASK	0xff
 #define OUT	0x100
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index 83ad2aa..fff0555 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -73,7 +73,9 @@ struct syscall syscalls[] = {
 	{ "readlink", 1, 3,
 	  { { String, 0 } , { String | OUT, 1 }, { Int, 2 }}},
 	{ "lseek", 2, 3,
-	  { { Int, 0 }, {Quad, 2 }, { Int, 4 }}},
+	  { { Int, 0 }, {Quad, 2 }, { Whence, 4 }}},
+	{ "linux_lseek", 2, 3,
+	  { { Int, 0 }, {Int, 1 }, { Whence, 2 }}},
 	{ "mmap", 2, 6,
 	  { { Ptr, 0 }, {Int, 1}, {Mprot, 2}, {Mmapflags, 3}, {Int, 4}, {Quad, 6}}},
 	{ "mprotect", 1, 3,
@@ -524,6 +526,18 @@ print_arg(int fd, struct syscall_args *sc, unsigned long *args) {
     }
     break;
 
+  case Whence:
+    {
+	switch (args[sc->offset]) {
+#define S(a)	case a: tmp = strdup(#a); break;
+	S(SEEK_SET);
+	S(SEEK_CUR);
+	S(SEEK_END);
+#undef S
+	default: asprintf(&tmp, "0x%lx", args[sc->offset]); break;
+	}
+    }
+    break;
   case Sockaddr:
     {
       struct sockaddr_storage ss;