From e1908ae95dd4c9d19ee4dfabfc8bf8a7f85943fe Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 18:58:41 +0200 Subject: Adding upstream version 9.4. Signed-off-by: Daniel Baumann --- src/hostid.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 src/hostid.c (limited to 'src/hostid.c') diff --git a/src/hostid.c b/src/hostid.c new file mode 100644 index 0000000..79f83b3 --- /dev/null +++ b/src/hostid.c @@ -0,0 +1,85 @@ +/* print the hexadecimal identifier for the current host + + Copyright (C) 1997-2023 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +/* Written by Jim Meyering. */ + +#include +#include +#include + +#include "system.h" +#include "long-options.h" +#include "quote.h" + +/* The official name of this program (e.g., no 'g' prefix). */ +#define PROGRAM_NAME "hostid" + +#define AUTHORS proper_name ("Jim Meyering") + +void +usage (int status) +{ + if (status != EXIT_SUCCESS) + emit_try_help (); + else + { + printf (_("\ +Usage: %s [OPTION]\n\ +Print the numeric identifier (in hexadecimal) for the current host.\n\ +\n\ +"), program_name); + fputs (HELP_OPTION_DESCRIPTION, stdout); + fputs (VERSION_OPTION_DESCRIPTION, stdout); + emit_ancillary_info (PROGRAM_NAME); + } + exit (status); +} + +int +main (int argc, char **argv) +{ + unsigned int id; + + initialize_main (&argc, &argv); + set_program_name (argv[0]); + setlocale (LC_ALL, ""); + bindtextdomain (PACKAGE, LOCALEDIR); + textdomain (PACKAGE); + + atexit (close_stdout); + + parse_gnu_standard_options_only (argc, argv, PROGRAM_NAME, PACKAGE_NAME, + Version, true, usage, AUTHORS, + (char const *) nullptr); + + if (optind < argc) + { + error (0, 0, _("extra operand %s"), quote (argv[optind])); + usage (EXIT_FAILURE); + } + + id = gethostid (); + + /* POSIX says gethostid returns a "32-bit identifier" but is silent + whether it's sign-extended. Turn off any sign-extension. This + is a no-op unless unsigned int is wider than 32 bits. */ + id &= 0xffffffff; + + printf ("%08x\n", id); + + return EXIT_SUCCESS; +} -- cgit v1.2.3