[libvirt] [PATCH] util:Fix with process number and pid file do not match

From: dubobo <dubobo(a)didichuxing.com&gt; the libvirtd pid file is not match the os process pid number which is smaller than before. this would be exist if the libvirtd process coredump or the os process was killed which the next pid number is smaller. you can be also edit the pid file to write the longer number than before,then restart the libvirtd service. Signed-off-by: dubobo <dubobo(a)didichuxing.com&gt; --- src/util/virpidfile.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/util/virpidfile.c b/src/util/virpidfile.c index 58ab29f..8b0ff99 100644 --- a/src/util/virpidfile.c +++ b/src/util/virpidfile.c @@ -445,6 +445,12 @@ int virPidFileAcquirePath(const char *path, } snprintf(pidstr, sizeof(pidstr), "%lld", (long long) pid); + if (ftruncate(fd, 0) < 0) { + VIR_FORCE_CLOSE(fd); + return -1; + } + + lseek(fd, 0, SEEK_SET); if (safewrite(fd, pidstr, strlen(pidstr)) < 0) { virReportSystemError(errno, -- 1.8.3.1