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// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "posix.h"
#include "lib.h"
#include "errarg.h"
#include "error.h"
extern "C" {
// Sun's stdlib.h fails to declare this.
char *mktemp(char *);
int mkstemp(char *);
}
// If this is set, create temporary files there
#define GROFF_TMPDIR_ENVVAR "GROFF_TMPDIR"
// otherwise if this is set, create temporary files there
#define TMPDIR_ENVVAR "TMPDIR"
// otherwise create temporary files here.
#define DEFAULT_TMPDIR "/tmp"
// Use this as the prefix for temporary filenames.
#define TMPFILE_PREFIX "groff"
/*
* Generate a temporary name template with a postfix
* immediately after the TMPFILE_PREFIX.
* It uses the groff preferences for a temporary directory.
* Note that no file name is either created or opened,
* only the *template* is returned.
*/
char *xtmptemplate(char *postfix=0)
{
const char *dir = getenv(GROFF_TMPDIR_ENVVAR);
int postlen = 0;
if (postfix)
postlen = strlen(postfix);
if (!dir) {
dir = getenv(TMPDIR_ENVVAR);
if (!dir)
dir = DEFAULT_TMPDIR;
}
const char *p = strrchr(dir, '/');
int needs_slash = (!p || p[1]);
char *templ = new char[strlen(dir) + needs_slash
+ sizeof(TMPFILE_PREFIX) - 1 + 6 + 1 + postlen];
strcpy(templ, dir);
if (needs_slash)
strcat(templ, "/");
strcat(templ, TMPFILE_PREFIX);
if (postlen > 0)
strcat(templ, postfix);
strcat(templ, "XXXXXX");
return( templ );
}
// Open a temporary file and with fatal error on failure.
#ifndef _MSC_VER
FILE *xtmpfile(char **namep=0, char *postfix=0, int do_unlink=1)
{
char *templ = xtmptemplate(postfix);
#ifdef HAVE_MKSTEMP
errno = 0;
int fd = mkstemp(templ);
if (fd < 0)
fatal("cannot create temporary file: %1", strerror(errno));
errno = 0;
FILE *fp = fdopen(fd, "w+");
if (!fp)
fatal("fdopen: %1", strerror(errno));
#else /* not HAVE_MKSTEMP */
if (!mktemp(templ) || !templ[0])
fatal("cannot create file name for temporary file");
errno = 0;
FILE *fp = fopen(templ, "w+");
if (!fp)
fatal("cannot open `%1': %2", templ, strerror(errno));
#endif /* not HAVE_MKSTEMP */
if ((do_unlink) && (unlink(templ) < 0))
error("cannot unlink `%1': %2", templ, strerror(errno));
if ((namep != 0) && ((*namep) != 0)) {
*namep = templ;
} else {
a_delete templ;
}
return fp;
}
#else
// If you're not running Unix, the following will do:
FILE *xtmpfile(char **namep, char *postfix=0, int do_unlink=1)
{
FILE *fp = tmpfile();
if (!fp)
fatal("couldn't create temporary file");
return fp;
}
#endif /* _MSC_VER */
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