plugins-scripts/subst.in

   1 #!/usr/bin/awk
   2
   3 function which(c,path) {
   4         cmd = "test -x " c;
   5
   6         if (system(cmd)==0) {
   7                 return c;
   8         }
   9
  10         sub(/\/.*\//,"",c);
  11   for (dir in path) {
  12                         cmd = "test -x " path[dir] "/" c;
  13                         if (system(cmd)==0) {
  14                                         return path[dir] "/" c;
  15                         }
  16         }
  17
  18
  19         return c;
  20 }
  21
  22 # used to replace "use lib utils.pm" with "use lib @libexecdir"
  23 #
  24 function led() {
  25         led1 = "@libexecdir@";
  26         led2 = "@exec_prefix@";
  27         led3 = "@prefix@";
  28         if ( match(led1, /^\$\{exec_prefix\}/ ) != 0 ) {
  29                 return "\"" led3 "/libexec\" " ;
  30
  31         }
  32         return "\"" led1 "\"" ;
  33 }
  34
  35 BEGIN {
  36         split(ENVIRON["PATH"] ":/sbin:/usr/sbin",path,/:/);
  37
  38 }
  39
  40 # scripting language (first line)
  41
  42 /^#! ?\/.*\/python/ {sub(/^#! ?\/.*\/python/,"#! @PYTHON@");}
  43 /^#! ?\/.*\/perl/ {sub(/^#! ?\/.*\/perl/,"#! @PERL@");}
  44 /^#! ?\/.*\/[a-z]{0,2}awk/ {sub(/^#! ?\/.*\/[a-z]{0,2}awk/,"#! @AWK@");}
  45 /^#! ?\/.*\/sh/ {sub(/^#! ?\/.*\/sh/,"#! @SHELL@");}
  46
  47 # add to libexecdir to INC for perl utils.pm
  48 /^use/ { if (/lib/) { if (/utils.pm|"."/ ) {sub(/utils.pm|"."/,led() )} } }
  49
  50
  51 # Trusted path mechanism (deprecated)
  52
  53 /^[ \t]*\$ENV[ \t]*\{[ \t'"]*PATH[ \t"']*\}[ \t]*=/ {
  54         sub(/\=[ \t]*['"][^"']+["']/,"='@with_trusted_path@' # autoconf-derived");
  55 }
  56
  57 /^[\t ]*(export[\t ]*)?PATH[\t ]*=['"]+.+["']$/ {
  58         sub(/\=.*$/,"='@with_trusted_path@' # autoconf-derived");
  59 }
  60
  61 # If a script contains a reference to a fully qualified command,
  62 # subst will replace the fully qualified command with whatever is
  63 # returned from the which subroutine
  64 #
  65 /^[^#]/ && /(\/.*)?\/(bin|sbin|lib|libexec)\// {
  66         match($0,/(\/.*)?\/(bin|sbin|lib|libexec)\/[-_a-zA-Z0-9]+/);
  67         c=substr($0,RSTART,RLENGTH);
  68         sub(c,which(c,path));
  69 }
  70
  71 {
  72         print;
  73 }
  74