int mangle_arg0(int argc, char **argv, char **env) {
char *arg0 = getenv("RUNAS_ARG0");
- if (arg0)
+ if (arg0) {
argv[0] = arg0;
+ unsetenv("RUNAS_ARG0");
+ }
return 0;
}
+ #ifdef __APPLE__
+ __attribute__((section("__DATA,__mod_init_func")))
+ #else
__attribute__((section(".init_array")))
+ #endif
static void *mangle_arg0_constructor = &mangle_arg0;
EOT
}
}
+_patch_ldso() {
+ _cp "$1" "$1.patched"
+ sed -i -e 's,/\(usr\|lib\|etc\)/,/###/,g' "$1.patched"
+
+ if "$1.patched" 2>&1 | grep -q -- --library-path; then
+ _mv "$1.patched" "$1"
+ else
+ echo "binary patched ${1##*/} not executable, using original" >&2
+ rm -f "$1.patched"
+ fi
+}
+
+_patch_glibc() {
+ _cp "$1" "$1.patched"
+ sed -i -e 's,/usr/\(\(lib\|share\)/locale\),/###/\1,g' "$1.patched"
+
+ if "$1.patched" 2>&1 | grep -q -- GNU; then
+ _mv "$1.patched" "$1"
+ else
+ echo "binary patched ${1##*/} not executable, using original" >&2
+ rm -f "$1.patched"
+ fi
+}
+
+should_be_patched() {
+ local bin="$1"
+
+ [ -x "$bin" ] || return 1
+
+ case "$bin" in
+ *.so|*.so.[0-9]*)
+ return 1
+ ;;
+ *)
+ file "$bin" | grep -sqE "ELF.*(executable|interpreter)" && return 0
+ ;;
+ esac
+
+ return 1
+}
+
for LDD in ${PATH//://ldd }/ldd; do
"$LDD" --version >/dev/null 2>/dev/null && break
LDD=""
LDSO=""
- [ -n "$LDD" ] && [ -x "$BIN" ] && file "$BIN" | grep -sqE "ELF.*(executable|interpreter)" && {
+ [ -n "$LDD" ] && should_be_patched "$BIN" && {
for token in $("$LDD" "$BIN" 2>/dev/null); do
case "$token" in */*.so*)
- case "$token" in
- *ld-*.so*) LDSO="${token##*/}" ;;
- esac
-
dest="$DIR/lib/${token##*/}"
ddir="${dest%/*}"
+ case "$token" in
+ */ld-*.so*) LDSO="${token##*/}" ;;
+ esac
+
[ -f "$token" -a ! -f "$dest" ] && {
_md "$ddir"
_cp "$token" "$dest"
+ case "$token" in
+ */ld-*.so*) _patch_ldso "$dest" ;;
+ */libc.so.6) _patch_glibc "$dest" ;;
+ esac
}
;; esac
done
#!/usr/bin/env bash
dir="\$(dirname "\$0")"
export RUNAS_ARG0="\$0"
- export LD_PRELOAD="\$dir/${REL:+$REL/}runas.so"
+ export LD_PRELOAD="\${LD_PRELOAD:+\$LD_PRELOAD:}\$dir/${REL:+$REL/}runas.so"
exec "\$dir/${REL:+$REL/}$LDSO" --library-path "\$dir/${REL:+$REL/}" "\$dir/.${BIN##*/}.bin" "\$@"
EOF