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      1 #
      2 # CDDL HEADER START
      3 #
      4 # The contents of this file are subject to the terms of the
      5 # Common Development and Distribution License (the "License").
      6 # You may not use this file except in compliance with the License.
      7 #
      8 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9 # or http://www.opensolaris.org/os/licensing.
     10 # See the License for the specific language governing permissions
     11 # and limitations under the License.
     12 #
     13 # When distributing Covered Code, include this CDDL HEADER in each
     14 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15 # If applicable, add the following below this CDDL HEADER, with the
     16 # fields enclosed by brackets "[]" replaced with your own identifying
     17 # information: Portions Copyright [yyyy] [name of copyright owner]
     18 #
     19 # CDDL HEADER END
     20 #
     21 # Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     22 # Use is subject to license terms.
     23 #
     24 # ident	"%Z%%M%	%I%	%E% SMI"
     25 #
     26 # Create two files from a list of input strings;
     27 # new_list.c contains an array of characters indexed into by perror and
     28 # strerror;
     29 # errlst.c contains an array of pointers to strings for compatibility
     30 # with existing user programs that reference it directly;
     31 # errlst.c references the strings in new_list.c indirectly using a library
     32 # private symbol, __sys_errs[], in order to get relative relocations.
     33 #
     34 # Since the 64 bit ABI doesn't define the old symbols, the second file
     35 # should be left out 64 bit libraries.
     36 #
     37 # WARNING!
     38 #        Do NOT add entries to this list such that it grows the list
     39 #        beyond the last entry:
     40 #              151     Stale NFS file handle
     41 #        Growing this list may damage programs because this array is
     42 #        copied into a reserved array at runtime.  See bug 4097669.
     43 #
     44 #        If you need to add an entry please use one of the empty
     45 #        slots.
     46 #        The arrays _sys_errs[], accessible via perror(3C) and strerror(3C)
     47 #        interfaces, and sys_errlist[] are created from this list.
     48 #        It is the direct referencing of sys_errlist[] that is the problem.
     49 #        Your code should only use perror() or strerror().
     50 
     51 
     52 BEGIN	{
     53 		FS = "\t"
     54 		hi = 0
     55 
     56 		newfile = "new_list.c"
     57 		oldfile = "errlst.c"
     58 
     59 		print "#pragma ident\t\"%Z%%M%\t%I%\t%E% SMI\"\n" >oldfile
     60 		print "#pragma weak _sys_errlist = sys_errlist\n" >oldfile
     61 		print "#include \"lint.h\"\n" >oldfile
     62 		# We need to include the errors strings proper in the
     63 		# C source for gettext; the macro C allows us to embed
     64 		# them as comment.
     65 		print "#define\tC(x)\n" >oldfile
     66 		print "extern const char __sys_errs[];\n" >oldfile
     67 		print "const char *sys_errlist[] = {" >oldfile
     68 
     69 		print "#pragma ident\t\"%Z%%M%\t%I%\t%E% SMI\"\n" >newfile
     70 		print "#include \"lint.h\"" >newfile
     71 		print "#include <sys/isa_defs.h>\n" >newfile
     72 		print "#pragma weak __sys_errs = _sys_errs\n" >newfile
     73 	}
     74 
     75 /^[0-9]+/ {
     76 		if ($1 > hi)
     77 			hi = $1
     78 		astr[$1] = $2
     79 	}
     80 
     81 END	{
     82 		print "const int _sys_index[] =\n{" >newfile
     83 		k = 0
     84 		mx = 151	# max number of entries for sys_errlist[]
     85 		if (hi > mx)
     86 		{
     87 			printf "awk: ERROR! sys_errlist[] > %d entries\n", mx
     88 			printf "Please read comments in"
     89 			printf " usr/src/lib/libc/port/gen/errlist\n"
     90 			exit 1
     91 		}
     92 		for (j = 0; j <= hi; ++j)
     93 		{
     94 			if (astr[j] == "")
     95 				astr[j] = sprintf("Error %d", j)
     96 			printf "\t%d,\n", k >newfile
     97 			printf "\t&__sys_errs[%d], C(\"%s\")\n", k, astr[j] \
     98 				>oldfile
     99 			k += length(astr[j]) + 1
    100 		}
    101 		print "};\n" >newfile
    102 
    103 		print "/* This is one long string */" >newfile
    104 		printf "const char _sys_errs[%d] =\n", k >newfile
    105 		for (j = 0; j <= hi; ++j)
    106 		{
    107 			printf "\t\"%s\\0\"\n", astr[j] >newfile
    108 		}
    109 		print ";\n" >newfile
    110 		print "};\n" >oldfile
    111 
    112 		print "const int _sys_num_err = " hi + 1 ";\n" >newfile
    113 		print "#undef sys_nerr" >newfile
    114 		print "#ifndef _LP64" >newfile
    115 		print "#pragma weak _sys_nerr = _sys_num_err" >newfile
    116 		print "#pragma weak sys_nerr = _sys_num_err" >newfile
    117 		print "#endif /* _LP64 */" >newfile
    118 	}
    119