File: [cvs.NetBSD.org] / src / usr.bin / make / parse.c (download)
Revision 1.130, Thu Jan 18 20:22:44 2007 UTC (17 years, 3 months ago) by dsl
Branch: MAIN
Changes since 1.129: +5 -5
lines
Don't delete '\' from before '#' in shell command lines.
Probably fixes build of pkgsrc:editors/xemacs.
Pointed out by Richard Earnshaw.
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/* $NetBSD: parse.c,v 1.130 2007/01/18 20:22:44 dsl Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef MAKE_NATIVE
static char rcsid[] = "$NetBSD: parse.c,v 1.130 2007/01/18 20:22:44 dsl Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)parse.c 8.3 (Berkeley) 3/19/94";
#else
__RCSID("$NetBSD: parse.c,v 1.130 2007/01/18 20:22:44 dsl Exp $");
#endif
#endif /* not lint */
#endif
/*-
* parse.c --
* Functions to parse a makefile.
*
* One function, Parse_Init, must be called before any functions
* in this module are used. After that, the function Parse_File is the
* main entry point and controls most of the other functions in this
* module.
*
* Most important structures are kept in Lsts. Directories for
* the .include "..." function are kept in the 'parseIncPath' Lst, while
* those for the .include <...> are kept in the 'sysIncPath' Lst. The
* targets currently being defined are kept in the 'targets' Lst.
*
* The variables 'fname' and 'lineno' are used to track the name
* of the current file and the line number in that file so that error
* messages can be more meaningful.
*
* Interface:
* Parse_Init Initialization function which must be
* called before anything else in this module
* is used.
*
* Parse_End Cleanup the module
*
* Parse_File Function used to parse a makefile. It must
* be given the name of the file, which should
* already have been opened, and a function
* to call to read a character from the file.
*
* Parse_IsVar Returns TRUE if the given line is a
* variable assignment. Used by MainParseArgs
* to determine if an argument is a target
* or a variable assignment. Used internally
* for pretty much the same thing...
*
* Parse_Error Function called when an error occurs in
* parsing. Used by the variable and
* conditional modules.
* Parse_MainName Returns a Lst of the main target to create.
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include "make.h"
#include "hash.h"
#include "dir.h"
#include "job.h"
#include "buf.h"
#include "pathnames.h"
/*
* These values are returned by ParseEOF to tell Parse_File whether to
* CONTINUE parsing, i.e. it had only reached the end of an include file,
* or if it's DONE.
*/
#define CONTINUE 1
#define DONE 0
static Lst targets; /* targets we're working on */
#ifdef CLEANUP
static Lst targCmds; /* command lines for targets */
#endif
static Boolean inLine; /* true if currently in a dependency
* line or its commands */
static int fatals = 0;
static GNode *mainNode; /* The main target to create. This is the
* first target on the first dependency
* line in the first makefile */
typedef struct IFile {
const char *fname; /* name of file */
int lineno; /* line number in file */
int fd; /* the open file */
char *P_str; /* point to base of string buffer */
char *P_ptr; /* point to next char of string buffer */
char *P_end; /* point to the end of string buffer */
int P_buflen; /* current size of file buffer */
} IFile;
#define IFILE_BUFLEN 0x8000
static IFile *curFile;
/*
* Definitions for handling #include specifications
*/
static Lst includes; /* stack of IFiles generated by .includes */
Lst parseIncPath; /* list of directories for "..." includes */
Lst sysIncPath; /* list of directories for <...> includes */
Lst defIncPath; /* default directories for <...> includes */
/*-
* specType contains the SPECial TYPE of the current target. It is
* Not if the target is unspecial. If it *is* special, however, the children
* are linked as children of the parent but not vice versa. This variable is
* set in ParseDoDependency
*/
typedef enum {
Begin, /* .BEGIN */
Default, /* .DEFAULT */
End, /* .END */
Ignore, /* .IGNORE */
Includes, /* .INCLUDES */
Interrupt, /* .INTERRUPT */
Libs, /* .LIBS */
MFlags, /* .MFLAGS or .MAKEFLAGS */
Main, /* .MAIN and we don't have anything user-specified to
* make */
NoExport, /* .NOEXPORT */
NoPath, /* .NOPATH */
Not, /* Not special */
NotParallel, /* .NOTPARALLEL */
Null, /* .NULL */
ExObjdir, /* .OBJDIR */
Order, /* .ORDER */
Parallel, /* .PARALLEL */
ExPath, /* .PATH */
Phony, /* .PHONY */
#ifdef POSIX
Posix, /* .POSIX */
#endif
Precious, /* .PRECIOUS */
ExShell, /* .SHELL */
Silent, /* .SILENT */
SingleShell, /* .SINGLESHELL */
Suffixes, /* .SUFFIXES */
Wait, /* .WAIT */
Attribute /* Generic attribute */
} ParseSpecial;
static ParseSpecial specType;
#define LPAREN '('
#define RPAREN ')'
/*
* Predecessor node for handling .ORDER. Initialized to NILGNODE when .ORDER
* seen, then set to each successive source on the line.
*/
static GNode *predecessor;
/*
* The parseKeywords table is searched using binary search when deciding
* if a target or source is special. The 'spec' field is the ParseSpecial
* type of the keyword ("Not" if the keyword isn't special as a target) while
* the 'op' field is the operator to apply to the list of targets if the
* keyword is used as a source ("0" if the keyword isn't special as a source)
*/
static struct {
const char *name; /* Name of keyword */
ParseSpecial spec; /* Type when used as a target */
int op; /* Operator when used as a source */
} parseKeywords[] = {
{ ".BEGIN", Begin, 0 },
{ ".DEFAULT", Default, 0 },
{ ".END", End, 0 },
{ ".EXEC", Attribute, OP_EXEC },
{ ".IGNORE", Ignore, OP_IGNORE },
{ ".INCLUDES", Includes, 0 },
{ ".INTERRUPT", Interrupt, 0 },
{ ".INVISIBLE", Attribute, OP_INVISIBLE },
{ ".JOIN", Attribute, OP_JOIN },
{ ".LIBS", Libs, 0 },
{ ".MADE", Attribute, OP_MADE },
{ ".MAIN", Main, 0 },
{ ".MAKE", Attribute, OP_MAKE },
{ ".MAKEFLAGS", MFlags, 0 },
{ ".MFLAGS", MFlags, 0 },
{ ".NOPATH", NoPath, OP_NOPATH },
{ ".NOTMAIN", Attribute, OP_NOTMAIN },
{ ".NOTPARALLEL", NotParallel, 0 },
{ ".NO_PARALLEL", NotParallel, 0 },
{ ".NULL", Null, 0 },
{ ".OBJDIR", ExObjdir, 0 },
{ ".OPTIONAL", Attribute, OP_OPTIONAL },
{ ".ORDER", Order, 0 },
{ ".PARALLEL", Parallel, 0 },
{ ".PATH", ExPath, 0 },
{ ".PHONY", Phony, OP_PHONY },
#ifdef POSIX
{ ".POSIX", Posix, 0 },
#endif
{ ".PRECIOUS", Precious, OP_PRECIOUS },
{ ".RECURSIVE", Attribute, OP_MAKE },
{ ".SHELL", ExShell, 0 },
{ ".SILENT", Silent, OP_SILENT },
{ ".SINGLESHELL", SingleShell, 0 },
{ ".SUFFIXES", Suffixes, 0 },
{ ".USE", Attribute, OP_USE },
{ ".USEBEFORE", Attribute, OP_USEBEFORE },
{ ".WAIT", Wait, 0 },
};
static int ParseIsEscaped(const char *, const char *);
static void ParseErrorInternal(const char *, size_t, int, const char *, ...)
__attribute__((__format__(__printf__, 4, 5)));
static void ParseVErrorInternal(FILE *, const char *, size_t, int, const char *, va_list)
__attribute__((__format__(__printf__, 5, 0)));
static int ParseFindKeyword(const char *);
static int ParseLinkSrc(ClientData, ClientData);
static int ParseDoOp(ClientData, ClientData);
static void ParseDoSrc(int, const char *);
static int ParseFindMain(ClientData, ClientData);
static int ParseAddDir(ClientData, ClientData);
static int ParseClearPath(ClientData, ClientData);
static void ParseDoDependency(char *);
static int ParseAddCmd(ClientData, ClientData);
static void ParseHasCommands(ClientData);
static void ParseDoInclude(char *);
static void ParseSetParseFile(const char *);
#ifdef SYSVINCLUDE
static void ParseTraditionalInclude(char *);
#endif
static int ParseEOF(void);
static char *ParseReadLine(void);
static void ParseFinishLine(void);
static void ParseMark(GNode *);
extern int maxJobs;
/*-
*----------------------------------------------------------------------
* ParseIsEscaped --
* Check if the current character is escaped on the current line
*
* Results:
* 0 if the character is not backslash escaped, 1 otherwise
*
* Side Effects:
* None
*----------------------------------------------------------------------
*/
static int
ParseIsEscaped(const char *line, const char *c)
{
int active = 0;
for (;;) {
if (line == c)
return active;
if (*--c != '\\')
return active;
active = !active;
}
}
/*-
*----------------------------------------------------------------------
* ParseFindKeyword --
* Look in the table of keywords for one matching the given string.
*
* Input:
* str String to find
*
* Results:
* The index of the keyword, or -1 if it isn't there.
*
* Side Effects:
* None
*----------------------------------------------------------------------
*/
static int
ParseFindKeyword(const char *str)
{
int start, end, cur;
int diff;
start = 0;
end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1;
do {
cur = start + ((end - start) / 2);
diff = strcmp(str, parseKeywords[cur].name);
if (diff == 0) {
return (cur);
} else if (diff < 0) {
end = cur - 1;
} else {
start = cur + 1;
}
} while (start <= end);
return (-1);
}
/*-
* ParseVErrorInternal --
* Error message abort function for parsing. Prints out the context
* of the error (line number and file) as well as the message with
* two optional arguments.
*
* Results:
* None
*
* Side Effects:
* "fatals" is incremented if the level is PARSE_FATAL.
*/
/* VARARGS */
static void
ParseVErrorInternal(FILE *f, const char *cfname, size_t clineno, int type,
const char *fmt, va_list ap)
{
static Boolean fatal_warning_error_printed = FALSE;
(void)fprintf(f, "%s: \"", progname);
if (*cfname != '/') {
char *cp;
const char *dir;
/*
* Nothing is more anoying than not knowing which Makefile
* is the culprit.
*/
dir = Var_Value(".PARSEDIR", VAR_GLOBAL, &cp);
if (dir == NULL || *dir == '\0' ||
(*dir == '.' && dir[1] == '\0'))
dir = Var_Value(".CURDIR", VAR_GLOBAL, &cp);
if (dir == NULL)
dir = ".";
(void)fprintf(f, "%s/%s", dir, cfname);
} else
(void)fprintf(f, "%s", cfname);
(void)fprintf(f, "\" line %d: ", (int)clineno);
if (type == PARSE_WARNING)
(void)fprintf(f, "warning: ");
(void)vfprintf(f, fmt, ap);
(void)fprintf(f, "\n");
(void)fflush(f);
if (type == PARSE_FATAL || parseWarnFatal)
fatals += 1;
if (parseWarnFatal && !fatal_warning_error_printed) {
Error("parsing warnings being treated as errors");
fatal_warning_error_printed = TRUE;
}
}
/*-
* ParseErrorInternal --
* Error function
*
* Results:
* None
*
* Side Effects:
* None
*/
/* VARARGS */
static void
ParseErrorInternal(const char *cfname, size_t clineno, int type,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap);
va_end(ap);
if (debug_file != NULL && debug_file != stderr) {
va_start(ap, fmt);
ParseVErrorInternal(stderr, cfname, clineno, type, fmt, ap);
va_end(ap);
}
}
/*-
* Parse_Error --
* External interface to ParseErrorInternal; uses the default filename
* Line number.
*
* Results:
* None
*
* Side Effects:
* None
*/
/* VARARGS */
void
Parse_Error(int type, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
ParseVErrorInternal(stderr, curFile->fname, curFile->lineno,
type, fmt, ap);
va_end(ap);
if (debug_file != NULL && debug_file != stderr) {
va_start(ap, fmt);
ParseVErrorInternal(debug_file, curFile->fname, curFile->lineno,
type, fmt, ap);
va_end(ap);
}
}
/*-
*---------------------------------------------------------------------
* ParseLinkSrc --
* Link the parent node to its new child. Used in a Lst_ForEach by
* ParseDoDependency. If the specType isn't 'Not', the parent
* isn't linked as a parent of the child.
*
* Input:
* pgnp The parent node
* cgpn The child node
*
* Results:
* Always = 0
*
* Side Effects:
* New elements are added to the parents list of cgn and the
* children list of cgn. the unmade field of pgn is updated
* to reflect the additional child.
*---------------------------------------------------------------------
*/
static int
ParseLinkSrc(ClientData pgnp, ClientData cgnp)
{
GNode *pgn = (GNode *)pgnp;
GNode *cgn = (GNode *)cgnp;
if ((pgn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (pgn->cohorts))
pgn = (GNode *)Lst_Datum(Lst_Last(pgn->cohorts));
(void)Lst_AtEnd(pgn->children, cgn);
if (specType == Not)
(void)Lst_AtEnd(cgn->parents, pgn);
pgn->unmade += 1;
if (DEBUG(PARSE)) {
fprintf(debug_file, "# ParseLinkSrc: added child %s - %s\n", pgn->name, cgn->name);
Targ_PrintNode(pgn, 0);
Targ_PrintNode(cgn, 0);
}
return (0);
}
/*-
*---------------------------------------------------------------------
* ParseDoOp --
* Apply the parsed operator to the given target node. Used in a
* Lst_ForEach call by ParseDoDependency once all targets have
* been found and their operator parsed. If the previous and new
* operators are incompatible, a major error is taken.
*
* Input:
* gnp The node to which the operator is to be applied
* opp The operator to apply
*
* Results:
* Always 0
*
* Side Effects:
* The type field of the node is altered to reflect any new bits in
* the op.
*---------------------------------------------------------------------
*/
static int
ParseDoOp(ClientData gnp, ClientData opp)
{
GNode *gn = (GNode *)gnp;
int op = *(int *)opp;
/*
* If the dependency mask of the operator and the node don't match and
* the node has actually had an operator applied to it before, and
* the operator actually has some dependency information in it, complain.
*/
if (((op & OP_OPMASK) != (gn->type & OP_OPMASK)) &&
!OP_NOP(gn->type) && !OP_NOP(op))
{
Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", gn->name);
return (1);
}
if ((op == OP_DOUBLEDEP) && ((gn->type & OP_OPMASK) == OP_DOUBLEDEP)) {
/*
* If the node was the object of a :: operator, we need to create a
* new instance of it for the children and commands on this dependency
* line. The new instance is placed on the 'cohorts' list of the
* initial one (note the initial one is not on its own cohorts list)
* and the new instance is linked to all parents of the initial
* instance.
*/
GNode *cohort;
/*
* Propagate copied bits to the initial node. They'll be propagated
* back to the rest of the cohorts later.
*/
gn->type |= op & ~OP_OPMASK;
cohort = Targ_FindNode(gn->name, TARG_NOHASH);
/*
* Make the cohort invisible as well to avoid duplicating it into
* other variables. True, parents of this target won't tend to do
* anything with their local variables, but better safe than
* sorry. (I think this is pointless now, since the relevant list
* traversals will no longer see this node anyway. -mycroft)
*/
cohort->type = op | OP_INVISIBLE;
(void)Lst_AtEnd(gn->cohorts, cohort);
cohort->centurion = gn;
gn->unmade_cohorts += 1;
snprintf(cohort->cohort_num, sizeof cohort->cohort_num, "#%d",
gn->unmade_cohorts);
} else {
/*
* We don't want to nuke any previous flags (whatever they were) so we
* just OR the new operator into the old
*/
gn->type |= op;
}
return (0);
}
/*-
*---------------------------------------------------------------------
* ParseDoSrc --
* Given the name of a source, figure out if it is an attribute
* and apply it to the targets if it is. Else decide if there is
* some attribute which should be applied *to* the source because
* of some special target and apply it if so. Otherwise, make the
* source be a child of the targets in the list 'targets'
*
* Input:
* tOp operator (if any) from special targets
* src name of the source to handle
*
* Results:
* None
*
* Side Effects:
* Operator bits may be added to the list of targets or to the source.
* The targets may have a new source added to their lists of children.
*---------------------------------------------------------------------
*/
static void
ParseDoSrc(int tOp, const char *src)
{
GNode *gn = NULL;
static int wait_number = 0;
char wait_src[16];
if (*src == '.' && isupper ((unsigned char)src[1])) {
int keywd = ParseFindKeyword(src);
if (keywd != -1) {
int op = parseKeywords[keywd].op;
if (op != 0) {
Lst_ForEach(targets, ParseDoOp, &op);
return;
}
if (parseKeywords[keywd].spec == Wait) {
/*
* We add a .WAIT node in the dependency list.
* After any dynamic dependencies (and filename globbing)
* have happened, it is given a dependency on the each
* previous child back to and previous .WAIT node.
* The next child won't be scheduled until the .WAIT node
* is built.
* We give each .WAIT node a unique name (mainly for diag).
*/
snprintf(wait_src, sizeof wait_src, ".WAIT_%u", ++wait_number);
gn = Targ_FindNode(wait_src, TARG_NOHASH);
gn->type = OP_WAIT | OP_PHONY | OP_DEPENDS | OP_NOTMAIN;
Lst_ForEach(targets, ParseLinkSrc, gn);
return;
}
}
}
switch (specType) {
case Main:
/*
* If we have noted the existence of a .MAIN, it means we need
* to add the sources of said target to the list of things
* to create. The string 'src' is likely to be free, so we
* must make a new copy of it. Note that this will only be
* invoked if the user didn't specify a target on the command
* line. This is to allow #ifmake's to succeed, or something...
*/
(void)Lst_AtEnd(create, estrdup(src));
/*
* Add the name to the .TARGETS variable as well, so the user can
* employ that, if desired.
*/
Var_Append(".TARGETS", src, VAR_GLOBAL);
return;
case Order:
/*
* Create proper predecessor/successor links between the previous
* source and the current one.
*/
gn = Targ_FindNode(src, TARG_CREATE);
if (predecessor != NILGNODE) {
(void)Lst_AtEnd(predecessor->order_succ, gn);
(void)Lst_AtEnd(gn->order_pred, predecessor);
if (DEBUG(PARSE)) {
fprintf(debug_file, "# ParseDoSrc: added Order dependency %s - %s\n",
predecessor->name, gn->name);
Targ_PrintNode(predecessor, 0);
Targ_PrintNode(gn, 0);
}
}
/*
* The current source now becomes the predecessor for the next one.
*/
predecessor = gn;
break;
default:
/*
* If the source is not an attribute, we need to find/create
* a node for it. After that we can apply any operator to it
* from a special target or link it to its parents, as
* appropriate.
*
* In the case of a source that was the object of a :: operator,
* the attribute is applied to all of its instances (as kept in
* the 'cohorts' list of the node) or all the cohorts are linked
* to all the targets.
*/
/* Find/create the 'src' node and attach to all targets */
gn = Targ_FindNode(src, TARG_CREATE);
if (tOp) {
gn->type |= tOp;
} else {
Lst_ForEach(targets, ParseLinkSrc, gn);
}
break;
}
}
/*-
*-----------------------------------------------------------------------
* ParseFindMain --
* Find a real target in the list and set it to be the main one.
* Called by ParseDoDependency when a main target hasn't been found
* yet.
*
* Input:
* gnp Node to examine
*
* Results:
* 0 if main not found yet, 1 if it is.
*
* Side Effects:
* mainNode is changed and Targ_SetMain is called.
*
*-----------------------------------------------------------------------
*/
static int
ParseFindMain(ClientData gnp, ClientData dummy)
{
GNode *gn = (GNode *)gnp;
if ((gn->type & OP_NOTARGET) == 0) {
mainNode = gn;
Targ_SetMain(gn);
return (dummy ? 1 : 1);
} else {
return (dummy ? 0 : 0);
}
}
/*-
*-----------------------------------------------------------------------
* ParseAddDir --
* Front-end for Dir_AddDir to make sure Lst_ForEach keeps going
*
* Results:
* === 0
*
* Side Effects:
* See Dir_AddDir.
*
*-----------------------------------------------------------------------
*/
static int
ParseAddDir(ClientData path, ClientData name)
{
(void)Dir_AddDir((Lst) path, (char *)name);
return(0);
}
/*-
*-----------------------------------------------------------------------
* ParseClearPath --
* Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going
*
* Results:
* === 0
*
* Side Effects:
* See Dir_ClearPath
*
*-----------------------------------------------------------------------
*/
static int
ParseClearPath(ClientData path, ClientData dummy)
{
Dir_ClearPath((Lst) path);
return(dummy ? 0 : 0);
}
/*-
*---------------------------------------------------------------------
* ParseDoDependency --
* Parse the dependency line in line.
*
* Input:
* line the line to parse
*
* Results:
* None
*
* Side Effects:
* The nodes of the sources are linked as children to the nodes of the
* targets. Some nodes may be created.
*
* We parse a dependency line by first extracting words from the line and
* finding nodes in the list of all targets with that name. This is done
* until a character is encountered which is an operator character. Currently
* these are only ! and :. At this point the operator is parsed and the
* pointer into the line advanced until the first source is encountered.
* The parsed operator is applied to each node in the 'targets' list,
* which is where the nodes found for the targets are kept, by means of
* the ParseDoOp function.
* The sources are read in much the same way as the targets were except
* that now they are expanded using the wildcarding scheme of the C-Shell
* and all instances of the resulting words in the list of all targets
* are found. Each of the resulting nodes is then linked to each of the
* targets as one of its children.
* Certain targets are handled specially. These are the ones detailed
* by the specType variable.
* The storing of transformation rules is also taken care of here.
* A target is recognized as a transformation rule by calling
* Suff_IsTransform. If it is a transformation rule, its node is gotten
* from the suffix module via Suff_AddTransform rather than the standard
* Targ_FindNode in the target module.
*---------------------------------------------------------------------
*/
static void
ParseDoDependency(char *line)
{
char *cp; /* our current position */
GNode *gn = NULL; /* a general purpose temporary node */
int op; /* the operator on the line */
char savec; /* a place to save a character */
Lst paths; /* List of search paths to alter when parsing
* a list of .PATH targets */
int tOp; /* operator from special target */
Lst sources; /* list of archive source names after
* expansion */
Lst curTargs; /* list of target names to be found and added
* to the targets list */
char *lstart = line;
if (DEBUG(PARSE))
fprintf(debug_file, "ParseDoDependency(%s)\n", line);
tOp = 0;
specType = Not;
paths = (Lst)NULL;
curTargs = Lst_Init(FALSE);
do {
for (cp = line; *cp && (ParseIsEscaped(lstart, cp) ||
!(isspace((unsigned char)*cp) ||
*cp == '!' || *cp == ':' || *cp == LPAREN));
cp++) {
if (*cp == '$') {
/*
* Must be a dynamic source (would have been expanded
* otherwise), so call the Var module to parse the puppy
* so we can safely advance beyond it...There should be
* no errors in this, as they would have been discovered
* in the initial Var_Subst and we wouldn't be here.
*/
int length;
void *freeIt;
char *result;
result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt);
if (freeIt)
free(freeIt);
cp += length-1;
}
}
if (!ParseIsEscaped(lstart, cp) && *cp == LPAREN) {
/*
* Archives must be handled specially to make sure the OP_ARCHV
* flag is set in their 'type' field, for one thing, and because
* things like "archive(file1.o file2.o file3.o)" are permissible.
* Arch_ParseArchive will set 'line' to be the first non-blank
* after the archive-spec. It creates/finds nodes for the members
* and places them on the given list, returning SUCCESS if all
* went well and FAILURE if there was an error in the
* specification. On error, line should remain untouched.
*/
if (Arch_ParseArchive(&line, targets, VAR_CMD) != SUCCESS) {
Parse_Error(PARSE_FATAL,
"Error in archive specification: \"%s\"", line);
goto out;
} else {
continue;
}
}
savec = *cp;
if (!*cp) {
/*
* Ending a dependency line without an operator is a Bozo
* no-no. As a heuristic, this is also often triggered by
* undetected conflicts from cvs/rcs merges.
*/
if ((strncmp(line, "<<<<<<", 6) == 0) ||
(strncmp(line, "======", 6) == 0) ||
(strncmp(line, ">>>>>>", 6) == 0))
Parse_Error(PARSE_FATAL,
"Makefile appears to contain unresolved cvs/rcs/??? merge conflicts");
else
Parse_Error(PARSE_FATAL, "Need an operator");
goto out;
}
*cp = '\0';
/*
* Have a word in line. See if it's a special target and set
* specType to match it.
*/
if (*line == '.' && isupper ((unsigned char)line[1])) {
/*
* See if the target is a special target that must have it
* or its sources handled specially.
*/
int keywd = ParseFindKeyword(line);
if (keywd != -1) {
if (specType == ExPath && parseKeywords[keywd].spec != ExPath) {
Parse_Error(PARSE_FATAL, "Mismatched special targets");
goto out;
}
specType = parseKeywords[keywd].spec;
tOp = parseKeywords[keywd].op;
/*
* Certain special targets have special semantics:
* .PATH Have to set the dirSearchPath
* variable too
* .MAIN Its sources are only used if
* nothing has been specified to
* create.
* .DEFAULT Need to create a node to hang
* commands on, but we don't want
* it in the graph, nor do we want
* it to be the Main Target, so we
* create it, set OP_NOTMAIN and
* add it to the list, setting
* DEFAULT to the new node for
* later use. We claim the node is
* A transformation rule to make
* life easier later, when we'll
* use Make_HandleUse to actually
* apply the .DEFAULT commands.
* .PHONY The list of targets
* .NOPATH Don't search for file in the path
* .BEGIN
* .END
* .INTERRUPT Are not to be considered the
* main target.
* .NOTPARALLEL Make only one target at a time.
* .SINGLESHELL Create a shell for each command.
* .ORDER Must set initial predecessor to NIL
*/
switch (specType) {
case ExPath:
if (paths == NULL) {
paths = Lst_Init(FALSE);
}
(void)Lst_AtEnd(paths, dirSearchPath);
break;
case Main:
if (!Lst_IsEmpty(create)) {
specType = Not;
}
break;
case Begin:
case End:
case Interrupt:
gn = Targ_FindNode(line, TARG_CREATE);
gn->type |= OP_NOTMAIN|OP_SPECIAL;
(void)Lst_AtEnd(targets, gn);
break;
case Default:
gn = Targ_NewGN(".DEFAULT");
gn->type |= (OP_NOTMAIN|OP_TRANSFORM);
(void)Lst_AtEnd(targets, gn);
DEFAULT = gn;
break;
case NotParallel:
maxJobs = 1;
break;
case SingleShell:
compatMake = TRUE;
break;
case Order:
predecessor = NILGNODE;
break;
default:
break;
}
} else if (strncmp(line, ".PATH", 5) == 0) {
/*
* .PATH<suffix> has to be handled specially.
* Call on the suffix module to give us a path to
* modify.
*/
Lst path;
specType = ExPath;
path = Suff_GetPath(&line[5]);
if (path == NILLST) {
Parse_Error(PARSE_FATAL,
"Suffix '%s' not defined (yet)",
&line[5]);
goto out;
} else {
if (paths == (Lst)NULL) {
paths = Lst_Init(FALSE);
}
(void)Lst_AtEnd(paths, path);
}
}
}
/*
* Have word in line. Get or create its node and stick it at
* the end of the targets list
*/
if ((specType == Not) && (*line != '\0')) {
if (Dir_HasWildcards(line)) {
/*
* Targets are to be sought only in the current directory,
* so create an empty path for the thing. Note we need to
* use Dir_Destroy in the destruction of the path as the
* Dir module could have added a directory to the path...
*/
Lst emptyPath = Lst_Init(FALSE);
Dir_Expand(line, emptyPath, curTargs);
Lst_Destroy(emptyPath, Dir_Destroy);
} else {
/*
* No wildcards, but we want to avoid code duplication,
* so create a list with the word on it.
*/
(void)Lst_AtEnd(curTargs, line);
}
while(!Lst_IsEmpty(curTargs)) {
char *targName = (char *)Lst_DeQueue(curTargs);
if (!Suff_IsTransform (targName)) {
gn = Targ_FindNode(targName, TARG_CREATE);
} else {
gn = Suff_AddTransform(targName);
}
(void)Lst_AtEnd(targets, gn);
}
} else if (specType == ExPath && *line != '.' && *line != '\0') {
Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", line);
}
*cp = savec;
/*
* If it is a special type and not .PATH, it's the only target we
* allow on this line...
*/
if (specType != Not && specType != ExPath) {
Boolean warning = FALSE;
while (*cp && (ParseIsEscaped(lstart, cp) ||
((*cp != '!') && (*cp != ':')))) {
if (ParseIsEscaped(lstart, cp) ||
(*cp != ' ' && *cp != '\t')) {
warning = TRUE;
}
cp++;
}
if (warning) {
Parse_Error(PARSE_WARNING, "Extra target ignored");
}
} else {
while (*cp && isspace ((unsigned char)*cp)) {
cp++;
}
}
line = cp;
} while (*line && (ParseIsEscaped(lstart, line) ||
((*line != '!') && (*line != ':'))));
/*
* Don't need the list of target names anymore...
*/
Lst_Destroy(curTargs, NOFREE);
curTargs = NULL;
if (!Lst_IsEmpty(targets)) {
switch(specType) {
default:
Parse_Error(PARSE_WARNING, "Special and mundane targets don't mix. Mundane ones ignored");
break;
case Default:
case Begin:
case End:
case Interrupt:
/*
* These four create nodes on which to hang commands, so
* targets shouldn't be empty...
*/
case Not:
/*
* Nothing special here -- targets can be empty if it wants.
*/
break;
}
}
/*
* Have now parsed all the target names. Must parse the operator next. The
* result is left in op .
*/
if (*cp == '!') {
op = OP_FORCE;
} else if (*cp == ':') {
if (cp[1] == ':') {
op = OP_DOUBLEDEP;
cp++;
} else {
op = OP_DEPENDS;
}
} else {
Parse_Error(PARSE_FATAL, "Missing dependency operator");
goto out;
}
cp++; /* Advance beyond operator */
Lst_ForEach(targets, ParseDoOp, &op);
/*
* Get to the first source
*/
while (*cp && isspace ((unsigned char)*cp)) {
cp++;
}
line = cp;
/*
* Several special targets take different actions if present with no
* sources:
* a .SUFFIXES line with no sources clears out all old suffixes
* a .PRECIOUS line makes all targets precious
* a .IGNORE line ignores errors for all targets
* a .SILENT line creates silence when making all targets
* a .PATH removes all directories from the search path(s).
*/
if (!*line) {
switch (specType) {
case Suffixes:
Suff_ClearSuffixes();
break;
case Precious:
allPrecious = TRUE;
break;
case Ignore:
ignoreErrors = TRUE;
break;
case Silent:
beSilent = TRUE;
break;
case ExPath:
Lst_ForEach(paths, ParseClearPath, NULL);
Dir_SetPATH();
break;
#ifdef POSIX
case Posix:
Var_Set("%POSIX", "1003.2", VAR_GLOBAL, 0);
break;
#endif
default:
break;
}
} else if (specType == MFlags) {
/*
* Call on functions in main.c to deal with these arguments and
* set the initial character to a null-character so the loop to
* get sources won't get anything
*/
Main_ParseArgLine(line);
*line = '\0';
} else if (specType == ExShell) {
if (Job_ParseShell(line) != SUCCESS) {
Parse_Error(PARSE_FATAL, "improper shell specification");
goto out;
}
*line = '\0';
} else if ((specType == NotParallel) || (specType == SingleShell)) {
*line = '\0';
}
/*
* NOW GO FOR THE SOURCES
*/
if ((specType == Suffixes) || (specType == ExPath) ||
(specType == Includes) || (specType == Libs) ||
(specType == Null) || (specType == ExObjdir))
{
while (*line) {
/*
* If the target was one that doesn't take files as its sources
* but takes something like suffixes, we take each
* space-separated word on the line as a something and deal
* with it accordingly.
*
* If the target was .SUFFIXES, we take each source as a
* suffix and add it to the list of suffixes maintained by the
* Suff module.
*
* If the target was a .PATH, we add the source as a directory
* to search on the search path.
*
* If it was .INCLUDES, the source is taken to be the suffix of
* files which will be #included and whose search path should
* be present in the .INCLUDES variable.
*
* If it was .LIBS, the source is taken to be the suffix of
* files which are considered libraries and whose search path
* should be present in the .LIBS variable.
*
* If it was .NULL, the source is the suffix to use when a file
* has no valid suffix.
*
* If it was .OBJDIR, the source is a new definition for .OBJDIR,
* and will cause make to do a new chdir to that path.
*/
while (*cp && !isspace ((unsigned char)*cp)) {
cp++;
}
savec = *cp;
*cp = '\0';
switch (specType) {
case Suffixes:
Suff_AddSuffix(line, &mainNode);
break;
case ExPath:
Lst_ForEach(paths, ParseAddDir, line);
break;
case Includes:
Suff_AddInclude(line);
break;
case Libs:
Suff_AddLib(line);
break;
case Null:
Suff_SetNull(line);
break;
case ExObjdir:
Main_SetObjdir(line);
break;
default:
break;
}
*cp = savec;
if (savec != '\0') {
cp++;
}
while (*cp && isspace ((unsigned char)*cp)) {
cp++;
}
line = cp;
}
if (paths) {
Lst_Destroy(paths, NOFREE);
}
if (specType == ExPath)
Dir_SetPATH();
} else {
while (*line) {
/*
* The targets take real sources, so we must beware of archive
* specifications (i.e. things with left parentheses in them)
* and handle them accordingly.
*/
for (; *cp && !isspace ((unsigned char)*cp); cp++) {
if ((*cp == LPAREN) && (cp > line) && (cp[-1] != '$')) {
/*
* Only stop for a left parenthesis if it isn't at the
* start of a word (that'll be for variable changes
* later) and isn't preceded by a dollar sign (a dynamic
* source).
*/
break;
}
}
if (*cp == LPAREN) {
sources = Lst_Init(FALSE);
if (Arch_ParseArchive(&line, sources, VAR_CMD) != SUCCESS) {
Parse_Error(PARSE_FATAL,
"Error in source archive spec \"%s\"", line);
goto out;
}
while (!Lst_IsEmpty (sources)) {
gn = (GNode *)Lst_DeQueue(sources);
ParseDoSrc(tOp, gn->name);
}
Lst_Destroy(sources, NOFREE);
cp = line;
} else {
if (*cp) {
*cp = '\0';
cp += 1;
}
ParseDoSrc(tOp, line);
}
while (*cp && isspace ((unsigned char)*cp)) {
cp++;
}
line = cp;
}
}
if (mainNode == NILGNODE) {
/*
* If we have yet to decide on a main target to make, in the
* absence of any user input, we want the first target on
* the first dependency line that is actually a real target
* (i.e. isn't a .USE or .EXEC rule) to be made.
*/
Lst_ForEach(targets, ParseFindMain, NULL);
}
out:
if (curTargs)
Lst_Destroy(curTargs, NOFREE);
}
/*-
*---------------------------------------------------------------------
* Parse_IsVar --
* Return TRUE if the passed line is a variable assignment. A variable
* assignment consists of a single word followed by optional whitespace
* followed by either a += or an = operator.
* This function is used both by the Parse_File function and main when
* parsing the command-line arguments.
*
* Input:
* line the line to check
*
* Results:
* TRUE if it is. FALSE if it ain't
*
* Side Effects:
* none
*---------------------------------------------------------------------
*/
Boolean
Parse_IsVar(char *line)
{
Boolean wasSpace = FALSE; /* set TRUE if found a space */
Boolean haveName = FALSE; /* Set TRUE if have a variable name */
int level = 0;
#define ISEQOPERATOR(c) \
(((c) == '+') || ((c) == ':') || ((c) == '?') || ((c) == '!'))
/*
* Skip to variable name
*/
for (;(*line == ' ') || (*line == '\t'); line++)
continue;
for (; *line != '=' || level != 0; line++)
switch (*line) {
case '\0':
/*
* end-of-line -- can't be a variable assignment.
*/
return FALSE;
case ' ':
case '\t':
/*
* there can be as much white space as desired so long as there is
* only one word before the operator
*/
wasSpace = TRUE;
break;
case LPAREN:
case '{':
level++;
break;
case '}':
case RPAREN:
level--;
break;
default:
if (wasSpace && haveName) {
if (ISEQOPERATOR(*line)) {
/*
* We must have a finished word
*/
if (level != 0)
return FALSE;
/*
* When an = operator [+?!:] is found, the next
* character must be an = or it ain't a valid
* assignment.
*/
if (line[1] == '=')
return haveName;
#ifdef SUNSHCMD
/*
* This is a shell command
*/
if (strncmp(line, ":sh", 3) == 0)
return haveName;
#endif
}
/*
* This is the start of another word, so not assignment.
*/
return FALSE;
}
else {
haveName = TRUE;
wasSpace = FALSE;
}
break;
}
return haveName;
}
/*-
*---------------------------------------------------------------------
* Parse_DoVar --
* Take the variable assignment in the passed line and do it in the
* global context.
*
* Note: There is a lexical ambiguity with assignment modifier characters
* in variable names. This routine interprets the character before the =
* as a modifier. Therefore, an assignment like
* C++=/usr/bin/CC
* is interpreted as "C+ +=" instead of "C++ =".
*
* Input:
* line a line guaranteed to be a variable assignment.
* This reduces error checks
* ctxt Context in which to do the assignment
*
* Results:
* none
*
* Side Effects:
* the variable structure of the given variable name is altered in the
* global context.
*---------------------------------------------------------------------
*/
void
Parse_DoVar(char *line, GNode *ctxt)
{
char *cp; /* pointer into line */
enum {
VAR_SUBST, VAR_APPEND, VAR_SHELL, VAR_NORMAL
} type; /* Type of assignment */
char *opc; /* ptr to operator character to
* null-terminate the variable name */
Boolean freeCp = FALSE; /* TRUE if cp needs to be freed,
* i.e. if any variable expansion was
* performed */
/*
* Skip to variable name
*/
while ((*line == ' ') || (*line == '\t')) {
line++;
}
/*
* Skip to operator character, nulling out whitespace as we go
*/
for (cp = line + 1; *cp != '='; cp++) {
if (isspace ((unsigned char)*cp)) {
*cp = '\0';
}
}
opc = cp-1; /* operator is the previous character */
*cp++ = '\0'; /* nuke the = */
/*
* Check operator type
*/
switch (*opc) {
case '+':
type = VAR_APPEND;
*opc = '\0';
break;
case '?':
/*
* If the variable already has a value, we don't do anything.
*/
*opc = '\0';
if (Var_Exists(line, ctxt)) {
return;
} else {
type = VAR_NORMAL;
}
break;
case ':':
type = VAR_SUBST;
*opc = '\0';
break;
case '!':
type = VAR_SHELL;
*opc = '\0';
break;
default:
#ifdef SUNSHCMD
while (opc > line && *opc != ':')
opc--;
if (strncmp(opc, ":sh", 3) == 0) {
type = VAR_SHELL;
*opc = '\0';
break;
}
#endif
type = VAR_NORMAL;
break;
}
while (isspace ((unsigned char)*cp)) {
cp++;
}
if (type == VAR_APPEND) {
Var_Append(line, cp, ctxt);
} else if (type == VAR_SUBST) {
/*
* Allow variables in the old value to be undefined, but leave their
* invocation alone -- this is done by forcing oldVars to be false.
* XXX: This can cause recursive variables, but that's not hard to do,
* and this allows someone to do something like
*
* CFLAGS = $(.INCLUDES)
* CFLAGS := -I.. $(CFLAGS)
*
* And not get an error.
*/
Boolean oldOldVars = oldVars;
oldVars = FALSE;
/*
* make sure that we set the variable the first time to nothing
* so that it gets substituted!
*/
if (!Var_Exists(line, ctxt))
Var_Set(line, "", ctxt, 0);
cp = Var_Subst(NULL, cp, ctxt, FALSE);
oldVars = oldOldVars;
freeCp = TRUE;
Var_Set(line, cp, ctxt, 0);
} else if (type == VAR_SHELL) {
char *res;
const char *error;
if (strchr(cp, '$') != NULL) {
/*
* There's a dollar sign in the command, so perform variable
* expansion on the whole thing. The resulting string will need
* freeing when we're done, so set freeCmd to TRUE.
*/
cp = Var_Subst(NULL, cp, VAR_CMD, TRUE);
freeCp = TRUE;
}
res = Cmd_Exec(cp, &error);
Var_Set(line, res, ctxt, 0);
free(res);
if (error)
Parse_Error(PARSE_WARNING, error, cp);
} else {
/*
* Normal assignment -- just do it.
*/
Var_Set(line, cp, ctxt, 0);
}
if (strcmp(line, MAKEOVERRIDES) == 0)
Main_ExportMAKEFLAGS(FALSE); /* re-export MAKEFLAGS */
else if (strcmp(line, ".CURDIR") == 0) {
/*
* Somone is being (too?) clever...
* Let's pretend they know what they are doing and
* re-initialize the 'cur' Path.
*/
Dir_InitCur(cp);
Dir_SetPATH();
}
if (freeCp)
free(cp);
}
/*-
* ParseAddCmd --
* Lst_ForEach function to add a command line to all targets
*
* Input:
* gnp the node to which the command is to be added
* cmd the command to add
*
* Results:
* Always 0
*
* Side Effects:
* A new element is added to the commands list of the node.
*/
static int
ParseAddCmd(ClientData gnp, ClientData cmd)
{
GNode *gn = (GNode *)gnp;
/* Add to last (ie current) cohort for :: targets */
if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty (gn->cohorts))
gn = (GNode *)Lst_Datum(Lst_Last(gn->cohorts));
/* if target already supplied, ignore commands */
if (!(gn->type & OP_HAS_COMMANDS)) {
(void)Lst_AtEnd(gn->commands, cmd);
ParseMark(gn);
} else {
#ifdef notyet
/* XXX: We cannot do this until we fix the tree */
(void)Lst_AtEnd(gn->commands, cmd);
Parse_Error(PARSE_WARNING,
"overriding commands for target \"%s\"; "
"previous commands defined at %s: %d ignored",
gn->name, gn->fname, gn->lineno);
#else
Parse_Error(PARSE_WARNING,
"duplicate script for target \"%s\" ignored",
gn->name);
ParseErrorInternal(gn->fname, gn->lineno, PARSE_WARNING,
"using previous script for \"%s\" defined here",
gn->name);
#endif
}
return(0);
}
/*-
*-----------------------------------------------------------------------
* ParseHasCommands --
* Callback procedure for Parse_File when destroying the list of
* targets on the last dependency line. Marks a target as already
* having commands if it does, to keep from having shell commands
* on multiple dependency lines.
*
* Input:
* gnp Node to examine
*
* Results:
* None
*
* Side Effects:
* OP_HAS_COMMANDS may be set for the target.
*
*-----------------------------------------------------------------------
*/
static void
ParseHasCommands(ClientData gnp)
{
GNode *gn = (GNode *)gnp;
if (!Lst_IsEmpty(gn->commands)) {
gn->type |= OP_HAS_COMMANDS;
}
}
/*-
*-----------------------------------------------------------------------
* Parse_AddIncludeDir --
* Add a directory to the path searched for included makefiles
* bracketed by double-quotes. Used by functions in main.c
*
* Input:
* dir The name of the directory to add
*
* Results:
* None.
*
* Side Effects:
* The directory is appended to the list.
*
*-----------------------------------------------------------------------
*/
void
Parse_AddIncludeDir(char *dir)
{
(void)Dir_AddDir(parseIncPath, dir);
}
/*-
*---------------------------------------------------------------------
* ParseDoInclude --
* Push to another file.
*
* The input is the line minus the `.'. A file spec is a string
* enclosed in <> or "". The former is looked for only in sysIncPath.
* The latter in . and the directories specified by -I command line
* options
*
* Results:
* None
*
* Side Effects:
* A structure is added to the includes Lst and readProc, lineno,
* fname and curFILE are altered for the new file
*---------------------------------------------------------------------
*/
static void
Parse_include_file(char *file, Boolean isSystem, int silent)
{
char *fullname; /* full pathname of file */
int fd;
/*
* Now we know the file's name and its search path, we attempt to
* find the durn thing. A return of NULL indicates the file don't
* exist.
*/
fullname = NULL;
if (!isSystem) {
/*
* Include files contained in double-quotes are first searched for
* relative to the including file's location. We don't want to
* cd there, of course, so we just tack on the old file's
* leading path components and call Dir_FindFile to see if
* we can locate the beast.
*/
char *prefEnd, *Fname;
/* Make a temporary copy of this, to be safe. */
Fname = estrdup(curFile->fname);
prefEnd = strrchr(Fname, '/');
if (prefEnd != NULL) {
char *newName;
*prefEnd = '\0';
if (file[0] == '/')
newName = estrdup(file);
else
newName = str_concat(Fname, file, STR_ADDSLASH);
fullname = Dir_FindFile(newName, parseIncPath);
if (fullname == NULL) {
fullname = Dir_FindFile(newName, dirSearchPath);
}
free(newName);
*prefEnd = '/';
} else {
fullname = NULL;
}
free(Fname);
if (fullname == NULL) {
/*
* Makefile wasn't found in same directory as included makefile.
* Search for it first on the -I search path,
* then on the .PATH search path, if not found in a -I directory.
* XXX: Suffix specific?
*/
fullname = Dir_FindFile(file, parseIncPath);
if (fullname == NULL) {
fullname = Dir_FindFile(file, dirSearchPath);
}
}
}
/* Looking for a system file or file still not found */
if (fullname == NULL) {
/*
* Look for it on the system path
*/
fullname = Dir_FindFile(file,
Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath);
}
if (fullname == NULL) {
if (!silent)
Parse_Error(PARSE_FATAL, "Could not find %s", file);
return;
}
/* Actually open the file... */
fd = open(fullname, O_RDONLY);
if (fd == -1) {
if (!silent)
Parse_Error(PARSE_FATAL, "Cannot open %s", fullname);
return;
}
/* Start reading from this file next */
Parse_SetInput(fullname, 0, fd, NULL);
}
static void
ParseDoInclude(char *line)
{
char endc; /* the character which ends the file spec */
char *cp; /* current position in file spec */
int silent = (*line != 'i') ? 1 : 0;
char *file = &line[7 + silent];
/* Skip to delimiter character so we know where to look */
while (*file == ' ' || *file == '\t')
file++;
if (*file != '"' && *file != '<') {
Parse_Error(PARSE_FATAL,
".include filename must be delimited by '\"' or '<'");
return;
}
/*
* Set the search path on which to find the include file based on the
* characters which bracket its name. Angle-brackets imply it's
* a system Makefile while double-quotes imply it's a user makefile
*/
if (*file == '<') {
endc = '>';
} else {
endc = '"';
}
/* Skip to matching delimiter */
for (cp = ++file; *cp && *cp != endc; cp++)
continue;
if (*cp != endc) {
Parse_Error(PARSE_FATAL,
"Unclosed %cinclude filename. '%c' expected",
'.', endc);
return;
}
*cp = '\0';
/*
* Substitute for any variables in the file name before trying to
* find the thing.
*/
file = Var_Subst(NULL, file, VAR_CMD, FALSE);
Parse_include_file(file, endc == '>', silent);
free(file);
}
/*-
*---------------------------------------------------------------------
* ParseSetParseFile --
* Set the .PARSEDIR and .PARSEFILE variables to the dirname and
* basename of the given filename
*
* Results:
* None
*
* Side Effects:
* The .PARSEDIR and .PARSEFILE variables are overwritten by the
* dirname and basename of the given filename.
*---------------------------------------------------------------------
*/
static void
ParseSetParseFile(const char *filename)
{
char *slash;
char *dirname;
int len;
slash = strrchr(filename, '/');
if (slash == NULL) {
Var_Set(".PARSEDIR", ".", VAR_GLOBAL, 0);
Var_Set(".PARSEFILE", filename, VAR_GLOBAL, 0);
} else {
len = slash - filename;
dirname = emalloc(len + 1);
memcpy(dirname, filename, len);
dirname[len] = 0;
Var_Set(".PARSEDIR", dirname, VAR_GLOBAL, 0);
Var_Set(".PARSEFILE", slash+1, VAR_GLOBAL, 0);
free(dirname);
}
}
/*-
*---------------------------------------------------------------------
* Parse_setInput --
* Start Parsing from the given source
*
* Results:
* None
*
* Side Effects:
* A structure is added to the includes Lst and readProc, lineno,
* fname and curFile are altered for the new file
*---------------------------------------------------------------------
*/
void
Parse_SetInput(const char *name, int line, int fd, char *buf)
{
if (name == NULL)
name = curFile->fname;
if (DEBUG(PARSE))
fprintf(debug_file, "Parse_SetInput: file %s, line %d, fd %d, buf %p\n",
name, line, fd, buf);
if (fd == -1 && buf == NULL)
/* sanity */
return;
/* Save exiting file info */
Lst_AtFront(includes, curFile);
/* Allocate and fill in new structure */
curFile = emalloc(sizeof *curFile);
/*
* Once the previous state has been saved, we can get down to reading
* the new file. We set up the name of the file to be the absolute
* name of the include file so error messages refer to the right
* place.
*/
curFile->fname = name;
curFile->lineno = line;
curFile->fd = fd;
ParseSetParseFile(name);
if (buf == NULL) {
/*
* Allocate a 32k data buffer (as stdio seems to).
* Set pointers so that first ParseReadc has to do a file read.
*/
buf = emalloc(IFILE_BUFLEN);
buf[0] = 0;
curFile->P_str = buf;
curFile->P_ptr = buf;
curFile->P_end = buf;
curFile->P_buflen = IFILE_BUFLEN;
} else {
/* Start reading from the start of the buffer */
curFile->P_str = buf;
curFile->P_ptr = buf;
curFile->P_end = NULL;
}
}
#ifdef SYSVINCLUDE
/*-
*---------------------------------------------------------------------
* ParseTraditionalInclude --
* Push to another file.
*
* The input is the current line. The file name(s) are
* following the "include".
*
* Results:
* None
*
* Side Effects:
* A structure is added to the includes Lst and readProc, lineno,
* fname and curFILE are altered for the new file
*---------------------------------------------------------------------
*/
static void
ParseTraditionalInclude(char *line)
{
char *cp; /* current position in file spec */
int done = 0;
int silent = (line[0] != 'i') ? 1 : 0;
char *file = &line[silent + 7];
char *all_files;
if (DEBUG(PARSE)) {
fprintf(debug_file, "ParseTraditionalInclude: %s\n", file);
}
/*
* Skip over whitespace
*/
while (isspace((unsigned char)*file))
file++;
/*
* Substitute for any variables in the file name before trying to
* find the thing.
*/
all_files = Var_Subst(NULL, file, VAR_CMD, FALSE);
if (*file == '\0') {
Parse_Error(PARSE_FATAL,
"Filename missing from \"include\"");
return;
}
for (file = all_files; !done; file = cp + 1) {
/* Skip to end of line or next whitespace */
for (cp = file; *cp && !isspace((unsigned char) *cp); cp++)
continue;
if (*cp)
*cp = '\0';
else
done = 1;
Parse_include_file(file, FALSE, silent);
}
free(all_files);
}
#endif
/*-
*---------------------------------------------------------------------
* ParseEOF --
* Called when EOF is reached in the current file. If we were reading
* an include file, the includes stack is popped and things set up
* to go back to reading the previous file at the previous location.
*
* Results:
* CONTINUE if there's more to do. DONE if not.
*
* Side Effects:
* The old curFILE, is closed. The includes list is shortened.
* lineno, curFILE, and fname are changed if CONTINUE is returned.
*---------------------------------------------------------------------
*/
static int
ParseEOF(void)
{
/* Dispose of curFile info */
/* Leak curFile->fname because all the gnodes have pointers to it */
if (curFile->fd != -1)
close(curFile->fd);
free(curFile->P_str);
free(curFile);
curFile = Lst_DeQueue(includes);
if (curFile == NULL) {
/* We've run out of input */
Var_Delete(".PARSEDIR", VAR_GLOBAL);
Var_Delete(".PARSEFILE", VAR_GLOBAL);
return DONE;
}
if (DEBUG(PARSE))
fprintf(debug_file, "ParseEOF: returning to file %s, line %d, fd %d\n",
curFile->fname, curFile->lineno, curFile->fd);
/* Restore the PARSEDIR/PARSEFILE variables */
ParseSetParseFile(curFile->fname);
return (CONTINUE);
}
#define PARSE_RAW 1
#define PARSE_SKIP 2
static char *
ParseGetLine(int flags, int *length)
{
IFile *cf = curFile;
char *ptr;
char ch;
char *line;
char *line_end;
char *escaped;
char *comment;
char *tp;
int len, dist;
/* Loop through blank lines and comment lines */
for (;;) {
cf->lineno++;
line = cf->P_ptr;
ptr = line;
line_end = line;
escaped = NULL;
comment = NULL;
for (;;) {
ch = *ptr;
if (ch == 0 || (ch == '\\' && ptr[1] == 0)) {
if (cf->P_end == NULL)
/* End of string (aka for loop) data */
break;
/* End of data read from file, read more data */
if (ptr != cf->P_end && (ch != '\\' || ptr + 1 != cf->P_end)) {
Parse_Error(PARSE_FATAL, "Zero byte read from file");
return NULL;
}
/* Move existing data to (near) start of file buffer */
len = cf->P_end - cf->P_ptr;
tp = cf->P_str + 32;
memmove(tp, cf->P_ptr, len);
dist = cf->P_ptr - tp;
/* Update all pointers to reflect moved data */
ptr -= dist;
line -= dist;
line_end -= dist;
if (escaped)
escaped -= dist;
if (comment)
comment -= dist;
cf->P_ptr = tp;
tp += len;
cf->P_end = tp;
/* Try to read more data from file into buffer space */
len = cf->P_str + cf->P_buflen - tp - 32;
if (len <= 0) {
/* We need a bigger buffer to hold this line */
tp = erealloc(cf->P_str, cf->P_buflen + IFILE_BUFLEN);
cf->P_end = cf->P_end - cf->P_str + tp;
ptr = ptr - cf->P_str + tp;
line = line - cf->P_str + tp;
line_end = line_end - cf->P_str + tp;
if (escaped)
escaped = escaped - cf->P_str + tp;
if (comment)
comment = comment - cf->P_str + tp;
cf->P_str = tp;
tp = cf->P_end;
len += IFILE_BUFLEN;
}
len = read(cf->fd, tp, len);
if (len <= 0) {
if (len < 0) {
Parse_Error(PARSE_FATAL, "Makefile read error: %s",
strerror(errno));
return NULL;
}
/* End of file */
break;
}
/* 0 terminate the data, and update end pointer */
tp += len;
cf->P_end = tp;
*tp = 0;
/* Process newly read characters */
continue;
}
if (ch == '\\') {
/* Don't treat next character as special, remember first one */
if (escaped == NULL)
escaped = ptr;
if (ptr[1] == '\n')
cf->lineno++;
ptr += 2;
line_end = ptr;
continue;
}
if (ch == '#' && comment == NULL) {
/* Remember first '#' for comment stripping */
comment = line_end;
}
ptr++;
if (ch == '\n')
break;
if (!isspace((unsigned char)ch))
/* We are not interested in trailing whitespace */
line_end = ptr;
}
/* Save next 'to be processed' location */
cf->P_ptr = ptr;
/* Check we have a non-comment, non-blank line */
if (line_end == line || comment == line) {
if (ch == 0)
/* At end of file */
return NULL;
/* Parse another line */
continue;
}
/* We now have a line of data */
*line_end = 0;
if (flags & PARSE_RAW) {
/* Leave '\' (etc) in line buffer (eg 'for' lines) */
*length = line_end - line;
return line;
}
if (flags & PARSE_SKIP) {
/* Completely ignore non-directives */
if (line[0] != '.')
continue;
/* We could do more of the .else/.elif/.endif checks here */
}
break;
}
/* Brutally ignore anything after a non-escaped '#' in non-commands */
if (comment != NULL && line[0] != '\t') {
line_end = comment;
*line_end = 0;
}
/* If we didn't see a '\\' then the in-situ data is fine */
if (escaped == NULL) {
*length = line_end - line;
return line;
}
/* Remove escapes from '\n' and '#' */
tp = ptr = escaped;
escaped = line;
for (; ; *tp++ = ch) {
ch = *ptr++;
if (ch != '\\') {
if (ch == 0)
break;
continue;
}
ch = *ptr++;
if (ch == 0) {
/* Delete '\\' at end of buffer */
tp--;
break;
}
if (ch == '#' && line[0] != '\t')
/* Delete '\\' from before '#' on non-command lines */
continue;
if (ch != '\n') {
/* Leave '\\' in buffer for later */
*tp++ = '\\';
/* Make sure we don't delete an escaped ' ' from the line end */
escaped = tp + 1;
continue;
}
/* Escaped '\n' replace following whitespace with a single ' ' */
while (ptr[0] == ' ' || ptr[0] == '\t')
ptr++;
ch = ' ';
}
/* Delete any trailing spaces - eg from empty continuations */
while (tp > escaped && isspace((unsigned char)tp[-1]))
tp--;
*tp = 0;
*length = tp - line;
return line;
}
/*-
*---------------------------------------------------------------------
* ParseReadLine --
* Read an entire line from the input file. Called only by Parse_File.
* To facilitate escaped newlines and what have you, a character is
* buffered in 'lastc', which is '\0' when no characters have been
* read. When we break out of the loop, c holds the terminating
* character and lastc holds a character that should be added to
* the line (unless we don't read anything but a terminator).
*
* Results:
* A line w/o its newline
*
* Side Effects:
* Only those associated with reading a character
*---------------------------------------------------------------------
*/
static char *
ParseReadLine(void)
{
char *line; /* Result */
int lineLength; /* Length of result */
int lineno; /* Saved line # */
for (;;) {
line = ParseGetLine(0, &lineLength);
if (line == NULL)
return NULL;
if (line[0] != '.')
return line;
/*
* The line might be a conditional. Ask the conditional module
* about it and act accordingly
*/
switch (Cond_Eval(line)) {
case COND_SKIP:
/* Skip to next conditional that evaluates to COND_PARSE. */
do {
line = ParseGetLine(PARSE_SKIP, &lineLength);
} while (line && Cond_Eval(line) != COND_PARSE);
if (line == NULL)
break;
continue;
case COND_PARSE:
continue;
case COND_INVALID: /* Not a conditional line */
if (!For_Eval(line))
break;
lineno = curFile->lineno;
/* Skip after the matching end */
do {
line = ParseGetLine(PARSE_RAW, &lineLength);
if (line == NULL) {
Parse_Error(PARSE_FATAL,
"Unexpected end of file in for loop.\n");
break;
}
} while (For_Eval(line));
/* Stash each iteration as a new 'input file' */
For_Run(lineno);
/* Read next line from for-loop buffer */
continue;
}
return (line);
}
}
/*-
*-----------------------------------------------------------------------
* ParseFinishLine --
* Handle the end of a dependency group.
*
* Results:
* Nothing.
*
* Side Effects:
* inLine set FALSE. 'targets' list destroyed.
*
*-----------------------------------------------------------------------
*/
static void
ParseFinishLine(void)
{
if (inLine) {
Lst_ForEach(targets, Suff_EndTransform, NULL);
Lst_Destroy(targets, ParseHasCommands);
targets = NULL;
inLine = FALSE;
}
}
/*-
*---------------------------------------------------------------------
* Parse_File --
* Parse a file into its component parts, incorporating it into the
* current dependency graph. This is the main function and controls
* almost every other function in this module
*
* Input:
* name the name of the file being read
* fd Open file to makefile to parse
*
* Results:
* None
*
* Side Effects:
* closes fd.
* Loads. Nodes are added to the list of all targets, nodes and links
* are added to the dependency graph. etc. etc. etc.
*---------------------------------------------------------------------
*/
void
Parse_File(const char *name, int fd)
{
char *cp; /* pointer into the line */
char *line; /* the line we're working on */
inLine = FALSE;
fatals = 0;
Parse_SetInput(name, 0, fd, NULL);
do {
for (; (line = ParseReadLine()) != NULL; ) {
if (DEBUG(PARSE))
fprintf(debug_file, "ParseReadLine (%d): '%s'\n",
curFile->lineno, line);
if (*line == '.') {
/*
* Lines that begin with the special character are either
* include or undef directives.
*/
for (cp = line + 1; isspace((unsigned char)*cp); cp++) {
continue;
}
if (strncmp(cp, "include", 7) == 0 ||
((cp[0] == 's' || cp[0] == '-') &&
strncmp(&cp[1], "include", 7) == 0)) {
ParseDoInclude(cp);
continue;
}
if (strncmp(cp, "undef", 5) == 0) {
char *cp2;
for (cp += 5; isspace((unsigned char) *cp); cp++)
continue;
for (cp2 = cp; !isspace((unsigned char) *cp2) &&
(*cp2 != '\0'); cp2++)
continue;
*cp2 = '\0';
Var_Delete(cp, VAR_GLOBAL);
continue;
}
}
if (*line == '\t') {
/*
* If a line starts with a tab, it can only hope to be
* a creation command.
*/
shellCommand:
for (cp = line + 1; isspace ((unsigned char)*cp); cp++) {
continue;
}
if (*cp) {
if (!inLine)
Parse_Error(PARSE_FATAL,
"Unassociated shell command \"%s\"",
cp);
/*
* So long as it's not a blank line and we're actually
* in a dependency spec, add the command to the list of
* commands of all targets in the dependency spec
*/
if (targets) {
cp = estrdup(cp);
Lst_ForEach(targets, ParseAddCmd, cp);
#ifdef CLEANUP
Lst_AtEnd(targCmds, cp);
#endif
}
}
continue;
}
#ifdef SYSVINCLUDE
if (((strncmp(line, "include", 7) == 0 &&
isspace((unsigned char) line[7])) ||
((line[0] == 's' || line[0] == '-') &&
strncmp(&line[1], "include", 7) == 0 &&
isspace((unsigned char) line[8]))) &&
strchr(line, ':') == NULL) {
/*
* It's an S3/S5-style "include".
*/
ParseTraditionalInclude(line);
continue;
}
#endif
if (Parse_IsVar(line)) {
ParseFinishLine();
Parse_DoVar(line, VAR_GLOBAL);
continue;
}
#ifndef POSIX
/*
* To make life easier on novices, if the line is indented we
* first make sure the line has a dependency operator in it.
* If it doesn't have an operator and we're in a dependency
* line's script, we assume it's actually a shell command
* and add it to the current list of targets.
*/
cp = line;
if (isspace((unsigned char) line[0])) {
while ((*cp != '\0') && isspace((unsigned char) *cp))
cp++;
while (*cp && (ParseIsEscaped(line, cp) ||
(*cp != ':') && (*cp != '!'))) {
cp++;
}
if (*cp == '\0') {
if (inLine) {
Parse_Error(PARSE_WARNING,
"Shell command needs a leading tab");
goto shellCommand;
}
}
}
#endif
ParseFinishLine();
/*
* For some reason - probably to make the parser impossible -
* a ';' can be used to separate commands from dependencies.
* No attempt is made to avoid ';' inside substitution patterns.
*/
for (cp = line; *cp != 0; cp++) {
if (*cp == '\\' && cp[1] != 0) {
cp++;
continue;
}
if (*cp == ';')
break;
}
if (*cp != 0)
/* Terminate the dependency list at the ';' */
*cp = 0;
else
cp = NULL;
/*
* We now know it's a dependency line so it needs to have all
* variables expanded before being parsed. Tell the variable
* module to complain if some variable is undefined...
*/
line = Var_Subst(NULL, line, VAR_CMD, TRUE);
/*
* Need a non-circular list for the target nodes
*/
if (targets)
Lst_Destroy(targets, NOFREE);
targets = Lst_Init(FALSE);
inLine = TRUE;
ParseDoDependency(line);
free(line);
/* If there were commands after a ';', add them now */
if (cp != NULL) {
line = cp + 1;
goto shellCommand;
}
}
/*
* Reached EOF, but it may be just EOF of an include file...
*/
} while (ParseEOF() == CONTINUE);
/*
* Make sure conditionals are clean
*/
Cond_End();
if (fatals) {
(void)fprintf(stderr,
"%s: Fatal errors encountered -- cannot continue\n",
progname);
PrintOnError(NULL);
exit(1);
}
}
/*-
*---------------------------------------------------------------------
* Parse_Init --
* initialize the parsing module
*
* Results:
* none
*
* Side Effects:
* the parseIncPath list is initialized...
*---------------------------------------------------------------------
*/
void
Parse_Init(void)
{
mainNode = NILGNODE;
parseIncPath = Lst_Init(FALSE);
sysIncPath = Lst_Init(FALSE);
defIncPath = Lst_Init(FALSE);
includes = Lst_Init(FALSE);
#ifdef CLEANUP
targCmds = Lst_Init(FALSE);
#endif
}
void
Parse_End(void)
{
#ifdef CLEANUP
Lst_Destroy(targCmds, (FreeProc *)free);
if (targets)
Lst_Destroy(targets, NOFREE);
Lst_Destroy(defIncPath, Dir_Destroy);
Lst_Destroy(sysIncPath, Dir_Destroy);
Lst_Destroy(parseIncPath, Dir_Destroy);
Lst_Destroy(includes, NOFREE); /* Should be empty now */
#endif
}
/*-
*-----------------------------------------------------------------------
* Parse_MainName --
* Return a Lst of the main target to create for main()'s sake. If
* no such target exists, we Punt with an obnoxious error message.
*
* Results:
* A Lst of the single node to create.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
Lst
Parse_MainName(void)
{
Lst mainList; /* result list */
mainList = Lst_Init(FALSE);
if (mainNode == NILGNODE) {
Punt("no target to make.");
/*NOTREACHED*/
} else if (mainNode->type & OP_DOUBLEDEP) {
(void)Lst_AtEnd(mainList, mainNode);
Lst_Concat(mainList, mainNode->cohorts, LST_CONCNEW);
}
else
(void)Lst_AtEnd(mainList, mainNode);
Var_Append(".TARGETS", mainNode->name, VAR_GLOBAL);
return (mainList);
}
/*-
*-----------------------------------------------------------------------
* ParseMark --
* Add the filename and lineno to the GNode so that we remember
* where it was first defined.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static void
ParseMark(GNode *gn)
{
gn->fname = curFile->fname;
gn->lineno = curFile->lineno;
}
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