[dm-devel] [PATCH v2 13/21] multipathd (coverity): simplify set_oom_adj()

[mwilck at suse.com]

From: Martin Wilck <mwilck at suse.com>

Coverity discourages stat-before-open. So simplify this function.

Reviewed-by: Benjamin Marzinski <bmarzins at redhat.com>
Signed-off-by: Martin Wilck <mwilck at suse.com>
---
 multipathd/main.c | 53 ++++++++++++++---------------------------------
 1 file changed, 15 insertions(+), 38 deletions(-)

diff --git a/multipathd/main.c b/multipathd/main.c
index 1be42c5..36cc76f 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -2952,51 +2952,28 @@ setscheduler (void)
 	return;
 }
 
-static void
-set_oom_adj (void)
+static void set_oom_adj(void)
 {
-#ifdef OOM_SCORE_ADJ_MIN
-	int retry = 1;
-	char *file = "/proc/self/oom_score_adj";
-	int score = OOM_SCORE_ADJ_MIN;
-#else
-	int retry = 0;
-	char *file = "/proc/self/oom_adj";
-	int score = OOM_ADJUST_MIN;
-#endif
 	FILE *fp;
-	struct stat st;
-	char *envp;
 
-	envp = getenv("OOMScoreAdjust");
-	if (envp) {
+	if (getenv("OOMScoreAdjust")) {
 		condlog(3, "Using systemd provided OOMScoreAdjust");
 		return;
 	}
-	do {
-		if (stat(file, &st) == 0){
-			fp = fopen(file, "w");
-			if (!fp) {
-				condlog(0, "couldn't fopen %s : %s", file,
-					strerror(errno));
-				return;
-			}
-			fprintf(fp, "%i", score);
-			fclose(fp);
-			return;
-		}
-		if (errno != ENOENT) {
-			condlog(0, "couldn't stat %s : %s", file,
-				strerror(errno));
-			return;
-		}
-#ifdef OOM_ADJUST_MIN
-		file = "/proc/self/oom_adj";
-		score = OOM_ADJUST_MIN;
-#else
-		retry = 0;
+#ifdef OOM_SCORE_ADJ_MIN
+	fp = fopen("/proc/self/oom_score_adj", "w");
+	if (fp) {
+		fprintf(fp, "%i", OOM_SCORE_ADJ_MIN);
+		fclose(fp);
+		return;
+	}
 #endif
-	} while (retry--);
+	fp = fopen("/proc/self/oom_adj", "w");
+	if (fp) {
+		fprintf(fp, "%i", OOM_ADJUST_MIN);
+		fclose(fp);
+		return;
+	}
 	condlog(0, "couldn't adjust oom score");
 }
 
-- 
2.33.1