4.2 supports.txt

CLIENT (see Client) backup the support’s status into the ~mdtx/git/mdtx/supports.txt file. Support’s checksum is compute using md5sum for internal identification like for all MEDIATEX archives, but is also using sha1… who know.

Relational schema:

• Proper entities
  • The SUPPORT entity list all the local supports.

  There is 2 kind of records

  • external support: support's name
    PUBLISHER (see Who) provides theses supports manually only when they are requiered by CLIENT (see Client). Else the supports are not accessed by MEDIATEX. External supports are devices (CDROM, USB key …), or files PUBLISHER know how to access from the local host (backups, S3, …).
  • external file: absolute path
    Theses supports are files supposed to be permantly available on the local host. CLIENT access diretely to them without asking PUBLISHER to provide them.
• Linked entities
  • The COLLECTION entity, from /etc/mediatex/mdtx.conf (see mdtx.conf), lists all the collections the server share.
• Relations
  • The COLLECTIONS relationship list all the collection a specific support is shared with. This relation is not recorded into this file but into /etc/mediatex/mdtx.conf.

Example: (line is cut to display it here)

#         firstSeen           lastCheck            lastSeen…
2010-01-01,01:00:00 2010-01-01,01:00:00 2010-01-01,01:00:00…

…                     quickMd5sum                       fullMd5sum…
…de5008799752552b7963a2670dc5eb18 de5008799752552b7963a2670dc5eb18…

…                             quickShasum…
…6ed0e67ccd882f6e94f931a07834bc6bc6394583…

…                              fullShasum…
…6ed0e67ccd882f6e94f931a07834bc6bc6394583…

…size       status name
…391168         ok ex-cd1

Grammar:

file: lines
    | //empty file
    
lines: lines line
     | line

line: date date date md5 md5 sha sha [[:digit:]]+ status name

date:   {year}-{month}-{day},{hour}:{min}:{sec}

year:   [[:digit:]]{4}
month:  [[:digit:]]{2}
day:    [[:digit:]]{2}
hour:   [[:digit:]]{2}
min:    [[:digit:]]{2}
sec:    [[:digit:]]{2}

md5:    [[:xdigit:]]{32}      
sha:    [[:xdigit:]]{40}      
status: [^[:blank:]\r\n]{1,10} 
name:   [^[:blank:]\r\n]{1,64} 

Code:

src/memory/supportTree.h

src/memory/supportTree.c

src/parser/supportFile.l

src/parser/supportFile.y

This function is used to differenciate external supports from external supports’s files:

int  isSupportFile(Support* self)
{
  int rc = FALSE;

  checkSupport(self);
  rc = (*self->name == '/');
  
 error:
  return rc;
}