Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/man/sd_bus_error-example.c b/man/sd_bus_error-example.c
new file mode 100644
index 0000000..9b162eb
--- /dev/null
+++ b/man/sd_bus_error-example.c
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: MIT-0 */
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sd-bus.h>
+
+int writer_with_negative_errno_return(int fd, sd_bus_error *error) {
+  const char *message = "Hello, World!\n";
+
+  ssize_t n = write(fd, message, strlen(message));
+  if (n >= 0)
+    return n; /* On success, return the number of bytes written, possibly 0. */
+
+  /* On error, initialize the error structure, and also propagate the errno
+   * value that write(2) set for us. */
+  return sd_bus_error_set_errnof(error, errno, "Failed to write to fd %i: %m", fd);
+}