?RCS: $Id: Findhdr.U 1 2006-08-24 12:32:52Z rmanfredi $ ?RCS: ?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi ?RCS: ?RCS: You may redistribute only under the terms of the Artistic Licence, ?RCS: as specified in the README file that comes with the distribution. ?RCS: You may reuse parts of this distribution only within the terms of ?RCS: that same Artistic Licence; a copy of which may be found at the root ?RCS: of the source tree for dist 4.0. ?RCS: ?RCS: Original Author: Thomas Neumann ?RCS: ?RCS: $Log: Findhdr.U,v $ ?RCS: Revision 3.0.1.2 1994/10/29 15:53:08 ram ?RCS: patch36: added ?F: line for metalint file checking ?RCS: ?RCS: Revision 3.0.1.1 1994/05/06 14:03:56 ram ?RCS: patch23: cppminus must be after other cppflags, not before ?RCS: ?RCS: Revision 3.0 1993/08/18 12:04:54 ram ?RCS: Baseline for dist 3.0 netwide release. ?RCS: ?X: ?X: This unit produces a findhdr script which is used to locate the header ?X: files in $usrinc or other stranger places using cpp capabilities. The ?X: script is given an include file base name, like 'stdio.h' or 'sys/file.h' ?X: and it returns the full path of the include file and a zero status or an ?X: empty string with an error status if the file could not be located. ?X: ?MAKE:Findhdr: grep test tr rm +usrinc awk cat startsh \ cppstdin cppminus +cppflags eunicefix osname ?MAKE: -pick add $@ %< ?LINT:define fieldn ?S:fieldn: ?S: This variable is used internally by Configure. It contains the position ?S: of the included file name in cpp output. That is to say, when cpp ?S: pre-processes a #include line, it replaces it by a # line which ?S: contains the original position in the input file and the full name of ?S: included file, between "quotes". ?S:. ?V:fieldn ?F:./findhdr !fieldn ?T:cline pos wanted name awkprg cppfilter testaccess status usrincdir : determine filename position in cpp output echo " " echo "Computing filename position in cpp output for #include directives..." >&4 echo '#include ' > foo.c case "$osname" in vos) testaccess=-e ?X: VOS: path component separator is > cppfilter="tr '\\\\>' '/' |" ;; *) testaccess=-r cppfilter='' ;; esac $cat >fieldn </dev/null | \ $grep '^[ ]*#.*stdio\.h' | \ while read cline; do pos=1 set \$cline while $test \$# -gt 0; do if $test $testaccess \`echo \$1 | $tr -d '"'\`; then echo "\$pos" exit 0 fi shift pos=\`expr \$pos + 1\` done done EOF chmod +x fieldn fieldn=`./fieldn` $rm -f foo.c fieldn case $fieldn in '') pos='???';; 1) pos=first;; 2) pos=second;; 3) pos=third;; *) pos="${fieldn}th";; esac echo "Your cpp writes the filename in the $pos field of the line." ?X: To locate a header file, we cannot simply check for $usrinc/file.h, since ?X: some machine have the headers in weird places and our only hope is that ?X: the C pre-processor will know how to find those headers. Thank you NexT! : locate header file $cat >findhdr <" > foo\$\$.c $cppstdin $cppminus $cppflags < foo\$\$.c 2>/dev/null | \ $cppfilter $grep "^[ ]*#.*\$wanted" | \ while read cline; do name=\`echo \$cline | $awk "\$awkprg" | $tr -d '"'\` case "\$name" in *[/\\\\]\$wanted) echo "\$name"; exit 1;; *[\\\\/]\$wanted) echo "\$name"; exit 1;; *) exit 2;; esac done ?X: status = 0: grep returned 0 lines, case statement not executed ?X: status = 1: headerfile found ?X: status = 2: while loop executed, no headerfile found status=\$? $rm -f foo\$\$.c if test \$status -eq 1; then exit 0 fi exit 1 EOF chmod +x findhdr $eunicefix findhdr