fix multiple stdio functions' behavior on zero-length operations
[oweals/musl.git] / src / stdio / putc.c
1 #include "stdio_impl.h"
2
3 int putc(int c, FILE *f)
4 {
5         if (f->lock < 0 || !__lockfile(f))
6                 return putc_unlocked(c, f);
7         c = putc_unlocked(c, f);
8         __unlockfile(f);
9         return c;
10 }
11
12 weak_alias(putc, _IO_putc);