From fd685bad3b3835536c5b0f5b5b18f5ab13f32bf4 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Thu, 28 Nov 2024 00:16:54 +0100
Subject: add missing files
---
userland/libc/stdio/fdopen.c | 58 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
create mode 100644 userland/libc/stdio/fdopen.c
(limited to 'userland/libc/stdio/fdopen.c')
diff --git a/userland/libc/stdio/fdopen.c b/userland/libc/stdio/fdopen.c
new file mode 100644
index 0000000..9e7c7c6
--- /dev/null
+++ b/userland/libc/stdio/fdopen.c
@@ -0,0 +1,58 @@
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+// FIXME: All modes not implemented
+// https://pubs.opengroup.org/onlinepubs/9699919799/functions/fdopen.html
+FILE *fdopen(int fildes, const char *mode) {
+ FILE *r = calloc(1, sizeof(FILE));
+ if (!r) {
+ errno = -ENOMEM;
+ return NULL;
+ }
+
+ for (; *mode; mode++) {
+ // r or rb
+ // Open file for reading.
+ // w or wb
+ // Truncate to zero length or create file for writing.
+ // a or ab
+ // Append; open or create file for writing at
+ // end-of-file.
+ switch (*mode) {
+ case 'r':
+ r->can_read = 1;
+ break;
+ case 'w':
+ r->can_write = 1;
+ break;
+ case 'a':
+ r->append = 1;
+ break;
+ }
+ }
+
+ struct stat s;
+ if (-1 == fstat(fildes, &s)) {
+ free(r);
+ errno = -EBADF;
+ return NULL;
+ }
+
+ r->read = read_fd;
+ r->write = write_fd;
+ r->seek = seek_fd;
+ r->has_error = 0;
+ r->is_eof = 0;
+ r->offset_in_file = 0;
+ r->file_size = s.st_size;
+ r->cookie = NULL;
+ r->fd = fildes;
+ r->read_buffer = NULL;
+ r->read_buffer_stored = 0;
+ r->fflush = fflush_fd;
+ r->has_control_over_the_fd = 0;
+ return r;
+}
--
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