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c306703c6f
This avoids colliding with a config.h generated by a parent Meson project. In the Meson build system, we generate libglnx-config.h by doing our own checks, so we want to avoid it colliding. In the Autotools build system, we assume that the parent project will generate its own config.h that contains the results of LIBGLNX_CONFIGURE, and create a forwarding header libglnx-config.h in the $(top_builddir) (so that it is next to config.h). Note that after updating libglnx in an Autotools non-recursive-Make project (libostree, flatpak, flatpak-builder) it will be necessary to re-run autogen.sh. Signed-off-by: Simon McVittie <smcv@collabora.com>
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
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*
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* Copyright (C) 2014,2015 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 "libglnx-config.h"
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#include <glnx-backport-autocleanups.h>
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#include <glnx-errors.h>
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/* Set @error with G_IO_ERROR/G_IO_ERROR_FAILED.
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*
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* This function returns %FALSE so it can be used conveniently in a single
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* statement:
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*
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* ```
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* if (strcmp (foo, "somevalue") != 0)
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* return glnx_throw (error, "key must be somevalue, not '%s'", foo);
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* ```
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*/
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gboolean
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glnx_throw (GError **error,
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const char *fmt,
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...)
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{
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if (error == NULL)
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return FALSE;
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va_list args;
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va_start (args, fmt);
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GError *new = g_error_new_valist (G_IO_ERROR, G_IO_ERROR_FAILED, fmt, args);
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va_end (args);
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g_propagate_error (error, g_steal_pointer (&new));
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return FALSE;
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}
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void
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glnx_real_set_prefix_error_va (GError *error,
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const char *format,
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va_list args)
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{
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if (error == NULL)
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return;
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g_autofree char *old_msg = g_steal_pointer (&error->message);
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g_autoptr(GString) buf = g_string_new ("");
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g_string_append_vprintf (buf, format, args);
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g_string_append (buf, ": ");
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g_string_append (buf, old_msg);
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error->message = g_string_free (g_steal_pointer (&buf), FALSE);
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}
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/* Prepend to @error's message by `$prefix: ` where `$prefix` is computed via
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* printf @fmt. Returns %FALSE so it can be used conveniently in a single
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* statement:
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*
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* ```
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* if (!function_that_fails (s, error))
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* return glnx_throw_prefix (error, "while handling '%s'", s);
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* ```
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* */
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gboolean
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glnx_prefix_error (GError **error,
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const char *fmt,
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...)
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{
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if (error == NULL)
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return FALSE;
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va_list args;
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va_start (args, fmt);
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glnx_real_set_prefix_error_va (*error, fmt, args);
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va_end (args);
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return FALSE;
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}
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void
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glnx_real_set_prefix_error_from_errno_va (GError **error,
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gint errsv,
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const char *format,
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va_list args)
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{
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if (!error)
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return;
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g_set_error_literal (error,
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G_IO_ERROR,
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g_io_error_from_errno (errsv),
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g_strerror (errsv));
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glnx_real_set_prefix_error_va (*error, format, args);
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}
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/* Set @error using the value of `$prefix: g_strerror (errno)` where `$prefix`
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* is computed via printf @fmt.
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*
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* This function returns %FALSE so it can be used conveniently in a single
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* statement:
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*
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* ```
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* return glnx_throw_errno_prefix (error, "unlinking %s", pathname);
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* ```
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*/
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gboolean
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glnx_throw_errno_prefix (GError **error,
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const char *fmt,
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...)
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{
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int errsv = errno;
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va_list args;
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va_start (args, fmt);
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glnx_real_set_prefix_error_from_errno_va (error, errsv, fmt, args);
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va_end (args);
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/* See comment in glnx_throw_errno() about preserving errno */
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errno = errsv;
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return FALSE;
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}
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