/* $OpenBSD: extract.c,v 1.7 2004/09/07 09:41:43 miod Exp $ */ /* $NetBSD: extract.c,v 1.5 1995/03/26 03:27:53 glass Exp $ */ /*- * Copyright (c) 1990, 1993, 1994 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Hugh Smith at The University of Guelph. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint #if 0 static char sccsid[] = "@(#)extract.c 8.3 (Berkeley) 4/2/94"; #else static char rcsid[] = "$OpenBSD: extract.c,v 1.7 2004/09/07 09:41:43 miod Exp $"; #endif #endif /* not lint */ #include <sys/param.h> #include <sys/time.h> #include <sys/stat.h> #include <dirent.h> #include <err.h> #include <fcntl.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include "archive.h" #include "extern.h" /* * extract -- * Extract files from the named archive - if member names given only * extract those members otherwise extract all members. If 'o' option * selected modify date of newly created file to be same as archive * members date otherwise date is time of extraction. Does not modify * archive. */ int extract(char **argv) { char *file; int afd, all, eval, tfd; struct timeval tv[2]; struct stat sb; CF cf; eval = 0; tv[0].tv_usec = tv[1].tv_usec = 0; afd = open_archive(O_RDONLY); /* Read from an archive, write to disk; pad on read. */ SETCF(afd, archive, 0, 0, RPAD); for (all = !*argv; get_arobj(afd);) { if (all) file = chdr.name; else if (!(file = files(argv))) { skip_arobj(afd); continue; } if (options & AR_U && !stat(file, &sb) && sb.st_mtime > chdr.date) continue; if (options & AR_CC) { /* -C means do not overwrite existing files */ if ((tfd = open(file, O_WRONLY|O_CREAT|O_EXCL, S_IWUSR)) < 0) { skip_arobj(afd); eval = 1; continue; } } else { if ((tfd = open(file, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR)) < 0) { warn("%s", file); skip_arobj(afd); eval = 1; continue; } } if (options & AR_V) (void)printf("x - %s\n", file); cf.wfd = tfd; cf.wname = file; copy_ar(&cf, chdr.size); if (fchmod(tfd, (mode_t)chdr.mode)) { warn("chmod: %s", file); eval = 1; } if (options & AR_O) { tv[0].tv_sec = tv[1].tv_sec = chdr.date; if (futimes(tfd, tv)) { warn("utimes: %s", file); eval = 1; } } (void)close(tfd); if (!all && !*argv) break; } close_archive(afd); if (*argv) { orphans(argv); return (1); } return (0); }