UTIL: Remove code duplication of struct io

We had struct io and the associated destructor copied twice in the code
already and need it again in the SELinux provider. Instead of adding
another copy, move the code to a shared subtree under util/

Reviewed-by: Michal Židek <mzidek@redhat.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/src/util/child_common.c b/src/util/child_common.c
index 81bbab70e..e4a885b6e 100644
--- a/src/util/child_common.c
+++ b/src/util/child_common.c
@@ -772,3 +772,32 @@ void child_cleanup(int readfd, int writefd)
         }
     }
 }
+
+int child_io_destructor(void *ptr)
+{
+    int ret;
+    struct child_io_fds *io = talloc_get_type(ptr, struct child_io_fds);
+    if (io == NULL) return EOK;
+
+    if (io->write_to_child_fd != -1) {
+        ret = close(io->write_to_child_fd);
+        io->write_to_child_fd = -1;
+        if (ret != EOK) {
+            ret = errno;
+            DEBUG(SSSDBG_CRIT_FAILURE,
+                  "close failed [%d][%s].\n", ret, strerror(ret));
+        }
+    }
+
+    if (io->read_from_child_fd != -1) {
+        ret = close(io->read_from_child_fd);
+        io->read_from_child_fd = -1;
+        if (ret != EOK) {
+            ret = errno;
+            DEBUG(SSSDBG_CRIT_FAILURE,
+                  "close failed [%d][%s].\n", ret, strerror(ret));
+        }
+    }
+
+    return EOK;
+}
diff --git a/src/util/child_common.h b/src/util/child_common.h
index 95865bb52..261da7f9c 100644
--- a/src/util/child_common.h
+++ b/src/util/child_common.h
@@ -45,6 +45,11 @@ struct io_buffer {
     size_t size;
 };
 
+struct child_io_fds {
+    int read_from_child_fd;
+    int write_to_child_fd;
+};
+
 /* COMMON SIGCHLD HANDLING */
 typedef void (*sss_child_fn_t)(int pid, int wait_status, void *pvt);
 
@@ -113,4 +118,6 @@ errno_t exec_child(TALLOC_CTX *mem_ctx,
 
 void child_cleanup(int readfd, int writefd);
 
+int child_io_destructor(void *ptr);
+
 #endif /* __CHILD_COMMON_H__ */