coreutils/src/pathchk.c

1 /* pathchk -- check whether file names are valid or portable
67 #  define pathconf(file, flag) \
99 Diagnose invalid or unportable file names.\n\
171 no_leading_hyphen (char const *file)
175   for (p = file;  (p = strchr (p, '-'));  p++)
176     if (p == file || p[-1] == '/')
178         error (0, 0, _("leading `-' in a component of file name %s"),
179                quote (file));
190 portable_chars_only (char const *file, size_t filelen)
192   size_t validlen = strspn (file,
197   char const *invalid = file + validlen;
204              _("nonportable character %s in file name %s"),
207              quote_n (0, file));
214 /* Return the address of the start of the next file name component in F.  */
224 /* Return the size of the file name component F.  F must be nonempty.  */
247    If CHECK_EXTRA_PORTABILITY is true, check that file name components do not
251    check that the file name is not empty.
256 validate_file_name (char *file, bool check_basic_portability,
259   size_t filelen = strlen (file);
261   /* Start of file name component being checked.  */
267   /* True if the file is known to exist.  */
270   if (check_extra_portability && ! no_leading_hyphen (file))
280       error (0, 0, _("empty file name"));
286       if (! portable_chars_only (file, filelen))
291       /* Check whether a file name component is in a directory that
293          POSIX does not allow "" as a file name, but some non-POSIX
297       if (lstat (file, &st) == 0)
301           error (0, errno, "%s", file);
316           char const *dir = (*file == '/' ? "/" : ".");
322                      _("%s: unable to determine maximum file name length"),
333           error (0, 0, _("limit %lu exceeded by length %lu of file name %s"),
334                  maxlen, len, quote (file));
340      whether all file name components are so short that they are valid
341      in any file system on this platform.  If CHECK_BASIC_PORTABILITY, though,
347       for (start = file; *(start = component_start (start)); )
363       /* The limit on file name components for the current component.
369       /* If nonzero, the known limit on file name components.  */
372       for (start = file; *(start = component_start (start)); )
381               char const *dir = (start == file ? "." : file);
420                        "of file name component %s"),