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-rw-r--r--src/xz/args.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/xz/args.c b/src/xz/args.c
index c31f759a..b831946f 100644
--- a/src/xz/args.c
+++ b/src/xz/args.c
@@ -724,6 +724,14 @@ args_parse(args_info *args, int argc, char **argv)
&& opt_mode != MODE_LIST))
coder_set_compression_settings();
+ // If raw format is used and a custom suffix is not provided,
+ // then only stdout mode can be used when compressing or decompressing.
+ if (opt_format == FORMAT_RAW && !suffix_is_set() && !opt_stdout
+ && (opt_mode == MODE_COMPRESS
+ || opt_mode == MODE_DECOMPRESS))
+ message_fatal(_("With --format=raw, --suffix=.SUF is "
+ "required unless writing to stdout"));
+
// If no filenames are given, use stdin.
if (argv[optind] == NULL && args->files_name == NULL) {
// We don't modify or free() the "-" constant. The caller