summaryrefslogtreecommitdiffstats
path: root/man/sd_bus_error-example.c
blob: abea13ca45180b2a24315e14e4138369422e979c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
/* SPDX-License-Identifier: CC0-1.0 */

#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);
}