From 2cb7e0aaedad73b076ea18c6900b0e86c5760d79 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 15:00:47 +0200 Subject: Adding upstream version 247.3. Signed-off-by: Daniel Baumann --- src/core/hostname-setup.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 src/core/hostname-setup.c (limited to 'src/core/hostname-setup.c') diff --git a/src/core/hostname-setup.c b/src/core/hostname-setup.c new file mode 100644 index 0000000..867ea19 --- /dev/null +++ b/src/core/hostname-setup.c @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include +#include +#include + +#include "alloc-util.h" +#include "fileio.h" +#include "hostname-setup.h" +#include "hostname-util.h" +#include "log.h" +#include "macro.h" +#include "proc-cmdline.h" +#include "string-util.h" +#include "util.h" + +int hostname_setup(void) { + _cleanup_free_ char *b = NULL; + const char *hn = NULL; + bool enoent = false; + int r; + + r = proc_cmdline_get_key("systemd.hostname", 0, &b); + if (r < 0) + log_warning_errno(r, "Failed to retrieve system hostname from kernel command line, ignoring: %m"); + else if (r > 0) { + if (hostname_is_valid(b, true)) + hn = b; + else { + log_warning("Hostname specified on kernel command line is invalid, ignoring: %s", b); + b = mfree(b); + } + } + + if (!hn) { + r = read_etc_hostname(NULL, &b); + if (r < 0) { + if (r == -ENOENT) + enoent = true; + else + log_warning_errno(r, "Failed to read configured hostname: %m"); + } else + hn = b; + } + + if (isempty(hn)) { + /* Don't override the hostname if it is already set and not explicitly configured */ + if (hostname_is_set()) + return 0; + + if (enoent) + log_info("No hostname configured."); + + hn = FALLBACK_HOSTNAME; + } + + r = sethostname_idempotent(hn); + if (r < 0) + return log_warning_errno(r, "Failed to set hostname to <%s>: %m", hn); + + log_info("Set hostname to <%s>.", hn); + return 0; +} -- cgit v1.2.3