Make xopen() skip stdin/stdout/stderr, add xopen_stdio() if you want stdout,

add xopenro() that takes one argument and understands "-" means stdin,
and switch over lots of users.

1 files changed, 3 insertions, 1 deletions

diff --git a/toys/pending/dhcp.c b/toys/pending/dhcp.c
index cb9d15a1..b99bb4c0 100644
--- a/toys/pending/dhcp.c
+++ b/toys/pending/dhcp.c
@@ -566,7 +566,9 @@ static void run_script(dhcpc_result_t *res,  char *name)
 static uint32_t getxid(void)
 {
   uint32_t randnum;
-  int fd = xopen("/dev/urandom", O_RDONLY);
+  int fd = xopenro("/dev/urandom");
+
+// TODO xreadfile
   xreadall(fd, &randnum, sizeof(randnum));
   xclose(fd);
   return randnum;