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src/genhostid.c
51 строка
2 KB
David Kaspar [Dee'Kej]
src/genhostid.c: deprecation warning added
01 июн 2018, 15:51
01 июн 2018, 15:51
8e30047
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/* Copyright (C) 2003-2007 Red Hat, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2, * as published by the Free Software Foundation. * * 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, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ #include <fcntl.h> #include <stdlib.h> #include <time.h> #include <unistd.h> #include <sys/stat.h> #include <stdio.h> int main (void) { struct stat st; long int n; fprintf(stderr, "warning: genhostid is now deprecated, and will be removed in the near future!\n" "warning: use systemd-machine-id-setup (1) instead! More info: 'man 5 machine-id'\n"); /* * NOTE: gethostid() always returns 32-bit identifier, and st_size field * of stat structure represents total size of file, in bytes. */ if (stat ("/etc/hostid", &st) == 0 && S_ISREG (st.st_mode) && st.st_size == 4) { return 0; } int fd = open ("/dev/random", O_RDONLY); if (fd == -1 || read (fd, &n, sizeof (n)) != sizeof (n)) { srand48 ((long int) time (NULL) ^ (long int) getpid ()); n = lrand48 (); } return sethostid ((int32_t) n); }