On Sun, 8 Apr 2012 09:55:46 -0600, Steve Comstock wrote: >On 4/8/2012 9:46 AM, Sam Siegel wrote: >> I'm trying to find the manual (by full name or number) that provides >> precise definitions about pathnames (hfs and zfs) for the unix subsystem >> on zos. Specifically, I'm interested in knowing the maximum length: >> >> 1) Entire path from '/' on down >> 2) Maximum number of characters in a file in a directory >> ... > >1. 1023 > >2. 255 > This is probably in /usr/include/limits.h
With some nasty associated facts that I learned when I was trying to write a command interface to realpath(): o realpath() appears to provide no protection against buffer overrun. o By descending a directory hierarchy, one can create a pathname far longer than that limit. o While many UNIX-like systems provide a definition of PATH_MAX in /usr/include/limits.h, POSIX deprecates this, and USS does not provide one. IBM gives the rationale that the limit is filesystem- dependent and code relying on it might become obsoleted by new technology. o A very deep path can cause "rm -rf" to fail in violation of POSIX spec with a "too many open files" error. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
