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/**
* part of Hydrilla
* Program entry point.
*
* Copyright (C) 2021 Wojtek Kosior
* Redistribution terms are gathered in the `copyright' file.
*/
#define _POSIX_C_SOURCE 200809L /* S_IFMT, S_IFDIR */
#include <dirent.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <cjson/cJSON.h>
#include "string_buf.h"
#include "hashtable.h"
#include "scriptbase.h"
#define PRESERVE_ERRNO(call) \
do { \
int VERY_UNLIKELY_TO_COLLIDE_NAME_$$$$$$$$##__LINE__ = errno; \
call; \
errno = VERY_UNLIKELY_TO_COLLIDE_NAME_$$$$$$$$##__LINE__; \
} while (0)
static const char default_search_path[] = "/var/lib/hydrilla/content/";
static int process_scriptbase_subdir(struct scriptbase *base,
struct dirent *subdir,
struct stringbuf *path_buf,
struct stringbuf *json_buf)
{
struct stat statbuf;
cJSON *index_json;
int retval = -1;
size_t initial_len = path_buf->buf_filled, len_dirname;
if (sb_string(path_buf, subdir->d_name))
return -1;
len_dirname = path_buf->buf_filled;
if (stat(path_buf->buf, &statbuf))
return -1;
if ((statbuf.st_mode & S_IFMT) != S_IFDIR)
return 0;
if (sb_string(path_buf, "/index.json"))
return -1;
printf("Reading %s\n", path_buf->buf);
stringbuf_truncate(json_buf, 0);
if (sb_filepath(json_buf, path_buf->buf))
return -1;
index_json = cJSON_Parse(json_buf->buf);
if (!index_json) {
fprintf(stderr, "Failed to parse json.\n");
return -1;
}
stringbuf_truncate(path_buf, len_dirname);
retval = catalogue_component(path_buf->buf + initial_len,
index_json, base);
PRESERVE_ERRNO(cJSON_Delete(index_json));
return retval;
}
static int prepare_scriptbase_from_dir(const char *dir_path,
struct scriptbase *base)
{
DIR *maindir = NULL;
struct dirent *subdir;
struct stringbuf path_buf;
struct stringbuf json_buf;
size_t base_path_len;
int retval = -1;
printf("Searching %s\n", dir_path);
stringbuf_init(&path_buf);
stringbuf_init(&json_buf);
if (scriptbase_init(base, "https://hydrilla.koszko.org/resources"))
goto end;
maindir = opendir(dir_path);
if (!maindir)
goto end;
if (sb_sprintf(&path_buf, "%s/", dir_path))
goto end;
base_path_len = path_buf.buf_filled;
while (true) {
errno = 0;
subdir = readdir(maindir);
if (!subdir) {
if (!errno)
retval = 0;
break;
}
if (!strcmp(subdir->d_name, "..") ||
!strcmp(subdir->d_name, "."))
continue;
stringbuf_truncate(&path_buf, base_path_len);
errno = 0;
if (process_scriptbase_subdir(base, subdir,
&path_buf, &json_buf)) {
fprintf(stderr, "Error processing subdirectory %s%s",
subdir->d_name, errno ? ": " : ".\n");
if (errno)
perror(NULL);
}
}
end:
if (errno)
perror(NULL);
stringbuf_destroy(&path_buf);
stringbuf_destroy(&json_buf);
if (maindir)
closedir(maindir);
if (retval)
scriptbase_destroy(base);
printf("Search in %s %s.\n", dir_path, retval ? "failed" : "finished");
return retval;
}
static void print_component_name(const void *key, void *val, void *arg)
{
char type = (char) (size_t) arg;
bool unfilled;
unfilled =
(type == 's' && !((struct script*) val)->filled) ||
(type == 'b' && !((struct bag*) val)->filled);
printf("%s%s\n", (const char*) key,
unfilled ? " (referenced only)" : "");
}
int serve_scriptbase(struct scriptbase *base, bool);
int main(int argc, char *argv[])
{
struct scriptbase base;
const char *search_path = default_search_path;
if (argc > 1)
search_path = argv[1];
if (prepare_scriptbase_from_dir(search_path, &base))
return -1;
puts("## LOADED SCRIPTS:");
ht_map(&base.scripts, (void*) 's', print_component_name);
puts("## LOADED BAGS:");
ht_map(&base.bags, (void*) 'b', print_component_name);
puts("## LOADED PAGES:");
ht_map(&base.pages, (void*) 'p', print_component_name);
if (serve_scriptbase(&base, !!getenv("HYDRILLA_WAIT_SIGTERM")))
fprintf(stderr, "Error serving scriptbase.\n");
scriptbase_destroy(&base);
return 0;
}
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