diff options
Diffstat (limited to 'cddl/contrib/dtracetoolkit/Snippits/fd2pathname.txt')
-rw-r--r-- | cddl/contrib/dtracetoolkit/Snippits/fd2pathname.txt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/cddl/contrib/dtracetoolkit/Snippits/fd2pathname.txt b/cddl/contrib/dtracetoolkit/Snippits/fd2pathname.txt new file mode 100644 index 000000000000..b056e1318135 --- /dev/null +++ b/cddl/contrib/dtracetoolkit/Snippits/fd2pathname.txt @@ -0,0 +1,32 @@ +You have a file descriptor (probably from a syscall), and you want the +corresponding pathname. + +If you are on newer versions of DTrace, there is the fds[] array, + +# dtrace -n 'syscall::read:entry { @[fds[arg0].fi_pathname] = count(); }' +dtrace: description 'syscall::read:entry ' matched 1 probe +^C + + /etc/minor_perm 2 + /etc/mnttab 2 + /etc/motd 2 + /etc/magic 4 + /usr/sbin/clri 5 + /devices/pseudo/clone@0:ptm 6 + /sbin/mount 6 + /dev/pts/28 7 + /devices/pseudo/consms@0:mouse 31 + /devices/pseudo/conskbd@0:kbd 47 + <unknown> 351 + +easy. + +but if you are on an older version of DTrace, try this to convert from +this->fd to self->vpath, + + this->filep = + curthread->t_procp->p_user.u_finfo.fi_list[this->fd].uf_file; + this->vnodep = this->filep != 0 ? this->filep->f_vnode : 0; + self->vpath = this->vnodep ? (this->vnodep->v_path != 0 ? + cleanpath(this->vnodep->v_path) : "<unknown>") : "<unknown>"; + |