security-and-privacy/gnupg
security-and-privacy/gnupg
1
0
Fork 0
mirror of git://git.gnupg.org/gnupg.git synced 2025-07-03 22:56:33 +02:00
Code Activity

Collected changes

Browse source
This commit is contained in:
Werner Koch 2010-05-03 11:10:49 +00:00
parent 1dfd0e0eda
commit 830af45ca2
10 changed files with 129 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

5
common/ChangeLog
View file

@ -1,3 +1,8 @@
2010-03-17 Werner Koch <wk@g10code.com>
* asshelp.c (start_new_gpg_agent) [W32]: Use a named mutex to
avoid starting two agents.
2010-03-12 Werner Koch <wk@g10code.com>
* status.h (STATUS_ENTER): New.

63
common/asshelp.c
View file

@ -231,25 +231,68 @@ start_new_gpg_agent (assuan_context_t *r_ctx,
and thus there is no need for the GPG_AGENT_INFO
envvar. This is possible as we don't have a real unix
domain socket but use a plain file and thus there is no
need to care about non-local file systems. */
need to care about non-local file systems. We use a
named mutex to interlock the spawning. There is just
one problem with that: If gpg-agent needs more than 3
seconds to come up and listen on the socket we might
still spawn another agent. However this is no serious
problem because an agent detects this and handles it.
Thus the mutex merely helps to save resources in the
most common cases. */
const char *argv[3];
HANDLE mutex;
int waitrc;
argv[0] = "--daemon";
argv[1] = "--use-standard-socket";
argv[2] = NULL;
rc = gnupg_spawn_process_detached (agent_program, argv, NULL);
if (rc)
log_debug ("failed to start agent `%s': %s\n",
agent_program, gpg_strerror (rc));
mutex = CreateMutex (NULL, FALSE, "GnuPG_spawn_agent_sentinel");
if (!mutex)
{
log_error ("failed to create the spawn_agent mutex: %s\n",
w32_strerror (-1));
rc = gpg_error (GPG_ERR_GENERAL);
}
else if ((waitrc = WaitForSingleObject (mutex, 5000))
== WAIT_OBJECT_0)
{
rc = assuan_socket_connect (&ctx, sockname, 0);
if (rc)
{
/* Still not available. */
rc = gnupg_spawn_process_detached (agent_program,
argv, NULL);
if (rc)
log_debug ("failed to start agent `%s': %s\n",
agent_program, gpg_strerror (rc));
else
{
/* Give the agent some time to prepare itself. */
gnupg_sleep (3);
/* Now try again to connect the agent. */
rc = assuan_socket_connect (&ctx, sockname, 0);
}
}
if (!ReleaseMutex (mutex))
log_error ("failed to release the spawn_agent mutex: %s\n",
w32_strerror (-1));
}
else if (waitrc == WAIT_TIMEOUT)
{
log_info ("error waiting for the spawn_agent mutex: timeout\n");
rc = gpg_error (GPG_ERR_GENERAL);
}
else
{
/* Give the agent some time to prepare itself. */
gnupg_sleep (3);
/* Now try again to connect the agent. */
rc = assuan_socket_connect (ctx, sockname, 0, 0);
log_debug ("error waiting for the spawn_agent mutex: "
"(code=%d) %s\n", waitrc, w32_strerror (-1));
rc = gpg_error (GPG_ERR_GENERAL);
}
}
if (mutex)
CloseHandle (mutex);
}
#else /*!HAVE_W32_SYSTEM*/
{
const char *pgmname;