summaryrefslogtreecommitdiffstats
path: root/src
diff options
context:
space:
mode:
authorNeels Hofmeyr <neels@hofmeyr.de>2017-10-24 23:26:27 +0200
committerHarald Welte <laforge@gnumonks.org>2017-10-28 16:49:33 +0000
commit7750d2cedc5403cd1d756d1d30a8e08fccd12f74 (patch)
treed6c4036ad34832f2f59746237b2d80e949f860cf /src
parentcd7fa4502cc2e003ae1d6520f7a49fdaef490a3c (diff)
automatically create db tables on osmo-hlr invocation
If a database file is missing, osmo-hlr creates it, as is the default sqlite3 API behavior -- before this patch, that db file is created, but lacks useful tables. Actually also create initial tables in it, as osmo-nitb did. In effect, the 'vty-test' target in tests/Makefile.am no longer needs to create a database manually. (The 'ctrl-test' still does, because it also wants to add subscriber data on top of the bare tables.) Note: it could be desirable to bail if the desired database file does not exist. That is however a different semantic from this patch; this is not changing the fact that a db file is created, this just creates a usable one. Note: I am about to add osmo-hlr-db-tool to do database migration from osmo-nitb. For that, it is desirable to bootstrap a usable database, which is the core reason for this patch. Don't plainly duplicate hlr.sql to .c, but create db_bootstrap.h as a BUILT_SOURCE from reading in sql/hlr.sql and mangling via sed to a list of SQL statement strings. On each db_open(), run this bootstrap sequence. In sql/hlr.sql, these tweaks are necessary: * Add 'IF NOT EXISTS' to 'CREATE TABLE', so that the bootstrap sequence can be run on an already bootstrapped db. * Drop the final comment at the bottom, which ended up being an empty SQL statement and causing sqlite3 API errors, seemed to have no purpose anyway. Note: by composing the statement strings as multiline and including the SQL comments, sqlite3 actually retains the comments contained in table definitions and prints them back during 'sqlite3 hlr.db .dump'. Change-Id: If77dbbfe1af3e66aaec91cb6295b687f37678636
Diffstat (limited to 'src')
-rw-r--r--src/Makefile.am18
-rw-r--r--src/db.c32
-rw-r--r--src/db_bootstrap.sed25
3 files changed, 75 insertions, 0 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index fc7c653..3b09b7b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -10,8 +10,14 @@ AM_CFLAGS = \
EXTRA_DIST = \
populate_hlr_db.pl \
+ db_bootstrap.sed \
$(NULL)
+BUILT_SOURCES = \
+ db_bootstrap.h \
+ $(NULL)
+CLEANFILES = $(BUILT_SOURCES)
+
noinst_HEADERS = \
auc.h \
db.h \
@@ -24,6 +30,7 @@ noinst_HEADERS = \
ctrl.h \
hlr_vty.h \
hlr_vty_subscr.h \
+ db_bootstrap.h \
$(NULL)
bin_PROGRAMS = \
@@ -73,3 +80,14 @@ db_test_LDADD = \
$(LIBOSMOGSM_LIBS) \
$(SQLITE3_LIBS) \
$(NULL)
+
+BOOTSTRAP_SQL = $(top_srcdir)/sql/hlr.sql
+
+db_bootstrap.h: $(BOOTSTRAP_SQL) $(srcdir)/db_bootstrap.sed
+ echo "/* DO NOT EDIT THIS FILE. It is generated from osmo-hlr.git/sql/hlr.sql */" > "$@"
+ echo "#pragma once" >> "$@"
+ echo "static const char *stmt_bootstrap_sql[] = {" >> "$@"
+ cat "$(BOOTSTRAP_SQL)" \
+ | sed -f "$(srcdir)/db_bootstrap.sed" \
+ >> "$@"
+ echo "};" >> "$@"
diff --git a/src/db.c b/src/db.c
index fbf5c76..8733cf5 100644
--- a/src/db.c
+++ b/src/db.c
@@ -25,6 +25,7 @@
#include "logging.h"
#include "db.h"
+#include "db_bootstrap.h"
#define SEL_COLUMNS \
"id," \
@@ -179,6 +180,35 @@ void db_close(struct db_context *dbc)
talloc_free(dbc);
}
+static int db_bootstrap(struct db_context *dbc)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(stmt_bootstrap_sql); i++) {
+ int rc;
+ sqlite3_stmt *stmt;
+
+ rc = sqlite3_prepare_v2(dbc->db, stmt_bootstrap_sql[i], -1,
+ &stmt, NULL);
+ if (rc != SQLITE_OK) {
+ LOGP(DDB, LOGL_ERROR, "Unable to prepare SQL statement '%s'\n",
+ stmt_bootstrap_sql[i]);
+ return -1;
+ }
+
+ /* execute the statement */
+ rc = sqlite3_step(stmt);
+ db_remove_reset(stmt);
+ if (rc != SQLITE_DONE) {
+ LOGP(DDB, LOGL_ERROR, "Cannot bootstrap database: SQL error: (%d) %s,"
+ " during stmt '%s'",
+ rc, sqlite3_errmsg(dbc->db),
+ stmt_bootstrap_sql[i]);
+ return -1;
+ }
+ }
+ return 0;
+}
+
struct db_context *db_open(void *ctx, const char *fname)
{
struct db_context *dbc = talloc_zero(ctx, struct db_context);
@@ -231,6 +261,8 @@ struct db_context *db_open(void *ctx, const char *fname)
LOGP(DDB, LOGL_ERROR, "Unable to set Write-Ahead Logging: %s\n",
err_msg);
+ db_bootstrap(dbc);
+
/* prepare all SQL statements */
for (i = 0; i < ARRAY_SIZE(dbc->stmt); i++) {
rc = sqlite3_prepare_v2(dbc->db, stmt_sql[i], -1,
diff --git a/src/db_bootstrap.sed b/src/db_bootstrap.sed
new file mode 100644
index 0000000..60b8243
--- /dev/null
+++ b/src/db_bootstrap.sed
@@ -0,0 +1,25 @@
+# Input to this is sql/hlr.sql.
+#
+# We want each SQL statement line wrapped in "...\n", and each end (";") to
+# become a comma:
+#
+# SOME SQL COMMAND (
+# that may span )
+# MULTIPLE LINES;
+# MORE;
+#
+# -->
+#
+# "SOME SQL COMMAND (\n"
+# " that may span )\n"
+# "MULTIPLE LINES\n", <--note the comma here
+# "MORE\n",
+#
+# just replacing ';' with '\n,' won't work, since sed is bad in printing
+# multiple lines. Also, how to input newlines to sed is not portable across
+# platforms.
+
+# Match excluding a trailing ';' as \1, keep any trailing ';' in \2
+s/^\(.*[^;]\)\(;\|\)$/"\1\\n"\2/
+# Replace trailing ';' as ','
+s/;$/,/