2 * Copyright (c) 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Hugh Smith at The University of Guelph.
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9 * modification, are permitted provided that the following conditions
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14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
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38 static const char sccsid[] = "@(#)replace.c 8.3 (Berkeley) 4/2/94";
41 #include <sys/param.h>
57 * Replace or add named members to archive. Entries already in the
58 * archive are swapped in place. Others are added before or after
59 * the key entry, based on the a, b and i options. If the u option
60 * is specified, modification dates select for replacement.
67 int afd, curfd, errflg, exists, mods, sfd, tfd1, tfd2;
74 * If doesn't exist, simply append to the archive. There's
75 * a race here, but it's pretty short, and not worth fixing.
77 exists = !stat(archive, &sb);
78 afd = open_archive(O_CREAT|O_RDWR);
86 tfd1 = tmp(); /* Files before key file. */
87 tfd2 = tmp(); /* Files after key file. */
90 * Break archive into two parts -- entries before and after the key
91 * entry. If positioning before the key, place the key at the
92 * beginning of the after key entries and if positioning after the
93 * key, place the key at the end of the before key entries. Put it
94 * all back together at the end.
96 mods = (options & (AR_A|AR_B));
97 for (curfd = tfd1; get_arobj(afd);) {
98 if (*argv && (file = files(argv))) {
99 if ((sfd = open(file, O_RDONLY)) < 0) {
104 (void)fstat(sfd, &sb);
105 if (options & AR_U && sb.st_mtime <= chdr.date) {
111 (void)printf("r - %s\n", file);
113 /* Read from disk, write to an archive; pad on write */
114 SETCF(sfd, file, curfd, tname, WPAD);
121 if (mods && compare(posname)) {
125 /* Read and write to an archive; pad on both. */
126 SETCF(afd, archive, curfd, tname, RPAD|WPAD);
127 put_arobj(&cf, (struct stat *)NULL);
131 /* Read and write to an archive; pad on both. */
132 useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD);
133 put_arobj(&cf, (struct stat *)NULL);
138 warnx("%s: archive member not found", posarg);
143 /* Append any left-over arguments to the end of the after file. */
144 append: while ( (file = *argv++) ) {
146 (void)printf("a - %s\n", file);
147 if ((sfd = open(file, O_RDONLY)) < 0) {
152 (void)fstat(sfd, &sb);
153 /* Read from disk, write to an archive; pad on write. */
155 options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD);
160 (void)lseek(afd, (off_t)SARMAG, SEEK_SET);
162 SETCF(tfd1, tname, afd, archive, NOPAD);
164 tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR);
165 (void)lseek(tfd1, (off_t)0, SEEK_SET);
170 tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR);
171 (void)lseek(tfd2, (off_t)0, SEEK_SET);
175 (void)ftruncate(afd, tsize + SARMAG);