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/* Copyright (C) 2019 C. McEnroe <june@causal.agency>
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <sqlite3.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sysexits.h>
#define DATABASE_PATH "litterbox/litterbox.sqlite"
static inline sqlite3 *dbOpenPath(char *path, int flags) {
char *base = strrchr(path, '/');
if (flags & SQLITE_OPEN_CREATE && base) {
*base = '\0';
int error = mkdir(path, 0700);
if (error && errno != EEXIST) err(EX_CANTCREAT, "%s", path);
*base = '/';
}
sqlite3 *db;
int error = sqlite3_open_v2(path, &db, flags, NULL);
if (!error) return db;
if (error == SQLITE_CANTOPEN) {
sqlite3_close(db);
return NULL;
}
errx(EX_NOINPUT, "%s: %s", path, sqlite3_errmsg(db));
}
static inline sqlite3 *dbOpen(int flags) {
const char *home = getenv("HOME");
const char *dataHome = getenv("XDG_DATA_HOME");
const char *dataDirs = getenv("XDG_DATA_DIRS");
char path[PATH_MAX];
if (dataHome) {
snprintf(path, sizeof(path), "%s/" DATABASE_PATH, dataHome);
} else {
if (!home) errx(EX_CONFIG, "HOME unset");
snprintf(path, sizeof(path), "%s/.local/share/" DATABASE_PATH, home);
}
sqlite3 *db = dbOpenPath(path, flags);
if (db) return db;
if (!dataDirs) dataDirs = "/usr/local/share:/usr/share";
while (*dataDirs) {
size_t len = strcspn(dataDirs, ":");
snprintf(path, sizeof(path), "%.*s/" DATABASE_PATH, (int)len, dataDirs);
db = dbOpenPath(path, flags);
if (db) return db;
dataDirs += len;
if (*dataDirs) dataDirs++;
}
return NULL;
}
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