lib: libc: Add "rb" mode for fopen()expt

This commit adds the "rb" mode for compatibility purposes. It is mapped
to the same file seal as "r".

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/libc/src/stdio/fopen.c b/lib/libc/src/stdio/fopen.c
index c15dace..efeb577 100644
--- a/lib/libc/src/stdio/fopen.c
+++ b/lib/libc/src/stdio/fopen.c
@@ -51,6 +51,8 @@ fopen(const char *__restrict path, const char *__restrict mode)
         seal |= (O_WRONLY | O_CREAT);
     } else if (strcmp(mode, "r+") == 0) {
         seal |= O_RDWR;
+    } else if (strcmp(mode, "rb") == 0) {
+        seal |= O_RDONLY;
     } else {
         return NULL;
     }