/* notmuch - Not much of an email program, (just index and search)
 *
 * This file is part of notmuch.
 *
 * Copyright © 2011 Jani Nikula
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/ .
 *
 * Author: Jani Nikula <jani@nikula.org>
 */

#include "notmuch-client.h"

int
notmuch_run_hook (const char *db_path, const char *hook)
{
    char *hook_path;
    int status = 0;

    if (asprintf (&hook_path, "%s/%s/%s/%s", db_path, ".notmuch", "hooks",
		  hook) == -1)
	return NOTMUCH_STATUS_OUT_OF_MEMORY;

    if (access (hook_path, X_OK) == -1) {
	/* Ignore ENOENT. It's okay not to have a hook, hook dir, or even
	 * notmuch dir. Dangling symbolic links also result in ENOENT, but
	 * we'll ignore that too for simplicity. */
	if (errno != ENOENT) {
	    fprintf (stderr, "Error: %s hook access failed: %s\n", hook,
		     strerror (errno));
	    status = NOTMUCH_STATUS_FILE_ERROR;
	}
	goto DONE;
    }

    status = system (hook_path);
    if (status) {
	if (WIFSIGNALED(status))
	    fprintf(stderr, "Error: %s hook terminated with signal %d\n", hook,
		    WTERMSIG(status));
	else
	    fprintf(stderr, "Error: %s hook failed with status %d\n", hook,
		    WEXITSTATUS(status));

	status = NOTMUCH_STATUS_FILE_ERROR; /* Close enough */
    }

  DONE:
    free (hook_path);

    return status;
}