rexec: convert to strnprintf()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/rexec.c b/src/lxc/rexec.c
index 501aeedb7fd27d75dc3dae530f0673673754f7ca..b0bb9050cb6d2adb01a741e1afda6632efc0edcf 100644 (file)
--- a/src/lxc/rexec.c
+++ b/src/lxc/rexec.c
@@ -98,9 +98,9 @@ static void lxc_rexec_as_memfd(char **argv, char **envp, const char *memfd_name)
        if (memfd < 0) {
                char template[PATH_MAX];
 
-               ret = snprintf(template, sizeof(template),
-                              P_tmpdir "/.%s_XXXXXX", memfd_name);
-               if (ret < 0 || (size_t)ret >= sizeof(template))
+               ret = strnprintf(template, sizeof(template),
+                                P_tmpdir "/.%s_XXXXXX", memfd_name);
+               if (ret < 0)
                        return;
 
                tmpfd = lxc_make_tmpfile(template, true);
@@ -151,8 +151,8 @@ static void lxc_rexec_as_memfd(char **argv, char **envp, const char *memfd_name)
        } else {
                char procfd[LXC_PROC_PID_FD_LEN];
 
-               ret = snprintf(procfd, sizeof(procfd), "/proc/self/fd/%d", tmpfd);
-               if (ret < 0 || (size_t)ret >= sizeof(procfd))
+               ret = strnprintf(procfd, sizeof(procfd), "/proc/self/fd/%d", tmpfd);
+               if (ret < 0)
                        return;
 
                execfd = open(procfd, O_PATH | O_CLOEXEC);