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author | Rich Felker <dalias@aerifal.cx> | 2015-09-09 04:31:07 +0000 |
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committer | Rich Felker <dalias@aerifal.cx> | 2015-09-09 04:31:07 +0000 |
commit | 426a0e2912c07f0e86feee2ed12f24a808eac2f4 (patch) | |
tree | c6c38c6d1fb8959d4614567c38c34da93228bae4 /arch | |
parent | d8be1bc0193f45d3900f8466f26d1411b7f919c3 (diff) | |
download | musl-426a0e2912c07f0e86feee2ed12f24a808eac2f4.tar.gz musl-426a0e2912c07f0e86feee2ed12f24a808eac2f4.tar.bz2 musl-426a0e2912c07f0e86feee2ed12f24a808eac2f4.tar.xz musl-426a0e2912c07f0e86feee2ed12f24a808eac2f4.zip |
fix fclose of permanent (stdin/out/err) streams
this fixes a bug reported by Nuno Gonçalves. previously, calling
fclose on stdin or stdout resulted in deadlock at exit time, since
__stdio_exit attempts to lock these streams to flush/seek them, and
has no easy way of knowing that they were closed.
conceptually, leaving a FILE stream locked on fclose is valid since,
in the abstract machine, it ceases to exist. but to satisfy the
implementation-internal assumption in __stdio_exit that it can access
these streams unconditionally, we need to unlock them.
it's also necessary that fclose leaves permanent streams in a state
where __stdio_exit will not attempt any further operations on them.
fortunately, the call to fflush already yields this property.
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions