root-tools/sendmail.cron

   1 #!/bin/bash
   2
   3 set -e
   4 set -o pipefail
   5 set -u
   6
   7 . /usr/lib/tool/bash-utils
   8
   9 basedir=/var/log/cron/user
  10 timestamp=`date "+%F %T %z"`
  11
  12 cron_user=''
  13 cron_job_cmd=''
  14 cron_job_id=''
  15 partial_cron_message=''
  16
  17 while read -r line
  18 do
  19         if [ "$line" = '' -o "$line" = $'\r' ]
  20         then
  21                 # we are at the end of headers
  22
  23                 if [ -z "$cron_user" -o -z "$cron_job_cmd" ]
  24                 then
  25                         errx -2 "Missing either 'To' or 'Subject' header."
  26                 fi
  27
  28                 message_body=`cat`
  29                 if [ "$message_body" = "" -o "$message_body" = $'\n' ]
  30                 then
  31                         continue
  32                 fi
  33                 full_cron_message=$partial_cron_message$line$'\n'$message_body
  34                 unset message_body
  35
  36                 cron_job=$cron_job_cmd
  37                 if [ -n "$cron_job_id" ]; then cron_job=$cron_job_id; fi
  38
  39                 command_name_noslash=`echo "$cron_job" | sed -e 's@/@⁄@g'`
  40                 command_name_noslash=${command_name_noslash:0:255}
  41                 user_name_noslash=`echo "$cron_user" | sed -e 's@/@⁄@g'`
  42
  43                 set +e
  44                 # let's see if the user can create her own directory
  45                 if [ ! -d "$basedir/$user_name_noslash" ]
  46                 then
  47                         install -o "$cron_user" -m 0750 -d "$basedir/$user_name_noslash"
  48                 fi
  49                 # if it's still is not there, let's try this custom sudo rule
  50                 if [ ! -d "$basedir/$user_name_noslash" ]
  51                 then
  52                         sudo subst_sudo_user /usr/bin/install -o '$SUDO_USER' -m 0750 -d /var/log/cron/user/'$SUDO_USER'
  53                 fi
  54                 set -e
  55                 # if we failed to create the directory,
  56                 # let's fail when we try to write to a file under it.
  57
  58                 logfile=$basedir/$user_name_noslash/$command_name_noslash
  59                 echo "$full_cron_message" | sed -e 's!^!'"$timestamp\t"'!' >> "$logfile"
  60         else
  61                 # we are reading the email headers
  62
  63                 partial_cron_message=$partial_cron_message$line$'\n'
  64                 if [ "${line:0:3}" = To: ]
  65                 then
  66                         # assuming a single space before username, ie. "To: USERNAME"
  67                         cron_user=${line:4}
  68                 elif [ "${line:0:8}" = Subject: ]
  69                 then
  70                         # assuming the header like "Subject: Cron <user@host> command..."
  71                         cron_job_cmd=`echo "$line" | cut -d' ' -f4-`
  72                         # trim leading spaces and tabs
  73                         cron_job_cmd=${cron_job_cmd/#+( |$'\t')}
  74                 elif [[ $line =~ X-Cron-Env:\ \<CRONJOBID=(.+?)\> ]]
  75                 then
  76                         # record CRONJOBID if the user did set it
  77                         cron_job_id=${BASH_REMATCH[1]}
  78                 fi
  79         fi
  80 done