diff options
Diffstat (limited to 'src/libsystemd-bus/bus-error.c')
| -rw-r--r-- | src/libsystemd-bus/bus-error.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/src/libsystemd-bus/bus-error.c b/src/libsystemd-bus/bus-error.c new file mode 100644 index 0000000000..5faa17384e --- /dev/null +++ b/src/libsystemd-bus/bus-error.c @@ -0,0 +1,177 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <stdlib.h> +#include <stdarg.h> +#include <stdbool.h> +#include <string.h> +#include <stdio.h> + +#include "util.h" + +#include "sd-bus.h" +#include "bus-error.h" + +bool bus_error_is_dirty(sd_bus_error *e) { + if (!e) + return 0; + + return e->name || e->message || e->need_free; +} + +void sd_bus_error_free(sd_bus_error *e) { + if (!e) + return; + + if (e->need_free) { + free((void*) e->name); + free((void*) e->message); + } + + e->name = e->message = NULL; + e->need_free = false; +} + +int sd_bus_error_set(sd_bus_error *e, const char *name, const char *format, ...) { + char *n, *m = NULL; + va_list ap; + int r; + + if (!e) + return 0; + if (bus_error_is_dirty(e)) + return -EINVAL; + if (!name) + return -EINVAL; + + n = strdup(name); + if (!n) + return -ENOMEM; + + if (format) { + va_start(ap, format); + r = vasprintf(&m, format, ap); + va_end(ap); + + if (r < 0) { + free(n); + return -ENOMEM; + } + } + + e->name = n; + e->message = m; + e->need_free = true; + + return 0; +} + +int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) { + char *x, *y = NULL; + + if (!dest) + return 0; + if (bus_error_is_dirty(dest)) + return -EINVAL; + if (!sd_bus_error_is_set(e)) + return 0; + + x = strdup(e->name); + if (!x) + return -ENOMEM; + + if (e->message) { + y = strdup(e->message); + if (!y) { + free(x); + return -ENOMEM; + } + } + + dest->name = x; + dest->message = y; + dest->need_free = true; + return 0; +} + +void sd_bus_error_set_const(sd_bus_error *e, const char *name, const char *message) { + if (!e) + return; + if (bus_error_is_dirty(e)) + return; + + e->name = name; + e->message = message; + e->need_free = false; +} + +int sd_bus_error_is_set(const sd_bus_error *e) { + if (!e) + return 0; + + return !!e->name; +} + +int sd_bus_error_has_name(const sd_bus_error *e, const char *name) { + if (!e) + return 0; + + return streq_ptr(e->name, name); +} + +int bus_error_to_errno(const sd_bus_error* e) { + + /* Better replce this with a gperf table */ + + if (!e->name) + return -EIO; + + if (streq(e->name, "org.freedesktop.DBus.Error.NoMemory")) + return -ENOMEM; + + if (streq(e->name, "org.freedesktop.DBus.Error.AuthFailed") || + streq(e->name, "org.freedesktop.DBus.Error.AccessDenied")) + return -EPERM; + + return -EIO; +} + +int bus_error_from_errno(sd_bus_error *e, int error) { + if (!e) + return error; + + if (error == -ENOMEM) + sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.NoMemory", strerror(-error)); + else if (error == -EPERM || error == -EACCES) + sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.AccessDenied", strerror(-error)); + else + sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.Failed", "Operation failed"); + + return error; +} + +const char *bus_error_message(const sd_bus_error *e, int error) { + if (e && e->message) + return e->message; + + return strerror(error); +} |