Function mkdirs

zic.c:4260–4315

Ensure that the directories of ARGNAME exist, by making any missing ones. If ANCESTORS, do this only for ARGNAME's ancestors; otherwise, do it for ARGNAME too. Exit with failure if there is trouble. Do not consider an existing file to be trouble. */

      break;
    }
    i += clen + 1;
  }
  if (TZ_MAX_CHARS < nchs + nchs_incr) {
    error(N_("too many, or too long, time zone abbreviations"));
    exit(EXIT_FAILURE);
  }
  memmove(&chs[i + nchs_incr], &chs[i], nchs - i);
  memcpy(&chs[i], abbr, nchs_incr);
  *pnchs = nchs + nchs_incr;
  return i;
}

/* Ensure that the directories of ARGNAME exist, by making any missing
   ones.  If ANCESTORS, do this only for ARGNAME's ancestors; otherwise,
   do it for ARGNAME too.  Exit with failure if there is trouble.
   Do not consider an existing file to be trouble.  */
static void
mkdirs(char const *argname, bool ancestors)
{
    /* If -D was specified, do not create directories.
       If a file operation's parent directory is missing,
       the operation will fail and be diagnosed.  */
    if (!skip_mkdir) {

	char *name = xstrdup(argname);
	char *cp = name;

	/* On MS-Windows systems, do not worry about drive letters or
	   backslashes, as this should suffice in practice.  Time zone
	   names do not use drive letters and backslashes.  If the -d
	   option of zic does not name an already-existing directory,
	   it can use slashes to separate the already-existing
	   ancestor prefix from the to-be-created subdirectories.  */

	/* Do not mkdir a root directory, as it must exist.  */
	while (*cp == '/')
	  cp++;

	while (cp && ((cp = strchr(cp, '/')) || !ancestors)) {
		if (cp)
		  *cp = '\0';
		/*
		** Try to create it.  It's OK if creation fails because
		** the directory already exists, perhaps because some
		** other process just created it.  For simplicity do
		** not check first whether it already exists, as that
		** is checked anyway if the mkdir fails.
		*/
		if (mkdir(name, MKDIR_PERMS) < 0) {
			/* Do not report an error if err == EEXIST, because
			   some other process might have made the directory
			   in the meantime.  Likewise for ENOSYS, because
			   Solaris 10 mkdir fails with ENOSYS if the
			   directory is an automounted mount point.
			   Likewise for EACCES, since mkdir can fail
			   with EACCES merely because the parent directory
			   is unwritable.  Likewise for most other error
			   numbers.  */