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-rw-r--r--lib/util/write_data.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/util/write_data.c b/lib/util/write_data.c
new file mode 100644
index 0000000..82f3aca
--- /dev/null
+++ b/lib/util/write_data.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+
+#include "util.h"
+
+int write_data(const char *errstr, int fd, const void *data, size_t size)
+{
+ ssize_t ret;
+
+ while (size > 0) {
+ ret = write(fd, data, size);
+ if (ret == 0) {
+ fprintf(stderr, "%s: write truncated\n", errstr);
+ return -1;
+ }
+ if (ret < 0) {
+ if (errno == EINTR)
+ continue;
+ perror(errstr);
+ return -1;
+ }
+
+ data = (const char *)data + ret;
+ size -= ret;
+ }
+
+ return 0;
+}