glibc/sysdeps/unix/sysv/linux/gethostid.c
Ulrich Drepper 50304ef057 Update.
1998-07-16 10:23  Ulrich Drepper  <drepper@cygnus.com>

	* argp/argp-fmtstream.c: Unify names of used global functions.
	* argp/argp-help.c: Likewise.
	* assert/assert-perr.c: Likewise
	* assert/assert.c: Likewise
	* dirent/scandir.c: Likewise
	* dirent/scandir64.c: Likewise
	* dirent/versionsort.c: Likewise
	* dirent/versionsort64.c: Likewise
	* gmon/bb_exit_func.c: Likewise.
	* gmon/gmon.c: Likewise.
	* grp/initgroups.c: Likewise.
	* iconv/gconv_conf.c: Likewise.
	* inet/getnameinfo.c: Likewise.
	* inet/getnetgrent_r.c: Likewise.
	* inet/inet_ntoa.c: Likewise.
	* inet/rcmd.c: Likewise.
	* inet/rexec.c: Likewise.
	* inet/ruserpass.c: Likewise.
	* io/fts.c: Likewise.
	* io/ftw.c: Likewise.
	* io/ftw64.c: Likewise.
	* io/getdirname.c: Likewise.
	* io/getwd.c: Likewise.
	* io/lockf.c: Likewise.
	* libio/iofdopen.c: Likewise.
	* libio/iopopen.c: Likewise.
	* login/utmp_daemon.c: Likewise.
	* malloc/mtrace.c: Likewise.
	* malloc/obstack.c
	* misc/daemon.c: Likewise.
	* misc/efgcvt_r.c: Likewise.
	* misc/err.c: Likewise.
	* misc/error.c: Likewise.
	* misc/fstab.c: Likewise.
	* misc/getpass.c: Likewise.
	* misc/getttyent.c: Likewise.
	* misc/mntent_r.c: Likewise.
	* misc/search.h: Likewise.
	* misc/syslog.c: Likewise.
	* nscd/nscd_getgr_r.c: Likewise.
	* nscd/nscd_getpw_r.c: Likewise.
	* posix/getpgrp.c: Likewise.
	* posix/wordexp.c: Likewise.
	* pwd/fgetpwent_r.c: Likewise.
	* pwd/getpw.c: Likewise.
	* resolv/herror.c: Likewise.
	* resolv/res_init.c: Likewise.
	* shadow/fgetspent_r.c: Likewise.
	* shadow/lckpwdf.c: Likewise.
	* signal/sigrelse.c: Likewise.
	* stdio-common/asprintf.c: Likewise.
	* stdio-common/dprintf.c: Likewise.
	* stdio-common/getw.c: Likewise.
	* stdio-common/putw.c: Likewise.
	* stdio-common/snprintf.c: Likewise.
	* stdio-common/sprintf.c: Likewise.
	* stdio-common/sscanf.c: Likewise.
	* stdlib/lrand48_r.c: Likewise.
	* stdlib/mrand48_r.c: Likewise.
	* string/argz-replace.c: Likewise.
	* string/envz.c: Likewise.
	* sunrpc/auth_des.c: Likewise.
	* sunrpc/auth_unix.c: Likewise.
	* sunrpc/bindrsvprt.c: Likewise.
	* sunrpc/clnt_gen.c: Likewise.
	* sunrpc/clnt_perr.c: Likewise.
	* sunrpc/clnt_simp.c: Likewise.
	* sunrpc/clnt_tcp.c: Likewise.
	* sunrpc/clnt_udp.c: Likewise.
	* sunrpc/get_myaddr.c: Likewise.
	* sunrpc/key_call.c: Likewise.
	* sunrpc/netname.c: Likewise.
	* sunrpc/openchild.c: Likewise.
	* sunrpc/pmap_rmt.c: Likewise.
	* sunrpc/rpc_dtable.c: Likewise.
	* sunrpc/rtime.c: Likewise.
	* sunrpc/svc_run.c: Likewise.
	* sunrpc/svc_simple.c: Likewise.
	* sunrpc/svc_tcp.c: Likewise.
	* sunrpc/svc_udp.c: Likewise.
	* sunrpc/svcauth_des.c: Likewise.
	* sunrpc/xdr_array.c: Likewise.
	* sunrpc/xdr_rec.c: Likewise.
	* sunrpc/xdr_ref.c: Likewise.
	* sunrpc/xdr_stdio.c: Likewise.
	* sysdeps/generic/abort.c: Likewise.
	* sysdeps/generic/dl-sysdep.c: Likewise.
	* sysdeps/generic/fstatfs64.c: Likewise.
	* sysdeps/generic/ftruncate64.c: Likewise.
	* sysdeps/generic/getrlimit64.c: Likewise.
	* sysdeps/generic/glob.c: Likewise.
	* sysdeps/generic/prof-freq.c: Likewise.
	* sysdeps/generic/putenv.c: Likewise.
	* sysdeps/generic/statfs64.c: Likewise.
	* sysdeps/generic/ttyname_r.c: Likewise.
	* sysdeps/generic/utmp_file.c: Likewise.
	* sysdeps/generic/vlimit.c: Likewise.
	* sysdeps/generic/vtimes.c: Likewise.
	* sysdeps/posix/cuserid.c: Likewise.
	* sysdeps/posix/euidaccess.c: Likewise.
	* sysdeps/posix/mkstemp.c: Likewise.
	* sysdeps/posix/mktemp.c: Likewise.
	* sysdeps/posix/pread.c: Likewise.
	* sysdeps/posix/pread64.c: Likewise.
	* sysdeps/posix/profil.c: Likewise.
	* sysdeps/posix/pwrite.c: Likewise.
	* sysdeps/posix/pwrite64.c: Likewise.
	* sysdeps/posix/sigblock.c: Likewise.
	* sysdeps/posix/sigpause.c: Likewise.
	* sysdeps/posix/ttyname.c: Likewise.
	* sysdeps/posix/ttyname_r.c: Likewise.
	* sysdeps/posix/waitid.c: Likewise.
	* sysdeps/unix/getlogin_r.c: Likewise.
	* sysdeps/unix/grantpt.c: Likewise.
	* sysdeps/unix/rewinddir.c: Likewise.
	* sysdeps/unix/sysv/linux/gethostid.c: Likewise.
	* sysdeps/unix/sysv/linux/getpt.c: Likewise.
	* sysdeps/unix/sysv/linux/if_index.c: Likewise.
	* sysdeps/unix/sysv/linux/ptsname.c: Likewise.
	* sysdeps/unix/sysv/linux/sendmsg.c: Likewise.
	* sysdeps/unix/sysv/linux/statvfs.c: Likewise.
	* sysdeps/unix/sysv/linux/ttyname.c: Likewise.
	* sysdeps/unix/sysv/linux/ttyname_r.c: Likewise.
	* sysdeps/unix/sysv/linux/ulimit.c: Likewise.
	* sysdeps/unix/sysv/linux/unlockpt.c: Likewise.
	* sysvipc/sys/shm.h: Likewise.
	* time/ctime_r.c: Likewise.
	* time/strptime.c: Likewise.
	* wcsmbs/mbrlen.c: Likewise.
	* wcsmbs/wcsdup.c: Likewise.
	* wcsmbs/wcsxfrm.c: Likewise.
	* wctype/wcfuncs.c: Likewise.

	* sysdeps/unix/sysv/linux/i386/socker.S: Change to honor NO_WEAK_ALIAS.
	* sysdeps/unix/sysv/linux/accept.S: Don't generate __ name.
	* sysdeps/unix/sysv/linux/bind.S: Likewise.
	* sysdeps/unix/sysv/linux/getsockname.S: Likewise.
	* sysdeps/unix/sysv/linux/listen.S: Likewise.
	* sysdeps/unix/sysv/linux/recvfrom.S: Likewise.
	* sysdeps/unix/sysv/linux/sendto.S: Likewise.
	* sysdeps/unix/sysv/linux/setsockopt.S: Likewise.

	* grp/fgetgrent_r.c: Use explicit locking of the stream.

	* elf/Makefile (rtld-routines): Add dl-environ.
	* sysdeps/generic/dl-environ.c: New file.

	* libio/Makefile [REENTRANT] (routines): Add iofputs_u.
	* libio/Versions: Add fputs_unlocked.
	* libio/iofputs_u.c: New file.
	* libio/stdio.h: Add prototype for fputs_unlocked.

	* sunrpc/rpc/auth.h: Use __PMT instead of __P in type definitions.
	* sunrpc/rpc/clnt.h: Likewise.
	* sunrpc/rpc/pmap_clnt.h: Likewise.
	* sunrpc/rpc/svc.h: Likewise.
	* sunrpc/rpc/xdr.h: Likewise.

	* sysdeps/i386/memchr.S: Correct for more strict gas.
	* sysdeps/i386/fpu/bits/mathinline.h: Likewise.
	* sysdeps/libm-i387/i686/s_fdim.S: Likewise.
	* sysdeps/libm-i387/i686/s_fdimf.S: Likewise.
	* sysdeps/libm-i387/i686/s_fdiml.S: Likewise.

1998-07-15  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* configure.in: Change message for binutils version from
	2.8.1.0.17->2.8.1.0.23.

1998-07-15  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/sysv4/solaris2/sparc/sysdep.h: Define LOC.
	Patch by John Tobey <jtobey@banta-im.com>.
1998-07-16 11:44:36 +00:00

112 lines
2.8 KiB
C

/* Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <alloca.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#define HOSTIDFILE "/var/adm/hostid"
#ifdef SET_PROCEDURE
int
sethostid (id)
long int id;
{
int fd;
ssize_t written;
/* Test for appropriate rights to set host ID. */
if (__libc_enable_secure)
{
__set_errno (EPERM);
return -1;
}
/* Open file for writing. Everybody is allowed to read this file. */
fd = __open (HOSTIDFILE, O_CREAT|O_WRONLY, 0644);
if (fd < 0)
return -1;
written = __write (fd, &id, sizeof (id));
__close (fd);
return written != sizeof (id) ? -1 : 0;
}
#else
# include <string.h>
# include <sys/param.h>
# include <resolv/netdb.h>
# include <netinet/in.h>
long int
gethostid ()
{
char hostname[MAXHOSTNAMELEN + 1];
size_t buflen;
char *buffer;
struct hostent hostbuf, *hp;
unsigned long int id;
struct in_addr in;
int herr;
int fd;
/* First try to get the ID from a former invocation of sethostid. */
fd = __open (HOSTIDFILE, O_RDONLY);
if (fd >= 0)
{
ssize_t n = __read (fd, &id, sizeof (id));
__close (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)
if (herr != NETDB_INTERNAL || errno != ERANGE)
return 0;
else
{
/* Enlarge buffer. */
buflen *= 2;
buffer = __alloca (buflen);
}
in.s_addr = 0;
memcpy (&in, hp->h_addr,
(int) sizeof (in) < hp->h_length ? sizeof (in) : hp->h_length);
/* For the return value to be not exactly the IP address we do some
bit fiddling. */
return in.s_addr << 16 | in.s_addr >> 16;
}
#endif