# System Directories
This page describes file system structure for various OI versions. This information may be helpful when debugging.
# OI-Win System Directories
| Path | Description |
|---|---|
| c:\oiroot\ | Base directory for OI Runtime system files. |
| c:\oiroot\oi\ | OI application storage location - default directory for OI application selection. |
| c:\oiroot\tmp\ | Directory for temporary storage of files during runtime. |
| c:\oiroot\tmp\oi_stat | Performance statistics for OI Runtime. |
| c:\oiroot\tmp\app\ | Directory for temporary storage of files related to the current application. |
| c:\oiroot\var\ | Parent of log directory. |
| c:\oiroot\var\log | Log files for OI runtime system events. |
# OI System directories HW v2.2 (oi1.10 and oi1.11)
| Path | Description | Volatile | Non-volatile | Read Only |
|---|---|---|---|---|
| /home/root | symlink→ /var/volatile/root | ✔ | ||
| /media | ✔ | |||
| /media/data | Internal data flash. USB mass storage device with partition label 'oi-data' is mounted here. | ✔ | ||
| /media/data | Data card (if present) | ✔ | ||
| /media/data/oidata | OI applications. | ✔ | ||
| /media/data/oidata/hdd | Internal hard disk is mounted here. | ✔ | ||
| /media/data/www | Web pages accessible by http://touch_screen_ip | ✔ | ||
| /media/hdd | Internal hard disk | ✔ | ||
| /media/hdd | Internal hard disk (if present) | ✔ | ||
| /media/hdd/db | Database files | ✔ | ||
| /media/hdd/oidata | OI applications | ✔ | ||
| /media/hdd/www | Web pages accessible by http://touch_screen_ip if internal data flash is missing | ✔ | ||
| /media/system | Internal system flash. System boots from here. | ✔ | ||
| /media/usbhd | External data flash. USB mass storage device is mounted here (partition label may not be 'oi-data'). | ✔ | ||
| /oi | symlink→ /var/run/oi | ✔ | ||
| /oi | OI application files on data card | ✔ | ||
| /oi/hdd | OI application files on hard drive. | ✔ | ||
| /tmp | symlink→ /var/tmp | ✔ | ||
| /tmp | Ram disk | ✔ | ||
| /tmp/db/sqlite | SQLite database files (non-volatile if hard drive is present; volatile with no hard drive or if forced to store into ramdisk in /etc/formfactor/machconfig) | ✔ | ✔ | |
| /var/defaultconfig | This is unpacked into /var/volatile/config on boot if stored configuration is not found in /media/system/config.squashfs | ✔ | ✔ | |
| /var/log | symlink→ /var/volatile/log | ✔ | ||
| /var/oi | ✔ | ✔ | ||
| /var/oi/demoapp | OI demo applications | ✔ | ✔ | |
| /var/oi/www | Web pages | ✔ | ✔ | |
| /var/oi/www/js | accessible by http://touch_screen_ip/fw/js/ | ✔ | ✔ | |
| /var/oi/www/php | accessible by http://touch_screen_ip/fw/php/ | ✔ | ✔ | |
| /var/oi/www/php_cli | accessible by http://touch_screen_ip/fw/php_cli provides scripts to test XML-RPC tag communication | ✔ | ✔ | |
| /var/oidata | read only directory | ✔ | ||
| /var/oidata/hdd | If internal data flash is missing: oidata directory from internal hard disk is mounted here | ✔ | ||
| /var/run | symlink→ /var/volatile/run | ✔ | ||
| /var/tmp | symlink→ /var/volatile/tmp | ✔ | ||
| /var/volatile | ✔ | |||
| /var/volatile/config | Configuration which can be stored (in OI Config Screen or using freeze.sh command from console) into non-volatile memory (/media/system/config.squashfs). During boot the content of /media/system/config.squashfs is unpacked here. /media/system/config.squashfs can be also unpacked here by thaw.sh command form console. | ✔ | ||
| /var/volatile/log | System log directory /var/log. OI logs here as well. | ✔ | ||
| /var/volatile/root | System home directory /home/root. | ✔ | ||
| /var/volatile/run | System run-time variable data directory /var/run. | ✔ | ||
| /var/volatile/run/oi | If internal data flash is present: symlink→ /media/data/oidata | ✔ | ||
| /var/volatile/run/oi | If internal data flash is not present: symlink→ /var/oidata | ✔ | ||
| /var/volatile/tmp | System temporary directory /tmp. | ✔ | ||
| /var/volatile/tmp/app | OI application run-time files | ✔ | ||
| /var/volatile/tmp/app/httpscripts | OI application's http script files. Accessible by http://touch_screen_ip/app/ | ✔ | ||
| /var/volatile/tmp/app/shellscripts | OI application's shell script files | ✔ | ||
| /var/volatile/tmp/config | symlink→ /var/volatile/config | ✔ | ||
| /var/volatile/tmp/db | Database files are stored here if hard disk is not present (or database is forced to store its data into ram disk in /etc/formfactor/machconfig, STORE_DB_ON_RAMDISK setting) or symlink→ /media/hdd/db if hard disk is present | ✔ | ||
| /var/volatile/tmp/db/sqlite | SQLite database files | ✔ | ||
| /var/volatile/tmp/sqlite | symlink→ /tmp/db/sqlite (it is here to keep compatibility within oi1.10. This symlink will not exist in oi1.11/fw2.4) | ✔ | ||
| /var/volatile/tmp/www | Web pages are stored here if there is no non-volatile storage (hard disk or data flash) or symlink→ /media/data/www. Accessible by http://touch_screen_ip | ✔ |
# OI System directories HW v2.0, HW v2.1 (oi1.9)
| Path | Description | Volatile | Non-volatile | Read Only |
|---|---|---|---|---|
| /home/root | symlink→ /var/volatile/root | ✔ | ||
| /media | ✔ | |||
| /media/data | Internal data flash. USB mass storage device with partition label 'oi-data' is mounted here. | ✔ | ||
| /media/data | Data card (if present) | ✔ | ||
| /media/data/oidata | OI applications. | ✔ | ||
| /media/data/oidata/hdd | Internal hard disk is mounted here. | ✔ | ||
| /media/data/www | Web pages accessible by http://touch_screen_ip | ✔ | ||
| /media/hdd | Internal hard disk | ✔ | ||
| /media/hdd | Internal hard disk (if present) | ✔ | ||
| /media/hdd/db | Database files | ✔ | ||
| /media/hdd/oidata | OI applications | ✔ | ||
| /media/hdd/www | Web pages accessible by http://touch_screen_ip if internal data flash is missing | ✔ | ||
| /media/system | Internal system flash. System boots from here. | ✔ | ||
| /media/usbhd | External data flash. USB mass storage device is mounted here (partition label may not be 'oi-data'). | ✔ | ||
| /oi | symlink→ /var/run/oi | ✔ | ||
| /oi | OI application files on data card | ✔ | ||
| /oi/hdd | OI application files on hard drive. | ✔ | ||
| /tmp | symlink→ /var/tmp | ✔ | ||
| /tmp | Ram disk | ✔ | ||
| /tmp/db/pgsql | PostGresql database files (non-volatile if hard drive is present; volatile with no hard drive or if forced to store into ramdisk in /etc/formfactor/machconfig) | ✔ | ✔ | |
| /var/defaultconfig | This is unpacked into /var/volatile/config on boot if stored configuration is not found in /media/system/config.squashfs | ✔ | ✔ | |
| /var/lib/oi | ✔ | ✔ | ||
| /var/lib/oi/demoapp | OI demo applications | ✔ | ✔ | |
| /var/lib/oi/www | Web pages | ✔ | ✔ | |
| /var/lib/oi/www/js | accessible by http://touch_screen_ip/fw/js/ | ✔ | ✔ | |
| /var/lib/oi/www/php | accessible by http://touch_screen_ip/fw/php/ | ✔ | ✔ | |
| /var/log | symlink→ /var/volatile/log | ✔ | ||
| /var/oidata | read only directory | ✔ | ||
| /var/oidata/hdd | If internal data flash is missing: oidata directory from internal hard disk is mounted here | ✔ | ||
| /var/run | symlink→ /var/volatile/run | ✔ | ||
| /var/tmp | symlink→ /var/volatile/tmp | ✔ | ||
| /var/volatile | ✔ | |||
| /var/volatile/config | Configuration which can be stored (in OI Config Screen or using freeze.sh command from console) into non-volatile memory (/media/system/config.squashfs). During boot the content of /media/system/config.squashfs is unpacked here. /media/system/config.squashfs can be also unpacked here by thaw.sh command form console. | ✔ | ||
| /var/volatile/log | System log directory /var/log. OI logs here as well. | ✔ | ||
| /var/volatile/root | System home directory /home/root. | ✔ | ||
| /var/volatile/run | System run-time variable data directory /var/run. | ✔ | ||
| /var/volatile/run/oi | If internal data flash is present: symlink→ /media/data/oidata | ✔ | ||
| /var/volatile/run/oi | If internal data flash is not present: symlink→ /var/oidata | ✔ | ||
| /var/volatile/tmp | System temporary directory /tmp. | ✔ | ||
| /var/volatile/tmp/app | OI application run-time files | ✔ | ||
| /var/volatile/tmp/app/httpscripts | OI application's http script files. Accessible by http://touch_screen_ip/app/ | ✔ | ||
| /var/volatile/tmp/app/shellscripts | OI application's shell script files | ✔ | ||
| /var/volatile/tmp/config | symlink→ /var/volatile/config | ✔ | ||
| /var/volatile/tmp/db | Database files are stored here if hard disk is not present (or database is forced to store its data into ram disk in /etc/formfactor/machconfig, STORE_DB_ON_RAMDISK setting) or symlink→ /media/hdd/db if hard disk is present | ✔ | ||
| /var/volatile/tmp/db/postgresql | PostgreSQL database files | ✔ | ||
| /var/volatile/tmp/sqlite | symlink→ /tmp/db/sqlite (it is here to keep compatibility within oi1.10. This symlink will not exist in oi1.11/fw2.4) | ✔ | ||
| /var/volatile/tmp/www | Web pages are stored here if there is no non-volatile storage (hard disk or data flash) or symlink→ /media/data/www. Accessible by http://touch_screen_ip | ✔ |