Nore unarchive (and doc) fixes from Laurence Anderson

git-svn-id: svn://busybox.net/trunk/busybox@2894 69ca8d6d-28ef-0310-b511-8ec308f3f277

2 files changed, 16 insertions, 10 deletions

diff --git a/libbb/libbb.h b/libbb/libbb.h
index a547953a1..102596c1f 100644
--- a/libbb/libbb.h
+++ b/libbb/libbb.h
@@ -227,7 +227,7 @@ enum extract_functions_e {
         extract_control_tar_gz = 128,
         extract_unzip_only = 256,
         extract_unconditional = 512,
-        extract_create_dirs = 1024
+        extract_create_leading_dirs = 1024
 };
 char *unarchive(FILE *src_stream, void *(*get_header)(FILE *),
         const int extract_function, const char *prefix, char **extract_names);
diff --git a/libbb/unarchive.c b/libbb/unarchive.c
index 20609ded7..4847aab6b 100644
--- a/libbb/unarchive.c
+++ b/libbb/unarchive.c
@@ -129,12 +129,17 @@ char *extract_archive(FILE *src_stream, FILE *out_stream, const file_header_t *f
                                 }
                         } else {
                                 error_msg("%s not created: newer or same age file exists", file_entry->name);
-                                if (S_ISREG(file_entry->mode)) {
                                         seek_sub_file(src_stream, file_entry->size);
-                                }
                                 return (NULL);
                         }
                 }
+                if (function & extract_create_leading_dirs) { /* Create leading directories with default umask */
+                        char *parent = dirname(full_name);
+                        if (make_directory (parent, -1, FILEUTILS_RECUR) != 0) {
+                                error_msg("couldn't create leading directories");
+                        }
+                        free (parent);
+                }
                 switch(file_entry->mode & S_IFMT) {
                         case S_IFREG:
                                 if (file_entry->link_name) { /* Found a cpio hard link */
@@ -153,9 +158,7 @@ char *extract_archive(FILE *src_stream, FILE *out_stream, const file_header_t *f
                                 }
                                 break;
                         case S_IFDIR:
-                                if ((function & extract_create_dirs) && (stat_res != 0)) {
-                                        /* Make sure the prefix component of full_name was create
-                                         * in applet before getting here*/
+                                if (stat_res != 0) {
                                         if (mkdir(full_name, file_entry->mode) < 0) {
                                                 perror_msg("extract_archive: ");
                                         }
@@ -239,9 +242,6 @@ char *unarchive(FILE *src_stream, void *(*get_headers)(FILE *),
                         }
                         if (!found) {
                                 /* seek past the data entry */
-                                if (!S_ISLNK(file_entry->mode) && file_entry->link_name && file_entry->size == 0) {
-                                        error_msg("You should extract %s as other files are hardlinked to it", file_entry->name);
-                                }
                                 seek_sub_file(src_stream, file_entry->size);
                                 continue;
                         }
@@ -271,6 +271,7 @@ void *get_header_ar(FILE *src_stream)
         static char *ar_long_names;
 
         if (fread(ar.raw, 1, 60, src_stream) != 60) {
+                free (ar_long_names);
                 return(NULL);
         }
         archive_offset += 60;
@@ -308,7 +309,11 @@ void *get_header_ar(FILE *src_stream)
                         archive_offset += typed->size;
                         /* This ar entries data section only contained filenames for other records
                          * they are stored in the static ar_long_names for future reference */
-                        return(NULL);
+                        return (get_header_ar(src_stream)); /* Return next header */
+                } else if (ar.formated.name[1] == ' ') {
+                        /* This is the index of symbols in the file for compilers */
+                        seek_sub_file(src_stream, typed->size);
+                        return (get_header_ar(src_stream)); /* Return next header */
                 } else {
                         /* The number after the '/' indicates the offset in the ar data section
                         (saved in variable long_name) that conatains the real filename */
@@ -413,6 +418,7 @@ void *get_header_cpio(FILE *src_stream)
                                         cpio_entry->link_name = (char *) xcalloc(1, cpio_entry->size + 1);
                                         fread(cpio_entry->link_name, 1, cpio_entry->size, src_stream);
                                         archive_offset += cpio_entry->size;
+                                        cpio_entry->size = 0; /* Stop possiable seeks in future */
                                 }
                                 if (nlink > 1 && !S_ISDIR(cpio_entry->mode)) {
                                         if (cpio_entry->size == 0) { /* Put file on a linked list for later */