/*
* Create option parser for program named [prog]
*/
optparse_t optparse_create (const char *prog)
{
struct optparse_option help = {
.name = "help",
.key = 'h',
.usage = "Display this message.",
.cb = (optparse_cb_f) display_help,
};
struct opt_parser *p = malloc (sizeof (*p));
if (!p)
return NULL;
if (!(p->program_name = strdup (prog))) {
free (p);
return NULL;
}
p->usage = NULL;
p->option_list = list_create ((ListDelF) option_info_destroy);
if (!p->option_list) {
free (p);
return NULL;
}
p->log_fn = &log_stderr;
p->fatalerr_fn = &log_stderr_exit;
p->fatalerr_handle = NULL;
p->left_margin = 2;
p->option_width = 25;
/*
* Register -h, --help
*/
help.arg = (void *) p;
if (optparse_add_option (p, &help) != OPTPARSE_SUCCESS) {
fprintf (stderr, "failed to register --help option: %s\n", strerror (errno));
optparse_destroy (p);
return (NULL);
}
return (p);
}
/*
* Search for option with [name] in parser [p] returns -1 if option
* was never registered with this parser, 0 if option was not used,
* and 1 if option was specified in args. Returns pointer to optargp
* if non-NULL.
*/
int optparse_getopt (optparse_t p, const char *name, const char **optargp)
{
struct option_info *c;
if (!(c = find_option_info (p, name)))
return (-1);
if (c->found) {
if (optargp)
*optargp = c->optarg;
return (1);
}
return (0);
}
bool optparse_hasopt (optparse_t p, const char *name)
{
int n;
if ((n = optparse_getopt (p, name, NULL)) < 0) {
(*p->fatalerr_fn) (p->fatalerr_handle, 1,
"%s: optparse error: no such argument '%s'\n",
p->program_name, name);
return false;
}
return (n > 0);
}
static optparse_t * setup_optparse_parse_args (int argc, char *argv[])
{
optparse_err_t e;
struct optparse_option helpopt = {
.name = "help", .key = 'h', .usage = "Display this message"
};
optparse_t *p = optparse_create ("flux");
if (p == NULL)
log_err_exit ("optparse_create");
optparse_set (p, OPTPARSE_USAGE, "[OPTIONS] COMMAND ARGS");
e = optparse_add_option_table (p, opts);
if (e != OPTPARSE_SUCCESS)
log_msg_exit ("optparse_add_option_table() failed");
// Remove automatic `--help' in favor of our own usage() from above
e = optparse_remove_option (p, "help");
if (e != OPTPARSE_SUCCESS)
log_msg_exit ("optparse_remove_option (\"help\")");
e = optparse_add_option (p, &helpopt);
if (e != OPTPARSE_SUCCESS)
log_msg_exit ("optparse_add_option (\"help\")");
// Don't print internal subcommands in --help (we print subcommands using
// emit_command_help() above.
e = optparse_set (p, OPTPARSE_PRINT_SUBCMDS, 0);
if (e != OPTPARSE_SUCCESS)
log_msg_exit ("optparse_set (OPTPARSE_PRINT_SUBCMDS");
register_builtin_subcommands (p);
if (optparse_parse_args (p, argc, argv) < 0)
exit (1);
return (p);
}
int main (int argc, char *argv[])
{
bool vopt = false;
struct environment *env;
optparse_t *p;
const char *searchpath;
const char *argv0 = argv[0];
int flags = 0;
log_init ("flux");
p = setup_optparse_parse_args (argc, argv);
if (!flux_is_installed ())
flags |= CONF_FLAG_INTREE;
optparse_set_data (p, "conf_flags", &flags);
if (optparse_hasopt (p, "help")) {
usage (p); // N.B. accesses "conf_flags"
exit (0);
}
optind = optparse_optind (p);
if (argc - optind == 0) {
usage (p);
exit (1);
}
vopt = optparse_hasopt (p, "verbose");
/* prepare the environment 'env' that will be passed to subcommands.
*/
env = environment_create ();
/* Add PATH to env and prepend path to this executable if necessary.
*/
setup_path (env, argv0);
/* Prepend config values to env values.
* Note special handling of lua ;; (default path).
*/
environment_from_env (env, "LUA_CPATH", "", ';');
environment_no_dedup_push_back (env, "LUA_CPATH", ";;");
environment_push (env, "LUA_CPATH", flux_conf_get ("lua_cpath_add", flags));
environment_push (env, "LUA_CPATH", getenv ("FLUX_LUA_CPATH_PREPEND"));
environment_from_env (env, "LUA_PATH", "", ';');
environment_no_dedup_push_back (env, "LUA_PATH", ";;");
environment_push (env, "LUA_PATH", flux_conf_get ("lua_path_add", flags));
environment_push (env, "LUA_PATH", getenv ("FLUX_LUA_PATH_PREPEND"));
environment_from_env (env, "PYTHONPATH", "", ':');
environment_push (env, "PYTHONPATH", flux_conf_get ("python_path", flags));
environment_push (env, "PYTHONPATH", getenv ("FLUX_PYTHONPATH_PREPEND"));
environment_from_env (env, "MANPATH", "", ':');
environment_push (env, "MANPATH", flux_conf_get ("man_path", flags));
environment_from_env (env, "FLUX_EXEC_PATH", "", ':');
environment_push (env, "FLUX_EXEC_PATH",
flux_conf_get ("exec_path", flags));
environment_push (env, "FLUX_EXEC_PATH", getenv ("FLUX_EXEC_PATH_PREPEND"));
environment_from_env (env, "FLUX_CONNECTOR_PATH", "", ':');
environment_push (env, "FLUX_CONNECTOR_PATH",
flux_conf_get ("connector_path", flags));
environment_push (env, "FLUX_CONNECTOR_PATH",
getenv ("FLUX_CONNECTOR_PATH_PREPEND"));
environment_from_env (env, "FLUX_MODULE_PATH", "", ':');
environment_push (env, "FLUX_MODULE_PATH",
flux_conf_get ("module_path", flags));
environment_push (env, "FLUX_MODULE_PATH",
getenv ("FLUX_MODULE_PATH_PREPEND"));
/* Set FLUX_SEC_DIRECTORY, possibly to $HOME/.flux.
*/
setup_keydir (env, flags);
if (getenv ("FLUX_URI"))
environment_from_env (env, "FLUX_URI", "", 0); /* pass-thru */
environment_from_env (env, "FLUX_RC1_PATH",
flux_conf_get ("rc1_path", flags), 0);
environment_from_env (env, "FLUX_RC3_PATH",
flux_conf_get ("rc3_path", flags), 0);
environment_from_env (env, "FLUX_PMI_LIBRARY_PATH",
flux_conf_get ("pmi_library_path", flags), 0);
environment_from_env (env, "FLUX_WRECK_LUA_PATTERN",
flux_conf_get ("wreck_lua_pattern", flags), 0);
environment_from_env (env, "FLUX_WREXECD_PATH",
flux_conf_get ("wrexecd_path", flags), 0);
environment_apply(env);
optparse_set_data (p, "env", env);
if (vopt)
print_environment (env);
if (optparse_get_subcommand (p, argv [optind])) {
if (optparse_run_subcommand (p, argc, argv) < 0)
exit (1);
} else {
searchpath = environment_get (env, "FLUX_EXEC_PATH");
if (vopt)
printf ("sub-command search path: %s\n", searchpath);
exec_subcommand (searchpath, vopt, argv + optind);
}
environment_destroy (env);
optparse_destroy (p);
log_fini ();
return 0;
}
