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scd: New sub-command cmd_has_option for GETINFO.

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* scd/command.c (cmd_getinfo): Add cmd_has_option sub-command.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2019-09-04 13:50:12 +02:00
parent 9a0d8f2d89
commit fed9c93e05
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
1 changed files with 55 additions and 1 deletions
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56
scd/command.c
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@ -105,6 +105,12 @@ static struct server_local_s *session_list;
in this variable. */
static struct server_local_s *locked_session;
/* Local prototypes. */
static int command_has_option (const char *cmd, const char *cmdopt);
/* Convert the STRING into a newly allocated buffer while translating
the hex numbers. Stops at the first invalid character. Blanks and
@ -1573,7 +1579,9 @@ static const char hlp_getinfo[] =
" application per line, fields delimited by colons,\n"
" first field is the name.\n"
" card_list - Return a list of serial numbers of active cards,\n"
" using a status response.";
" using a status response.\n"
" cmd_has_option CMD OPT\n"
" - Returns OK if command CMD has option OPT.\n";
static gpg_error_t
cmd_getinfo (assuan_context_t ctx, char *line)
{
@ -1591,6 +1599,38 @@ cmd_getinfo (assuan_context_t ctx, char *line)
snprintf (numbuf, sizeof numbuf, "%lu", (unsigned long)getpid ());
rc = assuan_send_data (ctx, numbuf, strlen (numbuf));
}
else if (!strncmp (line, "cmd_has_option", 14)
&& (line[14] == ' ' || line[14] == '\t' || !line[14]))
{
char *cmd, *cmdopt;
line += 14;
while (*line == ' ' || *line == '\t')
line++;
if (!*line)
rc = gpg_error (GPG_ERR_MISSING_VALUE);
else
{
cmd = line;
while (*line && (*line != ' ' && *line != '\t'))
line++;
if (!*line)
rc = gpg_error (GPG_ERR_MISSING_VALUE);
else
{
*line++ = 0;
while (*line == ' ' || *line == '\t')
line++;
if (!*line)
rc = gpg_error (GPG_ERR_MISSING_VALUE);
else
{
cmdopt = line;
if (!command_has_option (cmd, cmdopt))
rc = gpg_error (GPG_ERR_FALSE);
}
}
}
}
else if (!strcmp (line, "socket_name"))
{
const char *s = scd_get_socket_name ();
@ -1934,6 +1974,20 @@ send_keyinfo (ctrl_t ctrl, int data, const char *keygrip_str,
/* Return true if the command CMD implements the option OPT. */
static int
command_has_option (const char *cmd, const char *cmdopt)
{
if (!strcmp (cmd, "SERIALNO"))
{
if (!strcmp (cmdopt, "all"))
return 1;
}
return 0;
}
/* Tell the assuan library about our commands */
static int
register_commands (assuan_context_t ctx)