On Wed, Aug 14, 2019 at 16:33:22 +0200, Michal Privoznik wrote: > This module contains function to get host boot time. > > Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx> > --- > src/libvirt_private.syms | 4 +++ > src/util/Makefile.inc.am | 2 ++ > src/util/virhostuptime.c | 61 ++++++++++++++++++++++++++++++++++++++++ > src/util/virhostuptime.h | 27 ++++++++++++++++++ > 4 files changed, 94 insertions(+) > create mode 100644 src/util/virhostuptime.c > create mode 100644 src/util/virhostuptime.h > > diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms > index 7a3feb8efa..bed00c3cb8 100644 > --- a/src/libvirt_private.syms > +++ b/src/libvirt_private.syms > @@ -2135,6 +2135,10 @@ virHostMemGetStats; > virHostMemSetParameters; > > > +# util/virhostuptime.h > +virHostGetBootTime; > + > + > # util/viridentity.h > virIdentityGetAttr; > virIdentityGetCurrent; > diff --git a/src/util/Makefile.inc.am b/src/util/Makefile.inc.am > index a47f333a98..46866cf213 100644 > --- a/src/util/Makefile.inc.am > +++ b/src/util/Makefile.inc.am > @@ -91,6 +91,8 @@ UTIL_SOURCES = \ > util/virhostdev.h \ > util/virhostmem.c \ > util/virhostmem.h \ > + util/virhostuptime.c \ > + util/virhostuptime.h \ > util/viridentity.c \ > util/viridentity.h \ > util/virinitctl.c \ > diff --git a/src/util/virhostuptime.c b/src/util/virhostuptime.c > new file mode 100644 > index 0000000000..f48de672e6 > --- /dev/null > +++ b/src/util/virhostuptime.c > @@ -0,0 +1,61 @@ > +/* > + * virhostuptime.c: helper APIs for host uptime > + * > + * Copyright (C) 2019 Red Hat, Inc. > + * > + * This 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. > + * > + * This 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 this library. If not, see > + * <http://www.gnu.org/licenses/>. > + */ > + > +#include <config.h> > + > +#if defined(__linux__) || defined(__FreeBSD__) > +# include <utmpx.h> > +#endif > + > +#include "virhostuptime.h" > + > + > +/** > + * virHostGetBootTime: > + * @when: UNIX timestamp of boot time > + * > + * Get a UNIX timestamp of host boot time and store it at @when. > + * Note that this function is not reentrant. > + * > + * Return: 0 on success, > + * -1 otherwise. > + */ > +int > +virHostGetBootTime(unsigned long long *when ATTRIBUTE_UNUSED) > +{ > +#if defined(__linux__) || defined(__FreeBSD__) I believe we usually use a bit different approach: #if ... int virHostGetBootTime(unsigned long long *when) { ... } #else int virHostGetBootTime(unsigned long long *when ATTRIBUTE_UNUSED) { return ...; } #endif > + struct utmpx id = {.ut_type = BOOT_TIME}; > + struct utmpx *res = NULL; > + > + if (!(res = getutxid(&id))) { getutxid is not thread safe > + int theerrno = errno; > + endutxent(); > + return -theerrno; > + } > + > + *when = res->ut_tv.tv_sec; > + endutxent(); > + return 0; > +#else > + /* Unfortunately, mingw lacks utmp */ > + errno = ENOSYS; > + return -errno; > +#endif > +} Jirka -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
