enosys.1

ENOSYS

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXIT STATUS
AUTHORS
SEE ALSO
REPORTING BUGS
AVAILABILITY

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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/>.

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