selftest: acct: Add selftest for the acct() syscall

The acct() system call enables or disables process accounting.
If accounting is turned on, records for each terminating process
are appended to a specified filename as it terminates. An argument of NULL
causes accounting to be turned off.

This patch will add a test for the acct() syscall.

Signed-off-by: Abdulrasaq Lawani <abdulrasaqolawani@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index af2429431b6b2f08836dad0268fde683e9d0166d..f51fcceb45fd6b3d56022613bc3cf4a3c5227643 100644 (file)
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
+TARGETS += acct
 TARGETS += alsa
 TARGETS += amd-pstate
 TARGETS += arm64

diff --git a/tools/testing/selftests/acct/.gitignore b/tools/testing/selftests/acct/.gitignore
new file mode 100644 (file)
index 0000000..7e78aac
--- /dev/null
+++ b/tools/testing/selftests/acct/.gitignore
@@ -0,0 +1,3 @@
+acct_syscall
+config
+process_log
\ No newline at end of file

diff --git a/tools/testing/selftests/acct/Makefile b/tools/testing/selftests/acct/Makefile
new file mode 100644 (file)
index 0000000..7e02509
--- /dev/null
+++ b/tools/testing/selftests/acct/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+TEST_GEN_PROGS := acct_syscall
+CFLAGS += -Wall
+
+include ../lib.mk
\ No newline at end of file

diff --git a/tools/testing/selftests/acct/acct_syscall.c b/tools/testing/selftests/acct/acct_syscall.c
new file mode 100644 (file)
index 0000000..e44e8fe
--- /dev/null
+++ b/tools/testing/selftests/acct/acct_syscall.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* kselftest for acct() system call
+ *  The acct() system call enables or disables process accounting.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/wait.h>
+
+#include "../kselftest.h"
+
+int main(void)
+{
+       char filename[] = "process_log";
+       FILE *fp;
+       pid_t child_pid;
+       int sz;
+
+       // Setting up kselftest framework
+       ksft_print_header();
+       ksft_set_plan(1);
+
+       // Check if test is run a root
+       if (geteuid()) {
+               ksft_test_result_skip("This test needs root to run!\n");
+               return 1;
+       }
+
+       // Create file to log closed processes
+       fp = fopen(filename, "w");
+
+       if (!fp) {
+               ksft_test_result_error("%s.\n", strerror(errno));
+               ksft_finished();
+               return 1;
+       }
+
+       acct(filename);
+
+       // Handle error conditions
+       if (errno) {
+               ksft_test_result_error("%s.\n", strerror(errno));
+               fclose(fp);
+               ksft_finished();
+               return 1;
+       }
+
+       // Create child process and wait for it to terminate.
+
+       child_pid = fork();
+
+       if (child_pid < 0) {
+               ksft_test_result_error("Creating a child process to log failed\n");
+               acct(NULL);
+               return 1;
+       } else if (child_pid > 0) {
+               wait(NULL);
+               fseek(fp, 0L, SEEK_END);
+               sz = ftell(fp);
+
+               acct(NULL);
+
+               if (sz <= 0) {
+                       ksft_test_result_fail("Terminated child process not logged\n");
+                       ksft_exit_fail();
+                       return 1;
+               }
+
+               ksft_test_result_pass("Successfully logged terminated process.\n");
+               fclose(fp);
+               ksft_exit_pass();
+               return 0;
+       }
+
+       return 1;
+}