758 lines
19 KiB
C
758 lines
19 KiB
C
/* $NetBSD: compat.c,v 1.238 2022/01/22 18:59:23 rillig Exp $ */
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/*
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* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1988, 1989 by Adam de Boor
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* 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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "wait.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 "dir.h"
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#include "job.h"
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#include "metachar.h"
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#include "pathnames.h"
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/* "@(#)compat.c 8.2 (Berkeley) 3/19/94" */
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MAKE_RCSID("$NetBSD: compat.c,v 1.238 2022/01/22 18:59:23 rillig Exp $");
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static GNode *curTarg = NULL;
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static pid_t compatChild;
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static int compatSigno;
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/*
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* CompatDeleteTarget -- delete the file of a failed, interrupted, or
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* otherwise duffed target if not inhibited by .PRECIOUS.
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*/
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static void
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CompatDeleteTarget(GNode *gn)
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{
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if (gn != NULL && !GNode_IsPrecious(gn)) {
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const char *file = GNode_VarTarget(gn);
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if (!opts.noExecute && unlink_file(file)) {
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Error("*** %s removed", file);
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}
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}
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}
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/*
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* Interrupt the creation of the current target and remove it if it ain't
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* precious. Then exit.
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*
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* If .INTERRUPT exists, its commands are run first WITH INTERRUPTS IGNORED.
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*
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* XXX: is .PRECIOUS supposed to inhibit .INTERRUPT? I doubt it, but I've
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* left the logic alone for now. - dholland 20160826
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*/
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static void
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CompatInterrupt(int signo)
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{
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CompatDeleteTarget(curTarg);
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if (curTarg != NULL && !GNode_IsPrecious(curTarg)) {
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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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GNode *gn = Targ_FindNode(".INTERRUPT");
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if (gn != NULL) {
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Compat_Make(gn, gn);
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}
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}
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}
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if (signo == SIGQUIT)
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_exit(signo);
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/*
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* If there is a child running, pass the signal on.
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* We will exist after it has exited.
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*/
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compatSigno = signo;
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if (compatChild > 0) {
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KILLPG(compatChild, signo);
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} else {
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bmake_signal(signo, SIG_DFL);
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kill(myPid, signo);
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}
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}
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static void
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DebugFailedTarget(const char *cmd, const GNode *gn)
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{
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const char *p = cmd;
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debug_printf("\n*** Failed target: %s\n*** Failed command: ",
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gn->name);
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/*
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* Replace runs of whitespace with a single space, to reduce the
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* amount of whitespace for multi-line command lines.
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*/
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while (*p != '\0') {
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if (ch_isspace(*p)) {
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debug_printf(" ");
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cpp_skip_whitespace(&p);
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} else {
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debug_printf("%c", *p);
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p++;
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}
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}
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debug_printf("\n");
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}
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static bool
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UseShell(const char *cmd MAKE_ATTR_UNUSED)
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{
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#if defined(FORCE_USE_SHELL) || !defined(MAKE_NATIVE)
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/*
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* In a non-native build, the host environment might be weird enough
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* that it's necessary to go through a shell to get the correct
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* behaviour. Or perhaps the shell has been replaced with something
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* that does extra logging, and that should not be bypassed.
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*/
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return true;
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#else
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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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* Additionally variable assignments and empty commands
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* go to the shell. Therefore treat '=' and ':' like shell
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* meta characters as documented in make(1).
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*/
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return needshell(cmd);
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#endif
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}
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/*
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* Execute the next command for a target. If the command returns an error,
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* the node's made field is set to ERROR and creation stops.
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*
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* Input:
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* cmdp Command to execute
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* gn Node from which the command came
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* ln List node that contains the command
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*
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* Results:
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* true if the command succeeded.
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*/
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bool
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Compat_RunCommand(const char *cmdp, GNode *gn, StringListNode *ln)
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{
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char *cmdStart; /* Start of expanded command */
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char *bp;
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bool silent; /* Don't print command */
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bool doIt; /* Execute even if -n */
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volatile bool errCheck; /* Check errors */
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WAIT_T reason; /* Reason for child's death */
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WAIT_T status; /* Description of child's death */
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pid_t cpid; /* Child actually found */
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pid_t retstat; /* Result of wait */
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const char **volatile av; /* Argument vector for thing to exec */
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char **volatile mav; /* Copy of the argument vector for freeing */
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bool useShell; /* True if command should be executed using a
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* shell */
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const char *volatile cmd = cmdp;
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silent = (gn->type & OP_SILENT) != OP_NONE;
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errCheck = !(gn->type & OP_IGNORE);
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doIt = false;
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(void)Var_Subst(cmd, gn, VARE_WANTRES, &cmdStart);
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/* TODO: handle errors */
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if (cmdStart[0] == '\0') {
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free(cmdStart);
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return true;
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}
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cmd = cmdStart;
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LstNode_Set(ln, cmdStart);
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if (gn->type & OP_SAVE_CMDS) {
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GNode *endNode = Targ_GetEndNode();
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if (gn != endNode) {
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/*
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* Append the expanded command, to prevent the
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* local variables from being interpreted in the
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* scope of the .END node.
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*
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* A probably unintended side effect of this is that
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* the expanded command will be expanded again in the
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* .END node. Therefore, a literal '$' in these
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* commands must be written as '$$$$' instead of the
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* usual '$$'.
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*/
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Lst_Append(&endNode->commands, cmdStart);
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return true;
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}
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}
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if (strcmp(cmdStart, "...") == 0) {
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gn->type |= OP_SAVE_CMDS;
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return true;
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}
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for (;;) {
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if (*cmd == '@')
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silent = !DEBUG(LOUD);
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else if (*cmd == '-')
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errCheck = false;
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else if (*cmd == '+') {
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doIt = true;
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if (shellName == NULL) /* we came here from jobs */
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Shell_Init();
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} else
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break;
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cmd++;
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}
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while (ch_isspace(*cmd))
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cmd++;
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/*
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* If we did not end up with a command, just skip it.
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*/
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if (cmd[0] == '\0')
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return true;
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useShell = UseShell(cmd);
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/*
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* Print the command before echoing if we're not supposed to be quiet
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* for this one. We also print the command if -n given.
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*/
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if (!silent || !GNode_ShouldExecute(gn)) {
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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 (!doIt && !GNode_ShouldExecute(gn))
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return true;
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DEBUG1(JOB, "Execute: '%s'\n", cmd);
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if (useShell) {
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/*
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* We need to pass the command off to the shell, typically
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* because the command contains a "meta" character.
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*/
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static const char *shargv[5];
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/* The following work for any of the builtin shell specs. */
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int shargc = 0;
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shargv[shargc++] = shellPath;
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if (errCheck && shellErrFlag != NULL)
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shargv[shargc++] = shellErrFlag;
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shargv[shargc++] = DEBUG(SHELL) ? "-xc" : "-c";
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shargv[shargc++] = cmd;
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shargv[shargc] = NULL;
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av = shargv;
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bp = NULL;
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mav = NULL;
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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
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* command into words to form an argument vector we can
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* execute.
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*/
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Words words = Str_Words(cmd, false);
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mav = words.words;
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bp = words.freeIt;
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av = (void *)mav;
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}
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#ifdef USE_META
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if (useMeta)
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meta_compat_start();
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#endif
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Var_ReexportVars();
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compatChild = cpid = vfork();
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if (cpid < 0)
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Fatal("Could not fork");
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if (cpid == 0) {
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#ifdef USE_META
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if (useMeta)
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meta_compat_child();
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#endif
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(void)execvp(av[0], (char *const *)UNCONST(av));
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execDie("exec", av[0]);
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}
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free(mav);
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free(bp);
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/* XXX: Memory management looks suspicious here. */
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/* XXX: Setting a list item to NULL is unexpected. */
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LstNode_SetNull(ln);
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#ifdef USE_META
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if (useMeta)
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meta_compat_parent(cpid);
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#endif
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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 ((retstat = wait(&reason)) != cpid) {
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if (retstat > 0)
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JobReapChild(retstat, reason, false); /* not ours? */
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if (retstat == -1 && errno != EINTR) {
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break;
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}
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}
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if (retstat < 0)
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Fatal("error in wait: %d: %s", retstat, strerror(errno));
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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 defined(USE_META) && defined(USE_FILEMON_ONCE)
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if (useMeta)
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meta_cmd_finish(NULL);
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#endif
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if (status != 0) {
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if (DEBUG(ERROR))
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DebugFailedTarget(cmd, gn);
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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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#ifdef USE_META
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if (useMeta)
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meta_job_error(NULL, gn, false, status);
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#endif
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gn->made = ERROR;
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if (opts.keepgoing) {
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/*
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* Abort the current target,
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* but let others continue.
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*/
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printf(" (continuing)\n");
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} else {
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printf("\n");
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}
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if (deleteOnError)
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CompatDeleteTarget(gn);
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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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free(cmdStart);
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compatChild = 0;
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if (compatSigno != 0) {
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bmake_signal(compatSigno, SIG_DFL);
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kill(myPid, compatSigno);
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}
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return status == 0;
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}
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static void
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RunCommands(GNode *gn)
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{
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StringListNode *ln;
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for (ln = gn->commands.first; ln != NULL; ln = ln->next) {
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const char *cmd = ln->datum;
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if (!Compat_RunCommand(cmd, gn, ln))
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break;
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}
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}
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static void
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MakeNodes(GNodeList *gnodes, GNode *pgn)
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{
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GNodeListNode *ln;
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for (ln = gnodes->first; ln != NULL; ln = ln->next) {
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GNode *cohort = ln->datum;
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Compat_Make(cohort, pgn);
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}
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}
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static bool
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MakeUnmade(GNode *gn, GNode *pgn)
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{
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assert(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 to false
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* again. This is our signal to not attempt to do anything but abort
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* our parent as well.
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*/
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gn->flags.remake = true;
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gn->made = BEINGMADE;
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if (!(gn->type & OP_MADE))
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Suff_FindDeps(gn);
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MakeNodes(&gn->children, gn);
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if (!gn->flags.remake) {
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gn->made = ABORTED;
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pgn->flags.remake = false;
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return false;
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}
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if (Lst_FindDatum(&gn->implicitParents, pgn) != NULL)
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Var_Set(pgn, IMPSRC, GNode_VarTarget(gn));
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/*
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* All the children were made ok. Now youngestChild->mtime contains the
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* modification time of the newest child, we need to find out if we
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* exist and when we were modified last. The criteria for datedness
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* are defined by GNode_IsOODate.
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*/
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DEBUG1(MAKE, "Examining %s...", gn->name);
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if (!GNode_IsOODate(gn)) {
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gn->made = UPTODATE;
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DEBUG0(MAKE, "up-to-date.\n");
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return false;
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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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DEBUG0(MAKE, "out-of-date.\n");
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if (opts.query)
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exit(1);
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/*
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* We need to be re-made.
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* Ensure that $? (.OODATE) and $> (.ALLSRC) are both set.
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*/
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GNode_SetLocalVars(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 Compat_RunCommand knows what to do.
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*/
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if (opts.ignoreErrors)
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gn->type |= OP_IGNORE;
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if (opts.silent)
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gn->type |= OP_SILENT;
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if (Job_CheckCommands(gn, Fatal)) {
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/*
|
|
* Our commands are ok, but we still have to worry about
|
|
* the -t flag.
|
|
*/
|
|
if (!opts.touch || (gn->type & OP_MAKE)) {
|
|
curTarg = gn;
|
|
#ifdef USE_META
|
|
if (useMeta && GNode_ShouldExecute(gn))
|
|
meta_job_start(NULL, gn);
|
|
#endif
|
|
RunCommands(gn);
|
|
curTarg = NULL;
|
|
} else {
|
|
Job_Touch(gn, (gn->type & OP_SILENT) != OP_NONE);
|
|
}
|
|
} else {
|
|
gn->made = ERROR;
|
|
}
|
|
#ifdef USE_META
|
|
if (useMeta && GNode_ShouldExecute(gn)) {
|
|
if (meta_job_finish(NULL) != 0)
|
|
gn->made = ERROR;
|
|
}
|
|
#endif
|
|
|
|
if (gn->made != ERROR) {
|
|
/*
|
|
* If the node was made successfully, mark it so, update
|
|
* its modification time and timestamp all its parents.
|
|
* This is to keep its state from affecting that of its parent.
|
|
*/
|
|
gn->made = MADE;
|
|
if (Make_Recheck(gn) == 0)
|
|
pgn->flags.force = true;
|
|
if (!(gn->type & OP_EXEC)) {
|
|
pgn->flags.childMade = true;
|
|
GNode_UpdateYoungestChild(pgn, gn);
|
|
}
|
|
} else if (opts.keepgoing) {
|
|
pgn->flags.remake = false;
|
|
} else {
|
|
PrintOnError(gn, "\nStop.\n");
|
|
exit(1);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
MakeOther(GNode *gn, GNode *pgn)
|
|
{
|
|
|
|
if (Lst_FindDatum(&gn->implicitParents, pgn) != NULL) {
|
|
const char *target = GNode_VarTarget(gn);
|
|
Var_Set(pgn, IMPSRC, target != NULL ? target : "");
|
|
}
|
|
|
|
switch (gn->made) {
|
|
case BEINGMADE:
|
|
Error("Graph cycles through %s", gn->name);
|
|
gn->made = ERROR;
|
|
pgn->flags.remake = false;
|
|
break;
|
|
case MADE:
|
|
if (!(gn->type & OP_EXEC)) {
|
|
pgn->flags.childMade = true;
|
|
GNode_UpdateYoungestChild(pgn, gn);
|
|
}
|
|
break;
|
|
case UPTODATE:
|
|
if (!(gn->type & OP_EXEC))
|
|
GNode_UpdateYoungestChild(pgn, gn);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make a target.
|
|
*
|
|
* If an error is detected and not being ignored, the process exits.
|
|
*
|
|
* Input:
|
|
* gn The node to make
|
|
* pgn Parent to abort if necessary
|
|
*
|
|
* Output:
|
|
* gn->made
|
|
* UPTODATE gn was already up-to-date.
|
|
* MADE gn was recreated successfully.
|
|
* ERROR An error occurred while gn was being created,
|
|
* either due to missing commands or in -k mode.
|
|
* ABORTED gn was not remade because one of its
|
|
* dependencies could not be made due to errors.
|
|
*/
|
|
void
|
|
Compat_Make(GNode *gn, GNode *pgn)
|
|
{
|
|
if (shellName == NULL) /* we came here from jobs */
|
|
Shell_Init();
|
|
|
|
if (gn->made == UNMADE && (gn == pgn || !(pgn->type & OP_MADE))) {
|
|
if (!MakeUnmade(gn, pgn))
|
|
goto cohorts;
|
|
|
|
/* XXX: Replace with GNode_IsError(gn) */
|
|
} else if (gn->made == ERROR) {
|
|
/*
|
|
* Already had an error when making this.
|
|
* Tell the parent to abort.
|
|
*/
|
|
pgn->flags.remake = false;
|
|
} else {
|
|
MakeOther(gn, pgn);
|
|
}
|
|
|
|
cohorts:
|
|
MakeNodes(&gn->cohorts, pgn);
|
|
}
|
|
|
|
static void
|
|
MakeBeginNode(void)
|
|
{
|
|
GNode *gn = Targ_FindNode(".BEGIN");
|
|
if (gn == NULL)
|
|
return;
|
|
|
|
Compat_Make(gn, gn);
|
|
if (GNode_IsError(gn)) {
|
|
PrintOnError(gn, "\nStop.\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static void
|
|
InitSignals(void)
|
|
{
|
|
if (bmake_signal(SIGINT, SIG_IGN) != SIG_IGN)
|
|
bmake_signal(SIGINT, CompatInterrupt);
|
|
if (bmake_signal(SIGTERM, SIG_IGN) != SIG_IGN)
|
|
bmake_signal(SIGTERM, CompatInterrupt);
|
|
if (bmake_signal(SIGHUP, SIG_IGN) != SIG_IGN)
|
|
bmake_signal(SIGHUP, CompatInterrupt);
|
|
if (bmake_signal(SIGQUIT, SIG_IGN) != SIG_IGN)
|
|
bmake_signal(SIGQUIT, CompatInterrupt);
|
|
}
|
|
|
|
/*
|
|
* Initialize this module and start making.
|
|
*
|
|
* Input:
|
|
* targs The target nodes to re-create
|
|
*/
|
|
void
|
|
Compat_Run(GNodeList *targs)
|
|
{
|
|
GNode *errorNode = NULL;
|
|
|
|
if (shellName == NULL)
|
|
Shell_Init();
|
|
|
|
InitSignals();
|
|
|
|
/*
|
|
* Create the .END node now, to keep the (debug) output of the
|
|
* counter.mk test the same as before 2020-09-23. This
|
|
* implementation detail probably doesn't matter though.
|
|
*/
|
|
(void)Targ_GetEndNode();
|
|
|
|
if (!opts.query)
|
|
MakeBeginNode();
|
|
|
|
/*
|
|
* Expand .USE nodes right now, because they can modify the structure
|
|
* of the tree.
|
|
*/
|
|
Make_ExpandUse(targs);
|
|
|
|
while (!Lst_IsEmpty(targs)) {
|
|
GNode *gn = Lst_Dequeue(targs);
|
|
Compat_Make(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);
|
|
}
|
|
if (GNode_IsError(gn) && errorNode == NULL)
|
|
errorNode = gn;
|
|
}
|
|
|
|
/* If the user has defined a .END target, run its commands. */
|
|
if (errorNode == NULL) {
|
|
GNode *endNode = Targ_GetEndNode();
|
|
Compat_Make(endNode, endNode);
|
|
if (GNode_IsError(endNode))
|
|
errorNode = endNode;
|
|
}
|
|
|
|
if (errorNode != NULL) {
|
|
if (DEBUG(GRAPH2))
|
|
Targ_PrintGraph(2);
|
|
else if (DEBUG(GRAPH3))
|
|
Targ_PrintGraph(3);
|
|
PrintOnError(errorNode, "\nStop.\n");
|
|
exit(1);
|
|
}
|
|
}
|