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https://gitlab.freedesktop.org/NetworkManager/NetworkManager.git
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89623b99c4
See http://git.gnome.org/browse/libgsystem/tree/README for a description of libgsystem. What we specifically are using it for here is the local allocation macros; this patch just modifies main.c as a demo. Note this patch fixes a double-free in an error condition in check_pidfile(); those sort of mistakes are basically impossible to make when using these macros.
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
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*
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* Copyright (C) 2012 William Jon McCann <mccann@redhat.com>
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* Copyright (C) 2012 Colin Walters <walters@verbum.org>
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*
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* This 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 of the License, or (at your option) any later version.
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*
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* This 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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include "libgsystem.h"
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#include <glib/gstdio.h>
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#include <gio/gunixinputstream.h>
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#include <glib-unix.h>
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static int
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_open_fd_noatime (const char *path)
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{
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int fd;
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#ifdef O_NOATIME
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fd = g_open (path, O_RDONLY | O_NOATIME, 0);
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/* Only the owner or superuser may use O_NOATIME; so we may get
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* EPERM. EINVAL may happen if the kernel is really old...
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*/
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if (fd == -1 && (errno == EPERM || errno == EINVAL))
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#endif
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fd = g_open (path, O_RDONLY, 0);
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return fd;
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}
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/**
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* gs_file_read_noatime:
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* @file: a #GFile
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* @cancellable: a #GCancellable
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* @error: a #GError
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*
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* Like g_file_read(), but try to avoid updating the file's
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* access time. This should be used by background scanning
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* components such as search indexers, antivirus programs, etc.
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*
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* Returns: (transfer full): A new input stream, or %NULL on error
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*/
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GInputStream *
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gs_file_read_noatime (GFile *file,
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GCancellable *cancellable,
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GError **error)
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{
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gs_lfree char *path = NULL;
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int fd;
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if (g_cancellable_set_error_if_cancelled (cancellable, error))
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return NULL;
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path = g_file_get_path (file);
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if (path == NULL)
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return NULL;
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fd = _open_fd_noatime (path);
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if (fd < 0)
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{
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g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
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"%s", g_strerror (errno));
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return NULL;
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}
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return g_unix_input_stream_new (fd, TRUE);
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}
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