Annotation of src/usr.bin/ar/replace.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: replace.c,v 1.6 1995/03/26 03:28:01 glass Exp $ */
! 2:
! 3: /*-
! 4: * Copyright (c) 1990, 1993, 1994
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * This code is derived from software contributed to Berkeley by
! 8: * Hugh Smith at The University of Guelph.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed by the University of
! 21: * California, Berkeley and its contributors.
! 22: * 4. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: */
! 38:
! 39: #ifndef lint
! 40: #if 0
! 41: static char sccsid[] = "@(#)replace.c 8.3 (Berkeley) 4/2/94";
! 42: #else
! 43: static char rcsid[] = "$NetBSD: replace.c,v 1.6 1995/03/26 03:28:01 glass Exp $";
! 44: #endif
! 45: #endif /* not lint */
! 46:
! 47: #include <sys/param.h>
! 48: #include <sys/stat.h>
! 49:
! 50: #include <ar.h>
! 51: #include <dirent.h>
! 52: #include <err.h>
! 53: #include <fcntl.h>
! 54: #include <stdio.h>
! 55: #include <string.h>
! 56: #include <unistd.h>
! 57:
! 58: #include "archive.h"
! 59: #include "extern.h"
! 60:
! 61: /*
! 62: * replace --
! 63: * Replace or add named members to archive. Entries already in the
! 64: * archive are swapped in place. Others are added before or after
! 65: * the key entry, based on the a, b and i options. If the u option
! 66: * is specified, modification dates select for replacement.
! 67: */
! 68: int
! 69: replace(argv)
! 70: char **argv;
! 71: {
! 72: char *file;
! 73: int afd, curfd, errflg, exists, mods, sfd, tfd1, tfd2;
! 74: struct stat sb;
! 75: CF cf;
! 76: off_t size, tsize;
! 77:
! 78: errflg = 0;
! 79: /*
! 80: * If doesn't exist, simply append to the archive. There's
! 81: * a race here, but it's pretty short, and not worth fixing.
! 82: */
! 83: exists = !stat(archive, &sb);
! 84: afd = open_archive(O_CREAT|O_RDWR);
! 85:
! 86: if (!exists) {
! 87: tfd1 = -1;
! 88: tfd2 = tmp();
! 89: goto append;
! 90: }
! 91:
! 92: tfd1 = tmp(); /* Files before key file. */
! 93: tfd2 = tmp(); /* Files after key file. */
! 94:
! 95: /*
! 96: * Break archive into two parts -- entries before and after the key
! 97: * entry. If positioning before the key, place the key at the
! 98: * beginning of the after key entries and if positioning after the
! 99: * key, place the key at the end of the before key entries. Put it
! 100: * all back together at the end.
! 101: */
! 102: mods = (options & (AR_A|AR_B));
! 103: for (curfd = tfd1; get_arobj(afd);) {
! 104: if (*argv && (file = files(argv))) {
! 105: if ((sfd = open(file, O_RDONLY)) < 0) {
! 106: errflg = 1;
! 107: warn("%s", file);
! 108: goto useold;
! 109: }
! 110: (void)fstat(sfd, &sb);
! 111: if (options & AR_U && sb.st_mtime <= chdr.date) {
! 112: close(sfd);
! 113: goto useold;
! 114: }
! 115:
! 116: if (options & AR_V)
! 117: (void)printf("r - %s\n", file);
! 118:
! 119: /* Read from disk, write to an archive; pad on write */
! 120: SETCF(sfd, file, curfd, tname, WPAD);
! 121: put_arobj(&cf, &sb);
! 122: (void)close(sfd);
! 123: skip_arobj(afd);
! 124: continue;
! 125: }
! 126:
! 127: if (mods && compare(posname)) {
! 128: mods = 0;
! 129: if (options & AR_B)
! 130: curfd = tfd2;
! 131: /* Read and write to an archive; pad on both. */
! 132: SETCF(afd, archive, curfd, tname, RPAD|WPAD);
! 133: put_arobj(&cf, (struct stat *)NULL);
! 134: if (options & AR_A)
! 135: curfd = tfd2;
! 136: } else {
! 137: /* Read and write to an archive; pad on both. */
! 138: useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD);
! 139: put_arobj(&cf, (struct stat *)NULL);
! 140: }
! 141: }
! 142:
! 143: if (mods) {
! 144: warnx("%s: archive member not found", posarg);
! 145: close_archive(afd);
! 146: return (1);
! 147: }
! 148:
! 149: /* Append any left-over arguments to the end of the after file. */
! 150: append: while (file = *argv++) {
! 151: if (options & AR_V)
! 152: (void)printf("a - %s\n", file);
! 153: if ((sfd = open(file, O_RDONLY)) < 0) {
! 154: errflg = 1;
! 155: warn("%s", file);
! 156: continue;
! 157: }
! 158: (void)fstat(sfd, &sb);
! 159: /* Read from disk, write to an archive; pad on write. */
! 160: SETCF(sfd, file,
! 161: options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD);
! 162: put_arobj(&cf, &sb);
! 163: (void)close(sfd);
! 164: }
! 165:
! 166: (void)lseek(afd, (off_t)SARMAG, SEEK_SET);
! 167:
! 168: SETCF(tfd1, tname, afd, archive, NOPAD);
! 169: if (tfd1 != -1) {
! 170: tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR);
! 171: (void)lseek(tfd1, (off_t)0, SEEK_SET);
! 172: copy_ar(&cf, size);
! 173: } else
! 174: tsize = 0;
! 175:
! 176: tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR);
! 177: (void)lseek(tfd2, (off_t)0, SEEK_SET);
! 178: cf.rfd = tfd2;
! 179: copy_ar(&cf, size);
! 180:
! 181: (void)ftruncate(afd, tsize + SARMAG);
! 182: close_archive(afd);
! 183: return (errflg);
! 184: }
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