/*- * Copyright (c) 1988, 1989, 1990, 1993 * The Regents of the University of California. All rights reserved. * 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. * * @(#)parse.c 8.3 (Berkeley) 3/19/94 */ #include __FBSDID("$FreeBSD$"); /*- * parse.c -- * Functions to parse a makefile. * * 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. * * Interface: * * 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 #include #include #include #include #include #include "arch.h" #include "buf.h" #include "cond.h" #include "config.h" #include "dir.h" #include "for.h" #include "globals.h" #include "GNode.h" #include "hash_tables.h" #include "job.h" #include "make.h" #include "nonints.h" #include "parse.h" #include "pathnames.h" #include "str.h" #include "suff.h" #include "targ.h" #include "util.h" #include "var.h" /* * These values are returned by ParsePopInput 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 /* targets we're working on */ static Lst targets = Lst_Initializer(targets); /* true if currently in a dependency line or its commands */ static Boolean inLine; static int fatals = 0; /* * The main target to create. This is the first target on the * first dependency line in the first makefile. */ static GNode *mainNode; /* * Definitions for handling #include specifications */ struct IFile { char *fname; /* name of previous file */ int lineno; /* saved line number */ FILE *F; /* the open stream */ char *str; /* the string when parsing a string */ char *ptr; /* the current pointer when parsing a string */ TAILQ_ENTRY(IFile) link;/* stack the files */ }; /* stack of IFiles generated by * #includes */ static TAILQ_HEAD(, IFile) includes = TAILQ_HEAD_INITIALIZER(includes); /* access current file */ #define CURFILE (TAILQ_FIRST(&includes)) /* list of directories for "..." includes */ struct Path parseIncPath = TAILQ_HEAD_INITIALIZER(parseIncPath); /* list of directories for <...> includes */ struct Path sysIncPath = TAILQ_HEAD_INITIALIZER(sysIncPath); /* * 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 */ ExportVar, /* .EXPORTVAR */ Ignore, /* .IGNORE */ Includes, /* .INCLUDES */ Interrupt, /* .INTERRUPT */ Libs, /* .LIBS */ MFlags, /* .MFLAGS or .MAKEFLAGS */ Main, /* .MAIN and we don't have anyth. user-spec. to make */ Not, /* Not special */ NotParallel, /* .NOTPARALELL */ Null, /* .NULL */ Order, /* .ORDER */ Parallel, /* .PARALLEL */ ExPath, /* .PATH */ Phony, /* .PHONY */ Posix, /* .POSIX */ Precious, /* .PRECIOUS */ ExShell, /* .SHELL */ Silent, /* .SILENT */ SingleShell, /* .SINGLESHELL */ Suffixes, /* .SUFFIXES */ Wait, /* .WAIT */ Warn, /* .WARN */ Attribute /* Generic attribute */ } ParseSpecial; static ParseSpecial specType; static int waiting; /* * Predecessor node for handling .ORDER. Initialized to NULL 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 const struct keyword { const char *name; /* Name of keyword */ ParseSpecial spec; /* Type when used as a target */ int op; /* Operator when used as a source */ } parseKeywords[] = { /* KEYWORD-START-TAG */ { ".BEGIN", Begin, 0 }, { ".DEFAULT", Default, 0 }, { ".END", End, 0 }, { ".EXEC", Attribute, OP_EXEC }, { ".EXPORTVAR", ExportVar, 0 }, { ".IGNORE", Ignore, OP_IGNORE }, { ".INCLUDES", Includes, 0 }, { ".INTERRUPT", Interrupt, 0 }, { ".INVISIBLE", Attribute, OP_INVISIBLE }, { ".JOIN", Attribute, OP_JOIN }, { ".LIBS", Libs, 0 }, { ".MAIN", Main, 0 }, { ".MAKE", Attribute, OP_MAKE }, { ".MAKEFLAGS", MFlags, 0 }, { ".MFLAGS", MFlags, 0 }, { ".NOTMAIN", Attribute, OP_NOTMAIN }, { ".NOTPARALLEL", NotParallel, 0 }, { ".NO_PARALLEL", NotParallel, 0 }, { ".NULL", Null, 0 }, { ".OPTIONAL", Attribute, OP_OPTIONAL }, { ".ORDER", Order, 0 }, { ".PARALLEL", Parallel, 0 }, { ".PATH", ExPath, 0 }, { ".PHONY", Phony, OP_PHONY }, { ".POSIX", Posix, 0 }, { ".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 }, { ".WAIT", Wait, 0 }, { ".WARN", Warn, 0 }, /* KEYWORD-END-TAG */ }; #define NKEYWORDS (sizeof(parseKeywords) / sizeof(parseKeywords[0])) static void parse_include(char *, int, int); static void parse_message(char *, int, int); static void parse_undef(char *, int, int); static void parse_for(char *, int, int); static void parse_endfor(char *, int, int); static const struct directive { const char *name; int code; Boolean skip_flag; /* execute even when skipped */ void (*func)(char *, int, int); } directives[] = { /* DIRECTIVES-START-TAG */ { "elif", COND_ELIF, TRUE, Cond_If }, { "elifdef", COND_ELIFDEF, TRUE, Cond_If }, { "elifmake", COND_ELIFMAKE, TRUE, Cond_If }, { "elifndef", COND_ELIFNDEF, TRUE, Cond_If }, { "elifnmake", COND_ELIFNMAKE, TRUE, Cond_If }, { "else", COND_ELSE, TRUE, Cond_Else }, { "endfor", 0, FALSE, parse_endfor }, { "endif", COND_ENDIF, TRUE, Cond_Endif }, { "error", 1, FALSE, parse_message }, { "for", 0, FALSE, parse_for }, { "if", COND_IF, TRUE, Cond_If }, { "ifdef", COND_IFDEF, TRUE, Cond_If }, { "ifmake", COND_IFMAKE, TRUE, Cond_If }, { "ifndef", COND_IFNDEF, TRUE, Cond_If }, { "ifnmake", COND_IFNMAKE, TRUE, Cond_If }, { "include", 0, FALSE, parse_include }, { "undef", 0, FALSE, parse_undef }, { "warning", 0, FALSE, parse_message }, /* DIRECTIVES-END-TAG */ }; #define NDIRECTS (sizeof(directives) / sizeof(directives[0])) /*- * ParseFindKeyword * Look in the table of keywords for one matching the given string. * * Results: * The pointer to keyword table entry or NULL. */ static const struct keyword * ParseFindKeyword(const char *str) { int kw; kw = keyword_hash(str, strlen(str)); if (kw < 0 || kw >= (int)NKEYWORDS || strcmp(str, parseKeywords[kw].name) != 0) return (NULL); return (&parseKeywords[kw]); } /*- * Parse_Error -- * 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 */ void Parse_Error(int type, const char *fmt, ...) { va_list ap; va_start(ap, fmt); if (CURFILE != NULL) fprintf(stderr, "\"%s\", line %d: ", CURFILE->fname, CURFILE->lineno); if (type == PARSE_WARNING) fprintf(stderr, "warning: "); vfprintf(stderr, fmt, ap); va_end(ap); fprintf(stderr, "\n"); fflush(stderr); if (type == PARSE_FATAL) fatals += 1; } /** * ParsePushInput * * Push a new input source onto the input stack. If ptr is NULL * the fullname is used to fopen the file. If it is not NULL, * ptr is assumed to point to the string to be parsed. If opening the * file fails, the fullname is freed. */ static void ParsePushInput(char *fullname, FILE *fp, char *ptr, int lineno) { struct IFile *nf; nf = emalloc(sizeof(*nf)); nf->fname = fullname; nf->lineno = lineno; if (ptr == NULL) { /* the input source is a file */ if ((nf->F = fp) == NULL) { nf->F = fopen(fullname, "r"); if (nf->F == NULL) { Parse_Error(PARSE_FATAL, "Cannot open %s", fullname); free(fullname); free(nf); return; } } nf->str = nf->ptr = NULL; Var_Append(".MAKEFILE_LIST", fullname, VAR_GLOBAL); } else { nf->str = nf->ptr = ptr; nf->F = NULL; } TAILQ_INSERT_HEAD(&includes, nf, link); } /** * ParsePopInput * 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.F is closed. The includes list is shortened. * curFile.lineno, curFile.F, and curFile.fname are changed if * CONTINUE is returned. */ static int ParsePopInput(void) { struct IFile *ifile; /* the state on the top of the includes stack */ assert(!TAILQ_EMPTY(&includes)); ifile = TAILQ_FIRST(&includes); TAILQ_REMOVE(&includes, ifile, link); free(ifile->fname); if (ifile->F != NULL) { fclose(ifile->F); Var_Append(".MAKEFILE_LIST", "..", VAR_GLOBAL); } if (ifile->str != NULL) { free(ifile->str); } free(ifile); return (TAILQ_EMPTY(&includes) ? DONE : CONTINUE); } /** * parse_warn * Parse the .WARN pseudo-target. */ static void parse_warn(char *line) { char **argv; int argc; int i; argv = brk_string(line, &argc, TRUE); for (i = 1; i < argc; i++) Main_ParseWarn(argv[i], 0); } /*- *--------------------------------------------------------------------- * ParseLinkSrc -- * Link the parent nodes to their new child. Used by * ParseDoDependency. If the specType isn't 'Not', the parent * isn't linked as a parent of the child. * * Side Effects: * New elements are added to the parents lists of cgn and the * children list of cgn. the unmade field of pgn is updated * to reflect the additional child. *--------------------------------------------------------------------- */ static void ParseLinkSrc(Lst *parents, GNode *cgn) { LstNode *ln; GNode *pgn; LST_FOREACH(ln, parents) { pgn = Lst_Datum(ln); if (Lst_Member(&pgn->children, cgn) == NULL) { Lst_AtEnd(&pgn->children, cgn); if (specType == Not) { Lst_AtEnd(&cgn->parents, pgn); } pgn->unmade += 1; } } } /*- *--------------------------------------------------------------------- * ParseDoOp -- * Apply the parsed operator to all target nodes. Used in * ParseDoDependency once all targets have been found and their * operator parsed. If the previous and new operators are incompatible, * a major error is taken. * * Side Effects: * The type field of the node is altered to reflect any new bits in * the op. *--------------------------------------------------------------------- */ static void ParseDoOp(int op) { GNode *cohort; LstNode *ln; GNode *gn; LST_FOREACH(ln, &targets) { gn = Lst_Datum(ln); /* * 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; } 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. */ cohort = Targ_NewGN(gn->name); /* * Duplicate links to parents so graph traversal is * simple. Perhaps some type bits should be duplicated? * * 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. */ ParseLinkSrc(&gn->parents, cohort); cohort->type = OP_DOUBLEDEP|OP_INVISIBLE; Lst_AtEnd(&gn->cohorts, cohort); /* * Replace the node in the targets list with the * new copy */ Lst_Replace(ln, cohort); gn = cohort; } /* * 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; } } /*- *--------------------------------------------------------------------- * 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' * * 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, char *src, Lst *allsrc) { GNode *gn = NULL; const struct keyword *kw; if (src[0] == '.' && isupper ((unsigned char)src[1])) { if ((kw = ParseFindKeyword(src)) != NULL) { if (kw->op != 0) { ParseDoOp(kw->op); return; } if (kw->spec == Wait) { waiting++; 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... */ 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 != NULL) { Lst_AtEnd(&predecessor->successors, gn); Lst_AtEnd(&gn->preds, predecessor); } /* * 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. */ gn = Targ_FindNode(src, TARG_CREATE); if (tOp) { gn->type |= tOp; } else { ParseLinkSrc(&targets, gn); } if ((gn->type & OP_OPMASK) == OP_DOUBLEDEP) { GNode *cohort; LstNode *ln; for (ln = Lst_First(&gn->cohorts); ln != NULL; ln = Lst_Succ(ln)) { cohort = Lst_Datum(ln); if (tOp) { cohort->type |= tOp; } else { ParseLinkSrc(&targets, cohort); } } } break; } gn->order = waiting; Lst_AtEnd(allsrc, gn); if (waiting) { LstNode *ln; GNode *p; /* * Check if GNodes needs to be synchronized. * This has to be when two nodes are on different sides of a * .WAIT directive. */ LST_FOREACH(ln, allsrc) { p = Lst_Datum(ln); if (p->order >= gn->order) break; /* * XXX: This can cause loops, and loops can cause * unmade targets, but checking is tedious, and the * debugging output can show the problem */ Lst_AtEnd(&p->successors, gn); Lst_AtEnd(&gn->preds, p); } } } /*- *--------------------------------------------------------------------- * ParseDoDependency -- * Parse the dependency line in line. * * 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; /* a general purpose temporary node */ int op; /* the operator on the line */ char savec; /* a place to save a character */ Lst paths; /* Search paths to alter when parsing .PATH targets */ int tOp; /* operator from special target */ LstNode *ln; const struct keyword *kw; tOp = 0; specType = Not; waiting = 0; Lst_Init(&paths); do { for (cp = line; *cp && !isspace((unsigned char)*cp) && *cp != '('; 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. */ size_t length = 0; Boolean freeIt; char *result; result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); if (freeIt) { free(result); } cp += length - 1; } else if (*cp == '!' || *cp == ':') { /* * We don't want to end a word on ':' or '!' if * there is a better match later on in the * string (greedy matching). * This allows the user to have targets like: * fie::fi:fo: fum * foo::bar: * where "fie::fi:fo" and "foo::bar" are the * targets. In real life this is used for perl5 * library man pages where "::" separates an * object from its class. Ie: * "File::Spec::Unix". This behaviour is also * consistent with other versions of make. */ char *p = cp + 1; if (*cp == ':' && *p == ':') p++; /* Found the best match already. */ if (*p == '\0' || isspace(*p)) break; p += strcspn(p, "!:"); /* No better match later on... */ if (*p == '\0') break; } continue; } if (*cp == '(') { /* * 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); return; } else { cp = line; 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"); return; } *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. */ if ((kw = ParseFindKeyword(line)) != NULL) { if (specType == ExPath && kw->spec != ExPath) { Parse_Error(PARSE_FATAL, "Mismatched special targets"); return; } specType = kw->spec; tOp = kw->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 * .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 NULL */ switch (specType) { case ExPath: 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; Lst_AtEnd(&targets, gn); break; case Default: gn = Targ_NewGN(".DEFAULT"); gn->type |= (OP_NOTMAIN|OP_TRANSFORM); Lst_AtEnd(&targets, gn); DEFAULT = gn; break; case NotParallel: maxJobs = 1; break; case SingleShell: compatMake = 1; break; case Order: predecessor = NULL; break; default: break; } } else if (strncmp(line, ".PATH", 5) == 0) { /* * .PATH has to be handled specially. * Call on the suffix module to give us a path * to modify. */ struct Path *path; specType = ExPath; path = Suff_GetPath(&line[5]); if (path == NULL) { Parse_Error(PARSE_FATAL, "Suffix '%s' " "not defined (yet)", &line[5]); return; } else 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') { /* target names to be found and added to targets list */ Lst curTargs = Lst_Initializer(curTargs); 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 Path_Clear in the * destruction of the path as the Dir module * could have added a directory to the path... */ struct Path emptyPath = TAILQ_HEAD_INITIALIZER(emptyPath); Path_Expand(line, &emptyPath, &curTargs); Path_Clear(&emptyPath); } else { /* * No wildcards, but we want to avoid code * duplication, so create a list with the word * on it. */ Lst_AtEnd(&curTargs, line); } while (!Lst_IsEmpty(&curTargs)) { char *targName = Lst_DeQueue(&curTargs); if (!Suff_IsTransform (targName)) { gn = Targ_FindNode(targName, TARG_CREATE); } else { gn = Suff_AddTransform(targName); } 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 warnFlag = FALSE; while (*cp != '!' && *cp != ':' && *cp) { if (*cp != ' ' && *cp != '\t') { warnFlag = TRUE; } cp++; } if (warnFlag) { Parse_Error(PARSE_WARNING, "Extra target ignored"); } } else { while (*cp && isspace((unsigned char)*cp)) { cp++; } } line = cp; } while (*line != '!' && *line != ':' && *line); 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"); return; } cp++; /* Advance beyond operator */ 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(ln, &paths) Path_Clear(Lst_Datum(ln)); break; case Posix: Var_Set("%POSIX", "1003.2", VAR_GLOBAL); break; 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, 0); *line = '\0'; } else if (specType == Warn) { parse_warn(line); *line = '\0'; } else if (specType == ExShell) { if (Job_ParseShell(line) != SUCCESS) { Parse_Error(PARSE_FATAL, "improper shell specification"); return; } *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) { 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. */ char savech; while (*cp && !isspace((unsigned char)*cp)) { cp++; } savech = *cp; *cp = '\0'; switch (specType) { case Suffixes: Suff_AddSuffix(line); break; case ExPath: LST_FOREACH(ln, &paths) Path_AddDir(Lst_Datum(ln), line); break; case Includes: Suff_AddInclude(line); break; case Libs: Suff_AddLib(line); break; case Null: Suff_SetNull(line); break; default: break; } *cp = savech; if (savech != '\0') { cp++; } while (*cp && isspace((unsigned char)*cp)) { cp++; } line = cp; } Lst_Destroy(&paths, NOFREE); } else if (specType == ExportVar) { Var_SetEnv(line, VAR_GLOBAL); } else { /* list of sources in order */ Lst curSrcs = Lst_Initializer(curSrc); 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. */ while (*cp && !isspace((unsigned char)*cp)) { if (*cp == '(' && 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; } else { cp++; } } if (*cp == '(') { GNode *gnp; /* list of archive source names after exp. */ Lst sources = Lst_Initializer(sources); if (Arch_ParseArchive(&line, &sources, VAR_CMD) != SUCCESS) { Parse_Error(PARSE_FATAL, "Error in " "source archive spec \"%s\"", line); return; } while (!Lst_IsEmpty(&sources)) { gnp = Lst_DeQueue(&sources); ParseDoSrc(tOp, gnp->name, &curSrcs); } cp = line; } else { if (*cp) { *cp = '\0'; cp += 1; } ParseDoSrc(tOp, line, &curSrcs); } while (*cp && isspace((unsigned char)*cp)) { cp++; } line = cp; } Lst_Destroy(&curSrcs, NOFREE); } if (mainNode == NULL) { /* * 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(ln, &targets) { gn = Lst_Datum(ln); if ((gn->type & (OP_NOTMAIN | OP_USE | OP_EXEC | OP_TRANSFORM)) == 0) { mainNode = gn; Targ_SetMain(gn); break; } } } } /*- *--------------------------------------------------------------------- * 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. * * 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 '(': case '{': level++; break; case '}': case ')': 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++ =". * * 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 */ /* * Avoid clobbered variable warnings by forcing the compiler * to ``unregister'' variables */ #if __GNUC__ (void)&cp; (void)&line; #endif /* * 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 != ':') { if (opc == line) break; else --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.. $(CFLAGS) * * And not get an error. */ Boolean oldOldVars = oldVars; oldVars = FALSE; /* * make sure that we set the variable the first time to nothing * so that it gets substituted! */ if (!Var_Exists(line, ctxt)) Var_Set(line, "", ctxt); cp = Buf_Peel(Var_Subst(cp, ctxt, FALSE)); oldVars = oldOldVars; Var_Set(line, cp, ctxt); free(cp); } else if (type == VAR_SHELL) { /* * TRUE if the command needs to be freed, i.e. * if any variable expansion was performed */ Boolean freeCmd = FALSE; Buffer *buf; const char *error; if (strchr(cp, '$') != 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 = Buf_Peel(Var_Subst(cp, VAR_CMD, TRUE)); freeCmd = TRUE; } buf = Cmd_Exec(cp, &error); Var_Set(line, Buf_Data(buf), ctxt); Buf_Destroy(buf, TRUE); if (error) Parse_Error(PARSE_WARNING, error, cp); if (freeCmd) free(cp); } else { /* * Normal assignment -- just do it. */ Var_Set(line, cp, ctxt); } } /*- *----------------------------------------------------------------------- * 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. * * Results: * None * * Side Effects: * OP_HAS_COMMANDS may be set for the target. * *----------------------------------------------------------------------- */ static void ParseHasCommands(void *gnp) { GNode *gn = 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 * * Results: * None. * * Side Effects: * The directory is appended to the list. * *----------------------------------------------------------------------- */ void Parse_AddIncludeDir(char *dir) { Path_AddDir(&parseIncPath, dir); } /*- *--------------------------------------------------------------------- * Parse_FromString -- * Start Parsing from the given string * * Results: * None * * Side Effects: * A structure is added to the includes Lst and readProc, curFile.lineno, * curFile.fname and curFile.F are altered for the new file *--------------------------------------------------------------------- */ void Parse_FromString(char *str, int lineno) { DEBUGF(FOR, ("%s\n---- at line %d\n", str, lineno)); ParsePushInput(estrdup(CURFILE->fname), NULL, str, lineno); } #ifdef SYSVINCLUDE /*- *--------------------------------------------------------------------- * ParseTraditionalInclude -- * Push to another file. * * The input is the line minus the "include". The file name is * the string following the "include". * * Results: * None * * Side Effects: * A structure is added to the includes Lst and readProc, curFile.lineno, * curFile.fname and curFile.F are altered for the new file *--------------------------------------------------------------------- */ static void ParseTraditionalInclude(char *file) { char *fullname; /* full pathname of file */ char *cp; /* current position in file spec */ /* * Skip over whitespace */ while (*file == ' ' || *file == '\t') { file++; } if (*file == '\0') { Parse_Error(PARSE_FATAL, "Filename missing from \"include\""); return; } /* * Skip to end of line or next whitespace */ for (cp = file; *cp && *cp != '\n' && *cp != '\t' && *cp != ' '; cp++) { continue; } *cp = '\0'; /* * Substitute for any variables in the file name before trying to * find the thing. */ file = Buf_Peel(Var_Subst(file, VAR_CMD, FALSE)); /* * Now we know the file's name, we attempt to find the durn thing. * Search for it first on the -I search path, then on the .PATH * search path, if not found in a -I directory. */ fullname = Path_FindFile(file, &parseIncPath); if (fullname == NULL) { fullname = Path_FindFile(file, &dirSearchPath); } if (fullname == NULL) { /* * Still haven't found the makefile. Look for it on the system * path as a last resort. */ fullname = Path_FindFile(file, &sysIncPath); } if (fullname == NULL) { Parse_Error(PARSE_FATAL, "Could not find %s", file); /* XXXHB free(file) */ return; } /* XXXHB free(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. */ ParsePushInput(fullname, NULL, NULL, 0); } #endif /*- *--------------------------------------------------------------------- * ParseReadc -- * Read a character from the current file * * Results: * The character that was read * * Side Effects: *--------------------------------------------------------------------- */ static int ParseReadc(void) { if (CURFILE->F != NULL) return (fgetc(CURFILE->F)); if (CURFILE->str != NULL && *CURFILE->ptr != '\0') return (*CURFILE->ptr++); return (EOF); } /*- *--------------------------------------------------------------------- * ParseUnreadc -- * Put back a character to the current file * * Results: * None. * * Side Effects: *--------------------------------------------------------------------- */ static void ParseUnreadc(int c) { if (CURFILE->F != NULL) { ungetc(c, CURFILE->F); return; } if (CURFILE->str != NULL) { *--(CURFILE->ptr) = c; return; } } /* ParseSkipLine(): * Grab the next line unless it begins with a dot (`.') and we're told to * ignore such lines. */ static char * ParseSkipLine(int skip, int keep_newline) { char *line; int c, lastc; Buffer *buf; buf = Buf_Init(MAKE_BSIZE); do { Buf_Clear(buf); lastc = '\0'; while (((c = ParseReadc()) != '\n' || lastc == '\\') && c != EOF) { if (skip && c == '#' && lastc != '\\') { /* * let a comment be terminated even by an * escaped \n. This is consistent to comment * handling in ParseReadLine */ while ((c = ParseReadc()) != '\n' && c != EOF) ; break; } if (c == '\n') { if (keep_newline) Buf_AddByte(buf, (Byte)c); else Buf_ReplaceLastByte(buf, (Byte)' '); CURFILE->lineno++; while ((c = ParseReadc()) == ' ' || c == '\t') continue; if (c == EOF) break; } Buf_AddByte(buf, (Byte)c); lastc = c; } if (c == EOF) { Parse_Error(PARSE_FATAL, "Unclosed conditional/for loop"); Buf_Destroy(buf, TRUE); return (NULL); } CURFILE->lineno++; Buf_AddByte(buf, (Byte)'\0'); line = Buf_Data(buf); } while (skip == 1 && line[0] != '.'); Buf_Destroy(buf, FALSE); 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) { Buffer *buf; /* Buffer for current line */ int c; /* the current character */ int lastc; /* The most-recent character */ Boolean semiNL; /* treat semi-colons as newlines */ Boolean ignDepOp; /* TRUE if should ignore dependency operators * for the purposes of setting semiNL */ Boolean ignComment; /* TRUE if should ignore comments (in a * shell command */ char *line; /* Result */ char *ep; /* to strip trailing blanks */ again: semiNL = FALSE; ignDepOp = FALSE; ignComment = FALSE; lastc = '\0'; /* * Handle tab at the beginning of the line. A leading tab (shell * command) forces us to ignore comments and dependency operators and * treat semi-colons as semi-colons (by leaving semiNL FALSE). * This also discards completely blank lines. */ for (;;) { c = ParseReadc(); if (c == EOF) { if (ParsePopInput() == DONE) { /* End of all inputs - return NULL */ return (NULL); } continue; } if (c == '\t') { ignComment = ignDepOp = TRUE; lastc = c; break; } if (c != '\n') { ParseUnreadc(c); break; } CURFILE->lineno++; } buf = Buf_Init(MAKE_BSIZE); while (((c = ParseReadc()) != '\n' || lastc == '\\') && c != EOF) { test_char: switch (c) { case '\n': /* * Escaped newline: read characters until a * non-space or an unescaped newline and * replace them all by a single space. This is * done by storing the space over the backslash * and dropping through with the next nonspace. * If it is a semi-colon and semiNL is TRUE, * it will be recognized as a newline in the * code below this... */ CURFILE->lineno++; lastc = ' '; while ((c = ParseReadc()) == ' ' || c == '\t') { continue; } if (c == EOF || c == '\n') { goto line_read; } else { /* * Check for comments, semiNL's, etc. -- * easier than ParseUnreadc(c); * continue; */ goto test_char; } /*NOTREACHED*/ break; case ';': /* * Semi-colon: Need to see if it should be * interpreted as a newline */ if (semiNL) { /* * To make sure the command that may * be following this semi-colon begins * with a tab, we push one back into the * input stream. This will overwrite the * semi-colon in the buffer. If there is * no command following, this does no * harm, since the newline remains in * the buffer and the * whole line is ignored. */ ParseUnreadc('\t'); goto line_read; } break; case '=': if (!semiNL) { /* * Haven't seen a dependency operator * before this, so this must be a * variable assignment -- don't pay * attention to dependency operators * after this. */ ignDepOp = TRUE; } else if (lastc == ':' || lastc == '!') { /* * Well, we've seen a dependency * operator already, but it was the * previous character, so this is really * just an expanded variable assignment. * Revert semi-colons to being just * semi-colons again and ignore any more * dependency operators. * * XXX: Note that a line like * "foo : a:=b" will blow up, but who'd * write a line like that anyway? */ ignDepOp = TRUE; semiNL = FALSE; } break; case '#': if (!ignComment) { if (lastc != '\\') { /* * If the character is a hash * mark and it isn't escaped * (or we're being compatible), * the thing is a comment. * Skip to the end of the line. */ do { c = ParseReadc(); } while (c != '\n' && c != EOF); goto line_read; } else { /* * Don't add the backslash. * Just let the # get copied * over. */ lastc = c; continue; } } break; case ':': case '!': if (!ignDepOp) { /* * A semi-colon is recognized as a * newline only on dependency lines. * Dependency lines are lines with a * colon or an exclamation point. * Ergo... */ semiNL = TRUE; } break; default: break; } /* * Copy in the previous character (there may be none if this * was the first character) and save this one in * lastc. */ if (lastc != '\0') Buf_AddByte(buf, (Byte)lastc); lastc = c; } line_read: CURFILE->lineno++; if (lastc != '\0') { Buf_AddByte(buf, (Byte)lastc); } Buf_AddByte(buf, (Byte)'\0'); line = Buf_Peel(buf); /* * Strip trailing blanks and tabs from the line. * Do not strip a blank or tab that is preceded by * a '\' */ ep = line; while (*ep) ++ep; while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { if (ep > line + 1 && ep[-2] == '\\') break; --ep; } *ep = 0; if (line[0] == '\0') { /* empty line - just ignore */ free(line); goto again; } return (line); } /*- *----------------------------------------------------------------------- * ParseFinishLine -- * Handle the end of a dependency group. * * Results: * Nothing. * * Side Effects: * inLine set FALSE. 'targets' list destroyed. * *----------------------------------------------------------------------- */ static void ParseFinishLine(void) { const LstNode *ln; if (inLine) { LST_FOREACH(ln, &targets) { if (((const GNode *)Lst_Datum(ln))->type & OP_TRANSFORM) Suff_EndTransform(Lst_Datum(ln)); } Lst_Destroy(&targets, ParseHasCommands); inLine = FALSE; } } /** * parse_include * Parse an .include directive and push the file onto the input stack. * The input is the line minus the .include. 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 */ static void parse_include(char *file, int code __unused, int lineno __unused) { char *fullname; /* full pathname of file */ char endc; /* the character which ends the file spec */ char *cp; /* current position in file spec */ Boolean isSystem; /* TRUE if makefile is a system makefile */ char *prefEnd, *Fname; char *newName; /* * 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 == '<') { isSystem = TRUE; endc = '>'; } else { isSystem = FALSE; endc = '"'; } /* * Skip to matching delimiter */ for (cp = ++file; *cp != endc; cp++) { if (*cp == '\0') { Parse_Error(PARSE_FATAL, "Unclosed .include filename. '%c' expected", endc); return; } } *cp = '\0'; /* * Substitute for any variables in the file name before trying to * find the thing. */ file = Buf_Peel(Var_Subst(file, VAR_CMD, FALSE)); /* * 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. */ 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. */ /* Make a temporary copy of this, to be safe. */ Fname = estrdup(CURFILE->fname); prefEnd = strrchr(Fname, '/'); if (prefEnd != NULL) { *prefEnd = '\0'; if (file[0] == '/') newName = estrdup(file); else newName = str_concat(Fname, file, STR_ADDSLASH); fullname = Path_FindFile(newName, &parseIncPath); if (fullname == NULL) { fullname = Path_FindFile(newName, &dirSearchPath); } free(newName); *prefEnd = '/'; } else { fullname = NULL; } free(Fname); } else { fullname = NULL; } if (fullname == NULL) { /* * System makefile or 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 = Path_FindFile(file, &parseIncPath); if (fullname == NULL) { fullname = Path_FindFile(file, &dirSearchPath); } } if (fullname == NULL) { /* * Still haven't found the makefile. Look for it on the system * path as a last resort. */ fullname = Path_FindFile(file, &sysIncPath); } if (fullname == NULL) { *cp = endc; Parse_Error(PARSE_FATAL, "Could not find %s", file); free(file); return; } free(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. */ ParsePushInput(fullname, NULL, NULL, 0); } /** * parse_message * Parse a .warning or .error directive * * The input is the line minus the ".error"/".warning". We substitute * variables, print the message and exit(1) (for .error) or just print * a warning if the directive is malformed. */ static void parse_message(char *line, int iserror, int lineno __unused) { if (!isspace((u_char)*line)) { Parse_Error(PARSE_WARNING, "invalid syntax: .%s%s", iserror ? "error" : "warning", line); return; } while (isspace((u_char)*line)) line++; line = Buf_Peel(Var_Subst(line, VAR_GLOBAL, FALSE)); Parse_Error(iserror ? PARSE_FATAL : PARSE_WARNING, "%s", line); free(line); if (iserror) { /* Terminate immediately. */ exit(1); } } /** * parse_undef * Parse an .undef directive. */ static void parse_undef(char *line, int code __unused, int lineno __unused) { char *cp; while (isspace((u_char)*line)) line++; for (cp = line; !isspace((u_char)*cp) && *cp != '\0'; cp++) { ; } *cp = '\0'; cp = Buf_Peel(Var_Subst(line, VAR_CMD, FALSE)); Var_Delete(cp, VAR_GLOBAL); free(cp); } /** * parse_for * Parse a .for directive. */ static void parse_for(char *line, int code __unused, int lineno) { if (!For_For(line)) { /* syntax error */ return; } line = NULL; /* * Skip after the matching endfor. */ do { free(line); line = ParseSkipLine(0, 1); if (line == NULL) { Parse_Error(PARSE_FATAL, "Unexpected end of file in for loop.\n"); return; } } while (For_Eval(line)); free(line); /* execute */ For_Run(lineno); } /** * parse_endfor * Parse endfor. This may only happen if there was no matching .for. */ static void parse_endfor(char *line __unused, int code __unused, int lineno __unused) { Parse_Error(PARSE_FATAL, "for-less endfor"); } /** * parse_directive * Got a line starting with a '.'. Check if this is a directive * and parse it. * * return: * TRUE if line was a directive, FALSE otherwise. */ static Boolean parse_directive(char *line) { char *start; char *cp; int dir; /* * Get the keyword: * .[[:space:]]*\([[:alpha:]][[:alnum:]_]*\).* * \1 is the keyword. */ for (start = line; isspace((u_char)*start); start++) { ; } if (!isalpha((u_char)*start)) { return (FALSE); } cp = start + 1; while (isalnum((u_char)*cp) || *cp == '_') { cp++; } dir = directive_hash(start, cp - start); if (dir < 0 || dir >= (int)NDIRECTS || (size_t)(cp - start) != strlen(directives[dir].name) || strncmp(start, directives[dir].name, cp - start) != 0) { /* not actually matched */ return (FALSE); } if (!skipLine || directives[dir].skip_flag) (*directives[dir].func)(cp, directives[dir].code, CURFILE->lineno); return (TRUE); } /*- *--------------------------------------------------------------------- * 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 * * Results: * None * * Side Effects: * 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, FILE *stream) { char *cp; /* pointer into the line */ char *line; /* the line we're working on */ inLine = FALSE; fatals = 0; ParsePushInput(estrdup(name), stream, NULL, 0); while ((line = ParseReadLine()) != NULL) { if (*line == '.' && parse_directive(line + 1)) { /* directive consumed */ goto nextLine; } if (skipLine || *line == '#') { /* Skipping .if block or comment. */ goto nextLine; } if (*line == '\t') { /* * If a line starts with a tab, it can only * hope to be a creation command. */ for (cp = line + 1; isspace((unsigned char)*cp); cp++) { continue; } if (*cp) { if (inLine) { LstNode *ln; GNode *gn; /* * 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. */ LST_FOREACH(ln, &targets) { gn = Lst_Datum(ln); /* * if target already * supplied, ignore * commands */ if (!(gn->type & OP_HAS_COMMANDS)) Lst_AtEnd(&gn->commands, cp); else Parse_Error(PARSE_WARNING, "duplicate script " "for target \"%s\" ignored", gn->name); } continue; } else { Parse_Error(PARSE_FATAL, "Unassociated shell command \"%s\"", cp); } } #ifdef SYSVINCLUDE } else if (strncmp(line, "include", 7) == 0 && isspace((unsigned char)line[7]) && strchr(line, ':') == NULL) { /* * It's an S3/S5-style "include". */ ParseTraditionalInclude(line + 7); goto nextLine; #endif } else if (Parse_IsVar(line)) { ParseFinishLine(); Parse_DoVar(line, VAR_GLOBAL); } else { /* * 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... * 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. XXX this comment seems wrong. */ cp = line; if (isspace((unsigned char)line[0])) { while (*cp != '\0' && isspace((unsigned char)*cp)) { cp++; } if (*cp == '\0') { goto nextLine; } } ParseFinishLine(); cp = Buf_Peel(Var_Subst(line, VAR_CMD, TRUE)); free(line); line = cp; /* * Need a non-circular list for the target nodes */ Lst_Destroy(&targets, NOFREE); inLine = TRUE; ParseDoDependency(line); } nextLine: free(line); } ParseFinishLine(); /* * Make sure conditionals are clean */ Cond_End(); if (fatals) errx(1, "fatal errors encountered -- cannot continue"); } /*- *----------------------------------------------------------------------- * 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. * *----------------------------------------------------------------------- */ void Parse_MainName(Lst *listmain) { if (mainNode == NULL) { Punt("no target to make."); /*NOTREACHED*/ } else if (mainNode->type & OP_DOUBLEDEP) { Lst_AtEnd(listmain, mainNode); Lst_Concat(listmain, &mainNode->cohorts, LST_CONCNEW); } else Lst_AtEnd(listmain, mainNode); }