802 lines
19 KiB
C
802 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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* 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;
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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 = node->prov_list;
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|
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);
|
|
}
|
|
}
|