[LTP] [PATCH] acct01: add a check routine for acct implmentation

["Honggyu Kim" <hong.gyu.kim@lge.com>]

A check routine for acct implemation is added at the beginning of the test.
check_acct_in_kernel function calls acct(NULL) and checks if errno is ENOSYS.
It means that acct system call is not implemented in kernel.
The other ENOSYS check routines in setup are removed.
This patch prevents from unintentional calling acct again in cleanup, which
makes TCONF to TBROK and helps configuration issues stay as TCONF.

Signed-off-by: Honggyu Kim <hong.gyu.kim@lge.com>
---
 testcases/kernel/syscalls/acct/acct01.c |   32 +++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/testcases/kernel/syscalls/acct/acct01.c b/testcases/kernel/syscalls/acct/acct01.c
index 8236042..4a34383 100644
--- a/testcases/kernel/syscalls/acct/acct01.c
+++ b/testcases/kernel/syscalls/acct/acct01.c
@@ -124,12 +124,28 @@ int main(int argc, char *argv[])
 	tst_exit();
 }
 
+static void check_acct_in_kernel(void)
+{
+	/* check if acct is implemented in kernel */
+	if (acct(NULL) == -1) {
+		if (errno == ENOSYS) {
+			tst_resm(TCONF,
+				 "BSD process accounting is not configured in "
+				 "this kernel");
+
+			tst_exit();
+		}
+	}
+}
+
 static void setup(void)
 {
 	int fd;
 
 	tst_require_root(NULL);
 
+	check_acct_in_kernel();
+
 	tst_tmpdir();
 
 	ltpuser = SAFE_GETPWNAM(cleanup, "nobody");
@@ -138,24 +154,12 @@ static void setup(void)
 	SAFE_CLOSE(cleanup, fd);
 
 	if (acct(TEST_FILE5) == -1) {
-		if (errno == ENOSYS) {
-			tst_brkm(TCONF, cleanup,
-				 "BSD process accounting is not configured in "
-				 "this kernel");
-		} else {
-			tst_brkm(TBROK | TERRNO, cleanup, "acct failed unexpectedly");
-		}
+		tst_brkm(TBROK | TERRNO, cleanup, "acct failed unexpectedly");
 	}
 
 	/* turn off acct, so we are in a known state */
 	if (acct(NULL) == -1) {
-		if (errno == ENOSYS) {
-			tst_brkm(TCONF, cleanup,
-				 "BSD process accounting is not configured in "
-				 "this kernel");
-		} else {
-			tst_brkm(TBROK | TERRNO, cleanup, "acct(NULL) failed");
-		}
+		tst_brkm(TBROK | TERRNO, cleanup, "acct(NULL) failed");
 	}
 
 	/* ELOOP SETTING */
-- 
1.7.9.5



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