musl/src/stdio/fclose.c

#include "stdio_impl.h"
#include "libc.h"

static void dummy(FILE *f) { }
weak_alias(dummy, __unlist_locked_file);

int fclose(FILE *f)
{
	int r;
	int perm;
	
	FLOCK(f);

	__unlist_locked_file(f);

	if (!(perm = f->flags & F_PERM)) {
		FILE **head = __ofl_lock();
		if (f->prev) f->prev->next = f->next;
		if (f->next) f->next->prev = f->prev;
		if (*head == f) *head = f->next;
		__ofl_unlock();
	}

	r = fflush(f);
	r |= f->close(f);

	if (f->getln_buf) free(f->getln_buf);
	if (!perm) free(f);
	else FUNLOCK(f);

	return r;
}