Commit | Line | Data |
---|---|---|
20f08463 KB |
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 | * %sccs.include.redist.c% | |
9 | */ | |
10 | ||
11 | #ifndef lint | |
bf53959e | 12 | static char sccsid[] = "@(#)replace.c 5.2 (Berkeley) %G%"; |
20f08463 KB |
13 | #endif /* not lint */ |
14 | ||
15 | #include <sys/param.h> | |
16 | #include <sys/stat.h> | |
17 | #include <sys/errno.h> | |
18 | #include <fcntl.h> | |
19 | #include <unistd.h> | |
20 | #include <dirent.h> | |
21 | #include <ar.h> | |
22 | #include <stdio.h> | |
23 | #include "archive.h" | |
24 | ||
25 | extern CHDR chdr; /* converted header */ | |
26 | extern char *archive; /* archive name */ | |
27 | extern char *tname; /* temporary file "name" */ | |
28 | ||
29 | /* | |
30 | * replace -- | |
31 | * Replace or add named members to archive. Entries already in the | |
32 | * archive are swapped in place. Others are added before or after | |
33 | * the key entry, based on the a, b and i options. If the u option | |
34 | * is specified, modification dates select for replacement. | |
35 | */ | |
36 | replace(argv) | |
37 | char **argv; | |
38 | { | |
39 | extern char *posname; /* positioning file name */ | |
40 | register char *file; | |
41 | register int afd, curfd, mods, sfd; | |
42 | struct stat sb; | |
43 | CF cf; | |
44 | off_t size, tsize; | |
45 | int err, exists, tfd1, tfd2; | |
46 | char *rname(); | |
47 | ||
48 | /* | |
49 | * If doesn't exist, simply append to the archive. There's | |
50 | * a race here, but it's pretty short, and not worth fixing. | |
51 | */ | |
52 | exists = !stat(archive, &sb); | |
53 | afd = open_archive(O_CREAT|O_RDWR); | |
54 | ||
55 | if (!exists) { | |
56 | tfd1 = -1; | |
57 | tfd2 = tmp(); | |
58 | goto append; | |
59 | } | |
60 | ||
61 | tfd1 = tmp(); /* Files before key file. */ | |
62 | tfd2 = tmp(); /* Files after key file. */ | |
20f08463 KB |
63 | |
64 | /* | |
65 | * Break archive into two parts -- entries before and after the key | |
66 | * entry. If positioning before the key, place the key at the | |
67 | * beginning of the after key entries and if positioning after the | |
68 | * key, place the key at the end of the before key entries. Put it | |
69 | * all back together at the end. | |
70 | */ | |
bf53959e | 71 | mods = (options & (AR_A|AR_B)); |
20f08463 KB |
72 | for (err = 0, curfd = tfd1; get_header(afd);) { |
73 | if ((file = *argv) && files(argv)) { | |
74 | if ((sfd = open(file, O_RDONLY)) < 0) { | |
75 | err = 1; | |
76 | (void)fprintf(stderr, "ar: %s: %s.\n", | |
77 | file, strerror(errno)); | |
78 | goto useold; | |
79 | } | |
80 | (void)fstat(sfd, &sb); | |
81 | if (options & AR_U && sb.st_mtime <= chdr.date) | |
82 | goto useold; | |
83 | ||
84 | if (options & AR_V) | |
85 | (void)printf("r - %s\n", chdr.name); | |
86 | ||
87 | SETCF(sfd, file, curfd, tname, WPAD); | |
88 | put_header(&cf, &sb); | |
89 | copyfile(&cf, sb.st_size); | |
90 | (void)close(sfd); | |
91 | SKIP(afd, chdr.size, archive); | |
92 | continue; | |
93 | } | |
94 | ||
95 | if (mods && compare(posname)) { | |
96 | mods = 0; | |
97 | if (options & AR_B) | |
98 | curfd = tfd2; | |
99 | SETCF(afd, archive, curfd, tname, RPAD|WPAD); | |
100 | put_header(&cf, (struct stat *)NULL); | |
101 | copyfile(&cf, chdr.size); | |
102 | if (options & AR_A) | |
103 | curfd = tfd2; | |
104 | } else { | |
105 | useold: SETCF(afd, archive, curfd, tname, RPAD|WPAD); | |
106 | put_header(&cf, (struct stat *)NULL); | |
107 | copyfile(&cf, chdr.size); | |
108 | } | |
109 | } | |
110 | ||
111 | if (mods) { | |
112 | (void)fprintf(stderr, "ar: %s: archive member not found.\n", | |
113 | posname); | |
114 | close_archive(afd); | |
115 | return(1); | |
116 | } | |
117 | ||
118 | /* Append any left-over arguments to the end of the after file. */ | |
119 | append: while (file = *argv++) { | |
120 | if (options & AR_V) | |
121 | (void)printf("a - %s\n", rname(file)); | |
122 | if ((sfd = open(file, O_RDONLY)) < 0) { | |
123 | err = 1; | |
124 | (void)fprintf(stderr, "ar: %s: %s.\n", | |
125 | file, strerror(errno)); | |
126 | continue; | |
127 | } | |
128 | (void)fstat(sfd, &sb); | |
bf53959e KB |
129 | SETCF(sfd, file, |
130 | options & (AR_A|AR_B) ? tfd1 : tfd2, tname, WPAD); | |
20f08463 KB |
131 | put_header(&cf, &sb); |
132 | copyfile(&cf, sb.st_size); | |
133 | (void)close(sfd); | |
134 | } | |
135 | ||
136 | (void)lseek(afd, (off_t)SARMAG, SEEK_SET); | |
137 | ||
138 | SETCF(tfd1, tname, afd, archive, RPAD|WPAD); | |
139 | if (tfd1 != -1) { | |
140 | tsize = size = lseek(tfd1, (off_t)0, SEEK_CUR); | |
141 | (void)lseek(tfd1, (off_t)0, SEEK_SET); | |
142 | copyfile(&cf, size); | |
143 | } else | |
144 | tsize = 0; | |
145 | ||
146 | tsize += size = lseek(tfd2, (off_t)0, SEEK_CUR); | |
147 | (void)lseek(tfd2, (off_t)0, SEEK_SET); | |
148 | cf.rfd = tfd2; | |
149 | copyfile(&cf, size); | |
150 | ||
151 | (void)ftruncate(afd, tsize + SARMAG); | |
152 | close_archive(afd); | |
153 | return(err); | |
154 | } |