100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
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// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include "posix.h"
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#include "lib.h"
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#include "errarg.h"
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#include "error.h"
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extern "C" {
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// Sun's stdlib.h fails to declare this.
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char *mktemp(char *);
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int mkstemp(char *);
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}
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// If this is set, create temporary files there
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#define GROFF_TMPDIR_ENVVAR "GROFF_TMPDIR"
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// otherwise if this is set, create temporary files there
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#define TMPDIR_ENVVAR "TMPDIR"
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// otherwise create temporary files here.
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#define DEFAULT_TMPDIR "/tmp"
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// Use this as the prefix for temporary filenames.
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#define TMPFILE_PREFIX "groff"
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// Open a temporary file with fatal error on failure.
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FILE *xtmpfile()
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{
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const char *dir = getenv(GROFF_TMPDIR_ENVVAR);
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if (!dir) {
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dir = getenv(TMPDIR_ENVVAR);
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if (!dir)
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dir = DEFAULT_TMPDIR;
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}
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const char *p = strrchr(dir, '/');
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int needs_slash = (!p || p[1]);
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char *templ = new char[strlen(dir) + needs_slash
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+ sizeof(TMPFILE_PREFIX) - 1 + 6 + 1];
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strcpy(templ, dir);
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if (needs_slash)
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strcat(templ, "/");
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strcat(templ, TMPFILE_PREFIX);
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strcat(templ, "XXXXXX");
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#ifdef HAVE_MKSTEMP
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errno = 0;
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int fd = mkstemp(templ);
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if (fd < 0)
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fatal("cannot create temporary file: %1", strerror(errno));
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errno = 0;
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FILE *fp = fdopen(fd, "w+");
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if (!fp)
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fatal("fdopen: %1", strerror(errno));
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#else /* not HAVE_MKSTEMP */
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if (!mktemp(templ) || !templ[0])
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fatal("cannot create file name for temporary file");
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errno = 0;
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FILE *fp = fopen(templ, "w+");
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if (!fp)
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fatal("cannot open `%1': %2", templ, strerror(errno));
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#endif /* not HAVE_MKSTEMP */
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if (unlink(templ) < 0)
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error("cannot unlink `%1': %2", templ, strerror(errno));
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a_delete templ;
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return fp;
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}
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#if 0
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// If you're not running Unix, the following will do:
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FILE *xtmpfile()
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{
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FILE *fp = tmpfile();
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if (!fp)
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fatal("couldn't create temporary file");
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return fp;
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}
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#endif
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