[Bug 5156] fclose and fflush do not report write failures

bugzilla at busybox.net bugzilla at busybox.net
Sun Nov 22 15:46:57 UTC 2015


--- Comment #2 from stefanct <stefan.tauner at gmx.at> 2015-11-22 15:46:56 UTC ---
This (together with the fact that fwrite() reports to succeed in writing the
requested number of bytes) causes real world applications to fail to even
notice that there is a problem and produce corrupt user data.

My test case is writing a regular file to a full vfat file system on Linux.
MUSL and glibc report the problem already at fwrite() time while uclibc does
not report any problem in fwrite() nor fclose(). This is a disastrous bug.

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