X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fdir.cpp;h=29c24c188fa96b7d76763b9b1ab5ad4a8aa3de53;hp=212200d04918a368b11a0f64050c3ee49cef938e;hb=9c48f72f02e3112f4193cc8b3f12b135aa483de1;hpb=4dda68c467fe1e759e0d67e4ec844ac0130e6127

diff --git a/source/dir.cpp b/source/dir.cpp
index 212200d..29c24c1 100644
--- a/source/dir.cpp
+++ b/source/dir.cpp
@@ -14,6 +14,7 @@ Distributed under the LGPL
 #endif
 #include <msp/core/except.h>
 #include <msp/strings/regex.h>
+#include <msp/strings/utils.h>
 #include "dir.h"
 #include "path.h"
 #include "stat.h"
@@ -24,6 +25,44 @@ using namespace std;
 namespace Msp {
 namespace FS {
 
+namespace
+{
+
+/**
+Helper function to determine the location of the program's executable.  Caches
+the last result to cut down filesystem access with repeated calls.
+*/
+const Path &get_bin_dir(const string &argv0)
+{
+	static string last_argv0;
+	static Path bin_dir;
+
+	if(!(argv0==last_argv0))
+	{
+		Path exe;
+		if(argv0.find('/')==string::npos)
+		{
+			const char *path=getenv("PATH");
+			vector<string> dirs=split(path, ':');
+			for(vector<string>::const_iterator i=dirs.begin(); i!=dirs.end(); ++i)
+				if(exists(Path(*i)/argv0))
+				{
+					exe=realpath(Path(*i)/argv0);
+					break;
+				}
+		}
+		else
+			exe=realpath(argv0);
+
+		last_argv0=argv0;
+		bin_dir=dirname(exe);
+	}
+
+	return bin_dir;
+}
+
+}
+
 void mkdir(const Path &path, int mode)
 {
 	int err;
@@ -145,6 +184,31 @@ Path get_user_data_dir(const string &appname)
 #endif
 }
 
+Path get_sys_conf_dir(const string &argv0)
+{
+	Path dir=get_bin_dir(argv0);
+
+	if(dir[-1]=="bin" || dir[-1]=="sbin")
+	{
+		dir/="..";
+		if(dir[-1]=="usr")
+			dir/="..";
+		return dir/"etc";
+	}
+	else
+		return dir;
+}
+
+Path get_sys_data_dir(const string &argv0, const string &appname)
+{
+	Path dir=get_bin_dir(argv0);
+
+	if(dir[-1]=="bin" || dir[-1]=="sbin")
+		return dir/".."/"share"/appname;
+	else
+		return dir;
+}
+
 void chdir(const Path &path)
 {
 	if(::chdir(path.str().c_str())==-1)