-/* -*- mode: C; c-file-style: "gnu" -*- */
-/* dbus-sysdeps.c Wrappers around system/libc features (internal to D-Bus implementation)
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/* dbus-sysdeps.c Wrappers around system/libc features shared between UNIX and Windows (internal to D-Bus implementation)
*
- * Copyright (C) 2002, 2003 Red Hat, Inc.
+ * Copyright (C) 2002, 2003, 2006 Red Hat, Inc.
* Copyright (C) 2003 CodeFactory AB
*
* Licensed under the Academic Free License version 2.1
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+#include <config.h>
#include "dbus-internals.h"
#include "dbus-sysdeps.h"
#include "dbus-threads.h"
#include "dbus-protocol.h"
#include "dbus-string.h"
-#include <sys/types.h>
+#include "dbus-list.h"
+#include "dbus-misc.h"
+
+/* NOTE: If you include any unix/windows-specific headers here, you are probably doing something
+ * wrong and should be putting some code in dbus-sysdeps-unix.c or dbus-sysdeps-win.c.
+ *
+ * These are the standard ANSI C headers...
+ */
+#if HAVE_LOCALE_H
+#include <locale.h>
+#endif
#include <stdlib.h>
#include <string.h>
-#include <signal.h>
-#include <unistd.h>
#include <stdio.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <dirent.h>
-#include <sys/un.h>
-#include <pwd.h>
-#include <time.h>
-#include <locale.h>
-#include <sys/time.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <grp.h>
-
-#ifdef HAVE_WRITEV
-#include <sys/uio.h>
-#endif
-#ifdef HAVE_POLL
-#include <sys/poll.h>
-#endif
-#ifdef HAVE_BACKTRACE
-#include <execinfo.h>
-#endif
-#ifdef HAVE_GETPEERUCRED
-#include <ucred.h>
-#endif
-#ifndef O_BINARY
-#define O_BINARY 0
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
#endif
-#ifndef HAVE_SOCKLEN_T
-#define socklen_t int
+#ifdef DBUS_WIN
+ #include <stdlib.h>
+#elif (defined __APPLE__)
+# include <crt_externs.h>
+# define environ (*_NSGetEnviron())
+#else
+extern char **environ;
#endif
/**
- * @addtogroup DBusInternalsUtils
+ * @defgroup DBusSysdeps Internal system-dependent API
+ * @ingroup DBusInternals
+ * @brief Internal system-dependent API available on UNIX and Windows
+ *
+ * The system-dependent API has a dual purpose. First, it encapsulates
+ * all usage of operating system APIs for ease of auditing and to
+ * avoid cluttering the rest of the code with bizarre OS quirks and
+ * headers. Second, it abstracts different operating system APIs for
+ * portability.
+ *
* @{
*/
-#ifndef DBUS_DISABLE_ASSERT
+
/**
* Aborts the program with SIGABRT (dumping core).
*/
void
_dbus_abort (void)
{
-#ifdef DBUS_ENABLE_VERBOSE_MODE
const char *s;
- s = _dbus_getenv ("DBUS_PRINT_BACKTRACE");
+
+ _dbus_print_backtrace ();
+
+ s = _dbus_getenv ("DBUS_BLOCK_ON_ABORT");
if (s && *s)
- _dbus_print_backtrace ();
-#endif
+ {
+ /* don't use _dbus_warn here since it can _dbus_abort() */
+ fprintf (stderr, " Process %lu sleeping for gdb attach\n", _dbus_pid_for_log ());
+ _dbus_sleep_milliseconds (1000 * 180);
+ }
+
abort ();
- _exit (1); /* in case someone manages to ignore SIGABRT */
+ _dbus_exit (1); /* in case someone manages to ignore SIGABRT ? */
}
-#endif
/**
+ * @ingroup DBusMisc
+ *
* Wrapper for setenv(). If the value is #NULL, unsets
* the environment variable.
*
- * @todo if someone can verify it's safe, we could avoid the
- * memleak when doing an unset.
+ * There is an unfixable memleak in that it is unsafe to
+ * free memory malloced for use with setenv. This is because
+ * we can not rely on internal implementation details of
+ * the underlying libc library.
+ *
+ * This function is not thread-safe, because altering the environment
+ * in Unix is not thread-safe in general.
*
* @param varname name of environment variable
- * @param value value of environment variable
- * @returns #TRUE on success.
+ * @param value value of environment variable, or #NULL to unset
+ * @returns #TRUE on success, #FALSE if not enough memory.
*/
dbus_bool_t
-_dbus_setenv (const char *varname,
- const char *value)
+dbus_setenv (const char *varname,
+ const char *value)
{
_dbus_assert (varname != NULL);
* will get upset about.
*/
- putenv_value = malloc (len + 1);
+ putenv_value = malloc (len + 2);
if (putenv_value == NULL)
return FALSE;
strcpy (putenv_value, varname);
+#if defined(DBUS_WIN)
+ strcat (putenv_value, "=");
+#endif
return (putenv (putenv_value) == 0);
#endif
const char*
_dbus_getenv (const char *varname)
{
+ /* Don't respect any environment variables if the current process is
+ * setuid. This is the equivalent of glibc's __secure_getenv().
+ */
+ if (_dbus_check_setuid ())
+ return NULL;
return getenv (varname);
}
/**
- * Thin wrapper around the read() system call that appends
- * the data it reads to the DBusString buffer. It appends
- * up to the given count, and returns the same value
- * and same errno as read(). The only exception is that
- * _dbus_read() handles EINTR for you. _dbus_read() can
- * return ENOMEM, even though regular UNIX read doesn't.
+ * Wrapper for clearenv().
*
- * @param fd the file descriptor to read from
- * @param buffer the buffer to append data to
- * @param count the amount of data to read
- * @returns the number of bytes read or -1
- */
-int
-_dbus_read (int fd,
- DBusString *buffer,
- int count)
-{
- int bytes_read;
- int start;
- char *data;
-
- _dbus_assert (count >= 0);
-
- start = _dbus_string_get_length (buffer);
-
- if (!_dbus_string_lengthen (buffer, count))
- {
- errno = ENOMEM;
- return -1;
- }
-
- data = _dbus_string_get_data_len (buffer, start, count);
-
- again:
-
- bytes_read = read (fd, data, count);
-
- if (bytes_read < 0)
- {
- if (errno == EINTR)
- goto again;
- else
- {
- /* put length back (note that this doesn't actually realloc anything) */
- _dbus_string_set_length (buffer, start);
- return -1;
- }
- }
- else
- {
- /* put length back (doesn't actually realloc) */
- _dbus_string_set_length (buffer, start + bytes_read);
-
-#if 0
- if (bytes_read > 0)
- _dbus_verbose_bytes_of_string (buffer, start, bytes_read);
-#endif
-
- return bytes_read;
- }
-}
-
-/**
- * Thin wrapper around the write() system call that writes a part of a
- * DBusString and handles EINTR for you.
- *
- * @param fd the file descriptor to write
- * @param buffer the buffer to write data from
- * @param start the first byte in the buffer to write
- * @param len the number of bytes to try to write
- * @returns the number of bytes written or -1 on error
+ * @returns #TRUE on success.
*/
-int
-_dbus_write (int fd,
- const DBusString *buffer,
- int start,
- int len)
+dbus_bool_t
+_dbus_clearenv (void)
{
- const char *data;
- int bytes_written;
-
- data = _dbus_string_get_const_data_len (buffer, start, len);
-
- again:
-
- bytes_written = write (fd, data, len);
+ dbus_bool_t rc = TRUE;
- if (bytes_written < 0 && errno == EINTR)
- goto again;
+#ifdef HAVE_CLEARENV
+ if (clearenv () != 0)
+ rc = FALSE;
+#else
-#if 0
- if (bytes_written > 0)
- _dbus_verbose_bytes_of_string (buffer, start, bytes_written);
+ if (environ != NULL)
+ environ[0] = NULL;
#endif
-
- return bytes_written;
-}
-/**
- * Like _dbus_write() but will use writev() if possible
- * to write both buffers in sequence. The return value
- * is the number of bytes written in the first buffer,
- * plus the number written in the second. If the first
- * buffer is written successfully and an error occurs
- * writing the second, the number of bytes in the first
- * is returned (i.e. the error is ignored), on systems that
- * don't have writev. Handles EINTR for you.
- * The second buffer may be #NULL.
- *
- * @param fd the file descriptor
- * @param buffer1 first buffer
- * @param start1 first byte to write in first buffer
- * @param len1 number of bytes to write from first buffer
- * @param buffer2 second buffer, or #NULL
- * @param start2 first byte to write in second buffer
- * @param len2 number of bytes to write in second buffer
- * @returns total bytes written from both buffers, or -1 on error
- */
-int
-_dbus_write_two (int fd,
- const DBusString *buffer1,
- int start1,
- int len1,
- const DBusString *buffer2,
- int start2,
- int len2)
-{
- _dbus_assert (buffer1 != NULL);
- _dbus_assert (start1 >= 0);
- _dbus_assert (start2 >= 0);
- _dbus_assert (len1 >= 0);
- _dbus_assert (len2 >= 0);
-
-#ifdef HAVE_WRITEV
- {
- struct iovec vectors[2];
- const char *data1;
- const char *data2;
- int bytes_written;
-
- data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
-
- if (buffer2 != NULL)
- data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
- else
- {
- data2 = NULL;
- start2 = 0;
- len2 = 0;
- }
-
- vectors[0].iov_base = (char*) data1;
- vectors[0].iov_len = len1;
- vectors[1].iov_base = (char*) data2;
- vectors[1].iov_len = len2;
-
- again:
-
- bytes_written = writev (fd,
- vectors,
- data2 ? 2 : 1);
-
- if (bytes_written < 0 && errno == EINTR)
- goto again;
-
- return bytes_written;
- }
-#else /* HAVE_WRITEV */
- {
- int ret1;
-
- ret1 = _dbus_write (fd, buffer1, start1, len1);
- if (ret1 == len1 && buffer2 != NULL)
- {
- ret2 = _dbus_write (fd, buffer2, start2, len2);
- if (ret2 < 0)
- ret2 = 0; /* we can't report an error as the first write was OK */
-
- return ret1 + ret2;
- }
- else
- return ret1;
- }
-#endif /* !HAVE_WRITEV */
+ return rc;
}
-#define _DBUS_MAX_SUN_PATH_LENGTH 99
-
-/**
- * @def _DBUS_MAX_SUN_PATH_LENGTH
- *
- * Maximum length of the path to a UNIX domain socket,
- * sockaddr_un::sun_path member. POSIX requires that all systems
- * support at least 100 bytes here, including the nul termination.
- * We use 99 for the max value to allow for the nul.
- *
- * We could probably also do sizeof (addr.sun_path)
- * but this way we are the same on all platforms
- * which is probably a good idea.
- */
-
/**
- * Creates a socket and connects it to the UNIX domain socket at the
- * given path. The connection fd is returned, and is set up as
- * nonblocking.
+ * Split paths into a list of char strings
*
- * Uses abstract sockets instead of filesystem-linked sockets if
- * requested (it's possible only on Linux; see "man 7 unix" on Linux).
- * On non-Linux abstract socket usage always fails.
- *
- * @param path the path to UNIX domain socket
- * @param abstract #TRUE to use abstract namespace
- * @param error return location for error code
- * @returns connection file descriptor or -1 on error
+ * @param dirs string with pathes
+ * @param suffix string concated to each path in dirs
+ * @param dir_list contains a list of splitted pathes
+ * return #TRUE is pathes could be splittes,#FALSE in oom case
*/
-int
-_dbus_connect_unix_socket (const char *path,
- dbus_bool_t abstract,
- DBusError *error)
+dbus_bool_t
+_dbus_split_paths_and_append (DBusString *dirs,
+ const char *suffix,
+ DBusList **dir_list)
{
- int fd;
- size_t path_len;
- struct sockaddr_un addr;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- _dbus_verbose ("connecting to unix socket %s abstract=%d\n",
- path, abstract);
-
- fd = socket (PF_UNIX, SOCK_STREAM, 0);
-
- if (fd < 0)
- {
- dbus_set_error (error,
- _dbus_error_from_errno (errno),
- "Failed to create socket: %s",
- _dbus_strerror (errno));
-
- return -1;
- }
+ int start;
+ int i;
+ int len;
+ char *cpath;
+ DBusString file_suffix;
- _DBUS_ZERO (addr);
- addr.sun_family = AF_UNIX;
- path_len = strlen (path);
+ start = 0;
+ i = 0;
- if (abstract)
- {
-#ifdef HAVE_ABSTRACT_SOCKETS
- addr.sun_path[0] = '\0'; /* this is what says "use abstract" */
- path_len++; /* Account for the extra nul byte added to the start of sun_path */
+ _dbus_string_init_const (&file_suffix, suffix);
- if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
- {
- dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
- "Abstract socket name too long\n");
- close (fd);
- return -1;
- }
-
- strncpy (&addr.sun_path[1], path, path_len);
- /* _dbus_verbose_bytes (addr.sun_path, sizeof (addr.sun_path)); */
-#else /* HAVE_ABSTRACT_SOCKETS */
- dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
- "Operating system does not support abstract socket namespace\n");
- close (fd);
- return -1;
-#endif /* ! HAVE_ABSTRACT_SOCKETS */
- }
- else
- {
- if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
- {
- dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
- "Socket name too long\n");
- close (fd);
- return -1;
- }
+ len = _dbus_string_get_length (dirs);
- strncpy (addr.sun_path, path, path_len);
- }
-
- if (connect (fd, (struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (struct sockaddr_un, sun_path) + path_len) < 0)
- {
- dbus_set_error (error,
- _dbus_error_from_errno (errno),
- "Failed to connect to socket %s: %s",
- path, _dbus_strerror (errno));
-
- close (fd);
- fd = -1;
-
- return -1;
- }
+ while (_dbus_string_find (dirs, start, _DBUS_PATH_SEPARATOR, &i))
+ {
+ DBusString path;
- if (!_dbus_set_fd_nonblocking (fd, error))
- {
- _DBUS_ASSERT_ERROR_IS_SET (error);
-
- close (fd);
- fd = -1;
+ if (!_dbus_string_init (&path))
+ goto oom;
- return -1;
- }
+ if (!_dbus_string_copy_len (dirs,
+ start,
+ i - start,
+ &path,
+ 0))
+ {
+ _dbus_string_free (&path);
+ goto oom;
+ }
- return fd;
-}
+ _dbus_string_chop_white (&path);
-/**
- * Creates a socket and binds it to the given path,
- * then listens on the socket. The socket is
- * set to be nonblocking.
- *
- * Uses abstract sockets instead of filesystem-linked
- * sockets if requested (it's possible only on Linux;
- * see "man 7 unix" on Linux).
- * On non-Linux abstract socket usage always fails.
- *
- * @param path the socket name
- * @param abstract #TRUE to use abstract namespace
- * @param error return location for errors
- * @returns the listening file descriptor or -1 on error
- */
-int
-_dbus_listen_unix_socket (const char *path,
- dbus_bool_t abstract,
- DBusError *error)
-{
- int listen_fd;
- struct sockaddr_un addr;
- size_t path_len;
+ /* check for an empty path */
+ if (_dbus_string_get_length (&path) == 0)
+ goto next;
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+ if (!_dbus_concat_dir_and_file (&path,
+ &file_suffix))
+ {
+ _dbus_string_free (&path);
+ goto oom;
+ }
- _dbus_verbose ("listening on unix socket %s abstract=%d\n",
- path, abstract);
-
- listen_fd = socket (PF_UNIX, SOCK_STREAM, 0);
-
- if (listen_fd < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to create socket \"%s\": %s",
- path, _dbus_strerror (errno));
- return -1;
- }
+ if (!_dbus_string_copy_data(&path, &cpath))
+ {
+ _dbus_string_free (&path);
+ goto oom;
+ }
- _DBUS_ZERO (addr);
- addr.sun_family = AF_UNIX;
- path_len = strlen (path);
-
- if (abstract)
- {
-#ifdef HAVE_ABSTRACT_SOCKETS
- /* remember that abstract names aren't nul-terminated so we rely
- * on sun_path being filled in with zeroes above.
- */
- addr.sun_path[0] = '\0'; /* this is what says "use abstract" */
- path_len++; /* Account for the extra nul byte added to the start of sun_path */
+ if (!_dbus_list_append (dir_list, cpath))
+ {
+ _dbus_string_free (&path);
+ dbus_free (cpath);
+ goto oom;
+ }
- if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
- {
- dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
- "Abstract socket name too long\n");
- close (listen_fd);
- return -1;
- }
+ next:
+ _dbus_string_free (&path);
+ start = i + 1;
+ }
- strncpy (&addr.sun_path[1], path, path_len);
- /* _dbus_verbose_bytes (addr.sun_path, sizeof (addr.sun_path)); */
-#else /* HAVE_ABSTRACT_SOCKETS */
- dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
- "Operating system does not support abstract socket namespace\n");
- close (listen_fd);
- return -1;
-#endif /* ! HAVE_ABSTRACT_SOCKETS */
- }
- else
- {
- /* FIXME discussed security implications of this with Nalin,
- * and we couldn't think of where it would kick our ass, but
- * it still seems a bit sucky. It also has non-security suckage;
- * really we'd prefer to exit if the socket is already in use.
- * But there doesn't seem to be a good way to do this.
- *
- * Just to be extra careful, I threw in the stat() - clearly
- * the stat() can't *fix* any security issue, but it at least
- * avoids inadvertent/accidental data loss.
- */
- {
- struct stat sb;
-
- if (stat (path, &sb) == 0 &&
- S_ISSOCK (sb.st_mode))
- unlink (path);
- }
-
- if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
+ if (start != len)
+ {
+ DBusString path;
+
+ if (!_dbus_string_init (&path))
+ goto oom;
+
+ if (!_dbus_string_copy_len (dirs,
+ start,
+ len - start,
+ &path,
+ 0))
{
- dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
- "Abstract socket name too long\n");
- close (listen_fd);
- return -1;
- }
-
- strncpy (addr.sun_path, path, path_len);
- }
-
- if (bind (listen_fd, (struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (struct sockaddr_un, sun_path) + path_len) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to bind socket \"%s\": %s",
- path, _dbus_strerror (errno));
- close (listen_fd);
- return -1;
- }
-
- if (listen (listen_fd, 30 /* backlog */) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to listen on socket \"%s\": %s",
- path, _dbus_strerror (errno));
- close (listen_fd);
- return -1;
- }
-
- if (!_dbus_set_fd_nonblocking (listen_fd, error))
- {
- _DBUS_ASSERT_ERROR_IS_SET (error);
- close (listen_fd);
- return -1;
- }
-
- /* Try opening up the permissions, but if we can't, just go ahead
- * and continue, maybe it will be good enough.
- */
- if (!abstract && chmod (path, 0777) < 0)
- _dbus_warn ("Could not set mode 0777 on socket %s\n",
- path);
-
- return listen_fd;
-}
-
-/**
- * Creates a socket and connects to a socket at the given host
- * and port. The connection fd is returned, and is set up as
- * nonblocking.
- *
- * @param host the host name to connect to
- * @param port the prot to connect to
- * @param error return location for error code
- * @returns connection file descriptor or -1 on error
- */
-int
-_dbus_connect_tcp_socket (const char *host,
- dbus_uint32_t port,
- DBusError *error)
-{
- int fd;
- struct sockaddr_in addr;
- struct hostent *he;
- struct in_addr *haddr;
+ _dbus_string_free (&path);
+ goto oom;
+ }
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- fd = socket (AF_INET, SOCK_STREAM, 0);
-
- if (fd < 0)
- {
- dbus_set_error (error,
- _dbus_error_from_errno (errno),
- "Failed to create socket: %s",
- _dbus_strerror (errno));
-
- return -1;
- }
+ if (!_dbus_concat_dir_and_file (&path,
+ &file_suffix))
+ {
+ _dbus_string_free (&path);
+ goto oom;
+ }
- if (host == NULL)
- host = "localhost";
+ if (!_dbus_string_copy_data(&path, &cpath))
+ {
+ _dbus_string_free (&path);
+ goto oom;
+ }
- he = gethostbyname (host);
- if (he == NULL)
- {
- dbus_set_error (error,
- _dbus_error_from_errno (errno),
- "Failed to lookup hostname: %s",
- host);
- close (fd);
- return -1;
- }
-
- haddr = ((struct in_addr *) (he->h_addr_list)[0]);
+ if (!_dbus_list_append (dir_list, cpath))
+ {
+ _dbus_string_free (&path);
+ dbus_free (cpath);
+ goto oom;
+ }
- _DBUS_ZERO (addr);
- memcpy (&addr.sin_addr, haddr, sizeof(struct in_addr));
- addr.sin_family = AF_INET;
- addr.sin_port = htons (port);
-
- if (connect (fd, (struct sockaddr*) &addr, sizeof (addr)) < 0)
- {
- dbus_set_error (error,
- _dbus_error_from_errno (errno),
- "Failed to connect to socket %s:%d %s",
- host, port, _dbus_strerror (errno));
-
- close (fd);
- fd = -1;
-
- return -1;
+ _dbus_string_free (&path);
}
- if (!_dbus_set_fd_nonblocking (fd, error))
- {
- close (fd);
- fd = -1;
-
- return -1;
- }
+ return TRUE;
- return fd;
+ oom:
+ _dbus_list_foreach (dir_list, (DBusForeachFunction)dbus_free, NULL);
+ _dbus_list_clear (dir_list);
+ return FALSE;
}
+/** @} */
+
/**
- * Creates a socket and binds it to the given path,
- * then listens on the socket. The socket is
- * set to be nonblocking.
+ * @addtogroup DBusString
*
- * @param host the host name to listen on
- * @param port the prot to listen on
- * @param error return location for errors
- * @returns the listening file descriptor or -1 on error
+ * @{
*/
-int
-_dbus_listen_tcp_socket (const char *host,
- dbus_uint32_t port,
- DBusError *error)
-{
- int listen_fd;
- struct sockaddr_in addr;
- struct hostent *he;
- struct in_addr *haddr;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- listen_fd = socket (AF_INET, SOCK_STREAM, 0);
-
- if (listen_fd < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to create socket \"%s:%d\": %s",
- host, port, _dbus_strerror (errno));
- return -1;
- }
-
- he = gethostbyname (host);
- if (he == NULL)
- {
- dbus_set_error (error,
- _dbus_error_from_errno (errno),
- "Failed to lookup hostname: %s",
- host);
- close (listen_fd);
- return -1;
- }
-
- haddr = ((struct in_addr *) (he->h_addr_list)[0]);
-
- _DBUS_ZERO (addr);
- memcpy (&addr.sin_addr, haddr, sizeof (struct in_addr));
- addr.sin_family = AF_INET;
- addr.sin_port = htons (port);
-
- if (bind (listen_fd, (struct sockaddr*) &addr, sizeof (struct sockaddr)))
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to bind socket \"%s:%d\": %s",
- host, port, _dbus_strerror (errno));
- close (listen_fd);
- return -1;
- }
-
- if (listen (listen_fd, 30 /* backlog */) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to listen on socket \"%s:%d\": %s",
- host, port, _dbus_strerror (errno));
- close (listen_fd);
- return -1;
- }
-
- if (!_dbus_set_fd_nonblocking (listen_fd, error))
- {
- close (listen_fd);
- return -1;
- }
-
- return listen_fd;
-}
-
-static dbus_bool_t
-write_credentials_byte (int server_fd,
- DBusError *error)
-{
- int bytes_written;
- char buf[1] = { '\0' };
-#if defined(HAVE_CMSGCRED) && !defined(LOCAL_CREDS)
- struct {
- struct cmsghdr hdr;
- struct cmsgcred cred;
- } cmsg;
- struct iovec iov;
- struct msghdr msg;
-#endif
-
-#if defined(HAVE_CMSGCRED) && !defined(LOCAL_CREDS)
- iov.iov_base = buf;
- iov.iov_len = 1;
-
- memset (&msg, 0, sizeof (msg));
- msg.msg_iov = &iov;
- msg.msg_iovlen = 1;
-
- msg.msg_control = &cmsg;
- msg.msg_controllen = sizeof (cmsg);
- memset (&cmsg, 0, sizeof (cmsg));
- cmsg.hdr.cmsg_len = sizeof (cmsg);
- cmsg.hdr.cmsg_level = SOL_SOCKET;
- cmsg.hdr.cmsg_type = SCM_CREDS;
-#endif
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- again:
-
-#if defined(HAVE_CMSGCRED) && !defined(LOCAL_CREDS)
- bytes_written = sendmsg (server_fd, &msg, 0);
-#else
- bytes_written = write (server_fd, buf, 1);
-#endif
-
- if (bytes_written < 0 && errno == EINTR)
- goto again;
-
- if (bytes_written < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to write credentials byte: %s",
- _dbus_strerror (errno));
- return FALSE;
- }
- else if (bytes_written == 0)
- {
- dbus_set_error (error, DBUS_ERROR_IO_ERROR,
- "wrote zero bytes writing credentials byte");
- return FALSE;
- }
- else
- {
- _dbus_assert (bytes_written == 1);
- _dbus_verbose ("wrote credentials byte\n");
- return TRUE;
- }
-}
-
/**
- * Reads a single byte which must be nul (an error occurs otherwise),
- * and reads unix credentials if available. Fills in pid/uid/gid with
- * -1 if no credentials are available. Return value indicates whether
- * a byte was read, not whether we got valid credentials. On some
- * systems, such as Linux, reading/writing the byte isn't actually
- * required, but we do it anyway just to avoid multiple codepaths.
+ * Appends an integer to a DBusString.
*
- * Fails if no byte is available, so you must select() first.
- *
- * The point of the byte is that on some systems we have to
- * use sendmsg()/recvmsg() to transmit credentials.
- *
- * @param client_fd the client file descriptor
- * @param credentials struct to fill with credentials of client
- * @param error location to store error code
- * @returns #TRUE on success
+ * @param str the string
+ * @param value the integer value
+ * @returns #FALSE if not enough memory or other failure.
*/
dbus_bool_t
-_dbus_read_credentials_unix_socket (int client_fd,
- DBusCredentials *credentials,
- DBusError *error)
+_dbus_string_append_int (DBusString *str,
+ long value)
{
- struct msghdr msg;
- struct iovec iov;
- char buf;
-
-#ifdef HAVE_CMSGCRED
- struct {
- struct cmsghdr hdr;
- struct cmsgcred cred;
- } cmsg;
-#endif
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+ /* this calculation is from comp.lang.c faq */
+#define MAX_LONG_LEN ((sizeof (long) * 8 + 2) / 3 + 1) /* +1 for '-' */
+ int orig_len;
+ int i;
+ char *buf;
- /* The POSIX spec certainly doesn't promise this, but
- * we need these assertions to fail as soon as we're wrong about
- * it so we can do the porting fixups
- */
- _dbus_assert (sizeof (pid_t) <= sizeof (credentials->pid));
- _dbus_assert (sizeof (uid_t) <= sizeof (credentials->uid));
- _dbus_assert (sizeof (gid_t) <= sizeof (credentials->gid));
-
- _dbus_credentials_clear (credentials);
-
-#if defined(LOCAL_CREDS) && defined(HAVE_CMSGCRED)
- /* Set the socket to receive credentials on the next message */
- {
- int on = 1;
- if (setsockopt (client_fd, 0, LOCAL_CREDS, &on, sizeof (on)) < 0)
- {
- _dbus_verbose ("Unable to set LOCAL_CREDS socket option\n");
- return FALSE;
- }
- }
-#endif
-
- iov.iov_base = &buf;
- iov.iov_len = 1;
-
- memset (&msg, 0, sizeof (msg));
- msg.msg_iov = &iov;
- msg.msg_iovlen = 1;
-
-#ifdef HAVE_CMSGCRED
- memset (&cmsg, 0, sizeof (cmsg));
- msg.msg_control = &cmsg;
- msg.msg_controllen = sizeof (cmsg);
-#endif
+ orig_len = _dbus_string_get_length (str);
- again:
- if (recvmsg (client_fd, &msg, 0) < 0)
- {
- if (errno == EINTR)
- goto again;
+ if (!_dbus_string_lengthen (str, MAX_LONG_LEN))
+ return FALSE;
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to read credentials byte: %s",
- _dbus_strerror (errno));
- return FALSE;
- }
+ buf = _dbus_string_get_data_len (str, orig_len, MAX_LONG_LEN);
- if (buf != '\0')
- {
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "Credentials byte was not nul");
- return FALSE;
- }
+ snprintf (buf, MAX_LONG_LEN, "%ld", value);
-#ifdef HAVE_CMSGCRED
- if (cmsg.hdr.cmsg_len < sizeof (cmsg) || cmsg.hdr.cmsg_type != SCM_CREDS)
+ i = 0;
+ while (*buf)
{
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "Message from recvmsg() was not SCM_CREDS");
- return FALSE;
+ ++buf;
+ ++i;
}
-#endif
-
- _dbus_verbose ("read credentials byte\n");
-
- {
-#ifdef SO_PEERCRED
- struct ucred cr;
- int cr_len = sizeof (cr);
-
- if (getsockopt (client_fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) == 0 &&
- cr_len == sizeof (cr))
- {
- credentials->pid = cr.pid;
- credentials->uid = cr.uid;
- credentials->gid = cr.gid;
- }
- else
- {
- _dbus_verbose ("Failed to getsockopt() credentials, returned len %d/%d: %s\n",
- cr_len, (int) sizeof (cr), _dbus_strerror (errno));
- }
-#elif defined(HAVE_CMSGCRED)
- credentials->pid = cmsg.cred.cmcred_pid;
- credentials->uid = cmsg.cred.cmcred_euid;
- credentials->gid = cmsg.cred.cmcred_groups[0];
-#elif defined(HAVE_GETPEEREID)
- uid_t euid;
- gid_t egid;
- if (getpeereid (client_fd, &euid, &egid) == 0)
- {
- credentials->uid = euid;
- credentials->gid = egid;
- }
- else
- {
- _dbus_verbose ("Failed to getpeereid() credentials: %s\n", _dbus_strerror (errno));
- }
-#elif defined(HAVE_GETPEERUCRED)
- ucred_t * ucred = NULL;
- if (getpeerucred (client_fd, &ucred) == 0)
- {
- credentials->pid = ucred_getpid (ucred);
- credentials->uid = ucred_geteuid (ucred);
- credentials->gid = ucred_getegid (ucred);
- }
- else
- {
- _dbus_verbose ("Failed to getpeerucred() credentials: %s\n", _dbus_strerror (errno));
- }
- if (ucred != NULL)
- ucred_free (ucred);
-#else /* !SO_PEERCRED && !HAVE_CMSGCRED && !HAVE_GETPEEREID && !HAVE_GETPEERUCRED */
- _dbus_verbose ("Socket credentials not supported on this OS\n");
-#endif
- }
-
- _dbus_verbose ("Credentials:"
- " pid "DBUS_PID_FORMAT
- " uid "DBUS_UID_FORMAT
- " gid "DBUS_GID_FORMAT"\n",
- credentials->pid,
- credentials->uid,
- credentials->gid);
-
- return TRUE;
-}
-
-/**
- * Sends a single nul byte with our UNIX credentials as ancillary
- * data. Returns #TRUE if the data was successfully written. On
- * systems that don't support sending credentials, just writes a byte,
- * doesn't send any credentials. On some systems, such as Linux,
- * reading/writing the byte isn't actually required, but we do it
- * anyway just to avoid multiple codepaths.
- *
- * Fails if no byte can be written, so you must select() first.
- *
- * The point of the byte is that on some systems we have to
- * use sendmsg()/recvmsg() to transmit credentials.
- *
- * @param server_fd file descriptor for connection to server
- * @param error return location for error code
- * @returns #TRUE if the byte was sent
- */
-dbus_bool_t
-_dbus_send_credentials_unix_socket (int server_fd,
- DBusError *error)
-{
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- if (write_credentials_byte (server_fd, error))
- return TRUE;
- else
- return FALSE;
-}
-
-/**
- * Accepts a connection on a listening socket.
- * Handles EINTR for you.
- *
- * @param listen_fd the listen file descriptor
- * @returns the connection fd of the client, or -1 on error
- */
-int
-_dbus_accept (int listen_fd)
-{
- int client_fd;
- struct sockaddr addr;
- socklen_t addrlen;
-
- addrlen = sizeof (addr);
-
- retry:
- client_fd = accept (listen_fd, &addr, &addrlen);
-
- if (client_fd < 0)
- {
- if (errno == EINTR)
- goto retry;
- }
-
- return client_fd;
-}
-
-/** @} */
-
-/**
- * @addtogroup DBusString
- *
- * @{
- */
-/**
- * Appends an integer to a DBusString.
- *
- * @param str the string
- * @param value the integer value
- * @returns #FALSE if not enough memory or other failure.
- */
-dbus_bool_t
-_dbus_string_append_int (DBusString *str,
- long value)
-{
- /* this calculation is from comp.lang.c faq */
-#define MAX_LONG_LEN ((sizeof (long) * 8 + 2) / 3 + 1) /* +1 for '-' */
- int orig_len;
- int i;
- char *buf;
-
- orig_len = _dbus_string_get_length (str);
-
- if (!_dbus_string_lengthen (str, MAX_LONG_LEN))
- return FALSE;
-
- buf = _dbus_string_get_data_len (str, orig_len, MAX_LONG_LEN);
-
- snprintf (buf, MAX_LONG_LEN, "%ld", value);
-
- i = 0;
- while (*buf)
- {
- ++buf;
- ++i;
- }
-
- _dbus_string_shorten (str, MAX_LONG_LEN - i);
-
- return TRUE;
-}
-
-/**
- * Appends an unsigned integer to a DBusString.
- *
- * @param str the string
- * @param value the integer value
- * @returns #FALSE if not enough memory or other failure.
- */
-dbus_bool_t
-_dbus_string_append_uint (DBusString *str,
- unsigned long value)
-{
- /* this is wrong, but definitely on the high side. */
-#define MAX_ULONG_LEN (MAX_LONG_LEN * 2)
- int orig_len;
- int i;
- char *buf;
-
- orig_len = _dbus_string_get_length (str);
-
- if (!_dbus_string_lengthen (str, MAX_ULONG_LEN))
- return FALSE;
-
- buf = _dbus_string_get_data_len (str, orig_len, MAX_ULONG_LEN);
-
- snprintf (buf, MAX_ULONG_LEN, "%lu", value);
-
- i = 0;
- while (*buf)
- {
- ++buf;
- ++i;
- }
-
- _dbus_string_shorten (str, MAX_ULONG_LEN - i);
-
- return TRUE;
-}
-
-#ifdef DBUS_BUILD_TESTS
-/**
- * Appends a double to a DBusString.
- *
- * @param str the string
- * @param value the floating point value
- * @returns #FALSE if not enough memory or other failure.
- */
-dbus_bool_t
-_dbus_string_append_double (DBusString *str,
- double value)
-{
-#define MAX_DOUBLE_LEN 64 /* this is completely made up :-/ */
- int orig_len;
- char *buf;
- int i;
-
- orig_len = _dbus_string_get_length (str);
-
- if (!_dbus_string_lengthen (str, MAX_DOUBLE_LEN))
- return FALSE;
-
- buf = _dbus_string_get_data_len (str, orig_len, MAX_DOUBLE_LEN);
-
- snprintf (buf, MAX_LONG_LEN, "%g", value);
-
- i = 0;
- while (*buf)
- {
- ++buf;
- ++i;
- }
-
- _dbus_string_shorten (str, MAX_DOUBLE_LEN - i);
-
- return TRUE;
-}
-#endif /* DBUS_BUILD_TESTS */
-
-/**
- * Parses an integer contained in a DBusString. Either return parameter
- * may be #NULL if you aren't interested in it. The integer is parsed
- * and stored in value_return. Return parameters are not initialized
- * if the function returns #FALSE.
- *
- * @param str the string
- * @param start the byte index of the start of the integer
- * @param value_return return location of the integer value or #NULL
- * @param end_return return location of the end of the integer, or #NULL
- * @returns #TRUE on success
- */
-dbus_bool_t
-_dbus_string_parse_int (const DBusString *str,
- int start,
- long *value_return,
- int *end_return)
-{
- long v;
- const char *p;
- char *end;
-
- p = _dbus_string_get_const_data_len (str, start,
- _dbus_string_get_length (str) - start);
-
- end = NULL;
- errno = 0;
- v = strtol (p, &end, 0);
- if (end == NULL || end == p || errno != 0)
- return FALSE;
-
- if (value_return)
- *value_return = v;
- if (end_return)
- *end_return = start + (end - p);
-
- return TRUE;
-}
-
-/**
-* Checks to make sure the given directory is
-* private to the user
-*
-* @param dir the name of the directory
-* @param error error return
-* @returns #FALSE on failure
-**/
-dbus_bool_t
-_dbus_check_dir_is_private_to_user (DBusString *dir, DBusError *error)
-{
- const char *directory;
- struct stat sb;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- directory = _dbus_string_get_const_data (dir);
-
- if (stat (directory, &sb) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "%s", _dbus_strerror (errno));
-
- return FALSE;
- }
-
- if ((S_IROTH & sb.st_mode) || (S_IWOTH & sb.st_mode) ||
- (S_IRGRP & sb.st_mode) || (S_IWGRP & sb.st_mode))
- {
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "%s directory is not private to the user", directory);
- return FALSE;
- }
-
- return TRUE;
-}
-
-/**
- * Parses an unsigned integer contained in a DBusString. Either return
- * parameter may be #NULL if you aren't interested in it. The integer
- * is parsed and stored in value_return. Return parameters are not
- * initialized if the function returns #FALSE.
- *
- * @param str the string
- * @param start the byte index of the start of the integer
- * @param value_return return location of the integer value or #NULL
- * @param end_return return location of the end of the integer, or #NULL
- * @returns #TRUE on success
- */
-dbus_bool_t
-_dbus_string_parse_uint (const DBusString *str,
- int start,
- unsigned long *value_return,
- int *end_return)
-{
- unsigned long v;
- const char *p;
- char *end;
-
- p = _dbus_string_get_const_data_len (str, start,
- _dbus_string_get_length (str) - start);
-
- end = NULL;
- errno = 0;
- v = strtoul (p, &end, 0);
- if (end == NULL || end == p || errno != 0)
- return FALSE;
-
- if (value_return)
- *value_return = v;
- if (end_return)
- *end_return = start + (end - p);
-
- return TRUE;
-}
-
-#ifdef DBUS_BUILD_TESTS
-static dbus_bool_t
-ascii_isspace (char c)
-{
- return (c == ' ' ||
- c == '\f' ||
- c == '\n' ||
- c == '\r' ||
- c == '\t' ||
- c == '\v');
-}
-#endif /* DBUS_BUILD_TESTS */
-
-#ifdef DBUS_BUILD_TESTS
-static dbus_bool_t
-ascii_isdigit (char c)
-{
- return c >= '0' && c <= '9';
-}
-#endif /* DBUS_BUILD_TESTS */
-
-#ifdef DBUS_BUILD_TESTS
-static dbus_bool_t
-ascii_isxdigit (char c)
-{
- return (ascii_isdigit (c) ||
- (c >= 'a' && c <= 'f') ||
- (c >= 'A' && c <= 'F'));
-}
-#endif /* DBUS_BUILD_TESTS */
-
-#ifdef DBUS_BUILD_TESTS
-/* Calls strtod in a locale-independent fashion, by looking at
- * the locale data and patching the decimal comma to a point.
- *
- * Relicensed from glib.
- */
-static double
-ascii_strtod (const char *nptr,
- char **endptr)
-{
- char *fail_pos;
- double val;
- struct lconv *locale_data;
- const char *decimal_point;
- int decimal_point_len;
- const char *p, *decimal_point_pos;
- const char *end = NULL; /* Silence gcc */
-
- fail_pos = NULL;
-
- locale_data = localeconv ();
- decimal_point = locale_data->decimal_point;
- decimal_point_len = strlen (decimal_point);
-
- _dbus_assert (decimal_point_len != 0);
-
- decimal_point_pos = NULL;
- if (decimal_point[0] != '.' ||
- decimal_point[1] != 0)
- {
- p = nptr;
- /* Skip leading space */
- while (ascii_isspace (*p))
- p++;
-
- /* Skip leading optional sign */
- if (*p == '+' || *p == '-')
- p++;
-
- if (p[0] == '0' &&
- (p[1] == 'x' || p[1] == 'X'))
- {
- p += 2;
- /* HEX - find the (optional) decimal point */
-
- while (ascii_isxdigit (*p))
- p++;
-
- if (*p == '.')
- {
- decimal_point_pos = p++;
-
- while (ascii_isxdigit (*p))
- p++;
-
- if (*p == 'p' || *p == 'P')
- p++;
- if (*p == '+' || *p == '-')
- p++;
- while (ascii_isdigit (*p))
- p++;
- end = p;
- }
- }
- else
- {
- while (ascii_isdigit (*p))
- p++;
-
- if (*p == '.')
- {
- decimal_point_pos = p++;
-
- while (ascii_isdigit (*p))
- p++;
-
- if (*p == 'e' || *p == 'E')
- p++;
- if (*p == '+' || *p == '-')
- p++;
- while (ascii_isdigit (*p))
- p++;
- end = p;
- }
- }
- /* For the other cases, we need not convert the decimal point */
- }
-
- /* Set errno to zero, so that we can distinguish zero results
- and underflows */
- errno = 0;
-
- if (decimal_point_pos)
- {
- char *copy, *c;
-
- /* We need to convert the '.' to the locale specific decimal point */
- copy = dbus_malloc (end - nptr + 1 + decimal_point_len);
-
- c = copy;
- memcpy (c, nptr, decimal_point_pos - nptr);
- c += decimal_point_pos - nptr;
- memcpy (c, decimal_point, decimal_point_len);
- c += decimal_point_len;
- memcpy (c, decimal_point_pos + 1, end - (decimal_point_pos + 1));
- c += end - (decimal_point_pos + 1);
- *c = 0;
-
- val = strtod (copy, &fail_pos);
-
- if (fail_pos)
- {
- if (fail_pos > decimal_point_pos)
- fail_pos = (char *)nptr + (fail_pos - copy) - (decimal_point_len - 1);
- else
- fail_pos = (char *)nptr + (fail_pos - copy);
- }
-
- dbus_free (copy);
-
- }
- else
- val = strtod (nptr, &fail_pos);
-
- if (endptr)
- *endptr = fail_pos;
-
- return val;
-}
-#endif /* DBUS_BUILD_TESTS */
-
-#ifdef DBUS_BUILD_TESTS
-/**
- * Parses a floating point number contained in a DBusString. Either
- * return parameter may be #NULL if you aren't interested in it. The
- * integer is parsed and stored in value_return. Return parameters are
- * not initialized if the function returns #FALSE.
- *
- * @param str the string
- * @param start the byte index of the start of the float
- * @param value_return return location of the float value or #NULL
- * @param end_return return location of the end of the float, or #NULL
- * @returns #TRUE on success
- */
-dbus_bool_t
-_dbus_string_parse_double (const DBusString *str,
- int start,
- double *value_return,
- int *end_return)
-{
- double v;
- const char *p;
- char *end;
-
- p = _dbus_string_get_const_data_len (str, start,
- _dbus_string_get_length (str) - start);
-
- end = NULL;
- errno = 0;
- v = ascii_strtod (p, &end);
- if (end == NULL || end == p || errno != 0)
- return FALSE;
-
- if (value_return)
- *value_return = v;
- if (end_return)
- *end_return = start + (end - p);
-
- return TRUE;
-}
-#endif /* DBUS_BUILD_TESTS */
-
-/** @} */ /* DBusString group */
-
-/**
- * @addtogroup DBusInternalsUtils
- * @{
- */
-static dbus_bool_t
-fill_user_info_from_passwd (struct passwd *p,
- DBusUserInfo *info,
- DBusError *error)
-{
- _dbus_assert (p->pw_name != NULL);
- _dbus_assert (p->pw_dir != NULL);
-
- info->uid = p->pw_uid;
- info->primary_gid = p->pw_gid;
- info->username = _dbus_strdup (p->pw_name);
- info->homedir = _dbus_strdup (p->pw_dir);
-
- if (info->username == NULL ||
- info->homedir == NULL)
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- return FALSE;
- }
-
- return TRUE;
-}
-
-static dbus_bool_t
-fill_user_info (DBusUserInfo *info,
- dbus_uid_t uid,
- const DBusString *username,
- DBusError *error)
-{
- const char *username_c;
-
- /* exactly one of username/uid provided */
- _dbus_assert (username != NULL || uid != DBUS_UID_UNSET);
- _dbus_assert (username == NULL || uid == DBUS_UID_UNSET);
-
- info->uid = DBUS_UID_UNSET;
- info->primary_gid = DBUS_GID_UNSET;
- info->group_ids = NULL;
- info->n_group_ids = 0;
- info->username = NULL;
- info->homedir = NULL;
-
- if (username != NULL)
- username_c = _dbus_string_get_const_data (username);
- else
- username_c = NULL;
-
- /* For now assuming that the getpwnam() and getpwuid() flavors
- * are always symmetrical, if not we have to add more configure
- * checks
- */
-
-#if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
- {
- struct passwd *p;
- int result;
- char buf[1024];
- struct passwd p_str;
-
- p = NULL;
-#ifdef HAVE_POSIX_GETPWNAM_R
- if (uid != DBUS_UID_UNSET)
- result = getpwuid_r (uid, &p_str, buf, sizeof (buf),
- &p);
- else
- result = getpwnam_r (username_c, &p_str, buf, sizeof (buf),
- &p);
-#else
- if (uid != DBUS_UID_UNSET)
- p = getpwuid_r (uid, &p_str, buf, sizeof (buf));
- else
- p = getpwnam_r (username_c, &p_str, buf, sizeof (buf));
- result = 0;
-#endif /* !HAVE_POSIX_GETPWNAM_R */
- if (result == 0 && p == &p_str)
- {
- if (!fill_user_info_from_passwd (p, info, error))
- return FALSE;
- }
- else
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "User \"%s\" unknown or no memory to allocate password entry\n",
- username_c ? username_c : "???");
- _dbus_verbose ("User %s unknown\n", username_c ? username_c : "???");
- return FALSE;
- }
- }
-#else /* ! HAVE_GETPWNAM_R */
- {
- /* I guess we're screwed on thread safety here */
- struct passwd *p;
-
- if (uid != DBUS_UID_UNSET)
- p = getpwuid (uid);
- else
- p = getpwnam (username_c);
-
- if (p != NULL)
- {
- if (!fill_user_info_from_passwd (p, info, error))
- return FALSE;
- }
- else
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "User \"%s\" unknown or no memory to allocate password entry\n",
- username_c ? username_c : "???");
- _dbus_verbose ("User %s unknown\n", username_c ? username_c : "???");
- return FALSE;
- }
- }
-#endif /* ! HAVE_GETPWNAM_R */
-
- /* Fill this in so we can use it to get groups */
- username_c = info->username;
-#ifdef HAVE_GETGROUPLIST
- {
- gid_t *buf;
- int buf_count;
- int i;
-
- buf_count = 17;
- buf = dbus_new (gid_t, buf_count);
- if (buf == NULL)
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- goto failed;
- }
-
- if (getgrouplist (username_c,
- info->primary_gid,
- buf, &buf_count) < 0)
- {
- gid_t *new = dbus_realloc (buf, buf_count * sizeof (buf[0]));
- if (new == NULL)
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- dbus_free (buf);
- goto failed;
- }
-
- buf = new;
-
- errno = 0;
- if (getgrouplist (username_c, info->primary_gid, buf, &buf_count) < 0)
- {
- dbus_set_error (error,
- _dbus_error_from_errno (errno),
- "Failed to get groups for username \"%s\" primary GID "
- DBUS_GID_FORMAT ": %s\n",
- username_c, info->primary_gid,
- _dbus_strerror (errno));
- dbus_free (buf);
- goto failed;
- }
- }
-
- info->group_ids = dbus_new (dbus_gid_t, buf_count);
- if (info->group_ids == NULL)
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- dbus_free (buf);
- goto failed;
- }
-
- for (i = 0; i < buf_count; ++i)
- info->group_ids[i] = buf[i];
-
- info->n_group_ids = buf_count;
-
- dbus_free (buf);
- }
-#else /* HAVE_GETGROUPLIST */
- {
- /* We just get the one group ID */
- info->group_ids = dbus_new (dbus_gid_t, 1);
- if (info->group_ids == NULL)
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- goto failed;
- }
-
- info->n_group_ids = 1;
-
- (info->group_ids)[0] = info->primary_gid;
- }
-#endif /* HAVE_GETGROUPLIST */
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- return TRUE;
-
- failed:
- _DBUS_ASSERT_ERROR_IS_SET (error);
- return FALSE;
-}
-
-/**
- * Gets user info for the given username.
- *
- * @param info user info object to initialize
- * @param username the username
- * @param error error return
- * @returns #TRUE on success
- */
-dbus_bool_t
-_dbus_user_info_fill (DBusUserInfo *info,
- const DBusString *username,
- DBusError *error)
-{
- return fill_user_info (info, DBUS_UID_UNSET,
- username, error);
-}
-
-/**
- * Gets user info for the given user ID.
- *
- * @param info user info object to initialize
- * @param uid the user ID
- * @param error error return
- * @returns #TRUE on success
- */
-dbus_bool_t
-_dbus_user_info_fill_uid (DBusUserInfo *info,
- dbus_uid_t uid,
- DBusError *error)
-{
- return fill_user_info (info, uid,
- NULL, error);
-}
-
-/**
- * Frees the members of info
- * (but not info itself)
- * @param info the user info struct
- */
-void
-_dbus_user_info_free (DBusUserInfo *info)
-{
- dbus_free (info->group_ids);
- dbus_free (info->username);
- dbus_free (info->homedir);
-}
-
-/**
- * Frees the members of info (but not info itself).
- *
- * @param info the group info
- */
-void
-_dbus_group_info_free (DBusGroupInfo *info)
-{
- dbus_free (info->groupname);
-}
-
-/**
- * Sets fields in DBusCredentials to DBUS_PID_UNSET,
- * DBUS_UID_UNSET, DBUS_GID_UNSET.
- *
- * @param credentials the credentials object to fill in
- */
-void
-_dbus_credentials_clear (DBusCredentials *credentials)
-{
- credentials->pid = DBUS_PID_UNSET;
- credentials->uid = DBUS_UID_UNSET;
- credentials->gid = DBUS_GID_UNSET;
-}
-
-/**
- * Gets the credentials of the current process.
- *
- * @param credentials credentials to fill in.
- */
-void
-_dbus_credentials_from_current_process (DBusCredentials *credentials)
-{
- /* The POSIX spec certainly doesn't promise this, but
- * we need these assertions to fail as soon as we're wrong about
- * it so we can do the porting fixups
- */
- _dbus_assert (sizeof (pid_t) <= sizeof (credentials->pid));
- _dbus_assert (sizeof (uid_t) <= sizeof (credentials->uid));
- _dbus_assert (sizeof (gid_t) <= sizeof (credentials->gid));
-
- credentials->pid = getpid ();
- credentials->uid = getuid ();
- credentials->gid = getgid ();
-}
-
-/**
- * Checks whether the provided_credentials are allowed to log in
- * as the expected_credentials.
- *
- * @param expected_credentials credentials we're trying to log in as
- * @param provided_credentials credentials we have
- * @returns #TRUE if we can log in
- */
-dbus_bool_t
-_dbus_credentials_match (const DBusCredentials *expected_credentials,
- const DBusCredentials *provided_credentials)
-{
- if (provided_credentials->uid == DBUS_UID_UNSET)
- return FALSE;
- else if (expected_credentials->uid == DBUS_UID_UNSET)
- return FALSE;
- else if (provided_credentials->uid == 0)
- return TRUE;
- else if (provided_credentials->uid == expected_credentials->uid)
- return TRUE;
- else
- return FALSE;
-}
-
-/**
- * Gets our process ID
- * @returns process ID
- */
-unsigned long
-_dbus_getpid (void)
-{
- return getpid ();
-}
-
-/** Gets our UID
- * @returns process UID
- */
-dbus_uid_t
-_dbus_getuid (void)
-{
- return getuid ();
-}
-
-#ifdef DBUS_BUILD_TESTS
-/** Gets our GID
- * @returns process GID
- */
-dbus_gid_t
-_dbus_getgid (void)
-{
- return getgid ();
-}
-#endif
-
-_DBUS_DEFINE_GLOBAL_LOCK (atomic);
-
-#ifdef DBUS_USE_ATOMIC_INT_486
-/* Taken from CVS version 1.7 of glibc's sysdeps/i386/i486/atomicity.h */
-/* Since the asm stuff here is gcc-specific we go ahead and use "inline" also */
-static inline dbus_int32_t
-atomic_exchange_and_add (DBusAtomic *atomic,
- volatile dbus_int32_t val)
-{
- register dbus_int32_t result;
-
- __asm__ __volatile__ ("lock; xaddl %0,%1"
- : "=r" (result), "=m" (atomic->value)
- : "0" (val), "m" (atomic->value));
- return result;
-}
-#endif
-
-/**
- * Atomically increments an integer
- *
- * @param atomic pointer to the integer to increment
- * @returns the value before incrementing
- *
- * @todo implement arch-specific faster atomic ops
- */
-dbus_int32_t
-_dbus_atomic_inc (DBusAtomic *atomic)
-{
-#ifdef DBUS_USE_ATOMIC_INT_486
- return atomic_exchange_and_add (atomic, 1);
-#else
- dbus_int32_t res;
- _DBUS_LOCK (atomic);
- res = atomic->value;
- atomic->value += 1;
- _DBUS_UNLOCK (atomic);
- return res;
-#endif
-}
-
-/**
- * Atomically decrement an integer
- *
- * @param atomic pointer to the integer to decrement
- * @returns the value before decrementing
- *
- * @todo implement arch-specific faster atomic ops
- */
-dbus_int32_t
-_dbus_atomic_dec (DBusAtomic *atomic)
-{
-#ifdef DBUS_USE_ATOMIC_INT_486
- return atomic_exchange_and_add (atomic, -1);
-#else
- dbus_int32_t res;
-
- _DBUS_LOCK (atomic);
- res = atomic->value;
- atomic->value -= 1;
- _DBUS_UNLOCK (atomic);
- return res;
-#endif
-}
-
-/**
- * Wrapper for poll().
- *
- * @param fds the file descriptors to poll
- * @param n_fds number of descriptors in the array
- * @param timeout_milliseconds timeout or -1 for infinite
- * @returns numbers of fds with revents, or <0 on error
- */
-int
-_dbus_poll (DBusPollFD *fds,
- int n_fds,
- int timeout_milliseconds)
-{
-#ifdef HAVE_POLL
- /* This big thing is a constant expression and should get optimized
- * out of existence. So it's more robust than a configure check at
- * no cost.
- */
- if (_DBUS_POLLIN == POLLIN &&
- _DBUS_POLLPRI == POLLPRI &&
- _DBUS_POLLOUT == POLLOUT &&
- _DBUS_POLLERR == POLLERR &&
- _DBUS_POLLHUP == POLLHUP &&
- _DBUS_POLLNVAL == POLLNVAL &&
- sizeof (DBusPollFD) == sizeof (struct pollfd) &&
- _DBUS_STRUCT_OFFSET (DBusPollFD, fd) ==
- _DBUS_STRUCT_OFFSET (struct pollfd, fd) &&
- _DBUS_STRUCT_OFFSET (DBusPollFD, events) ==
- _DBUS_STRUCT_OFFSET (struct pollfd, events) &&
- _DBUS_STRUCT_OFFSET (DBusPollFD, revents) ==
- _DBUS_STRUCT_OFFSET (struct pollfd, revents))
- {
- return poll ((struct pollfd*) fds,
- n_fds,
- timeout_milliseconds);
- }
- else
- {
- /* We have to convert the DBusPollFD to an array of
- * struct pollfd, poll, and convert back.
- */
- _dbus_warn ("didn't implement poll() properly for this system yet\n");
- return -1;
- }
-#else /* ! HAVE_POLL */
-
- fd_set read_set, write_set, err_set;
- int max_fd = 0;
- int i;
- struct timeval tv;
- int ready;
-
- FD_ZERO (&read_set);
- FD_ZERO (&write_set);
- FD_ZERO (&err_set);
-
- for (i = 0; i < n_fds; i++)
- {
- DBusPollFD *fdp = &fds[i];
-
- if (fdp->events & _DBUS_POLLIN)
- FD_SET (fdp->fd, &read_set);
-
- if (fdp->events & _DBUS_POLLOUT)
- FD_SET (fdp->fd, &write_set);
-
- FD_SET (fdp->fd, &err_set);
-
- max_fd = MAX (max_fd, fdp->fd);
- }
-
- tv.tv_sec = timeout_milliseconds / 1000;
- tv.tv_usec = (timeout_milliseconds % 1000) * 1000;
-
- ready = select (max_fd + 1, &read_set, &write_set, &err_set,
- timeout_milliseconds < 0 ? NULL : &tv);
-
- if (ready > 0)
- {
- for (i = 0; i < n_fds; i++)
- {
- DBusPollFD *fdp = &fds[i];
-
- fdp->revents = 0;
-
- if (FD_ISSET (fdp->fd, &read_set))
- fdp->revents |= _DBUS_POLLIN;
-
- if (FD_ISSET (fdp->fd, &write_set))
- fdp->revents |= _DBUS_POLLOUT;
-
- if (FD_ISSET (fdp->fd, &err_set))
- fdp->revents |= _DBUS_POLLERR;
- }
- }
-
- return ready;
-#endif
-}
-
-/** nanoseconds in a second */
-#define NANOSECONDS_PER_SECOND 1000000000
-/** microseconds in a second */
-#define MICROSECONDS_PER_SECOND 1000000
-/** milliseconds in a second */
-#define MILLISECONDS_PER_SECOND 1000
-/** nanoseconds in a millisecond */
-#define NANOSECONDS_PER_MILLISECOND 1000000
-/** microseconds in a millisecond */
-#define MICROSECONDS_PER_MILLISECOND 1000
-
-/**
- * Sleeps the given number of milliseconds.
- * @param milliseconds number of milliseconds
- */
-void
-_dbus_sleep_milliseconds (int milliseconds)
-{
-#ifdef HAVE_NANOSLEEP
- struct timespec req;
- struct timespec rem;
-
- req.tv_sec = milliseconds / MILLISECONDS_PER_SECOND;
- req.tv_nsec = (milliseconds % MILLISECONDS_PER_SECOND) * NANOSECONDS_PER_MILLISECOND;
- rem.tv_sec = 0;
- rem.tv_nsec = 0;
-
- while (nanosleep (&req, &rem) < 0 && errno == EINTR)
- req = rem;
-#elif defined (HAVE_USLEEP)
- usleep (milliseconds * MICROSECONDS_PER_MILLISECOND);
-#else /* ! HAVE_USLEEP */
- sleep (MAX (milliseconds / 1000, 1));
-#endif
-}
-
-/**
- * Get current time, as in gettimeofday().
- *
- * @param tv_sec return location for number of seconds
- * @param tv_usec return location for number of microseconds (thousandths)
- */
-void
-_dbus_get_current_time (long *tv_sec,
- long *tv_usec)
-{
- struct timeval t;
-
- gettimeofday (&t, NULL);
-
- if (tv_sec)
- *tv_sec = t.tv_sec;
- if (tv_usec)
- *tv_usec = t.tv_usec;
-}
-
-/**
- * Appends the contents of the given file to the string,
- * returning error code. At the moment, won't open a file
- * more than a megabyte in size.
- *
- * @param str the string to append to
- * @param filename filename to load
- * @param error place to set an error
- * @returns #FALSE if error was set
- */
-dbus_bool_t
-_dbus_file_get_contents (DBusString *str,
- const DBusString *filename,
- DBusError *error)
-{
- int fd;
- struct stat sb;
- int orig_len;
- int total;
- const char *filename_c;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- filename_c = _dbus_string_get_const_data (filename);
-
- /* O_BINARY useful on Cygwin */
- fd = open (filename_c, O_RDONLY | O_BINARY);
- if (fd < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to open \"%s\": %s",
- filename_c,
- _dbus_strerror (errno));
- return FALSE;
- }
-
- if (fstat (fd, &sb) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to stat \"%s\": %s",
- filename_c,
- _dbus_strerror (errno));
-
- _dbus_verbose ("fstat() failed: %s",
- _dbus_strerror (errno));
-
- close (fd);
-
- return FALSE;
- }
-
- if (sb.st_size > _DBUS_ONE_MEGABYTE)
- {
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "File size %lu of \"%s\" is too large.",
- (unsigned long) sb.st_size, filename_c);
- close (fd);
- return FALSE;
- }
-
- total = 0;
- orig_len = _dbus_string_get_length (str);
- if (sb.st_size > 0 && S_ISREG (sb.st_mode))
- {
- int bytes_read;
-
- while (total < (int) sb.st_size)
- {
- bytes_read = _dbus_read (fd, str,
- sb.st_size - total);
- if (bytes_read <= 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Error reading \"%s\": %s",
- filename_c,
- _dbus_strerror (errno));
-
- _dbus_verbose ("read() failed: %s",
- _dbus_strerror (errno));
-
- close (fd);
- _dbus_string_set_length (str, orig_len);
- return FALSE;
- }
- else
- total += bytes_read;
- }
-
- close (fd);
- return TRUE;
- }
- else if (sb.st_size != 0)
- {
- _dbus_verbose ("Can only open regular files at the moment.\n");
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "\"%s\" is not a regular file",
- filename_c);
- close (fd);
- return FALSE;
- }
- else
- {
- close (fd);
- return TRUE;
- }
-}
-
-/**
- * Writes a string out to a file. If the file exists,
- * it will be atomically overwritten by the new data.
- *
- * @param str the string to write out
- * @param filename the file to save string to
- * @param error error to be filled in on failure
- * @returns #FALSE on failure
- */
-dbus_bool_t
-_dbus_string_save_to_file (const DBusString *str,
- const DBusString *filename,
- DBusError *error)
-{
- int fd;
- int bytes_to_write;
- const char *filename_c;
- DBusString tmp_filename;
- const char *tmp_filename_c;
- int total;
- dbus_bool_t need_unlink;
- dbus_bool_t retval;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- fd = -1;
- retval = FALSE;
- need_unlink = FALSE;
-
- if (!_dbus_string_init (&tmp_filename))
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- return FALSE;
- }
-
- if (!_dbus_string_copy (filename, 0, &tmp_filename, 0))
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- _dbus_string_free (&tmp_filename);
- return FALSE;
- }
-
- if (!_dbus_string_append (&tmp_filename, "."))
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- _dbus_string_free (&tmp_filename);
- return FALSE;
- }
-
-#define N_TMP_FILENAME_RANDOM_BYTES 8
- if (!_dbus_generate_random_ascii (&tmp_filename, N_TMP_FILENAME_RANDOM_BYTES))
- {
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
- _dbus_string_free (&tmp_filename);
- return FALSE;
- }
-
- filename_c = _dbus_string_get_const_data (filename);
- tmp_filename_c = _dbus_string_get_const_data (&tmp_filename);
-
- fd = open (tmp_filename_c, O_WRONLY | O_BINARY | O_EXCL | O_CREAT,
- 0600);
- if (fd < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Could not create %s: %s", tmp_filename_c,
- _dbus_strerror (errno));
- goto out;
- }
-
- need_unlink = TRUE;
-
- total = 0;
- bytes_to_write = _dbus_string_get_length (str);
-
- while (total < bytes_to_write)
- {
- int bytes_written;
-
- bytes_written = _dbus_write (fd, str, total,
- bytes_to_write - total);
-
- if (bytes_written <= 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Could not write to %s: %s", tmp_filename_c,
- _dbus_strerror (errno));
-
- goto out;
- }
-
- total += bytes_written;
- }
-
- if (close (fd) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Could not close file %s: %s",
- tmp_filename_c, _dbus_strerror (errno));
-
- goto out;
- }
-
- fd = -1;
-
- if (rename (tmp_filename_c, filename_c) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Could not rename %s to %s: %s",
- tmp_filename_c, filename_c,
- _dbus_strerror (errno));
-
- goto out;
- }
-
- need_unlink = FALSE;
-
- retval = TRUE;
-
- out:
- /* close first, then unlink, to prevent ".nfs34234235" garbage
- * files
- */
-
- if (fd >= 0)
- close (fd);
-
- if (need_unlink && unlink (tmp_filename_c) < 0)
- _dbus_verbose ("Failed to unlink temp file %s: %s\n",
- tmp_filename_c, _dbus_strerror (errno));
-
- _dbus_string_free (&tmp_filename);
-
- if (!retval)
- _DBUS_ASSERT_ERROR_IS_SET (error);
-
- return retval;
-}
-
-/** Creates the given file, failing if the file already exists.
- *
- * @param filename the filename
- * @param error error location
- * @returns #TRUE if we created the file and it didn't exist
- */
-dbus_bool_t
-_dbus_create_file_exclusively (const DBusString *filename,
- DBusError *error)
-{
- int fd;
- const char *filename_c;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- filename_c = _dbus_string_get_const_data (filename);
-
- fd = open (filename_c, O_WRONLY | O_BINARY | O_EXCL | O_CREAT,
- 0600);
- if (fd < 0)
- {
- dbus_set_error (error,
- DBUS_ERROR_FAILED,
- "Could not create file %s: %s\n",
- filename_c,
- _dbus_strerror (errno));
- return FALSE;
- }
-
- if (close (fd) < 0)
- {
- dbus_set_error (error,
- DBUS_ERROR_FAILED,
- "Could not close file %s: %s\n",
- filename_c,
- _dbus_strerror (errno));
- return FALSE;
- }
+ _dbus_string_shorten (str, MAX_LONG_LEN - i);
return TRUE;
}
/**
- * Deletes the given file.
- *
- * @param filename the filename
- * @param error error location
+ * Appends an unsigned integer to a DBusString.
*
- * @returns #TRUE if unlink() succeeded
+ * @param str the string
+ * @param value the integer value
+ * @returns #FALSE if not enough memory or other failure.
*/
dbus_bool_t
-_dbus_delete_file (const DBusString *filename,
- DBusError *error)
+_dbus_string_append_uint (DBusString *str,
+ unsigned long value)
{
- const char *filename_c;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+ /* this is wrong, but definitely on the high side. */
+#define MAX_ULONG_LEN (MAX_LONG_LEN * 2)
+ int orig_len;
+ int i;
+ char *buf;
- filename_c = _dbus_string_get_const_data (filename);
+ orig_len = _dbus_string_get_length (str);
+
+ if (!_dbus_string_lengthen (str, MAX_ULONG_LEN))
+ return FALSE;
+
+ buf = _dbus_string_get_data_len (str, orig_len, MAX_ULONG_LEN);
- if (unlink (filename_c) < 0)
+ snprintf (buf, MAX_ULONG_LEN, "%lu", value);
+
+ i = 0;
+ while (*buf)
{
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "Failed to delete file %s: %s\n",
- filename_c, _dbus_strerror (errno));
- return FALSE;
+ ++buf;
+ ++i;
}
- else
- return TRUE;
+
+ _dbus_string_shorten (str, MAX_ULONG_LEN - i);
+
+ return TRUE;
}
/**
- * Creates a directory; succeeds if the directory
- * is created or already existed.
+ * Parses an integer contained in a DBusString. Either return parameter
+ * may be #NULL if you aren't interested in it. The integer is parsed
+ * and stored in value_return. Return parameters are not initialized
+ * if the function returns #FALSE.
*
- * @param filename directory filename
- * @param error initialized error object
+ * @param str the string
+ * @param start the byte index of the start of the integer
+ * @param value_return return location of the integer value or #NULL
+ * @param end_return return location of the end of the integer, or #NULL
* @returns #TRUE on success
*/
dbus_bool_t
-_dbus_create_directory (const DBusString *filename,
- DBusError *error)
+_dbus_string_parse_int (const DBusString *str,
+ int start,
+ long *value_return,
+ int *end_return)
{
- const char *filename_c;
+ long v;
+ const char *p;
+ char *end;
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- filename_c = _dbus_string_get_const_data (filename);
+ p = _dbus_string_get_const_data_len (str, start,
+ _dbus_string_get_length (str) - start);
- if (mkdir (filename_c, 0700) < 0)
- {
- if (errno == EEXIST)
- return TRUE;
-
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "Failed to create directory %s: %s\n",
- filename_c, _dbus_strerror (errno));
- return FALSE;
- }
- else
- return TRUE;
+ end = NULL;
+ _dbus_set_errno_to_zero ();
+ v = strtol (p, &end, 0);
+ if (end == NULL || end == p || errno != 0)
+ return FALSE;
+
+ if (value_return)
+ *value_return = v;
+ if (end_return)
+ *end_return = start + (end - p);
+
+ return TRUE;
}
/**
- * Appends the given filename to the given directory.
- *
- * @todo it might be cute to collapse multiple '/' such as "foo//"
- * concat "//bar"
+ * Parses an unsigned integer contained in a DBusString. Either return
+ * parameter may be #NULL if you aren't interested in it. The integer
+ * is parsed and stored in value_return. Return parameters are not
+ * initialized if the function returns #FALSE.
*
- * @param dir the directory name
- * @param next_component the filename
+ * @param str the string
+ * @param start the byte index of the start of the integer
+ * @param value_return return location of the integer value or #NULL
+ * @param end_return return location of the end of the integer, or #NULL
* @returns #TRUE on success
*/
dbus_bool_t
-_dbus_concat_dir_and_file (DBusString *dir,
- const DBusString *next_component)
+_dbus_string_parse_uint (const DBusString *str,
+ int start,
+ unsigned long *value_return,
+ int *end_return)
{
- dbus_bool_t dir_ends_in_slash;
- dbus_bool_t file_starts_with_slash;
+ unsigned long v;
+ const char *p;
+ char *end;
- if (_dbus_string_get_length (dir) == 0 ||
- _dbus_string_get_length (next_component) == 0)
- return TRUE;
-
- dir_ends_in_slash = '/' == _dbus_string_get_byte (dir,
- _dbus_string_get_length (dir) - 1);
+ p = _dbus_string_get_const_data_len (str, start,
+ _dbus_string_get_length (str) - start);
- file_starts_with_slash = '/' == _dbus_string_get_byte (next_component, 0);
+ end = NULL;
+ _dbus_set_errno_to_zero ();
+ v = strtoul (p, &end, 0);
+ if (end == NULL || end == p || errno != 0)
+ return FALSE;
- if (dir_ends_in_slash && file_starts_with_slash)
- {
- _dbus_string_shorten (dir, 1);
- }
- else if (!(dir_ends_in_slash || file_starts_with_slash))
- {
- if (!_dbus_string_append_byte (dir, '/'))
- return FALSE;
- }
+ if (value_return)
+ *value_return = v;
+ if (end_return)
+ *end_return = start + (end - p);
- return _dbus_string_copy (next_component, 0, dir,
- _dbus_string_get_length (dir));
+ return TRUE;
}
-static void
-pseudorandom_generate_random_bytes_buffer (char *buffer,
- int n_bytes)
+/** @} */ /* DBusString group */
+
+/**
+ * @addtogroup DBusInternalsUtils
+ * @{
+ */
+
+void
+_dbus_generate_pseudorandom_bytes_buffer (char *buffer,
+ int n_bytes)
{
- unsigned long tv_usec;
+ long tv_usec;
int i;
/* fall back to pseudorandom */
_dbus_verbose ("Falling back to pseudorandom for %d bytes\n",
n_bytes);
- _dbus_get_current_time (NULL, &tv_usec);
+ _dbus_get_real_time (NULL, &tv_usec);
srand (tv_usec);
i = 0;
}
}
-static dbus_bool_t
-pseudorandom_generate_random_bytes (DBusString *str,
- int n_bytes)
-{
- int old_len;
- char *p;
-
- old_len = _dbus_string_get_length (str);
-
- if (!_dbus_string_lengthen (str, n_bytes))
- return FALSE;
-
- p = _dbus_string_get_data_len (str, old_len, n_bytes);
-
- pseudorandom_generate_random_bytes_buffer (p, n_bytes);
-
- return TRUE;
-}
-
/**
* Fills n_bytes of the given buffer with random bytes.
*
if (!_dbus_string_init (&str))
{
- pseudorandom_generate_random_bytes_buffer (buffer, n_bytes);
+ _dbus_generate_pseudorandom_bytes_buffer (buffer, n_bytes);
return;
}
if (!_dbus_generate_random_bytes (&str, n_bytes))
{
_dbus_string_free (&str);
- pseudorandom_generate_random_bytes_buffer (buffer, n_bytes);
+ _dbus_generate_pseudorandom_bytes_buffer (buffer, n_bytes);
return;
}
}
/**
- * Generates the given number of random bytes,
- * using the best mechanism we can come up with.
- *
- * @param str the string
- * @param n_bytes the number of random bytes to append to string
- * @returns #TRUE on success, #FALSE if no memory
- */
-dbus_bool_t
-_dbus_generate_random_bytes (DBusString *str,
- int n_bytes)
-{
- int old_len;
- int fd;
-
- /* FALSE return means "no memory", if it could
- * mean something else then we'd need to return
- * a DBusError. So we always fall back to pseudorandom
- * if the I/O fails.
- */
-
- old_len = _dbus_string_get_length (str);
- fd = -1;
-
- /* note, urandom on linux will fall back to pseudorandom */
- fd = open ("/dev/urandom", O_RDONLY);
- if (fd < 0)
- return pseudorandom_generate_random_bytes (str, n_bytes);
-
- if (_dbus_read (fd, str, n_bytes) != n_bytes)
- {
- close (fd);
- _dbus_string_set_length (str, old_len);
- return pseudorandom_generate_random_bytes (str, n_bytes);
- }
-
- _dbus_verbose ("Read %d bytes from /dev/urandom\n",
- n_bytes);
-
- close (fd);
-
- return TRUE;
-}
-
-/**
* Generates the given number of random bytes, where the bytes are
* chosen from the alphanumeric ASCII subset.
*
}
/**
- * A wrapper around strerror() because some platforms
- * may be lame and not have strerror().
- *
- * @param error_number errno.
- * @returns error description.
- */
-const char*
-_dbus_strerror (int error_number)
-{
- const char *msg;
-
- msg = strerror (error_number);
- if (msg == NULL)
- msg = "unknown";
-
- return msg;
-}
-
-/**
- * signal (SIGPIPE, SIG_IGN);
- */
-void
-_dbus_disable_sigpipe (void)
-{
- signal (SIGPIPE, SIG_IGN);
-}
-
-/**
- * Sets the file descriptor to be close
- * on exec. Should be called for all file
- * descriptors in D-Bus code.
- *
- * @param fd the file descriptor
- */
-void
-_dbus_fd_set_close_on_exec (int fd)
-{
- int val;
-
- val = fcntl (fd, F_GETFD, 0);
-
- if (val < 0)
- return;
-
- val |= FD_CLOEXEC;
-
- fcntl (fd, F_SETFD, val);
-}
-
-/**
- * Converts a UNIX errno into a #DBusError name.
+ * Converts a UNIX errno, or Windows errno or WinSock error value into
+ * a #DBusError name.
*
* @todo should cover more errnos, specifically those
* from open().
#ifdef EPROTONOSUPPORT
case EPROTONOSUPPORT:
return DBUS_ERROR_NOT_SUPPORTED;
+#elif defined(WSAEPROTONOSUPPORT)
+ case WSAEPROTONOSUPPORT:
+ return DBUS_ERROR_NOT_SUPPORTED;
#endif
#ifdef EAFNOSUPPORT
case EAFNOSUPPORT:
return DBUS_ERROR_NOT_SUPPORTED;
+#elif defined(WSAEAFNOSUPPORT)
+ case WSAEAFNOSUPPORT:
+ return DBUS_ERROR_NOT_SUPPORTED;
#endif
#ifdef ENFILE
case ENFILE:
case ENOMEM:
return DBUS_ERROR_NO_MEMORY;
#endif
-#ifdef EINVAL
- case EINVAL:
- return DBUS_ERROR_FAILED;
-#endif
-#ifdef EBADF
- case EBADF:
- return DBUS_ERROR_FAILED;
-#endif
-#ifdef EFAULT
- case EFAULT:
- return DBUS_ERROR_FAILED;
-#endif
-#ifdef ENOTSOCK
- case ENOTSOCK:
- return DBUS_ERROR_FAILED;
-#endif
-#ifdef EISCONN
- case EISCONN:
- return DBUS_ERROR_FAILED;
-#endif
#ifdef ECONNREFUSED
case ECONNREFUSED:
return DBUS_ERROR_NO_SERVER;
+#elif defined(WSAECONNREFUSED)
+ case WSAECONNREFUSED:
+ return DBUS_ERROR_NO_SERVER;
#endif
#ifdef ETIMEDOUT
case ETIMEDOUT:
return DBUS_ERROR_TIMEOUT;
+#elif defined(WSAETIMEDOUT)
+ case WSAETIMEDOUT:
+ return DBUS_ERROR_TIMEOUT;
#endif
#ifdef ENETUNREACH
case ENETUNREACH:
return DBUS_ERROR_NO_NETWORK;
+#elif defined(WSAENETUNREACH)
+ case WSAENETUNREACH:
+ return DBUS_ERROR_NO_NETWORK;
#endif
#ifdef EADDRINUSE
case EADDRINUSE:
return DBUS_ERROR_ADDRESS_IN_USE;
+#elif defined(WSAEADDRINUSE)
+ case WSAEADDRINUSE:
+ return DBUS_ERROR_ADDRESS_IN_USE;
#endif
#ifdef EEXIST
case EEXIST:
- return DBUS_ERROR_FILE_NOT_FOUND;
+ return DBUS_ERROR_FILE_EXISTS;
#endif
#ifdef ENOENT
case ENOENT:
}
/**
- * Exit the process, returning the given value.
+ * Converts the current system errno value into a #DBusError name.
*
- * @param code the exit code
+ * @returns an error name
*/
-void
-_dbus_exit (int code)
+const char*
+_dbus_error_from_system_errno (void)
{
- _exit (code);
+ return _dbus_error_from_errno (errno);
}
/**
- * Closes a file descriptor.
- *
- * @param fd the file descriptor
- * @param error error object
- * @returns #FALSE if error set
+ * Assign 0 to the global errno variable
*/
-dbus_bool_t
-_dbus_close (int fd,
- DBusError *error)
+void
+_dbus_set_errno_to_zero (void)
{
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- again:
- if (close (fd) < 0)
- {
- if (errno == EINTR)
- goto again;
-
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Could not close fd %d", fd);
- return FALSE;
- }
-
- return TRUE;
+#ifdef DBUS_WINCE
+ SetLastError (0);
+#else
+ errno = 0;
+#endif
}
/**
- * Sets a file descriptor to be nonblocking.
- *
- * @param fd the file descriptor.
- * @param error address of error location.
- * @returns #TRUE on success.
+ * See if errno is set
+ * @returns #TRUE if errno is not 0
*/
dbus_bool_t
-_dbus_set_fd_nonblocking (int fd,
- DBusError *error)
+_dbus_get_is_errno_nonzero (void)
{
- int val;
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- val = fcntl (fd, F_GETFL, 0);
- if (val < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to get flags from file descriptor %d: %s",
- fd, _dbus_strerror (errno));
- _dbus_verbose ("Failed to get flags for fd %d: %s\n", fd,
- _dbus_strerror (errno));
- return FALSE;
- }
-
- if (fcntl (fd, F_SETFL, val | O_NONBLOCK) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Failed to set nonblocking flag of file descriptor %d: %s",
- fd, _dbus_strerror (errno));
- _dbus_verbose ("Failed to set fd %d nonblocking: %s\n",
- fd, _dbus_strerror (errno));
-
- return FALSE;
- }
-
- return TRUE;
+ return errno != 0;
}
-#if !defined (DBUS_DISABLE_ASSERT) || defined(DBUS_BUILD_TESTS)
/**
- * On GNU libc systems, print a crude backtrace to the verbose log.
- * On other systems, print "no backtrace support"
- *
+ * See if errno is ENOMEM
+ * @returns #TRUE if errno == ENOMEM
*/
-void
-_dbus_print_backtrace (void)
+dbus_bool_t
+_dbus_get_is_errno_enomem (void)
{
-#if defined (HAVE_BACKTRACE) && defined (DBUS_ENABLE_VERBOSE_MODE)
- void *bt[500];
- int bt_size;
- int i;
- char **syms;
-
- bt_size = backtrace (bt, 500);
-
- syms = backtrace_symbols (bt, bt_size);
-
- i = 0;
- while (i < bt_size)
- {
- _dbus_verbose (" %s\n", syms[i]);
- ++i;
- }
-
- free (syms);
-#else
- _dbus_verbose (" D-Bus not compiled with backtrace support\n");
-#endif
+ return errno == ENOMEM;
}
-#endif /* asserts or tests enabled */
-
/**
- * Gets a UID from a UID string.
- *
- * @param uid_str the UID in string form
- * @param uid UID to fill in
- * @returns #TRUE if successfully filled in UID
+ * See if errno is EINTR
+ * @returns #TRUE if errno == EINTR
*/
dbus_bool_t
-_dbus_parse_uid (const DBusString *uid_str,
- dbus_uid_t *uid)
+_dbus_get_is_errno_eintr (void)
{
- int end;
- long val;
-
- if (_dbus_string_get_length (uid_str) == 0)
- {
- _dbus_verbose ("UID string was zero length\n");
- return FALSE;
- }
-
- val = -1;
- end = 0;
- if (!_dbus_string_parse_int (uid_str, 0, &val,
- &end))
- {
- _dbus_verbose ("could not parse string as a UID\n");
- return FALSE;
- }
-
- if (end != _dbus_string_get_length (uid_str))
- {
- _dbus_verbose ("string contained trailing stuff after UID\n");
- return FALSE;
- }
-
- *uid = val;
-
- return TRUE;
+ return errno == EINTR;
}
/**
- * Creates a full-duplex pipe (as in socketpair()).
- * Sets both ends of the pipe nonblocking.
- *
- * @todo libdbus only uses this for the debug-pipe server, so in
- * principle it could be in dbus-sysdeps-util.c, except that
- * dbus-sysdeps-util.c isn't in libdbus when tests are enabled and the
- * debug-pipe server is used.
- *
- * @param fd1 return location for one end
- * @param fd2 return location for the other end
- * @param blocking #TRUE if pipe should be blocking
- * @param error error return
- * @returns #FALSE on failure (if error is set)
+ * See if errno is EPIPE
+ * @returns #TRUE if errno == EPIPE
*/
dbus_bool_t
-_dbus_full_duplex_pipe (int *fd1,
- int *fd2,
- dbus_bool_t blocking,
- DBusError *error)
+_dbus_get_is_errno_epipe (void)
{
-#ifdef HAVE_SOCKETPAIR
- int fds[2];
-
- _DBUS_ASSERT_ERROR_IS_CLEAR (error);
-
- if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) < 0)
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Could not create full-duplex pipe");
- return FALSE;
- }
-
- if (!blocking &&
- (!_dbus_set_fd_nonblocking (fds[0], NULL) ||
- !_dbus_set_fd_nonblocking (fds[1], NULL)))
- {
- dbus_set_error (error, _dbus_error_from_errno (errno),
- "Could not set full-duplex pipe nonblocking");
-
- close (fds[0]);
- close (fds[1]);
-
- return FALSE;
- }
-
- *fd1 = fds[0];
- *fd2 = fds[1];
-
- _dbus_verbose ("full-duplex pipe %d <-> %d\n",
- *fd1, *fd2);
-
- return TRUE;
-#else
- _dbus_warn ("_dbus_full_duplex_pipe() not implemented on this OS\n");
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "_dbus_full_duplex_pipe() not implemented on this OS");
- return FALSE;
-#endif
+ return errno == EPIPE;
}
-
-#ifndef DBUS_WIN
/**
- * Measure the message length without terminating nul
+ * Get error message from errno
+ * @returns _dbus_strerror(errno)
*/
-int _dbus_printf_length (const char *format,
- va_list args)
+const char*
+_dbus_strerror_from_errno (void)
{
- char c;
- return vsnprintf (&c, 1, format, args);
+ return _dbus_strerror (errno);
}
-#endif
-
-
/** @} end of sysdeps */
projects / platform / upstream / dbus.git / blobdiff