correctly handle write errors encountered by printf-family functions
[oweals/musl.git] / src / stdio / __stdio_exit.c
1 #include "stdio_impl.h"
2
3 static FILE *volatile dummy_file = 0;
4 weak_alias(dummy_file, __stdin_used);
5 weak_alias(dummy_file, __stdout_used);
6 weak_alias(dummy_file, __stderr_used);
7
8 static void close_file(FILE *f)
9 {
10         if (!f) return;
11         FFINALLOCK(f);
12         if (f->wpos > f->wbase) f->write(f, 0, 0);
13         if (f->rpos < f->rend) f->seek(f, f->rpos-f->rend, SEEK_CUR);
14 }
15
16 void __stdio_exit(void)
17 {
18         FILE *f;
19         OFLLOCK();
20         for (f=libc.ofl_head; f; f=f->next) close_file(f);
21         close_file(__stdin_used);
22         close_file(__stdout_used);
23 }
24
25 weak_alias(__stdio_exit, __stdio_exit_needed);