--- /dev/null
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <wordexp.h>
+#include <lib/base/eenv.h>
+#include <lib/base/eerror.h>
+
+bool eEnv::initialized = false;
+
+void eEnv::initialize()
+{
+ static const struct {
+ std::string name;
+ std::string value;
+ } cfgenv[] = {
+ { "prefix", "@prefix@" },
+ { "exec_prefix", "@exec_prefix@" },
+ { "bindir", "@bindir@" },
+ { "sbindir", "@sbindir@" },
+ { "libexecdir", "@libexecdir@" },
+ { "datarootdir", "@datarootdir@" },
+ { "datadir", "@datadir@" },
+ { "sysconfdir", "@sysconfdir@" },
+ { "sharedstatedir", "@sharedstatedir@" },
+ { "localstatedir", "@localstatedir@" },
+ { "libdir", "@libdir@" },
+ { "localedir", "@localedir@" },
+ };
+ size_t i;
+
+ // 1st pass, as generated by configure.
+ // Variables set by the user will not be overwritten.
+ for (i = 0; i < (sizeof(cfgenv) / sizeof(*cfgenv)); i++) {
+ eDebug("setenv('%s', '%s', 0)", cfgenv[i].name.c_str(), cfgenv[i].value.c_str());
+ setenv(cfgenv[i].name.c_str(), cfgenv[i].value.c_str(), 0);
+ }
+
+ // 2nd pass: Resolve directories.
+ for (i = 0; i < (sizeof(cfgenv) / sizeof(*cfgenv)); i++) {
+ std::string dest;
+ eEnv::resolveVar(dest, "${" + cfgenv[i].name + "}");
+ eDebug("setenv('%s', '%s', 1)", cfgenv[i].name.c_str(), dest.c_str());
+ setenv(cfgenv[i].name.c_str(), dest.c_str(), 1);
+ }
+}
+
+int eEnv::resolveVar(std::string &dest, const char *src)
+{
+ size_t i = 0;
+ int ret;
+ wordexp_t p;
+
+ ret = wordexp(src, &p, WRDE_NOCMD | WRDE_UNDEF);
+ if (ret != 0) {
+ switch (ret) {
+ case WRDE_BADCHAR:
+ eDebug("%s: bad character", __func__);
+ break;
+ case WRDE_BADVAL:
+ eDebug("%s: bad value", __func__);
+ break;
+ case WRDE_CMDSUB:
+ eDebug("%s: invalid command substitution", __func__);
+ break;
+ case WRDE_NOSPACE:
+ eDebug("%s: out of memory", __func__);
+ break;
+ case WRDE_SYNTAX:
+ eDebug("%s: syntax error", __func__);
+ break;
+ default:
+ eDebug("%s: unknown error", __func__);
+ break;
+ }
+
+ return -1;
+ }
+
+ while (i < p.we_wordc) {
+ if (strchr(p.we_wordv[i], '$')) {
+ ret = eEnv::resolveVar(dest, p.we_wordv[i]);
+ if (ret < 0)
+ break;
+ } else {
+ dest.append(p.we_wordv[i]);
+ }
+
+ if (++i < p.we_wordc)
+ dest.append(" ");
+ }
+
+ wordfree(&p);
+ return ret;
+}
+
+int eEnv::resolveVar(std::string &dest, const std::string &src)
+{
+ return eEnv::resolveVar(dest, src.c_str());
+}
+
+std::string eEnv::resolve(const std::string &src)
+{
+ std::string dest;
+
+ if (!initialized) {
+ eEnv::initialize();
+ initialized = true;
+ }
+
+ eDebug("%s: resolve %s", __func__, src.c_str());
+
+ eEnv::resolveVar(dest, src);
+
+ eDebug("%s: -> %s", __func__, dest.c_str());
+
+ return dest;
+}