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Reorganise archive extraction code

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This commit is contained in:
Glenn L McGrath
2001-06-13 07:26:39 +00:00
parent dab3d46b9d
commit 9aff903603
11 changed files with 330 additions and 343 deletions
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88
archival/ar.c
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@@ -30,36 +30,27 @@
extern int ar_main(int argc, char **argv)
{
const int preserve_date = 1; /* preserve original dates */
const int verbose = 2; /* be verbose */
const int display = 4; /* display contents */
const int extract_to_file = 8; /* extract contents of archive */
const int extract_to_stdout = 16; /* extract to stdout */
FILE *src_file = NULL, *dst_file = NULL;
int funct = 0, opt=0;
ar_headers_t *head, *ar_extract_list=NULL;
ar_extract_list = (ar_headers_t *) xcalloc(1, sizeof(ar_headers_t));
head = (ar_headers_t *) xcalloc(1, sizeof(ar_headers_t));
FILE *src_stream = NULL;
int extract_function = 0, opt = 0;
file_headers_t *head;
file_headers_t *ar_extract_list = NULL;
while ((opt = getopt(argc, argv, "ovtpx")) != -1) {
switch (opt) {
case 'o':
funct |= preserve_date;
extract_function |= extract_preserve_date;
break;
case 'v':
funct |= verbose;
extract_function |= extract_verbose_list;
break;
case 't':
funct |= display;
extract_function |= extract_list;
break;
case 'p':
funct |= extract_to_stdout;
extract_function |= extract_to_stdout;
break;
case 'x':
funct |= extract_to_file;
extract_function |= extract_all_to_fs;
break;
default:
show_usage();
@@ -71,57 +62,28 @@ extern int ar_main(int argc, char **argv)
show_usage();
}
if ( (src_file = wfopen(argv[optind], "r")) < 0) {
error_msg_and_die("Cannot read %s", argv[optind]);
}
src_stream = xfopen(argv[optind++], "r");
head = get_ar_headers(src_stream);
optind++;
head = get_ar_headers(src_file);
/* find files to extract or display */
/* search through argv and build extract list */
for (;optind < argc; optind++) {
ar_headers_t *ar_entry;
ar_entry = (ar_headers_t *) xcalloc(1, sizeof(ar_headers_t));
ar_entry = head;
while (ar_entry->next != NULL) {
if (strcmp(argv[optind], ar_entry->name) == 0) {
ar_headers_t *tmp;
tmp = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
*tmp = *ar_extract_list;
*ar_extract_list = *ar_entry;
ar_extract_list->next = tmp;
break;
}
ar_entry=ar_entry->next;
ar_extract_list = (file_headers_t *) xcalloc(1, sizeof(file_headers_t));
if (optind < argc) {
while (optind < argc) {
ar_extract_list = add_from_archive_list(head, ar_extract_list, argv[optind]);
optind++;
}
}
/* if individual files not found extract all files */
if (ar_extract_list->next==NULL) {
} else {
ar_extract_list = head;
}
/* find files to extract or display */
while (ar_extract_list->next != NULL) {
if (funct & extract_to_file) {
dst_file = wfopen(ar_extract_list->name, "w");
}
else if (funct & extract_to_stdout) {
dst_file = stdout;
}
if ((funct & extract_to_file) || (funct & extract_to_stdout)) {
fseek(src_file, ar_extract_list->offset, SEEK_SET);
copy_file_chunk(src_file, dst_file, ar_extract_list->size);
}
if (funct & verbose) {
printf("%s %d/%d %8d %s ", mode_string(ar_extract_list->mode),
ar_extract_list->uid, ar_extract_list->gid,
(int) ar_extract_list->size, time_string(ar_extract_list->mtime));
}
if ((funct & display) || (funct & verbose)){
puts(ar_extract_list->name);
}
ar_extract_list = ar_extract_list->next;
}
/* If there isnt even one possible entry then abort */
if (ar_extract_list->name == NULL) {
error_msg_and_die("No files to extract");
}
fseek(src_stream, 0, SEEK_SET);
extract_archive(src_stream, stdout, ar_extract_list, extract_function, "./");
return EXIT_SUCCESS;
}