The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/makesyscalls.sh

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    1 #! /bin/sh -
    2 #       @(#)makesyscalls.sh     8.1 (Berkeley) 6/10/93
    3 # $FreeBSD$
    4 
    5 set -e
    6 
    7 # name of compat options:
    8 compat=COMPAT_43
    9 compat4=COMPAT_FREEBSD4
   10 compat6=COMPAT_FREEBSD6
   11 
   12 # output files:
   13 sysnames="syscalls.c"
   14 sysproto="../sys/sysproto.h"
   15 sysproto_h=_SYS_SYSPROTO_H_
   16 syshdr="../sys/syscall.h"
   17 sysmk="../sys/syscall.mk"
   18 syssw="init_sysent.c"
   19 syscallprefix="SYS_"
   20 switchname="sysent"
   21 namesname="syscallnames"
   22 systrace="systrace_args.c"
   23 
   24 # tmp files:
   25 sysaue="sysent.aue.$$"
   26 sysdcl="sysent.dcl.$$"
   27 syscompat="sysent.compat.$$"
   28 syscompatdcl="sysent.compatdcl.$$"
   29 syscompat4="sysent.compat4.$$"
   30 syscompat4dcl="sysent.compat4dcl.$$"
   31 syscompat6="sysent.compat6.$$"
   32 syscompat6dcl="sysent.compat6dcl.$$"
   33 sysent="sysent.switch.$$"
   34 sysinc="sysinc.switch.$$"
   35 sysarg="sysarg.switch.$$"
   36 sysprotoend="sysprotoend.$$"
   37 
   38 trap "rm $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $sysent $sysinc $sysarg $sysprotoend" 0
   39 
   40 touch $sysaue $sysdcl $syscompat $syscompatdcl $syscompat4 $syscompat4dcl $syscompat6 $syscompat6dcl $sysent $sysinc $sysarg $sysprotoend
   41 
   42 case $# in
   43     0)  echo "usage: $0 input-file <config-file>" 1>&2
   44         exit 1
   45         ;;
   46 esac
   47 
   48 if [ -n "$2" -a -f "$2" ]; then
   49         . $2
   50 fi
   51 
   52 sed -e '
   53 s/\$//g
   54 :join
   55         /\\$/{a\
   56 
   57         N
   58         s/\\\n//
   59         b join
   60         }
   61 2,${
   62         /^#/!s/\([{}()*,]\)/ \1 /g
   63 }
   64 ' < $1 | awk "
   65         BEGIN {
   66                 sysaue = \"$sysaue\"
   67                 sysdcl = \"$sysdcl\"
   68                 sysproto = \"$sysproto\"
   69                 sysprotoend = \"$sysprotoend\"
   70                 sysproto_h = \"$sysproto_h\"
   71                 syscompat = \"$syscompat\"
   72                 syscompatdcl = \"$syscompatdcl\"
   73                 syscompat4 = \"$syscompat4\"
   74                 syscompat4dcl = \"$syscompat4dcl\"
   75                 syscompat6 = \"$syscompat6\"
   76                 syscompat6dcl = \"$syscompat6dcl\"
   77                 sysent = \"$sysent\"
   78                 syssw = \"$syssw\"
   79                 sysinc = \"$sysinc\"
   80                 sysarg = \"$sysarg\"
   81                 sysnames = \"$sysnames\"
   82                 syshdr = \"$syshdr\"
   83                 sysmk = \"$sysmk\"
   84                 systrace = \"$systrace\"
   85                 compat = \"$compat\"
   86                 compat4 = \"$compat4\"
   87                 compat6 = \"$compat6\"
   88                 syscallprefix = \"$syscallprefix\"
   89                 switchname = \"$switchname\"
   90                 namesname = \"$namesname\"
   91                 infile = \"$1\"
   92                 "'
   93 
   94                 printf "/*\n * System call switch table.\n *\n" > syssw
   95                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > syssw
   96                 printf " * $%s$\n", "FreeBSD" > syssw
   97 
   98                 printf "/*\n * System call prototypes.\n *\n" > sysarg
   99                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysarg
  100                 printf " * $%s$\n", "FreeBSD" > sysarg
  101 
  102                 printf "\n#ifdef %s\n\n", compat > syscompat
  103                 printf "\n#ifdef %s\n\n", compat4 > syscompat4
  104                 printf "\n#ifdef %s\n\n", compat6 > syscompat6
  105 
  106                 printf "/*\n * System call names.\n *\n" > sysnames
  107                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > sysnames
  108                 printf " * $%s$\n", "FreeBSD" > sysnames
  109 
  110                 printf "/*\n * System call numbers.\n *\n" > syshdr
  111                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > syshdr
  112                 printf " * $%s$\n", "FreeBSD" > syshdr
  113                 printf "# FreeBSD system call names.\n" > sysmk
  114                 printf "# DO NOT EDIT-- this file is automatically generated.\n" > sysmk
  115                 printf "# $%s$\n", "FreeBSD" > sysmk
  116 
  117                 printf "/*\n * System call argument to DTrace register array converstion.\n *\n" > systrace
  118                 printf " * DO NOT EDIT-- this file is automatically generated.\n" > systrace
  119                 printf " * $%s$\n", "FreeBSD" > systrace
  120         }
  121         NR == 1 {
  122                 gsub("[$]FreeBSD: ", "", $0)
  123                 gsub(" [$]", "", $0)
  124 
  125                 printf " * created from%s\n */\n\n", $0 > syssw
  126 
  127                 printf "\n/* The casts are bogus but will do for now. */\n" > sysent
  128                 printf "struct sysent %s[] = {\n",switchname > sysent
  129 
  130                 printf " * created from%s\n */\n\n", $0 > sysarg
  131                 printf "#ifndef %s\n", sysproto_h > sysarg
  132                 printf "#define\t%s\n\n", sysproto_h > sysarg
  133                 printf "#include <sys/signal.h>\n" > sysarg
  134                 printf "#include <sys/acl.h>\n" > sysarg
  135                 printf "#include <sys/_semaphore.h>\n" > sysarg
  136                 printf "#include <sys/ucontext.h>\n\n" > sysarg
  137                 printf "#include <bsm/audit_kevents.h>\n\n" > sysarg
  138                 printf "struct proc;\n\n" > sysarg
  139                 printf "struct thread;\n\n" > sysarg
  140                 printf "#define\tPAD_(t)\t(sizeof(register_t) <= sizeof(t) ? \\\n" > sysarg
  141                 printf "\t\t0 : sizeof(register_t) - sizeof(t))\n\n" > sysarg
  142                 printf "#if BYTE_ORDER == LITTLE_ENDIAN\n"> sysarg
  143                 printf "#define\tPADL_(t)\t0\n" > sysarg
  144                 printf "#define\tPADR_(t)\tPAD_(t)\n" > sysarg
  145                 printf "#else\n" > sysarg
  146                 printf "#define\tPADL_(t)\tPAD_(t)\n" > sysarg
  147                 printf "#define\tPADR_(t)\t0\n" > sysarg
  148                 printf "#endif\n\n" > sysarg
  149 
  150                 printf " * created from%s\n */\n\n", $0 > sysnames
  151                 printf "const char *%s[] = {\n", namesname > sysnames
  152 
  153                 printf " * created from%s\n */\n\n", $0 > syshdr
  154 
  155                 printf "# created from%s\nMIASM = ", $0 > sysmk
  156 
  157                 printf " * This file is part of the DTrace syscall provider.\n */\n\n" > systrace
  158                 printf "static void\nsystrace_args(int sysnum, void *params, u_int64_t *uarg, int *n_args)\n{\n" > systrace
  159                 printf "\tint64_t *iarg  = (int64_t *) uarg;\n" > systrace
  160                 printf "\tswitch (sysnum) {\n" > systrace
  161 
  162                 next
  163         }
  164         NF == 0 || $1 ~ /^;/ {
  165                 next
  166         }
  167         $1 ~ /^#[       ]*include/ {
  168                 print > sysinc
  169                 next
  170         }
  171         $1 ~ /^#[       ]*if/ {
  172                 print > sysent
  173                 print > sysdcl
  174                 print > sysarg
  175                 print > syscompat
  176                 print > syscompat4
  177                 print > syscompat6
  178                 print > sysnames
  179                 savesyscall = syscall
  180                 next
  181         }
  182         $1 ~ /^#[       ]*else/ {
  183                 print > sysent
  184                 print > sysdcl
  185                 print > sysarg
  186                 print > syscompat
  187                 print > syscompat4
  188                 print > syscompat6
  189                 print > sysnames
  190                 syscall = savesyscall
  191                 next
  192         }
  193         $1 ~ /^#/ {
  194                 print > sysent
  195                 print > sysdcl
  196                 print > sysarg
  197                 print > syscompat
  198                 print > syscompat4
  199                 print > syscompat6
  200                 print > sysnames
  201                 next
  202         }
  203         syscall != $1 {
  204                 printf "%s: line %d: syscall number out of sync at %d\n",
  205                     infile, NR, syscall
  206                 printf "line is:\n"
  207                 print
  208                 exit 1
  209         }
  210         function align_sysent_comment(column) {
  211                 printf("\t") > sysent
  212                 column = column + 8 - column % 8
  213                 while (column < 56) {
  214                         printf("\t") > sysent
  215                         column = column + 8
  216                 }
  217         }
  218         function parserr(was, wanted) {
  219                 printf "%s: line %d: unexpected %s (expected %s)\n",
  220                     infile, NR, was, wanted
  221                 exit 1
  222         }
  223         function parseline() {
  224                 f=4                     # toss number, type, audit event
  225                 argc= 0;
  226                 argssize = "0"
  227                 if ($NF != "}") {
  228                         funcalias=$(NF-2)
  229                         argalias=$(NF-1)
  230                         rettype=$NF
  231                         end=NF-3
  232                 } else {
  233                         funcalias=""
  234                         argalias=""
  235                         rettype="int"
  236                         end=NF
  237                 }
  238                 if ($3 == "NODEF") {
  239                         auditev="AUE_NULL"
  240                         funcname=$4
  241                         argssize = "AS(" $6 ")"
  242                         return
  243                 }
  244                 if ($f != "{")
  245                         parserr($f, "{")
  246                 f++
  247                 if ($end != "}")
  248                         parserr($end, "}")
  249                 end--
  250                 if ($end != ";")
  251                         parserr($end, ";")
  252                 end--
  253                 if ($end != ")")
  254                         parserr($end, ")")
  255                 end--
  256 
  257                 f++     #function return type
  258 
  259                 funcname=$f
  260                 if (funcalias == "")
  261                         funcalias = funcname
  262                 if (argalias == "") {
  263                         argalias = funcname "_args"
  264                         if ($3 == "COMPAT")
  265                                 argalias = "o" argalias
  266                         if ($3 == "COMPAT4")
  267                                 argalias = "freebsd4_" argalias
  268                         if ($3 == "COMPAT6")
  269                                 argalias = "freebsd6_" argalias
  270                 }
  271                 f++
  272 
  273                 if ($f != "(")
  274                         parserr($f, ")")
  275                 f++
  276 
  277                 if (f == end) {
  278                         if ($f != "void")
  279                                 parserr($f, "argument definition")
  280                         return
  281                 }
  282 
  283                 while (f <= end) {
  284                         argc++
  285                         argtype[argc]=""
  286                         oldf=""
  287                         while (f < end && $(f+1) != ",") {
  288                                 if (argtype[argc] != "" && oldf != "*")
  289                                         argtype[argc] = argtype[argc]" ";
  290                                 argtype[argc] = argtype[argc]$f;
  291                                 oldf = $f;
  292                                 f++
  293                         }
  294                         if (argtype[argc] == "")
  295                                 parserr($f, "argument definition")
  296                         argname[argc]=$f;
  297                         f += 2;                 # skip name, and any comma
  298                 }
  299                 if (argc != 0)
  300                         argssize = "AS(" argalias ")"
  301         }
  302         {       comment = $4
  303                 if (NF < 7)
  304                         for (i = 5; i <= NF; i++)
  305                                 comment = comment " " $i
  306         }
  307 
  308         #
  309         # The AUE_ audit event identifier.
  310         #
  311         {
  312                 auditev = $2;
  313         }
  314 
  315         $3 == "STD" || $3 == "NODEF" || $3 == "NOARGS"  || $3 == "NOPROTO" \
  316             || $3 == "NOIMPL" || $3 == "NOSTD" {
  317                 parseline()
  318                 printf("\t/* %s */\n\tcase %d: {\n", funcname, syscall) > systrace
  319                 if (argc > 0) {
  320                         printf("\t\tstruct %s *p = params;\n", argalias) > systrace
  321                         for (i = 1; i <= argc; i++) {
  322                                 if (index(argtype[i], "*") > 0 || argtype[i] == "caddr_t")
  323                                         printf("\t\tuarg[%d] = (intptr_t) p->%s; /* %s */\n", \
  324                                              i - 1, \
  325                                              argname[i], argtype[i]) > systrace
  326                                 else if (substr(argtype[i], 1, 1) == "u" || argtype[i] == "size_t")
  327                                         printf("\t\tuarg[%d] = p->%s; /* %s */\n", \
  328                                              i - 1, \
  329                                              argname[i], argtype[i]) > systrace
  330                                 else
  331                                         printf("\t\tiarg[%d] = p->%s; /* %s */\n", \
  332                                              i - 1, \
  333                                              argname[i], argtype[i]) > systrace
  334                         }
  335                 }
  336                 printf("\t\t*n_args = %d;\n\t\tbreak;\n\t}\n", argc) > systrace
  337                 if ((!nosys || funcname != "nosys") && \
  338                     (funcname != "lkmnosys") && (funcname != "lkmressys")) {
  339                         if (argc != 0 && $3 != "NOARGS" && $3 != "NOPROTO") {
  340                                 printf("struct %s {\n", argalias) > sysarg
  341                                 for (i = 1; i <= argc; i++)
  342                                         printf("\tchar %s_l_[PADL_(%s)]; " \
  343                                             "%s %s; char %s_r_[PADR_(%s)];\n",
  344                                             argname[i], argtype[i],
  345                                             argtype[i], argname[i],
  346                                             argname[i], argtype[i]) > sysarg
  347                                 printf("};\n") > sysarg
  348                         }
  349                         else if ($3 != "NOARGS" && $3 != "NOPROTO" && \
  350                             $3 != "NODEF")
  351                                 printf("struct %s {\n\tregister_t dummy;\n};\n",
  352                                     argalias) > sysarg
  353                 }
  354                 if (($3 != "NOPROTO" && $3 != "NODEF" && \
  355                     (funcname != "nosys" || !nosys)) || \
  356                     (funcname == "lkmnosys" && !lkmnosys) || \
  357                     funcname == "lkmressys") {
  358                         printf("%s\t%s(struct thread *, struct %s *)",
  359                             rettype, funcname, argalias) > sysdcl
  360                         printf(";\n") > sysdcl
  361                         printf("#define\t%sAUE_%s\t%s\n", syscallprefix,
  362                             funcalias, auditev) > sysaue
  363                 }
  364                 if (funcname == "nosys")
  365                         nosys = 1
  366                 if (funcname == "lkmnosys")
  367                         lkmnosys = 1
  368                 printf("\t{ %s, (sy_call_t *)", argssize) > sysent
  369                 column = 8 + 2 + length(argssize) + 15
  370                 if ($3 == "NOIMPL") {
  371                         printf("%s },", "nosys, AUE_NULL, NULL, 0, 0") > sysent
  372                         column = column + length("nosys") + 3
  373                 } else if ($3 == "NOSTD") {
  374                         printf("%s },", "lkmressys, AUE_NULL, NULL, 0, 0") > sysent
  375                         column = column + length("lkmressys") + 3
  376                 } else {
  377                         printf("%s, %s, NULL, 0, 0 },", funcname, auditev) > sysent
  378                         column = column + length(funcname) + length(auditev) + 3
  379                 } 
  380                 align_sysent_comment(column)
  381                 printf("/* %d = %s */\n", syscall, funcalias) > sysent
  382                 printf("\t\"%s\",\t\t\t/* %d = %s */\n",
  383                     funcalias, syscall, funcalias) > sysnames
  384                 if ($3 != "NODEF") {
  385                         printf("#define\t%s%s\t%d\n", syscallprefix,
  386                             funcalias, syscall) > syshdr
  387                         printf(" \\\n\t%s.o", funcalias) > sysmk
  388                 }
  389                 syscall++
  390                 next
  391         }
  392         $3 == "COMPAT" || $3 == "COMPAT4" || $3 == "COMPAT6" || $3 == "CPT_NOA" {
  393                 if ($3 == "COMPAT" || $3 == "CPT_NOA") {
  394                         ncompat++
  395                         out = syscompat
  396                         outdcl = syscompatdcl
  397                         wrap = "compat"
  398                         prefix = "o"
  399                 } else if ($3 == "COMPAT4") {
  400                         ncompat4++
  401                         out = syscompat4
  402                         outdcl = syscompat4dcl
  403                         wrap = "compat4"
  404                         prefix = "freebsd4_"
  405                 } else if ($3 == "COMPAT6") {
  406                         ncompat6++
  407                         out = syscompat6
  408                         outdcl = syscompat6dcl
  409                         wrap = "compat6"
  410                         prefix = "freebsd6_"
  411                 }
  412                 parseline()
  413                 if (argc != 0 && $3 != "CPT_NOA") {
  414                         printf("struct %s {\n", argalias) > out
  415                         for (i = 1; i <= argc; i++)
  416                                 printf("\tchar %s_l_[PADL_(%s)]; %s %s; " \
  417                                     "char %s_r_[PADR_(%s)];\n",
  418                                     argname[i], argtype[i],
  419                                     argtype[i], argname[i],
  420                                     argname[i], argtype[i]) > out
  421                         printf("};\n") > out
  422                 }
  423                 else if($3 != "CPT_NOA")
  424                         printf("struct %s {\n\tregister_t dummy;\n};\n",
  425                             argalias) > sysarg
  426                 printf("%s\t%s%s(struct thread *, struct %s *);\n",
  427                     rettype, prefix, funcname, argalias) > outdcl
  428                 printf("\t{ %s(%s,%s), %s, NULL, 0, 0 },",
  429                     wrap, argssize, funcname, auditev) > sysent
  430                 align_sysent_comment(8 + 9 + \
  431                     length(argssize) + 1 + length(funcname) + length(auditev) + 4)
  432                 printf("/* %d = old %s */\n", syscall, funcalias) > sysent
  433                 printf("\t\"%s.%s\",\t\t/* %d = old %s */\n",
  434                     wrap, funcalias, syscall, funcalias) > sysnames
  435                 if ($3 == "COMPAT" || $3 == "CPT_NOA") {
  436                         printf("\t\t\t\t/* %d is old %s */\n",
  437                             syscall, funcalias) > syshdr
  438                 } else {
  439                         printf("#define\t%s%s%s\t%d\n", syscallprefix,
  440                             prefix, funcalias, syscall) > syshdr
  441                         printf(" \\\n\t%s%s.o", prefix, funcalias) > sysmk
  442                 }
  443                 syscall++
  444                 next
  445         }
  446         $3 == "LIBCOMPAT" {
  447                 ncompat++
  448                 parseline()
  449                 printf("%s\to%s();\n", rettype, funcname) > syscompatdcl
  450                 printf("\t{ compat(%s,%s), %s, NULL, 0, 0 },",
  451                     argssize, funcname, auditev) > sysent
  452                 align_sysent_comment(8 + 9 + \
  453                     length(argssize) + 1 + length(funcname) + length(auditev) + 4)
  454                 printf("/* %d = old %s */\n", syscall, funcalias) > sysent
  455                 printf("\t\"old.%s\",\t\t/* %d = old %s */\n",
  456                     funcalias, syscall, funcalias) > sysnames
  457                 printf("#define\t%s%s\t%d\t/* compatibility; still used by libc */\n",
  458                     syscallprefix, funcalias, syscall) > syshdr
  459                 printf(" \\\n\t%s.o", funcalias) > sysmk
  460                 syscall++
  461                 next
  462         }
  463         $3 == "OBSOL" {
  464                 printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0 },") > sysent
  465                 align_sysent_comment(34)
  466                 printf("/* %d = obsolete %s */\n", syscall, comment) > sysent
  467                 printf("\t\"obs_%s\",\t\t\t/* %d = obsolete %s */\n",
  468                     $4, syscall, comment) > sysnames
  469                 printf("\t\t\t\t/* %d is obsolete %s */\n",
  470                     syscall, comment) > syshdr
  471                 syscall++
  472                 next
  473         }
  474         $3 == "UNIMPL" {
  475                 printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0 },\t\t\t/* %d = %s */\n",
  476                     syscall, comment) > sysent
  477                 printf("\t\"#%d\",\t\t\t/* %d = %s */\n",
  478                     syscall, syscall, comment) > sysnames
  479                 syscall++
  480                 next
  481         }
  482         {
  483                 printf "%s: line %d: unrecognized keyword %s\n", infile, NR, $3
  484                 exit 1
  485         }
  486         END {
  487                 printf "\n#define AS(name) (sizeof(struct name) / sizeof(register_t))\n" > sysinc
  488 
  489                 if (ncompat != 0 || ncompat4 != 0 || ncompat6 != 0)
  490                         printf "#include \"opt_compat.h\"\n\n" > syssw
  491                 printf "#include \<bsm/audit_kevents.h\>\n" > syssw
  492 
  493                 if (ncompat != 0) {
  494                         printf "\n#ifdef %s\n", compat > sysinc
  495                         printf "#define compat(n, name) n, (sy_call_t *)__CONCAT(o,name)\n" > sysinc
  496                         printf "#else\n" > sysinc
  497                         printf "#define compat(n, name) 0, (sy_call_t *)nosys\n" > sysinc
  498                         printf "#endif\n" > sysinc
  499                 }
  500 
  501                 if (ncompat4 != 0) {
  502                         printf "\n#ifdef %s\n", compat4 > sysinc
  503                         printf "#define compat4(n, name) n, (sy_call_t *)__CONCAT(freebsd4_,name)\n" > sysinc
  504                         printf "#else\n" > sysinc
  505                         printf "#define compat4(n, name) 0, (sy_call_t *)nosys\n" > sysinc
  506                         printf "#endif\n" > sysinc
  507                 }
  508 
  509                 if (ncompat6 != 0) {
  510                         printf "\n#ifdef %s\n", compat6 > sysinc
  511                         printf "#define compat6(n, name) n, (sy_call_t *)__CONCAT(freebsd6_,name)\n" > sysinc
  512                         printf "#else\n" > sysinc
  513                         printf "#define compat6(n, name) 0, (sy_call_t *)nosys\n" > sysinc
  514                         printf "#endif\n" > sysinc
  515                 }
  516 
  517                 printf("\n#endif /* %s */\n\n", compat) > syscompatdcl
  518                 printf("\n#endif /* %s */\n\n", compat4) > syscompat4dcl
  519                 printf("\n#endif /* %s */\n\n", compat6) > syscompat6dcl
  520 
  521                 printf("\n#undef PAD_\n") > sysprotoend
  522                 printf("#undef PADL_\n") > sysprotoend
  523                 printf("#undef PADR_\n") > sysprotoend
  524                 printf("\n#endif /* !%s */\n", sysproto_h) > sysprotoend
  525 
  526                 printf("\n") > sysmk
  527                 printf("};\n") > sysent
  528                 printf("};\n") > sysnames
  529                 printf("#define\t%sMAXSYSCALL\t%d\n", syscallprefix, syscall) \
  530                     > syshdr
  531                 printf "\tdefault:\n\t\t*n_args = 0;\n\t\tbreak;\n\t};\n}\n" > systrace
  532         } '
  533 
  534 cat $sysinc $sysent >> $syssw
  535 cat $sysarg $sysdcl \
  536         $syscompat $syscompatdcl \
  537         $syscompat4 $syscompat4dcl \
  538         $syscompat6 $syscompat6dcl \
  539         $sysaue $sysprotoend > $sysproto
  540 

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