Change "path" to "file name" whenever possible.
Remove usage comment, as it was a duplication of the code or doc.
Include <wchar.h> if available.
(mbrlen, mbstate_t) [! (HAVE_MBRLEN && HAVE_MBSTATE_T)]: Define.
(NEED_PATHCONF_WRAPPER, PATH_MAX, PATH_MAX_FOR, NAME_MAX,
pathconf_wrapper, portable_chars, dir_ok): Remove.
(NAME_MAX_MINIMUM, PATH_MAX_MINIMUM): New macros.
(pathconf, _PC_NAME_MAX, _PC_PATH_MAX): Define if nonexistent.
(portable_chars_only): New arg FILELEN.
Don't assume ASCII; we might be on an EBCDIC host.
Don't assume unibyte locale in diagnostic.
(component_start, component_len): New functions.
(validate_file_name): Renamed from validate_path. All uses changed.
Pretty much a complete rewrite.
Don't make copy of file arg. Always append trailing slash to
pathconf arg, just in case it's a symlink (this is pure paranoia;
we don't know of any hosts where the trailing slash is required).
Use size_t instead of long int when possible.
Avoid need to call pathconf in most practical cases.
Don't use euidaccess several times to test searchability;
just use lstat once. Reword diagnostic to put the (often very long)
file names last.
OS limits, not file system limits. Component length checks
apply to all components, not merely to existing ones. Say
that nonexistent names are not errors. For -p, omit all
checks based on the underlying file system, not merely length
checks. Explain what the portabile file name character set is.
to a failed fchdir or failed fts_safe_changedir call, set
`sp->fts_cur = p'. Do this by removing the explicit `return NULL;'
statements and setting p->fts_errno so execution falls through
to the common-case code below. Otherwise, after such a failure,
calling fts_close would attempt to free an already-freed buffer.
Reported by Luis Lopez Lopez in http://bugs.debian.org/276352.
(printf invocation): builtin -> built-in, for consistency
with POSIX terminology.
(test invocation, pwd invocation):
Use specific rather than generic language to warn about
built-in commands.
(chroot invocation, env invocation, nice invocation, nohup invocation):
Warn that command must not be a special built-in.
(env invocation): Warn about environment variables with unusual
spellings, or duplicates.
Jim Meyering