ramips: add switch port index for I-O DATA WN-GX300GR

[openwrt/openwrt.git] / scripts / bundle-libraries.sh

diff --git a/scripts/bundle-libraries.sh b/scripts/bundle-libraries.sh
index 08b52b9906c7421a8dd8bf8856876a8636d4dedd..620ee01bdedd6bc93ea3f763dea7ea860037a921 100755 (executable)
--- a/scripts/bundle-libraries.sh
+++ b/scripts/bundle-libraries.sh
@@ -1,9 +1,8 @@
 #!/usr/bin/env bash
 #
 #   Script to install host system binaries along with required libraries.
-#   Refer to the --help output for more information.
 #
-#   Copyright (C) 2012 Jo-Philipp Wich <jow@openwrt.org>
+#   Copyright (C) 2012-2017 Jo-Philipp Wich <jo@mein.io>
 #
 #   This program is free software; you can redistribute it and/or modify
 #   it under the terms of the GNU General Public License as published by
@@ -28,6 +27,13 @@ _cp() {
        }
 }
 
+_mv() {
+       mv ${VERBOSE:+-v} "$1" "$2" || {
+               echo "mv($1 $2) failed" >&2
+               exit 1
+       }
+}
+
 _md() {
        mkdir ${VERBOSE:+-v} -p "$1" || {
                echo "mkdir($1) failed" >&2
@@ -42,69 +48,133 @@ _ln() {
        }
 }
 
+_relpath() {
+       local base="$(readlink -f "$1")"
+       local dest="$(readlink -f "$2")"
+       local up
+
+       [ -d "$base" ] || base="${base%/*}"
+       [ -d "$dest" ] || dest="${dest%/*}"
+
+       while true; do
+               case "$base"
+                       in "$dest"/*)
+                               echo "$up/${base#$dest/}"
+                               break
+                       ;;
+                       *)
+                               dest="${dest%/*}"
+                               up="${up:+$up/}.."
+                       ;;
+               esac
+       done
+}
+
+_runas_so() {
+       cat <<-EOT | ${CC:-gcc} -x c -fPIC -shared -o "$1" -
+               #include <unistd.h>
+               #include <stdio.h>
+               #include <stdlib.h>
+
+               int mangle_arg0(int argc, char **argv, char **env) {
+                       char *arg0 = getenv("RUNAS_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
+
+       [ -x "$1" ] || {
+               echo "compiling preload library failed" >&2
+               exit 5
+       }
+}
+
+_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
+}
+
 for LDD in ${PATH//://ldd }/ldd; do
        "$LDD" --version >/dev/null 2>/dev/null && break
        LDD=""
 done
 
-[ -n "$LDD" -a -x "$LDD" ] || {
-       echo "Unable to find working ldd" >&2
-       exit 4
-}
+[ -n "$LDD" -a -x "$LDD" ] || LDD=
 
 for BIN in "$@"; do
-       [ -n "$BIN" -a -x "$BIN" -a -n "$DIR" ] || {
+       [ -n "$BIN" -a -n "$DIR" ] || {
                echo "Usage: $0 <destdir> <executable> ..." >&2
                exit 1
        }
 
-       [ ! -d "$DIR/bundled/lib" ] && {
-               _md "$DIR/bundled/lib"
-               _md "$DIR/bundled/usr"
-               _ln "../lib" "$DIR/bundled/usr/lib"
+       [ ! -d "$DIR/lib" ] && {
+               _md "$DIR/lib"
+               _md "$DIR/usr"
+               _ln "../lib" "$DIR/usr/lib"
        }
 
-       LDSO=""
-
-       echo "Bundling ${BIN##*/}"
-       for token in $("$LDD" "$BIN" 2>/dev/null); do
-               case "$token" in */*.so*)
-                       case "$token" in
-                               *ld-*.so*) LDSO="${token##*/}" ;;
-                               *) echo " * lib: ${token##*/}" ;;
-                       esac
-
-                       dest="$DIR/bundled/lib/${token##*/}"
-                       ddir="${dest%/*}"
+       [ ! -x "$DIR/lib/runas.so" ] && {
+               _runas_so "$DIR/lib/runas.so"
+       }
 
-                       [ -f "$token" -a ! -f "$dest" ] && {
-                               _md "$ddir"
-                               _cp "$token" "$dest"
-                       }
-               ;; esac
-       done
+       LDSO=""
 
-       _md "$DIR"
+       [ -n "$LDD" ] && [ -x "$BIN" ] && file "$BIN" | grep -sqE "ELF.*(executable|interpreter)" && {
+               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="${dest%/*}"
+
+                               [ -f "$token" -a ! -f "$dest" ] && {
+                                       _md "$ddir"
+                                       _cp "$token" "$dest"
+                                       [ -n "$LDSO" ] && _patch_ldso "$dest"
+                               }
+                       ;; esac
+               done
+       }
 
        # is a dynamically linked executable
        if [ -n "$LDSO" ]; then
-               _cp "$BIN" "$DIR/bundled/${BIN##*/}"
-
-               [ -x "$DIR/bundled/run.sh" ] || {
-                       cat <<-EOF > "$DIR/bundled/run.sh"
-                               #!/usr/bin/env bash
-                               dir="\$(dirname "\$0")"
-                               bin="\$(basename "\$0")"
-                               exec -a "\$0" "\$dir/bundled/lib/$LDSO" --library-path "\$dir/bundled/lib" "\$dir/bundled/\$bin" "\$@"
-                       EOF
-                       chmod ${VERBOSE:+-v} 0755 "$DIR/bundled/run.sh"
-               }
+               echo "Bundling ${BIN##*/}"
 
-               _ln "./bundled/run.sh" "$DIR/${BIN##*/}"
+               RUNDIR="$(readlink -f "$BIN")"; RUNDIR="${RUNDIR%/*}"
+               RUN="${LDSO#ld-}"; RUN="run-${RUN%%.so*}.sh"
+               REL="$(_relpath "$DIR/lib" "$BIN")"
 
-       # is a static executable or non-elf binary
-       else
-               echo " * not dynamically linked"
-               _cp "$BIN" "$DIR/${BIN##*/}"
+               _mv "$BIN" "$RUNDIR/.${BIN##*/}.bin"
+
+               cat <<-EOF > "$BIN"
+                       #!/usr/bin/env bash
+                       dir="\$(dirname "\$0")"
+                       export RUNAS_ARG0="\$0"
+                       export LD_PRELOAD="\$dir/${REL:+$REL/}runas.so"
+                       exec "\$dir/${REL:+$REL/}$LDSO" --library-path "\$dir/${REL:+$REL/}" "\$dir/.${BIN##*/}.bin" "\$@"
+               EOF
+
+               chmod ${VERBOSE:+-v} 0755 "$BIN"
        fi
 done