fix usage of locks with vfork

[musl] / src / process / system.c

diff --git a/src/process/system.c b/src/process/system.c
index c8f2600..ebe207f 100644 (file)
--- a/src/process/system.c
+++ b/src/process/system.c
@@ -29,7 +29,8 @@ int system(const char *cmd)
 
        __acquire_ptc();
        pid = __vfork();
-       __release_ptc();
+
+       if (pid) __release_ptc();
 
        if (pid > 0) {
                sigset_t new = old;