2 files changed, 103 insertions, 2 deletions

diff --git a/lib/common/src/fstree_cli.c b/lib/common/src/fstree_cli.c
new file mode 100644
index 0000000..179a1f5
--- /dev/null
+++ b/lib/common/src/fstree_cli.c
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * fstree_cli.c
+ *
+ * Copyright (C) 2023 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+#include "common.h"
+#include "util/util.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+enum {
+	DEF_UID = 0,
+	DEF_GID,
+	DEF_MODE,
+	DEF_MTIME,
+};
+
+static const char *defaults[] = {
+	[DEF_UID] = "uid",
+	[DEF_GID] = "gid",
+	[DEF_MODE] = "mode",
+	[DEF_MTIME] = "mtime",
+	NULL
+};
+
+int parse_fstree_defaults(fstree_defaults_t *sb, char *subopts)
+{
+	char *value;
+	long lval;
+	int i;
+
+	memset(sb, 0, sizeof(*sb));
+	sb->mode = S_IFDIR | 0755;
+	sb->mtime = get_source_date_epoch();
+
+	if (subopts == NULL)
+		return 0;
+
+	while (*subopts != '\0') {
+		i = getsubopt(&subopts, (char *const *)defaults, &value);
+
+		if (value == NULL) {
+			fprintf(stderr, "Missing value for option %s\n",
+				defaults[i]);
+			return -1;
+		}
+
+		switch (i) {
+		case DEF_UID:
+			lval = strtol(value, NULL, 0);
+			if (lval < 0)
+				goto fail_uv;
+			if (lval > (long)INT32_MAX)
+				goto fail_ov;
+			sb->uid = lval;
+			break;
+		case DEF_GID:
+			lval = strtol(value, NULL, 0);
+			if (lval < 0)
+				goto fail_uv;
+			if (lval > (long)INT32_MAX)
+				goto fail_ov;
+			sb->gid = lval;
+			break;
+		case DEF_MODE:
+			lval = strtol(value, NULL, 0);
+			if (lval < 0)
+				goto fail_uv;
+			if (lval > 07777)
+				goto fail_ov;
+			sb->mode = S_IFDIR | (sqfs_u16)lval;
+			break;
+		case DEF_MTIME:
+			lval = strtol(value, NULL, 0);
+			if (lval < 0)
+				goto fail_uv;
+			if (lval > (long)UINT32_MAX)
+				goto fail_ov;
+			sb->mtime = lval;
+			break;
+		default:
+			fprintf(stderr, "Unknown option '%s'\n", value);
+			return -1;
+		}
+	}
+	return 0;
+fail_uv:
+	fprintf(stderr, "%s: value must be positive\n", defaults[i]);
+	return -1;
+fail_ov:
+	fprintf(stderr, "%s: value too large\n", defaults[i]);
+	return -1;
+}
diff --git a/lib/common/src/writer/init.c b/lib/common/src/writer/init.c
index fe5fcc5..60d7a12 100644
--- a/lib/common/src/writer/init.c
+++ b/lib/common/src/writer/init.c
@@ -46,6 +46,7 @@ int sqfs_writer_init(sqfs_writer_t *sqfs, const sqfs_writer_cfg_t *wrcfg)
 {
 	sqfs_block_processor_desc_t blkdesc;
 	sqfs_compressor_config_t cfg;
+	fstree_defaults_t fsd;
 	int ret, flags;
 
 	sqfs->filename = wrcfg->filename;
@@ -62,7 +63,10 @@ int sqfs_writer_init(sqfs_writer_t *sqfs, const sqfs_writer_cfg_t *wrcfg)
 		return -1;
 	}
 
-	if (fstree_init(&sqfs->fs, wrcfg->fs_defaults))
+	if (parse_fstree_defaults(&fsd, wrcfg->fs_defaults))
+		goto fail_file;
+
+	if (fstree_init(&sqfs->fs, &fsd))
 		goto fail_file;
 
 	ret = sqfs_compressor_create(&cfg, &sqfs->cmp);
@@ -99,7 +103,7 @@ int sqfs_writer_init(sqfs_writer_t *sqfs, const sqfs_writer_cfg_t *wrcfg)
 	}
 
 	ret = sqfs_super_init(&sqfs->super, wrcfg->block_size,
-			      sqfs->fs.defaults.st_mtime, wrcfg->comp_id);
+			      sqfs->fs.defaults.mtime, wrcfg->comp_id);
 	if (ret) {
 		sqfs_perror(wrcfg->filename, "initializing super block", ret);
 		goto fail_uncmp;