2dab142d47
problems in the process: 1. Quoting should work properly now. In particular, Chet's reported bash make problem has gone away. 2. A lot of memory that just wasn't being free'd after use is now freed. This should cause make to take up a LOT less memory when dealing with archive targets. 3. Give proper credit to Adam de Boor in a number of files. Obtained from: NetBSD (and Adam de Boor)
1275 lines
38 KiB
C
1275 lines
38 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
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* Copyright (c) 1988, 1989 by Adam de Boor
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)dir.c 8.2 (Berkeley) 1/2/94";
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#endif /* not lint */
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/*-
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* dir.c --
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* Directory searching using wildcards and/or normal names...
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* Used both for source wildcarding in the Makefile and for finding
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* implicit sources.
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*
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* The interface for this module is:
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* Dir_Init Initialize the module.
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*
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* Dir_End Cleanup the module.
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*
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* Dir_HasWildcards Returns TRUE if the name given it needs to
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* be wildcard-expanded.
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*
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* Dir_Expand Given a pattern and a path, return a Lst of names
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* which match the pattern on the search path.
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*
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* Dir_FindFile Searches for a file on a given search path.
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* If it exists, the entire path is returned.
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* Otherwise NULL is returned.
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*
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* Dir_MTime Return the modification time of a node. The file
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* is searched for along the default search path.
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* The path and mtime fields of the node are filled
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* in.
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*
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* Dir_AddDir Add a directory to a search path.
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*
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* Dir_MakeFlags Given a search path and a command flag, create
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* a string with each of the directories in the path
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* preceded by the command flag and all of them
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* separated by a space.
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*
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* Dir_Destroy Destroy an element of a search path. Frees up all
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* things that can be freed for the element as long
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* as the element is no longer referenced by any other
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* search path.
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* Dir_ClearPath Resets a search path to the empty list.
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*
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* For debugging:
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* Dir_PrintDirectories Print stats about the directory cache.
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include "make.h"
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#include "hash.h"
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#include "dir.h"
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/*
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* A search path consists of a Lst of Path structures. A Path structure
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* has in it the name of the directory and a hash table of all the files
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* in the directory. This is used to cut down on the number of system
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* calls necessary to find implicit dependents and their like. Since
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* these searches are made before any actions are taken, we need not
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* worry about the directory changing due to creation commands. If this
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* hampers the style of some makefiles, they must be changed.
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*
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* A list of all previously-read directories is kept in the
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* openDirectories Lst. This list is checked first before a directory
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* is opened.
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*
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* The need for the caching of whole directories is brought about by
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* the multi-level transformation code in suff.c, which tends to search
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* for far more files than regular make does. In the initial
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* implementation, the amount of time spent performing "stat" calls was
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* truly astronomical. The problem with hashing at the start is,
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* of course, that pmake doesn't then detect changes to these directories
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* during the course of the make. Three possibilities suggest themselves:
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*
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* 1) just use stat to test for a file's existence. As mentioned
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* above, this is very inefficient due to the number of checks
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* engendered by the multi-level transformation code.
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* 2) use readdir() and company to search the directories, keeping
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* them open between checks. I have tried this and while it
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* didn't slow down the process too much, it could severely
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* affect the amount of parallelism available as each directory
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* open would take another file descriptor out of play for
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* handling I/O for another job. Given that it is only recently
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* that UNIX OS's have taken to allowing more than 20 or 32
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* file descriptors for a process, this doesn't seem acceptable
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* to me.
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* 3) record the mtime of the directory in the Path structure and
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* verify the directory hasn't changed since the contents were
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* hashed. This will catch the creation or deletion of files,
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* but not the updating of files. However, since it is the
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* creation and deletion that is the problem, this could be
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* a good thing to do. Unfortunately, if the directory (say ".")
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* were fairly large and changed fairly frequently, the constant
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* rehashing could seriously degrade performance. It might be
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* good in such cases to keep track of the number of rehashes
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* and if the number goes over a (small) limit, resort to using
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* stat in its place.
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*
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* An additional thing to consider is that pmake is used primarily
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* to create C programs and until recently pcc-based compilers refused
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* to allow you to specify where the resulting object file should be
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* placed. This forced all objects to be created in the current
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* directory. This isn't meant as a full excuse, just an explanation of
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* some of the reasons for the caching used here.
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*
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* One more note: the location of a target's file is only performed
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* on the downward traversal of the graph and then only for terminal
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* nodes in the graph. This could be construed as wrong in some cases,
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* but prevents inadvertent modification of files when the "installed"
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* directory for a file is provided in the search path.
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*
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* Another data structure maintained by this module is an mtime
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* cache used when the searching of cached directories fails to find
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* a file. In the past, Dir_FindFile would simply perform an access()
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* call in such a case to determine if the file could be found using
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* just the name given. When this hit, however, all that was gained
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* was the knowledge that the file existed. Given that an access() is
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* essentially a stat() without the copyout() call, and that the same
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* filesystem overhead would have to be incurred in Dir_MTime, it made
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* sense to replace the access() with a stat() and record the mtime
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* in a cache for when Dir_MTime was actually called.
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*/
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Lst dirSearchPath; /* main search path */
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static Lst openDirectories; /* the list of all open directories */
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/*
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* Variables for gathering statistics on the efficiency of the hashing
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* mechanism.
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*/
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static int hits, /* Found in directory cache */
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misses, /* Sad, but not evil misses */
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nearmisses, /* Found under search path */
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bigmisses; /* Sought by itself */
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static Path *dot; /* contents of current directory */
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static Hash_Table mtimes; /* Results of doing a last-resort stat in
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* Dir_FindFile -- if we have to go to the
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* system to find the file, we might as well
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* have its mtime on record. XXX: If this is done
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* way early, there's a chance other rules will
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* have already updated the file, in which case
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* we'll update it again. Generally, there won't
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* be two rules to update a single file, so this
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* should be ok, but... */
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static int DirFindName __P((ClientData, ClientData));
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static int DirMatchFiles __P((char *, Path *, Lst));
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static void DirExpandCurly __P((char *, char *, Lst, Lst));
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static void DirExpandInt __P((char *, Lst, Lst));
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static int DirPrintWord __P((ClientData, ClientData));
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static int DirPrintDir __P((ClientData, ClientData));
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/*-
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*-----------------------------------------------------------------------
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* Dir_Init --
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* initialize things for this module
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*
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* Results:
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* none
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*
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* Side Effects:
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* some directories may be opened.
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*-----------------------------------------------------------------------
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*/
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void
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Dir_Init ()
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{
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dirSearchPath = Lst_Init (FALSE);
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openDirectories = Lst_Init (FALSE);
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Hash_InitTable(&mtimes, 0);
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/*
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* Since the Path structure is placed on both openDirectories and
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* the path we give Dir_AddDir (which in this case is openDirectories),
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* we need to remove "." from openDirectories and what better time to
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* do it than when we have to fetch the thing anyway?
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*/
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Dir_AddDir (openDirectories, ".");
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dot = (Path *) Lst_DeQueue (openDirectories);
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/*
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* We always need to have dot around, so we increment its reference count
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* to make sure it's not destroyed.
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*/
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dot->refCount += 1;
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}
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/*-
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*-----------------------------------------------------------------------
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* Dir_End --
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* cleanup things for this module
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*
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* Results:
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* none
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*
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* Side Effects:
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* none
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*-----------------------------------------------------------------------
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*/
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void
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Dir_End()
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{
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dot->refCount -= 1;
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Dir_Destroy((ClientData) dot);
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Dir_ClearPath(dirSearchPath);
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Lst_Destroy(dirSearchPath, NOFREE);
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Dir_ClearPath(openDirectories);
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Lst_Destroy(openDirectories, NOFREE);
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Hash_DeleteTable(&mtimes);
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}
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/*-
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*-----------------------------------------------------------------------
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* DirFindName --
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* See if the Path structure describes the same directory as the
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* given one by comparing their names. Called from Dir_AddDir via
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* Lst_Find when searching the list of open directories.
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*
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* Results:
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* 0 if it is the same. Non-zero otherwise
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*
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* Side Effects:
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* None
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*-----------------------------------------------------------------------
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*/
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static int
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DirFindName (p, dname)
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ClientData p; /* Current name */
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ClientData dname; /* Desired name */
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{
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return (strcmp (((Path *)p)->name, (char *) dname));
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}
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/*-
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*-----------------------------------------------------------------------
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* Dir_HasWildcards --
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* see if the given name has any wildcard characters in it
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*
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* Results:
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* returns TRUE if the word should be expanded, FALSE otherwise
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*
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* Side Effects:
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* none
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*-----------------------------------------------------------------------
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*/
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Boolean
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Dir_HasWildcards (name)
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char *name; /* name to check */
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{
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register char *cp;
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for (cp = name; *cp; cp++) {
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switch(*cp) {
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case '{':
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case '[':
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case '?':
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case '*':
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return (TRUE);
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}
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}
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return (FALSE);
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}
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|
/*-
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*-----------------------------------------------------------------------
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* DirMatchFiles --
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* Given a pattern and a Path structure, see if any files
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* match the pattern and add their names to the 'expansions' list if
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* any do. This is incomplete -- it doesn't take care of patterns like
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* src / *src / *.c properly (just *.c on any of the directories), but it
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* will do for now.
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*
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* Results:
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* Always returns 0
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*
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* Side Effects:
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* File names are added to the expansions lst. The directory will be
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* fully hashed when this is done.
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*-----------------------------------------------------------------------
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*/
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static int
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DirMatchFiles (pattern, p, expansions)
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char *pattern; /* Pattern to look for */
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Path *p; /* Directory to search */
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Lst expansions; /* Place to store the results */
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{
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Hash_Search search; /* Index into the directory's table */
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Hash_Entry *entry; /* Current entry in the table */
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Boolean isDot; /* TRUE if the directory being searched is . */
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isDot = (*p->name == '.' && p->name[1] == '\0');
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|
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for (entry = Hash_EnumFirst(&p->files, &search);
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entry != (Hash_Entry *)NULL;
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entry = Hash_EnumNext(&search))
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{
|
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/*
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* See if the file matches the given pattern. Note we follow the UNIX
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* convention that dot files will only be found if the pattern
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* begins with a dot (note also that as a side effect of the hashing
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* scheme, .* won't match . or .. since they aren't hashed).
|
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*/
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if (Str_Match(entry->name, pattern) &&
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((entry->name[0] != '.') ||
|
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(pattern[0] == '.')))
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{
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(void)Lst_AtEnd(expansions,
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(isDot ? strdup(entry->name) :
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str_concat(p->name, entry->name,
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STR_ADDSLASH)));
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}
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}
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return (0);
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}
|
|
|
|
/*-
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*-----------------------------------------------------------------------
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|
* DirExpandCurly --
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* Expand curly braces like the C shell. Does this recursively.
|
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* Note the special case: if after the piece of the curly brace is
|
|
* done there are no wildcard characters in the result, the result is
|
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* placed on the list WITHOUT CHECKING FOR ITS EXISTENCE.
|
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*
|
|
* Results:
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* None.
|
|
*
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* Side Effects:
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* The given list is filled with the expansions...
|
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*
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*-----------------------------------------------------------------------
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*/
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static void
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DirExpandCurly(word, brace, path, expansions)
|
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char *word; /* Entire word to expand */
|
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char *brace; /* First curly brace in it */
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Lst path; /* Search path to use */
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Lst expansions; /* Place to store the expansions */
|
|
{
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|
char *end; /* Character after the closing brace */
|
|
char *cp; /* Current position in brace clause */
|
|
char *start; /* Start of current piece of brace clause */
|
|
int bracelevel; /* Number of braces we've seen. If we see a
|
|
* right brace when this is 0, we've hit the
|
|
* end of the clause. */
|
|
char *file; /* Current expansion */
|
|
int otherLen; /* The length of the other pieces of the
|
|
* expansion (chars before and after the
|
|
* clause in 'word') */
|
|
char *cp2; /* Pointer for checking for wildcards in
|
|
* expansion before calling Dir_Expand */
|
|
|
|
start = brace+1;
|
|
|
|
/*
|
|
* Find the end of the brace clause first, being wary of nested brace
|
|
* clauses.
|
|
*/
|
|
for (end = start, bracelevel = 0; *end != '\0'; end++) {
|
|
if (*end == '{') {
|
|
bracelevel++;
|
|
} else if ((*end == '}') && (bracelevel-- == 0)) {
|
|
break;
|
|
}
|
|
}
|
|
if (*end == '\0') {
|
|
Error("Unterminated {} clause \"%s\"", start);
|
|
return;
|
|
} else {
|
|
end++;
|
|
}
|
|
otherLen = brace - word + strlen(end);
|
|
|
|
for (cp = start; cp < end; cp++) {
|
|
/*
|
|
* Find the end of this piece of the clause.
|
|
*/
|
|
bracelevel = 0;
|
|
while (*cp != ',') {
|
|
if (*cp == '{') {
|
|
bracelevel++;
|
|
} else if ((*cp == '}') && (bracelevel-- <= 0)) {
|
|
break;
|
|
}
|
|
cp++;
|
|
}
|
|
/*
|
|
* Allocate room for the combination and install the three pieces.
|
|
*/
|
|
file = emalloc(otherLen + cp - start + 1);
|
|
if (brace != word) {
|
|
strncpy(file, word, brace-word);
|
|
}
|
|
if (cp != start) {
|
|
strncpy(&file[brace-word], start, cp-start);
|
|
}
|
|
strcpy(&file[(brace-word)+(cp-start)], end);
|
|
|
|
/*
|
|
* See if the result has any wildcards in it. If we find one, call
|
|
* Dir_Expand right away, telling it to place the result on our list
|
|
* of expansions.
|
|
*/
|
|
for (cp2 = file; *cp2 != '\0'; cp2++) {
|
|
switch(*cp2) {
|
|
case '*':
|
|
case '?':
|
|
case '{':
|
|
case '[':
|
|
Dir_Expand(file, path, expansions);
|
|
goto next;
|
|
}
|
|
}
|
|
if (*cp2 == '\0') {
|
|
/*
|
|
* Hit the end w/o finding any wildcards, so stick the expansion
|
|
* on the end of the list.
|
|
*/
|
|
(void)Lst_AtEnd(expansions, file);
|
|
} else {
|
|
next:
|
|
free(file);
|
|
}
|
|
start = cp+1;
|
|
}
|
|
}
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* DirExpandInt --
|
|
* Internal expand routine. Passes through the directories in the
|
|
* path one by one, calling DirMatchFiles for each. NOTE: This still
|
|
* doesn't handle patterns in directories...
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* Things are added to the expansions list.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static void
|
|
DirExpandInt(word, path, expansions)
|
|
char *word; /* Word to expand */
|
|
Lst path; /* Path on which to look */
|
|
Lst expansions; /* Place to store the result */
|
|
{
|
|
LstNode ln; /* Current node */
|
|
Path *p; /* Directory in the node */
|
|
|
|
if (Lst_Open(path) == SUCCESS) {
|
|
while ((ln = Lst_Next(path)) != NILLNODE) {
|
|
p = (Path *)Lst_Datum(ln);
|
|
DirMatchFiles(word, p, expansions);
|
|
}
|
|
Lst_Close(path);
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* DirPrintWord --
|
|
* Print a word in the list of expansions. Callback for Dir_Expand
|
|
* when DEBUG(DIR), via Lst_ForEach.
|
|
*
|
|
* Results:
|
|
* === 0
|
|
*
|
|
* Side Effects:
|
|
* The passed word is printed, followed by a space.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static int
|
|
DirPrintWord(word, dummy)
|
|
ClientData word;
|
|
ClientData dummy;
|
|
{
|
|
printf("%s ", (char *) word);
|
|
|
|
return(dummy ? 0 : 0);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_Expand --
|
|
* Expand the given word into a list of words by globbing it looking
|
|
* in the directories on the given search path.
|
|
*
|
|
* Results:
|
|
* A list of words consisting of the files which exist along the search
|
|
* path matching the given pattern.
|
|
*
|
|
* Side Effects:
|
|
* Directories may be opened. Who knows?
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Dir_Expand (word, path, expansions)
|
|
char *word; /* the word to expand */
|
|
Lst path; /* the list of directories in which to find
|
|
* the resulting files */
|
|
Lst expansions; /* the list on which to place the results */
|
|
{
|
|
char *cp;
|
|
|
|
if (DEBUG(DIR)) {
|
|
printf("expanding \"%s\"...", word);
|
|
}
|
|
|
|
cp = strchr(word, '{');
|
|
if (cp) {
|
|
DirExpandCurly(word, cp, path, expansions);
|
|
} else {
|
|
cp = strchr(word, '/');
|
|
if (cp) {
|
|
/*
|
|
* The thing has a directory component -- find the first wildcard
|
|
* in the string.
|
|
*/
|
|
for (cp = word; *cp; cp++) {
|
|
if (*cp == '?' || *cp == '[' || *cp == '*' || *cp == '{') {
|
|
break;
|
|
}
|
|
}
|
|
if (*cp == '{') {
|
|
/*
|
|
* This one will be fun.
|
|
*/
|
|
DirExpandCurly(word, cp, path, expansions);
|
|
return;
|
|
} else if (*cp != '\0') {
|
|
/*
|
|
* Back up to the start of the component
|
|
*/
|
|
char *dirpath;
|
|
|
|
while (cp > word && *cp != '/') {
|
|
cp--;
|
|
}
|
|
if (cp != word) {
|
|
char sc;
|
|
/*
|
|
* If the glob isn't in the first component, try and find
|
|
* all the components up to the one with a wildcard.
|
|
*/
|
|
sc = cp[1];
|
|
cp[1] = '\0';
|
|
dirpath = Dir_FindFile(word, path);
|
|
cp[1] = sc;
|
|
/*
|
|
* dirpath is null if can't find the leading component
|
|
* XXX: Dir_FindFile won't find internal components.
|
|
* i.e. if the path contains ../Etc/Object and we're
|
|
* looking for Etc, it won't be found. Ah well.
|
|
* Probably not important.
|
|
*/
|
|
if (dirpath != (char *)NULL) {
|
|
char *dp = &dirpath[strlen(dirpath) - 1];
|
|
if (*dp == '/')
|
|
*dp = '\0';
|
|
path = Lst_Init(FALSE);
|
|
Dir_AddDir(path, dirpath);
|
|
DirExpandInt(cp+1, path, expansions);
|
|
Lst_Destroy(path, NOFREE);
|
|
}
|
|
} else {
|
|
/*
|
|
* Start the search from the local directory
|
|
*/
|
|
DirExpandInt(word, path, expansions);
|
|
}
|
|
} else {
|
|
/*
|
|
* Return the file -- this should never happen.
|
|
*/
|
|
DirExpandInt(word, path, expansions);
|
|
}
|
|
} else {
|
|
/*
|
|
* First the files in dot
|
|
*/
|
|
DirMatchFiles(word, dot, expansions);
|
|
|
|
/*
|
|
* Then the files in every other directory on the path.
|
|
*/
|
|
DirExpandInt(word, path, expansions);
|
|
}
|
|
}
|
|
if (DEBUG(DIR)) {
|
|
Lst_ForEach(expansions, DirPrintWord, (ClientData) 0);
|
|
fputc('\n', stdout);
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_FindFile --
|
|
* Find the file with the given name along the given search path.
|
|
*
|
|
* Results:
|
|
* The path to the file or NULL. This path is guaranteed to be in a
|
|
* different part of memory than name and so may be safely free'd.
|
|
*
|
|
* Side Effects:
|
|
* If the file is found in a directory which is not on the path
|
|
* already (either 'name' is absolute or it is a relative path
|
|
* [ dir1/.../dirn/file ] which exists below one of the directories
|
|
* already on the search path), its directory is added to the end
|
|
* of the path on the assumption that there will be more files in
|
|
* that directory later on. Sometimes this is true. Sometimes not.
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Dir_FindFile (name, path)
|
|
char *name; /* the file to find */
|
|
Lst path; /* the Lst of directories to search */
|
|
{
|
|
register char *p1; /* pointer into p->name */
|
|
register char *p2; /* pointer into name */
|
|
LstNode ln; /* a list element */
|
|
register char *file; /* the current filename to check */
|
|
register Path *p; /* current path member */
|
|
register char *cp; /* index of first slash, if any */
|
|
Boolean hasSlash; /* true if 'name' contains a / */
|
|
struct stat stb; /* Buffer for stat, if necessary */
|
|
Hash_Entry *entry; /* Entry for mtimes table */
|
|
|
|
/*
|
|
* Find the final component of the name and note whether it has a
|
|
* slash in it (the name, I mean)
|
|
*/
|
|
cp = strrchr (name, '/');
|
|
if (cp) {
|
|
hasSlash = TRUE;
|
|
cp += 1;
|
|
} else {
|
|
hasSlash = FALSE;
|
|
cp = name;
|
|
}
|
|
|
|
if (DEBUG(DIR)) {
|
|
printf("Searching for %s...", name);
|
|
}
|
|
/*
|
|
* No matter what, we always look for the file in the current directory
|
|
* before anywhere else and we *do not* add the ./ to it if it exists.
|
|
* This is so there are no conflicts between what the user specifies
|
|
* (fish.c) and what pmake finds (./fish.c).
|
|
*/
|
|
if ((!hasSlash || (cp - name == 2 && *name == '.')) &&
|
|
(Hash_FindEntry (&dot->files, cp) != (Hash_Entry *)NULL)) {
|
|
if (DEBUG(DIR)) {
|
|
printf("in '.'\n");
|
|
}
|
|
hits += 1;
|
|
dot->hits += 1;
|
|
return (strdup (name));
|
|
}
|
|
|
|
if (Lst_Open (path) == FAILURE) {
|
|
if (DEBUG(DIR)) {
|
|
printf("couldn't open path, file not found\n");
|
|
}
|
|
misses += 1;
|
|
return ((char *) NULL);
|
|
}
|
|
|
|
/*
|
|
* We look through all the directories on the path seeking one which
|
|
* contains the final component of the given name and whose final
|
|
* component(s) match the name's initial component(s). If such a beast
|
|
* is found, we concatenate the directory name and the final component
|
|
* and return the resulting string. If we don't find any such thing,
|
|
* we go on to phase two...
|
|
*/
|
|
while ((ln = Lst_Next (path)) != NILLNODE) {
|
|
p = (Path *) Lst_Datum (ln);
|
|
if (DEBUG(DIR)) {
|
|
printf("%s...", p->name);
|
|
}
|
|
if (Hash_FindEntry (&p->files, cp) != (Hash_Entry *)NULL) {
|
|
if (DEBUG(DIR)) {
|
|
printf("here...");
|
|
}
|
|
if (hasSlash) {
|
|
/*
|
|
* If the name had a slash, its initial components and p's
|
|
* final components must match. This is false if a mismatch
|
|
* is encountered before all of the initial components
|
|
* have been checked (p2 > name at the end of the loop), or
|
|
* we matched only part of one of the components of p
|
|
* along with all the rest of them (*p1 != '/').
|
|
*/
|
|
p1 = p->name + strlen (p->name) - 1;
|
|
p2 = cp - 2;
|
|
while (p2 >= name && p1 >= p->name && *p1 == *p2) {
|
|
p1 -= 1; p2 -= 1;
|
|
}
|
|
if (p2 >= name || (p1 >= p->name && *p1 != '/')) {
|
|
if (DEBUG(DIR)) {
|
|
printf("component mismatch -- continuing...");
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
file = str_concat (p->name, cp, STR_ADDSLASH);
|
|
if (DEBUG(DIR)) {
|
|
printf("returning %s\n", file);
|
|
}
|
|
Lst_Close (path);
|
|
p->hits += 1;
|
|
hits += 1;
|
|
return (file);
|
|
} else if (hasSlash) {
|
|
/*
|
|
* If the file has a leading path component and that component
|
|
* exactly matches the entire name of the current search
|
|
* directory, we assume the file doesn't exist and return NULL.
|
|
*/
|
|
for (p1 = p->name, p2 = name; *p1 && *p1 == *p2; p1++, p2++) {
|
|
continue;
|
|
}
|
|
if (*p1 == '\0' && p2 == cp - 1) {
|
|
if (DEBUG(DIR)) {
|
|
printf("must be here but isn't -- returing NULL\n");
|
|
}
|
|
Lst_Close (path);
|
|
return ((char *) NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We didn't find the file on any existing members of the directory.
|
|
* If the name doesn't contain a slash, that means it doesn't exist.
|
|
* If it *does* contain a slash, however, there is still hope: it
|
|
* could be in a subdirectory of one of the members of the search
|
|
* path. (eg. /usr/include and sys/types.h. The above search would
|
|
* fail to turn up types.h in /usr/include, but it *is* in
|
|
* /usr/include/sys/types.h) If we find such a beast, we assume there
|
|
* will be more (what else can we assume?) and add all but the last
|
|
* component of the resulting name onto the search path (at the
|
|
* end). This phase is only performed if the file is *not* absolute.
|
|
*/
|
|
if (!hasSlash) {
|
|
if (DEBUG(DIR)) {
|
|
printf("failed.\n");
|
|
}
|
|
misses += 1;
|
|
return ((char *) NULL);
|
|
}
|
|
|
|
if (*name != '/') {
|
|
Boolean checkedDot = FALSE;
|
|
|
|
if (DEBUG(DIR)) {
|
|
printf("failed. Trying subdirectories...");
|
|
}
|
|
(void) Lst_Open (path);
|
|
while ((ln = Lst_Next (path)) != NILLNODE) {
|
|
p = (Path *) Lst_Datum (ln);
|
|
if (p != dot) {
|
|
file = str_concat (p->name, name, STR_ADDSLASH);
|
|
} else {
|
|
/*
|
|
* Checking in dot -- DON'T put a leading ./ on the thing.
|
|
*/
|
|
file = strdup(name);
|
|
checkedDot = TRUE;
|
|
}
|
|
if (DEBUG(DIR)) {
|
|
printf("checking %s...", file);
|
|
}
|
|
|
|
|
|
if (stat (file, &stb) == 0) {
|
|
if (DEBUG(DIR)) {
|
|
printf("got it.\n");
|
|
}
|
|
|
|
Lst_Close (path);
|
|
|
|
/*
|
|
* We've found another directory to search. We know there's
|
|
* a slash in 'file' because we put one there. We nuke it after
|
|
* finding it and call Dir_AddDir to add this new directory
|
|
* onto the existing search path. Once that's done, we restore
|
|
* the slash and triumphantly return the file name, knowing
|
|
* that should a file in this directory every be referenced
|
|
* again in such a manner, we will find it without having to do
|
|
* numerous numbers of access calls. Hurrah!
|
|
*/
|
|
cp = strrchr (file, '/');
|
|
*cp = '\0';
|
|
Dir_AddDir (path, file);
|
|
*cp = '/';
|
|
|
|
/*
|
|
* Save the modification time so if it's needed, we don't have
|
|
* to fetch it again.
|
|
*/
|
|
if (DEBUG(DIR)) {
|
|
printf("Caching %s for %s\n", Targ_FmtTime(stb.st_mtime),
|
|
file);
|
|
}
|
|
entry = Hash_CreateEntry(&mtimes, (char *) file,
|
|
(Boolean *)NULL);
|
|
Hash_SetValue(entry, (long)stb.st_mtime);
|
|
nearmisses += 1;
|
|
return (file);
|
|
} else {
|
|
free (file);
|
|
}
|
|
}
|
|
|
|
if (DEBUG(DIR)) {
|
|
printf("failed. ");
|
|
}
|
|
Lst_Close (path);
|
|
|
|
if (checkedDot) {
|
|
/*
|
|
* Already checked by the given name, since . was in the path,
|
|
* so no point in proceeding...
|
|
*/
|
|
if (DEBUG(DIR)) {
|
|
printf("Checked . already, returning NULL\n");
|
|
}
|
|
return(NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Didn't find it that way, either. Sigh. Phase 3. Add its directory
|
|
* onto the search path in any case, just in case, then look for the
|
|
* thing in the hash table. If we find it, grand. We return a new
|
|
* copy of the name. Otherwise we sadly return a NULL pointer. Sigh.
|
|
* Note that if the directory holding the file doesn't exist, this will
|
|
* do an extra search of the final directory on the path. Unless something
|
|
* weird happens, this search won't succeed and life will be groovy.
|
|
*
|
|
* Sigh. We cannot add the directory onto the search path because
|
|
* of this amusing case:
|
|
* $(INSTALLDIR)/$(FILE): $(FILE)
|
|
*
|
|
* $(FILE) exists in $(INSTALLDIR) but not in the current one.
|
|
* When searching for $(FILE), we will find it in $(INSTALLDIR)
|
|
* b/c we added it here. This is not good...
|
|
*/
|
|
#ifdef notdef
|
|
cp[-1] = '\0';
|
|
Dir_AddDir (path, name);
|
|
cp[-1] = '/';
|
|
|
|
bigmisses += 1;
|
|
ln = Lst_Last (path);
|
|
if (ln == NILLNODE) {
|
|
return ((char *) NULL);
|
|
} else {
|
|
p = (Path *) Lst_Datum (ln);
|
|
}
|
|
|
|
if (Hash_FindEntry (&p->files, cp) != (Hash_Entry *)NULL) {
|
|
return (strdup (name));
|
|
} else {
|
|
return ((char *) NULL);
|
|
}
|
|
#else /* !notdef */
|
|
if (DEBUG(DIR)) {
|
|
printf("Looking for \"%s\"...", name);
|
|
}
|
|
|
|
bigmisses += 1;
|
|
entry = Hash_FindEntry(&mtimes, name);
|
|
if (entry != (Hash_Entry *)NULL) {
|
|
if (DEBUG(DIR)) {
|
|
printf("got it (in mtime cache)\n");
|
|
}
|
|
return(strdup(name));
|
|
} else if (stat (name, &stb) == 0) {
|
|
entry = Hash_CreateEntry(&mtimes, name, (Boolean *)NULL);
|
|
if (DEBUG(DIR)) {
|
|
printf("Caching %s for %s\n", Targ_FmtTime(stb.st_mtime),
|
|
name);
|
|
}
|
|
Hash_SetValue(entry, (long)stb.st_mtime);
|
|
return (strdup (name));
|
|
} else {
|
|
if (DEBUG(DIR)) {
|
|
printf("failed. Returning NULL\n");
|
|
}
|
|
return ((char *)NULL);
|
|
}
|
|
#endif /* notdef */
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_MTime --
|
|
* Find the modification time of the file described by gn along the
|
|
* search path dirSearchPath.
|
|
*
|
|
* Results:
|
|
* The modification time or 0 if it doesn't exist
|
|
*
|
|
* Side Effects:
|
|
* The modification time is placed in the node's mtime slot.
|
|
* If the node didn't have a path entry before, and Dir_FindFile
|
|
* found one for it, the full name is placed in the path slot.
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
int
|
|
Dir_MTime (gn)
|
|
GNode *gn; /* the file whose modification time is
|
|
* desired */
|
|
{
|
|
char *fullName; /* the full pathname of name */
|
|
struct stat stb; /* buffer for finding the mod time */
|
|
Hash_Entry *entry;
|
|
|
|
if (gn->type & OP_ARCHV) {
|
|
return Arch_MTime (gn);
|
|
} else if (gn->path == (char *)NULL) {
|
|
fullName = Dir_FindFile (gn->name, dirSearchPath);
|
|
} else {
|
|
fullName = gn->path;
|
|
}
|
|
|
|
if (fullName == (char *)NULL) {
|
|
fullName = strdup(gn->name);
|
|
}
|
|
|
|
entry = Hash_FindEntry(&mtimes, fullName);
|
|
if (entry != (Hash_Entry *)NULL) {
|
|
/*
|
|
* Only do this once -- the second time folks are checking to
|
|
* see if the file was actually updated, so we need to actually go
|
|
* to the file system.
|
|
*/
|
|
if (DEBUG(DIR)) {
|
|
printf("Using cached time %s for %s\n",
|
|
Targ_FmtTime((time_t)(long)Hash_GetValue(entry)), fullName);
|
|
}
|
|
stb.st_mtime = (time_t)(long)Hash_GetValue(entry);
|
|
Hash_DeleteEntry(&mtimes, entry);
|
|
} else if (stat (fullName, &stb) < 0) {
|
|
if (gn->type & OP_MEMBER) {
|
|
if (fullName != gn->path)
|
|
free(fullName);
|
|
return Arch_MemMTime (gn);
|
|
} else {
|
|
stb.st_mtime = 0;
|
|
}
|
|
}
|
|
if (fullName && gn->path == (char *)NULL) {
|
|
gn->path = fullName;
|
|
}
|
|
|
|
gn->mtime = stb.st_mtime;
|
|
return (gn->mtime);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_AddDir --
|
|
* Add the given name to the end of the given path. The order of
|
|
* the arguments is backwards so ParseDoDependency can do a
|
|
* Lst_ForEach of its list of paths...
|
|
*
|
|
* Results:
|
|
* none
|
|
*
|
|
* Side Effects:
|
|
* A structure is added to the list and the directory is
|
|
* read and hashed.
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Dir_AddDir (path, name)
|
|
Lst path; /* the path to which the directory should be
|
|
* added */
|
|
char *name; /* the name of the directory to add */
|
|
{
|
|
LstNode ln; /* node in case Path structure is found */
|
|
register Path *p; /* pointer to new Path structure */
|
|
DIR *d; /* for reading directory */
|
|
register struct dirent *dp; /* entry in directory */
|
|
|
|
ln = Lst_Find (openDirectories, (ClientData)name, DirFindName);
|
|
if (ln != NILLNODE) {
|
|
p = (Path *)Lst_Datum (ln);
|
|
if (Lst_Member(path, (ClientData)p) == NILLNODE) {
|
|
p->refCount += 1;
|
|
(void)Lst_AtEnd (path, (ClientData)p);
|
|
}
|
|
} else {
|
|
if (DEBUG(DIR)) {
|
|
printf("Caching %s...", name);
|
|
fflush(stdout);
|
|
}
|
|
|
|
if ((d = opendir (name)) != (DIR *) NULL) {
|
|
p = (Path *) emalloc (sizeof (Path));
|
|
p->name = strdup (name);
|
|
p->hits = 0;
|
|
p->refCount = 1;
|
|
Hash_InitTable (&p->files, -1);
|
|
|
|
/*
|
|
* Skip the first two entries -- these will *always* be . and ..
|
|
*/
|
|
(void)readdir(d);
|
|
(void)readdir(d);
|
|
|
|
while ((dp = readdir (d)) != (struct dirent *) NULL) {
|
|
#ifdef sun
|
|
/*
|
|
* The sun directory library doesn't check for a 0 inode
|
|
* (0-inode slots just take up space), so we have to do
|
|
* it ourselves.
|
|
*/
|
|
if (dp->d_fileno == 0) {
|
|
continue;
|
|
}
|
|
#endif /* sun */
|
|
(void)Hash_CreateEntry(&p->files, dp->d_name, (Boolean *)NULL);
|
|
}
|
|
(void) closedir (d);
|
|
(void)Lst_AtEnd (openDirectories, (ClientData)p);
|
|
(void)Lst_AtEnd (path, (ClientData)p);
|
|
}
|
|
if (DEBUG(DIR)) {
|
|
printf("done\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_CopyDir --
|
|
* Callback function for duplicating a search path via Lst_Duplicate.
|
|
* Ups the reference count for the directory.
|
|
*
|
|
* Results:
|
|
* Returns the Path it was given.
|
|
*
|
|
* Side Effects:
|
|
* The refCount of the path is incremented.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
ClientData
|
|
Dir_CopyDir(p)
|
|
ClientData p;
|
|
{
|
|
((Path *) p)->refCount += 1;
|
|
|
|
return ((ClientData)p);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_MakeFlags --
|
|
* Make a string by taking all the directories in the given search
|
|
* path and preceding them by the given flag. Used by the suffix
|
|
* module to create variables for compilers based on suffix search
|
|
* paths.
|
|
*
|
|
* Results:
|
|
* The string mentioned above. Note that there is no space between
|
|
* the given flag and each directory. The empty string is returned if
|
|
* Things don't go well.
|
|
*
|
|
* Side Effects:
|
|
* None
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Dir_MakeFlags (flag, path)
|
|
char *flag; /* flag which should precede each directory */
|
|
Lst path; /* list of directories */
|
|
{
|
|
char *str; /* the string which will be returned */
|
|
char *tstr; /* the current directory preceded by 'flag' */
|
|
LstNode ln; /* the node of the current directory */
|
|
Path *p; /* the structure describing the current directory */
|
|
|
|
str = strdup ("");
|
|
|
|
if (Lst_Open (path) == SUCCESS) {
|
|
while ((ln = Lst_Next (path)) != NILLNODE) {
|
|
p = (Path *) Lst_Datum (ln);
|
|
tstr = str_concat (flag, p->name, 0);
|
|
str = str_concat (str, tstr, STR_ADDSPACE | STR_DOFREE);
|
|
}
|
|
Lst_Close (path);
|
|
}
|
|
|
|
return (str);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_Destroy --
|
|
* Nuke a directory descriptor, if possible. Callback procedure
|
|
* for the suffixes module when destroying a search path.
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* If no other path references this directory (refCount == 0),
|
|
* the Path and all its data are freed.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Dir_Destroy (pp)
|
|
ClientData pp; /* The directory descriptor to nuke */
|
|
{
|
|
Path *p = (Path *) pp;
|
|
p->refCount -= 1;
|
|
|
|
if (p->refCount == 0) {
|
|
LstNode ln;
|
|
|
|
ln = Lst_Member (openDirectories, (ClientData)p);
|
|
(void) Lst_Remove (openDirectories, ln);
|
|
|
|
Hash_DeleteTable (&p->files);
|
|
free((Address)p->name);
|
|
free((Address)p);
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_ClearPath --
|
|
* Clear out all elements of the given search path. This is different
|
|
* from destroying the list, notice.
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* The path is set to the empty list.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Dir_ClearPath(path)
|
|
Lst path; /* Path to clear */
|
|
{
|
|
Path *p;
|
|
while (!Lst_IsEmpty(path)) {
|
|
p = (Path *)Lst_DeQueue(path);
|
|
Dir_Destroy((ClientData) p);
|
|
}
|
|
}
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Dir_Concat --
|
|
* Concatenate two paths, adding the second to the end of the first.
|
|
* Makes sure to avoid duplicates.
|
|
*
|
|
* Results:
|
|
* None
|
|
*
|
|
* Side Effects:
|
|
* Reference counts for added dirs are upped.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Dir_Concat(path1, path2)
|
|
Lst path1; /* Dest */
|
|
Lst path2; /* Source */
|
|
{
|
|
LstNode ln;
|
|
Path *p;
|
|
|
|
for (ln = Lst_First(path2); ln != NILLNODE; ln = Lst_Succ(ln)) {
|
|
p = (Path *)Lst_Datum(ln);
|
|
if (Lst_Member(path1, (ClientData)p) == NILLNODE) {
|
|
p->refCount += 1;
|
|
(void)Lst_AtEnd(path1, (ClientData)p);
|
|
}
|
|
}
|
|
}
|
|
|
|
/********** DEBUG INFO **********/
|
|
void
|
|
Dir_PrintDirectories()
|
|
{
|
|
LstNode ln;
|
|
Path *p;
|
|
|
|
printf ("#*** Directory Cache:\n");
|
|
printf ("# Stats: %d hits %d misses %d near misses %d losers (%d%%)\n",
|
|
hits, misses, nearmisses, bigmisses,
|
|
(hits+bigmisses+nearmisses ?
|
|
hits * 100 / (hits + bigmisses + nearmisses) : 0));
|
|
printf ("# %-20s referenced\thits\n", "directory");
|
|
if (Lst_Open (openDirectories) == SUCCESS) {
|
|
while ((ln = Lst_Next (openDirectories)) != NILLNODE) {
|
|
p = (Path *) Lst_Datum (ln);
|
|
printf ("# %-20s %10d\t%4d\n", p->name, p->refCount, p->hits);
|
|
}
|
|
Lst_Close (openDirectories);
|
|
}
|
|
}
|
|
|
|
static int DirPrintDir (p, dummy)
|
|
ClientData p;
|
|
ClientData dummy;
|
|
{
|
|
printf ("%s ", ((Path *) p)->name);
|
|
return (dummy ? 0 : 0);
|
|
}
|
|
|
|
void
|
|
Dir_PrintPath (path)
|
|
Lst path;
|
|
{
|
|
Lst_ForEach (path, DirPrintDir, (ClientData)0);
|
|
}
|