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Dmitry Safonov 8f95747e00 criu-util: do not double free and simplify xvstrcat 
There is a bug, that if vsnprintf() wrote nothing to buffer:
that may be xstrcat(0, "%s", "") or something like that,
than vsnprintf's return value is 0, which will be lesser than
delta. The code before would do following:
o first cycle:
  1. relocate str to new (str is not allocated anymore)
  2. vsnprintf() retured 0, delta is greater.
o second cycle:
  1. relocate previously freed str to new..^C ^C
Segmentation fault (core dumped)

Weeell, I do think, we can do better job here.

Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
2016-08-01 16:51:33 +03:00
contrib Add OverlayFS support to docker_cr.sh 2015-08-18 18:14:32 +03:00
coredump coredump: Rename dir to coredump 2016-06-28 13:04:58 +03:00
crit crit/decode: set default opts['nopl'] to False 2016-05-30 13:47:54 +03:00
criu criu-util: do not double free and simplify xvstrcat 2016-08-01 16:51:33 +03:00
Documentation criu: fix some spelling errors in criu.txt 2016-06-28 13:12:59 +03:00
images ipc/sysctl: c/r fs.mqueue.msg_default fs.mqueue.msgsize_default 2016-08-01 16:51:33 +03:00
lib criu: almost fix building on Alpine Linux 2016-07-09 22:04:26 +03:00
scripts travis: run test/others/exec 2016-08-01 16:51:33 +03:00
test zdtm.py: check restore when criu dump runs over a non-root user 2016-08-01 16:51:33 +03:00
.gitignore uninstall: use --record with setup.py, v2 2016-05-06 14:38:29 +03:00
.mailmap repo: Add mailmap file 2012-03-25 23:31:20 +04:00
.travis.yml travis: build tests in a separate job 2016-08-01 16:51:05 +03:00
COPYING Add LGPL licence for library directory 2013-04-01 12:29:06 +04:00
CREDITS Add the CREDITS file 2012-07-30 13:52:37 +04:00
INSTALL.md build: Add INSTALL.md and update "make help" 2016-05-06 14:38:29 +03:00
Makefile zdtm: use flake8 to verify zdtm.py 2016-06-28 13:09:35 +03:00
Makefile.install autofs: install -- Ship scripts/systemd-autofs-restart.sh 2016-07-05 23:18:15 +03:00
Makefile.versions criu: Version 2.4 2016-07-11 13:43:45 +03:00
README.md Add ascciinema tour on basic criu features. 2016-06-16 16:37:06 +03:00

README.md

CRIU (Checkpoint and Restore in Userspace)

An utility to checkpoint/restore tasks. Using this tool, you can freeze a running application (or part of it) and checkpoint it to a hard drive as a collection of files. You can then use the files to restore and run the application from the point it was frozen at. The distinctive feature of the CRIU project is that it is mainly implemented in user space.

The project home is at http://criu.org.

Pages worth starting with are:

A video tour on basic CRIU features

CRIU introduction

How to contribute