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#endif |
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#endif |
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#include "virhostuptime.h" |
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#include "virhostuptime.h" |
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#include "viralloc.h" |
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#include "virfile.h" |
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#include "virlog.h" |
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#include "virstring.h" |
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#include "virtime.h" |
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#include "virthread.h" |
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#include "virthread.h" |
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#define VIR_FROM_THIS VIR_FROM_NONE |
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VIR_LOG_INIT("util.virhostuptime"); |
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static unsigned long long bootTime; |
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static unsigned long long bootTime; |
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static int bootTimeErrno; |
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static int bootTimeErrno; |
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static virOnceControl virHostGetBootTimeOnce = VIR_ONCE_CONTROL_INITIALIZER; |
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static virOnceControl virHostGetBootTimeOnce = VIR_ONCE_CONTROL_INITIALIZER; |
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#ifdef HAVE_GETUTXID |
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#if defined(__linux__) |
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# define UPTIME_FILE "/proc/uptime" |
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static int |
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virHostGetBootTimeProcfs(unsigned long long *btime) |
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{ |
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unsigned long long now; |
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double up; |
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VIR_AUTOFREE (char *buf) = NULL; |
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char *tmp; |
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if (virTimeMillisNow(&now) < 0) |
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return -errno; |
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/* 1KiB limit is more than enough. */ |
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if (virFileReadAll(UPTIME_FILE, 1024, &buf) < 0) |
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return -errno; |
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/* buf contains two doubles now: |
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* $uptime $idle_time |
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* We're interested only in the first one */ |
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if (!(tmp = strchr(buf, ' '))) { |
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virReportError(VIR_ERR_INTERNAL_ERROR, |
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_("uptime file has unexpected format '%s'"), |
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buf); |
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return -EINVAL; |
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} |
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*tmp = '\0'; |
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if (virStrToDouble(buf, NULL, &up) < 0) { |
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virReportError(VIR_ERR_INTERNAL_ERROR, |
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_("Unable to parse sched info value '%s'"), |
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buf); |
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return -EINVAL; |
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} |
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*btime = now / 1000 - up + 0.5; |
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return 0; |
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} |
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#endif /* defined(__linux__) */ |
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#if defined(HAVE_GETUTXID) || defined(__linux__) |
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static void |
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static void |
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virHostGetBootTimeOnceInit(void) |
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virHostGetBootTimeOnceInit(void) |
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{ |
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{ |
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# ifdef HAVE_GETUTXID |
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struct utmpx id = {.ut_type = BOOT_TIME}; |
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struct utmpx id = {.ut_type = BOOT_TIME}; |
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struct utmpx *res = NULL; |
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struct utmpx *res = NULL; |
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} |
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} |
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endutxent(); |
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endutxent(); |
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# endif /* HAVE_GETUTXID */ |
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if (bootTimeErrno != 0 || bootTimeErrno == 0) { |
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bootTimeErrno = -virHostGetBootTimeProcfs(&bootTime); |
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} |
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} |
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} |
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#else /* !HAVE_GETUTXID */ |
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#else /* !defined(HAVE_GETUTXID) && !defined(__linux__) */ |
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static void |
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static void |
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virHostGetBootTimeOnceInit(void) |
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virHostGetBootTimeOnceInit(void) |
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{ |
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{ |
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bootTimeErrno = ENOSYS; |
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bootTimeErrno = ENOSYS; |
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} |
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} |
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#endif /* HAVE_GETUTXID */ |
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#endif /* !defined(HAVE_GETUTXID) && !defined(__linux__) */ |
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/** |
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/** |
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* virHostGetBootTime: |
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* virHostGetBootTime: |
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- |
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