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.Dd May 11, 2016 .Dt PISPROCIDR 3PROC .Os .Sh NAME .Nm Pisprocdir .Nd determine if a directory is the /proc directory .Sh SYNOPSIS .Lb libproc n libproc.h .Ft int .Fo Pisprocdir .Fa "struct ps_prochandle *P" .Fa "const char *dir" .Fc .Sh DESECRIPTION The .Fn Pisprocdir function determines whether or not the directory .Fa dir is the root of the /proc file-system. This works across loopback file system (lofs) mounts and chroots. .Sh RETURN VALUES Upon successful completion, the .Fn Pisprocdir function returns .Sy 1 if .Fa dir is the /proc directory, otherwise if not, it returns .Sy 0 . .Sh INTERFACE STABILITY .Sy Uncommitted .Sh MT-LEVEL See .Sy LOCKING in .Xr libproc 3LIB . .Sh SEE ALSO .Xr libproc 3LIB , .Xr proc 4 , .Xr lofs 7FS