On 6/14/19 4:28 PM, Bruno Haible wrote: > Tim Rühsen wrote: >> Do you think it makes more sense to open a bug at busybox then ? > > I don't think so. Execution of scripts without shebang is considered > legacy. Quoting <https://en.wikipedia.org/wiki/Shebang_(Unix)> : > > "Note that, even in systems with full kernel support for the #! magic > number, > some scripts lacking interpreter directives (although usually still > requiring execute permission) are still runnable by virtue of the legacy > script handling of the Bourne shell, still present in many of its modern > descendants. Scripts are then interpreted by the user's default shell." >
Conversely, POSIX requires that execution by 'sh' is the expected behavior when #! is missing, and that use of #! renders a script non-portable: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_01 "The shell reads its input from a file (see sh), from the -c option or from the system() and popen() functions defined in the System Interfaces volume of POSIX.1-2017. If the first line of a file of shell commands starts with the characters "#!", the results are unspecified." -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
