Date: Sun, 24 Oct 2010 20:45:13 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r214291 - in head: bin/sh tools/regression/bin/sh/parser Message-ID: <201010242045.o9OKjDCr039435@svn.freebsd.org>
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Author: jilles Date: Sun Oct 24 20:45:13 2010 New Revision: 214291 URL: http://svn.freebsd.org/changeset/base/214291 Log: sh: Make sure defined functions can actually be called. Add some conservative checks on function names: - Disallow expansions or quoting characters; these can only be called via strange control characters - Disallow '/'; these functions cannot be called anyway, as exec.c assumes they are pathnames - Make the CTL* bytes work properly in function names. These are syntax errors. POSIX does not require us to support more than names (letters, digits and underscores, not starting with a digit), but I do not want to restrict it that much at this time. Exp-run done by: pav (with some other sh(1) changes) Added: head/tools/regression/bin/sh/parser/func1.0 (contents, props changed) Modified: head/bin/sh/parser.c Modified: head/bin/sh/parser.c ============================================================================== --- head/bin/sh/parser.c Sun Oct 24 20:09:49 2010 (r214290) +++ head/bin/sh/parser.c Sun Oct 24 20:45:13 2010 (r214291) @@ -639,10 +639,14 @@ simplecmd(union node **rpp, union node * if (readtoken() != TRP) synexpect(TRP); funclinno = plinno; -#ifdef notdef - if (! goodname(n->narg.text)) + /* + * - Require plain text. + * - Functions with '/' cannot be called. + */ + if (!noexpand(n->narg.text) || quoteflag || + strchr(n->narg.text, '/')) synerror("Bad function name"); -#endif + rmescapes(n->narg.text); n->type = NDEFUN; n->narg.next = command(); funclinno = 0; Added: head/tools/regression/bin/sh/parser/func1.0 ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/regression/bin/sh/parser/func1.0 Sun Oct 24 20:45:13 2010 (r214291) @@ -0,0 +1,25 @@ +# $FreeBSD$ +# POSIX does not require these bytes to work in function names, +# but making them all work seems a good goal. + +failures=0 +unset LC_ALL +export LC_CTYPE=en_US.ISO8859-1 +i=128 +set -f +while [ "$i" -le 255 ]; do + c=$(printf \\"$(printf %o "$i")") + ok=0 + eval "$c() { ok=1; }" + $c + ok1=$ok + ok=0 + "$c" + if [ "$ok" != 1 ] || [ "$ok1" != 1 ]; then + echo "Bad results for character $i" >&2 + : $((failures += 1)) + fi + unset -f $c + i=$((i+1)) +done +exit $((failures > 0))
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