grub-rebootin.awk

   1 #!/bin/awk -f
   2
   3 BEGIN {
   4         menu = "/boot/grub/menu.lst"
   5         once = "/boot/grub/menu.once"
   6
   7         if ((getline < menu) > 0)
   8                 close(menu)
   9         else {
  10                 print "grub is not installed (" menu " is missing)"
  11                 exit 1
  12         }
  13         nrentries = 0
  14         altconfig = 0
  15         while (getline < menu) {
  16                 if ( /^title[ \t]+/ ) {
  17                         gsub(/^title[ \t]+/,"")
  18                         entries[nrentries] = $0
  19                         nrentries++
  20                 }
  21                 if ( /^altconfigfile[ \t]+.*grub\/menu\.once/ )
  22                         altconfig = 1
  23         }
  24         if ( !altconfig ) {
  25                 print "rebootin is of no use without altconfigfile"
  26                 exit 2
  27         }
  28         if ( !nrentries ) {
  29                 print "bad menu.lst (no entry found)"
  30                 exit 3
  31         }
  32         if ( ARGC != 2 ) {
  33                 print "usage: rebootin <label>\n  where <label> is one of "
  34                 for (n = 0 ; n < nrentries ; n++)
  35                         print " " entries[n]
  36                 exit 4
  37         }
  38
  39         for (n = 0 ; n < nrentries ; n++)
  40                 if ( ARGV[1] == entries[n] ) {
  41                         dflt = "default " n
  42                         print dflt "\ntimeout 0\n" > once
  43                         close(once)
  44                         getline be_safe < once
  45                         if ( be_safe != dflt ) {
  46                                 print "can't write rebootin file (" once "), verify the rights"
  47                                 exit 666
  48                         }
  49                         system("/sbin/shutdown -r now")
  50                         print "dupa"
  51                 }
  52
  53         print "\"" ARGV[1] "\" not found"
  54 }