675 lines
18 KiB
C
675 lines
18 KiB
C
/* $NetBSD: compat.c,v 1.23 1997/12/31 06:06:12 thorpej 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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* 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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#ifdef MAKE_BOOTSTRAP
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static char rcsid[] = "$NetBSD: compat.c,v 1.23 1997/12/31 06:06:12 thorpej Exp $";
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#else
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)compat.c 8.2 (Berkeley) 3/19/94";
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#else
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__RCSID("$NetBSD: compat.c,v 1.23 1997/12/31 06:06:12 thorpej Exp $");
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#endif
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#endif /* not lint */
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#endif
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/*-
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* compat.c --
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* The routines in this file implement the full-compatibility
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* mode of PMake. Most of the special functionality of PMake
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* is available in this mode. Things not supported:
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* - different shells.
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* - friendly variable substitution.
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*
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* Interface:
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* Compat_Run Initialize things for this module and recreate
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* thems as need creatin'
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <errno.h>
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#include <signal.h>
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#include "make.h"
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#include "hash.h"
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#include "dir.h"
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#include "job.h"
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extern int errno;
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/*
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* The following array is used to make a fast determination of which
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* characters are interpreted specially by the shell. If a command
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* contains any of these characters, it is executed by the shell, not
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* directly by us.
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*/
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static char meta[256];
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static GNode *curTarg = NILGNODE;
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static GNode *ENDNode;
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static void CompatInterrupt __P((int));
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static int CompatRunCommand __P((ClientData, ClientData));
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static int CompatMake __P((ClientData, ClientData));
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/*-
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*-----------------------------------------------------------------------
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* CompatInterrupt --
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* Interrupt the creation of the current target and remove it if
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* it ain't precious.
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*
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* Results:
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* None.
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*
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* Side Effects:
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* The target is removed and the process exits. If .INTERRUPT exists,
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* its commands are run first WITH INTERRUPTS IGNORED..
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*
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*-----------------------------------------------------------------------
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*/
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static void
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CompatInterrupt (signo)
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int signo;
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{
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GNode *gn;
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if ((curTarg != NILGNODE) && !Targ_Precious (curTarg)) {
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char *p1;
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char *file = Var_Value (TARGET, curTarg, &p1);
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if (!noExecute && eunlink(file) != -1) {
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Error("*** %s removed\n", file);
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}
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if (p1)
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free(p1);
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/*
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* Run .INTERRUPT only if hit with interrupt signal
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*/
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if (signo == SIGINT) {
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gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
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if (gn != NILGNODE) {
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Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
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}
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}
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}
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exit (signo);
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}
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/*-
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*-----------------------------------------------------------------------
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* CompatRunCommand --
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* Execute the next command for a target. If the command returns an
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* error, the node's made field is set to ERROR and creation stops.
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*
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* Results:
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* 0 if the command succeeded, 1 if an error occurred.
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*
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* Side Effects:
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* The node's 'made' field may be set to ERROR.
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*
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*-----------------------------------------------------------------------
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*/
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static int
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CompatRunCommand (cmdp, gnp)
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ClientData cmdp; /* Command to execute */
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ClientData gnp; /* Node from which the command came */
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{
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char *cmdStart; /* Start of expanded command */
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register char *cp;
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Boolean silent, /* Don't print command */
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errCheck; /* Check errors */
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int reason; /* Reason for child's death */
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int status; /* Description of child's death */
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int cpid; /* Child actually found */
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ReturnStatus stat; /* Status of fork */
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LstNode cmdNode; /* Node where current command is located */
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char **av; /* Argument vector for thing to exec */
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int argc; /* Number of arguments in av or 0 if not
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* dynamically allocated */
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Boolean local; /* TRUE if command should be executed
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* locally */
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char *cmd = (char *) cmdp;
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GNode *gn = (GNode *) gnp;
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/*
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* Avoid clobbered variable warnings by forcing the compiler
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* to ``unregister'' variables
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*/
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#if __GNUC__
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(void) &av;
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(void) &errCheck;
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#endif
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silent = gn->type & OP_SILENT;
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errCheck = !(gn->type & OP_IGNORE);
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cmdNode = Lst_Member (gn->commands, (ClientData)cmd);
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cmdStart = Var_Subst (NULL, cmd, gn, FALSE);
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/*
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* brk_string will return an argv with a NULL in av[1], thus causing
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* execvp to choke and die horribly. Besides, how can we execute a null
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* command? In any case, we warn the user that the command expanded to
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* nothing (is this the right thing to do?).
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*/
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if (*cmdStart == '\0') {
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free(cmdStart);
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Error("%s expands to empty string", cmd);
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return(0);
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} else {
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cmd = cmdStart;
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}
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Lst_Replace (cmdNode, (ClientData)cmdStart);
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if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
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(void)Lst_AtEnd(ENDNode->commands, (ClientData)cmdStart);
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return(0);
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} else if (strcmp(cmdStart, "...") == 0) {
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gn->type |= OP_SAVE_CMDS;
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return(0);
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}
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while ((*cmd == '@') || (*cmd == '-')) {
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if (*cmd == '@') {
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silent = TRUE;
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} else {
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errCheck = FALSE;
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}
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cmd++;
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}
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while (isspace((unsigned char)*cmd))
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cmd++;
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/*
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* Search for meta characters in the command. If there are no meta
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* characters, there's no need to execute a shell to execute the
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* command.
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*/
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for (cp = cmd; !meta[(unsigned char)*cp]; cp++) {
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continue;
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}
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/*
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* Print the command before echoing if we're not supposed to be quiet for
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* this one. We also print the command if -n given.
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*/
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if (!silent || (noExecute && !(gn->type & OP_MAKE))) {
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printf ("%s\n", cmd);
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fflush(stdout);
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}
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/*
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* If we're not supposed to execute any commands, this is as far as
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* we go...
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*/
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if (noExecute && !(gn->type & OP_MAKE)) {
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return (0);
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}
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if (*cp != '\0') {
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/*
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* If *cp isn't the null character, we hit a "meta" character and
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* need to pass the command off to the shell. We give the shell the
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* -e flag as well as -c if it's supposed to exit when it hits an
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* error.
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*/
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static char *shargv[4] = { "/bin/sh" };
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shargv[1] = (errCheck ? "-ec" : "-c");
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shargv[2] = cmd;
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shargv[3] = (char *)NULL;
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av = shargv;
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argc = 0;
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} else {
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/*
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* No meta-characters, so no need to exec a shell. Break the command
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* into words to form an argument vector we can execute.
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* brk_string sticks our name in av[0], so we have to
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* skip over it...
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*/
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av = brk_string(cmd, &argc, TRUE);
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av += 1;
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}
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local = TRUE;
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/*
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* Fork and execute the single command. If the fork fails, we abort.
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*/
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cpid = vfork();
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if (cpid < 0) {
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Fatal("Could not fork");
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}
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if (cpid == 0) {
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if (local) {
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execvp(av[0], av);
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(void) write (2, av[0], strlen (av[0]));
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(void) write (2, ": not found\n", sizeof(": not found"));
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} else {
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(void)execv(av[0], av);
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}
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_exit(1);
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}
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free(cmdStart);
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Lst_Replace (cmdNode, (ClientData) NULL);
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/*
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* The child is off and running. Now all we can do is wait...
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*/
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while (1) {
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while ((stat = wait(&reason)) != cpid) {
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if (stat == -1 && errno != EINTR) {
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break;
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}
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}
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if (stat > -1) {
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if (WIFSTOPPED(reason)) {
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status = WSTOPSIG(reason); /* stopped */
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} else if (WIFEXITED(reason)) {
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status = WEXITSTATUS(reason); /* exited */
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if (status != 0) {
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printf ("*** Error code %d", status);
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}
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} else {
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status = WTERMSIG(reason); /* signaled */
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printf ("*** Signal %d", status);
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}
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if (!WIFEXITED(reason) || (status != 0)) {
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if (errCheck) {
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gn->made = ERROR;
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if (keepgoing) {
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/*
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* Abort the current target, but let others
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* continue.
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*/
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printf (" (continuing)\n");
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}
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} else {
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/*
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* Continue executing commands for this target.
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* If we return 0, this will happen...
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*/
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printf (" (ignored)\n");
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status = 0;
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}
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}
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break;
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} else {
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Fatal ("error in wait: %d", stat);
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/*NOTREACHED*/
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}
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}
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return (status);
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}
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/*-
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*-----------------------------------------------------------------------
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* CompatMake --
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* Make a target.
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*
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* Results:
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* 0
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*
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* Side Effects:
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* If an error is detected and not being ignored, the process exits.
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*
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*-----------------------------------------------------------------------
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*/
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static int
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CompatMake (gnp, pgnp)
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ClientData gnp; /* The node to make */
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ClientData pgnp; /* Parent to abort if necessary */
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{
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GNode *gn = (GNode *) gnp;
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GNode *pgn = (GNode *) pgnp;
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if (pgn->type & OP_MADE) {
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(void) Dir_MTime(gn);
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gn->made = UPTODATE;
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}
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if (gn->made == UNMADE) {
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/*
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* First mark ourselves to be made, then apply whatever transformations
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* the suffix module thinks are necessary. Once that's done, we can
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* descend and make all our children. If any of them has an error
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* but the -k flag was given, our 'make' field will be set FALSE again.
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* This is our signal to not attempt to do anything but abort our
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* parent as well.
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*/
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gn->make = TRUE;
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gn->made = BEINGMADE;
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Suff_FindDeps (gn);
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Lst_ForEach (gn->children, CompatMake, (ClientData)gn);
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if (!gn->make) {
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gn->made = ABORTED;
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pgn->make = FALSE;
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return (0);
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}
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if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
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char *p1;
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Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
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if (p1)
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free(p1);
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}
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/*
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* All the children were made ok. Now cmtime contains the modification
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* time of the newest child, we need to find out if we exist and when
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* we were modified last. The criteria for datedness are defined by the
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* Make_OODate function.
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*/
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if (DEBUG(MAKE)) {
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printf("Examining %s...", gn->name);
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}
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if (! Make_OODate(gn)) {
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gn->made = UPTODATE;
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if (DEBUG(MAKE)) {
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printf("up-to-date.\n");
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}
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return (0);
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} else if (DEBUG(MAKE)) {
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printf("out-of-date.\n");
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}
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/*
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* If the user is just seeing if something is out-of-date, exit now
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* to tell him/her "yes".
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*/
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if (queryFlag) {
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exit (-1);
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}
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/*
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* We need to be re-made. We also have to make sure we've got a $?
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* variable. To be nice, we also define the $> variable using
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* Make_DoAllVar().
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*/
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Make_DoAllVar(gn);
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/*
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* Alter our type to tell if errors should be ignored or things
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* should not be printed so CompatRunCommand knows what to do.
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*/
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if (Targ_Ignore (gn)) {
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gn->type |= OP_IGNORE;
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}
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if (Targ_Silent (gn)) {
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gn->type |= OP_SILENT;
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}
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if (Job_CheckCommands (gn, Fatal)) {
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/*
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* Our commands are ok, but we still have to worry about the -t
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* flag...
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*/
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if (!touchFlag || (gn->type & OP_MAKE)) {
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curTarg = gn;
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Lst_ForEach (gn->commands, CompatRunCommand, (ClientData)gn);
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curTarg = NILGNODE;
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} else {
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Job_Touch (gn, gn->type & OP_SILENT);
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}
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} else {
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gn->made = ERROR;
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}
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if (gn->made != ERROR) {
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/*
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* If the node was made successfully, mark it so, update
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* its modification time and timestamp all its parents. Note
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* that for .ZEROTIME targets, the timestamping isn't done.
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* This is to keep its state from affecting that of its parent.
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*/
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gn->made = MADE;
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#ifndef RECHECK
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/*
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* We can't re-stat the thing, but we can at least take care of
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* rules where a target depends on a source that actually creates
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* the target, but only if it has changed, e.g.
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*
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* parse.h : parse.o
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*
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* parse.o : parse.y
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* yacc -d parse.y
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* cc -c y.tab.c
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* mv y.tab.o parse.o
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* cmp -s y.tab.h parse.h || mv y.tab.h parse.h
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*
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* In this case, if the definitions produced by yacc haven't
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* changed from before, parse.h won't have been updated and
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* gn->mtime will reflect the current modification time for
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* parse.h. This is something of a kludge, I admit, but it's a
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* useful one..
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*
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* XXX: People like to use a rule like
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*
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* FRC:
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*
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* To force things that depend on FRC to be made, so we have to
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* check for gn->children being empty as well...
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*/
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if (!Lst_IsEmpty(gn->commands) || Lst_IsEmpty(gn->children)) {
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gn->mtime = now;
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}
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#else
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/*
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* This is what Make does and it's actually a good thing, as it
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* allows rules like
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*
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* cmp -s y.tab.h parse.h || cp y.tab.h parse.h
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*
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* to function as intended. Unfortunately, thanks to the stateless
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* nature of NFS (and the speed of this program), there are times
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* when the modification time of a file created on a remote
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* machine will not be modified before the stat() implied by
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* the Dir_MTime occurs, thus leading us to believe that the file
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* is unchanged, wreaking havoc with files that depend on this one.
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*
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* I have decided it is better to make too much than to make too
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* little, so this stuff is commented out unless you're sure it's
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* ok.
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* -- ardeb 1/12/88
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*/
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if ((noExecute && !(gn->type & OP_MAKE)) ||
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(gn->type & OP_SAVE_CMDS) || Dir_MTime(gn) == 0) {
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gn->mtime = now;
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}
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if (gn->cmtime > gn->mtime)
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gn->mtime = gn->cmtime;
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if (DEBUG(MAKE)) {
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printf("update time: %s\n", Targ_FmtTime(gn->mtime));
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}
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#endif
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if (!(gn->type & OP_EXEC)) {
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pgn->childMade = TRUE;
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Make_TimeStamp(pgn, gn);
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}
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} else if (keepgoing) {
|
||
pgn->make = FALSE;
|
||
} else {
|
||
printf ("\n\nStop.\n");
|
||
exit (1);
|
||
}
|
||
} else if (gn->made == ERROR) {
|
||
/*
|
||
* Already had an error when making this beastie. Tell the parent
|
||
* to abort.
|
||
*/
|
||
pgn->make = FALSE;
|
||
} else {
|
||
if (Lst_Member (gn->iParents, pgn) != NILLNODE) {
|
||
char *p1;
|
||
Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
|
||
if (p1)
|
||
free(p1);
|
||
}
|
||
switch(gn->made) {
|
||
case BEINGMADE:
|
||
Error("Graph cycles through %s\n", gn->name);
|
||
gn->made = ERROR;
|
||
pgn->make = FALSE;
|
||
break;
|
||
case MADE:
|
||
if ((gn->type & OP_EXEC) == 0) {
|
||
pgn->childMade = TRUE;
|
||
Make_TimeStamp(pgn, gn);
|
||
}
|
||
break;
|
||
case UPTODATE:
|
||
if ((gn->type & OP_EXEC) == 0) {
|
||
Make_TimeStamp(pgn, gn);
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return (0);
|
||
}
|
||
|
||
/*-
|
||
*-----------------------------------------------------------------------
|
||
* Compat_Run --
|
||
* Initialize this mode and start making.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side Effects:
|
||
* Guess what?
|
||
*
|
||
*-----------------------------------------------------------------------
|
||
*/
|
||
void
|
||
Compat_Run(targs)
|
||
Lst targs; /* List of target nodes to re-create */
|
||
{
|
||
char *cp; /* Pointer to string of shell meta-characters */
|
||
GNode *gn = NULL;/* Current root target */
|
||
int errors; /* Number of targets not remade due to errors */
|
||
|
||
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
|
||
signal(SIGINT, CompatInterrupt);
|
||
}
|
||
if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
|
||
signal(SIGTERM, CompatInterrupt);
|
||
}
|
||
if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
|
||
signal(SIGHUP, CompatInterrupt);
|
||
}
|
||
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
|
||
signal(SIGQUIT, CompatInterrupt);
|
||
}
|
||
|
||
for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
|
||
meta[(unsigned char) *cp] = 1;
|
||
}
|
||
/*
|
||
* The null character serves as a sentinel in the string.
|
||
*/
|
||
meta[0] = 1;
|
||
|
||
ENDNode = Targ_FindNode(".END", TARG_CREATE);
|
||
/*
|
||
* If the user has defined a .BEGIN target, execute the commands attached
|
||
* to it.
|
||
*/
|
||
if (!queryFlag) {
|
||
gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
|
||
if (gn != NILGNODE) {
|
||
Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn);
|
||
if (gn->made == ERROR) {
|
||
printf("\n\nStop.\n");
|
||
exit(1);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Expand .USE nodes right now, because they can modify the structure
|
||
* of the tree.
|
||
*/
|
||
Lst_Destroy(Make_ExpandUse(targs), NOFREE);
|
||
|
||
/*
|
||
* For each entry in the list of targets to create, call CompatMake on
|
||
* it to create the thing. CompatMake will leave the 'made' field of gn
|
||
* in one of several states:
|
||
* UPTODATE gn was already up-to-date
|
||
* MADE gn was recreated successfully
|
||
* ERROR An error occurred while gn was being created
|
||
* ABORTED gn was not remade because one of its inferiors
|
||
* could not be made due to errors.
|
||
*/
|
||
errors = 0;
|
||
while (!Lst_IsEmpty (targs)) {
|
||
gn = (GNode *) Lst_DeQueue (targs);
|
||
CompatMake (gn, gn);
|
||
|
||
if (gn->made == UPTODATE) {
|
||
printf ("`%s' is up to date.\n", gn->name);
|
||
} else if (gn->made == ABORTED) {
|
||
printf ("`%s' not remade because of errors.\n", gn->name);
|
||
errors += 1;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* If the user has defined a .END target, run its commands.
|
||
*/
|
||
if (errors == 0) {
|
||
Lst_ForEach(ENDNode->commands, CompatRunCommand, (ClientData)gn);
|
||
}
|
||
}
|