src/basic/generate-errno-list.sh - systemd - Git at Google

 #!/usr/bin/env bash
 # SPDX-License-Identifier: LGPL-2.1-or-later
 set -eu
 set -o pipefail

 # In kernel's arch/parisc/include/uapi/asm/errno.h, ECANCELLED and EREFUSED are defined as aliases of
 # ECANCELED and ECONNREFUSED, respectively. Let's drop them.

 ${1:?} -dM -include errno.h - </dev/null | \
        grep -Ev '^#define[[:space:]]+(ECANCELLED|EREFUSED)' | \
        awk '/^#define[ \t]+E[^ _]+[ \t]+/ { print $2; }'
	#!/usr/bin/env bash
	# SPDX-License-Identifier: LGPL-2.1-or-later
	set -eu
	set -o pipefail

	# In kernel's arch/parisc/include/uapi/asm/errno.h, ECANCELLED and EREFUSED are defined as aliases of
	# ECANCELED and ECONNREFUSED, respectively. Let's drop them.

	${1:?} -dM -include errno.h - </dev/null \| \
	grep -Ev '^#define[[:space:]]+(ECANCELLED\|EREFUSED)' \| \
	awk '/^#define[ \t]+E[^ _]+[ \t]+/ { print $2; }'