1#include "stdio_impl.h"
 2#include <fcntl.h>
 3#include <string.h>
 4
 5FILE *__fopen_rb_ca(const char *filename, FILE *f, unsigned char *buf, size_t len)
 6{
 7	memset(f, 0, sizeof *f);
 8
 9#ifdef __wasilibc_unmodified_upstream // WASI has no sys_open
10	f->fd = sys_open(filename, O_RDONLY|O_CLOEXEC);
11#else
12	f->fd = open(filename, O_RDONLY|O_CLOEXEC);
13#endif
14	if (f->fd < 0) return 0;
15#ifdef __wasilibc_unmodified_upstream // WASI has no syscall
16	__syscall(SYS_fcntl, f->fd, F_SETFD, FD_CLOEXEC);
17#else
18	fcntl(f->fd, F_SETFD, FD_CLOEXEC);
19#endif
20
21	f->flags = F_NOWR | F_PERM;
22	f->buf = buf + UNGET;
23	f->buf_size = len - UNGET;
24	f->read = __stdio_read;
25	f->seek = __stdio_seek;
26	f->close = __stdio_close;
27#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
28	f->lock = -1;
29#endif
30
31	return f;
32}