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READING mail from /var/mail/user

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Top Forums Shell Programming and Scripting READING mail from /var/mail/user
# 8  
Old 05-21-2006
Yup..it helps..Smilie...though I'm not sure how it works.
So

headers="(^From )|(^Message-IDSmilie|(^DateSmilie|(^FromSmilie|(^ToSmilie|(^SubjectSmilie"
headers can start with (From,Message-ID,Date...)

/^From/
and then if sentence start with "From" it does the for cyclus

printf("\n\n=== THIS is MAIL MESSAGE #%d ===\n\n", ++msg)
for(i=1; i<=NF; i++) {
if ( $i ~ headers) print $i
}
if the sentence is header then pprint? what does ( ( $i ~ headers)) this mean????

Also I would like to be able to write message text. The best would be if I could choose with Message number as you NAMED with evert message with last code.

THX a lot.
Peto
# 9  
Old 05-21-2006
ok, I've updated the code with comments - should be clearER now. If it's not - do 'man nawk'.
Quote:
Originally Posted by petoSVK
Yup..it helps..Smilie...though I'm not sure how it works.
So

headers="(^From )|(^Message-IDSmilie|(^DateSmilie|(^FromSmilie|(^ToSmilie|(^SubjectSmilie"
headers can start with (From,Message-ID,Date...)

/^From/
and then if sentence start with "From" it does the for cyclus

printf("\n\n=== THIS is MAIL MESSAGE #%d ===\n\n", ++msg)
for(i=1; i<=NF; i++) {
if ( $i ~ headers) print $i
}
if the sentence is header then pprint? what does ( ( $i ~ headers)) this mean????

Also I would like to be able to write message text. The best would be if I could choose with Message number as you NAMED with evert message with last code.
I don't understand what you're asking, but if you understand the code and/or give a sample desired output I believe you can format the output any way you want.

Good luck
# 10  
Old 05-21-2006
I got it, but wasnt sure. Now I understand it thx.

Is it possible to read from STDIN in NAWK? I cannot find it on internet. I would like to write max. 3 Mail Headers and then wait for user to press ENTER and then show next 3 headers and so on.

Well, I'm sorry if I didn't make my question clear. I don't really have any ideas how to write text written by sender in the /var/mail/user. I mean not just Header of the mail, but also mail and omit Msg Info for Server between Header and Message.
# 11  
Old 05-21-2006
Quote:
Originally Posted by petoSVK
I got it, but wasnt sure. Now I understand it thx.

Is it possible to read from STDIN in NAWK? I cannot find it on internet. I would like to write max. 3 Mail Headers and then wait for user to press ENTER and then show next 3 headers and so on.
Code:
BEGIN {
  # make 'records' to be separated by blank/empty lines
  RS=FS=""

  # create a pattern where something starts either one of listed strings
  headers="(^From )|(^Message-ID:)|(^Date:)|(^From:)|(^To:)|(^Subject:)"
}

# If a record starts with 'From ' ...
/^From / {

   if ( !(++msg % 4) ) {
      printf "Please press ENTER: "
      getline myInput < "-"
   }

   # print the record number
   printf("\n\n=== THIS is MAIL MESSAGE #%d ===\n\n", msg)

   # iterate through the fields of a given 'record' - every field is a LINE, 
   # because records are 'blank line' separated sequesnce of lines
   for(i=1; i<=NF; i++) {

     # if a record field (a line) matches a pattern 'headers' - print that field
     if ( $i ~ headers) print $i
   }
}

# print any OTHER 'record' - this is a shorthand for 'print $0'
1

Quote:
Originally Posted by petoSVK
Well, I'm sorry if I didn't make my question clear. I don't really have any ideas how to write text written by sender in the /var/mail/user. I mean not just Header of the mail, but also mail and omit Msg Info for Server between Header and Message.
I don't understand what you're saying.......
Last edited by vgersh99; 05-21-2006 at 07:24 AM..
# 12  
Old 05-21-2006
Ok.I'll try to start expressing myself a bit better Smilie.

Firstly, I considered last character '1' in peto.awk to be a typo so I didn't include it. But now as you've comment it, I see I was wrong. So I was asking exactly what you already did - sorry.

However, I'd like to ask one more question. Now, user can view 4 e-mails at once and then he is asked to press ENTER. However you have to press: CTRL+D and ENTER, ENTER(once more)
so it continues with printing out next mails. Is it possible to avoid this?

You helped me a lot and it's much clearer to me now.

Peto
# 13  
Old 05-21-2006
hmm....... it seems not ALL the awk's support this paradigm - Solaris's 'nawk' seems to be one of them.

Try this:
Code:
BEGIN {
  # make 'records' to be separated by blank/empty lines
  RS=FS=""

  # create a pattern where something starts either one of listed strings
  headers="(^From )|(^Message-ID:)|(^Date:)|(^From:)|(^To:)|(^Subject:)"
}

# If a record starts with 'From ' ...
/^From / {

   if ( !(++msg % 4) ) {
      printf "Please press ENTER: "
      cmd="read a"; cmd | getline foo
      close(cmd)
   }

   # print the record number
   printf("\n\n=== THIS is MAIL MESSAGE #%d ===\n\n", msg)

   # iterate through the fields of a given 'record' - every field is a LINE, 
   # because records are 'blank line' separated sequesnce of lines
   for(i=1; i<=NF; i++) {

     # if a record field (a line) matches a pattern 'headers' - print that field
     if ( $i ~ headers) print $i
   }
}

# print any OTHER 'record' - this is a shorthand for 'print $0'
1

# 14  
Old 05-21-2006
Works flawlessly now Smilie)).

Its nice to have such a good forum Smilie.
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