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pkgindb.c
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pkgindb.c
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/*
* Copyright (c) 2009-2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emile "iMil" Heitor <[email protected]> .
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sqlite3.h>
#include "pkgin.h"
#define H_BUF 6
static sqlite3 *pdb;
static int repo_counter = 0;
static const char *pragmaopts[] = {
"locking_mode = EXCLUSIVE",
"empty_result_callbacks = 1",
"synchronous = EXTRA",
NULL
};
/*
* Used to keep track of the current query so that it can be used in the
* error log callback for diagnostics.
*
* Most database access goes through pkgindb_doquery which will set curquery
* to the query it has been passed, and then resets it to NULL afterwards.
* Any callers that perform their own database access should use curquery to
* store their query so that errors are logged correctly.
*/
static const char *curquery = NULL;
char *pkgin_dbdir;
char *pkgin_sqldb;
char *pkgin_cache;
char *pkgin_errlog;
char *pkgin_sqllog;
void
setup_pkgin_dbdir(void)
{
char *p;
if ((p = getenv("PKGIN_DBDIR")) != NULL)
pkgin_dbdir = xasprintf("%s", p);
else
pkgin_dbdir = xasprintf("%s", PKGIN_DBDIR);
pkgin_sqldb = xasprintf("%s/pkgin.db", pkgin_dbdir);
pkgin_cache = xasprintf("%s/cache", pkgin_dbdir);
pkgin_errlog = xasprintf("%s/pkg_install-err.log", pkgin_dbdir);
pkgin_sqllog = xasprintf("%s/sql.log", pkgin_dbdir);
if (access(pkgin_dbdir, F_OK) != 0) {
if (mkdir(pkgin_dbdir, 0755) < 0)
err(1, "Failed to create %s", pkgin_dbdir);
}
if (access(pkgin_cache, F_OK) != 0) {
if (mkdir(pkgin_cache, 0755) < 0)
err(1, "Failed to create %s", pkgin_cache);
}
}
uint8_t
have_privs(int reqd)
{
if ((reqd & PRIVS_PKGDB) &&
(access(pkgdb_get_dir(), F_OK) == 0) &&
(access(pkgdb_get_dir(), W_OK) < 0))
return 0;
if ((reqd & PRIVS_PKGINDB) &&
(access(pkgin_dbdir, F_OK) == 0) &&
(access(pkgin_dbdir, W_OK) < 0))
return 0;
return 1;
}
const char *
pdb_version(void)
{
return "SQLite "SQLITE_VERSION;
}
/*
* unused: optional parameter given as 4th argument of sqlite3_exec
* argc : row number
* argv : row
* col : column
*
* col[0] col[1] col[argc]
* ______________________________________
* | argv[0] | argv[1] | ... | argv[argc] |
*
* WARNING: callback is called on every line
*/
/* sqlite callback, record a single value */
int
pdb_get_value(void *param, int argc, char **argv, char **colname)
{
char *value = (char *)param;
if (argv != NULL) {
XSTRCPY(value, argv[0]);
return PDB_OK;
}
return PDB_ERR;
}
/*
* Record an error to the SQL log, optionally logging the query that caused
* the failure. Any errors opening the log for writing are ignored so that
* regular users can issue queries.
*/
static void
pkgindb_sqlerr_cb(void *arg, int errcode, const char *errmsg)
{
FILE *fp;
struct tm tm;
time_t now;
char curtime[64];
char **query = (char **)arg;
now = time(NULL);
tm = *(localtime(&now));
strftime(curtime, sizeof(curtime), "%Y-%m-%d %H:%M:%S %Z", &tm);
if ((fp = fopen(pkgin_sqllog, "a")) != NULL) {
fprintf(fp, "SQL error at %s\n", curtime);
fprintf(fp, " errmsg: %s\n", errmsg);
if (*query)
fprintf(fp, " query: %s\n", *query);
fclose(fp);
}
}
int
pkgindb_doquery(const char *query, int (*cb)(void *, int, char *[], char *[]),
void *param)
{
int rv;
/*
* Save the current query for the error logging callback, then reset
* to NULL after the query has completed to avoid leaking into the
* error log of callers that use the sqlite3_exec interface directly.
*/
curquery = query;
rv = sqlite3_exec(pdb, query, cb, param, NULL);
curquery = NULL;
return (rv == SQLITE_OK) ? PDB_OK : PDB_ERR;
}
int
pkgindb_dovaquery(const char *fmt, ...)
{
char *buf;
va_list ap;
int rv;
va_start(ap, fmt);
if (vasprintf(&buf, fmt, ap) == -1)
errx(EXIT_FAILURE, "Insufficient memory to construct query");
va_end(ap);
rv = pkgindb_doquery(buf, NULL, NULL);
free(buf);
return rv;
}
/*
* Configure the pkgin database. Returns 0 if opening an existing compatible
* database, or 1 if the database needs to be created or recreated (in the case
* of a schema upgrade). Any other error is fatal.
*/
int
pkgindb_open(void)
{
int create, i, oflags;
char buf[128];
/*
* Configure our sqlite error log callback function.
*/
sqlite3_config(SQLITE_CONFIG_LOG, pkgindb_sqlerr_cb, &curquery);
/*
* Determine if we need to create a new database or can load an
* existing one. The SQLITE_OPEN_READWRITE flag does not require that
* write privileges are available, if they are not then the database
* will be opened read-only, allowing normal users to perform queries.
*/
recreate:
create = 0;
oflags = SQLITE_OPEN_READWRITE;
if (access(pkgin_sqldb, F_OK) < 0) {
create = 1;
oflags |= SQLITE_OPEN_CREATE;
}
if (sqlite3_open_v2(pkgin_sqldb, &pdb, oflags, NULL) != SQLITE_OK)
err(EXIT_FAILURE, "cannot open database");
/*
* If we're creating or recreating a new database, attempt to populate
* the initial schema, otherwise perform a compatibility check. If the
* compatibility check fails then we simply remove the existing database
* and recreate, there is no support for online upgrades at this time.
*/
if (create) {
if (pkgindb_doquery(CREATE_DRYDB, NULL, NULL) != PDB_OK)
errx(EXIT_FAILURE, "cannot create database: %s",
sqlite3_errmsg(pdb));
} else {
/*
* This query checks the compatibility of the current database,
* and should be one that either completes or fails due to an
* SQL error based on the most recent schema change. Returned
* rows are ignored, so choose a query that runs quickly.
*/
if (pkgindb_doquery("SELECT BUILD_DATE FROM LOCAL_PKG LIMIT 1;",
NULL, NULL) != PDB_OK) {
if (unlink(pkgin_sqldb) < 0)
err(EXIT_FAILURE, "cannot recreate database");
goto recreate;
}
}
/* Apply PRAGMA properties */
for (i = 0; pragmaopts[i] != NULL; i++) {
snprintf(buf, sizeof(buf), "PRAGMA %s;", pragmaopts[i]);
pkgindb_doquery(buf, NULL, NULL);
}
return create;
}
void
pkgindb_close(void)
{
sqlite3_close(pdb);
}
__attribute__((noreturn))
static void
pkgindb_sqlfail(void)
{
pkgindb_close();
errx(EXIT_FAILURE, "SQL query failed, see %s", pkgin_sqllog);
}
int
pkg_db_mtime(void)
{
sqlite3_stmt *stmt;
struct stat st;
time_t db_mtime;
long db_ntime;
int rc;
/* No pkgdb, just return up-to-date so we can start installing. */
if (stat(pkgdb_get_dir(), &st) < 0)
return 0;
/*
* Fetch only the most recent rowid.
*/
curquery = "SELECT PKGDB_MTIME, PKGDB_NTIME FROM PKGDB "
"ORDER BY ROWID DESC LIMIT 1;";
if (sqlite3_prepare_v2(pdb, curquery, -1, &stmt, NULL) != SQLITE_OK)
pkgindb_sqlfail();
rc = sqlite3_step(stmt);
if (rc == SQLITE_ROW) {
db_mtime = sqlite3_column_int64(stmt, 0);
db_ntime = (long)sqlite3_column_int64(stmt, 1);
} else if (rc == SQLITE_DONE) {
db_mtime = 0;
db_ntime = 0;
} else {
/* This shouldn't happen, abort and investigate */
pkgindb_sqlfail();
}
sqlite3_finalize(stmt);
/* Databases matched pkgdb, we're up-to-date */
if (db_mtime == st.st_mtime && db_ntime == st.pkgin_nanotime)
return 0;
/*
* Update database to current mtime and request a refresh.
*/
curquery = "INSERT INTO PKGDB (PKGDB_MTIME, PKGDB_NTIME) "
"VALUES (?, ?);";
if (sqlite3_prepare_v2(pdb, curquery, -1, &stmt, NULL) != SQLITE_OK)
pkgindb_sqlfail();
if (sqlite3_bind_int64(stmt, 1, st.st_mtime) != SQLITE_OK)
pkgindb_sqlfail();
if (sqlite3_bind_int64(stmt, 2, st.pkgin_nanotime) != SQLITE_OK)
pkgindb_sqlfail();
if (sqlite3_step(stmt) != SQLITE_DONE)
pkgindb_sqlfail();
sqlite3_finalize(stmt);
return 1;
}
void
repo_record(char **repos)
{
int i;
char query[BUFSIZ], value[20];
for (i = 0; repos[i] != NULL; i++) {
snprintf(query, BUFSIZ, EXISTS_REPO, repos[i]);
pkgindb_doquery(query, pdb_get_value, &value[0]);
repo_counter++;
if (value[0] == '0') {
/* repository does not exists */
snprintf(query, BUFSIZ, INSERT_REPO, repos[i]);
pkgindb_doquery(query, NULL, NULL);
}
}
}
time_t
pkg_sum_mtime(char *repo)
{
time_t db_mtime = 0;
char str_mtime[20], query[BUFSIZ];
str_mtime[0] = '\0';
snprintf(query, BUFSIZ,
"SELECT REPO_MTIME FROM REPOS WHERE REPO_URL GLOB \'%s*\';",
repo);
pkgindb_doquery(query, pdb_get_value, str_mtime);
if (str_mtime[0] != '\0')
db_mtime = (time_t)strtol(str_mtime, (char **)NULL, 10);
return db_mtime;
}
void
pkgindb_stats(void)
{
sqlite3_stmt *stmt;
int lcount, rcount;
char lsize[H_BUF], rsize[H_BUF];
curquery = "SELECT "
" (SELECT COUNT(PKG_ID) FROM LOCAL_PKG) AS lcount, "
" (SELECT SUM(SIZE_PKG) FROM LOCAL_PKG) AS lsize, "
" (SELECT COUNT(PKG_ID) FROM REMOTE_PKG) AS rcount, "
" (SELECT SUM(FILE_SIZE) FROM REMOTE_PKG) AS rsize;";
if (sqlite3_prepare_v2(pdb, curquery, -1, &stmt, NULL) != SQLITE_OK)
pkgindb_sqlfail();
/* Anything other than a single row is an error */
if (sqlite3_step(stmt) != SQLITE_ROW)
pkgindb_sqlfail();
/*
* Counts are simple integers. Sizes are converted to human readable
* format.
*/
lcount = sqlite3_column_int(stmt, 0);
humanize_number(lsize, H_BUF, sqlite3_column_int64(stmt, 1), "",
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
rcount = sqlite3_column_int(stmt, 2);
humanize_number(rsize, H_BUF, sqlite3_column_int64(stmt, 3), "",
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
sqlite3_finalize(stmt);
printf("Local package database:\n"
"\tInstalled packages: %d\n"
"\tDisk space occupied: %s\n\n"
"Remote package database(s):\n"
"\tNumber of repositories: %d\n"
"\tPackages available: %d\n"
"\tTotal size of packages: %s\n",
lcount, lsize, repo_counter, rcount, rsize);
}