license: add GPLv2+ license blurbs everwhere

[elogind.git] / util.c

diff --git a/util.c b/util.c
index 4847310aee57d084d5009c0cf0132002ee260e8b..33b143d3bbcf225c9cc37df3a1206d642cbf4e9d 100644 (file)
--- a/util.c
+++ b/util.c
@@ -1,5 +1,24 @@
 /*-*- Mode: C; c-basic-offset: 8 -*-*/
 
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
 #include <assert.h>
 #include <string.h>
 #include <unistd.h>
@@ -10,6 +29,7 @@
 #include <syslog.h>
 #include <sched.h>
 #include <sys/resource.h>
+#include <linux/sched.h>
 
 #include "macro.h"
 #include "util.h"
@@ -566,10 +586,10 @@ int unhexchar(char c) {
                 return c - '0';
 
         if (c >= 'a' && c <= 'f')
-                return c - 'a';
+                return c - 'a' + 10;
 
         if (c >= 'A' && c <= 'F')
-                return c - 'A';
+                return c - 'A' + 10;
 
         return -1;
 }
@@ -803,6 +823,66 @@ char *xescape(const char *s, const char *bad) {
         return r;
 }
 
+char *bus_path_escape(const char *s) {
+        assert(s);
+
+        char *r, *t;
+        const char *f;
+
+        /* Escapes all chars that D-Bus' object path cannot deal
+         * with. Can be reverse with bus_path_unescape() */
+
+        if (!(r = new(char, strlen(s)*3+1)))
+                return NULL;
+
+        for (f = s, t = r; *f; f++) {
+
+                if (!(*f >= 'A' && *f <= 'Z') &&
+                    !(*f >= 'a' && *f <= 'z') &&
+                    !(*f >= '0' && *f <= '9')) {
+                        *(t++) = '_';
+                        *(t++) = hexchar(*f >> 4);
+                        *(t++) = hexchar(*f);
+                } else
+                        *(t++) = *f;
+        }
+
+        *t = 0;
+
+        return r;
+}
+
+char *bus_path_unescape(const char *s) {
+        assert(s);
+
+        char *r, *t;
+        const char *f;
+
+        if (!(r = new(char, strlen(s)+1)))
+                return NULL;
+
+        for (f = s, t = r; *f; f++) {
+
+                if (*f == '_') {
+                        int a, b;
+
+                        if ((a = unhexchar(f[1])) < 0 ||
+                            (b = unhexchar(f[2])) < 0) {
+                                /* Invalid escape code, let's take it literal then */
+                                *(t++) = '_';
+                        } else {
+                                *(t++) = (char) ((a << 4) | b);
+                                f += 2;
+                        }
+                } else
+                        *(t++) = *f;
+        }
+
+        *t = 0;
+
+        return r;
+}
+
 char *path_kill_slashes(char *path) {
         char *f, *t;
         bool slash = false;