[LTP] [PATCH v3 2/3] Add new tst_flush() library function
Michael Moese
mmoese@suse.de
Fri Mar 9 15:16:08 CET 2018
Add a new library function to flush stderr and stdout streams:
void tst_flush(void)
This function flushes stderr and stdout streams. In case of an
error, the test is aborted with TBROK and an error message is
printed.
Signed-off-by: Michael Moese <mmoese@suse.de>
---
doc/test-writing-guidelines.txt | 8 ++++++++
include/tst_test.h | 3 +++
lib/tst_test.c | 15 +++++++++++++++
3 files changed, 26 insertions(+)
diff --git a/doc/test-writing-guidelines.txt b/doc/test-writing-guidelines.txt
index 739b295b8..4c60cd66b 100644
--- a/doc/test-writing-guidelines.txt
+++ b/doc/test-writing-guidelines.txt
@@ -465,6 +465,14 @@ Allows for setting timeout per test iteration dymanically in the test setup(),
the timeout is specified in seconds. There are a few testcases whose runtime
can vary arbitrarily, these can disable timeouts by setting it to -1.
+[source,c]
+------------------------------------------------------------------------------
+void tst_flush(void);
+-------------------------------------------------------------------------------
+
+Flush stderr and stdout streams, handling errors appropriately.
+You should not use fflush() for stderr or stdout.
+
2.2.3 Test temporary directory
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/include/tst_test.h b/include/tst_test.h
index af97b8983..54ff306d9 100644
--- a/include/tst_test.h
+++ b/include/tst_test.h
@@ -70,6 +70,9 @@ void tst_brk_(const char *file, const int lineno, int ttype,
#define tst_brk(ttype, arg_fmt, ...) \
tst_brk_(__FILE__, __LINE__, (ttype), (arg_fmt), ##__VA_ARGS__)
+/* flush stderr and stdout */
+void tst_flush(void);
+
pid_t safe_fork(const char *filename, unsigned int lineno);
#define SAFE_FORK() \
safe_fork(__FILE__, __LINE__)
diff --git a/lib/tst_test.c b/lib/tst_test.c
index 2cf35ed66..9b4f43828 100644
--- a/lib/tst_test.c
+++ b/lib/tst_test.c
@@ -1085,3 +1085,18 @@ void tst_run_tcases(int argc, char *argv[], struct tst_test *self)
do_exit(ret);
}
+
+
+void tst_flush(void)
+{
+ int rval;
+
+ rval = fflush(stderr);
+ if (rval != 0)
+ tst_brk(TBROK | TERRNO, "fflush(stderr) failed");
+
+ rval = fflush(stderr);
+ if (rval != 0)
+ tst_brk(TBROK | TERRNO, "fflush(stdout) failed");
+
+}
--
2.13.6
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