rewrite popen to use posix_spawn instead of fragile vfork hacks

[musl] / src / stdio / __stdio_write.c

diff --git a/src/stdio/__stdio_write.c b/src/stdio/__stdio_write.c
index da45673..e52e91a 100644 (file)
--- a/src/stdio/__stdio_write.c
+++ b/src/stdio/__stdio_write.c
@@ -1,4 +1,5 @@
 #include "stdio_impl.h"
+#include <sys/uio.h>
 #include <pthread.h>
 
 static void cleanup(void *p)
@@ -18,9 +19,13 @@ size_t __stdio_write(FILE *f, const unsigned char *buf, size_t len)
        int iovcnt = 2;
        ssize_t cnt;
        for (;;) {
-               pthread_cleanup_push(cleanup, f);
-               cnt = syscall_cp(SYS_writev, f->fd, iov, iovcnt);
-               pthread_cleanup_pop(0);
+               if (libc.main_thread) {
+                       pthread_cleanup_push(cleanup, f);
+                       cnt = syscall_cp(SYS_writev, f->fd, iov, iovcnt);
+                       pthread_cleanup_pop(0);
+               } else {
+                       cnt = syscall(SYS_writev, f->fd, iov, iovcnt);
+               }
                if (cnt == rem) {
                        f->wend = f->buf + f->buf_size;
                        f->wpos = f->wbase = f->buf;