SID-02486: backuprestore [cgid:error] error spawning CGI child

Status:	Answered	TWiki version:	6.1.0	Perl version:	5.26.3
Category:	BackupRestorePlugin	Server OS:	Rocky Linux 8.5	Last update:	4 years ago

Environment Rocky Linux 8.5 (RedHat); TWiki 6.1.0; selinux disabled;

[cgid:error] [pid 5166:tid 140621859780352] [client x.x.x.x:6006] AH01241: error spawning CGI child:exec of '/var/www/html/twiki/bin/backuprestore' failed (No such file or directory): /var/www/html/twiki/bin/backuprestore, referer: http://x.x.x.x/twiki/bin/view/TWiki/BackupRestoreConsole?action=create_backup
[Mon Dec 27 23:35:18.351696 2021] [cgid:error] [pid 2029:tid 140622102972160] [client x.x.x.x:6002] End of script output before headers: backuprestore, referer: http://x.x.x.x/twiki/bin/view/TWiki/BackupRestoreConsole?action=create_backup

Script/Plugin does exist and owned by apache

-rwxr-xr-x.  1 apache apache  2066 Jul 15  2018 backuprestore

Changed the backup destination of /tmp to another directory owned by apache

[root@OS1 bin]# perl backuprestore create_backup

works.

Note: I need to restore a backup created on TWiki-5.1 to TWiki-6.0 new install using the BackupRestore plugin

-- Liviu Voina - 2021-12-28

Discussion and Answer

Not sure.Check if the shibang line in your backuprestore script points to a proper perl executable, default: #!/usr/bin/perl -w

Check also that the script does not have Windows line endings, wch can happen if you use FTP to copy the files. If needed run it through dos2unix.

-- Peter Thoeny - 2021-12-29

Thank you Peter. The backuprestore script on TWiki-6.1.0 has the following shebang line

#!/ms/dist/perl5/bin/perl5.26.1 -w

Adding #!/usr/bin/perl -w on top of the above line will make the script run but I get these:

[Fri Dec 31 03:04:09 2021] backuprestore: cannot unlink file for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki-version.txt: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot restore permissions to 0100644 for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki-version.txt: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot unlink file for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki.conf: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot restore permissions to 0100644 for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki.conf: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot unlink file for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki-version-short-6.1.txt: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot restore permissions to 0100644 for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki-version-short-6.1.txt: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot unlink file for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/LocalSite.cfg: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot restore permissions to 0100644 for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/LocalSite.cfg: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot unlink file for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/LocalLib.cfg: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot restore permissions to 0100644 for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/LocalLib.cfg: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot unlink file for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki-version-long-TWiki-6.1.0.txt: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot restore permissions to 0100644 for /var/www/html/twiki/working/work_areas/BackupRestorePlugin/twiki-version-long-TWiki-6.1.0.txt: Permission denied at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
[Fri Dec 31 03:04:09 2021] backuprestore: cannot remove directory for /var/www/html/twiki/working/work_areas/BackupRestorePlugin: Directory not empty at /var/www/html/twiki/lib/TWiki/Plugins/BackupRestorePlugin/Core.pm line 655.
ERROR: Can't copy /var/www/html/twiki/bin/LocalLib.cfg to /var/www/html/twiki/working/work_areas/BackupRestorePlugin
ERROR: Can't copy /var/www/html/twiki/lib/LocalSite.cfg to /var/www/html/twiki/working/work_areas/BackupRestorePlugin
ERROR: Can't copy /etc/httpd/conf.d/twiki.conf to /var/www/html/twiki/working/work_areas/BackupRestorePlugin

-- Liviu Voina - 2021-12-31

The folder BackupRestorePlugin is owned by root:root and changed to apache:apache and it works now

[X work_areas]# chmod -R apache:apache BackupRestorePlugin

/var/www/html/twiki/working/work_areas

[X work_areas]# ls -al
total 36
drwxr-xr-x. 8 apache apache 4096 Dec 31 03:21 .
drwxr-xr-x. 5 apache apache 4096 Jul 15  2018 ..
drwxr-xr-x  2 apache apache 4096 Dec 31 03:21 BackupRestorePlugin
drwxr-xr-x  2 apache apache 4096 Dec 30 05:44 CoreStatistics
drwxr-xr-x  2 root   root   4096 Dec 29 02:46 MailerContrib
-r--r--r--. 1 apache apache  192 Jul 15  2018 README
drwxr-xr-x. 2 apache apache 4096 Dec 27 20:39 SetGetPlugin
drwxr-xr-x. 2 apache apache 4096 Dec 27 20:39 TagMePlugin
drwxr-xr-x. 2 apache apache 4096 Dec 31 02:29 VarICON

-- Liviu Voina - 2021-12-31

Yes, all files and directories below /var/www/html/twiki should be owned by apache:apache.

-- Peter Thoeny - 2022-01-10

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