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0440ed69ea
this fixes a broader bug for which a special case was reported by
Bruno Haible, in the form of %n getting processed (and reporting the
number of wide characters which would have been written, but weren't)
after an encoding error (EILSEQ). in addition to the %n case, some but
not all of the format specifiers continued to attempt output after an
error. in particular, %c, %lc, and %s all used fputwc directly without
any check for error status.
as long as the error condition was permanent rather than transient,
these write attempts had no visible side effects, but in theory it
could be visible, for example with EAGAIN/EWOULDBLOCK or ENOSPC, if
the condition precluding output came to an end. this could produce
output with missing non-final data, rather than just truncated output,
albeit with the function still returning -1 as expected to report an
error.
to fix this, a check is added to stop processing of any new directive
(including %n) if the stream is already in error state, and direct use
of fputwc is replaced with calls to the out() helper function, which
checks for error status.
note that fprintf is also used directly without checking error status,
but due to how commit
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| compat/time32 | ||
| crt | ||
| dist | ||
| include | ||
| ldso | ||
| src | ||
| tools | ||
| .gitignore | ||
| .mailmap | ||
| configure | ||
| COPYRIGHT | ||
| dynamic.list | ||
| INSTALL | ||
| Makefile | ||
| README | ||
| VERSION | ||
| WHATSNEW | ||
musl libc
musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.
The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.
For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:
http://www.musl-libc.org/