vfio/container: Replace basename with g_path_get_basename

g_path_get_basename() is a portable utility function that has the
advantage of not modifing the string argument. It also fixes a compile
breakage with the Musl C library reported in [1].

[1] https://lore.kernel.org/all/20231212010228.2701544-1-raj.khem@gmail.com/

Reported-by: Khem Raj <raj.khem@gmail.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
(cherry picked from commit 213ae3ffda463c0503e39e0cf827511b5298c314)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index 242010036af33faa325a34008af40c2cc67a02ea..adc3005beb7b07d8541fdd9656558ebebfad20b0 100644 (file)
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -848,7 +848,8 @@ static void vfio_put_base_device(VFIODevice *vbasedev)
 
 static int vfio_device_groupid(VFIODevice *vbasedev, Error **errp)
 {
-    char *tmp, group_path[PATH_MAX], *group_name;
+    char *tmp, group_path[PATH_MAX];
+    g_autofree char *group_name = NULL;
     int ret, groupid;
     ssize_t len;
 
@@ -864,7 +865,7 @@ static int vfio_device_groupid(VFIODevice *vbasedev, Error **errp)
 
     group_path[len] = 0;
 
-    group_name = basename(group_path);
+    group_name = g_path_get_basename(group_path);
     if (sscanf(group_name, "%d", &groupid) != 1) {
         error_setg_errno(errp, errno, "failed to read %s", group_path);
         return -errno;