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150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
/* Temporary file handling for tests.
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Copyright (C) 1998-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This is required to get an mkstemp which can create large files on
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some 32-bit platforms. */
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#define _FILE_OFFSET_BITS 64
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#include <support/temp_file.h>
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#include <support/temp_file-internal.h>
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#include <support/support.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* List of temporary files. */
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static struct temp_name_list
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{
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struct temp_name_list *next;
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char *name;
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pid_t owner;
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} *temp_name_list;
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/* Location of the temporary files. Set by the test skeleton via
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support_set_test_dir. The string is not be freed. */
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static const char *test_dir = _PATH_TMP;
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void
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add_temp_file (const char *name)
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{
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struct temp_name_list *newp
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= (struct temp_name_list *) xcalloc (sizeof (*newp), 1);
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char *newname = strdup (name);
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if (newname != NULL)
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{
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newp->name = newname;
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newp->next = temp_name_list;
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newp->owner = getpid ();
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temp_name_list = newp;
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}
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else
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free (newp);
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}
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int
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create_temp_file_in_dir (const char *base, const char *dir, char **filename)
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{
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char *fname;
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int fd;
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fname = xasprintf ("%s/%sXXXXXX", dir, base);
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fd = mkstemp (fname);
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if (fd == -1)
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{
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printf ("cannot open temporary file '%s': %m\n", fname);
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free (fname);
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return -1;
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}
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add_temp_file (fname);
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if (filename != NULL)
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*filename = fname;
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else
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free (fname);
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return fd;
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}
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int
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create_temp_file (const char *base, char **filename)
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{
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return create_temp_file_in_dir (base, test_dir, filename);
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}
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char *
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support_create_temp_directory (const char *base)
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{
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char *path = xasprintf ("%s/%sXXXXXX", test_dir, base);
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if (mkdtemp (path) == NULL)
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{
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printf ("error: mkdtemp (\"%s\"): %m", path);
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exit (1);
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}
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add_temp_file (path);
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return path;
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}
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/* Helper functions called by the test skeleton follow. */
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void
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support_set_test_dir (const char *path)
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{
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test_dir = path;
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}
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void
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support_delete_temp_files (void)
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{
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pid_t pid = getpid ();
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while (temp_name_list != NULL)
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{
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/* Only perform the removal if the path was registed in the same
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process, as identified by the PID. (This assumes that the
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parent process which registered the temporary file sticks
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around, to prevent PID reuse.) */
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if (temp_name_list->owner == pid)
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{
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if (remove (temp_name_list->name) != 0)
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printf ("warning: could not remove temporary file: %s: %m\n",
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temp_name_list->name);
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}
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free (temp_name_list->name);
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struct temp_name_list *next = temp_name_list->next;
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free (temp_name_list);
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temp_name_list = next;
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}
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}
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void
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support_print_temp_files (FILE *f)
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{
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if (temp_name_list != NULL)
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{
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struct temp_name_list *n;
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fprintf (f, "temp_files=(\n");
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for (n = temp_name_list; n != NULL; n = n->next)
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fprintf (f, " '%s'\n", n->name);
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fprintf (f, ")\n");
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}
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}
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