mirror of git://git.gnupg.org/gnupg.git
538 lines
12 KiB
C
538 lines
12 KiB
C
/* status.c - Status message and command-fd interface
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003,
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* 2004, 2005, 2006 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <signal.h>
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#include "gpg.h"
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#include "util.h"
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#include "status.h"
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#include "ttyio.h"
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#include "options.h"
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#include "main.h"
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#include "i18n.h"
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#include "cipher.h" /* for progress functions */
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#define CONTROL_D ('D' - 'A' + 1)
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static FILE *statusfp;
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static void
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progress_cb (void *ctx, const char *what, int printchar,
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int current, int total)
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{
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char buf[50];
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if ( printchar == '\n' && !strcmp (what, "primegen") )
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snprintf (buf, sizeof buf -1, "%.20s X 100 100", what );
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else
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snprintf (buf, sizeof buf -1, "%.20s %c %d %d",
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what, printchar=='\n'?'X':printchar, current, total );
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write_status_text (STATUS_PROGRESS, buf);
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}
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/* Return true if the status message NO may currently be issued. We
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need this to avoid syncronisation problem while auto retrieving a
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key. There it may happen that a status NODATA is issued for a non
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available key and the user may falsely interpret this has a missing
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signature. */
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static int
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status_currently_allowed (int no)
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{
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if (!glo_ctrl.in_auto_key_retrieve)
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return 1; /* Yes. */
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/* We allow some statis anyway, so that import statistics are
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correct and to avoid problems if the retriebval subsystem will
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prompt the user. */
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switch (no)
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{
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case STATUS_GET_BOOL:
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case STATUS_GET_LINE:
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case STATUS_GET_HIDDEN:
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case STATUS_GOT_IT:
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case STATUS_IMPORTED:
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case STATUS_IMPORT_OK:
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case STATUS_IMPORT_CHECK:
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case STATUS_IMPORT_RES:
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return 1; /* Yes. */
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default:
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break;
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}
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return 0; /* No. */
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}
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void
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set_status_fd ( int fd )
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{
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static int last_fd = -1;
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if ( fd != -1 && last_fd == fd )
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return;
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if ( statusfp && statusfp != stdout && statusfp != stderr )
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fclose (statusfp);
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statusfp = NULL;
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if ( fd == -1 )
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return;
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if( fd == 1 )
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statusfp = stdout;
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else if( fd == 2 )
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statusfp = stderr;
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else
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statusfp = fdopen( fd, "w" );
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if( !statusfp ) {
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log_fatal("can't open fd %d for status output: %s\n",
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fd, strerror(errno));
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}
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last_fd = fd;
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gcry_set_progress_handler ( progress_cb, NULL );
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}
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int
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is_status_enabled()
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{
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return !!statusfp;
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}
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void
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write_status ( int no )
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{
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write_status_text( no, NULL );
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}
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void
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write_status_text ( int no, const char *text)
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{
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if( !statusfp || !status_currently_allowed (no) )
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return; /* Not enabled or allowed. */
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fputs ( "[GNUPG:] ", statusfp );
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fputs ( get_status_string (no), statusfp );
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if( text ) {
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putc ( ' ', statusfp );
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for (; *text; text++) {
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if (*text == '\n')
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fputs ( "\\n", statusfp );
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else if (*text == '\r')
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fputs ( "\\r", statusfp );
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else
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putc ( *(const byte *)text, statusfp );
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}
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}
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putc ('\n',statusfp);
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if ( fflush (statusfp) && opt.exit_on_status_write_error )
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g10_exit (0);
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}
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/*
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* Write a status line with a buffer using %XX escapes. If WRAP is >
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* 0 wrap the line after this length. If STRING is not NULL it will
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* be prepended to the buffer, no escaping is done for string.
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* A wrap of -1 forces spaces not to be encoded as %20.
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*/
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void
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write_status_text_and_buffer ( int no, const char *string,
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const char *buffer, size_t len, int wrap )
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{
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const char *s, *text;
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int esc, first;
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int lower_limit = ' ';
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size_t n, count, dowrap;
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if( !statusfp || !status_currently_allowed (no) )
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return; /* Not enabled or allowed. */
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if (wrap == -1) {
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lower_limit--;
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wrap = 0;
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}
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text = get_status_string (no);
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count = dowrap = first = 1;
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do {
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if (dowrap) {
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fprintf (statusfp, "[GNUPG:] %s ", text );
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count = dowrap = 0;
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if (first && string) {
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fputs (string, statusfp);
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count += strlen (string);
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}
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first = 0;
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}
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for (esc=0, s=buffer, n=len; n && !esc; s++, n-- ) {
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if ( *s == '%' || *(const byte*)s <= lower_limit
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|| *(const byte*)s == 127 )
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esc = 1;
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if ( wrap && ++count > wrap ) {
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dowrap=1;
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break;
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}
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}
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if (esc) {
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s--; n++;
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}
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if (s != buffer)
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fwrite (buffer, s-buffer, 1, statusfp );
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if ( esc ) {
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fprintf (statusfp, "%%%02X", *(const byte*)s );
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s++; n--;
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}
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buffer = s;
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len = n;
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if ( dowrap && len )
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putc ( '\n', statusfp );
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} while ( len );
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putc ('\n',statusfp);
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if ( fflush (statusfp) && opt.exit_on_status_write_error )
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g10_exit (0);
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}
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void
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write_status_buffer ( int no, const char *buffer, size_t len, int wrap )
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{
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write_status_text_and_buffer (no, NULL, buffer, len, wrap);
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}
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/* Print the BEGIN_SIGNING status message. If MD is not NULL it is
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used retrieve the hash algorithms used for the message. */
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void
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write_status_begin_signing (gcry_md_hd_t md)
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{
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if (md)
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{
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char buf[100];
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size_t buflen;
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int i;
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/* We use a hard coded list of possible algorithms. Using other
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algorithms than specified by OpenPGP does not make sense
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anyway. We do this out of performance reasons: Walking all
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the 110 allowed Ids is not a good idea given the way the
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check is implemented in libgcrypt. Recall that the only use
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of this status code is to create the micalg algorithm for
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PGP/MIME. */
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buflen = 0;
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for (i=1; i <= 11; i++)
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if (i < 4 || i > 7)
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if ( gcry_md_is_enabled (md, i) && buflen < DIM(buf) )
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{
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snprintf (buf+buflen, DIM(buf) - buflen - 1,
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"%sH%d", buflen? " ":"",i);
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buflen += strlen (buf+buflen);
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}
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write_status_text ( STATUS_BEGIN_SIGNING, buf );
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}
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else
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write_status ( STATUS_BEGIN_SIGNING );
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}
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static int
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myread(int fd, void *buf, size_t count)
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{
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int rc;
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do {
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rc = read( fd, buf, count );
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} while ( rc == -1 && errno == EINTR );
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if ( !rc && count ) {
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static int eof_emmited=0;
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if ( eof_emmited < 3 ) {
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*(char*)buf = CONTROL_D;
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rc = 1;
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eof_emmited++;
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}
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else { /* Ctrl-D not caught - do something reasonable */
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#ifdef HAVE_DOSISH_SYSTEM
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raise (SIGINT); /* nothing to hangup under DOS */
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#else
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raise (SIGHUP); /* no more input data */
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#endif
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}
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}
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return rc;
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}
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/* Request a string from the client over the command-fd. If GETBOOL
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is set the function returns a static string (do not free) if the
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netered value was true or NULL if the entered value was false. */
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static char *
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do_get_from_fd ( const char *keyword, int hidden, int getbool )
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{
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int i, len;
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char *string;
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if (statusfp != stdout)
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fflush (stdout);
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write_status_text (getbool? STATUS_GET_BOOL :
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hidden? STATUS_GET_HIDDEN : STATUS_GET_LINE, keyword);
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for (string = NULL, i = len = 200; ; i++ )
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{
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if (i >= len-1 )
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{
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char *save = string;
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len += 100;
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string = hidden? xmalloc_secure ( len ) : xmalloc ( len );
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if (save)
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memcpy (string, save, i );
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else
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i = 0;
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}
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/* Fixme: why not use our read_line function here? */
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if ( myread( opt.command_fd, string+i, 1) != 1 || string[i] == '\n' )
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break;
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else if ( string[i] == CONTROL_D )
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{
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/* Found ETX - Cancel the line and return a sole ETX. */
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string[0] = CONTROL_D;
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i = 1;
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break;
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}
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}
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string[i] = 0;
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write_status (STATUS_GOT_IT);
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if (getbool) /* Fixme: is this correct??? */
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return (string[0] == 'Y' || string[0] == 'y') ? "" : NULL;
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return string;
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}
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int
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cpr_enabled()
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{
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if( opt.command_fd != -1 )
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return 1;
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return 1;
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#endif
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return 0;
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}
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char *
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cpr_get_no_help( const char *keyword, const char *prompt )
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{
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char *p;
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if( opt.command_fd != -1 )
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return do_get_from_fd ( keyword, 0, 0 );
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return do_shm_get( keyword, 0, 0 );
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#endif
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for(;;) {
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p = tty_get( prompt );
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return p;
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}
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}
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char *
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cpr_get( const char *keyword, const char *prompt )
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{
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char *p;
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if( opt.command_fd != -1 )
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return do_get_from_fd ( keyword, 0, 0 );
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return do_shm_get( keyword, 0, 0 );
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#endif
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for(;;) {
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p = tty_get( prompt );
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if( *p=='?' && !p[1] && !(keyword && !*keyword)) {
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xfree(p);
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display_online_help( keyword );
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}
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else
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return p;
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}
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}
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char *
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cpr_get_utf8( const char *keyword, const char *prompt )
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{
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char *p;
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p = cpr_get( keyword, prompt );
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if( p ) {
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char *utf8 = native_to_utf8( p );
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xfree( p );
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p = utf8;
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}
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return p;
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}
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char *
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cpr_get_hidden( const char *keyword, const char *prompt )
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{
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char *p;
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if( opt.command_fd != -1 )
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return do_get_from_fd ( keyword, 1, 0 );
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return do_shm_get( keyword, 1, 0 );
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#endif
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for(;;) {
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p = tty_get_hidden( prompt );
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if( *p == '?' && !p[1] ) {
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xfree(p);
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display_online_help( keyword );
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}
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else
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return p;
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}
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}
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void
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cpr_kill_prompt(void)
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{
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if( opt.command_fd != -1 )
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return;
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return;
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#endif
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tty_kill_prompt();
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return;
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}
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int
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cpr_get_answer_is_yes( const char *keyword, const char *prompt )
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{
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int yes;
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char *p;
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if( opt.command_fd != -1 )
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return !!do_get_from_fd ( keyword, 0, 1 );
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return !!do_shm_get( keyword, 0, 1 );
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#endif
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for(;;) {
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p = tty_get( prompt );
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trim_spaces(p); /* it is okay to do this here */
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if( *p == '?' && !p[1] ) {
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xfree(p);
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display_online_help( keyword );
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}
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else {
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tty_kill_prompt();
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yes = answer_is_yes(p);
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xfree(p);
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return yes;
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}
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}
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}
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int
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cpr_get_answer_yes_no_quit( const char *keyword, const char *prompt )
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{
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int yes;
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char *p;
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if( opt.command_fd != -1 )
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return !!do_get_from_fd ( keyword, 0, 1 );
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return !!do_shm_get( keyword, 0, 1 );
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#endif
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for(;;) {
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p = tty_get( prompt );
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trim_spaces(p); /* it is okay to do this here */
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if( *p == '?' && !p[1] ) {
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xfree(p);
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display_online_help( keyword );
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}
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else {
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tty_kill_prompt();
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yes = answer_is_yes_no_quit(p);
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xfree(p);
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return yes;
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}
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}
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}
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int
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cpr_get_answer_okay_cancel (const char *keyword,
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const char *prompt,
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int def_answer)
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{
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int yes;
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char *answer = NULL;
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char *p;
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if( opt.command_fd != -1 )
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answer = do_get_from_fd ( keyword, 0, 0 );
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#ifdef USE_SHM_COPROCESSING
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else if( opt.shm_coprocess )
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answer = do_shm_get( keyword, 0, 0 );
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#endif
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if (answer)
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{
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yes = answer_is_okay_cancel (answer, def_answer);
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xfree (answer);
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return yes;
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}
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for(;;)
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{
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p = tty_get( prompt );
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trim_spaces(p); /* it is okay to do this here */
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if (*p == '?' && !p[1])
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{
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xfree(p);
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display_online_help (keyword);
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}
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else
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{
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tty_kill_prompt();
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yes = answer_is_okay_cancel (p, def_answer);
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xfree(p);
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return yes;
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}
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}
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}
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