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Annotation of src/usr.bin/ar/extract.c, Revision 1.8

1.8     ! deraadt     1: /*     $OpenBSD: extract.c,v 1.7 2004/09/07 09:41:43 miod Exp $        */
1.1       deraadt     2: /*     $NetBSD: extract.c,v 1.5 1995/03/26 03:27:53 glass Exp $        */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1990, 1993, 1994
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Hugh Smith at The University of Guelph.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
1.5       millert    19:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #include <sys/param.h>
                     37: #include <sys/time.h>
                     38: #include <sys/stat.h>
                     39:
                     40: #include <dirent.h>
                     41: #include <err.h>
                     42: #include <fcntl.h>
                     43: #include <stdio.h>
                     44: #include <string.h>
                     45: #include <unistd.h>
                     46:
                     47: #include "archive.h"
                     48: #include "extern.h"
                     49:
                     50: /*
                     51:  * extract --
                     52:  *     Extract files from the named archive - if member names given only
                     53:  *     extract those members otherwise extract all members.  If 'o' option
                     54:  *     selected modify date of newly created file to be same as archive
                     55:  *     members date otherwise date is time of extraction.  Does not modify
                     56:  *     archive.
                     57:  */
                     58: int
1.6       deraadt    59: extract(char **argv)
1.1       deraadt    60: {
                     61:        char *file;
                     62:        int afd, all, eval, tfd;
                     63:        struct timeval tv[2];
                     64:        struct stat sb;
                     65:        CF cf;
                     66:
                     67:        eval = 0;
                     68:        tv[0].tv_usec = tv[1].tv_usec = 0;
                     69:
                     70:        afd = open_archive(O_RDONLY);
                     71:
                     72:        /* Read from an archive, write to disk; pad on read. */
                     73:        SETCF(afd, archive, 0, 0, RPAD);
                     74:        for (all = !*argv; get_arobj(afd);) {
                     75:                if (all)
                     76:                        file = chdr.name;
                     77:                else if (!(file = files(argv))) {
                     78:                        skip_arobj(afd);
                     79:                        continue;
                     80:                }
                     81:
                     82:                if (options & AR_U && !stat(file, &sb) &&
                     83:                    sb.st_mtime > chdr.date)
                     84:                        continue;
                     85:
1.4       denny      86:                if (options & AR_CC) {
                     87:                        /* -C means do not overwrite existing files */
                     88:                        if ((tfd = open(file, O_WRONLY|O_CREAT|O_EXCL,
                     89:                            S_IWUSR)) < 0) {
                     90:                                skip_arobj(afd);
                     91:                                eval = 1;
                     92:                                continue;
                     93:                        }
                     94:                } else {
                     95:                        if ((tfd = open(file, O_WRONLY|O_CREAT|O_TRUNC,
                     96:                            S_IWUSR)) < 0) {
                     97:                                warn("%s", file);
                     98:                                skip_arobj(afd);
                     99:                                eval = 1;
                    100:                                continue;
                    101:                        }
1.1       deraadt   102:                }
                    103:
                    104:                if (options & AR_V)
                    105:                        (void)printf("x - %s\n", file);
                    106:
                    107:                cf.wfd = tfd;
                    108:                cf.wname = file;
                    109:                copy_ar(&cf, chdr.size);
                    110:
1.7       miod      111:                if (fchmod(tfd, (mode_t)chdr.mode)) {
1.1       deraadt   112:                        warn("chmod: %s", file);
                    113:                        eval = 1;
                    114:                }
                    115:                if (options & AR_O) {
                    116:                        tv[0].tv_sec = tv[1].tv_sec = chdr.date;
1.3       deraadt   117:                        if (futimes(tfd, tv)) {
1.1       deraadt   118:                                warn("utimes: %s", file);
                    119:                                eval = 1;
                    120:                        }
                    121:                }
                    122:                (void)close(tfd);
                    123:                if (!all && !*argv)
                    124:                        break;
                    125:        }
                    126:        close_archive(afd);
                    127:
                    128:        if (*argv) {
                    129:                orphans(argv);
                    130:                return (1);
                    131:        }
                    132:        return (0);
                    133: }