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dpkg-deb -f and partial -I commands, adds 600 bytes

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This commit is contained in:
Glenn L McGrath
2001-04-13 04:02:57 +00:00
parent 1e04ea388f
commit 445fb952b8
6 changed files with 103 additions and 78 deletions
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9
libbb/deb_extract.c
View File

@ -30,7 +30,11 @@
#include <signal.h>
#include "libbb.h"
extern int deb_extract(const char *package_filename, int function, char *target_dir)
/*
* The contents of argument depend on the value of function.
* It is either a dir name or a control file or field name(see dpkg_deb.c)
*/
extern int deb_extract(const char *package_filename, int function, char *argument)
{
FILE *deb_file, *uncompressed_file;
@ -41,6 +45,7 @@ extern int deb_extract(const char *package_filename, int function, char *target_
switch (function) {
case (extract_info):
case (extract_control):
case (extract_field):
ared_file = xstrdup("control.tar.gz");
break;
default:
@ -70,7 +75,7 @@ extern int deb_extract(const char *package_filename, int function, char *target_
if (function & extract_fsys_tarfile) {
copy_file_chunk(uncompressed_file, stdout, -1);
} else {
untar(uncompressed_file, function, target_dir);
untar(uncompressed_file, function, argument);
}
/* we are deliberately terminating the child so we can safely ignore this */
gz_close(gunzip_pid);

5
libbb/libbb.h
View File

@ -235,10 +235,11 @@ typedef enum extract_function_e {
extract_extract = 8,
extract_verbose_extract = 16,
extract_list = 32,
extract_fsys_tarfile = 64
extract_fsys_tarfile = 64,
extract_field = 128
} extract_function_t;
extern int deb_extract(const char *package_filename, int function, char *target_dir);
extern int untar(FILE *src_tar_file, int untar_function, char *base_path);
extern int untar(FILE *src_tar_file, const int untar_function, const char *argument);
extern int unzip(FILE *l_in_file, FILE *l_out_file);
extern void gz_close(int gunzip_pid);

66
libbb/untar.c
View File

@ -22,7 +22,7 @@
#include <unistd.h>
#include "libbb.h"
extern int untar(FILE *src_tar_file, int untar_function, char *base_path)
extern int untar(FILE *src_tar_file, const int untar_function, const char *argument)
{
typedef struct raw_tar_header {
char name[100]; /* 0-99 */
@ -101,37 +101,18 @@ extern int untar(FILE *src_tar_file, int untar_function, char *base_path)
if (size % 512 != 0) {
next_header_offset += (512 - size % 512);
}
/*
* seek to start of control file, return length
*
if (dpkg_untar_function & dpkg_untar_seek_control) {
if ((raw_tar_header.typeflag == '0') || (raw_tar_header.typeflag == '\0')) {
char *tar_filename;
tar_filename = strrchr(raw_tar_header.name, '/');
if (tar_filename == NULL) {
tar_filename = strdup(raw_tar_header.name);
} else {
tar_filename++;
}
if (strcmp(tar_filename, "control") == 0) {
return(size);
}
}
}
*/
if (untar_function & (extract_contents | extract_verbose_extract)) {
printf("%s\n", raw_tar_header.name);
}
/* extract files */
if (base_path != NULL) {
dir = xmalloc(strlen(raw_tar_header.name) + strlen(base_path) + 2);
sprintf(dir, "%s/%s", base_path, raw_tar_header.name);
if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) {
dir = xmalloc(strlen(raw_tar_header.name) + strlen(argument) + 2);
sprintf(dir, "%s/%s", argument, raw_tar_header.name);
create_path(dir, 0777);
}
switch (raw_tar_header.typeflag ) {
case '0':
case '\0':
@ -145,14 +126,28 @@ extern int untar(FILE *src_tar_file, int untar_function, char *base_path)
uncompressed_count += size;
fclose(dst_file);
}
while (uncompressed_count < next_header_offset) {
if (fgetc(src_tar_file) == EOF) {
perror_msg("untar");
break;
else if (untar_function & extract_info) {
if (strstr(raw_tar_header.name, argument) != NULL) {
copy_file_chunk(src_tar_file, stdout, (unsigned long long) size);
uncompressed_count += size;
}
}
else if (untar_function & extract_field) {
if (strstr(raw_tar_header.name, "./control") != NULL) {
char *line;
while ((line = get_line_from_file(src_tar_file)) != NULL) {
uncompressed_count += strlen(line);
if (argument == NULL) {
printf("%s",line);
}
else if (strncmp(line, argument, strlen(argument)) == 0) {
char *file_ptr;
file_ptr = strstr(line, ": ");
printf("%s", file_ptr + 2);
}
}
}
uncompressed_count++;
}
uncompressed_count += size;
break;
}
case '5':
@ -193,6 +188,17 @@ extern int untar(FILE *src_tar_file, int untar_function, char *base_path)
free(dir);
return(EXIT_FAILURE);
}
/*
* Seek to start of next block, cant use fseek as unzip() does support it
*/
while (uncompressed_count < next_header_offset) {
if (fgetc(src_tar_file) == EOF) {
break;
}
uncompressed_count++;
}
// free(dir);
}
return(EXIT_SUCCESS);