[PATCH v7 08/10] test: fix overflow warnings in several places by using common code

[Stephen Hemminger <stephen@networkplumber.org>]

Several tests lookup the current file prefix and
format up a filename argument. Avoid any possible format
overflows by allowing for bigger string.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 app/test/test_mp_secondary.c    | 14 ++++----------
 app/test/test_pdump.c           | 13 ++++---------
 app/test/test_timer_secondary.c | 12 ++++--------
 3 files changed, 12 insertions(+), 27 deletions(-)

diff --git a/app/test/test_mp_secondary.c b/app/test/test_mp_secondary.c
index f3694530a8..fc295323f2 100644
--- a/app/test/test_mp_secondary.c
+++ b/app/test/test_mp_secondary.c
@@ -67,17 +67,11 @@ run_secondary_instances(void)
 {
 	int ret = 0;
 	char coremask[10];
+	const char *prefix;
 
-#ifdef RTE_EXEC_ENV_LINUX
-	char tmp[PATH_MAX] = {0};
-	char prefix[PATH_MAX] = {0};
-
-	get_current_prefix(tmp, sizeof(tmp));
-
-	snprintf(prefix, sizeof(prefix), "--file-prefix=%s", tmp);
-#else
-	const char *prefix = "";
-#endif
+	prefix = file_prefix_arg();
+	if (prefix == NULL)
+		return -1;
 
 	/* good case, using secondary */
 	const char *argv1[] = {
diff --git a/app/test/test_pdump.c b/app/test/test_pdump.c
index 9f7769707e..cd044f0f69 100644
--- a/app/test/test_pdump.c
+++ b/app/test/test_pdump.c
@@ -174,16 +174,11 @@ run_pdump_server_tests(void)
 {
 	int ret = 0;
 	char coremask[10];
+	const char *prefix;
 
-#ifdef RTE_EXEC_ENV_LINUX
-	char tmp[PATH_MAX] = { 0 };
-	char prefix[PATH_MAX] = { 0 };
-
-	get_current_prefix(tmp, sizeof(tmp));
-	snprintf(prefix, sizeof(prefix), "--file-prefix=%s", tmp);
-#else
-	const char *prefix = "";
-#endif
+	prefix = file_prefix_arg();
+	if (prefix == NULL)
+		return -1;
 
 	/* good case, using secondary */
 	const char *const argv1[] = {
diff --git a/app/test/test_timer_secondary.c b/app/test/test_timer_secondary.c
index 4e220559b4..bd618b3cfc 100644
--- a/app/test/test_timer_secondary.c
+++ b/app/test/test_timer_secondary.c
@@ -51,16 +51,12 @@ static int
 timer_secondary_spawn_wait(unsigned int lcore)
 {
 	char coremask[10];
-#ifdef RTE_EXEC_ENV_LINUXAPP
-	char tmp[PATH_MAX] = {0};
-	char prefix[PATH_MAX] = {0};
+	const char *prefix;
 
-	get_current_prefix(tmp, sizeof(tmp));
+	prefix = file_prefix_arg();
+	if (prefix == NULL)
+		return -1;
 
-	snprintf(prefix, sizeof(prefix), "--file-prefix=%s", tmp);
-#else
-	const char *prefix = "";
-#endif
 	char const *argv[] = {
 		prgname,
 		"-c", coremask,
-- 
2.51.0