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Replace fork by posix_spawn in mount_util.c #902

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Replace fork by posix_spawn in mount_util.c #902

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Commits on Mar 13, 2024

  1. Replace fork by posix_spawn in mount_util.c 

    This completes commit bb9cecb
("Use posix_spawn instead of fork+exec") and replaces remaining
fork by posix_spawn.

Not modified is mount_bsd.d as I cannot test it.
    @bsbernd
    bsbernd committed Mar 13, 2024
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  2. Add "FUSE_NO_MTAB_UPDATE" env to disable mtab updates 

    This adds the env FUSE_NO_MTAB_UPDATE variable to be able
to disable mtab updates without recompiling libfuse.
The value needs to be set to 1.

This is an addition to commit 74b1df2, which removed
a check for mtab updates, if mtab is a symlink.
Although not related to the symlink, this caused a regression
in our code, as the symlink update was done through fork.
The env variable is a run time workaround for such cases and
to avoid the requirement to disable mtab updates at libfuse
configuration/compilation time.
    @bsbernd
    bsbernd committed Mar 13, 2024
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