configure.in: See if `mkstemp' is available.

2000-11-15  Toon Moene  <toon@moene.indiv.nluug.nl>

	* libI77/configure.in: See if `mkstemp' is available.
	* libI77/configure: Regenerate.
	* libI77/open.c: Use `mkstemp' to create scratch
	file atomically.

From-SVN: r37484

libf2c/ChangeLog

+2000-11-15  Toon Moene  <toon@moene.indiv.nluug.nl>
+
+	* libI77/configure.in: See if `mkstemp' is available.
+	* libI77/configure: Regenerate.
+	* libI77/open.c: Use `mkstemp' to create scratch
+	file atomically.
+
 2000-07-03  Donn Terry  (donnte@microsoft.com)
         * libU77/aclocal.m4: check for 2 argument gettimeofday without
 	struct timezone

libf2c/libI77/configure

@@ -1338,7 +1338,7 @@ else
   echo "$ac_t""no" 1>&6
 fi
 
-for ac_func in tempnam
+for ac_func in mkstemp
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
 echo "configure:1345: checking for $ac_func" >&5
@@ -1393,25 +1393,80 @@ else
 fi
 done
 
+for ac_func in tempnam
+do
+echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
+echo "configure:1400: checking for $ac_func" >&5
+if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1405 "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func(); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char $ac_func();
+
+int main() {
+
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+$ac_func();
+#endif
+
+; return 0; }
+EOF
+if { (eval echo configure:1428: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=no"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_func 1
+EOF
+ 
+else
+  echo "$ac_t""no" 1>&6
+fi
+done
+
 
 # posix will guarantee the right behaviour for sprintf, else we can't be
 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
 # we're posix-conformant, so always do the test.
 echo $ac_n "checking for ansi/posix sprintf result""... $ac_c" 1>&6
-echo "configure:1403: checking for ansi/posix sprintf result" >&5
+echo "configure:1458: checking for ansi/posix sprintf result" >&5
 if test "$cross_compiling" = yes; then
   g77_cv_sys_sprintf_ansi=no
 else
   cat > conftest.$ac_ext <<EOF
-#line 1408 "configure"
+#line 1463 "configure"
 #include "confdefs.h"
   #include <stdio.h>
     /* does sprintf return the number of chars transferred? */
     main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
 
 EOF
-if { (eval echo configure:1415: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1470: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   g77_cv_sys_sprintf_ansi=yes
 else
@@ -1442,9 +1497,9 @@ fi
 
 # define NON_ANSI_RW_MODES on unix (can't hurt)
 echo $ac_n "checking NON_ANSI_RW_MODES""... $ac_c" 1>&6
-echo "configure:1446: checking NON_ANSI_RW_MODES" >&5
+echo "configure:1501: checking NON_ANSI_RW_MODES" >&5
 cat > conftest.$ac_ext <<EOF
-#line 1448 "configure"
+#line 1503 "configure"
 #include "confdefs.h"
 #ifdef unix
   yes

libf2c/libI77/configure.in

@@ -129,6 +129,7 @@ else
   AC_MSG_RESULT(no)
 fi
 
+AC_CHECK_FUNCS(mkstemp)
 AC_CHECK_FUNCS(tempnam)
 
 # posix will guarantee the right behaviour for sprintf, else we can't be

libf2c/libI77/open.c

@@ -133,10 +133,11 @@ integer f_open(olist *a)
 #endif
 {	unit *b;
 	integer rv;
-	char buf[256], *s;
+	char buf[256], *s, *env;
 	cllist x;
 	int ufmt;
 	FILE *tf;
+	int fd, len;
 #ifndef NON_UNIX_STDIO
 	int n;
 #endif
@@ -209,6 +210,19 @@ integer f_open(olist *a)
 	 case 's':
 	 case 'S':
 		b->uscrtch=1;
+#ifdef HAVE_MKSTEMP             /* Allow use of TMPDIR preferentially. */
+		env = getenv("TMPDIR");
+		if (!env) env = getenv("TEMP");
+		if (!env) env = "/tmp";
+		len = strlen(env);
+		if (len > 256 - sizeof "/tmp.FXXXXXX")
+		  err (a->oerr, 132, "open");
+		strcpy(buf, env);
+		strcat(buf, "/tmp.FXXXXXX");
+		fd = mkstemp(buf);
+		if (fd == -1 || close(fd))
+		  err (a->oerr, 132, "open");
+#else /* ! defined (HAVE_MKSTEMP) */
 #ifdef HAVE_TEMPNAM		/* Allow use of TMPDIR preferentially. */
 		s = tempnam (0, buf);
 		if (strlen (s) >= sizeof (buf))
@@ -223,6 +237,7 @@ integer f_open(olist *a)
 		(void) mktemp(buf);
 #endif
 #endif /* ! defined (HAVE_TEMPNAM) */
+#endif /* ! defined (HAVE_MKSTEMP) */
 		goto replace;
 	case 'n':
 	case 'N':