|
172
|
1 /*
|
|
|
2 add.c
|
|
|
3 Copyright © 2009 William Astle
|
|
|
4
|
|
|
5 This file is part of LWAR.
|
|
|
6
|
|
|
7 LWAR is free software: you can redistribute it and/or modify it under the
|
|
|
8 terms of the GNU General Public License as published by the Free Software
|
|
|
9 Foundation, either version 3 of the License, or (at your option) any later
|
|
|
10 version.
|
|
|
11
|
|
|
12 This program is distributed in the hope that it will be useful, but WITHOUT
|
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
|
15 more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License along with
|
|
|
18 this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
19
|
|
|
20
|
|
|
21 Implements the program startup code
|
|
|
22
|
|
|
23 */
|
|
|
24
|
|
|
25 #ifdef HAVE_CONFIG_H
|
|
|
26 #include "config.h"
|
|
|
27 #endif
|
|
|
28
|
|
|
29 #include <errno.h>
|
|
|
30 #include <stdio.h>
|
|
|
31 #include <stdlib.h>
|
|
|
32
|
|
|
33 #include "lwar.h"
|
|
|
34
|
|
|
35 void do_add(void)
|
|
|
36 {
|
|
|
37 FILE *f;
|
|
|
38 unsigned char buf[8];
|
|
|
39 long l;
|
|
|
40 int c;
|
|
|
41 FILE *f2;
|
|
|
42 int i;
|
|
|
43
|
|
|
44 f = fopen(archive_file, "r+");
|
|
|
45 if (!f)
|
|
|
46 {
|
|
|
47 if (errno == ENOENT)
|
|
|
48 {
|
|
|
49 f = fopen(archive_file, "w");
|
|
|
50 if (f)
|
|
|
51 {
|
|
|
52 fputs("LWAR1V", f);
|
|
|
53 goto doadd;
|
|
|
54 }
|
|
|
55 }
|
|
|
56 perror("Cannot open archive file");
|
|
|
57 }
|
|
|
58
|
|
|
59 fread(buf, 1, 6, f);
|
|
|
60 if (memcmp("LWAR1V", buf, 6))
|
|
|
61 {
|
|
|
62 fprintf(stderr, "%s is not a valid archive file.\n", archive_file);
|
|
|
63 exit(1);
|
|
|
64 }
|
|
|
65
|
|
|
66 for (;;)
|
|
|
67 {
|
|
|
68 c = fgetc(f);
|
|
|
69 if (c == EOF && ferror(f))
|
|
|
70 {
|
|
|
71 perror("Reading archive file");
|
|
|
72 exit(1);
|
|
|
73 }
|
|
|
74 if (c == EOF)
|
|
|
75 goto doadd;
|
|
|
76
|
|
|
77 if (!c)
|
|
|
78 {
|
|
|
79 fseek(f, -1, SEEK_CUR);
|
|
|
80 goto doadd;
|
|
|
81 }
|
|
|
82
|
|
|
83 // find the end of the file name
|
|
|
84 while (c)
|
|
|
85 {
|
|
|
86 c = fgetc(f);
|
|
|
87 if (c == EOF || ferror(f))
|
|
|
88 {
|
|
|
89 fprintf(stderr, "Bad archive file\n");
|
|
|
90 exit(1);
|
|
|
91 }
|
|
|
92 }
|
|
|
93
|
|
|
94 // get length of archive member
|
|
|
95 l = 0;
|
|
|
96 c = fgetc(f);
|
|
|
97 l = c << 24;
|
|
|
98 c = fgetc(f);
|
|
|
99 l |= c << 16;
|
|
|
100 c = fgetc(f);
|
|
|
101 l |= c << 8;
|
|
|
102 c = fgetc(f);
|
|
|
103 l |= c;
|
|
|
104
|
|
|
105 fseek(f, l, SEEK_CUR);
|
|
|
106 }
|
|
|
107 // back up to the NUL byte at the end of the file
|
|
|
108 fseek(f, -1, SEEK_CUR);
|
|
|
109 doadd:
|
|
|
110 for (i = 0; i < nfiles; i++)
|
|
|
111 {
|
|
|
112 f2 = fopen(files[i], "r");
|
|
|
113 if (!f2)
|
|
|
114 {
|
|
|
115 fprintf(stderr, "Cannot open file %s:", files[i]);
|
|
|
116 perror("");
|
|
|
117 exit(1);
|
|
|
118 }
|
|
|
119 fseek(f2, 0, SEEK_END);
|
|
|
120 l = ftell(f2);
|
|
|
121 fseek(f2, 0, SEEK_SET);
|
|
|
122 fputs(files[i], f);
|
|
|
123 fputc(0, f);
|
|
|
124 fputc(l >> 24, f);
|
|
|
125 fputc((l >> 16) & 0xff, f);
|
|
|
126 fputc((l >> 8) & 0xff, f);
|
|
|
127 fputc(l & 0xff, f);
|
|
|
128 while (l)
|
|
|
129 {
|
|
|
130 c = fgetc(f2);
|
|
|
131 fputc(c, f);
|
|
|
132 l--;
|
|
|
133 }
|
|
|
134 }
|
|
|
135
|
|
|
136 // flag end of file
|
|
|
137 fputc(0, f);
|
|
|
138 }
|
