#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)
{
close(p[1]);
return NULL;
case 0:
- dup2(p[1-op], 1-op);
- close(p[0]);
- close(p[1]);
+ if (dup2(p[1-op], 1-op) < 0) _exit(127);
+ if (p[0] != 1-op) close(p[0]);
+ if (p[1] != 1-op) close(p[1]);
execl("/bin/sh", "sh", "-c", cmd, (char *)0);
_exit(127);
}