diff options
Diffstat (limited to 'src/libsystemd/sd-bus/bus-error.c')
| -rw-r--r-- | src/libsystemd/sd-bus/bus-error.c | 608 |
1 files changed, 0 insertions, 608 deletions
diff --git a/src/libsystemd/sd-bus/bus-error.c b/src/libsystemd/sd-bus/bus-error.c deleted file mode 100644 index 26219bdeed..0000000000 --- a/src/libsystemd/sd-bus/bus-error.c +++ /dev/null @@ -1,608 +0,0 @@ -/*** - 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 <stdarg.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "sd-bus.h" - -#include "alloc-util.h" -#include "bus-error.h" -#include "errno-list.h" -#include "string-util.h" -#include "util.h" - -BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map bus_standard_errors[] = { - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.Failed", EACCES), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.NoMemory", ENOMEM), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.ServiceUnknown", EHOSTUNREACH), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.NameHasNoOwner", ENXIO), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.NoReply", ETIMEDOUT), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.IOError", EIO), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.BadAddress", EADDRNOTAVAIL), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.NotSupported", EOPNOTSUPP), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.LimitsExceeded", ENOBUFS), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.AccessDenied", EACCES), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.AuthFailed", EACCES), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.InteractiveAuthorizationRequired", EACCES), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.NoServer", EHOSTDOWN), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.Timeout", ETIMEDOUT), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.NoNetwork", ENONET), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.AddressInUse", EADDRINUSE), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.Disconnected", ECONNRESET), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.InvalidArgs", EINVAL), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.FileNotFound", ENOENT), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.FileExists", EEXIST), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.UnknownMethod", EBADR), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.UnknownObject", EBADR), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.UnknownInterface", EBADR), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.UnknownProperty", EBADR), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.PropertyReadOnly", EROFS), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.UnixProcessIdUnknown", ESRCH), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.InvalidSignature", EINVAL), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.InconsistentMessage", EBADMSG), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.TimedOut", ETIMEDOUT), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.MatchRuleInvalid", EINVAL), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.InvalidFileContent", EINVAL), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.MatchRuleNotFound", ENOENT), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.SELinuxSecurityContextUnknown", ESRCH), - SD_BUS_ERROR_MAP("org.freedesktop.DBus.Error.ObjectPathInUse", EBUSY), - SD_BUS_ERROR_MAP_END -}; - -/* GCC maps this magically to the beginning and end of the BUS_ERROR_MAP section. - * Hide them; for currently unknown reasons they get exported to the shared libries - * even without being listed in the sym file. */ -extern const sd_bus_error_map __start_BUS_ERROR_MAP[] _hidden_; -extern const sd_bus_error_map __stop_BUS_ERROR_MAP[] _hidden_; - -/* Additional maps registered with sd_bus_error_add_map() are in this - * NULL terminated array */ -static const sd_bus_error_map **additional_error_maps = NULL; - -static int bus_error_name_to_errno(const char *name) { - const sd_bus_error_map **map, *m; - const char *p; - int r; - - if (!name) - return EINVAL; - - p = startswith(name, "System.Error."); - if (p) { - r = errno_from_name(p); - if (r < 0) - return EIO; - - return r; - } - - if (additional_error_maps) - for (map = additional_error_maps; *map; map++) - for (m = *map;; m++) { - /* For additional error maps the end marker is actually the end marker */ - if (m->code == BUS_ERROR_MAP_END_MARKER) - break; - - if (streq(m->name, name)) - return m->code; - } - - m = __start_BUS_ERROR_MAP; - while (m < __stop_BUS_ERROR_MAP) { - /* For magic ELF error maps, the end marker might - * appear in the middle of things, since multiple maps - * might appear in the same section. Hence, let's skip - * over it, but realign the pointer to the next 8 byte - * boundary, which is the selected alignment for the - * arrays. */ - if (m->code == BUS_ERROR_MAP_END_MARKER) { - m = ALIGN8_PTR(m+1); - continue; - } - - if (streq(m->name, name)) - return m->code; - - m++; - } - - return EIO; -} - -static sd_bus_error errno_to_bus_error_const(int error) { - - if (error < 0) - error = -error; - - switch (error) { - - case ENOMEM: - return BUS_ERROR_OOM; - - case EPERM: - case EACCES: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_ACCESS_DENIED, "Access denied"); - - case EINVAL: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid argument"); - - case ESRCH: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "No such process"); - - case ENOENT: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_NOT_FOUND, "File not found"); - - case EEXIST: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_EXISTS, "File exists"); - - case ETIMEDOUT: - case ETIME: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_TIMEOUT, "Timed out"); - - case EIO: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_IO_ERROR, "Input/output error"); - - case ENETRESET: - case ECONNABORTED: - case ECONNRESET: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_DISCONNECTED, "Disconnected"); - - case EOPNOTSUPP: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NOT_SUPPORTED, "Not supported"); - - case EADDRNOTAVAIL: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_BAD_ADDRESS, "Address not available"); - - case ENOBUFS: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_LIMITS_EXCEEDED, "Limits exceeded"); - - case EADDRINUSE: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_ADDRESS_IN_USE, "Address in use"); - - case EBADMSG: - return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Inconsistent message"); - } - - return SD_BUS_ERROR_NULL; -} - -static int errno_to_bus_error_name_new(int error, char **ret) { - const char *name; - char *n; - - if (error < 0) - error = -error; - - name = errno_to_name(error); - if (!name) - return 0; - - n = strappend("System.Error.", name); - if (!n) - return -ENOMEM; - - *ret = n; - return 1; -} - -bool bus_error_is_dirty(sd_bus_error *e) { - if (!e) - return false; - - return e->name || e->message || e->_need_free != 0; -} - -_public_ void sd_bus_error_free(sd_bus_error *e) { - if (!e) - return; - - if (e->_need_free > 0) { - free((void*) e->name); - free((void*) e->message); - } - - e->name = e->message = NULL; - e->_need_free = 0; -} - -_public_ int sd_bus_error_set(sd_bus_error *e, const char *name, const char *message) { - - if (!name) - return 0; - if (!e) - goto finish; - - assert_return(!bus_error_is_dirty(e), -EINVAL); - - e->name = strdup(name); - if (!e->name) { - *e = BUS_ERROR_OOM; - return -ENOMEM; - } - - if (message) - e->message = strdup(message); - - e->_need_free = 1; - -finish: - return -bus_error_name_to_errno(name); -} - -int bus_error_setfv(sd_bus_error *e, const char *name, const char *format, va_list ap) { - - if (!name) - return 0; - - if (e) { - assert_return(!bus_error_is_dirty(e), -EINVAL); - - e->name = strdup(name); - if (!e->name) { - *e = BUS_ERROR_OOM; - return -ENOMEM; - } - - /* If we hit OOM on formatting the pretty message, we ignore - * this, since we at least managed to write the error name */ - if (format) - (void) vasprintf((char**) &e->message, format, ap); - - e->_need_free = 1; - } - - return -bus_error_name_to_errno(name); -} - -_public_ int sd_bus_error_setf(sd_bus_error *e, const char *name, const char *format, ...) { - - if (format) { - int r; - va_list ap; - - va_start(ap, format); - r = bus_error_setfv(e, name, format, ap); - va_end(ap); - - return r; - } - - return sd_bus_error_set(e, name, NULL); -} - -_public_ int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) { - - if (!sd_bus_error_is_set(e)) - return 0; - if (!dest) - goto finish; - - assert_return(!bus_error_is_dirty(dest), -EINVAL); - - /* - * _need_free < 0 indicates that the error is temporarily const, needs deep copying - * _need_free == 0 indicates that the error is perpetually const, needs no deep copying - * _need_free > 0 indicates that the error is fully dynamic, needs deep copying - */ - - if (e->_need_free == 0) - *dest = *e; - else { - dest->name = strdup(e->name); - if (!dest->name) { - *dest = BUS_ERROR_OOM; - return -ENOMEM; - } - - if (e->message) - dest->message = strdup(e->message); - - dest->_need_free = 1; - } - -finish: - return -bus_error_name_to_errno(e->name); -} - -_public_ int sd_bus_error_set_const(sd_bus_error *e, const char *name, const char *message) { - if (!name) - return 0; - if (!e) - goto finish; - - assert_return(!bus_error_is_dirty(e), -EINVAL); - - *e = SD_BUS_ERROR_MAKE_CONST(name, message); - -finish: - return -bus_error_name_to_errno(name); -} - -_public_ int sd_bus_error_is_set(const sd_bus_error *e) { - if (!e) - return 0; - - return !!e->name; -} - -_public_ int sd_bus_error_has_name(const sd_bus_error *e, const char *name) { - if (!e) - return 0; - - return streq_ptr(e->name, name); -} - -_public_ int sd_bus_error_get_errno(const sd_bus_error* e) { - if (!e) - return 0; - - if (!e->name) - return 0; - - return bus_error_name_to_errno(e->name); -} - -static void bus_error_strerror(sd_bus_error *e, int error) { - size_t k = 64; - char *m; - - assert(e); - - for (;;) { - char *x; - - m = new(char, k); - if (!m) - return; - - errno = 0; - x = strerror_r(error, m, k); - if (errno == ERANGE || strlen(x) >= k - 1) { - free(m); - k *= 2; - continue; - } - - if (errno) { - free(m); - return; - } - - if (x == m) { - if (e->_need_free > 0) { - /* Error is already dynamic, let's just update the message */ - free((char*) e->message); - e->message = x; - - } else { - char *t; - /* Error was const so far, let's make it dynamic, if we can */ - - t = strdup(e->name); - if (!t) { - free(m); - return; - } - - e->_need_free = 1; - e->name = t; - e->message = x; - } - } else { - free(m); - - if (e->_need_free > 0) { - char *t; - - /* Error is dynamic, let's hence make the message also dynamic */ - t = strdup(x); - if (!t) - return; - - free((char*) e->message); - e->message = t; - } else { - /* Error is const, hence we can just override */ - e->message = x; - } - } - - return; - } -} - -_public_ int sd_bus_error_set_errno(sd_bus_error *e, int error) { - - if (error < 0) - error = -error; - - if (!e) - return -error; - if (error == 0) - return -error; - - assert_return(!bus_error_is_dirty(e), -EINVAL); - - /* First, try a const translation */ - *e = errno_to_bus_error_const(error); - - if (!sd_bus_error_is_set(e)) { - int k; - - /* If that didn't work, try a dynamic one. */ - - k = errno_to_bus_error_name_new(error, (char**) &e->name); - if (k > 0) - e->_need_free = 1; - else if (k < 0) { - *e = BUS_ERROR_OOM; - return -error; - } else - *e = BUS_ERROR_FAILED; - } - - /* Now, fill in the message from strerror() if we can */ - bus_error_strerror(e, error); - return -error; -} - -_public_ int sd_bus_error_set_errnofv(sd_bus_error *e, int error, const char *format, va_list ap) { - PROTECT_ERRNO; - int r; - - if (error < 0) - error = -error; - - if (!e) - return -error; - if (error == 0) - return 0; - - assert_return(!bus_error_is_dirty(e), -EINVAL); - - /* First, try a const translation */ - *e = errno_to_bus_error_const(error); - - if (!sd_bus_error_is_set(e)) { - int k; - - /* If that didn't work, try a dynamic one */ - - k = errno_to_bus_error_name_new(error, (char**) &e->name); - if (k > 0) - e->_need_free = 1; - else if (k < 0) { - *e = BUS_ERROR_OOM; - return -ENOMEM; - } else - *e = BUS_ERROR_FAILED; - } - - if (format) { - char *m; - - /* Then, let's try to fill in the supplied message */ - - errno = error; /* Make sure that %m resolves to the specified error */ - r = vasprintf(&m, format, ap); - if (r >= 0) { - - if (e->_need_free <= 0) { - char *t; - - t = strdup(e->name); - if (t) { - e->_need_free = 1; - e->name = t; - e->message = m; - return -error; - } - - free(m); - } else { - free((char*) e->message); - e->message = m; - return -error; - } - } - } - - /* If that didn't work, use strerror() for the message */ - bus_error_strerror(e, error); - return -error; -} - -_public_ int sd_bus_error_set_errnof(sd_bus_error *e, int error, const char *format, ...) { - int r; - - if (error < 0) - error = -error; - - if (!e) - return -error; - if (error == 0) - return 0; - - assert_return(!bus_error_is_dirty(e), -EINVAL); - - if (format) { - va_list ap; - - va_start(ap, format); - r = sd_bus_error_set_errnofv(e, error, format, ap); - va_end(ap); - - return r; - } - - return sd_bus_error_set_errno(e, error); -} - -const char *bus_error_message(const sd_bus_error *e, int error) { - - if (e) { - /* Sometimes, the D-Bus server is a little bit too verbose with - * its error messages, so let's override them here */ - if (sd_bus_error_has_name(e, SD_BUS_ERROR_ACCESS_DENIED)) - return "Access denied"; - - if (e->message) - return e->message; - } - - if (error < 0) - error = -error; - - return strerror(error); -} - -static bool map_ok(const sd_bus_error_map *map) { - for (; map->code != BUS_ERROR_MAP_END_MARKER; map++) - if (!map->name || map->code <=0) - return false; - return true; -} - -_public_ int sd_bus_error_add_map(const sd_bus_error_map *map) { - const sd_bus_error_map **maps = NULL; - unsigned n = 0; - - assert_return(map, -EINVAL); - assert_return(map_ok(map), -EINVAL); - - if (additional_error_maps) - for (; additional_error_maps[n] != NULL; n++) - if (additional_error_maps[n] == map) - return 0; - - maps = realloc_multiply(additional_error_maps, sizeof(struct sd_bus_error_map*), n + 2); - if (!maps) - return -ENOMEM; - - maps[n] = map; - maps[n+1] = NULL; - - additional_error_maps = maps; - return 1; -} |