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File: [local] / src / usr.bin / make / varname.c (download)
Revision 1.6, Sat Aug 25 08:12:56 2012 UTC (11 years, 8 months ago) by espie
- make wrong variable specs (unterminated) parse errors. - add info to be able to pinpoint parse errors at runtime. - let job runners abort when a parse error happens while expanding a variable during execution - fix an infinite loop when compiling without FEATURE_RECVARS. okay millert@, krw@ the very few errors found out by this (less than 10 over src/X/ports) fixed trivially beforehand, as requested by deraadt@ |
/* $OpenBSD: varname.c,v 1.6 2012/08/25 08:12:56 espie Exp $ */ /* * Copyright (c) 2001 Marc Espie. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD * PROJECT 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. */ #include <stdlib.h> #include "config.h" #include "defines.h" #include "var.h" #include "buf.h" #include "varname.h" const char * VarName_Get(const char *start, struct Name *name, SymTable *ctxt, bool err, const char *(*cont)(const char *)) { const char *p; size_t len; p = cont(start); /* If we don't want recursive variables, we skip over '$' */ if (!FEATURES(FEATURE_RECVARS)) { while (*p == '$') p = cont(p+1); } if (*p != '$') { name->s = start; name->e = p; name->tofree = false; return p; } else { BUFFER buf; Buf_Init(&buf, MAKE_BSIZE); for (;;) { Buf_Addi(&buf, start, p); if (*p != '$') { name->s = (const char *)Buf_Retrieve(&buf); name->e = name->s + Buf_Size(&buf); name->tofree = true; return p; } start = p; Var_ParseBuffer(&buf, start, ctxt, err, &len); start += len; p = cont(start); } } } void VarName_Free(struct Name *name) { if (name->tofree) free((char *)name->s); }