fix dup3 ignoring all flags but O_CLOEXEC on archs with SYS_dup2 syscall

[musl] / src / stdio / tmpnam.c

diff --git a/src/stdio/tmpnam.c b/src/stdio/tmpnam.c
index c3f5a2f..71dc8bb 100644 (file)
--- a/src/stdio/tmpnam.c
+++ b/src/stdio/tmpnam.c
@@ -3,12 +3,11 @@
 #include <errno.h>
 #include <sys/stat.h>
 #include <string.h>
+#include <stdlib.h>
 #include "syscall.h"
 
 #define MAXTRIES 100
 
-char *__randname(char *);
-
 char *tmpnam(char *buf)
 {
        static char internal[L_tmpnam];
@@ -17,7 +16,11 @@ char *tmpnam(char *buf)
        int r;
        for (try=0; try<MAXTRIES; try++) {
                __randname(s+12);
-               r = __syscall(SYS_lstat, s, &(struct stat){0});
+#ifdef SYS_readlink
+               r = __syscall(SYS_readlink, s, (char[1]){0}, 1);
+#else
+               r = __syscall(SYS_readlinkat, AT_FDCWD, s, (char[1]){0}, 1);
+#endif
                if (r == -ENOENT) return strcpy(buf ? buf : internal, s);
        }
        return 0;