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gnupg/g10/status.c
Werner Koch 14296f338f * status.c (do_get_from_fd, do_shm_get): s/bool/getbool/ to 
overcome problems with Mac OS 10.5 which seems to include
   stdbool.h silently.
2007-11-12 15:52:01 +00:00

790 lines
21 KiB
C
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/* status.c
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003,
* 2004, 2005 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#ifdef USE_SHM_COPROCESSING
#ifdef USE_CAPABILITIES
#include <sys/capability.h>
#endif
#ifdef HAVE_SYS_IPC_H
#include <sys/types.h>
#include <sys/ipc.h>
#endif
#ifdef HAVE_SYS_SHM_H
#include <sys/shm.h>
#endif
#if defined(HAVE_MLOCK)
#include <sys/mman.h>
#endif
#endif
#include "util.h"
#include "status.h"
#include "ttyio.h"
#include "options.h"
#include "main.h"
#include "i18n.h"
#include "cipher.h" /* for progress functions */
#define CONTROL_D ('D' - 'A' + 1)
static FILE *statusfp;
#ifdef USE_SHM_COPROCESSING
static int shm_id = -1;
static volatile char *shm_area;
static size_t shm_size;
static int shm_is_locked;
#endif /*USE_SHM_COPROCESSING*/
static void
progress_cb ( void *ctx, int c )
{
char buf[50];
if ( c == '\n' )
sprintf ( buf, "%.20s X 100 100", (char*)ctx );
else
sprintf ( buf, "%.20s %c 0 0", (char*)ctx, c );
write_status_text ( STATUS_PROGRESS, buf );
}
static const char *
get_status_string ( int no )
{
const char *s;
switch( no )
{
case STATUS_ENTER : s = "ENTER"; break;
case STATUS_LEAVE : s = "LEAVE"; break;
case STATUS_ABORT : s = "ABORT"; break;
case STATUS_NEWSIG : s = "NEWSIG"; break;
case STATUS_GOODSIG: s = "GOODSIG"; break;
case STATUS_KEYEXPIRED: s = "KEYEXPIRED"; break;
case STATUS_KEYREVOKED: s = "KEYREVOKED"; break;
case STATUS_BADSIG : s = "BADSIG"; break;
case STATUS_ERRSIG : s = "ERRSIG"; break;
case STATUS_BADARMOR : s = "BADARMOR"; break;
case STATUS_RSA_OR_IDEA : s= "RSA_OR_IDEA"; break;
case STATUS_TRUST_UNDEFINED: s = "TRUST_UNDEFINED"; break;
case STATUS_TRUST_NEVER : s = "TRUST_NEVER"; break;
case STATUS_TRUST_MARGINAL : s = "TRUST_MARGINAL"; break;
case STATUS_TRUST_FULLY : s = "TRUST_FULLY"; break;
case STATUS_TRUST_ULTIMATE : s = "TRUST_ULTIMATE"; break;
case STATUS_GET_BOOL : s = "GET_BOOL"; break;
case STATUS_GET_LINE : s = "GET_LINE"; break;
case STATUS_GET_HIDDEN : s = "GET_HIDDEN"; break;
case STATUS_GOT_IT : s = "GOT_IT"; break;
case STATUS_SHM_INFO : s = "SHM_INFO"; break;
case STATUS_SHM_GET : s = "SHM_GET"; break;
case STATUS_SHM_GET_BOOL : s = "SHM_GET_BOOL"; break;
case STATUS_SHM_GET_HIDDEN : s = "SHM_GET_HIDDEN"; break;
case STATUS_NEED_PASSPHRASE: s = "NEED_PASSPHRASE"; break;
case STATUS_VALIDSIG : s = "VALIDSIG"; break;
case STATUS_SIG_ID : s = "SIG_ID"; break;
case STATUS_ENC_TO : s = "ENC_TO"; break;
case STATUS_NODATA : s = "NODATA"; break;
case STATUS_BAD_PASSPHRASE : s = "BAD_PASSPHRASE"; break;
case STATUS_NO_PUBKEY : s = "NO_PUBKEY"; break;
case STATUS_NO_SECKEY : s = "NO_SECKEY"; break;
case STATUS_NEED_PASSPHRASE_SYM: s = "NEED_PASSPHRASE_SYM"; break;
case STATUS_NEED_PASSPHRASE_PIN: s = "NEED_PASSPHRASE_PIN"; break;
case STATUS_DECRYPTION_FAILED: s = "DECRYPTION_FAILED"; break;
case STATUS_DECRYPTION_OKAY: s = "DECRYPTION_OKAY"; break;
case STATUS_MISSING_PASSPHRASE: s = "MISSING_PASSPHRASE"; break;
case STATUS_GOOD_PASSPHRASE : s = "GOOD_PASSPHRASE"; break;
case STATUS_GOODMDC : s = "GOODMDC"; break;
case STATUS_BADMDC : s = "BADMDC"; break;
case STATUS_ERRMDC : s = "ERRMDC"; break;
case STATUS_IMPORTED : s = "IMPORTED"; break;
case STATUS_IMPORT_OK : s = "IMPORT_OK"; break;
case STATUS_IMPORT_CHECK : s = "IMPORT_CHECK"; break;
case STATUS_IMPORT_RES : s = "IMPORT_RES"; break;
case STATUS_FILE_START : s = "FILE_START"; break;
case STATUS_FILE_DONE : s = "FILE_DONE"; break;
case STATUS_FILE_ERROR : s = "FILE_ERROR"; break;
case STATUS_BEGIN_DECRYPTION:s = "BEGIN_DECRYPTION"; break;
case STATUS_END_DECRYPTION : s = "END_DECRYPTION"; break;
case STATUS_BEGIN_ENCRYPTION:s = "BEGIN_ENCRYPTION"; break;
case STATUS_END_ENCRYPTION : s = "END_ENCRYPTION"; break;
case STATUS_DELETE_PROBLEM : s = "DELETE_PROBLEM"; break;
case STATUS_PROGRESS : s = "PROGRESS"; break;
case STATUS_SIG_CREATED : s = "SIG_CREATED"; break;
case STATUS_SESSION_KEY : s = "SESSION_KEY"; break;
case STATUS_NOTATION_NAME : s = "NOTATION_NAME" ; break;
case STATUS_NOTATION_DATA : s = "NOTATION_DATA" ; break;
case STATUS_POLICY_URL : s = "POLICY_URL" ; break;
case STATUS_BEGIN_STREAM : s = "BEGIN_STREAM"; break;
case STATUS_END_STREAM : s = "END_STREAM"; break;
case STATUS_KEY_CREATED : s = "KEY_CREATED"; break;
case STATUS_KEY_NOT_CREATED: s = "KEY_NOT_CREATED"; break;
case STATUS_USERID_HINT : s = "USERID_HINT"; break;
case STATUS_UNEXPECTED : s = "UNEXPECTED"; break;
case STATUS_INV_RECP : s = "INV_RECP"; break;
case STATUS_NO_RECP : s = "NO_RECP"; break;
case STATUS_ALREADY_SIGNED : s = "ALREADY_SIGNED"; break;
case STATUS_SIGEXPIRED : s = "SIGEXPIRED deprecated-use-keyexpired-instead"; break;
case STATUS_EXPSIG : s = "EXPSIG"; break;
case STATUS_EXPKEYSIG : s = "EXPKEYSIG"; break;
case STATUS_REVKEYSIG : s = "REVKEYSIG"; break;
case STATUS_ATTRIBUTE : s = "ATTRIBUTE"; break;
case STATUS_CARDCTRL : s = "CARDCTRL"; break;
case STATUS_PLAINTEXT : s = "PLAINTEXT"; break;
case STATUS_PLAINTEXT_LENGTH:s = "PLAINTEXT_LENGTH"; break;
case STATUS_SIG_SUBPACKET : s = "SIG_SUBPACKET"; break;
case STATUS_SC_OP_SUCCESS : s = "SC_OP_SUCCESS"; break;
case STATUS_SC_OP_FAILURE : s = "SC_OP_FAILURE"; break;
case STATUS_BACKUP_KEY_CREATED:s="BACKUP_KEY_CREATED"; break;
case STATUS_PKA_TRUST_BAD : s = "PKA_TRUST_BAD"; break;
case STATUS_PKA_TRUST_GOOD : s = "PKA_TRUST_GOOD"; break;
case STATUS_BEGIN_SIGNING : s = "BEGIN_SIGNING"; break;
case STATUS_ERROR : s = "ERROR"; break;
default: s = "?"; break;
}
return s;
}
/* Return true if the status message NO may currently be issued. We
need this to avoid syncronisation problem while auto retrieving a
key. There it may happen that a status NODATA is issued for a non
available key and the user may falsely interpret this has a missing
signature. */
static int
status_currently_allowed (int no)
{
if (!glo_ctrl.in_auto_key_retrieve)
return 1; /* Yes. */
/* We allow some statis anyway, so that import statistics are
correct and to avoid problems if the retriebval subsystem will
prompt the user. */
switch (no)
{
case STATUS_GET_BOOL:
case STATUS_GET_LINE:
case STATUS_GET_HIDDEN:
case STATUS_GOT_IT:
case STATUS_IMPORTED:
case STATUS_IMPORT_OK:
case STATUS_IMPORT_CHECK:
case STATUS_IMPORT_RES:
return 1; /* Yes. */
default:
break;
}
return 0; /* No. */
}
void
set_status_fd ( int fd )
{
static int last_fd = -1;
if ( fd != -1 && last_fd == fd )
return;
if ( statusfp && statusfp != stdout && statusfp != stderr )
fclose (statusfp);
statusfp = NULL;
if ( fd == -1 )
return;
if( fd == 1 )
statusfp = stdout;
else if( fd == 2 )
statusfp = stderr;
else
statusfp = fdopen( fd, "w" );
if( !statusfp ) {
log_fatal("can't open fd %d for status output: %s\n",
fd, strerror(errno));
}
last_fd = fd;
register_primegen_progress ( progress_cb, "primegen" );
register_pk_dsa_progress ( progress_cb, "pk_dsa" );
register_pk_elg_progress ( progress_cb, "pk_elg" );
}
int
is_status_enabled()
{
return !!statusfp;
}
void
write_status ( int no )
{
write_status_text( no, NULL );
}
void
write_status_text ( int no, const char *text)
{
if( !statusfp || !status_currently_allowed (no) )
return; /* Not enabled or allowed. */
fputs ( "[GNUPG:] ", statusfp );
fputs ( get_status_string (no), statusfp );
if( text ) {
putc ( ' ', statusfp );
for (; *text; text++) {
if (*text == '\n')
fputs ( "\\n", statusfp );
else if (*text == '\r')
fputs ( "\\r", statusfp );
else
putc ( *(const byte *)text, statusfp );
}
}
putc ('\n',statusfp);
if ( fflush (statusfp) && opt.exit_on_status_write_error )
g10_exit (0);
}
/*
* Write a status line with a buffer using %XX escapes. If WRAP is >
* 0 wrap the line after this length. If STRING is not NULL it will
* be prepended to the buffer, no escaping is done for string.
* A wrap of -1 forces spaces not to be encoded as %20.
*/
void
write_status_text_and_buffer ( int no, const char *string,
const char *buffer, size_t len, int wrap )
{
const char *s, *text;
int esc, first;
int lower_limit = ' ';
size_t n, count, dowrap;
if( !statusfp || !status_currently_allowed (no) )
return; /* Not enabled or allowed. */
if (wrap == -1) {
lower_limit--;
wrap = 0;
}
text = get_status_string (no);
count = dowrap = first = 1;
do {
if (dowrap) {
fprintf (statusfp, "[GNUPG:] %s ", text );
count = dowrap = 0;
if (first && string) {
fputs (string, statusfp);
count += strlen (string);
}
first = 0;
}
for (esc=0, s=buffer, n=len; n && !esc; s++, n-- ) {
if ( *s == '%' || *(const byte*)s <= lower_limit
|| *(const byte*)s == 127 )
esc = 1;
if ( wrap && ++count > wrap ) {
dowrap=1;
break;
}
}
if (esc) {
s--; n++;
}
if (s != buffer)
fwrite (buffer, s-buffer, 1, statusfp );
if ( esc ) {
fprintf (statusfp, "%%%02X", *(const byte*)s );
s++; n--;
}
buffer = s;
len = n;
if ( dowrap && len )
putc ( '\n', statusfp );
} while ( len );
putc ('\n',statusfp);
if ( fflush (statusfp) && opt.exit_on_status_write_error )
g10_exit (0);
}
void
write_status_buffer ( int no, const char *buffer, size_t len, int wrap )
{
write_status_text_and_buffer (no, NULL, buffer, len, wrap);
}
#ifdef USE_SHM_COPROCESSING
#ifndef IPC_RMID_DEFERRED_RELEASE
static void
remove_shmid( void )
{
if( shm_id != -1 ) {
shmctl ( shm_id, IPC_RMID, 0);
shm_id = -1;
}
}
#endif
void
init_shm_coprocessing ( ulong requested_shm_size, int lock_mem )
{
char buf[100];
struct shmid_ds shmds;
#ifndef IPC_RMID_DEFERRED_RELEASE
atexit( remove_shmid );
#endif
requested_shm_size = (requested_shm_size + 4095) & ~4095;
if ( requested_shm_size > 2 * 4096 )
log_fatal("too much shared memory requested; only 8k are allowed\n");
shm_size = 4096 /* one page for us */ + requested_shm_size;
shm_id = shmget( IPC_PRIVATE, shm_size, IPC_CREAT | 0700 );
if ( shm_id == -1 )
log_fatal("can't get %uk of shared memory: %s\n",
(unsigned)shm_size/1024, strerror(errno));
#if !defined(IPC_HAVE_SHM_LOCK) \
&& defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
/* part of the old code which uses mlock */
shm_area = shmat( shm_id, 0, 0 );
if ( shm_area == (char*)-1 )
log_fatal("can't attach %uk shared memory: %s\n",
(unsigned)shm_size/1024, strerror(errno));
log_debug("mapped %uk shared memory at %p, id=%d\n",
(unsigned)shm_size/1024, shm_area, shm_id );
if( lock_mem ) {
#ifdef USE_CAPABILITIES
cap_set_proc( cap_from_text("cap_ipc_lock+ep") );
#endif
/* (need the cast for Solaris with Sun's workshop compilers) */
if ( mlock ( (char*)shm_area, shm_size) )
log_info("locking shared memory %d failed: %s\n",
shm_id, strerror(errno));
else
shm_is_locked = 1;
#ifdef USE_CAPABILITIES
cap_set_proc( cap_from_text("cap_ipc_lock+p") );
#endif
}
#ifdef IPC_RMID_DEFERRED_RELEASE
if( shmctl( shm_id, IPC_RMID, 0) )
log_fatal("shmctl IPC_RMDID of %d failed: %s\n",
shm_id, strerror(errno));
#endif
if( shmctl( shm_id, IPC_STAT, &shmds ) )
log_fatal("shmctl IPC_STAT of %d failed: %s\n",
shm_id, strerror(errno));
if( shmds.shm_perm.uid != getuid() ) {
shmds.shm_perm.uid = getuid();
if( shmctl( shm_id, IPC_SET, &shmds ) )
log_fatal("shmctl IPC_SET of %d failed: %s\n",
shm_id, strerror(errno));
}
#else /* this is the new code which handles the changes in the SHM
* semantics introduced with Linux 2.4. The changes is that we
* now change the permissions and then attach to the memory.
*/
if( lock_mem ) {
#ifdef USE_CAPABILITIES
cap_set_proc( cap_from_text("cap_ipc_lock+ep") );
#endif
#ifdef IPC_HAVE_SHM_LOCK
if ( shmctl (shm_id, SHM_LOCK, 0) )
log_info("locking shared memory %d failed: %s\n",
shm_id, strerror(errno));
else
shm_is_locked = 1;
#else
log_info("Locking shared memory %d failed: No way to do it\n", shm_id );
#endif
#ifdef USE_CAPABILITIES
cap_set_proc( cap_from_text("cap_ipc_lock+p") );
#endif
}
if( shmctl( shm_id, IPC_STAT, &shmds ) )
log_fatal("shmctl IPC_STAT of %d failed: %s\n",
shm_id, strerror(errno));
if( shmds.shm_perm.uid != getuid() ) {
shmds.shm_perm.uid = getuid();
if( shmctl( shm_id, IPC_SET, &shmds ) )
log_fatal("shmctl IPC_SET of %d failed: %s\n",
shm_id, strerror(errno));
}
shm_area = shmat( shm_id, 0, 0 );
if ( shm_area == (char*)-1 )
log_fatal("can't attach %uk shared memory: %s\n",
(unsigned)shm_size/1024, strerror(errno));
log_debug("mapped %uk shared memory at %p, id=%d\n",
(unsigned)shm_size/1024, shm_area, shm_id );
#ifdef IPC_RMID_DEFERRED_RELEASE
if( shmctl( shm_id, IPC_RMID, 0) )
log_fatal("shmctl IPC_RMDID of %d failed: %s\n",
shm_id, strerror(errno));
#endif
#endif
/* write info; Protocol version, id, size, locked size */
sprintf( buf, "pv=1 pid=%d shmid=%d sz=%u lz=%u", (int)getpid(),
shm_id, (unsigned)shm_size, shm_is_locked? (unsigned)shm_size:0 );
write_status_text( STATUS_SHM_INFO, buf );
}
/****************
* Request a string from client
* If GETBOOL, returns static string on true (do not free) or NULL for false
*/
static char *
do_shm_get( const char *keyword, int hidden, int getbool )
{
size_t n;
byte *p;
char *string;
if( !shm_area )
BUG();
shm_area[0] = 0; /* msb of length of control block */
shm_area[1] = 32; /* and lsb */
shm_area[2] = 1; /* indicate that we are waiting on a reply */
shm_area[3] = 0; /* clear data available flag */
write_status_text( getbool? STATUS_SHM_GET_BOOL :
hidden? STATUS_SHM_GET_HIDDEN : STATUS_SHM_GET, keyword );
do {
pause_on_sigusr(1);
if( shm_area[0] || shm_area[1] != 32 || shm_area[2] != 1 )
log_fatal("client modified shm control block - abort\n");
} while( !shm_area[3] );
shm_area[2] = 0; /* reset request flag */
p = (byte*)shm_area+32;
n = p[0] << 8 | p[1];
p += 2;
if( n+32+2+1 > 4095 )
log_fatal("client returns too large data (%u bytes)\n", (unsigned)n );
if( getbool )
return p[0]? "" : NULL;
string = hidden? xmalloc_secure( n+1 ) : xmalloc( n+1 );
memcpy(string, p, n );
string[n] = 0; /* make sure it is a string */
if( hidden ) /* invalidate the memory */
memset( p, 0, n );
return string;
}
#endif /* USE_SHM_COPROCESSING */
static int
myread(int fd, void *buf, size_t count)
{
int rc;
do {
rc = read( fd, buf, count );
} while ( rc == -1 && errno == EINTR );
if ( !rc && count ) {
static int eof_emmited=0;
if ( eof_emmited < 3 ) {
*(char*)buf = CONTROL_D;
rc = 1;
eof_emmited++;
}
else { /* Ctrl-D not caught - do something reasonable */
#ifdef HAVE_DOSISH_SYSTEM
raise (SIGINT); /* nothing to hangup under DOS */
#else
raise (SIGHUP); /* no more input data */
#endif
}
}
return rc;
}
/****************
* Request a string from the client over the command-fd
* If getbool, returns static string on true (do not free) or NULL for false
*/
static char *
do_get_from_fd( const char *keyword, int hidden, int getbool )
{
int i, len;
char *string;
if(statusfp!=stdout)
fflush(stdout);
write_status_text( getbool? STATUS_GET_BOOL :
hidden? STATUS_GET_HIDDEN : STATUS_GET_LINE, keyword );
for( string = NULL, i = len = 200; ; i++ ) {
if( i >= len-1 ) {
char *save = string;
len += 100;
string = hidden? xmalloc_secure ( len ) : xmalloc ( len );
if( save )
memcpy(string, save, i );
else
i=0;
}
/* Hmmm: why not use our read_line function here */
if( myread( opt.command_fd, string+i, 1) != 1 || string[i] == '\n' )
break;
else if ( string[i] == CONTROL_D ) {
/* found ETX - cancel the line and return a sole ETX */
string[0] = CONTROL_D;
i=1;
break;
}
}
string[i] = 0;
write_status( STATUS_GOT_IT );
if( getbool ) /* Fixme: is this correct??? */
return (string[0] == 'Y' || string[0] == 'y') ? "" : NULL;
return string;
}
int
cpr_enabled()
{
if( opt.command_fd != -1 )
return 1;
#ifdef USE_SHM_COPROCESSING
if( opt.shm_coprocess )
return 1;
#endif
return 0;
}
char *
cpr_get_no_help( const char *keyword, const char *prompt )
{
char *p;
if( opt.command_fd != -1 )
return do_get_from_fd ( keyword, 0, 0 );
#ifdef USE_SHM_COPROCESSING
if( opt.shm_coprocess )
return do_shm_get( keyword, 0, 0 );
#endif
for(;;) {
p = tty_get( prompt );
return p;
}
}
char *
cpr_get( const char *keyword, const char *prompt )
{
char *p;
if( opt.command_fd != -1 )
return do_get_from_fd ( keyword, 0, 0 );
#ifdef USE_SHM_COPROCESSING
if( opt.shm_coprocess )
return do_shm_get( keyword, 0, 0 );
#endif
for(;;) {
p = tty_get( prompt );
if( *p=='?' && !p[1] && !(keyword && !*keyword)) {
xfree(p);
display_online_help( keyword );
}
else
return p;
}
}
char *
cpr_get_utf8( const char *keyword, const char *prompt )
{
char *p;
p = cpr_get( keyword, prompt );
if( p ) {
char *utf8 = native_to_utf8( p );
xfree( p );
p = utf8;
}
return p;
}
char *
cpr_get_hidden( const char *keyword, const char *prompt )
{
char *p;
if( opt.command_fd != -1 )
return do_get_from_fd ( keyword, 1, 0 );
#ifdef USE_SHM_COPROCESSING
if( opt.shm_coprocess )
return do_shm_get( keyword, 1, 0 );
#endif
for(;;) {
p = tty_get_hidden( prompt );
if( *p == '?' && !p[1] ) {
xfree(p);
display_online_help( keyword );
}
else
return p;
}
}
void
cpr_kill_prompt(void)
{
if( opt.command_fd != -1 )
return;
#ifdef USE_SHM_COPROCESSING
if( opt.shm_coprocess )
return;
#endif
tty_kill_prompt();
return;
}
int
cpr_get_answer_is_yes( const char *keyword, const char *prompt )
{
int yes;
char *p;
if( opt.command_fd != -1 )
return !!do_get_from_fd ( keyword, 0, 1 );
#ifdef USE_SHM_COPROCESSING
if( opt.shm_coprocess )
return !!do_shm_get( keyword, 0, 1 );
#endif
for(;;) {
p = tty_get( prompt );
trim_spaces(p); /* it is okay to do this here */
if( *p == '?' && !p[1] ) {
xfree(p);
display_online_help( keyword );
}
else {
tty_kill_prompt();
yes = answer_is_yes(p);
xfree(p);
return yes;
}
}
}
int
cpr_get_answer_yes_no_quit( const char *keyword, const char *prompt )
{
int yes;
char *p;
if( opt.command_fd != -1 )
return !!do_get_from_fd ( keyword, 0, 1 );
#ifdef USE_SHM_COPROCESSING
if( opt.shm_coprocess )
return !!do_shm_get( keyword, 0, 1 );
#endif
for(;;) {
p = tty_get( prompt );
trim_spaces(p); /* it is okay to do this here */
if( *p == '?' && !p[1] ) {
xfree(p);
display_online_help( keyword );
}
else {
tty_kill_prompt();
yes = answer_is_yes_no_quit(p);
xfree(p);
return yes;
}
}
}
int
cpr_get_answer_okay_cancel (const char *keyword,
const char *prompt,
int def_answer)
{
int yes;
char *answer = NULL;
char *p;
if( opt.command_fd != -1 )
answer = do_get_from_fd ( keyword, 0, 0 );
#ifdef USE_SHM_COPROCESSING
else if( opt.shm_coprocess )
answer = do_shm_get( keyword, 0, 0 );
#endif
if (answer)
{
yes = answer_is_okay_cancel (answer, def_answer);
xfree (answer);
return yes;
}
for(;;)
{
p = tty_get( prompt );
trim_spaces(p); /* it is okay to do this here */
if (*p == '?' && !p[1])
{
xfree(p);
display_online_help (keyword);
}
else
{
tty_kill_prompt();
yes = answer_is_okay_cancel (p, def_answer);
xfree(p);
return yes;
}
}
}
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