2320        elements out of order for descriptive clarity. The actual structure
2321        definitions are contained in <procfs.h>.
2322 
2323 BUGS
2324        Because the old ioctl(2)-based version of /proc is currently supported
2325        for binary compatibility with old applications, the top-level directory
2326        for a process, /proc/pid, is not world-readable, but it is world-
2327        searchable. Thus, anyone can open /proc/pid/psinfo even though ls(1)
2328        applied to /proc/pid will fail for anyone but the owner or an
2329        appropriately privileged process. Support for the old ioctl(2)-based
2330        version of /proc will be dropped in a future release, at which time the
2331        top-level directory for a process will be made world-readable.
2332 
2333 
2334        On SPARC based machines, the types gregset_t and fpregset_t defined in
2335        <sys/regset.h> are similar to but not the same as the types prgregset_t
2336        and prfpregset_t defined in <procfs.h>.
2337 
2338 
2339 
2340                                  July 23, 2015                         PROC(4)

2320        elements out of order for descriptive clarity. The actual structure
2321        definitions are contained in <procfs.h>.
2322 
2323 BUGS
2324        Because the old ioctl(2)-based version of /proc is currently supported
2325        for binary compatibility with old applications, the top-level directory
2326        for a process, /proc/pid, is not world-readable, but it is world-
2327        searchable. Thus, anyone can open /proc/pid/psinfo even though ls(1)
2328        applied to /proc/pid will fail for anyone but the owner or an
2329        appropriately privileged process. Support for the old ioctl(2)-based
2330        version of /proc will be dropped in a future release, at which time the
2331        top-level directory for a process will be made world-readable.
2332 
2333 
2334        On SPARC based machines, the types gregset_t and fpregset_t defined in
2335        <sys/regset.h> are similar to but not the same as the types prgregset_t
2336        and prfpregset_t defined in <procfs.h>.
2337 
2338 
2339 
2340                                  June 6, 2016                          PROC(4)