From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 20 Jun 2012 18:39:50 +0000 (-0400)
Subject: make popen cancellation-safe
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=9c21f4342c787e04a9e31ad8a1d87a65c89968ca

make popen cancellation-safe

close was the only cancellation point called from popen, but it left
popen with major resource leaks if any call to close got cancelled.
the easiest, cheapest fix is just to use a non-cancellable close
function.
---

diff --git a/src/stdio/popen.c b/src/stdio/popen.c
index 50765daa..4f9d6e9e 100644
--- a/src/stdio/popen.c
+++ b/src/stdio/popen.c
@@ -1,4 +1,11 @@
 #include "stdio_impl.h"
+#include "syscall.h"
+
+static inline void nc_close(int fd)
+{
+	__syscall(SYS_close, fd);
+}
+#define close(x) nc_close(x)
 
 FILE *popen(const char *cmd, const char *mode)
 {