index 0f6a727a8c267cdeb3a93c30bc688bb64ecd8003..e3393690dd3b79af80e6b95710583e744fd574d4 100644 (file)
--- a/shell.c
+++ b/shell.c
{
char *prog;
struct commands *cmd;
+ int devnull_fd;
+
+ /*
+ * Always open file descriptors 0/1/2 to avoid clobbering files
+ * in die(). It also avoids not messing up when the pipes are
+ * dup'ed onto stdin/stdout/stderr in the child processes we spawn.
+ */
+ devnull_fd = open("/dev/null", O_RDWR);
+ while (devnull_fd >= 0 && devnull_fd <= 2)
+ devnull_fd = dup(devnull_fd);
+ if (devnull_fd == -1)
+ die("opening /dev/null failed (%s)", strerror(errno));
+ close (devnull_fd);
/*
* Special hack to pretend to be a CVS server