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c2fd5c94 WJ |
1 | /*- |
2 | * Copyright (c) 1990 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Hugh Smith at The University of Guelph. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
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. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | */ | |
36 | ||
37 | #ifndef lint | |
38 | static char sccsid[] = "@(#)replace.c 5.8 (Berkeley) 3/15/91"; | |
39 | #endif /* not lint */ | |
40 | ||
41 | #include <sys/param.h> | |
42 | #include <sys/stat.h> | |
43 | #include <fcntl.h> | |
44 | #include <dirent.h> | |
45 | #include <errno.h> | |
46 | #include <unistd.h> | |
47 | #include <ar.h> | |
48 | #include <stdio.h> | |
49 | #include <string.h> | |
50 | #include "archive.h" | |
51 | #include "extern.h" | |
52 | ||
53 | extern CHDR chdr; /* converted header */ | |
54 | extern char *archive; /* archive name */ | |
55 | extern char *tname; /* temporary file "name" */ | |
56 | ||
57 | /* | |
58 | * replace -- | |
59 | * Replace or add named members to archive. Entries already in the | |
60 | * archive are swapped in place. Others are added before or after | |
61 | * the key entry, based on the a, b and i options. If the u option | |
62 | * is specified, modification dates select for replacement. | |
63 | */ | |
64 | replace(argv) | |
65 | char **argv; | |
66 | { | |
67 | extern char *posarg, *posname; /* positioning file name */ | |
68 | register char *file; | |
69 | register int afd, curfd, mods, sfd; | |
70 | struct stat sb; | |
71 | CF cf; | |
72 | off_t size, tsize; | |
73 | int err, exists, tfd1, tfd2; | |
74 | char *rname(); | |
75 | ||
76 | err = 0; | |
77 | /* | |
78 | * If doesn't exist, simply append to the archive. There's | |
79 | * a race here, but it's pretty short, and not worth fixing. | |
80 | */ | |
81 | exists = !stat(archive, &sb); | |
82 | afd = open_archive(O_CREAT|O_RDWR); | |
83 | ||
84 | if (!exists) { | |
85 | tfd1 = -1; | |
86 | tfd2 = tmp(); | |
87 | goto append; | |
88 | } | |
89 | ||
90 | tfd1 = tmp(); /* Files before key file. */ | |
91 | tfd2 = tmp(); /* Files after key file. */ | |
92 | ||
93 | /* | |
94 | * Break archive into two parts -- entries before and after the key | |
95 | * entry. If positioning before the key, place the key at the | |
96 | * beginning of the after key entries and if positioning after the | |
97 | * key, place the key at the end of the before key entries. Put it | |
98 | * all back together at the end. | |
99 | */ | |
100 | mods = (options & (AR_A|AR_B)); | |
101 | for (curfd = tfd1; get_arobj(afd);) { | |
102 | if (*argv && (file = files(argv))) { | |
103 | if ((sfd = open(file, O_RDONLY)) < 0) { | |
104 | err = 1; | |
105 | (void)fprintf(stderr, "ar: %s: %s.\n", | |
106 | file, strerror(errno)); | |
107 | goto useold; | |
108 | } | |
109 | (void)fstat(sfd, &sb); | |
110 | if (options & AR_U && sb.st_mtime <= chdr.date) | |
111 | goto useold; | |
112 | ||
113 | if (options & AR_V) | |
114 | (void)printf("r - %s\n", file); | |
115 | ||
116 | /* Read from disk, write to an archive; pad on write */ | |
117 | SETCF(sfd, file, curfd, tname, WPAD); | |
118 | put_arobj(&cf, &sb); | |
119 | (void)close(sfd); | |
120 | skip_arobj(afd); | |
121 | continue; | |
122 | } | |
123 | ||
124 | if (mods && compare(posname)) { | |
125 | mods = 0; | |
126 | if (options & AR_B) | |
127 | curfd = tfd2; | |
128 | /* Read and write to an archive; pad on both. */ | |
129 | SETCF(afd, archive, curfd, tname, RPAD|WPAD); | |
130 | put_arobj(&cf, (struct stat *)NULL); | |
131 | if (options & AR_A) | |
132 | curfd = tfd2; | |
133 | } else { | |
134 | /* Read and write to an archive; pad on both. */ | |
135 | useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD); | |
136 | put_arobj(&cf, (struct stat *)NULL); | |
137 | } | |
138 | } | |
139 | ||
140 | if (mods) { | |
141 | (void)fprintf(stderr, "ar: %s: archive member not found.\n", | |
142 | posarg); | |
143 | close_archive(afd); | |
144 | return(1); | |
145 | } | |
146 | ||
147 | /* Append any left-over arguments to the end of the after file. */ | |
148 | append: while (file = *argv++) { | |
149 | if (options & AR_V) | |
150 | (void)printf("a - %s\n", file); | |
151 | if ((sfd = open(file, O_RDONLY)) < 0) { | |
152 | err = 1; | |
153 | (void)fprintf(stderr, "ar: %s: %s.\n", | |
154 | file, strerror(errno)); | |
155 | continue; | |
156 | } | |
157 | (void)fstat(sfd, &sb); | |
158 | /* Read from disk, write to an archive; pad on write. */ | |
159 | SETCF(sfd, file, | |
160 | options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD); | |
161 | put_arobj(&cf, &sb); | |
162 | (void)close(sfd); | |
163 | } | |
164 | ||
165 | (void)lseek(afd, (off_t)SARMAG, SEEK_SET); | |
166 | ||
167 | SETCF(tfd1, tname, afd, archive, NOPAD); | |
168 | if (tfd1 != -1) { | |
169 | tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR); | |
170 | (void)lseek(tfd1, (off_t)0, SEEK_SET); | |
171 | copy_ar(&cf, size); | |
172 | } else | |
173 | tsize = 0; | |
174 | ||
175 | tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR); | |
176 | (void)lseek(tfd2, (off_t)0, SEEK_SET); | |
177 | cf.rfd = tfd2; | |
178 | copy_ar(&cf, size); | |
179 | ||
180 | (void)ftruncate(afd, tsize + SARMAG); | |
181 | close_archive(afd); | |
182 | return(err); | |
183 | } |