[PATCH] conditional remove of trailing sysfs whitespace

[elogind.git] / udev.h

diff --git a/udev.h b/udev.h
index fa56c366911a511e15fed9b2b5bb8e05633ad994..32fda379e54e467965bce37735580ab2540c6f92 100644 (file)
--- a/udev.h
+++ b/udev.h
@@ -85,12 +85,30 @@ do { \
        strncat(to, from, maxsize - strlen(to)-1); \
 } while (0)
 
+#define strintcat(to, i) \
+do { \
+       to[sizeof(to)-1] = '\0'; \
+       snprintf((to) + strlen(to), sizeof(to) - strlen(to)-1, "%u", i); \
+} while (0)
+
+#define strnintcat(to, i, maxsize) \
+do { \
+       to[maxsize-1] = '\0'; \
+       snprintf((to) + strlen(to), maxsize - strlen(to)-1, "%u", i); \
+} while (0)
+
+#define foreach_strpart(str, separator, pos, len) \
+       for(pos = str, len = 0; \
+           (pos) < ((str) + strlen(str)); \
+           pos = pos + len + strspn(pos, separator), len = strcspn(pos, separator)) \
+               if (len > 0)
+
 static inline char *get_action(void)
 {
        char *action;
 
        action = getenv("ACTION");
-       if (strlen(action) > ACTION_SIZE)
+       if (action != NULL && strlen(action) > ACTION_SIZE)
                action[ACTION_SIZE-1] = '\0';
 
        return action;
@@ -101,7 +119,7 @@ static inline char *get_devpath(void)
        char *devpath;
 
        devpath = getenv("DEVPATH");
-       if (strlen(devpath) > DEVPATH_SIZE)
+       if (devpath != NULL && strlen(devpath) > DEVPATH_SIZE)
                devpath[DEVPATH_SIZE-1] = '\0';
 
        return devpath;
@@ -118,7 +136,7 @@ static inline char *get_seqnum(void)
 
 static inline char *get_subsystem(char *subsystem)
 {
-       if (strlen(subsystem) > SUBSYSTEM_SIZE)
+       if (subsystem != NULL && strlen(subsystem) > SUBSYSTEM_SIZE)
                subsystem[SUBSYSTEM_SIZE-1] = '\0';
 
        return subsystem;