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-rw-r--r--src/stdio/__stdio_read.c10
-rw-r--r--src/stdio/__stdio_write.c10
2 files changed, 14 insertions, 6 deletions
diff --git a/src/stdio/__stdio_read.c b/src/stdio/__stdio_read.c
index ee17a576..c99ca9a9 100644
--- a/src/stdio/__stdio_read.c
+++ b/src/stdio/__stdio_read.c
@@ -15,9 +15,13 @@ size_t __stdio_read(FILE *f, unsigned char *buf, size_t len)
 	};
 	ssize_t cnt;
 
-	pthread_cleanup_push(cleanup, f);
-	cnt = syscall_cp(SYS_readv, f->fd, iov, 2);
-	pthread_cleanup_pop(0);
+	if (libc.main_thread) {
+		pthread_cleanup_push(cleanup, f);
+		cnt = syscall_cp(SYS_readv, f->fd, iov, 2);
+		pthread_cleanup_pop(0);
+	} else {
+		cnt = syscall(SYS_readv, f->fd, iov, 2);
+	}
 	if (cnt <= 0) {
 		f->flags |= F_EOF ^ ((F_ERR^F_EOF) & cnt);
 		f->rpos = f->rend = 0;
diff --git a/src/stdio/__stdio_write.c b/src/stdio/__stdio_write.c
index da45673f..cef7bbdc 100644
--- a/src/stdio/__stdio_write.c
+++ b/src/stdio/__stdio_write.c
@@ -18,9 +18,13 @@ 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;