github.com/afumu/libc@v0.0.6/musl/src/stdio/__fopen_rb_ca.c (about)

     1  #include "stdio_impl.h"
     2  #include <fcntl.h>
     3  #include <string.h>
     4  
     5  FILE *__fopen_rb_ca(const char *filename, FILE *f, unsigned char *buf, size_t len)
     6  {
     7  	memset(f, 0, sizeof *f);
     8  
     9  	f->fd = sys_open(filename, O_RDONLY|O_CLOEXEC);
    10  	if (f->fd < 0) return 0;
    11  	__syscall(SYS_fcntl, f->fd, F_SETFD, FD_CLOEXEC);
    12  
    13  	f->flags = F_NOWR | F_PERM;
    14  	f->buf = buf + UNGET;
    15  	f->buf_size = len - UNGET;
    16  	f->read = __stdio_read;
    17  	f->seek = __stdio_seek;
    18  	f->close = __stdio_close;
    19  	f->lock = -1;
    20  
    21  	return f;
    22  }