1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
804 lines
19 KiB
C
804 lines
19 KiB
C
# if 0
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/* $NetBSD: rcorder.c,v 1.7 2000/08/04 07:33:55 enami Exp $ */
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#endif
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1998, 1999 Matthew R. Green
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* All rights reserved.
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* Copyright (c) 1998
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* Perry E. Metzger. All rights reserved.
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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 for the NetBSD Project
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* by Perry E. Metzger.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <err.h>
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#include <stdio.h>
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#include <libutil.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "ealloc.h"
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#include "sprite.h"
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#include "hash.h"
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#ifdef DEBUG
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static int debug = 0;
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# define DPRINTF(args) if (debug) { fflush(stdout); fprintf args; }
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#else
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# define DPRINTF(args)
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#endif
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#define REQUIRE_STR "# REQUIRE:"
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#define REQUIRE_LEN (sizeof(REQUIRE_STR) - 1)
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#define REQUIRES_STR "# REQUIRES:"
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#define REQUIRES_LEN (sizeof(REQUIRES_STR) - 1)
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#define PROVIDE_STR "# PROVIDE:"
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#define PROVIDE_LEN (sizeof(PROVIDE_STR) - 1)
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#define PROVIDES_STR "# PROVIDES:"
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#define PROVIDES_LEN (sizeof(PROVIDES_STR) - 1)
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#define BEFORE_STR "# BEFORE:"
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#define BEFORE_LEN (sizeof(BEFORE_STR) - 1)
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#define KEYWORD_STR "# KEYWORD:"
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#define KEYWORD_LEN (sizeof(KEYWORD_STR) - 1)
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#define KEYWORDS_STR "# KEYWORDS:"
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#define KEYWORDS_LEN (sizeof(KEYWORDS_STR) - 1)
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static int exit_code;
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static int file_count;
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static char **file_list;
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typedef int bool;
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#define TRUE 1
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#define FALSE 0
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typedef bool flag;
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#define SET TRUE
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#define RESET FALSE
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static Hash_Table provide_hash_s, *provide_hash;
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typedef struct provnode provnode;
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typedef struct filenode filenode;
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typedef struct f_provnode f_provnode;
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typedef struct f_reqnode f_reqnode;
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typedef struct strnodelist strnodelist;
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struct provnode {
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flag head;
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flag in_progress;
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filenode *fnode;
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provnode *next, *last;
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};
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struct f_provnode {
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provnode *pnode;
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f_provnode *next;
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};
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struct f_reqnode {
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Hash_Entry *entry;
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f_reqnode *next;
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};
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struct strnodelist {
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filenode *node;
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strnodelist *next;
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char s[1];
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};
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struct filenode {
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char *filename;
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flag in_progress;
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filenode *next, *last;
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f_reqnode *req_list;
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f_provnode *prov_list;
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strnodelist *keyword_list;
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};
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static filenode fn_head_s, *fn_head;
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static strnodelist *bl_list;
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static strnodelist *keep_list;
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static strnodelist *skip_list;
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static void do_file(filenode *fnode);
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static void strnode_add(strnodelist **, char *, filenode *);
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static int skip_ok(filenode *fnode);
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static int keep_ok(filenode *fnode);
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static void satisfy_req(f_reqnode *rnode, char *filename);
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static void crunch_file(char *);
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static void parse_require(filenode *, char *);
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static void parse_provide(filenode *, char *);
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static void parse_before(filenode *, char *);
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static void parse_keywords(filenode *, char *);
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static filenode *filenode_new(char *);
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static void add_require(filenode *, char *);
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static void add_provide(filenode *, char *);
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static void add_before(filenode *, char *);
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static void add_keyword(filenode *, char *);
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static void insert_before(void);
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static Hash_Entry *make_fake_provision(filenode *);
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static void crunch_all_files(void);
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static void initialize(void);
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static void generate_ordering(void);
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int
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main(int argc, char *argv[])
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{
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int ch;
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while ((ch = getopt(argc, argv, "dk:s:")) != -1)
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switch (ch) {
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case 'd':
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#ifdef DEBUG
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debug = 1;
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#else
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warnx("debugging not compiled in, -d ignored");
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#endif
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break;
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case 'k':
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strnode_add(&keep_list, optarg, 0);
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break;
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case 's':
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strnode_add(&skip_list, optarg, 0);
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break;
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default:
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/* XXX should crunch it? */
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break;
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}
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argc -= optind;
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argv += optind;
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file_count = argc;
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file_list = argv;
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DPRINTF((stderr, "parse_args\n"));
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initialize();
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DPRINTF((stderr, "initialize\n"));
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crunch_all_files();
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DPRINTF((stderr, "crunch_all_files\n"));
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generate_ordering();
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DPRINTF((stderr, "generate_ordering\n"));
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exit(exit_code);
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}
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/*
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* initialise various variables.
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*/
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static void
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initialize(void)
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{
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fn_head = &fn_head_s;
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provide_hash = &provide_hash_s;
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Hash_InitTable(provide_hash, file_count);
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}
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/* generic function to insert a new strnodelist element */
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static void
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strnode_add(strnodelist **listp, char *s, filenode *fnode)
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{
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strnodelist *ent;
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ent = emalloc(sizeof *ent + strlen(s));
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ent->node = fnode;
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strcpy(ent->s, s);
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ent->next = *listp;
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*listp = ent;
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}
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/*
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* below are the functions that deal with creating the lists
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* from the filename's given dependencies and provisions
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* in each of these files. no ordering or checking is done here.
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*/
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/*
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* we have a new filename, create a new filenode structure.
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* fill in the bits, and put it in the filenode linked list
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*/
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static filenode *
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filenode_new(char *filename)
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{
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filenode *temp;
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temp = emalloc(sizeof(*temp));
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memset(temp, 0, sizeof(*temp));
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temp->filename = estrdup(filename);
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temp->req_list = NULL;
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temp->prov_list = NULL;
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temp->keyword_list = NULL;
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temp->in_progress = RESET;
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/*
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* link the filenode into the list of filenodes.
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* note that the double linking means we can delete a
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* filenode without searching for where it belongs.
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*/
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temp->next = fn_head->next;
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if (temp->next != NULL)
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temp->next->last = temp;
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temp->last = fn_head;
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fn_head->next = temp;
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return (temp);
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}
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/*
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* add a requirement to a filenode.
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*/
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static void
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add_require(filenode *fnode, char *s)
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{
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Hash_Entry *entry;
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f_reqnode *rnode;
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int new;
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entry = Hash_CreateEntry(provide_hash, s, &new);
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if (new)
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Hash_SetValue(entry, NULL);
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rnode = emalloc(sizeof(*rnode));
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rnode->entry = entry;
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rnode->next = fnode->req_list;
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fnode->req_list = rnode;
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}
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/*
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* add a provision to a filenode. if this provision doesn't
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* have a head node, create one here.
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*/
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static void
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add_provide(filenode *fnode, char *s)
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{
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Hash_Entry *entry;
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f_provnode *f_pnode;
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provnode *pnode, *head;
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int new;
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entry = Hash_CreateEntry(provide_hash, s, &new);
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head = Hash_GetValue(entry);
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/* create a head node if necessary. */
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if (head == NULL) {
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head = emalloc(sizeof(*head));
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head->head = SET;
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head->in_progress = RESET;
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head->fnode = NULL;
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head->last = head->next = NULL;
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Hash_SetValue(entry, head);
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}
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#if 0
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/*
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* Don't warn about this. We want to be able to support
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* scripts that do two complex things:
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*
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* - Two independent scripts which both provide the
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* same thing. Both scripts must be executed in
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* any order to meet the barrier. An example:
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*
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* Script 1:
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*
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* PROVIDE: mail
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* REQUIRE: LOGIN
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*
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* Script 2:
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*
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* PROVIDE: mail
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* REQUIRE: LOGIN
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*
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* - Two interdependent scripts which both provide the
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* same thing. Both scripts must be executed in
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* graph order to meet the barrier. An example:
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*
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* Script 1:
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*
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* PROVIDE: nameservice dnscache
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* REQUIRE: SERVERS
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*
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* Script 2:
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*
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* PROVIDE: nameservice nscd
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* REQUIRE: dnscache
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*/
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else if (new == 0) {
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warnx("file `%s' provides `%s'.", fnode->filename, s);
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warnx("\tpreviously seen in `%s'.",
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head->next->fnode->filename);
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}
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#endif
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pnode = emalloc(sizeof(*pnode));
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pnode->head = RESET;
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pnode->in_progress = RESET;
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pnode->fnode = fnode;
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pnode->next = head->next;
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pnode->last = head;
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head->next = pnode;
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if (pnode->next != NULL)
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pnode->next->last = pnode;
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f_pnode = emalloc(sizeof(*f_pnode));
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f_pnode->pnode = pnode;
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f_pnode->next = fnode->prov_list;
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fnode->prov_list = f_pnode;
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}
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/*
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* put the BEFORE: lines to a list and handle them later.
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*/
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static void
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add_before(filenode *fnode, char *s)
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{
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strnodelist *bf_ent;
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bf_ent = emalloc(sizeof *bf_ent + strlen(s));
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bf_ent->node = fnode;
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strcpy(bf_ent->s, s);
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bf_ent->next = bl_list;
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bl_list = bf_ent;
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}
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/*
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* add a key to a filenode.
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*/
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static void
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add_keyword(filenode *fnode, char *s)
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{
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strnode_add(&fnode->keyword_list, s, fnode);
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}
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/*
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* loop over the rest of a REQUIRE line, giving each word to
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* add_require() to do the real work.
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*/
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static void
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parse_require(filenode *node, char *buffer)
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{
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char *s;
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while ((s = strsep(&buffer, " \t\n")) != NULL)
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if (*s != '\0')
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add_require(node, s);
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}
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/*
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* loop over the rest of a PROVIDE line, giving each word to
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* add_provide() to do the real work.
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*/
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static void
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parse_provide(filenode *node, char *buffer)
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{
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char *s;
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while ((s = strsep(&buffer, " \t\n")) != NULL)
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if (*s != '\0')
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add_provide(node, s);
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}
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/*
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* loop over the rest of a BEFORE line, giving each word to
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* add_before() to do the real work.
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*/
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static void
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parse_before(filenode *node, char *buffer)
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{
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char *s;
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while ((s = strsep(&buffer, " \t\n")) != NULL)
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if (*s != '\0')
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add_before(node, s);
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}
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/*
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* loop over the rest of a KEYWORD line, giving each word to
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* add_keyword() to do the real work.
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*/
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static void
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parse_keywords(filenode *node, char *buffer)
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{
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char *s;
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while ((s = strsep(&buffer, " \t\n")) != NULL)
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if (*s != '\0')
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add_keyword(node, s);
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}
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/*
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* given a file name, create a filenode for it, read in lines looking
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* for provision and requirement lines, building the graphs as needed.
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*/
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static void
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crunch_file(char *filename)
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{
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FILE *fp;
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char *buf;
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int require_flag, provide_flag, before_flag, keywords_flag;
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enum { BEFORE_PARSING, PARSING, PARSING_DONE } state;
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filenode *node;
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char delims[3] = { '\\', '\\', '\0' };
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struct stat st;
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if ((fp = fopen(filename, "r")) == NULL) {
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warn("could not open %s", filename);
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return;
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}
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if (fstat(fileno(fp), &st) == -1) {
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warn("could not stat %s", filename);
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fclose(fp);
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return;
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}
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if (!S_ISREG(st.st_mode)) {
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#if 0
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warnx("%s is not a file", filename);
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#endif
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fclose(fp);
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return;
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}
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node = filenode_new(filename);
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/*
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* we don't care about length, line number, don't want # for comments,
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* and have no flags.
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*/
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for (state = BEFORE_PARSING; state != PARSING_DONE &&
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(buf = fparseln(fp, NULL, NULL, delims, 0)) != NULL; free(buf)) {
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require_flag = provide_flag = before_flag = keywords_flag = 0;
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if (strncmp(REQUIRE_STR, buf, REQUIRE_LEN) == 0)
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require_flag = REQUIRE_LEN;
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else if (strncmp(REQUIRES_STR, buf, REQUIRES_LEN) == 0)
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require_flag = REQUIRES_LEN;
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else if (strncmp(PROVIDE_STR, buf, PROVIDE_LEN) == 0)
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provide_flag = PROVIDE_LEN;
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else if (strncmp(PROVIDES_STR, buf, PROVIDES_LEN) == 0)
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provide_flag = PROVIDES_LEN;
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else if (strncmp(BEFORE_STR, buf, BEFORE_LEN) == 0)
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before_flag = BEFORE_LEN;
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else if (strncmp(KEYWORD_STR, buf, KEYWORD_LEN) == 0)
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keywords_flag = KEYWORD_LEN;
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else if (strncmp(KEYWORDS_STR, buf, KEYWORDS_LEN) == 0)
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keywords_flag = KEYWORDS_LEN;
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else {
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if (state == PARSING)
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state = PARSING_DONE;
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continue;
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}
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state = PARSING;
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if (require_flag)
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parse_require(node, buf + require_flag);
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else if (provide_flag)
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parse_provide(node, buf + provide_flag);
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else if (before_flag)
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parse_before(node, buf + before_flag);
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else if (keywords_flag)
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parse_keywords(node, buf + keywords_flag);
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}
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fclose(fp);
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}
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static Hash_Entry *
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make_fake_provision(filenode *node)
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{
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Hash_Entry *entry;
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f_provnode *f_pnode;
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provnode *head, *pnode;
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static int i = 0;
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int new;
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char buffer[30];
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do {
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snprintf(buffer, sizeof buffer, "fake_prov_%08d", i++);
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entry = Hash_CreateEntry(provide_hash, buffer, &new);
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} while (new == 0);
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head = emalloc(sizeof(*head));
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head->head = SET;
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head->in_progress = RESET;
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head->fnode = NULL;
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head->last = head->next = NULL;
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Hash_SetValue(entry, head);
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pnode = emalloc(sizeof(*pnode));
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pnode->head = RESET;
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pnode->in_progress = RESET;
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pnode->fnode = node;
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pnode->next = head->next;
|
|
pnode->last = head;
|
|
head->next = pnode;
|
|
if (pnode->next != NULL)
|
|
pnode->next->last = pnode;
|
|
|
|
f_pnode = emalloc(sizeof(*f_pnode));
|
|
f_pnode->pnode = pnode;
|
|
f_pnode->next = node->prov_list;
|
|
node->prov_list = f_pnode;
|
|
|
|
return (entry);
|
|
}
|
|
|
|
/*
|
|
* go through the BEFORE list, inserting requirements into the graph(s)
|
|
* as required. in the before list, for each entry B, we have a file F
|
|
* and a string S. we create a "fake" provision (P) that F provides.
|
|
* for each entry in the provision list for S, add a requirement to
|
|
* that provisions filenode for P.
|
|
*/
|
|
static void
|
|
insert_before(void)
|
|
{
|
|
Hash_Entry *entry, *fake_prov_entry;
|
|
provnode *pnode;
|
|
f_reqnode *rnode;
|
|
strnodelist *bl;
|
|
int new;
|
|
|
|
while (bl_list != NULL) {
|
|
bl = bl_list->next;
|
|
|
|
fake_prov_entry = make_fake_provision(bl_list->node);
|
|
|
|
entry = Hash_CreateEntry(provide_hash, bl_list->s, &new);
|
|
if (new == 1)
|
|
warnx("file `%s' is before unknown provision `%s'", bl_list->node->filename, bl_list->s);
|
|
|
|
for (pnode = Hash_GetValue(entry); pnode; pnode = pnode->next) {
|
|
if (pnode->head)
|
|
continue;
|
|
|
|
rnode = emalloc(sizeof(*rnode));
|
|
rnode->entry = fake_prov_entry;
|
|
rnode->next = pnode->fnode->req_list;
|
|
pnode->fnode->req_list = rnode;
|
|
}
|
|
|
|
free(bl_list);
|
|
bl_list = bl;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* loop over all the files calling crunch_file() on them to do the
|
|
* real work. after we have built all the nodes, insert the BEFORE:
|
|
* lines into graph(s).
|
|
*/
|
|
static void
|
|
crunch_all_files(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < file_count; i++)
|
|
crunch_file(file_list[i]);
|
|
insert_before();
|
|
}
|
|
|
|
/*
|
|
* below are the functions that traverse the graphs we have built
|
|
* finding out the desired ordering, printing each file in turn.
|
|
* if missing requirements, or cyclic graphs are detected, a
|
|
* warning will be issued, and we will continue on..
|
|
*/
|
|
|
|
/*
|
|
* given a requirement node (in a filename) we attempt to satisfy it.
|
|
* we do some sanity checking first, to ensure that we have providers,
|
|
* aren't already satisfied and aren't already being satisfied (ie,
|
|
* cyclic). if we pass all this, we loop over the provision list
|
|
* calling do_file() (enter recursion) for each filenode in this
|
|
* provision.
|
|
*/
|
|
static void
|
|
satisfy_req(f_reqnode *rnode, char *filename)
|
|
{
|
|
Hash_Entry *entry;
|
|
provnode *head;
|
|
|
|
entry = rnode->entry;
|
|
head = Hash_GetValue(entry);
|
|
|
|
if (head == NULL) {
|
|
warnx("requirement `%s' in file `%s' has no providers.",
|
|
Hash_GetKey(entry), filename);
|
|
exit_code = 1;
|
|
return;
|
|
}
|
|
|
|
/* return if the requirement is already satisfied. */
|
|
if (head->next == NULL)
|
|
return;
|
|
|
|
/*
|
|
* if list is marked as in progress,
|
|
* print that there is a circular dependency on it and abort
|
|
*/
|
|
if (head->in_progress == SET) {
|
|
warnx("Circular dependency on provision `%s' in file `%s'.",
|
|
Hash_GetKey(entry), filename);
|
|
exit_code = 1;
|
|
return;
|
|
}
|
|
|
|
head->in_progress = SET;
|
|
|
|
/*
|
|
* while provision_list is not empty
|
|
* do_file(first_member_of(provision_list));
|
|
*/
|
|
while (head->next != NULL)
|
|
do_file(head->next->fnode);
|
|
}
|
|
|
|
static int
|
|
skip_ok(filenode *fnode)
|
|
{
|
|
strnodelist *s;
|
|
strnodelist *k;
|
|
|
|
for (s = skip_list; s; s = s->next)
|
|
for (k = fnode->keyword_list; k; k = k->next)
|
|
if (strcmp(k->s, s->s) == 0)
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
keep_ok(filenode *fnode)
|
|
{
|
|
strnodelist *s;
|
|
strnodelist *k;
|
|
|
|
for (s = keep_list; s; s = s->next)
|
|
for (k = fnode->keyword_list; k; k = k->next)
|
|
if (strcmp(k->s, s->s) == 0)
|
|
return (1);
|
|
|
|
/* an empty keep_list means every one */
|
|
return (!keep_list);
|
|
}
|
|
|
|
/*
|
|
* given a filenode, we ensure we are not a cyclic graph. if this
|
|
* is ok, we loop over the filenodes requirements, calling satisfy_req()
|
|
* for each of them.. once we have done this, remove this filenode
|
|
* from each provision table, as we are now done.
|
|
*
|
|
* NOTE: do_file() is called recursively from several places and cannot
|
|
* safely free() anything related to items that may be recursed on.
|
|
* Circular dependencies will cause problems if we do.
|
|
*/
|
|
static void
|
|
do_file(filenode *fnode)
|
|
{
|
|
f_reqnode *r;
|
|
f_provnode *p, *p_tmp;
|
|
provnode *pnode;
|
|
int was_set;
|
|
|
|
DPRINTF((stderr, "do_file on %s.\n", fnode->filename));
|
|
|
|
/*
|
|
* if fnode is marked as in progress,
|
|
* print that fnode; is circularly depended upon and abort.
|
|
*/
|
|
if (fnode->in_progress == SET) {
|
|
warnx("Circular dependency on file `%s'.",
|
|
fnode->filename);
|
|
was_set = exit_code = 1;
|
|
} else
|
|
was_set = 0;
|
|
|
|
/* mark fnode */
|
|
fnode->in_progress = SET;
|
|
|
|
/*
|
|
* for each requirement of fnode -> r
|
|
* satisfy_req(r, filename)
|
|
*/
|
|
r = fnode->req_list;
|
|
while (r != NULL) {
|
|
satisfy_req(r, fnode->filename);
|
|
r = r->next;
|
|
}
|
|
fnode->req_list = NULL;
|
|
|
|
/*
|
|
* for each provision of fnode -> p
|
|
* remove fnode from provision list for p in hash table
|
|
*/
|
|
p = fnode->prov_list;
|
|
while (p != NULL) {
|
|
p_tmp = p;
|
|
pnode = p->pnode;
|
|
if (pnode->next != NULL) {
|
|
pnode->next->last = pnode->last;
|
|
}
|
|
if (pnode->last != NULL) {
|
|
pnode->last->next = pnode->next;
|
|
}
|
|
free(pnode);
|
|
p = p->next;
|
|
free(p_tmp);
|
|
}
|
|
fnode->prov_list = NULL;
|
|
|
|
/* do_it(fnode) */
|
|
DPRINTF((stderr, "next do: "));
|
|
|
|
/* if we were already in progress, don't print again */
|
|
if (was_set == 0 && skip_ok(fnode) && keep_ok(fnode))
|
|
printf("%s\n", fnode->filename);
|
|
|
|
if (fnode->next != NULL) {
|
|
fnode->next->last = fnode->last;
|
|
}
|
|
if (fnode->last != NULL) {
|
|
fnode->last->next = fnode->next;
|
|
}
|
|
|
|
DPRINTF((stderr, "nuking %s\n", fnode->filename));
|
|
#if 0
|
|
if (was_set == 0) {
|
|
free(fnode->filename);
|
|
free(fnode);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
generate_ordering(void)
|
|
{
|
|
|
|
/*
|
|
* while there remain undone files{f},
|
|
* pick an arbitrary f, and do_file(f)
|
|
* Note that the first file in the file list is perfectly
|
|
* arbitrary, and easy to find, so we use that.
|
|
*/
|
|
|
|
/*
|
|
* N.B.: the file nodes "self delete" after they execute, so
|
|
* after each iteration of the loop, the head will be pointing
|
|
* to something totally different. The loop ends up being
|
|
* executed only once for every strongly connected set of
|
|
* nodes.
|
|
*/
|
|
while (fn_head->next != NULL) {
|
|
DPRINTF((stderr, "generate on %s\n", fn_head->next->filename));
|
|
do_file(fn_head->next);
|
|
}
|
|
}
|