X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=util.c;h=b54c24a3dcd9efaecbe70ddb39efe8129b3eabd7;hp=3ce506b0c64f6265e173ab4af3dbf10899300835;hb=ef886c6ab86436f0d8b5128799a8f801c62d859a;hpb=1dccbe197cc480c1f161f967d180cbc3cc3d2d66

diff --git a/util.c b/util.c
index 3ce506b0c..b54c24a3d 100644
--- a/util.c
+++ b/util.c
@@ -10,6 +10,7 @@
 #include <syslog.h>
 #include <sched.h>
 #include <sys/resource.h>
+#include <linux/sched.h>
 
 #include "macro.h"
 #include "util.h"
@@ -88,6 +89,25 @@ bool startswith(const char *s, const char *prefix) {
         return memcmp(s, prefix, pl) == 0;
 }
 
+bool first_word(const char *s, const char *word) {
+        size_t sl, wl;
+
+        assert(s);
+        assert(word);
+
+        sl = strlen(s);
+        wl = strlen(word);
+
+        if (sl < wl)
+                return false;
+
+        if (memcmp(s, word, wl) != 0)
+                return false;
+
+        return (s[wl] == 0 ||
+                strchr(WHITESPACE, s[wl]));
+}
+
 int close_nointr(int fd) {
         assert(fd >= 0);
 
@@ -547,10 +567,10 @@ 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;
 }
@@ -784,6 +804,66 @@ 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;