[PATCH 6/7] ndctl: cxl: add logging functions for monitor

[Dave Jiang <dave.jiang@intel.com>]

Duplicate log functions from ndctl/monitor to use for stdout and file
logging.

Signed-off-by: Dave Jiang <dave.jiang@gmail.com>
---
 cxl/monitor.c |   26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/cxl/monitor.c b/cxl/monitor.c
index 2ab2e249f575..e030542a3fe8 100644
--- a/cxl/monitor.c
+++ b/cxl/monitor.c
@@ -39,6 +39,32 @@ static struct monitor {
 	bool human;
 } monitor;
 
+static void log_standard(struct log_ctx *ctx, int priority, const char *file,
+		int line, const char *fn, const char *format, va_list args)
+{
+	if (priority == 6)
+		vfprintf(stdout, format, args);
+	else
+		vfprintf(stderr, format, args);
+}
+
+static void log_file(struct log_ctx *ctx, int priority, const char *file,
+		int line, const char *fn, const char *format, va_list args)
+{
+	FILE *f = monitor.log_file;
+
+	if (priority != LOG_NOTICE) {
+		struct timespec ts;
+
+		clock_gettime(CLOCK_REALTIME, &ts);
+		fprintf(f, "[%10ld.%09ld] [%d] ", ts.tv_sec, ts.tv_nsec, getpid());
+		vfprintf(f, format, args);
+	} else
+		vfprintf(f, format, args);
+
+	fflush(f);
+}
+
 static int monitor_event(struct cxl_ctx *ctx)
 {
 	int fd, epollfd, rc = 0, timeout = -1;