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-rw-r--r--system/musl/ldconfig196
1 files changed, 181 insertions, 15 deletions
diff --git a/system/musl/ldconfig b/system/musl/ldconfig
index ccf7c2aa4..7699c6722 100644
--- a/system/musl/ldconfig
+++ b/system/musl/ldconfig
@@ -1,18 +1,184 @@
-#!/bin/sh
-scan_dirs() {
- scanelf -qS "$@" | while read SONAME FILE; do
- TARGET="${FILE##*/}"
- LINK="${FILE%/*}/$SONAME"
- case "$FILE" in
- /lib/*|/usr/lib/*|/usr/local/lib/*) ;;
- *) [ -h "$LINK" -o ! -e "$LINK" ] && ln -sf "$TARGET" "$LINK"
- esac
+#!/bin/sh -eu
+# Copyright 2016-2018 Samuel Holland <samuel@sholland.org>
+# SPDX-License-Identifier: 0BSD
+
+ME=${0##*/}
+VERSION=0.2.0
+
+echo() {
+ printf '%s\n' "$*"
+}
+
+echo_lines() {
+ printf '%s\n' "$@"
+}
+
+msg() {
+ printf >&2 '%s: %s\n' "$ME" "$*"
+}
+
+musl_arch() {
+ $ROOT/usr/lib/libc.so |& sed -n 's/^musl libc (\(.*\))$/\1/p'
+}
+
+musl_version() {
+ $ROOT/usr/lib/libc.so |& sed -n 's/^Version //p'
+}
+
+read_ldso_conf() {
+ local conf="$*" d dir file glob line
+
+ # Start with the default "trusted" directories
+ set -- /lib /usr/lib
+ for file in $conf; do
+ test -r "$file" || continue
+ $VERBOSE && msg "Reading ${file}"
+ while read -r line; do
+ line=$(tokenize ${line%%#*})
+ if test "${line#include }" != "$line"; then
+ glob=${file%/*}/${line#include }
+ $VERBOSE && msg "Including ${glob}"
+ line=$(read_ldso_conf $glob)
+ fi
+ for dir in $line; do
+ # Ignore missing directories
+ test -d "$ROOT$dir" || continue
+ # Ignore duplicate directories
+ for d; do test "$d" = "$dir" && continue 2; done
+ set -- "$@" "$dir"
+ done
+ done < "$file"
done
- return 0
+
+ echo_lines "$@"
+}
+
+tokenize() {
+ echo "$*" | sed 's/=libc[456]//g;y/:,/ /' | xargs
}
-# eat ldconfig options
-while getopts "nNvXvf:C:r:" opt; do
- :
+
+LDSO_CACHE="/etc/ld.so.cache"
+LDSO_CONF="/etc/ld.so.conf"
+LIBRARY_MODE=false
+ONLYARG_MODE=false
+PRINT_CACHE=false
+PRINT_VERSION=false
+ROOT=
+UPDATE_CACHE=true
+UPDATE_LINKS=true
+VERBOSE=false
+
+while getopts ":c:C:Df:ilnNpr:vVX" OPTION; do
+ case "$OPTION" in
+ C)
+ LDSO_CACHE=$OPTARG
+ ;;
+ D)
+ UPDATE_CACHE=false
+ UPDATE_LINKS=false
+ ;;
+ f)
+ LDSO_CONF=$OPTARG
+ ;;
+ l)
+ LIBRARY_MODE=true
+ ;;
+ n)
+ ONLYARG_MODE=true
+ ;;
+ N)
+ UPDATE_CACHE=false
+ ;;
+ p)
+ PRINT_CACHE=true
+ ;;
+ r)
+ ROOT=$OPTARG
+ if ! test -x $ROOT/usr/lib/libc.so; then
+ msg "${ROOT} does not appear to be a valid root directory"
+ exit 1
+ fi
+ ;;
+ v)
+ VERBOSE=true
+ ;;
+ V)
+ PRINT_VERSION=true
+ ;;
+ X)
+ UPDATE_LINKS=false
+ ;;
+ c|i)
+ msg "Ignored option -${OPTION}"
+ ;;
+ \?)
+ msg "Invalid option -${OPTARG}"
+ cat >&2 <<- EOF
+ Usage: $ME [-DnNvX] [-C cache] [-f conf] [-r root] [dir...]
+ $ME [-v] -l lib...
+ $ME [-v] [-C cache] [-r root] -p
+ $ME -V
+ EOF
+ exit 1
+ ;;
+ esac
done
-shift $(( $OPTIND - 1 ))
-[ $# -gt 0 ] && scan_dirs "$@"
+shift $((OPTIND-1))
+
+BANNER="ldconfig ${VERSION} for musl $(musl_version)"
+LDSO_CACHE="$ROOT$LDSO_CACHE"
+LDSO_CONF="$ROOT$LDSO_CONF"
+LDSO_PATH="$ROOT/etc/ld-musl-$(musl_arch).path"
+LDSO_PATH_TMP="$LDSO_PATH.$$"
+
+if $PRINT_VERSION; then
+ echo "$BANNER"
+ exit 0
+elif $PRINT_CACHE; then
+ test -r "$LDSO_PATH" && cat "$LDSO_PATH"
+ exit 0
+fi
+
+$VERBOSE && echo "$BANNER"
+
+if $LIBRARY_MODE; then
+ for lib; do
+ soname=$(scanelf -qS "$ROOT$lib")
+ soname=${soname%% *}
+ done
+ exit 0
+fi
+
+# Update musl's list of library paths
+if ! test -w "${LDSO_PATH%/*}"; then
+ msg "You do not have permission to update ${LDSO_PATH}"
+ exit 0
+fi
+trap 'rm -f "$LDSO_PATH_TMP"' EXIT
+read_ldso_conf "$LDSO_CONF" > "$LDSO_PATH_TMP"
+$VERBOSE && msg "Writing ${LDSO_PATH}"
+mv "$LDSO_PATH_TMP" "$LDSO_PATH"
+trap - EXIT
+
+# Read the updated list of library paths
+$ONLYARG_MODE || set -- "$@" $(cat "$LDSO_PATH")
+
+if $UPDATE_LINKS; then
+ for dir; do
+ # Packages are responsible for libraries in these directories
+ if test "$dir" = /lib || test "$dir" = /usr/lib; then
+ continue
+ fi
+ $VERBOSE && msg "Scanning ${ROOT}${dir}"
+ scanelf -qS "$ROOT$dir" | while read soname file; do
+ link=${file%/*}/$soname
+ test -f "$link" && continue
+ $VERBOSE && msg "Creating link ${link}"
+ ln -fns "${file##*/}" "$link"
+ done
+ done
+fi
+
+if $UPDATE_CACHE && test $# -gt 0; then
+ touch "$ROOT$LDSO_CACHE"
+fi