opnsense-src/bin/sh/tests/execution/shellproc6.0

# $FreeBSD$

T=`mktemp -d "${TMPDIR:-/tmp}/sh-test.XXXXXXXX"` || exit
trap 'rm -rf "${T}"' 0
printf 'printf "this "\necho is a test\nexit\n\0' >"$T/testshellproc"
chmod 755 "$T/testshellproc"
PATH=$T:$PATH
[ "`testshellproc`" = "this is a test" ]
sh: Allow more scripts without #! Austin Group bugs #1226 and #1250 changed the requirements for shell scripts without #! (POSIX does not specify #!; this is about the shell execution when execve(2) returns an [ENOEXEC] error). POSIX says we shall allow execution if the initial part intended to be parsed by the shell consists of characters and does not contain the NUL character. This allows concatenating a shell script (ending with exec or exit) and a binary payload. In order to reject common binary files such as PNG images, check that there is a lowercase letter or expansion before the last newline before the NUL character, in addition to the check for the newline character suggested by POSIX. 2020-05-30 12:00:49 -04:00			`# $FreeBSD$`

			T=`mktemp -d "${TMPDIR:-/tmp}/sh-test.XXXXXXXX"` \|\| exit
			`trap 'rm -rf "${T}"' 0`
			`printf 'printf "this "\necho is a test\nexit\n\0' >"$T/testshellproc"`
			`chmod 755 "$T/testshellproc"`
			`PATH=$T:$PATH`
			[ "`testshellproc`" = "this is a test" ]