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authorGlenn L McGrath <bug1@ihug.co.nz>2001-04-11 01:37:03 +0000
committerGlenn L McGrath <bug1@ihug.co.nz>2001-04-11 01:37:03 +0000
commit9d53c8ab74ecb2be62ebf4c61350b842787cc6b9 (patch)
treec351bc7377b948c358f0f9c7da1f225b6f349ee3 /ar.c
parent93ffa950bfd349c8d8ff40f1f862f2b7483584d4 (diff)
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Move get_ar_headers to libbb, make dpkg_deb.c independent of ar.c
Diffstat (limited to 'ar.c')
-rw-r--r--ar.c102
1 files changed, 0 insertions, 102 deletions
diff --git a/ar.c b/ar.c
index 89c43b43d..fbbc7aa64 100644
--- a/ar.c
+++ b/ar.c
@@ -23,113 +23,11 @@
23 * 23 *
24 */ 24 */
25#include <fcntl.h> 25#include <fcntl.h>
26#include <string.h>
27#include <stdlib.h> 26#include <stdlib.h>
28#include <getopt.h> 27#include <getopt.h>
29#include <unistd.h> 28#include <unistd.h>
30#include "busybox.h" 29#include "busybox.h"
31 30
32typedef struct ar_headers_s {
33 char *name;
34 off_t size;
35 uid_t uid;
36 gid_t gid;
37 mode_t mode;
38 time_t mtime;
39 off_t offset;
40 struct ar_headers_s *next;
41} ar_headers_t;
42
43/*
44 * return the headerL_t struct for the filename descriptor
45 */
46extern ar_headers_t get_ar_headers(int srcFd)
47{
48 typedef struct raw_ar_header_s { /* Byte Offset */
49 char name[16]; /* 0-15 */
50 char date[12]; /* 16-27 */
51 char uid[6];
52 char gid[6]; /* 28-39 */
53 char mode[8]; /* 40-47 */
54 char size[10]; /* 48-57 */
55 char fmag[2]; /* 58-59 */
56 } raw_ar_header_t;
57
58 raw_ar_header_t raw_ar_header;
59
60 ar_headers_t *head, *entry;
61 char ar_magic[8];
62 char *long_name=NULL;
63
64 head = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
65 entry = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
66
67 /* check ar magic */
68 if (full_read(srcFd, ar_magic, 8) != 8) {
69 error_msg_and_die("cannot read magic");
70 }
71
72 if (strncmp(ar_magic,"!<arch>",7) != 0) {
73 error_msg_and_die("invalid magic");
74 }
75
76 while (full_read(srcFd, (char *) &raw_ar_header, 60)==60) {
77 /* check the end of header markers are valid */
78 if ((raw_ar_header.fmag[0]!='`') || (raw_ar_header.fmag[1]!='\n')) {
79 char newline;
80 if (raw_ar_header.fmag[1]!='`') {
81 break;
82 }
83 /* some version of ar, have an extra '\n' after each entry */
84 read(srcFd, &newline, 1);
85 if (newline!='\n') {
86 break;
87 }
88 /* fix up the header, we started reading 1 byte too early due to a '\n' */
89 memmove((char *) &raw_ar_header, (char *)&raw_ar_header+1, 59);
90 /* dont worry about adding the last '\n', we dont need it now */
91 }
92
93 entry->size = (off_t) atoi(raw_ar_header.size);
94 /* long filenames have '/' as the first character */
95 if (raw_ar_header.name[0] == '/') {
96 if (raw_ar_header.name[1] == '/') {
97 /* multiple long filenames are stored as data in one entry */
98 long_name = (char *) xrealloc(long_name, entry->size);
99 full_read(srcFd, long_name, entry->size);
100 continue;
101 }
102 else {
103 /* The number after the '/' indicates the offset in the ar data section
104 (saved in variable long_name) that conatains the real filename */
105 const int long_name_offset = (int) atoi((char *) &raw_ar_header.name[1]);
106 entry->name = xmalloc(strlen(&long_name[long_name_offset]));
107 strcpy(entry->name, &long_name[long_name_offset]);
108 }
109 }
110 else {
111 /* short filenames */
112 entry->name = xmalloc(16);
113 strncpy(entry->name, raw_ar_header.name, 16);
114 }
115 entry->name[strcspn(entry->name, " /")]='\0';
116
117 /* convert the rest of the now valid char header to its typed struct */
118 parse_mode(raw_ar_header.mode, &entry->mode);
119 entry->mtime = atoi(raw_ar_header.date);
120 entry->uid = atoi(raw_ar_header.uid);
121 entry->gid = atoi(raw_ar_header.gid);
122 entry->offset = lseek(srcFd, 0, SEEK_CUR);
123
124 /* add this entries header to our combined list */
125 entry->next = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
126 *entry->next = *head;
127 *head = *entry;
128 lseek(srcFd, (off_t) entry->size, SEEK_CUR);
129 }
130 return(*head);
131}
132
133extern int ar_main(int argc, char **argv) 31extern int ar_main(int argc, char **argv)
134{ 32{
135 const int preserve_date = 1; /* preserve original dates */ 33 const int preserve_date = 1; /* preserve original dates */