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g13: New command --find-device.

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* common/status.h (STATUS_BLOCKDEV: New.
* g13/call-syshelp.c: Include "call-syshelp.h".
(finddevice_status_cb, call_syshelp_find_device): New.
* g13/g13.c (aFindDevice): New.
(opts): Add "--find-device".
(main): Implement --find-device.
* g13/sh-cmd.c (cmd_finddevice): New.
(register_commands): Register new command.
--

This might be useful for scripting.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2016-08-13 12:49:54 +02:00
parent 3a75ff65fb
commit b57f553212
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
5 changed files with 162 additions and 0 deletions
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63
g13/call-syshelp.c
View file

@ -33,6 +33,7 @@
#include "keyblob.h"
#include "membuf.h"
#include "create.h"
#include "call-syshelp.h"
/* Local data for this module. A pointer to this is stored in the
@ -172,6 +173,68 @@ call_syshelp_release (ctrl_t ctrl)
}
/* Staus callback for call_syshelp_find_device. */
static gpg_error_t
finddevice_status_cb (void *opaque, const char *line)
{
char **r_blockdev = opaque;
char *p;
if ((p = has_leading_keyword (line, "BLOCKDEV")) && *p && !*r_blockdev)
{
*r_blockdev = xtrystrdup (p);
if (!*r_blockdev)
return gpg_error_from_syserror ();
}
return 0;
}
/* Send the FINDDEVICE command to the syshelper. On success the name
* of the block device is stored at R_BLOCKDEV. */
gpg_error_t
call_syshelp_find_device (ctrl_t ctrl, const char *name, char **r_blockdev)
{
gpg_error_t err;
assuan_context_t ctx;
char *line = NULL;
char *blockdev = NULL; /* The result. */
*r_blockdev = NULL;
err = start_syshelp (ctrl, &ctx);
if (err)
goto leave;
line = xtryasprintf ("FINDDEVICE %s", name);
if (!line)
{
err = gpg_error_from_syserror ();
goto leave;
}
err = assuan_transact (ctx, line, NULL, NULL, NULL, NULL,
finddevice_status_cb, &blockdev);
if (err)
goto leave;
if (!blockdev)
{
log_error ("status line for successful FINDDEVICE missing\n");
err = gpg_error (GPG_ERR_UNEXPECTED);
goto leave;
}
*r_blockdev = blockdev;
blockdev = NULL;
leave:
xfree (blockdev);
xfree (line);
return err;
}
/* Send the DEVICE command to the syshelper. FNAME is the name of the
device. */
gpg_error_t