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e957b67061
Valgrind detected a pipe fd leak before the parent exits on success, introduced in commit 4296cea; by itself, the leak is not bad, since we immediately called _exit(), but we might as well be clean to make valgrind analysis easier. Meanwhile, if the daemon grandchild detects an error, the parent failed to flush the error message before exiting. Also, we had the possibility of both parent and child returning to the caller, such that the user could see duplicated reports of failure from the two return paths. And we might as well be robust to the (unlikely) situation of being started with stdin closed. * daemon/libvirtd.c (daemonForkIntoBackground): Use exit if an error message was generated, avoid fd leaks for valgrind's sake, avoid returning to caller in both parent and child, and don't close a just-dup'd stdin. Based on a report by Alex Jia. * How to reproduce? % service libvirtd stop % valgrind -v --track-fds=yes /usr/sbin/libvirtd --daemon * Actual valgrind result: ==16804== FILE DESCRIPTORS: 7 open at exit. ==16804== Open file descriptor 7: ==16804== at 0x321FAD8B87: pipe (in /lib64/libc-2.12.so) ==16804== by 0x41F34D: daemonForkIntoBackground (libvirtd.c:186) ==16804== by 0x4207A0: main (libvirtd.c:1420) Signed-off-by: Alex Jia <ajia@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> |
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| .. | ||
| .gitignore | ||
| libvirtd.aug | ||
| libvirtd.c | ||
| libvirtd.conf | ||
| libvirtd.h | ||
| libvirtd.init.in | ||
| libvirtd.logrotate.in | ||
| libvirtd.lxc.logrotate.in | ||
| libvirtd.pod.in | ||
| libvirtd.policy-0 | ||
| libvirtd.policy-1 | ||
| libvirtd.qemu.logrotate.in | ||
| libvirtd.sasl | ||
| libvirtd.service.in | ||
| libvirtd.sysconf | ||
| libvirtd.sysctl | ||
| libvirtd.uml.logrotate.in | ||
| libvirtd.upstart | ||
| Makefile.am | ||
| remote.c | ||
| remote.h | ||
| stream.c | ||
| stream.h | ||
| test_libvirtd.aug | ||
| THREADS.txt | ||