LibC: Allow open to accept multiple arguments

2 files changed, 12 insertions, 2 deletions

diff --git a/userland/libc/include/fcntl.h b/userland/libc/include/fcntl.h
index 7f0906d..29134be 100644
--- a/userland/libc/include/fcntl.h
+++ b/userland/libc/include/fcntl.h
@@ -4,9 +4,10 @@
 #define O_WRITE (1 << 2)
 #define O_CREAT (1 << 3)
 #define O_TRUNC (1 << 4)
+#define O_APPEND (1 << 5)
 
 #define O_RDONLY O_READ
 #define O_WRONLY O_WRITE
 #define O_RDWR (O_WRITE | O_READ)
 
-int open(const char *file, int flags, int mode);
+int open(const char *file, int flags, ...);
diff --git a/userland/libc/libc.c b/userland/libc/libc.c
index e2f064d..dafd502 100644
--- a/userland/libc/libc.c
+++ b/userland/libc/libc.c
@@ -1,5 +1,6 @@
 #include <assert.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <stdio.h>
 #include <string.h>
 #include <syscall.h>
@@ -181,7 +182,15 @@ void perror(const char *s) {
   printf("%s\n", strerror(errno));
 }
 
-int open(const char *file, int flags, int mode) {
+int open(const char *file, int flags, ...) {
+  mode_t mode = 0;
+
+  if (flags & O_CREAT) {
+    va_list ap;
+    va_start(ap, flags);
+    mode = va_arg(ap, mode_t);
+    va_end(ap);
+  }
   struct SYS_OPEN_PARAMS args = {
       .file = file,
       .flags = flags,