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glibc July 2020

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sys_errlist / fork-safe perror
by Richard W.M. Jones 17 Jul '20

17 Jul '20

In libnbd we use sys_errlist[] to make a perror function that is safe to call after fork and before exec: https://github.com/libguestfs/libnbd/blob/a6ba108309d9250e5f7fe0a5d41a996b7… It looks as if glibc removed this list, which is annoying. Two questions: (1) How can we write a fork-safe perror function? (2) Why is the configure not working (it detects that sys_errlist is still available)? https://github.com/libguestfs/libnbd/blob/a6ba108309d9250e5f7fe0a5d41a996b7… Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html

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