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utils: del realpath from read_file

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Since the path in read_file is constructed by vmtop, there is no need
to use realpath to modify the path. So, del realpath to release cpu time.

Signed-off-by: nocjj <1250062498@qq.com>
This commit is contained in:
Huawei Technologies Co., Ltd 2021-03-16 20:04:32 +08:00 committed by Alex Chen
parent 6c00a8de63
commit ec90fc1e17
1 changed files with 35 additions and 0 deletions
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utils-del-realpath-from-read_file.patch Normal file
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@ -0,0 +1,35 @@
From 6f48c7f25e6db54941c110517ff25648d6287ec8 Mon Sep 17 00:00:00 2001
From: nocjj <1250062498@qq.com>
Date: Tue, 16 Mar 2021 20:04:32 +0800
Subject: [PATCH] utils: del realpath from read_file
Since the path in read_file is constructed by vmtop, there is no need
to use realpath to modify the path. So, del realpath to release cpu time.
Signed-off-by: nocjj <1250062498@qq.com>
---
src/utils.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/src/utils.c b/src/utils.c
index 3cb1146..29de9c9 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -24,12 +24,11 @@ int read_file(char *buf, int bufsize, const char *path)
{
int fd;
int len;
- char mpath[PATH_MAX];
- if (strlen(path) > PATH_MAX - 1 || realpath(path, mpath) == NULL) {
+ if (strlen(path) > PATH_MAX - 1) {
return -1;
}
- fd = open(mpath, O_RDONLY, 0);
+ fd = open(path, O_RDONLY, 0);
if (fd == -1) {
return -1;
}
--
2.27.0