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base/SOURCES/Fix-silent-crash-with-dupli...

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From caec174b203206185b6075c0e822c6f45070dd87 Mon Sep 17 00:00:00 2001
From: Alexander Scheel <ascheel@redhat.com>
Date: Wed, 9 Aug 2017 15:00:26 -0400
Subject: [PATCH] Fix silent crash with duplicate config sections
Signed-off-by: Alexander Scheel <ascheel@redhat.com>
Reviewed-by: Simo Sorce <simo@redhat.com>
Resolves: #194
Merges: #202
(cherry picked from commit c0d85387fc38f9554d601ec2ddb111031a694387)
---
proxy/configure.ac | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++
proxy/src/gp_config.c | 27 +++++------
2 files changed, 137 insertions(+), 15 deletions(-)
diff --git a/proxy/configure.ac b/proxy/configure.ac
index c52dbb6..9e01f7d 100644
--- a/proxy/configure.ac
+++ b/proxy/configure.ac
@@ -107,6 +107,131 @@ fi
AC_SUBST(INI_LIBS)
AC_SUBST(INI_CFLAGS)
+AC_CHECK_LIB(ref_array, ref_array_destroy, [],
+ [AC_MSG_WARN([ref_array library must support ref_array_destroy])],
+ [$INI_CONFIG_LIBS])
+
+AC_RUN_IFELSE([AC_LANG_SOURCE([[
+/* See: https://pagure.io/SSSD/ding-libs/pull-request/3172 */
+#include <linux/limits.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <ini_configobj.h>
+#include <ini_config.h>
+
+static int write_to_file(char *path, char *text)
+{
+ FILE *f = fopen(path, "w");
+ int bytes = 0;
+ if (f == NULL)
+ return 1;
+
+ bytes = fprintf(f, "%s", text);
+ if (bytes != strlen(text))
+ return 1;
+
+ return fclose(f);
+}
+
+int main(void)
+{
+ char base_path[PATH_MAX];
+ char augment_path[PATH_MAX];
+
+ char config_base[] =
+ "[section]\n"
+ "key1 = first\n"
+ "key2 = exists\n";
+
+ char config_augment[] =
+ "[section]\n"
+ "key1 = augment\n"
+ "key3 = exists\n";
+
+ char *builddir;
+
+ struct ini_cfgobj *in_cfg, *result_cfg;
+ struct ini_cfgfile *file_ctx;
+
+ uint32_t merge_flags = INI_MS_DETECT | INI_MS_PRESERVE;
+
+ int ret;
+
+ builddir = getenv("builddir");
+ if (builddir == NULL) {
+ builddir = strdup(".");
+ }
+
+ snprintf(base_path, PATH_MAX, "%s/tmp_augment_base.conf", builddir);
+ snprintf(augment_path, PATH_MAX, "%s/tmp_augment_augment.conf", builddir);
+
+ ret = write_to_file(base_path, config_base);
+ if (ret != 0) {
+ ret = 1;
+ goto cleanup;
+ }
+
+ ret = write_to_file(augment_path, config_augment);
+ if (ret != 0) {
+ goto cleanup;
+ }
+
+ /* Match only augment.conf */
+ const char *m_patterns[] = { "^tmp_augment_augment.conf$", NULL };
+
+ /* Match all sections */
+ const char *m_sections[] = { ".*", NULL };
+
+ /* Create config collection */
+ ret = ini_config_create(&in_cfg);
+ if (ret != EOK)
+ goto cleanup;
+
+ /* Open base.conf */
+ ret = ini_config_file_open(base_path, 0, &file_ctx);
+ if (ret != EOK)
+ goto cleanup;
+
+ /* Seed in_cfg with base.conf */
+ ret = ini_config_parse(file_ctx, 1, 0, 0, in_cfg);
+ if (ret != EOK)
+ goto cleanup;
+
+ /* Update base.conf with augment.conf */
+ ret = ini_config_augment(in_cfg,
+ builddir,
+ m_patterns,
+ m_sections,
+ NULL,
+ INI_STOP_ON_NONE,
+ 0,
+ INI_PARSE_NOSPACE|INI_PARSE_NOTAB,
+ merge_flags,
+ &result_cfg,
+ NULL,
+ NULL);
+ /* We always expect EEXIST due to DETECT being set. */
+ if (ret != EEXIST)
+ goto cleanup;
+
+ ret = 0;
+
+cleanup:
+ remove(base_path);
+ remove(augment_path);
+
+ /* Per autoconf guidelines */
+ if (ret != 0)
+ ret = 1;
+
+ return ret;
+}
+]])]
+,, [AC_MSG_ERROR(["ini_config library must support extended INI_MS_DETECT. See: https://pagure.io/SSSD/ding-libs/pull-request/3172"])])
+
AX_PTHREAD(,[AC_MSG_ERROR([Could not find Pthreads support])])
LIBS="$PTHREAD_LIBS $LIBS"
diff --git a/proxy/src/gp_config.c b/proxy/src/gp_config.c
index 07f7c8d..cd057a0 100644
--- a/proxy/src/gp_config.c
+++ b/proxy/src/gp_config.c
@@ -728,7 +728,7 @@ static int gp_config_from_file(const char *config_file,
0, /* metadata_flags, FIXME */
&file_ctx);
if (ret) {
- GPDEBUG("Failed to open config file: %d (%s)\n",
+ GPERROR("Failed to open config file: %d (%s)\n",
ret, gp_strerror(ret));
ini_config_destroy(ini_config);
return ret;
@@ -742,7 +742,7 @@ static int gp_config_from_file(const char *config_file,
if (ret) {
char **errors = NULL;
/* we had a parsing failure */
- GPDEBUG("Failed to parse config file: %d (%s)\n",
+ GPERROR("Failed to parse config file: %d (%s)\n",
ret, gp_strerror(ret));
if (ini_config_error_count(ini_config)) {
ini_config_get_errors(ini_config, &errors);
@@ -791,26 +791,25 @@ static int gp_config_from_dir(const char *config_dir,
INI_STOP_ON_ANY, /* error_level */
collision_flags,
INI_PARSE_NOWRAP,
- /* do not allow colliding sections with the same
- * name in different files */
- INI_MS_ERROR,
+ /* allow sections with the same name in
+ * different files, but log warnings */
+ INI_MS_DETECT | INI_MS_PRESERVE,
&result_cfg,
&error_list,
NULL);
- if (ret) {
+ if (error_list) {
uint32_t len;
-
- if (!error_list) {
- GPAUDIT("Error when reading config directory number: %d\n", ret);
- return ret;
- }
-
len = ref_array_len(error_list);
for (uint32_t i = 0; i < len; i++) {
/* libini has an unfixable bug where error strings are (char **) */
GPAUDIT("Error when reading config directory: %s\n",
*(char **)ref_array_get(error_list, i, NULL));
}
+ ref_array_destroy(error_list);
+ }
+
+ if (ret && ret != EEXIST) {
+ GPERROR("Error when reading config directory number: %d\n", ret);
ref_array_destroy(error_list);
return ret;
@@ -821,9 +820,7 @@ static int gp_config_from_dir(const char *config_dir,
ini_config_destroy(*ini_config);
*ini_config = result_cfg;
}
- if (error_list) {
- ref_array_destroy(error_list);
- }
+
return 0;
}