LU-16980 build: fix gcc-12 [-Werror=format-truncation=] error

[fs/lustre-release.git] / lnet / utils / lnetconfig / liblnetconfig.c

diff --git a/lnet/utils/lnetconfig/liblnetconfig.c b/lnet/utils/lnetconfig/liblnetconfig.c
index ff90496..15d9879 100644 (file)
--- a/lnet/utils/lnetconfig/liblnetconfig.c
+++ b/lnet/utils/lnetconfig/liblnetconfig.c
@@ -87,12 +87,12 @@ int open_sysfs_file(const char *path, const char *attr, const int mode)
 {
        int fd;
        char filename[LNET_MAX_STR_LEN];
+       size_t size = sizeof(filename);
+       int namelen;
 
-       if (strlen(path) + strlen(attr) >= LNET_MAX_STR_LEN)
-               return -1;
-
-       snprintf(filename, sizeof(filename), "%s%s",
-                path, attr);
+       namelen = snprintf(filename, size, "%s%s", path, attr);
+       if (namelen >= size)
+               filename[size - 1] = '\0';
 
        fd = open(filename, mode);