[gentoo-commits] proj/gentoo-functions:master commit in: /

["Sam James" <sam@gentoo.org>]

commit:     e650022a1291ab98efd2af02a4c83c395e2d5fa1
Author:     Kerin Millar <kfm <AT> plushkava <DOT> net>
AuthorDate: Tue Feb 14 00:29:41 2023 +0000
Commit:     Sam James <sam <AT> gentoo <DOT> org>
CommitDate: Tue Feb 14 03:39:49 2023 +0000
URL:        https://gitweb.gentoo.org/proj/gentoo-functions.git/commit/?id=e650022a

Validate the exit status given to veend() and vewend() as an argument

Presently, both functions trust that the first argument is either empty
or a valid exit status code. If given a bogus value, the call to return
may cause sh(1) to unceremoniously exit, as demonstrated below.

$ dash -c 'return junk; echo done'
dash: 1: return: Illegal number: junk

Instead, validate that the argument is an integer whose value is greater
than or equal to 0. Should validation fail, a diagnostic mesage will be
printed to STDERR and the return value will be 0, provided that the call
to print succeeded.

Signed-off-by: Kerin Millar <kfm <AT> plushkava.net>
Signed-off-by: Sam James <sam <AT> gentoo.org>

 functions.sh | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/functions.sh b/functions.sh
index a5d6502..28764d8 100644
--- a/functions.sh
+++ b/functions.sh
@@ -346,8 +346,10 @@ veend()
 {
 	if yesno "${EINFO_VERBOSE}"; then
 		eend "$@"
+	elif [ "$#" -gt 0 ] && { ! is_int "$1" || [ "$1" -lt 0 ]; }; then
+		printf 'Invalid argument given to veend (the exit status code must be an integer >= 0)\n' >&2
 	else
-		return "${1:-0}"
+		return "$1"
 	fi
 }
 
@@ -355,8 +357,10 @@ vewend()
 {
 	if yesno "${EINFO_VERBOSE}"; then
 		ewend "$@"
+	elif [ "$#" -gt 0 ] && { ! is_int "$1" || [ "$1" -lt 0 ]; }; then
+		printf 'Invalid argument given to vewend (the exit status code must be an integer >= 0)\n' >&2
 	else
-		return "${1:-0}"
+		return "$1"
 	fi
 }