/* RCS $Id: stat.c,v 1.2 2007-01-18 09:32:36 vg Exp $ -- -- SYNOPSIS -- Bind a target name to a file. -- -- DESCRIPTION -- This file contains the code to go and stat a target. The stat rules -- follow a predefined order defined in the comment for Stat_target. -- -- AUTHOR -- Dennis Vadura, dvadura@dmake.wticorp.com -- -- WWW -- http://dmake.wticorp.com/ -- -- COPYRIGHT -- Copyright (c) 1996,1997 by WTI Corp. All rights reserved. -- -- This program is NOT free software; you can redistribute it and/or -- modify it under the terms of the Software License Agreement Provided -- in the file /readme/license.txt. -- -- LOG -- Use cvs log to obtain detailed change logs. */ #include "extern.h" static int _check_dir_list ANSI((CELLPTR, CELLPTR, int, int)); #ifdef DBUG /* Just a little ditty for debugging this thing */ static time_t _do_stat( name, lib, sym, force ) char *name; char *lib; char **sym; int force; { time_t res; DB_ENTER( "_do_stat" ); res = Do_stat(name, lib, sym, force); DB_PRINT( "stat", ("Statted [%s,%s,%d,%ld]", name, lib, sym, res) ); DB_RETURN( res ); } #define DO_STAT(A,B,C,D) _do_stat(A,B,C,D) #else #define DO_STAT(A,B,C,D) Do_stat(A,B,C,D) #endif static char *_first; /* If set this variable saves the first pathname that was * used to stat the target in, if subsequently a match is * found it is overridden by the matched path name. */ PUBLIC void Stat_target( cp, setfname, force )/* ==================================== Stat a target. When doing so follow the following rules, suppose that cp->CE_NAME points at a target called fred.o: (See also man page: BINDING TARGETS) 0. If A_SYMBOL attribute set look into the library then do the steps 1 thru 4 on the resulting name. 1. Try path's obtained by prepending any dirs found as prerequisites for .SOURCE.o. 2. If not found, do same as 2 but use .SOURCE The predefined '.SOURCE : .NULL' targets takes care of local/absolute paths. 3. If not found and .LIBRARYM attribute for the target is set then look for it in the corresponding library. 4. If found in step 0 thru 3, then ce_fname points at file name associate with target, else ce_fname points at a file name built by the first .SOURCE* dir that applied. If setfname is != 0 this tells _check_dir_list() to set the static _first variable. setfname also controls the use of _first. If it is -1 ce_fname (the file name associated with target) is only set if a matching file was found and statted, if it is 1 ce_fname is set to _first even if target doesn't exist yet. If force is TRUE really stat the target. Do not use the directory cache but update the files entry if it's enabled. */ CELLPTR cp; int setfname; int force; { register HASHPTR hp; static HASHPTR srchp = NIL(HASH); char *name; char *tmp; int res = 0; DB_ENTER( "Stat_target" ); name = cp->CE_NAME; if( srchp == NIL(HASH) ) srchp = Get_name(".SOURCE",Defs,FALSE); /* Look for a symbol of the form lib((symbol)) the name of the symbol * as entered in the hash table is (symbol) so pull out symbol and try * to find it's module. If successful DO_STAT will return the module * as well as the archive member name (pointed at by tmp). We then * replace the symbol name with the archive member name so that we * have the proper name for any future refrences. */ if( cp->ce_attr & A_SYMBOL ) { DB_PRINT( "stat", ("Binding lib symbol [%s]", name) ); cp->ce_time = DO_STAT( name, cp->ce_lib, &tmp, force ); if( cp->ce_time != (time_t) 0L ) { /* stat the new member name below note tmp must point at a string * returned by MALLOC... ie. the Do_stat code should use DmStrDup */ if( Verbose & V_MAKE ) printf( "%s: Mapped ((%s)) to %s(%s)\n", Pname, name, cp->ce_lib, tmp ); FREE( name ); name = cp->CE_NAME = tmp; cp->ce_attr &= ~(A_FFNAME | A_SYMBOL); } else { DB_VOID_RETURN; } } _first = NIL(char); tmp = DmStrJoin( ".SOURCE", Get_suffix(name), -1, FALSE); /* Check .SOURCE.xxx target */ if( (hp = Get_name(tmp, Defs, FALSE)) != NIL(HASH) ) res = _check_dir_list( cp, hp->CP_OWNR, setfname, force ); /* Check just .SOURCE */ if( !res && (srchp != NIL(HASH)) ) res = _check_dir_list( cp, srchp->CP_OWNR, setfname, force ); /* If libmember and we haven't found it check the library */ if( !res && (cp->ce_attr & A_LIBRARYM) ) { cp->ce_time = DO_STAT(name, cp->ce_lib, NIL(char *), force); if( !cp->ce_time && Tmd && *Tmd && cp->ce_lib ) { char *tmplib; tmplib=DmStrDup(Build_path(Tmd,cp->ce_lib)); if ((cp->ce_time = DO_STAT(name, tmplib, NIL(char *),force)) != (time_t)0L){ cp->ce_lib=DmStrDup(tmplib); } } if( Verbose & V_MAKE ) printf( "%s: Checking library '%s' for member [%s], time %ld\n", Pname, cp->ce_lib, name, cp->ce_time ); } FREE( tmp ); if( setfname == 1 || (setfname == -1 && cp->ce_time != (time_t)0L) ) { int setlib = (cp->ce_lib == cp->ce_fname); if( (cp->ce_attr & A_FFNAME) && (cp->ce_fname != NIL(char)) ) FREE( cp->ce_fname ); if( _first != NIL(char) ) { cp->ce_fname = _first; cp->ce_attr |= A_FFNAME; } else { cp->ce_fname = cp->CE_NAME; cp->ce_attr &= ~A_FFNAME; } if ( setlib ) cp->ce_lib = cp->ce_fname; } else if( _first ) FREE( _first ); /* set it as stated only if successful, this way, we shall try again * later. */ if( cp->ce_time != (time_t)0L ) { cp->ce_flag |= F_STAT; /* If it is a whatif this changed scenario then return the current * time, but do so only if the stat was successful. */ if ( (cp->ce_attr & A_WHATIF) && !(cp->ce_flag & F_MADE) ) { cp->ce_time = Do_time(); } } DB_VOID_RETURN; } static int _check_dir_list( cp, sp, setfname, force )/* ============================================ Check the list of dir's given by the prerequisite list of sp, for a file pointed at by cp. Returns 0 if path not bound, else returns 1 and replaces old name for cell with new cell name. */ CELLPTR cp; CELLPTR sp; int setfname; int force; { /* FIXME: BCC 5.0 BUG??? If lp is assigned to a register variable then * BCC 5.0 corrupts a field of the member structure when DO_STAT * calls the native win95 stat system call. Blech!!! * * Making this a static variable forces it out of a register and * seems to avoid the problem. */ static LINKPTR lp; char *dir; char *path; char *name; int res = 0; int fset = 0; DB_ENTER( "_check_dir_list" ); DB_PRINT( "mem", ("%s:-> mem %ld", cp->CE_NAME, (long) coreleft()) ); if( sp->ce_prq != NIL(LINK) ) /* check prerequisites if any */ { /* Use the real name instead of basename, this prevents silly * loops in inference code, and is consistent with man page */ name = cp->CE_NAME; /* Here we loop through each directory on the list, and try to stat * the target. We always save the first pathname we try to stat in * _first. If we subsequently get a match we then replace the value of * _first by the matched path name. */ for( lp=sp->CE_PRQ; lp != NIL(LINK) && !res; lp=lp->cl_next ) { int nodup = 0; dir = lp->cl_prq->CE_NAME; if( strchr( dir, '$' ) ) dir = Expand(dir); if( strcmp( dir, ".NULL" ) == 0 ) { nodup = 1; path = cp->CE_NAME; } else { path = DmStrDup(Build_path(dir,name)); } res = ((cp->ce_time=DO_STAT(path,NIL(char),NIL(char *),force))!=(time_t)0L); /* Have to use DmStrDup to set _first since Build_path, builds it's * path names inside a static buffer. */ if( setfname ) if( (_first == NIL(char) && !fset) || res ) { if( _first != NIL(char) ) FREE( _first ); if (nodup) _first = NIL(char); else { _first = path; path = NIL(char); } fset = 1; } DB_PRINT( "stat", ("_first [%s], path [%s]", _first, path) ); if( dir != lp->cl_prq->CE_NAME ) FREE(dir); if( path && path != cp->CE_NAME ) FREE(path); } } DB_PRINT( "mem", ("%s:-< mem %ld", cp->CE_NAME, (long) coreleft()) ); DB_RETURN( res ); }