Introduce abrt-addon-python3 package
Signed-off-by: Matej Habrnal <mhabrnal@redhat.com>
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287
0106-lib-add-functions-validating-dump-dir.patch
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287
0106-lib-add-functions-validating-dump-dir.patch
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From b7f8bd20b7fb5b72f003ae3fa647c1d75f4218b7 Mon Sep 17 00:00:00 2001
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From: Jakub Filak <jfilak@redhat.com>
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Date: Thu, 23 Apr 2015 14:40:18 +0200
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Subject: [ABRT PATCH] lib: add functions validating dump dir
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Move the code from abrt-server to shared library and fix the condition
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validating dump dir's path.
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As of now, abrt is allowed to process only direct sub-directories of the
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dump locations.
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Signed-off-by: Jakub Filak <jfilak@redhat.com>
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---
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src/daemon/abrt-server.c | 42 ++++++------------------
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src/include/libabrt.h | 4 +++
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src/lib/hooklib.c | 56 +++++++++++++++++++++++++++++++
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tests/Makefile.am | 3 +-
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tests/hooklib.at | 85 ++++++++++++++++++++++++++++++++++++++++++++++++
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tests/testsuite.at | 1 +
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6 files changed, 158 insertions(+), 33 deletions(-)
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create mode 100644 tests/hooklib.at
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diff --git a/src/daemon/abrt-server.c b/src/daemon/abrt-server.c
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index 4d486d4..1030461 100644
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--- a/src/daemon/abrt-server.c
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+++ b/src/daemon/abrt-server.c
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@@ -76,20 +76,6 @@ static unsigned total_bytes_read = 0;
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static uid_t client_uid = (uid_t)-1L;
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-static bool dir_is_in_dump_location(const char *dump_dir_name)
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-{
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- unsigned len = strlen(g_settings_dump_location);
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-
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- if (strncmp(dump_dir_name, g_settings_dump_location, len) == 0
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- && dump_dir_name[len] == '/'
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- /* must not contain "/." anywhere (IOW: disallow ".." component) */
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- && !strstr(dump_dir_name + len, "/.")
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- ) {
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- return 1;
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- }
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- return 0;
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-}
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-
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/* Remove dump dir */
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static int delete_path(const char *dump_dir_name)
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{
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@@ -100,6 +86,11 @@ static int delete_path(const char *dump_dir_name)
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error_msg("Bad problem directory name '%s', should start with: '%s'", dump_dir_name, g_settings_dump_location);
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return 400; /* Bad Request */
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}
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+ if (!dir_has_correct_permissions(dump_dir_name))
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+ {
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+ error_msg("Problem directory '%s' isn't owned by root:abrt or others are not restricted from access", dump_dir_name);
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+ return 400; /* */
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+ }
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if (!dump_dir_accessible_by_uid(dump_dir_name, client_uid))
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{
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if (errno == ENOTDIR)
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@@ -154,26 +145,13 @@ static int run_post_create(const char *dirname)
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error_msg("Bad problem directory name '%s', should start with: '%s'", dirname, g_settings_dump_location);
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return 400; /* Bad Request */
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}
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+ if (!dir_has_correct_permissions(dirname))
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+ {
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+ error_msg("Problem directory '%s' isn't owned by root:abrt or others are not restricted from access", dirname);
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+ return 400; /* */
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+ }
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if (g_settings_privatereports)
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{
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- struct stat statbuf;
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- if (lstat(dirname, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode))
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- {
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- error_msg("Path '%s' isn't directory", dirname);
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- return 404; /* Not Found */
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- }
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- /* Get ABRT's group gid */
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- struct group *gr = getgrnam("abrt");
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- if (!gr)
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- {
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- error_msg("Group 'abrt' does not exist");
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- return 500;
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- }
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- if (statbuf.st_uid != 0 || !(statbuf.st_gid == 0 || statbuf.st_gid == gr->gr_gid) || statbuf.st_mode & 07)
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- {
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- error_msg("Problem directory '%s' isn't owned by root:abrt or others are not restricted from access", dirname);
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- return 403;
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- }
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struct dump_dir *dd = dd_opendir(dirname, DD_OPEN_READONLY);
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const bool complete = dd && problem_dump_dir_is_complete(dd);
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dd_close(dd);
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diff --git a/src/include/libabrt.h b/src/include/libabrt.h
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index 0320c5b..5bf2397 100644
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--- a/src/include/libabrt.h
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+++ b/src/include/libabrt.h
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@@ -47,6 +47,10 @@ char *run_unstrip_n(const char *dump_dir_name, unsigned timeout_sec);
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#define get_backtrace abrt_get_backtrace
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char *get_backtrace(const char *dump_dir_name, unsigned timeout_sec, const char *debuginfo_dirs);
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+#define dir_is_in_dump_location abrt_dir_is_in_dump_location
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+bool dir_is_in_dump_location(const char *dir_name);
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+#define dir_has_correct_permissions abrt_dir_has_correct_permissions
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+bool dir_has_correct_permissions(const char *dir_name);
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#define g_settings_nMaxCrashReportsSize abrt_g_settings_nMaxCrashReportsSize
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extern unsigned int g_settings_nMaxCrashReportsSize;
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diff --git a/src/lib/hooklib.c b/src/lib/hooklib.c
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index fb7750d..4b20025 100644
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--- a/src/lib/hooklib.c
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+++ b/src/lib/hooklib.c
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@@ -427,3 +427,59 @@ char* problem_data_save(problem_data_t *pd)
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log_info("problem id: '%s'", problem_id);
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return problem_id;
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}
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+
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+bool dir_is_in_dump_location(const char *dir_name)
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+{
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+ unsigned len = strlen(g_settings_dump_location);
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+
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+ /* The path must start with "g_settings_dump_location" */
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+ if (strncmp(dir_name, g_settings_dump_location, len) != 0)
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+ {
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+ log_debug("Bad parent directory: '%s' not in '%s'", g_settings_dump_location, dir_name);
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+ return false;
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+ }
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+
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+ /* and must be a sub-directory of the g_settings_dump_location dir */
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+ const char *base_name = dir_name + len;
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+ while (*base_name && *base_name == '/')
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+ ++base_name;
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+
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+ if (*(base_name - 1) != '/' || !str_is_correct_filename(base_name))
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+ {
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+ log_debug("Invalid dump directory name: '%s'", base_name);
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+ return false;
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+ }
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+
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+ /* and we are sure it is a directory */
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+ struct stat sb;
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+ if (lstat(dir_name, &sb) < 0)
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+ {
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+ VERB2 perror_msg("stat('%s')", dir_name);
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+ return errno== ENOENT;
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+ }
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+
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+ return S_ISDIR(sb.st_mode);
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+}
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+
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+bool dir_has_correct_permissions(const char *dir_name)
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+{
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+ if (g_settings_privatereports)
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+ {
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+ struct stat statbuf;
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+ if (lstat(dir_name, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode))
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+ {
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+ error_msg("Path '%s' isn't directory", dir_name);
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+ return false;
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+ }
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+ /* Get ABRT's group gid */
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+ struct group *gr = getgrnam("abrt");
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+ if (!gr)
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+ {
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+ error_msg("Group 'abrt' does not exist");
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+ return false;
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+ }
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+ if (statbuf.st_uid != 0 || !(statbuf.st_gid == 0 || statbuf.st_gid == gr->gr_gid) || statbuf.st_mode & 07)
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+ return false;
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+ }
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+ return true;
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+}
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diff --git a/tests/Makefile.am b/tests/Makefile.am
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index 5ef08a0..416f579 100644
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--- a/tests/Makefile.am
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+++ b/tests/Makefile.am
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@@ -29,7 +29,8 @@ TESTSUITE_AT = \
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testsuite.at \
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pyhook.at \
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koops-parser.at \
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- ignored_problems.at
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+ ignored_problems.at \
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+ hooklib.at
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EXTRA_DIST += $(TESTSUITE_AT)
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TESTSUITE = $(srcdir)/testsuite
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diff --git a/tests/hooklib.at b/tests/hooklib.at
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new file mode 100644
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index 0000000..70631c6
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--- /dev/null
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+++ b/tests/hooklib.at
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@@ -0,0 +1,85 @@
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+# -*- Autotest -*-
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+
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+AT_BANNER([hooklib])
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+
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+AT_TESTFUN([dir_is_in_dump_location],
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+[[
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+#include "libabrt.h"
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+#include <assert.h>
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+
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+void test(char *name, bool expected)
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+{
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+ if (dir_is_in_dump_location(name) != expected)
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+ {
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+ fprintf(stderr, "Bad: %s", name);
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+ abort();
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+ }
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+
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+ free(name);
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+}
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+
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+int main(void)
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+{
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+ g_verbose = 3;
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+ load_abrt_conf();
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+
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+ g_verbose = 3;
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+
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+ char *name;
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+
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+ assert(dir_is_in_dump_location("/") == false);
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+
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+ asprintf(&name, "%s", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s..evil", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s///", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/.", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s///.", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/./", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/.///", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/..", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s///..", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/../", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/..///", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/good/../../../evil", g_settings_dump_location);
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+ test(name, false);
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+
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+ asprintf(&name, "%s/good..still", g_settings_dump_location);
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+ test(name, true);
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+
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+ asprintf(&name, "%s/good.new", g_settings_dump_location);
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+ test(name, true);
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+
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+ asprintf(&name, "%s/.meta", g_settings_dump_location);
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+ test(name, true);
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+
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+ asprintf(&name, "%s/..data", g_settings_dump_location);
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+ test(name, true);
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+
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+ return 0;
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+}
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+]])
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diff --git a/tests/testsuite.at b/tests/testsuite.at
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index b8f363d..765de2a 100644
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--- a/tests/testsuite.at
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+++ b/tests/testsuite.at
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@@ -4,3 +4,4 @@
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m4_include([koops-parser.at])
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m4_include([pyhook.at])
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m4_include([ignored_problems.at])
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+m4_include([hooklib.at])
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--
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1.8.3.1
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