settime.c

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Author : Eric Blake
Date : 2009-09-02 17:06:43
Hash : 9de26050
Message : errno: use consistently * lib/c-stack.c (ENOTSUP): <errno.h> guarantees a definition. * lib/canonicalize-lgpl.c (ENAMETOOLONG): Likewise. * lib/canonicalize.c (ELOOP): Likewise. * lib/inet_ntop.c (EAFNOSUPPORT): Likewise. * lib/inet_pton.c (EAFNOSUPPORT): Likewise. * lib/lchown.c (EOPNOTSUPP): Likewise. * lib/openat-priv.h (ENOSYS, EOPNOTSUPP): Likewise. * lib/savewd.c (ESTALE): Likewise. * lib/settime.c (ENOSYS): Likewise. * lib/utimens.c (ENOSYS): Likewise. * lib/xgethostname.c (ENAMETOOLONG): Likewise. * lib/chdir-safer.c (ELOOP): Likewise. (chdir_no_follow): Use HAVE_READLINK, not ELOOP, as witness. * modules/c-stack (Depends-on): Add errno. * modules/canonicalize (Depends-on): Likewise. * modules/chdir-safer (Depends-on): Likewise. * modules/fdopendir (Depends-on): Likewise. * modules/inet_ntop (Depends-on): Likewise. * modules/inet_pton (Depends-on): Likewise. * modules/lchown (Depends-on): Likewise. * modules/openat (Depends-on): Likewise. * modules/savewd (Depends-on): Likewise. * modules/settime (Depends-on): Likewise. * m4/chdir-safer.m4 (gl_CHDIR_SAFER): Check for readlink. Signed-off-by: Eric Blake <ebb9@byu.net>

lib/settime.c

/* settime -- set the system clock

   Copyright (C) 2002, 2004, 2005, 2006, 2007, 2009 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 <http://www.gnu.org/licenses/>.  */

/* Written by Paul Eggert.  */

#include <config.h>

#include "timespec.h"

#include <sys/time.h>
#include <unistd.h>

#include <errno.h>

/* Set the system time.  */

int
settime (struct timespec const *ts)
{
#if defined CLOCK_REALTIME && HAVE_CLOCK_SETTIME
  {
    int r = clock_settime (CLOCK_REALTIME, ts);
    if (r == 0 || errno == EPERM)
      return r;
  }
#endif

#if HAVE_SETTIMEOFDAY
  {
    struct timeval tv;

    tv.tv_sec = ts->tv_sec;
    tv.tv_usec = ts->tv_nsec / 1000;
    return settimeofday (&tv, 0);
  }
#elif HAVE_STIME
  /* This fails to compile on OSF1 V5.1, due to stime requiring
     a `long int*' and tv_sec is `int'.  But that system does provide
     settimeofday.  */
  return stime (&ts->tv_sec);
#else
  errno = ENOSYS;
  return -1;
#endif
}

kc3-lang/gnulib/lib/settime.c

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kc3-lang/gnulib /lib/settime.c