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-rw-r--r--include/id_table.h20
-rw-r--r--lib/Makemodule.am1
-rw-r--r--lib/sqfs/id_table.c52
-rw-r--r--mkfs/mksquashfs.c7
-rw-r--r--mkfs/mksquashfs.h3
5 files changed, 82 insertions, 1 deletions
diff --git a/include/id_table.h b/include/id_table.h
new file mode 100644
index 0000000..6d5d416
--- /dev/null
+++ b/include/id_table.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#ifndef ID_TABLE_H
+#define ID_TABLE_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+typedef struct {
+ uint32_t *ids;
+ size_t num_ids;
+ size_t max_ids;
+} id_table_t;
+
+int id_table_init(id_table_t *tbl);
+
+void id_table_cleanup(id_table_t *tbl);
+
+int id_table_id_to_index(id_table_t *tbl, uint32_t id, uint16_t *out);
+
+#endif /* ID_TABLE_H */
diff --git a/lib/Makemodule.am b/lib/Makemodule.am
index 86f1766..b12367d 100644
--- a/lib/Makemodule.am
+++ b/lib/Makemodule.am
@@ -8,6 +8,7 @@ libcompress_a_CPPFLAGS = $(AM_CPPFLAGS)
libsquashfs_a_SOURCES = include/meta_writer.h include/squashfs.h
libsquashfs_a_SOURCES += lib/sqfs/meta_writer.c lib/sqfs/super.c
+libsquashfs_a_SOURCES += lib/sqfs/id_table.c include/id_table.h
libutil_a_SOURCES = lib/util/canonicalize_name.c lib/util/write_retry.c
libutil_a_SOURCES += lib/util/read_retry.c include/util.h
diff --git a/lib/sqfs/id_table.c b/lib/sqfs/id_table.c
new file mode 100644
index 0000000..cd31360
--- /dev/null
+++ b/lib/sqfs/id_table.c
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "id_table.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+int id_table_init(id_table_t *tbl)
+{
+ memset(tbl, 0, sizeof(*tbl));
+ return 0;
+}
+
+void id_table_cleanup(id_table_t *tbl)
+{
+ free(tbl->ids);
+}
+
+int id_table_id_to_index(id_table_t *tbl, uint32_t id, uint16_t *out)
+{
+ size_t i, sz;
+ void *ptr;
+
+ for (i = 0; i < tbl->num_ids; ++i) {
+ if (tbl->ids[i] == id) {
+ *out = i;
+ return 0;
+ }
+ }
+
+ if (tbl->num_ids == 0x10000) {
+ fputs("Too many unique UIDs/GIDs (more than 64k)!\n", stderr);
+ return -1;
+ }
+
+ if (tbl->num_ids == tbl->max_ids) {
+ sz = (tbl->max_ids ? tbl->max_ids * 2 : 16);
+ ptr = realloc(tbl->ids, sizeof(tbl->ids[0]) * sz);
+
+ if (ptr == NULL) {
+ perror("growing ID table");
+ return -1;
+ }
+
+ tbl->ids = ptr;
+ tbl->max_ids = sz;
+ }
+
+ *out = tbl->num_ids;
+ tbl->ids[tbl->num_ids++] = id;
+ return 0;
+}
diff --git a/mkfs/mksquashfs.c b/mkfs/mksquashfs.c
index 7503978..3272dbc 100644
--- a/mkfs/mksquashfs.c
+++ b/mkfs/mksquashfs.c
@@ -84,10 +84,13 @@ int main(int argc, char **argv)
return EXIT_FAILURE;
}
+ if (id_table_init(&info.idtbl))
+ return EXIT_FAILURE;
+
info.outfd = open(info.opt.outfile, info.opt.outmode, 0644);
if (info.outfd < 0) {
perror(info.opt.outfile);
- return EXIT_FAILURE;
+ goto out_idtbl;
}
if (sqfs_super_write(&info.super, info.outfd))
@@ -129,5 +132,7 @@ out_fstree:
fstree_cleanup(&info.fs);
out_outfd:
close(info.outfd);
+out_idtbl:
+ id_table_cleanup(&info.idtbl);
return status;
}
diff --git a/mkfs/mksquashfs.h b/mkfs/mksquashfs.h
index 2e0183e..5522268 100644
--- a/mkfs/mksquashfs.h
+++ b/mkfs/mksquashfs.h
@@ -4,6 +4,7 @@
#include "squashfs.h"
#include "compress.h"
+#include "id_table.h"
#include "fstree.h"
#include "config.h"
@@ -43,6 +44,8 @@ typedef struct {
file_info_t *frag_list;
size_t frag_offset;
+ id_table_t idtbl;
+
compressor_t *cmp;
} sqfs_info_t;