[src/trunk]: src/usr.bin/xlint/lint1 provide a poor man's fmemopen()

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/433196261046
branches:  trunk
changeset: 328807:433196261046
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Apr 18 21:53:44 2014 +0000

description:
provide a poor man's fmemopen()

diffstat:

 usr.bin/xlint/lint1/main1.c |  38 +++++++++++++++++++++++++++++++-------
 1 files changed, 31 insertions(+), 7 deletions(-)

diffs (78 lines):

diff -r 535474e5caed -r 433196261046 usr.bin/xlint/lint1/main1.c
--- a/usr.bin/xlint/lint1/main1.c       Fri Apr 18 21:45:22 2014 +0000
+++ b/usr.bin/xlint/lint1/main1.c       Fri Apr 18 21:53:44 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: main1.c,v 1.24 2014/04/18 02:17:14 christos Exp $      */
+/*     $NetBSD: main1.c,v 1.25 2014/04/18 21:53:44 christos Exp $      */
 
 /*
  * Copyright (c) 1994, 1995 Jochen Pohl
@@ -37,7 +37,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: main1.c,v 1.24 2014/04/18 02:17:14 christos Exp $");
+__RCSID("$NetBSD: main1.c,v 1.25 2014/04/18 21:53:44 christos Exp $");
 #endif
 
 #include <sys/types.h>
@@ -128,13 +128,37 @@
 
 static void    usage(void);
 
-#if !HAVE_NBTOOL_CONFIG_H
 static const char builtins[] =
     "int __builtin_isinf(long double);\n"
     "int __builtin_isnan(long double);\n"
     "int __builtin_copysign(long double, long double);\n"
 ;
+static size_t builtinlen = sizeof(builtins) - 1;
+
+static FILE *
+bltin(void)
+{
+#if HAVE_NBTOOL_CONFIG_H
+       char template[] = "/tmp/lint.XXXXXX";
+       int fd;
+       FILE *fp;
+       if ((fd = mkstemp(template)) == -1)
+               return NULL;
+       (void)unlink(template);
+       if ((fp = fdopen(fd, "r+")) == NULL) {
+               close(fd);
+               return NULL;
+       }
+       if (fwrite(builtins, 1, builtinlen, fp) != builtinlen) {
+               fclose(fp);
+               return NULL;
+       }
+       rewind(fp);
+       return fp;
+#else
+       return fmemopen(__UNCONST(builtins), builtinlen, "r");
 #endif
+}
 
 /*ARGSUSED*/
 static void
@@ -222,16 +246,16 @@
        initscan();
        initmtab();
 
-#if !HAVE_NBTOOL_CONFIG_H
-       if ((yyin = fmemopen(__UNCONST(builtins), sizeof(builtins) - 1, "r"))
-           == NULL)
+       if ((yyin = bltin()) == NULL)
                err(1, "cannot open builtins");
        yyparse();
-#endif
+       fclose(yyin);
+
        /* open the input file */
        if ((yyin = fopen(argv[0], "r")) == NULL)
                err(1, "cannot open '%s'", argv[0]);
        yyparse();
+       fclose(yyin);
 
        /* Following warnings cannot be suppressed by LINTED */
        lwarn = LWARN_ALL;