strv.c: add strv_to_env for use with execle, etc.

Reviewed-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Signed-off-by: Trever L. Adams <trever.adams@gmail.com>

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Fri Oct 14 01:44:02 CEST 2016 on sn-devel-144

2 files changed, 27 insertions, 0 deletions

diff --git a/lib/util/strv.c b/lib/util/strv.c
index 577cd4da983..99ce76f54fd 100644
--- a/lib/util/strv.c
+++ b/lib/util/strv.c
@@ -155,3 +155,29 @@ void strv_delete(char **strv, char *entry)
 
 	*strv = talloc_realloc(NULL, *strv, char, len - entry_len);
 }
+
+char * const *strv_to_env(TALLOC_CTX *mem_ctx, char *strv)
+{
+       char **data;
+       char *next = NULL;
+       size_t i;
+       size_t count = strv_count(strv);
+
+       if (strv == NULL) {
+               return NULL;
+       }
+
+       data = talloc_array(mem_ctx, char *, count + 1);
+
+       if (data == NULL) {
+               return NULL;
+       }
+
+       for(i = 0; i < count; i++) {
+               next = strv_next(strv, next);
+               data[i] = next;
+       }
+       data[count] = NULL;
+
+       return data;
+}
diff --git a/lib/util/strv.h b/lib/util/strv.h
index a3fe7ab3c5a..398e8ead171 100644
--- a/lib/util/strv.h
+++ b/lib/util/strv.h
@@ -29,5 +29,6 @@ char *strv_next(char *strv, const char *entry);
 char *strv_find(char *strv, const char *entry);
 size_t strv_count(char *strv);
 void strv_delete(char **strv, char *entry);
+char * const *strv_to_env(TALLOC_CTX *mem_ctx, char *strv);
 
 #endif