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Diffstat (limited to 'sysdeps/unix/sysv/linux/gethostid.c')
-rw-r--r--sysdeps/unix/sysv/linux/gethostid.c118
1 files changed, 0 insertions, 118 deletions
diff --git a/sysdeps/unix/sysv/linux/gethostid.c b/sysdeps/unix/sysv/linux/gethostid.c
deleted file mode 100644
index cc108aa2d6..0000000000
--- a/sysdeps/unix/sysv/linux/gethostid.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/* Copyright (C) 1995-2017 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <alloca.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <netdb.h>
-#include <not-cancel.h>
-
-#define HOSTIDFILE "/etc/hostid"
-
-#ifdef SET_PROCEDURE
-int
-sethostid (long int id)
-{
- int fd;
- ssize_t written;
- int32_t id32 = id;
-
- /* Test for appropriate rights to set host ID. */
- if (__libc_enable_secure)
- {
- __set_errno (EPERM);
- return -1;
- }
-
- /* Make sure the ID is not too large. Needed for bi-arch support. */
- if (id32 != id)
- {
- __set_errno (EOVERFLOW);
- return -1;
- }
-
- /* Open file for writing. Everybody is allowed to read this file. */
- fd = open_not_cancel (HOSTIDFILE, O_CREAT|O_WRONLY|O_TRUNC, 0644);
- if (fd < 0)
- return -1;
-
- written = write_not_cancel (fd, &id32, sizeof (id32));
-
- close_not_cancel_no_status (fd);
-
- return written != sizeof (id32) ? -1 : 0;
-}
-
-#else
-# include <string.h>
-# include <sys/param.h>
-# include <resolv/netdb.h>
-# include <netinet/in.h>
-
-long int
-gethostid (void)
-{
- char hostname[MAXHOSTNAMELEN + 1];
- size_t buflen;
- char *buffer;
- struct hostent hostbuf, *hp;
- int32_t id;
- struct in_addr in;
- int herr;
- int fd;
-
- /* First try to get the ID from a former invocation of sethostid. */
- fd = open_not_cancel (HOSTIDFILE, O_RDONLY|O_LARGEFILE, 0);
- if (fd >= 0)
- {
- ssize_t n = read_not_cancel (fd, &id, sizeof (id));
-
- close_not_cancel_no_status (fd);
-
- if (n == sizeof (id))
- return id;
- }
-
- /* Getting from the file was not successful. An intelligent guess for
- a unique number of a host is its IP address. Return this. */
- if (__gethostname (hostname, MAXHOSTNAMELEN) < 0 || hostname[0] == '\0')
- /* This also fails. Return and arbitrary value. */
- return 0;
-
- buflen = 1024;
- buffer = __alloca (buflen);
-
- /* To get the IP address we need to know the host name. */
- while (__gethostbyname_r (hostname, &hostbuf, buffer, buflen, &hp, &herr)
- != 0
- || hp == NULL)
- if (herr != NETDB_INTERNAL || errno != ERANGE)
- return 0;
- else
- /* Enlarge buffer. */
- buffer = extend_alloca (buffer, buflen, 2 * buflen);
-
- in.s_addr = 0;
- memcpy (&in, hp->h_addr,
- (int) sizeof (in) < hp->h_length ? (int) sizeof (in) : hp->h_length);
-
- /* For the return value to be not exactly the IP address we do some
- bit fiddling. */
- return (int32_t) (in.s_addr << 16 | in.s_addr >> 16);
-}
-#endif