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libio: Update number of written bytes in dprintf implementation

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The __printf_buffer_flush_dprintf function needs to record that
the buffer has been written before reusing it.  Without this
accounting, dprintf always returns zero.

Fixes commit 8ece45e4f5
("libio: Convert __vdprintf_internal to buffers").

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2023-01-31 22:22:02 +01:00
parent 2f39e44a84
commit f5c65fa920
3 changed files with 47 additions and 0 deletions
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libio/iovdprintf.c
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@@ -54,6 +54,7 @@ __printf_buffer_flush_dprintf (struct __printf_buffer_dprintf *buf)
}
p += ret;
}
buf->base.written += buf->base.write_ptr - buf->base.write_base;
buf->base.write_ptr = buf->buf;
}