untar changed to allow deb_extract to extract to memory, allows better operation of dpkg-deb -f
diff --git a/libbb/untar.c b/libbb/untar.c
index b768c0b..e70032c 100644
--- a/libbb/untar.c
+++ b/libbb/untar.c
@@ -22,7 +22,7 @@
#include <unistd.h>
#include "libbb.h"
-extern int untar(FILE *src_tar_file, const int untar_function, const char *argument)
+extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, const char *argument)
{
typedef struct raw_tar_header {
char name[100]; /* 0-99 */
@@ -103,13 +103,12 @@
}
if (untar_function & (extract_contents | extract_verbose_extract)) {
- printf("%s\n", raw_tar_header.name);
+ fprintf(output, "%s\n", raw_tar_header.name);
}
/* extract files */
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);
+ dir = concat_path_file(argument, raw_tar_header.name);
create_path(dir, 0777);
}
@@ -120,33 +119,27 @@
* supposed to be a directory, and fall through
*/
if (raw_tar_header.name[strlen(raw_tar_header.name)-1] != '/') {
- if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) {
- FILE *dst_file = wfopen(dir, "w");
- copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size);
- uncompressed_count += size;
- fclose(dst_file);
- }
- 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);
- }
- }
- }
+ switch (untar_function) {
+ case (extract_extract):
+ case (extract_verbose_extract):
+ case (extract_control): {
+ FILE *dst_file = wfopen(dir, "w");
+ copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size);
+ uncompressed_count += size;
+ fclose(dst_file);
+ }
+ break;
+ case (extract_info):
+ if (strstr(raw_tar_header.name, argument) != NULL) {
+ copy_file_chunk(src_tar_file, stdout, (unsigned long long) size);
+ uncompressed_count += size;
+ }
+ break;
+ case (extract_field):
+ if (strstr(raw_tar_header.name, "control") != NULL) {
+ return(read_text_file_to_buffer(src_tar_file));
+ }
+ break;
}
break;
}
@@ -155,7 +148,7 @@
if (create_path(dir, mode) != TRUE) {
free(dir);
perror_msg("%s: Cannot mkdir", raw_tar_header.name);
- return(EXIT_FAILURE);
+ return NULL;
}
}
break;
@@ -164,7 +157,7 @@
if (link(raw_tar_header.linkname, raw_tar_header.name) < 0) {
free(dir);
perror_msg("%s: Cannot create hard link to '%s'", raw_tar_header.name, raw_tar_header.linkname);
- return(EXIT_FAILURE);
+ return NULL;
}
}
break;
@@ -173,7 +166,7 @@
if (symlink(raw_tar_header.linkname, raw_tar_header.name) < 0) {
free(dir);
perror_msg("%s: Cannot create symlink to '%s'", raw_tar_header.name, raw_tar_header.linkname);
- return(EXIT_FAILURE);
+ return NULL;
}
}
break;
@@ -186,7 +179,7 @@
default:
error_msg("Unknown file type '%c' in tar file", raw_tar_header.typeflag);
free(dir);
- return(EXIT_FAILURE);
+ return NULL;
}
/*
@@ -201,5 +194,5 @@
// free(dir);
}
- return(EXIT_SUCCESS);
+ return NULL;
}