X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Fstrv.h;h=e26ab828d2598922a1a2b2148d5d8624ea142988;hp=2dc2bc6c492bf6139a679896cdbaea10e7268102;hb=590b6b9188e75ba46c42995984a1c2fa06adb6d6;hpb=4de33e7f3238a6fe616e61139ab87e221572e5e5

diff --git a/src/shared/strv.h b/src/shared/strv.h
index 2dc2bc6c4..e26ab828d 100644
--- a/src/shared/strv.h
+++ b/src/shared/strv.h
@@ -39,7 +39,7 @@ unsigned strv_length(char * const *l) _pure_;
 int strv_extend_strv(char ***a, char **b);
 int strv_extend_strv_concat(char ***a, char **b, const char *suffix);
 int strv_extend(char ***l, const char *value);
-int strv_extendf(char ***l, const char *format, ...);
+int strv_extendf(char ***l, const char *format, ...) _printf_(2,0);
 int strv_push(char ***l, char *value);
 int strv_consume(char ***l, char *value);
 
@@ -119,3 +119,15 @@ void strv_print(char **l);
         })
 
 #define STR_IN_SET(x, ...) strv_contains(STRV_MAKE(__VA_ARGS__), x)
+
+#define FOREACH_STRING(x, ...)                               \
+        for (char **_l = ({                                  \
+                char **_ll = STRV_MAKE(__VA_ARGS__);         \
+                x = _ll ? _ll[0] : NULL;                     \
+                _ll;                                         \
+        });                                                  \
+        _l && *_l;                                           \
+        x = ({                                               \
+                _l ++;                                       \
+                _l[0];                                       \
+        }))