--- /dev/fd/63	2006-03-17 19:45:28.381175723 +0100
+++ /home/paolo/man/man2/ptrace-mine.2	2005-10-29 00:53:32.000000000 +0200
@@ -179,6 +179,29 @@
 PTRACE_TRACEME.  Although perhaps not intended, under Linux a traced child
 can be detached in this way regardless of which method was used to initiate
 tracing.  (\fIaddr\fP is ignored.)
+.TP
+PTRACE_SETOPTIONS
+Allows setting some options that influence the ptrace behavior. You can
+set any amount of them by OR'ing and passing them as the \fIdata\fP parameter.
+See the section \fBPtrace Options\fP below.
+.SH PTRACE OPTIONS
+.TP
+PTRACE_O_TRACESYSGOOD
+Makes possible the distinction between a SIGTRAP delivery and a syscall stop.
+When this option is active, the process will appear to be stopped by receipt
+of SIGTRAP|0x80, instead of SIGTRAP.
+.TP
+PTRACE_O_TRACEFORK
+.TP
+PTRACE_O_TRACEVFORK
+.TP
+PTRACE_O_TRACECLONE
+.TP
+PTRACE_O_TRACEEXEC
+.TP
+PTRACE_O_TRACEVFORKDONE
+.TP
+PTRACE_O_TRACEEXIT
 .SH NOTES
 Although arguments to
 .B ptrace
@@ -227,11 +250,21 @@
 request may be \-1, the caller must check
 .I errno
 after such requests to determine whether or not an error occurred.
+.SH BUGS
+On hosts with 2.6 kernel headers, PTRACE_SETOPTIONS is declared with a different
+value than the one for 2.4. This leads to applications compiled with such
+headers to fail when run on 2.4 host kernels.
+.LP
+This can be workarounded by redefining PTRACE_SETOPTIONS to
+PTRACE_OLDSETOPTIONS, if that is defined.
 .SH ERRORS
 .TP
 .B EBUSY
 (i386 only) There was an error with allocating or freeing a debug register.
 .TP
+.B EINVAL
+An attempt was done to set a nonexisting option.
+.TP
 .B EFAULT
 There was an attempt to read from or write to an invalid area in the parent's
 or child's memory, probably because the area wasn't mapped or accessible.