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Editorial Team
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Asked: 2026-05-13T15:55:00+00:00

I am using the POSIX call nftw() for traversing a directory structure. The directory

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I am using the POSIX call nftw() for traversing a directory structure. The directory structure is flat – only 4 files and no subdirectories.

However when I call nftw() a lot of times on this flat directory then I get an error message after a while:

"too many open file handles".

It turned out that this happens when the flag FTW_CHDIR is used.

Would you agree that it is a bug in the Linux implementation of nftw() ?

UPDATE

A fix is now available in the glibc repositories.

here are some links to the source code I have used for testing:

UPDATE

  • MacOS-X is also hit by the bug
  • Solaris9, Solaris10 and AIX 5.3 do not have the bug
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1 Answer

  1. Editorial Team

    For me it looks like there is really something wrong with the nftw implementation on linux.

    I have filed a bug report, see here

    UPDATE: A fix is available in the glibc repositories now.

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