stdio library code dishonors BUFSIZ for setbuf()

[schily]

If a program calls:

char buf[BUFSIZ];

setbuf(stdout, buf);

then call many:
putc(char, fp);

stdio still tries to write more than BUFSIZ (1024) bytes into the buffer and overwrites it. This causes other global varibables in the binary (located past buf) to be overwritten.

This bug seems to be related to bug #3411

[schily]

Even with haiku-pre-alpha-gcc4-hrev31728-raw.zip BUFSIZE is not honored and the stdio code in libc overwrites the buffer resulting in a core dump.

[bonefish]

Fixed in hrev31776.

[schily]

OK, the bug seems to be fixed now. The program that did dump core no longer fails.