1742 lines
45 KiB
C
1742 lines
45 KiB
C
/* $NetBSD: dir.c,v 1.282 2023/06/23 04:56:54 rillig Exp $ */
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/*
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* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
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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. 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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/*
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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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/*
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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_InitCur Set the cur CachedDir.
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*
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* Dir_InitDot Set the dot CachedDir.
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*
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* Dir_End Clean up the module.
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*
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* Dir_SetPATH Set ${.PATH} to reflect state of dirSearchPath.
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*
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* Dir_HasWildcards
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* Returns true if the name given it needs to
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* be wildcard-expanded.
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*
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* SearchPath_Expand
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* Expand a filename pattern to find all matching files
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* from 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_FindHereOrAbove
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* Search for a path in the current directory and
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* then all the directories above it in turn until
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* the path is found or we reach the root ("/").
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*
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* Dir_UpdateMTime
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* Update the modification time and path of a node with
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* data from the file corresponding to the node.
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*
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* SearchPath_Add Add a directory to a search path.
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*
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* SearchPath_ToFlags
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* 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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*
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* SearchPath_Clear
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* Resets a search path to the empty list.
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*
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* For debugging:
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* Dir_PrintDirectories
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* Print stats about the directory cache.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <errno.h>
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#include "make.h"
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#include "dir.h"
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#include "job.h"
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/* "@(#)dir.c 8.2 (Berkeley) 1/2/94" */
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MAKE_RCSID("$NetBSD: dir.c,v 1.282 2023/06/23 04:56:54 rillig Exp $");
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/*
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* A search path is a list of CachedDir structures. A CachedDir has in it the
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* name of the directory and the names of all the files in the directory.
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* This is used to cut down on the number of system calls necessary to find
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* implicit dependents and their like. Since these searches are made before
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* any actions are taken, we need not worry about the directory changing due
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* to creation commands. If this hampers the style of some makefiles, they
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* must be changed.
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*
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* All previously-read directories are kept in openDirs, which is checked
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* first before a directory is opened.
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*
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* The need for the caching of whole directories is brought about by the
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* multi-level transformation code in suff.c, which tends to search for far
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* more files than regular make does. In the initial implementation, the
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* amount of time spent performing "stat" calls was truly astronomical.
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* The problem with caching at the start is, of course, that pmake doesn't
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* then detect changes to these directories during the course of the make.
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* 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 above,
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* this is very inefficient due to the number of checks engendered by
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* the multi-level transformation code.
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*
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* 2) use readdir() and company to search the directories, keeping them
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* open between checks. I have tried this and while it didn't slow down
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* the process too much, it could severely affect the amount of
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* parallelism available as each directory open would take another file
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* descriptor out of play for handling I/O for another job. Given that
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* it is only recently (as of 1993 or earlier) that UNIX OS's have taken
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* to allowing more than 20 or 32 file descriptors for a process, this
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* doesn't seem acceptable to me.
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*
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* 3) record the mtime of the directory in the CachedDir structure and
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* verify the directory hasn't changed since the contents were cached.
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* This will catch the creation or deletion of files, but not the
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* updating of files. However, since it is the creation and deletion
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* that is the problem, this could be a good thing to do. Unfortunately,
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* if the directory (say ".") were fairly large and changed fairly
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* frequently, the constant reloading could seriously degrade
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* performance. It might be good in such cases to keep track of the
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* number of reloadings and if the number goes over a (small) limit,
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* resort to using stat in its place.
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*
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* An additional thing to consider is that pmake is used primarily to create
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* C programs and until recently (as of 1993 or earlier) pcc-based compilers
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* refused 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 directory.
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* This isn't meant as a full excuse, just an explanation of some of the
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* 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 on the
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* downward traversal of the graph and then only for terminal nodes in the
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* graph. This could be construed as wrong in some cases, but prevents
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* inadvertent modification of files when the "installed" directory for a
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* 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 cache used
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* when the searching of cached directories fails to find a file. In the past,
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* Dir_FindFile would simply perform an access() call in such a case to
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* determine if the file could be found using just the name given. When this
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* hit, however, all that was gained was the knowledge that the file existed.
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* Given that an access() is essentially a stat() without the copyout() call,
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* and that the same filesystem overhead would have to be incurred in
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* Dir_MTime, it made sense to replace the access() with a stat() and record
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* the mtime in a cache for when Dir_UpdateMTime was actually called.
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*/
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/* A cache for the filenames in a directory. */
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struct CachedDir {
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/*
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* Name of directory, either absolute or relative to the current
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* directory. The name is not normalized in any way, that is, "."
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* and "./." are different.
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*
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* Not sure what happens when .CURDIR is assigned a new value; see
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* Parse_Var.
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*/
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char *name;
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/*
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* The number of SearchPaths that refer to this directory.
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* Plus the number of global variables that refer to this directory.
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* References from openDirs do not count though.
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*/
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int refCount;
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/* The number of times a file in this directory has been found. */
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int hits;
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/* The names of the directory entries. */
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HashSet files;
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};
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typedef List CachedDirList;
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typedef ListNode CachedDirListNode;
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typedef ListNode SearchPathNode;
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/* A list of cached directories, with fast lookup by directory name. */
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typedef struct OpenDirs {
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CachedDirList list;
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HashTable /* of CachedDirListNode */ table;
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} OpenDirs;
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SearchPath dirSearchPath = { LST_INIT }; /* main search path */
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static OpenDirs openDirs; /* all cached directories */
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/*
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* Variables for gathering statistics on the efficiency of the caching
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* mechanism.
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*/
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static int hits; /* Found in directory cache */
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static int misses; /* Sad, but not evil misses */
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static int nearmisses; /* Found under search path */
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static int bigmisses; /* Sought by itself */
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/* The cached contents of ".", the relative current directory. */
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static CachedDir *dot = NULL;
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/* The cached contents of the absolute current directory. */
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static CachedDir *cur = NULL;
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/* A fake path entry indicating we need to look for '.' last. */
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static CachedDir *dotLast = NULL;
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/*
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* Results of doing a last-resort stat in Dir_FindFile -- if we have to go to
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* the system to find the file, we might as well have its mtime on record.
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*
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* XXX: If this is done way early, there's a chance other rules will have
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* already updated the file, in which case we'll update it again. Generally,
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* there won't be two rules to update a single file, so this should be ok,
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* but...
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*/
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static HashTable mtimes;
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static HashTable lmtimes; /* same as mtimes but for lstat */
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static void OpenDirs_Remove(OpenDirs *, const char *);
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static CachedDir *
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CachedDir_New(const char *name)
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{
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CachedDir *dir = bmake_malloc(sizeof *dir);
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dir->name = bmake_strdup(name);
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dir->refCount = 0;
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dir->hits = 0;
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HashSet_Init(&dir->files);
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#ifdef DEBUG_REFCNT
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DEBUG2(DIR, "CachedDir %p new for \"%s\"\n", dir, dir->name);
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#endif
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return dir;
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}
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static CachedDir *
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CachedDir_Ref(CachedDir *dir)
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{
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dir->refCount++;
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#ifdef DEBUG_REFCNT
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DEBUG3(DIR, "CachedDir %p ++ %d for \"%s\"\n",
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dir, dir->refCount, dir->name);
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#endif
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return dir;
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}
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static void
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CachedDir_Unref(CachedDir *dir)
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{
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dir->refCount--;
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#ifdef DEBUG_REFCNT
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DEBUG3(DIR, "CachedDir %p -- %d for \"%s\"\n",
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dir, dir->refCount, dir->name);
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#endif
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if (dir->refCount > 0)
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return;
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#ifdef DEBUG_REFCNT
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DEBUG2(DIR, "CachedDir %p free for \"%s\"\n", dir, dir->name);
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#endif
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OpenDirs_Remove(&openDirs, dir->name);
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free(dir->name);
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HashSet_Done(&dir->files);
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free(dir);
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}
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/* Update the value of the CachedDir variable, updating the reference counts. */
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static void
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CachedDir_Assign(CachedDir **var, CachedDir *dir)
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{
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CachedDir *prev;
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prev = *var;
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*var = dir;
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if (dir != NULL)
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CachedDir_Ref(dir);
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if (prev != NULL)
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CachedDir_Unref(prev);
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}
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static void
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OpenDirs_Init(OpenDirs *odirs)
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{
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Lst_Init(&odirs->list);
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HashTable_Init(&odirs->table);
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}
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#ifdef CLEANUP
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static void
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OpenDirs_Done(OpenDirs *odirs)
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{
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CachedDirListNode *ln = odirs->list.first;
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DEBUG1(DIR, "OpenDirs_Done: %u entries to remove\n",
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odirs->table.numEntries);
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while (ln != NULL) {
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CachedDirListNode *next = ln->next;
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CachedDir *dir = ln->datum;
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DEBUG2(DIR, "OpenDirs_Done: refCount %d for \"%s\"\n",
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dir->refCount, dir->name);
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CachedDir_Unref(dir); /* removes the dir from odirs->list */
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ln = next;
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}
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Lst_Done(&odirs->list);
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HashTable_Done(&odirs->table);
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}
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#endif
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static CachedDir *
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OpenDirs_Find(OpenDirs *odirs, const char *name)
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{
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CachedDirListNode *ln = HashTable_FindValue(&odirs->table, name);
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return ln != NULL ? ln->datum : NULL;
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}
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static void
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OpenDirs_Add(OpenDirs *odirs, CachedDir *cdir)
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{
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if (HashTable_FindEntry(&odirs->table, cdir->name) != NULL)
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return;
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Lst_Append(&odirs->list, cdir);
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HashTable_Set(&odirs->table, cdir->name, odirs->list.last);
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}
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static void
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OpenDirs_Remove(OpenDirs *odirs, const char *name)
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{
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HashEntry *he = HashTable_FindEntry(&odirs->table, name);
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CachedDirListNode *ln;
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if (he == NULL)
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return;
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ln = HashEntry_Get(he);
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HashTable_DeleteEntry(&odirs->table, he);
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Lst_Remove(&odirs->list, ln);
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}
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/*
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* Returns 0 and the result of stat(2) or lstat(2) in *out_cst,
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* or -1 on error.
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*/
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static int
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cached_stats(const char *pathname, struct cached_stat *out_cst,
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bool useLstat, bool forceRefresh)
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{
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HashTable *tbl = useLstat ? &lmtimes : &mtimes;
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struct stat sys_st;
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struct cached_stat *cst;
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int rc;
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if (pathname == NULL || pathname[0] == '\0')
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return -1; /* This can happen in meta mode. */
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cst = HashTable_FindValue(tbl, pathname);
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if (cst != NULL && !forceRefresh) {
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*out_cst = *cst;
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DEBUG2(DIR, "Using cached time %s for %s\n",
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Targ_FmtTime(cst->cst_mtime), pathname);
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return 0;
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}
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rc = (useLstat ? lstat : stat)(pathname, &sys_st);
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if (rc == -1)
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return -1; /* don't cache negative lookups */
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if (sys_st.st_mtime == 0)
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sys_st.st_mtime = 1; /* avoid confusion with missing file */
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if (cst == NULL) {
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cst = bmake_malloc(sizeof *cst);
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HashTable_Set(tbl, pathname, cst);
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}
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cst->cst_mtime = sys_st.st_mtime;
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cst->cst_mode = sys_st.st_mode;
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*out_cst = *cst;
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DEBUG2(DIR, " Caching %s for %s\n",
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Targ_FmtTime(sys_st.st_mtime), pathname);
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return 0;
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}
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int
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cached_stat(const char *pathname, struct cached_stat *cst)
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{
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return cached_stats(pathname, cst, false, false);
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}
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int
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cached_lstat(const char *pathname, struct cached_stat *cst)
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{
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return cached_stats(pathname, cst, true, false);
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}
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/* Initialize the directories module. */
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void
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Dir_Init(void)
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{
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OpenDirs_Init(&openDirs);
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HashTable_Init(&mtimes);
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HashTable_Init(&lmtimes);
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CachedDir_Assign(&dotLast, CachedDir_New(".DOTLAST"));
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}
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/*
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* Called by Dir_InitDir and whenever .CURDIR is assigned to.
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*/
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void
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Dir_InitCur(const char *newCurdir)
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{
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CachedDir *dir;
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if (newCurdir == NULL)
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return;
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/*
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* Our build directory is not the same as our source directory.
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* Keep this one around too.
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*/
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dir = SearchPath_Add(NULL, newCurdir);
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if (dir == NULL)
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return;
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CachedDir_Assign(&cur, dir);
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}
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/*
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* (Re)initialize "dot" (current/object directory) path hash.
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* Some directories may be cached.
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*/
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void
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Dir_InitDot(void)
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{
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CachedDir *dir;
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dir = SearchPath_Add(NULL, ".");
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if (dir == NULL) {
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Error("Cannot open `.' (%s)", strerror(errno));
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exit(2); /* Not 1 so -q can distinguish error */
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}
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|
|
CachedDir_Assign(&dot, dir);
|
|
|
|
Dir_SetPATH(); /* initialize */
|
|
}
|
|
|
|
/* Clean up the directories module. */
|
|
void
|
|
Dir_End(void)
|
|
{
|
|
#ifdef CLEANUP
|
|
CachedDir_Assign(&cur, NULL);
|
|
CachedDir_Assign(&dot, NULL);
|
|
CachedDir_Assign(&dotLast, NULL);
|
|
SearchPath_Clear(&dirSearchPath);
|
|
OpenDirs_Done(&openDirs);
|
|
HashTable_Done(&mtimes);
|
|
HashTable_Done(&lmtimes);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* We want ${.PATH} to indicate the order in which we will actually
|
|
* search, so we rebuild it after any .PATH: target.
|
|
* This is the simplest way to deal with the effect of .DOTLAST.
|
|
*/
|
|
void
|
|
Dir_SetPATH(void)
|
|
{
|
|
CachedDirListNode *ln;
|
|
bool seenDotLast = false; /* true if we should search '.' last */
|
|
|
|
Global_Delete(".PATH");
|
|
|
|
if ((ln = dirSearchPath.dirs.first) != NULL) {
|
|
CachedDir *dir = ln->datum;
|
|
if (dir == dotLast) {
|
|
seenDotLast = true;
|
|
Global_Append(".PATH", dotLast->name);
|
|
}
|
|
}
|
|
|
|
if (!seenDotLast) {
|
|
if (dot != NULL)
|
|
Global_Append(".PATH", dot->name);
|
|
if (cur != NULL)
|
|
Global_Append(".PATH", cur->name);
|
|
}
|
|
|
|
for (ln = dirSearchPath.dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
if (dir == dotLast)
|
|
continue;
|
|
if (dir == dot && seenDotLast)
|
|
continue;
|
|
Global_Append(".PATH", dir->name);
|
|
}
|
|
|
|
if (seenDotLast) {
|
|
if (dot != NULL)
|
|
Global_Append(".PATH", dot->name);
|
|
if (cur != NULL)
|
|
Global_Append(".PATH", cur->name);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
Dir_SetSYSPATH(void)
|
|
{
|
|
CachedDirListNode *ln;
|
|
|
|
Var_ReadOnly(".SYSPATH", false);
|
|
Global_Delete(".SYSPATH");
|
|
for (ln = sysIncPath->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
Global_Append(".SYSPATH", dir->name);
|
|
}
|
|
Var_ReadOnly(".SYSPATH", true);
|
|
}
|
|
|
|
/*
|
|
* See if the given name has any wildcard characters in it and all braces and
|
|
* brackets are properly balanced.
|
|
*
|
|
* XXX: This code is not 100% correct ([^]] fails etc.). I really don't think
|
|
* that make(1) should be expanding patterns, because then you have to set a
|
|
* mechanism for escaping the expansion!
|
|
*
|
|
* Return true if the word should be expanded, false otherwise.
|
|
*/
|
|
bool
|
|
Dir_HasWildcards(const char *name)
|
|
{
|
|
const char *p;
|
|
bool wild = false;
|
|
int braces = 0, brackets = 0;
|
|
|
|
for (p = name; *p != '\0'; p++) {
|
|
switch (*p) {
|
|
case '{':
|
|
braces++;
|
|
wild = true;
|
|
break;
|
|
case '}':
|
|
braces--;
|
|
break;
|
|
case '[':
|
|
brackets++;
|
|
wild = true;
|
|
break;
|
|
case ']':
|
|
brackets--;
|
|
break;
|
|
case '?':
|
|
case '*':
|
|
wild = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return wild && brackets == 0 && braces == 0;
|
|
}
|
|
|
|
/*
|
|
* See if any files match the pattern and add their names to the 'expansions'
|
|
* list if they do.
|
|
*
|
|
* This is incomplete -- wildcards are only expanded in the final path
|
|
* component, but not in directories like src/lib*c/file*.c, but it
|
|
* will do for now (now being 1993 until at least 2020). To expand these,
|
|
* delegate the work to the shell, using the '!=' variable assignment
|
|
* operator, the ':sh' variable modifier or the ':!...!' variable modifier,
|
|
* such as in ${:!echo src/lib*c/file*.c!}.
|
|
*
|
|
* Input:
|
|
* pattern Pattern to look for
|
|
* dir Directory to search
|
|
* expansion Place to store the results
|
|
*/
|
|
static void
|
|
DirMatchFiles(const char *pattern, CachedDir *dir, StringList *expansions)
|
|
{
|
|
const char *dirName = dir->name;
|
|
bool isDot = dirName[0] == '.' && dirName[1] == '\0';
|
|
HashIter hi;
|
|
|
|
/*
|
|
* XXX: Iterating over all hash entries is inefficient. If the
|
|
* pattern is a plain string without any wildcards, a direct lookup
|
|
* is faster.
|
|
*/
|
|
|
|
HashIter_InitSet(&hi, &dir->files);
|
|
while (HashIter_Next(&hi) != NULL) {
|
|
const char *base = hi.entry->key;
|
|
StrMatchResult res = Str_Match(base, pattern);
|
|
/* TODO: handle errors from res.error */
|
|
|
|
if (!res.matched)
|
|
continue;
|
|
|
|
/*
|
|
* Follow the UNIX convention that dot files are only found
|
|
* if the pattern begins with a dot. The pattern '.*' does
|
|
* not match '.' or '..' since these are not included in the
|
|
* directory cache.
|
|
*
|
|
* This means that the pattern '[a-z.]*' does not find
|
|
* '.file', which is consistent with NetBSD sh, NetBSD ksh,
|
|
* bash, dash, csh and probably many other shells as well.
|
|
*/
|
|
if (base[0] == '.' && pattern[0] != '.')
|
|
continue;
|
|
|
|
{
|
|
char *fullName = isDot
|
|
? bmake_strdup(base)
|
|
: str_concat3(dirName, "/", base);
|
|
Lst_Append(expansions, fullName);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Find the next closing brace in the string, taking nested braces into
|
|
* account.
|
|
*/
|
|
static const char *
|
|
closing_brace(const char *p)
|
|
{
|
|
int nest = 0;
|
|
while (*p != '\0') {
|
|
if (*p == '}' && nest == 0)
|
|
break;
|
|
if (*p == '{')
|
|
nest++;
|
|
if (*p == '}')
|
|
nest--;
|
|
p++;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* Find the next closing brace or comma in the string, taking nested braces
|
|
* into account.
|
|
*/
|
|
static const char *
|
|
separator_comma(const char *p)
|
|
{
|
|
int nest = 0;
|
|
while (*p != '\0') {
|
|
if ((*p == '}' || *p == ',') && nest == 0)
|
|
break;
|
|
if (*p == '{')
|
|
nest++;
|
|
if (*p == '}')
|
|
nest--;
|
|
p++;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static bool
|
|
contains_wildcard(const char *p)
|
|
{
|
|
for (; *p != '\0'; p++) {
|
|
switch (*p) {
|
|
case '*':
|
|
case '?':
|
|
case '{':
|
|
case '[':
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static char *
|
|
concat3(const char *a, size_t a_len, const char *b, size_t b_len,
|
|
const char *c, size_t c_len)
|
|
{
|
|
size_t s_len = a_len + b_len + c_len;
|
|
char *s = bmake_malloc(s_len + 1);
|
|
memcpy(s, a, a_len);
|
|
memcpy(s + a_len, b, b_len);
|
|
memcpy(s + a_len + b_len, c, c_len);
|
|
s[s_len] = '\0';
|
|
return s;
|
|
}
|
|
|
|
/*
|
|
* Expand curly braces like the C shell. Brace expansion by itself is purely
|
|
* textual, the expansions are not looked up in the file system. But if an
|
|
* expanded word contains wildcard characters, it is expanded further,
|
|
* matching only the actually existing files.
|
|
*
|
|
* Example: "{a{b,c}}" expands to "ab" and "ac".
|
|
* Example: "{a}" expands to "a".
|
|
* Example: "{a,*.c}" expands to "a" and all "*.c" files that exist.
|
|
*
|
|
* Input:
|
|
* word Entire word to expand
|
|
* brace First curly brace in it
|
|
* path Search path to use
|
|
* expansions Place to store the expansions
|
|
*/
|
|
static void
|
|
DirExpandCurly(const char *word, const char *brace, SearchPath *path,
|
|
StringList *expansions)
|
|
{
|
|
const char *prefix, *middle, *piece, *middle_end, *suffix;
|
|
size_t prefix_len, suffix_len;
|
|
|
|
/* Split the word into prefix '{' middle '}' suffix. */
|
|
|
|
middle = brace + 1;
|
|
middle_end = closing_brace(middle);
|
|
if (*middle_end == '\0') {
|
|
Error("Unterminated {} clause \"%s\"", middle);
|
|
return;
|
|
}
|
|
|
|
prefix = word;
|
|
prefix_len = (size_t)(brace - prefix);
|
|
suffix = middle_end + 1;
|
|
suffix_len = strlen(suffix);
|
|
|
|
/* Split the middle into pieces, separated by commas. */
|
|
|
|
piece = middle;
|
|
while (piece < middle_end + 1) {
|
|
const char *piece_end = separator_comma(piece);
|
|
size_t piece_len = (size_t)(piece_end - piece);
|
|
|
|
char *file = concat3(prefix, prefix_len, piece, piece_len,
|
|
suffix, suffix_len);
|
|
|
|
if (contains_wildcard(file)) {
|
|
SearchPath_Expand(path, file, expansions);
|
|
free(file);
|
|
} else {
|
|
Lst_Append(expansions, file);
|
|
}
|
|
|
|
/* skip over the comma or closing brace */
|
|
piece = piece_end + 1;
|
|
}
|
|
}
|
|
|
|
|
|
/* Expand the pattern in each of the directories from the path. */
|
|
static void
|
|
DirExpandPath(const char *pattern, SearchPath *path, StringList *expansions)
|
|
{
|
|
SearchPathNode *ln;
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
DirMatchFiles(pattern, dir, expansions);
|
|
}
|
|
}
|
|
|
|
static void
|
|
PrintExpansions(StringList *expansions)
|
|
{
|
|
const char *sep = "";
|
|
StringListNode *ln;
|
|
for (ln = expansions->first; ln != NULL; ln = ln->next) {
|
|
const char *word = ln->datum;
|
|
debug_printf("%s%s", sep, word);
|
|
sep = " ";
|
|
}
|
|
debug_printf("\n");
|
|
}
|
|
|
|
/*
|
|
* The wildcard isn't in the first component.
|
|
* Find all the components up to the one with the wildcard.
|
|
*/
|
|
static void
|
|
SearchPath_ExpandMiddle(SearchPath *path, const char *pattern,
|
|
const char *wildcardComponent, StringList *expansions)
|
|
{
|
|
char *prefix, *dirpath, *end;
|
|
SearchPath *partPath;
|
|
|
|
prefix = bmake_strsedup(pattern, wildcardComponent + 1);
|
|
/*
|
|
* XXX: Check the "the directory is added to the path" part.
|
|
* It is probably surprising that the directory before a
|
|
* wildcard gets added to the path.
|
|
*/
|
|
/*
|
|
* XXX: Only the first match of the prefix in the path is
|
|
* taken, any others are ignored. The expectation may be
|
|
* that the pattern is expanded in the whole path.
|
|
*/
|
|
dirpath = Dir_FindFile(prefix, path);
|
|
free(prefix);
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* XXX: Check whether the above comment is still true.
|
|
*/
|
|
if (dirpath == NULL)
|
|
return;
|
|
|
|
end = &dirpath[strlen(dirpath) - 1];
|
|
/* XXX: What about multiple trailing slashes? */
|
|
if (*end == '/')
|
|
*end = '\0';
|
|
|
|
partPath = SearchPath_New();
|
|
(void)SearchPath_Add(partPath, dirpath);
|
|
DirExpandPath(wildcardComponent + 1, partPath, expansions);
|
|
SearchPath_Free(partPath);
|
|
}
|
|
|
|
/*
|
|
* Expand the given pattern into a list of existing filenames by globbing it,
|
|
* looking in each directory from the search path.
|
|
*
|
|
* Input:
|
|
* path the directories in which to find the files
|
|
* pattern the pattern to expand
|
|
* expansions the list on which to place the results
|
|
*/
|
|
void
|
|
SearchPath_Expand(SearchPath *path, const char *pattern, StringList *expansions)
|
|
{
|
|
const char *brace, *slash, *wildcard, *wildcardComponent;
|
|
|
|
assert(path != NULL);
|
|
assert(expansions != NULL);
|
|
|
|
DEBUG1(DIR, "Expanding \"%s\"... ", pattern);
|
|
|
|
brace = strchr(pattern, '{');
|
|
if (brace != NULL) {
|
|
DirExpandCurly(pattern, brace, path, expansions);
|
|
goto done;
|
|
}
|
|
|
|
/* At this point, the pattern does not contain '{'. */
|
|
|
|
slash = strchr(pattern, '/');
|
|
if (slash == NULL) {
|
|
/* The pattern has no directory component. */
|
|
|
|
/* First the files in dot. */
|
|
DirMatchFiles(pattern, dot, expansions);
|
|
/* Then the files in every other directory on the path. */
|
|
DirExpandPath(pattern, path, expansions);
|
|
goto done;
|
|
}
|
|
|
|
/* At this point, the pattern has a directory component. */
|
|
|
|
/* Find the first wildcard in the pattern. */
|
|
for (wildcard = pattern; *wildcard != '\0'; wildcard++)
|
|
if (*wildcard == '?' || *wildcard == '[' || *wildcard == '*')
|
|
break;
|
|
|
|
if (*wildcard == '\0') {
|
|
/*
|
|
* No directory component and no wildcard at all -- this
|
|
* should never happen as in such a simple case there is no
|
|
* need to expand anything.
|
|
*/
|
|
DirExpandPath(pattern, path, expansions);
|
|
goto done;
|
|
}
|
|
|
|
/* Back up to the start of the component containing the wildcard. */
|
|
/* XXX: This handles '///' and '/' differently. */
|
|
wildcardComponent = wildcard;
|
|
while (wildcardComponent > pattern && *wildcardComponent != '/')
|
|
wildcardComponent--;
|
|
|
|
if (wildcardComponent == pattern) {
|
|
/* The first component contains the wildcard. */
|
|
/* Start the search from the local directory */
|
|
DirExpandPath(pattern, path, expansions);
|
|
} else {
|
|
SearchPath_ExpandMiddle(path, pattern, wildcardComponent,
|
|
expansions);
|
|
}
|
|
|
|
done:
|
|
if (DEBUG(DIR))
|
|
PrintExpansions(expansions);
|
|
}
|
|
|
|
/*
|
|
* Find if the file with the given name exists in the given path.
|
|
* Return the freshly allocated path to the file, or NULL.
|
|
*/
|
|
static char *
|
|
DirLookup(CachedDir *dir, const char *base)
|
|
{
|
|
char *file; /* the current filename to check */
|
|
|
|
DEBUG1(DIR, " %s ...\n", dir->name);
|
|
|
|
if (!HashSet_Contains(&dir->files, base))
|
|
return NULL;
|
|
|
|
file = str_concat3(dir->name, "/", base);
|
|
DEBUG1(DIR, " returning %s\n", file);
|
|
dir->hits++;
|
|
hits++;
|
|
return file;
|
|
}
|
|
|
|
|
|
/*
|
|
* Find if the file with the given name exists in the given directory.
|
|
* Return the freshly allocated path to the file, or NULL.
|
|
*/
|
|
static char *
|
|
DirLookupSubdir(CachedDir *dir, const char *name)
|
|
{
|
|
struct cached_stat cst;
|
|
char *file = dir == dot
|
|
? bmake_strdup(name)
|
|
: str_concat3(dir->name, "/", name);
|
|
|
|
DEBUG1(DIR, "checking %s ...\n", file);
|
|
|
|
if (cached_stat(file, &cst) == 0) {
|
|
nearmisses++;
|
|
return file;
|
|
}
|
|
free(file);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Find if the file with the given name exists in the given path.
|
|
* Return the freshly allocated path to the file, the empty string, or NULL.
|
|
* Returning the empty string means that the search should be terminated.
|
|
*/
|
|
static char *
|
|
DirLookupAbs(CachedDir *dir, const char *name, const char *cp)
|
|
{
|
|
const char *dnp; /* pointer into dir->name */
|
|
const char *np; /* pointer into name */
|
|
|
|
DEBUG1(DIR, " %s ...\n", dir->name);
|
|
|
|
/*
|
|
* If the file has a leading path component and that component
|
|
* exactly matches the entire name of the current search
|
|
* directory, we can attempt another cache lookup. And if we don't
|
|
* have a hit, we can safely assume the file does not exist at all.
|
|
*/
|
|
for (dnp = dir->name, np = name;
|
|
*dnp != '\0' && *dnp == *np; dnp++, np++)
|
|
continue;
|
|
if (*dnp != '\0' || np != cp - 1)
|
|
return NULL;
|
|
|
|
if (!HashSet_Contains(&dir->files, cp)) {
|
|
DEBUG0(DIR, " must be here but isn't -- returning\n");
|
|
return bmake_strdup(""); /* to terminate the search */
|
|
}
|
|
|
|
dir->hits++;
|
|
hits++;
|
|
DEBUG1(DIR, " returning %s\n", name);
|
|
return bmake_strdup(name);
|
|
}
|
|
|
|
/*
|
|
* Find the given file in "." or curdir.
|
|
* Return the freshly allocated path to the file, or NULL.
|
|
*/
|
|
static char *
|
|
DirFindDot(const char *name, const char *base)
|
|
{
|
|
|
|
if (HashSet_Contains(&dot->files, base)) {
|
|
DEBUG0(DIR, " in '.'\n");
|
|
hits++;
|
|
dot->hits++;
|
|
return bmake_strdup(name);
|
|
}
|
|
|
|
if (cur != NULL && HashSet_Contains(&cur->files, base)) {
|
|
DEBUG1(DIR, " in ${.CURDIR} = %s\n", cur->name);
|
|
hits++;
|
|
cur->hits++;
|
|
return str_concat3(cur->name, "/", base);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static bool
|
|
FindFileRelative(SearchPath *path, bool seenDotLast,
|
|
const char *name, char **out_file)
|
|
{
|
|
SearchPathNode *ln;
|
|
bool checkedDot = false;
|
|
char *file;
|
|
|
|
DEBUG0(DIR, " Trying subdirectories...\n");
|
|
|
|
if (!seenDotLast) {
|
|
if (dot != NULL) {
|
|
checkedDot = true;
|
|
if ((file = DirLookupSubdir(dot, name)) != NULL)
|
|
goto found;
|
|
}
|
|
if (cur != NULL &&
|
|
(file = DirLookupSubdir(cur, name)) != NULL)
|
|
goto found;
|
|
}
|
|
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
if (dir == dotLast)
|
|
continue;
|
|
if (dir == dot) {
|
|
if (checkedDot)
|
|
continue;
|
|
checkedDot = true;
|
|
}
|
|
if ((file = DirLookupSubdir(dir, name)) != NULL)
|
|
goto found;
|
|
}
|
|
|
|
if (seenDotLast) {
|
|
if (dot != NULL && !checkedDot) {
|
|
checkedDot = true;
|
|
if ((file = DirLookupSubdir(dot, name)) != NULL)
|
|
goto found;
|
|
}
|
|
if (cur != NULL &&
|
|
(file = DirLookupSubdir(cur, name)) != NULL)
|
|
goto found;
|
|
}
|
|
|
|
if (checkedDot) {
|
|
/*
|
|
* Already checked by the given name, since . was in
|
|
* the path, so no point in proceeding.
|
|
*/
|
|
DEBUG0(DIR, " Checked . already, returning NULL\n");
|
|
file = NULL;
|
|
goto found;
|
|
}
|
|
|
|
return false;
|
|
|
|
found:
|
|
*out_file = file;
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
FindFileAbsolute(SearchPath *path, bool seenDotLast,
|
|
const char *name, const char *base, char **out_file)
|
|
{
|
|
char *file;
|
|
SearchPathNode *ln;
|
|
|
|
/*
|
|
* For absolute names, compare directory path prefix against
|
|
* the the directory path of each member on the search path
|
|
* for an exact match. If we have an exact match on any member
|
|
* of the search path, use the cached contents of that member
|
|
* to lookup the final file component. If that lookup fails we
|
|
* can safely assume that the file does not exist at all.
|
|
* This is signified by DirLookupAbs() returning an empty
|
|
* string.
|
|
*/
|
|
DEBUG0(DIR, " Trying exact path matches...\n");
|
|
|
|
if (!seenDotLast && cur != NULL &&
|
|
((file = DirLookupAbs(cur, name, base)) != NULL))
|
|
goto found;
|
|
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
if (dir == dotLast)
|
|
continue;
|
|
if ((file = DirLookupAbs(dir, name, base)) != NULL)
|
|
goto found;
|
|
}
|
|
|
|
if (seenDotLast && cur != NULL &&
|
|
((file = DirLookupAbs(cur, name, base)) != NULL))
|
|
goto found;
|
|
|
|
return false;
|
|
|
|
found:
|
|
if (file[0] == '\0') {
|
|
free(file);
|
|
file = NULL;
|
|
}
|
|
*out_file = file;
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Find the file with the given name along the given search path.
|
|
*
|
|
* If the file is found in a directory that 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.
|
|
*
|
|
* Input:
|
|
* name the file to find
|
|
* path the directories to search, or NULL
|
|
*
|
|
* Results:
|
|
* The freshly allocated path to the file, or NULL.
|
|
*/
|
|
char *
|
|
Dir_FindFile(const char *name, SearchPath *path)
|
|
{
|
|
char *file; /* the current filename to check */
|
|
bool seenDotLast = false; /* true if we should search dot last */
|
|
struct cached_stat cst; /* Buffer for stat, if necessary */
|
|
const char *trailing_dot = ".";
|
|
const char *base = str_basename(name);
|
|
|
|
DEBUG1(DIR, "Searching for %s ...", name);
|
|
|
|
if (path == NULL) {
|
|
DEBUG0(DIR, "couldn't open path, file not found\n");
|
|
misses++;
|
|
return NULL;
|
|
}
|
|
|
|
if (path->dirs.first != NULL) {
|
|
CachedDir *dir = path->dirs.first->datum;
|
|
if (dir == dotLast) {
|
|
seenDotLast = true;
|
|
DEBUG0(DIR, "[dot last]...");
|
|
}
|
|
}
|
|
DEBUG0(DIR, "\n");
|
|
|
|
/*
|
|
* If there's no leading directory components or if the leading
|
|
* directory component is exactly `./', consult the cached contents
|
|
* of each of the directories on the search path.
|
|
*/
|
|
if (base == name || (base - name == 2 && *name == '.')) {
|
|
SearchPathNode *ln;
|
|
|
|
/*
|
|
* We look through all the directories on the path seeking one
|
|
* which contains the final component of the given name. If
|
|
* such a file 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.
|
|
*
|
|
* No matter what, we always look for the file in the current
|
|
* directory before anywhere else (unless we found the magic
|
|
* DOTLAST path, in which case we search it last) 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 (!seenDotLast && (file = DirFindDot(name, base)) != NULL)
|
|
return file;
|
|
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
if (dir == dotLast)
|
|
continue;
|
|
if ((file = DirLookup(dir, base)) != NULL)
|
|
return file;
|
|
}
|
|
|
|
if (seenDotLast && (file = DirFindDot(name, base)) != NULL)
|
|
return file;
|
|
}
|
|
|
|
/*
|
|
* We didn't find the file on any directory in the search path.
|
|
* 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).
|
|
* [ This no longer applies: If we find such a file, 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 (base == name) {
|
|
DEBUG0(DIR, " failed.\n");
|
|
misses++;
|
|
return NULL;
|
|
}
|
|
|
|
if (*base == '\0') {
|
|
/* we were given a trailing "/" */
|
|
base = trailing_dot;
|
|
}
|
|
|
|
if (name[0] != '/') {
|
|
if (FindFileRelative(path, seenDotLast, name, &file))
|
|
return file;
|
|
} else {
|
|
if (FindFileAbsolute(path, seenDotLast, name, base, &file))
|
|
return file;
|
|
}
|
|
|
|
/*
|
|
* 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...
|
|
*/
|
|
#if 0
|
|
{
|
|
CachedDir *dir;
|
|
char *prefix;
|
|
|
|
if (base == trailing_dot) {
|
|
base = strrchr(name, '/');
|
|
base++;
|
|
}
|
|
prefix = bmake_strsedup(name, base - 1);
|
|
(void)SearchPath_Add(path, prefix);
|
|
free(prefix);
|
|
|
|
bigmisses++;
|
|
if (path->last == NULL)
|
|
return NULL;
|
|
|
|
dir = path->last->datum;
|
|
if (HashSet_Contains(&dir->files, base))
|
|
return bmake_strdup(name);
|
|
return NULL;
|
|
}
|
|
#else
|
|
DEBUG1(DIR, " Looking for \"%s\" ...\n", name);
|
|
|
|
bigmisses++;
|
|
if (cached_stat(name, &cst) == 0) {
|
|
return bmake_strdup(name);
|
|
}
|
|
|
|
DEBUG0(DIR, " failed. Returning NULL\n");
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Search for a path starting at a given directory and then working our way
|
|
* up towards the root.
|
|
*
|
|
* Input:
|
|
* here starting directory
|
|
* search_path the relative path we are looking for
|
|
*
|
|
* Results:
|
|
* The found path, or NULL.
|
|
*/
|
|
char *
|
|
Dir_FindHereOrAbove(const char *here, const char *search_path)
|
|
{
|
|
struct cached_stat cst;
|
|
char *dirbase, *dirbase_end;
|
|
char *try, *try_end;
|
|
|
|
/* copy out our starting point */
|
|
dirbase = bmake_strdup(here);
|
|
dirbase_end = dirbase + strlen(dirbase);
|
|
|
|
/* loop until we determine a result */
|
|
for (;;) {
|
|
|
|
/* try and stat(2) it ... */
|
|
try = str_concat3(dirbase, "/", search_path);
|
|
if (cached_stat(try, &cst) != -1) {
|
|
/*
|
|
* success! if we found a file, chop off
|
|
* the filename so we return a directory.
|
|
*/
|
|
if ((cst.cst_mode & S_IFMT) != S_IFDIR) {
|
|
try_end = try + strlen(try);
|
|
while (try_end > try && *try_end != '/')
|
|
try_end--;
|
|
if (try_end > try)
|
|
*try_end = '\0'; /* chop! */
|
|
}
|
|
|
|
free(dirbase);
|
|
return try;
|
|
}
|
|
free(try);
|
|
|
|
/*
|
|
* nope, we didn't find it. if we used up dirbase we've
|
|
* reached the root and failed.
|
|
*/
|
|
if (dirbase_end == dirbase)
|
|
break; /* failed! */
|
|
|
|
/*
|
|
* truncate dirbase from the end to move up a dir
|
|
*/
|
|
while (dirbase_end > dirbase && *dirbase_end != '/')
|
|
dirbase_end--;
|
|
*dirbase_end = '\0'; /* chop! */
|
|
}
|
|
|
|
free(dirbase);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* This is an implied source, and it may have moved,
|
|
* see if we can find it via the current .PATH
|
|
*/
|
|
static char *
|
|
ResolveMovedDepends(GNode *gn)
|
|
{
|
|
char *fullName;
|
|
|
|
const char *base = str_basename(gn->name);
|
|
if (base == gn->name)
|
|
return NULL;
|
|
|
|
fullName = Dir_FindFile(base, Suff_FindPath(gn));
|
|
if (fullName == NULL)
|
|
return NULL;
|
|
|
|
/*
|
|
* Put the found file in gn->path so that we give that to the compiler.
|
|
*/
|
|
/*
|
|
* XXX: Better just reset gn->path to NULL; updating it is already done
|
|
* by Dir_UpdateMTime.
|
|
*/
|
|
gn->path = bmake_strdup(fullName);
|
|
if (!Job_RunTarget(".STALE", gn->fname))
|
|
fprintf(stdout, /* XXX: Why stdout? */
|
|
"%s: %s, %u: ignoring stale %s for %s, found %s\n",
|
|
progname, gn->fname, gn->lineno,
|
|
makeDependfile, gn->name, fullName);
|
|
|
|
return fullName;
|
|
}
|
|
|
|
static char *
|
|
ResolveFullName(GNode *gn)
|
|
{
|
|
char *fullName;
|
|
|
|
fullName = gn->path;
|
|
if (fullName == NULL && !(gn->type & OP_NOPATH)) {
|
|
|
|
fullName = Dir_FindFile(gn->name, Suff_FindPath(gn));
|
|
|
|
if (fullName == NULL && gn->flags.fromDepend &&
|
|
!Lst_IsEmpty(&gn->implicitParents))
|
|
fullName = ResolveMovedDepends(gn);
|
|
|
|
DEBUG2(DIR, "Found '%s' as '%s'\n",
|
|
gn->name, fullName != NULL ? fullName : "(not found)");
|
|
}
|
|
|
|
if (fullName == NULL)
|
|
fullName = bmake_strdup(gn->name);
|
|
|
|
/* XXX: Is every piece of memory freed as it should? */
|
|
|
|
return fullName;
|
|
}
|
|
|
|
/*
|
|
* Search gn along dirSearchPath and store its modification time in gn->mtime.
|
|
* If no file is found, store 0 instead.
|
|
*
|
|
* The found file is stored in gn->path, unless the node already had a path.
|
|
*/
|
|
void
|
|
Dir_UpdateMTime(GNode *gn, bool forceRefresh)
|
|
{
|
|
char *fullName;
|
|
struct cached_stat cst;
|
|
|
|
if (gn->type & OP_ARCHV) {
|
|
Arch_UpdateMTime(gn);
|
|
return;
|
|
}
|
|
|
|
if (gn->type & OP_PHONY) {
|
|
gn->mtime = 0;
|
|
return;
|
|
}
|
|
|
|
fullName = ResolveFullName(gn);
|
|
|
|
if (cached_stats(fullName, &cst, false, forceRefresh) < 0) {
|
|
if (gn->type & OP_MEMBER) {
|
|
if (fullName != gn->path)
|
|
free(fullName);
|
|
Arch_UpdateMemberMTime(gn);
|
|
return;
|
|
}
|
|
|
|
cst.cst_mtime = 0;
|
|
}
|
|
|
|
if (fullName != NULL && gn->path == NULL)
|
|
gn->path = fullName;
|
|
/* XXX: else free(fullName)? */
|
|
|
|
gn->mtime = cst.cst_mtime;
|
|
}
|
|
|
|
/*
|
|
* Read the directory and add it to the cache in openDirs.
|
|
* If a path is given, add the directory to that path as well.
|
|
*/
|
|
static CachedDir *
|
|
CacheNewDir(const char *name, SearchPath *path)
|
|
{
|
|
CachedDir *dir = NULL;
|
|
DIR *d;
|
|
struct dirent *dp;
|
|
|
|
if ((d = opendir(name)) == NULL) {
|
|
DEBUG1(DIR, "Caching %s ... not found\n", name);
|
|
return dir;
|
|
}
|
|
|
|
DEBUG1(DIR, "Caching %s ...\n", name);
|
|
|
|
dir = CachedDir_New(name);
|
|
|
|
while ((dp = readdir(d)) != NULL) {
|
|
|
|
#if defined(sun) && defined(d_ino) /* d_ino is a sunos4 #define for d_fileno */
|
|
/*
|
|
* 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 && d_ino */
|
|
|
|
(void)HashSet_Add(&dir->files, dp->d_name);
|
|
}
|
|
(void)closedir(d);
|
|
|
|
OpenDirs_Add(&openDirs, dir);
|
|
if (path != NULL)
|
|
Lst_Append(&path->dirs, CachedDir_Ref(dir));
|
|
|
|
DEBUG1(DIR, "Caching %s done\n", name);
|
|
return dir;
|
|
}
|
|
|
|
/*
|
|
* Read the list of filenames in the directory and store the result
|
|
* in openDirs.
|
|
*
|
|
* If a path is given, append the directory to that path.
|
|
*
|
|
* Input:
|
|
* path The path to which the directory should be
|
|
* added, or NULL to only add the directory to openDirs
|
|
* name The name of the directory to add.
|
|
* The name is not normalized in any way.
|
|
* Output:
|
|
* result If no path is given and the directory exists, the
|
|
* returned CachedDir has a reference count of 0. It
|
|
* must either be assigned to a variable using
|
|
* CachedDir_Assign or be appended to a SearchPath using
|
|
* Lst_Append and CachedDir_Ref.
|
|
*/
|
|
CachedDir *
|
|
SearchPath_Add(SearchPath *path, const char *name)
|
|
{
|
|
|
|
if (path != NULL && strcmp(name, ".DOTLAST") == 0) {
|
|
SearchPathNode *ln;
|
|
|
|
/* XXX: Linear search gets slow with thousands of entries. */
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *pathDir = ln->datum;
|
|
if (strcmp(pathDir->name, name) == 0)
|
|
return pathDir;
|
|
}
|
|
|
|
Lst_Prepend(&path->dirs, CachedDir_Ref(dotLast));
|
|
}
|
|
|
|
if (path != NULL) {
|
|
/* XXX: Why is OpenDirs only checked if path != NULL? */
|
|
CachedDir *dir = OpenDirs_Find(&openDirs, name);
|
|
if (dir != NULL) {
|
|
if (Lst_FindDatum(&path->dirs, dir) == NULL)
|
|
Lst_Append(&path->dirs, CachedDir_Ref(dir));
|
|
return dir;
|
|
}
|
|
}
|
|
|
|
return CacheNewDir(name, path);
|
|
}
|
|
|
|
/*
|
|
* Return a copy of dirSearchPath, incrementing the reference counts for
|
|
* the contained directories.
|
|
*/
|
|
SearchPath *
|
|
Dir_CopyDirSearchPath(void)
|
|
{
|
|
SearchPath *path = SearchPath_New();
|
|
SearchPathNode *ln;
|
|
for (ln = dirSearchPath.dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
Lst_Append(&path->dirs, CachedDir_Ref(dir));
|
|
}
|
|
return path;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* Input:
|
|
* flag flag which should precede each directory
|
|
* path list of directories
|
|
*
|
|
* 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.
|
|
*/
|
|
char *
|
|
SearchPath_ToFlags(SearchPath *path, const char *flag)
|
|
{
|
|
Buffer buf;
|
|
SearchPathNode *ln;
|
|
|
|
Buf_Init(&buf);
|
|
|
|
if (path != NULL) {
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
Buf_AddStr(&buf, " ");
|
|
Buf_AddStr(&buf, flag);
|
|
Buf_AddStr(&buf, dir->name);
|
|
}
|
|
}
|
|
|
|
return Buf_DoneData(&buf);
|
|
}
|
|
|
|
/* Free the search path and all directories mentioned in it. */
|
|
void
|
|
SearchPath_Free(SearchPath *path)
|
|
{
|
|
SearchPathNode *ln;
|
|
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
CachedDir_Unref(dir);
|
|
}
|
|
Lst_Done(&path->dirs);
|
|
free(path);
|
|
}
|
|
|
|
/*
|
|
* Clear out all elements from the given search path.
|
|
* The path is set to the empty list but is not destroyed.
|
|
*/
|
|
void
|
|
SearchPath_Clear(SearchPath *path)
|
|
{
|
|
while (!Lst_IsEmpty(&path->dirs)) {
|
|
CachedDir *dir = Lst_Dequeue(&path->dirs);
|
|
CachedDir_Unref(dir);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Concatenate two paths, adding the second to the end of the first,
|
|
* skipping duplicates.
|
|
*/
|
|
void
|
|
SearchPath_AddAll(SearchPath *dst, SearchPath *src)
|
|
{
|
|
SearchPathNode *ln;
|
|
|
|
for (ln = src->dirs.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
if (Lst_FindDatum(&dst->dirs, dir) == NULL)
|
|
Lst_Append(&dst->dirs, CachedDir_Ref(dir));
|
|
}
|
|
}
|
|
|
|
static int
|
|
percentage(int num, int den)
|
|
{
|
|
return den != 0 ? num * 100 / den : 0;
|
|
}
|
|
|
|
/********** DEBUG INFO **********/
|
|
void
|
|
Dir_PrintDirectories(void)
|
|
{
|
|
CachedDirListNode *ln;
|
|
|
|
debug_printf("#*** Directory Cache:\n");
|
|
debug_printf(
|
|
"# Stats: %d hits %d misses %d near misses %d losers (%d%%)\n",
|
|
hits, misses, nearmisses, bigmisses,
|
|
percentage(hits, hits + bigmisses + nearmisses));
|
|
debug_printf("# refs hits directory\n");
|
|
|
|
for (ln = openDirs.list.first; ln != NULL; ln = ln->next) {
|
|
CachedDir *dir = ln->datum;
|
|
debug_printf("# %4d %4d %s\n",
|
|
dir->refCount, dir->hits, dir->name);
|
|
}
|
|
}
|
|
|
|
void
|
|
SearchPath_Print(const SearchPath *path)
|
|
{
|
|
SearchPathNode *ln;
|
|
|
|
for (ln = path->dirs.first; ln != NULL; ln = ln->next) {
|
|
const CachedDir *dir = ln->datum;
|
|
debug_printf("%s ", dir->name);
|
|
}
|
|
}
|