NAME

       enosys - utility make syscalls fail with ENOSYS

SYNOPSIS

       enosys [--syscall|-s syscall] command

DESCRIPTION

       enosys is a simple command to execute a child process for which certain syscalls fail with errno ENOSYS.

       It can be used to test the behavior of applications in the face of missing syscalls as would happen when
       running on old kernels.

OPTIONS

       -s, --syscall
           Syscall to block. Can be specified multiple times.

       -i, --ioctl
           Ioctl to block. Can be specified multiple times.

       -l, --list
           List syscalls known to enosys.

       -m, --list-ioctl
           List ioctls known to enosys.

       -h, --help
           Display help text and exit.

       -V, --version
           Print version and exit.

EXIT STATUS

       enosys exits with the status code of the executed process. The following values have special meanings:

       1
           internal error

       2
           system does not provide the necessary functionality

AUTHORS

       Thomas Weißschuh <thomas@t-8ch.de>

SEE ALSO

       syscall(2)

REPORTING BUGS

       For bug reports, use the issue tracker at https://github.com/util-linux/util-linux/issues.

AVAILABILITY

       The enosys command is part of the util-linux package which can be downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.40.2                                  2024-07-04                                          ENOSYS(1)