/* openfile.c * Copyright (C) 1998 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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ #include #include #include #include #include #include #include #include "util.h" #include "memory.h" #include "ttyio.h" #include "options.h" #include "main.h" #include "status.h" #include "i18n.h" #ifdef USE_ONLY_8DOT3 #define SKELEXT ".skl" #else #define SKELEXT ".skel" #endif #ifdef HAVE_DRIVE_LETTERS #define CMP_FILENAME(a,b) stricmp( (a), (b) ) #else #define CMP_FILENAME(a,b) strcmp( (a), (b) ) #endif /* FIXME: Implement opt.interactive. */ /**************** * Check whether FNAME exists and ask if it's okay to overwrite an * existing one. * Returns: True: it's okay to overwrite or the file does not exist * False: Do not overwrite */ int overwrite_filep( const char *fname ) { if( !fname || (*fname == '-' && !fname[1]) ) return 1; /* writing to stdout is always okay */ if( access( fname, F_OK ) ) return 1; /* does not exist */ /* fixme: add some backup stuff in case of overwrite */ if( opt.answer_yes ) return 1; if( opt.answer_no || opt.batch ) return 0; /* do not overwrite */ tty_printf(_("File `%s' exists. "), fname); if( cpr_get_answer_is_yes("openfile.overwrite.okay", _("Overwrite (y/N)? ")) ) return 1; return 0; } /**************** * Strip know extensions from iname and return a newly allocated * filename. Return NULL if we can't do that. */ char * make_outfile_name( const char *iname ) { size_t n; if( (!iname || (*iname=='-' && !iname[1]) )) return m_strdup("-"); n = strlen(iname); if( n > 4 && ( !CMP_FILENAME(iname+n-4,".gpg") || !CMP_FILENAME(iname+n-4,".pgp") || !CMP_FILENAME(iname+n-4,".sig") || !CMP_FILENAME(iname+n-4,".asc") ) ) { char *buf = m_strdup( iname ); buf[n-4] = 0; return buf; } log_info(_("%s: unknown suffix\n"), iname ); return NULL; } /**************** * Ask for a outputfilename and use the given one as default. * Return NULL if no file has been given or it is not possible to * ask the user. */ char * ask_outfile_name( const char *name, size_t namelen ) { size_t n; const char *s; char *prompt; char *fname; char *defname; if( opt.batch ) return NULL; s = _("Enter new filename"); n = strlen(s) + namelen + 10; defname = name && namelen? make_printable_string( name, namelen, 0): NULL; prompt = m_alloc(n); if( defname ) sprintf(prompt, "%s [%s]: ", s, defname ); else sprintf(prompt, "%s: ", s ); fname = cpr_get("openfile.askoutname", prompt ); cpr_kill_prompt(); m_free(prompt); if( !*fname ) { m_free( fname ); fname = NULL; fname = defname; defname = NULL; } m_free(defname); return fname; } /**************** * Make an output filename for the inputfile INAME. * Returns an IOBUF and an errorcode * Mode 0 = use ".gpg" * 1 = use ".asc" * 2 = use ".sig" */ int open_outfile( const char *iname, int mode, IOBUF *a ) { int rc = 0; *a = NULL; if( (!iname || (*iname=='-' && !iname[1])) && !opt.outfile ) { if( !(*a = iobuf_create(NULL)) ) { log_error(_("%s: can't open: %s\n"), "[stdout]", strerror(errno) ); rc = G10ERR_CREATE_FILE; } else if( opt.verbose ) log_info(_("writing to stdout\n")); } else { char *buf=NULL; const char *name; if( opt.dry_run ) name = "/dev/null"; else if( opt.outfile ) name = opt.outfile; else { #ifdef USE_ONLY_8DOT3 /* It is quite common for DOS system to have only one dot in a * a filename So if we have something like this, we simple * replace the suffix execpt in cases where the suffix is * larger than 3 characters and not the same as. * We should really map the filenames to 8.3 but this tends to * be more complicated and is probaly a duty of the filesystem */ char *dot; const char *newsfx = mode==1 ? ".asc" : mode==2 ? ".sig" : ".gpg"; buf = m_alloc(strlen(iname)+4+1); strcpy(buf,iname); dot = strchr(buf, '.' ); if( dot && dot > buf && dot[1] && strlen(dot) <= 4 && CMP_FILENAME(newsfx, dot) ) { strcpy(dot, newsfx ); } else if( dot && !dot[1] ) /* don't duplicate a dot */ strcat( dot, newsfx+1 ); else strcat( buf, newsfx ); #else buf = m_alloc(strlen(iname)+4+1); strcpy(stpcpy(buf,iname), mode==1 ? ".asc" : mode==2 ? ".sig" : ".gpg"); #endif name = buf; } if( overwrite_filep( name ) ) { if( !(*a = iobuf_create( name )) ) { log_error(_("%s: can't create: %s\n"), name, strerror(errno) ); rc = G10ERR_CREATE_FILE; } else if( opt.verbose ) log_info(_("writing to `%s'\n"), name ); } else rc = G10ERR_FILE_EXISTS; m_free(buf); } return rc; } /**************** * Try to open a file without the extension ".sig" or ".asc" * Return NULL if such a file is not available. */ IOBUF open_sigfile( const char *iname ) { IOBUF a = NULL; size_t len; if( iname && !(*iname == '-' && !iname[1]) ) { len = strlen(iname); if( len > 4 && ( !strcmp(iname + len - 4, ".sig") || !strcmp(iname + len - 4, ".asc")) ) { char *buf; buf = m_strdup(iname); buf[len-4] = 0 ; a = iobuf_open( buf ); if( opt.verbose ) log_info(_("assuming signed data in `%s'\n"), buf ); m_free(buf); } } return a; } /**************** * Copy the option file skeleton to the given directory. */ void copy_options_file( const char *destdir ) { const char *datadir = GNUPG_DATADIR; char *fname; FILE *src, *dst; int linefeeds=0; int c; if( opt.dry_run ) return; fname = m_alloc( strlen(datadir) + strlen(destdir) + 15 ); strcpy(stpcpy(fname, datadir), "/options" SKELEXT ); src = fopen( fname, "r" ); if( !src ) { log_error(_("%s: can't open: %s\n"), fname, strerror(errno) ); m_free(fname); return; } strcpy(stpcpy(fname, destdir), "/options" ); dst = fopen( fname, "w" ); if( !dst ) { log_error(_("%s: can't create: %s\n"), fname, strerror(errno) ); fclose( src ); m_free(fname); return; } while( (c=getc(src)) != EOF ) { if( linefeeds < 3 ) { if( c == '\n' ) linefeeds++; } else putc( c, dst ); } fclose( dst ); fclose( src ); log_info(_("%s: new options file created\n"), fname ); m_free(fname); }